CN1614440A - Voltage measuring circuit of single accumulator - Google Patents
Voltage measuring circuit of single accumulator Download PDFInfo
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- CN1614440A CN1614440A CN 200310108482 CN200310108482A CN1614440A CN 1614440 A CN1614440 A CN 1614440A CN 200310108482 CN200310108482 CN 200310108482 CN 200310108482 A CN200310108482 A CN 200310108482A CN 1614440 A CN1614440 A CN 1614440A
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A circuit for measuring voltage of single storage battery is composed of voltage scanning circuit including multisection of single storage battery, two positive and negative accurate reference voltage sources and optical relay scanning switch, and rectifying circuit being an inverse input summation circuit.
Description
Technical field
The present invention relates to a kind of device that is used for measuring voltage, particularly relate to a kind of metering circuit that is used for precision measurement cell batteries voltage.
Background technology
In electric motor car (EV), hybrid electric vehicle (HEV), fuel cell car (FCV) and some uninterruptible power systems, all to use accumulator.Because it is the voltage of cell batteries is very low, generally below 5V, often that the series connection of more piece cell batteries is as a whole to externally fed in the practical application.Owing to reasons such as technology, costs, there are differences inevitably between each cell batteries, the too high or too low integral body that all can damage accumulator of cell batteries terminal voltage may cause accumulator explosion or other fault to jeopardize user's statement safety.In order to guarantee to use safely and reliably accumulator, must accurately measure every joint monomer battery voltage.
Summary of the invention
The purpose of this invention is to provide a kind of simple in structure, tension measuring circuit that cost is low to realize high-acruracy survey to cell batteries voltage.
To achieve these goals, the technical solution used in the present invention: it is made up of voltage scanning circuit and rectification circuit two parts, more piece cell batteries to be measured and two positive and negative accurate reference voltage are in series in the voltage scanning circuit, the cell batteries that wherein is odd-numbered is respectively by being the switch of even-numbered and negative accurate reference voltage formation loop, the cell batteries of the even-numbered switch by odd-numbered respectively is connected with accurate reference voltage and ground connection formation loop, above-mentioned two loops respectively be to save amplifiers by two, the precise rectification circuit that commutation diode and resistance are formed is connected; Output terminal after rectification is connected through the input end of output through a feedback parallel resistance and precise rectification circuit, is connected with the A/D terminal of microprocessor through another amplifier.
The invention has the beneficial effects as follows that the present invention is that the tension measuring circuit of feature has been realized high-accuracy measurement to cell batteries voltage with lower cost by a kind of the correction with scanning, floating ground, voltage reference.In each measuring period of predefined, invent described circuit and can test the voltage of each cell batteries in each electric battery one by one, and the magnitude of voltage of positive and negative two standard of precision voltage of foundation, the cell batteries magnitude of voltage that each test obtains is calibrated, float with circuit and disturb to eliminate temperature, fully satisfied battery management system to measuring voltage in precision, temporal demand, for the exploitation high precision, cheaply battery management system provide may.In battery applications increasingly extensive today, for its marketization, produce in enormous quantities better security performance guarantee is provided.
Description of drawings
Fig. 1 is a cell batteries tension measuring circuit schematic diagram.
Embodiment
Below in conjunction with accompanying drawing 1, the present invention is described in further detail: the cell batteries tension measuring circuit, it is made up of voltage scanning circuit and rectification circuit two parts, more piece cell batteries B to be measured in the voltage scanning circuit
1-Bn and two positive and negative accurate reference voltage V1, V2 is in series, wherein be the cell batteries B1 of odd-numbered, B3, B5 ... Bn is respectively by being the switch S 2 of even-numbered, S4, S6, Sn+1, Sn+3 and negative accurate reference voltage V2 constitute the loop, the cell batteries B2 of even-numbered, B4, B6, Bn-1 passes through the switch S 1 of odd-numbered respectively, S3, S5, Sn, Sn+2 is connected with accurate reference voltage V1 and ground connection constitutes the loop, above-mentioned two loops respectively be one by amplifier A1, A2, diode D1, the precise rectification circuit that D2 and resistance R 1-R6 are formed by connecting is connected; Output end vo l after diode D2 rectification, is connected with the A/D terminal of microprocessor through another amplifier A2 after the input end Vin of parallel resistance R4 and precise rectification circuit is connected through resistance in series R3.
Be provided with the zener diode D3 of a ground connection between described reverser A2 from the above mentioned and the voltage output end Vout, too high to prevent Vout, promptly, avoid causing device failure above the reference voltage of A/D.Scanning switch S1～Sn+3 is the PHOTOMOS optical relay, as shown in Figure 1.
With 7 batteries is one group embodiment, and principle of work of the present invention is described.According to actual conditions, every Battery pack number can be adjusted as required.Circuit dotted line right half part is anti-phase input summing circuit among Fig. 1, and adduction is anti-phase mutually with Vol to realize Vin, so output end voltage is the absolute value of input voltage, owing to R1=R3=R4=R5=0.5 * R2, and when Vin＞0, Vol=-2Vin; When Vin＜0, Vol=0.Output terminal voltage stabilizing diode D3 prevents Vout too high (reference voltage that surpasses A/D), avoids causing components from being damaged, after precise rectification circuit is asked absolute value to the voltage that samples, directly gives the A/D input end of microprocessor.Switch S 1～S10 in the accompanying drawing 1 selects the PHOTOMOS optical relay for use, and the advantage of this electronic switch is to use long volume of life-span little.The signal that drives these switches is from two general 3-8 code translators.The principle of work of above-mentioned precise rectification circuit obtains under ideal state, in the circuit practical work process, because be subjected to the influence of environmental parameters such as temperature, the resistance value in the circuit can change, make between the voltage measuring value of cell batteries and the actual value and produce error.In order to reduce this class error, therefore, the present invention adds accurate reference voltage V1 and V2 (requirement of standard of precision voltage is that magnitude of voltage does not change with environmental parameter substantially) in each battery module, the magnitude of voltage of survey cell batteries is demarcated.Because for precise rