CN100574043C - Electric power system and electric power system method of operation with far-end control circuit - Google Patents
Electric power system and electric power system method of operation with far-end control circuit Download PDFInfo
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- CN100574043C CN100574043C CNB2006101404046A CN200610140404A CN100574043C CN 100574043 C CN100574043 C CN 100574043C CN B2006101404046 A CNB2006101404046 A CN B2006101404046A CN 200610140404 A CN200610140404 A CN 200610140404A CN 100574043 C CN100574043 C CN 100574043C
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Abstract
A kind of electric power system and a kind of electric power system method of operation with far-end control circuit, to system, and far-end control circuit comprises first resistance, first operational amplifier, second operational amplifier, selects circuit this electric power system by far-end control power supply unit and powered battery.Wherein first resistance is coupled between far-end control power supply unit and the battery.First operational amplifier is detected the electric current of first resistance to export first control signal.The voltage of second operational amplifier detecting battery is to export second control signal.Select circuit to export voltage junior in the middle of first control signal and second control signal, to adjust the voltage of far-end control power supply unit, it is close to make far-end control the voltage of the voltage of power supply unit and battery as the far-end control signal.
Description
Technical field
The invention relates to a kind of electric power system and a kind of electric power system method of operation, and particularly relevant for a kind of electric power system with far-end control circuit and a kind of can be by power supply unit and battery simultaneously to the electric power system method of operation of system's power supply.
Background technology
Electronic product now quite is particular about the stability in power supply source, because if the supply of the power supply of electronic product is unstable, then directly influence the stability and the reliability of electronic product.Therefore, it is to adopt power supply unit and battery to come the required power supply of supplies electrons product that a technology is arranged, as shown in Figure 1.
Fig. 1 is existing electric power system schematic diagram.Please refer to Fig. 1, Fig. 1 comprises conventional power source supply 101, first switch 102, charger 103, second switch 104, battery 105, system 106.Wherein, the power output of supposing conventional power source supply 101 is 45 watts (watt).Conventional power source supply 101 sees through 106 power supplies of 102 pairs of systems of first switch, and conventional power source supply 101 also sees through first switch 102 and 105 chargings of 103 pairs of batteries of charger.Battery 105 sees through 106 power supplies of 104 pairs of systems of second switch.
Prior art as shown in Figure 1, it be owing to can't adjust the voltage unanimity of conventional power source supply 101 and battery 105, thereby causes conventional power source supply 101 and the battery 105 can't be simultaneously to system's 106 power supplies.When if the load of system 106 rises to 50W; battery 105 also can't be to the parallel power supply of system; because the second switch 104 that electric current I flow through is to adopt general P type MOS (metal-oxide-semiconductor) transistor (the P-type metal-oxide-semiconductortransistor that includes body diode (bodydiode); abbreviate PMOS as) as isolating switch; so as to 105 power supplies of control battery; when conventional power source supply 101 does to protect action (when for example surpassing the rated output power of conventional power source supply 101) or conventional power source supply 101 not to exist; second switch 104 just can be at the state of conducting (on); and when the load of system 106 increases; include the effectively rectification of general PMOS of body diode; so can cause second switch 104 to burn, thereby cause battery 105 and conventional power source supply 101 to power to system 106 simultaneously.
In addition, because this prior art also can't change the output voltage of conventional power source supply 101, level off to the output voltage of battery 105 so can't make output voltage do in the interval of 9～13 volts (volt) to change, so also can't satisfy the restriction direct voltage 2 that company released (the Narrow Direct Current Voltage 2 of Intel (Intel), also be called Narrow VDC2 or NVDC2) requirement of the notion of motion, and because conventional power source supply 101 need provide the electric power of the load of system 106 at least, yet but conventional power source supply 101 can't be done parallel power supply by other power supplys, thereby the volume of conventional power source supply 101 can't Flexible Design.
Summary of the invention
Purpose of the present invention just provides a kind of electric power system with far-end control circuit, and it can allow simultaneously system to be powered by power supply unit and battery.
A further object of the present invention provides a kind of electric power system method of operation, and it can allow simultaneously system to be powered by power supply unit and battery.
Based on above-mentioned and other purpose, the present invention proposes a kind of electric power system with far-end control circuit, to system, this far-end control circuit comprises first resistance, first operational amplifier (Operational Amplifier), second operational amplifier, selects circuit by far-end control power supply unit and powered battery for it.Wherein, first resistance is coupled between far-end control power supply unit and the battery.First operational amplifier is in order to detecting the electric current of first resistance, and exports first control signal according to this.Second operational amplifier and is exported second control signal according to this in order to the voltage of detecting battery.Select circuit to export first control signal and the central voltage junior of second control signal, with as the far-end control signal, this far-end control signal is in order to adjust the voltage of far-end control power supply unit, and the voltage that makes far-end control power supply unit is close with the voltage of battery and control the battery charge battery and be no more than preset value.
Based on above-mentioned and other purpose, the present invention proposes a kind of electric power system method of operation, and it comprises: detect the charging current of battery to export first control signal by first operational amplifier.Detect the voltage of battery to export second control signal by second operational amplifier.Utilize to select circuit to export voltage junior in the middle of first control signal and second control signal, as the far-end control signal and the feed-in far-end is controlled power supply unit.Adjust the voltage of far-end control power supply unit according to the far-end control signal, the voltage that makes far-end control power supply unit is close with the voltage of battery and control the battery charge battery and be no more than preset value.
According to the described electric power system of preferred embodiment of the present invention, the first above-mentioned operational amplifier is respectively coupled to the two ends of first resistance with two inputs, and second operational amplifier is coupled to first resistance and battery with first input end, receives second reference voltage with second input.In addition, far-end control circuit more comprises second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance and the 7th resistance.
Wherein, second resistance is coupled to first resistance and battery with an end, is coupled to the negative pole end of first operational amplifier with the other end.The 3rd resistance is coupled between the negative pole end of first reference voltage and first operational amplifier.The 4th resistance is coupled to first resistance and far-end control power supply unit with an end, is coupled to the positive terminal of first operational amplifier with the other end.The 5th resistance is coupled to the positive terminal of first operational amplifier with an end, with other end ground connection.The 6th resistance is coupled to first resistance and battery with an end, is coupled to the positive terminal of second operational amplifier with the other end.The 7th resistance is coupled to the positive terminal of second operational amplifier with an end, with other end ground connection, and the negative pole termination second reference voltage VREF2 of second operational amplifier.
According to the described electric power system of preferred embodiment of the present invention, wherein select circuit to comprise first diode and second diode.Wherein, first diode receives first control signal with negative electrode, and second diode receives second control signal with negative electrode, and the anode of above-mentioned two diodes all is coupled to a contact, this contact output far-end control signal.
According to the described electric power system of preferred embodiment of the present invention, it more comprises first switch and second switch.Wherein, first switch is coupled to far-end control power supply unit with an end, is coupled to battery and system with the other end, if there is then conducting (on) in far-end control power supply unit, otherwise closes (off).Second switch is coupled to first resistance and system with first end, be coupled to battery with second end, and this second switch receives charging control signal, if charging control signal is a then two-way admittance of charged state, if charging control signal is the not then unidirectional conducting of the direction along battery to system of charged state.
According to the described electric power system of preferred embodiment of the present invention, second switch comprises Schottky diode and PMOS transistor.Wherein, Schottky diode is coupled between first end and second end of second switch.The PMOS transistor is coupled to first end of second switch with drain, is coupled to second end of second switch with source electrode, and according to charging control signal and conducting or end.
According to the described electric power system of preferred embodiment of the present invention, second switch comprises PMOS transistor, logical circuit and the 3rd operational amplifier.Wherein, the PMOS transistor is coupled to first end of second switch with drain, is coupled to second end of second switch with source electrode.Logical circuit carries out logical operation to charging control signal, provides the transistorized gate to PMOS with the charging control signal after the computing.The 3rd operational amplifier is at charging control signal during for charged state not, with the voltage between two input detecting PMOS transistor drains and the source electrode, and provide and output signal to the transistorized gate of PMOS, this output signal keep above-mentioned voltage not to be higher than predeterminated voltage and keep battery to system's folk prescription to current lead-through.
According to the described electric power system method of operation of preferred embodiment of the present invention, wherein electric power system more comprises switch, this switch is coupled to far-end control power supply unit and system with first end, be coupled to battery with second end, receive charging control signal, if charging control signal is a then two-way admittance of charged state, if charging control signal is the not then unidirectional conducting of the direction along battery to system of charged state.
According to the described electric power system method of operation of preferred embodiment of the present invention, wherein switch comprises the PMOS transistor, this PMOS transistor is coupled to second end of switch with drain, be coupled to first end of switch with source electrode, this electric power system method of operation more comprises: charging control signal is carried out logical operation, provide the transistorized gate to PMOS with the charging control signal after the computing., according to the voltage between PMOS transistor drain and the source electrode, provide to output signal to the transistorized gate of PMOS during for charged state not at charging control signal, this output signal keeps above-mentioned voltage not to be higher than predeterminated voltage.
According to described electric power system of preferred embodiment of the present invention and electric power system method of operation, wherein (Embedded Controller, EC), this embedded controller provides charging control signal according to the electric weight of battery to charging control signal from embedded controller.
According to the described electric power system method of operation of preferred embodiment of the present invention, it more comprises: if the load of system surpasses the peak power output of far-end control power supply unit, then supply with peak power output to system by far-end control power supply unit, and by the required not enough electric power of battery feed system.If the electric weight of battery is higher than the peak power output that the load of preset value and system does not surpass far-end control power supply unit, then far-end control power supply unit supplies power to system, and not to battery charge.If the electric weight of battery is lower than the peak power output that the load of preset value and system does not surpass far-end control power supply unit, then far-end control power supply unit supplies power to system, and to battery charge.If the electric weight of battery is lower than the peak power output that the load of preset value and system surpasses far-end control power supply unit, then far-end control power supply unit stops battery charge, supply with the maximum power of exporting to system by far-end control power supply unit, and supply the required not enough electric power of system by battery.
The present invention detects the charging current of battery and the voltage of battery respectively because of adopting two operational amplifiers, and one of them output of selecting two operational amplifiers feeds back to far-end control power supply unit, to adjust the voltage of far-end control power supply unit, make that the voltage of far-end control power supply unit is close with the voltage of battery, and control battery charge and be no more than preset value.Therefore, electric power system of the present invention and electric power system method of operation can allow simultaneously system to be powered by far-end control power supply unit and battery, and make that also the volume of far-end control power supply unit can Flexible Design.
In addition, if the switch that is coupled to battery-end among the present invention is for adopting operational amplifier and PMOS transistor, and make operational amplifier at charging control signal during for charged state not, with the voltage between two input detecting PMOS transistor drains and the source electrode, operational amplifier provides and outputs signal to the transistorized gate of PMOS then, this output signal can keep above-mentioned voltage not to be higher than the predeterminated voltage of switch, reach the purpose of low pressure drop, so also not having switch is burnt, thereby the problem that causes battery and far-end control power supply unit to power to system simultaneously.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
Fig. 1 is existing electric power system schematic diagram.
Fig. 2 is the circuit block diagram according to the electric power system with far-end control circuit of a preferred embodiment of the present invention.
Fig. 3 is the circuit diagram 300 according to the second switch 205 of a preferred embodiment of the present invention.
Fig. 4 is another circuit diagram 400 according to the second switch 205 of a preferred embodiment of the present invention.
Fig. 5 is the flow chart according to the electric power system method of operation of a preferred embodiment of the present invention.
Fig. 6 is another flow chart according to the electric power system method of operation of a preferred embodiment of the present invention.
101: conventional power source supply 102,104,204,205: switch
103: charger 105,203: battery
106,202: system 201: far-end control power supply unit
210: far-end control circuit
211,215,216,217,218,219,220: resistance
212,213,403: operational amplifier
214: select circuit 221,222: diode
232: the second ends of 231: the first ends
233,235: first input end 234,236: the second inputs
301: Schottky diode 302,401:PMOS transistor
402: logical circuit
501: detect the charging current of battery to export first control signal by first operational amplifier
502: detect the voltage of battery to export second control signal by second operational amplifier
503: utilize to select circuit to export voltage junior in the middle of first control signal and second control signal, as the far-end control signal and the feed-in far-end is controlled power supply unit
504: adjust the voltage of far-end control power supply unit according to the far-end control signal, make the voltage of the voltage of far-end control power supply unit and battery close
602: embedded controller can judge whether battery needs charging
603: embedded controller is set charging control signal and is charged state not, and the 3rd operational amplifier will drive second switch and present unidirectional conducting
604: judge whether system load surpasses the peak power output of far-end control power supply unit
605: far-end control power supply unit can supply power to system, but can be to battery charge
606: far-end control power supply unit is supplied with peak power output to system, and by the electric power of the required deficiency of battery feed system
607: it is charged state that embedded controller is set charging control signal, and second switch is set at unlatching, makes second switch present two-way admittance
608: judge whether system load surpasses the peak power output of far-end control power supply unit
609: far-end control power supply unit can supply power to system, and to battery charge
610: far-end control power supply unit can be supplied with peak power output to system, and battery provides system required not enough electric power
Ccs: charging control signal fcs: first control signal
Fes: far-end control signal G: gate
GND: earthed voltage scs: second control signal
VREF1: the first reference voltage VREF2: second reference voltage
Embodiment
Fig. 2 is the circuit block diagram according to the electric power system with far-end control circuit of a preferred embodiment of the present invention.It comprises far-end control power supply unit 201, system 202, battery 203, first switch 204, second switch 205 and far-end control circuit 210.Far-end control circuit 210 comprises first resistance 211, first operational amplifier 212, second operational amplifier 213, selects circuit 214, second resistance 215, the 3rd resistance 216, the 4th resistance 217, the 5th resistance 218, the 6th resistance 219 and the 7th resistance 220.
Wherein, first end 231 of second switch 205 sees through first resistance, 211 coupling systems 202, and first end 231 of second switch 205 also sees through first resistance 211 and first switch 204 in regular turn and couples far-end control power supply unit 201, and second end 232 of second switch 205 couples battery 203.First switch 204 presents conducting when far-end control power supply unit 201 exists, otherwise closes.Second switch 205 receives the charging control signal ccs from an embedded controller (do not have among Fig. 2 and show), and if charging control signal ccs is that charged state then presents two-way admittance, if charging control signal ccs for charged state not then along 202 direction presents unidirectional conducting from battery 203 to system.
Above-mentioned charging control signal ccs is provided by the information of embedded controller according to battery 203, the information of battery 203 can be electric weight, electric current, temperature, voltage etc. one of them, with the information is that electric weight is an example, the preset value of for example setting the electric weight of remaining battery is 95%, if the electric weight of battery 203 is lower than 95%, then charging control signal ccs is a charged state, otherwise charging control signal ccs is charged state not.The first above-mentioned state be logical zero and logical one one of them, and charged state is not that logical zero and logical one wherein are different from charged state person.
First operational amplifier 212 utilizes the pressure drop (voltage drop) at first resistance, 211 two ends to flow to the charging current of battery 203 with detecting, concrete way is first end 231 that the negative pole end 233 of first operational amplifier 212 is coupled first resistance 211 and second switch 205 through second resistance 215, and the negative pole end 233 of first operational amplifier 212 also sees through the 3rd resistance 216 and couples the first reference voltage VREF1, the positive terminal 234 of first operational amplifier 212 sees through the 4th resistance 217 and couples first resistance 211 and system 202, and second input 234 of first operational amplifier 212 also couples earthed voltage GND through the 5th resistance 218.Thus, first operational amplifier 212 just can be detected the charging current that flows to battery 203, and exports the first control signal fcs according to the result of detecting.Yet in the present embodiment, first operational amplifier 212 also non-limitingly sees through resistance and above-mentioned coupling mode is detected the charging current that flows to battery 203.
Second operational amplifier 213 is the voltage that is used for detecting battery 203, concrete way is that the positive terminal 235 with second operational amplifier 213 sees through the 6th resistance 219 and couples battery 203, and the positive terminal 235 of second operational amplifier 213 also sees through the 7th resistance 220 and couples earthed voltage GND, and the negative pole end 236 of second operational amplifier 213 couples the second reference voltage VREF2, and second operational amplifier 213 is exported the second control signal scs according to the result of detecting.Yet in the present embodiment, second operational amplifier 213 is also non-limiting to see through the voltage that resistance and above-mentioned coupling mode are detected battery 203.
Select circuit 214 to receive the first control signal fcs and the second control signal scs, and export voltage junior in the middle of these two control signals, control the voltage of power supply unit 201 as far-end control signal fes to adjust far-end, make that the voltage of far-end control power supply unit 201 is close with the voltage of battery 203, and control battery charge and be no more than preset value.Thus, electric power system with far-end control circuit of the present invention just can reach and make 201 power supplies of far-end control power supply unit to system 202 and to battery charge, when system's 202 loads are not more than far-end control power supply unit 201, then far-end control power supply unit 201 is powered to system 202 simultaneously with battery 203, and the electric power system with far-end control circuit of the present invention also can be according to the electric weight of battery 203 conducting second switch 205 in time, so that battery 203 is done charge or discharge.
In the present embodiment, above-mentioned selection circuit 214 comprises first diode 221 and second diode 222.Wherein first diode 221 receives the first control signal fcs with negative electrode, and second diode 222 receives the second control signal scs with negative electrode, and the anode of these two diodes all is coupled to a contact, fes is to far-end control power supply unit 201 for this contact output far-end control signal, so that far-end control power supply unit 201 can be adjusted the voltage of output voltage and battery 203 according to far-end control signal fes is close, and controls battery charge and be no more than preset value.Yet, the selection that above-mentioned selection circuit 214 and non-limiting use diode are the first control signal fcs and the second control signal scs, haveing the knack of this skill person can change according to actual needs.
Fig. 3 is the circuit diagram 300 according to the second switch 205 of a preferred embodiment of the present invention.Please according to the explanation needs and with reference to Fig. 3 and Fig. 2.Second switch 205 optionally comprises Schottky diode 301 and PMOS transistor 302.Wherein, the anode of Schottky diode 301 is coupled to first end 231 of second switch 205, the negative electrode of Schottky diode 301 couples between second end 232 of second switch 205, if the anode voltage of Schottky diode 301 is greater than cathode voltage, then battery 203 sees through 202 power supplies of 301 pairs of systems of Schottky diode.
Fig. 4 is another circuit diagram 400 according to the second switch 205 of a preferred embodiment of the present invention.Please according to the explanation needs and with reference to Fig. 4 and Fig. 2.Fig. 4 comprises PMOS transistor 401, logical circuit 402 and the 3rd operational amplifier 403.Wherein, PMOS transistor 401 is coupled to first end 231 of second switch 205 with source electrode, is coupled to second end 232 of second switch 205 with drain.402 couples of charging control signal ccs of logical circuit carry out logical operation, then the charging control signal ccs after the computing is provided to the gate of PMOS transistor 401, make PMOS transistor 401 can determine whether conducting according to the charging control signal ccs that draws through logical circuit 402 computings.In the present embodiment, logical circuit 402 is an inverter.
The 3rd operational amplifier 403 receives the voltage signal of the drain of PMOS transistor 401 with negative input end (inverting input), receive the voltage signal of the source electrode of PMOS transistor 401 with positive input terminal (non-inverting input), thus, the 3rd operational amplifier 403 just can be detected the source electrode of PMOS transistor 401 and the voltage between the drain, and provide the gate that outputs signal to PMOS transistor 401, make PMOS transistor 401 when charging control signal ccs is logical zero (being charged state not at this), can utilize this output signal to keep above-mentioned voltage not to be higher than the predeterminated voltage (is 33mV at this embodiment) of second switch 205, therefore if the load moment raising of system 202, the running meeting of second switch 205 is as same Schottky diode (Schottky diode) at this moment, and make the pressure drop meeting of two ends of second switch 205 maintain 33mV, so will make battery 203 when power supply, produce less power loss (power loss), and make second switch 205 can not cause damage, and also solved the heat dissipation problem of second switch 205 simultaneously because of too high power loss.
Fig. 5 is the flow chart according to the electric power system method of operation of a preferred embodiment of the present invention.Please according to the explanation needs and with reference to Fig. 5 and Fig. 2.This electric power system at first is to detect the charging current of batteries 203 to export the first control signal fcs (as the step 501 of Fig. 5) by first operational amplifier 212, then relend by second operational amplifier 213 and detect the voltage of batteries 203 to export the second control signal scs (as the step 502 of Fig. 5), utilize then and select circuit 214 output first control signal fcs and the central voltage junior of the second control signal scs, as far-end control signal fes and feed-in far-end control power supply unit 201 (as the step 503 of Fig. 5), then adjust the voltage of far-end control power supply unit 201 again according to far-end control signal fes, make the voltage of far-end control power supply unit 201 and the voltage close (as the step 504 of Fig. 5) of battery 203, and the control battery charge is no more than preset value.
The described electric power system of Fig. 5 more comprises a switch (be Fig. 2, Fig. 3 or second switch 205 shown in Figure 4, so the method for operation of this switch and circuit do not repeat them here, and in the following description, claim that all this switch is a second switch 205).Second switch 205 can be illustrated by Fig. 6 with far-end control power supply unit 201 and battery 203 operative relationship each other.
Fig. 6 is another flow chart according to the electric power system method of operation of a preferred embodiment of the present invention.Please according to the explanation needs and with reference to Fig. 6 and Fig. 2.At first, the embedded controller (EC) of this electric power system can judge whether battery 203 needs charging (step 602 as shown in Figure 6).Embedded controller is that judge whether according to the information of battery 203 (information be for electric weight, electric current, temperature, voltage etc. one of them) need (with information be to be that electric weight is an example with battery 203 chargings, the preset value of for example setting battery 203 remaining electric weight is 95%, if battery 203 remaining electric weight are lower than 95%, then embedded controller can be judged as and battery 203 need be charged).At this moment, if embedded controller judges that battery 203 is not for needing charging, then embedded controller is set charging control signal ccs and is charged state not, and the 3rd operational amplifier 403 will drive second switch 205 and present unidirectional conducting (step 603 as shown in Figure 6), judge then whether system's 202 loads surpass the peak power output (step 604 as shown in Figure 6) of far-end control power supply unit 201, if system's 202 loads are no more than the peak power output of far-end control power supply unit 201, then far-end control power supply unit 201 can supply power to system 202, but can be to battery 203 chargings (step 605 as shown in Figure 6).If system's 202 loads surpass the peak power output of far-end control power supply unit 201, then far-end control power supply unit 201 is supplied with peak power outputs to system 202, and by the electric power (step 606 as shown in Figure 6) of battery 203 feed systems 202 required deficiencies.At this moment, second switch 205 is driven by the 3rd operational amplifier 403, presents low forward pressure drop, reaches unidirectional conducting and low-loss characteristic.
Yet, if embedded controller is judged when battery 203 needs charging, it is charged state that then embedded controller is set charging control signal ccs, and second switch 205 is set at unlatching, make second switch 205 present two-way admittance (step 607 as shown in Figure 6), judge then whether system's 202 loads surpass the peak power output (step 608 as shown in Figure 6) of far-end control power supply unit 201, if system's 202 loads are no more than the peak power output of far-end control power supply unit 201, then far-end control power supply unit 201 can supply power to system 202, and to battery 203 chargings (step 609 as shown in Figure 6).
When if the load of system 202 surpasses the peak power output of far-end control power supply unit 201, this moment is because the load of system 202 has surpassed the peak power output of far-end control power supply unit 201, thereby the voltage level of the output voltage of far-end control power supply unit 201 is descended, there is not unnecessary electric power to charge to battery 203, therefore far-end control this moment power supply unit 201 can stop battery 203 chargings (step 610 as shown in Figure 6), and far-end control power supply unit 201 still can be supplied with peak power output to system 202, and battery 203 also still can provide system 202 required not enough electric power, and this moment, battery was not in charged state but in discharge condition.
In sum, the present invention detects the charging current of battery and the voltage of battery respectively for adopting two operational amplifiers, and one of them output of selecting two operational amplifiers feeds back to far-end control power supply unit, to adjust the voltage of far-end control power supply unit, make that the voltage of far-end control power supply unit is close with the voltage of battery, and control battery charge and be no more than preset value.Therefore, electric power system of the present invention and electric power system method of operation can allow simultaneously system to be powered by far-end control power supply unit and battery, if and through suitably design, the output voltage that then can make far-end control power supply unit is done to change in the interval of 9～13 volts (volt) and is leveled off to the output voltage of battery, so can satisfy the requirement of the notion of the Narrow VDC2 motion that Intel Company releases, and make that also the volume of far-end control power supply unit can Flexible Design.
In addition, if the switch that is coupled to battery-end among the present invention is for adopting operational amplifier and PMOS transistor, and make operational amplifier at charging control signal during for charged state not, with the voltage between two input detecting PMOS transistor sources and the drain, operational amplifier provides and outputs signal to the transistorized gate of PMOS then, the pressure drop of unidirectional conducting of this output signal controllable current (being flowed out to the direction of system by battery) and conducting is not higher than the predeterminated voltage of switch, so also not having switch is burnt, thereby the problem that causes battery and far-end control power supply unit to power to system simultaneously.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limiting the present invention, anyly has the knack of this skill person, without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking the appending claims person of defining.
Claims (27)
1, a kind of electric power system with far-end control circuit is characterized in that this far-end control circuit comprises:
One first resistance is coupled between a far-end control power supply unit and the battery;
One first operational amplifier couples this first resistance, in order to the electric current of detecting this first resistance to export one first control signal;
One second operational amplifier couples this battery, in order to the voltage of detecting this battery to export one second control signal; And
One selects circuit, be coupled between this first operational amplifier, this second operational amplifier and this far-end control power supply unit three, in order to export voltage junior in the middle of this first control signal and this second control signal, to adjust the voltage of this far-end control power supply unit, make the voltage of the voltage of this far-end control power supply unit and this battery close as a far-end control signal.
2, electric power system according to claim 1 is characterized in that wherein this far-end control signal more is no more than a preset value in order to the charging current of controlling this battery.
3, electric power system according to claim 1 is characterized in that this first operational amplifier wherein is respectively coupled to the two ends of this first resistance with two inputs.
4, electric power system according to claim 3 is characterized in that wherein this far-end control circuit more comprises:
One second resistance is coupled to this first resistance and this battery with an end, is coupled to the negative pole end of this first operational amplifier with the other end;
One the 3rd resistance is coupled between the negative pole end of one first reference voltage and this first operational amplifier;
One the 4th resistance is coupled to this first resistance and this far-end control power supply unit with an end, is coupled to the positive terminal of this first operational amplifier with the other end; And
One the 5th resistance is coupled to the positive terminal of this first operational amplifier with an end, with other end ground connection.
5, electric power system according to claim 1 is characterized in that this second operational amplifier wherein is coupled to this first resistance and this battery with the positive terminal of this second operational amplifier, receives one second reference voltage with the negative pole end of this second operational amplifier.
6, electric power system according to claim 5 is characterized in that wherein this far-end control circuit more comprises:
One the 6th resistance is coupled to this first resistance and this battery with an end, is coupled to this positive terminal of this second operational amplifier with the other end; And
One the 7th resistance is coupled to this positive terminal of this second operational amplifier with an end, with other end ground connection.
7, electric power system according to claim 1 is characterized in that wherein this selection circuit comprises:
One first diode receives this first control signal with negative electrode; And
One second diode receives this second control signal with negative electrode; Wherein
The anode of above-mentioned two diodes all is coupled to a contact, and this contact is exported this far-end control signal.
8, electric power system according to claim 1 is characterized in that it more comprises:
One first switch is coupled to this far-end control power supply unit with an end, is coupled to this battery and a system with the other end, if there is then conducting in this far-end control power supply unit, otherwise ends.
9, electric power system according to claim 8 is characterized in that it more comprises:
One second switch, be coupled to this first resistance and this system with first end, be coupled to this battery with second end, receive a charging control signal, if this charging control signal is a then two-way admittance of a charged state, if this charging control signal is a not then unidirectional conducting of the direction along this battery to this system of charged state.
10, electric power system according to claim 9, it is characterized in that wherein this charged state be logical zero and logical one one of them, this not charged state be that logical zero and logical one wherein are different from this charged state person.
11, electric power system according to claim 9 is characterized in that wherein this charging control signal is from an embedded controller, and this embedded controller provides this charging control signal according to the information of this battery.
12, electric power system according to claim 11 is characterized in that the information of this battery wherein is one of them of electric weight, electric current, temperature and voltage.
13, electric power system according to claim 9 it is characterized in that wherein then this charging control signal is this charged state if the electric weight of this battery is lower than one first preset value, otherwise this charging control signal is this not charged state.
14, electric power system according to claim 9 is characterized in that wherein this second switch comprises:
One Xiao's based diode is coupled between first end and second end of this second switch; And
One PMOS transistor is coupled to first end of this second switch with source electrode, is coupled to second end of this second switch with drain electrode, according to this charging control signal and conducting or end.
15, electric power system according to claim 9 is characterized in that wherein this second switch comprises:
One PMOS transistor is coupled to first end of this second switch with source electrode, is coupled to second end of this second switch with drain electrode;
One logical circuit carries out a logical operation to this charging control signal, provides the transistorized grid to this PMOS with this charging control signal after the computing; And
One the 3rd operational amplifier, at this charging control signal is that this is not during charged state, with two inputs detect this PMOS transistor source and the drain electrode between voltage, and providing one to output signal to the transistorized grid of this PMOS, this output signal is controlled this PMOS transistor and is not higher than a predeterminated voltage by battery to the folk prescription of this system to conducting and conduction voltage drop.
16, electric power system according to claim 15 is characterized in that wherein this logical circuit comprises an inverter.
17, a kind of electric power system method of operation in order to control a power supply unit and powered battery to a system by a far-end, is characterized in that this electric power system method of operation may further comprise the steps:
The charging current of detecting this battery by one first operational amplifier is to export one first control signal;
The voltage of detecting this battery by one second operational amplifier is to export one second control signal;
Utilize one to select circuit to export voltage junior in the middle of this first control signal and this second control signal, as a far-end control signal and this far-end of feed-in is controlled power supply unit; And
Adjust the voltage of this far-end control power supply unit according to this far-end control signal, make the voltage of the voltage of this far-end control power supply unit and this battery close.
18, electric power system method of operation according to claim 17 is characterized in that it comprises that more the charging current of controlling this battery is no more than a preset value.
19, electric power system method of operation according to claim 17, it is characterized in that wherein this electric power system more comprises a switch, this switch is coupled to this far-end control power supply unit and this system with first end, be coupled to this battery with second end, receive a charging control signal, if this charging control signal is a then two-way admittance of a charged state, if this charging control signal is a not then unidirectional conducting of the direction along this battery to this system of charged state.
20, electric power system method of operation according to claim 19, it is characterized in that wherein this charged state be logical zero and logical one one of them, this not charged state be that logical zero and logical one wherein are different from this charged state person.
21, electric power system method of operation according to claim 20 is characterized in that wherein this charging control signal is from an embedded controller, and this embedded controller provides this charging control signal according to an information of this battery.
22, electric power system method of operation according to claim 21 is characterized in that the information of this battery wherein is one of them of electric weight, electric current, temperature and voltage.
23, electric power system method of operation according to claim 19 it is characterized in that wherein then this charging control signal is this charged state if the electric weight of this battery is lower than a preset value, otherwise this charging control signal is this not charged state.
24, electric power system method of operation according to claim 23 is characterized in that it more comprises:
If the load of this system surpasses the peak power output of this far-end control power supply unit, then supply with peak power output to this system, and supply with the required not enough electric power of this system by this battery by this far-end control power supply unit;
If the electric weight of this battery is higher than the peak power output that the load of this preset value and this system does not surpass this far-end control power supply unit, then this far-end control power supply unit supplies power to this system, and this battery does not charge; And
If the electric weight of this battery is lower than the peak power output that the load of this preset value and this system does not surpass this far-end control power supply unit, then this far-end control power supply unit supplies power to this system, and this battery that charges.
25, electric power system method of operation according to claim 24 is characterized in that it more comprises:
If the electric weight of this battery is lower than the peak power output that the load of this preset value and this system surpasses this far-end control power supply unit, this far-end control power supply unit this battery that stops to charge then.
26, electric power system method of operation according to claim 20, it is characterized in that wherein this switch comprises a PMOS transistor, this PMOS transistor is coupled to first end of this switch with source electrode, is coupled to second end of this switch with drain electrode, and this electric power system method of operation more comprises:
This charging control signal is carried out a logical operation, provide transistorized grid to this PMOS with this charging control signal after the computing; And
At this charging control signal is that this is not during charged state, according to the voltage between this PMOS transistor source and the drain electrode, provide one to output signal to the transistorized grid of this PMOS by one the 3rd operational amplifier, this output signal is controlled this PMOS transistor and is not higher than a predeterminated voltage by battery to the folk prescription of system to conducting and conduction voltage drop.
27, electric power system method of operation according to claim 26 is characterized in that wherein this logical operation comprises an anti-phase computing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101404046A CN100574043C (en) | 2006-09-30 | 2006-09-30 | Electric power system and electric power system method of operation with far-end control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101404046A CN100574043C (en) | 2006-09-30 | 2006-09-30 | Electric power system and electric power system method of operation with far-end control circuit |
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| CN101154825A CN101154825A (en) | 2008-04-02 |
| CN100574043C true CN100574043C (en) | 2009-12-23 |
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| WO2020119817A1 (en) * | 2018-12-14 | 2020-06-18 | Huawei Technologies Co., Ltd. | Shared bootstrap capacitor system and method |
| CN112332498A (en) * | 2020-11-24 | 2021-02-05 | 南京微盟电子有限公司 | Multi-battery charging and discharging management circuit for switch type voltage stabilizer |
| WO2024026600A1 (en) * | 2022-08-01 | 2024-02-08 | 中兴电工机械股份有限公司 | Method for realizing charging/discharging processing of secondary battery by fuel cell system |
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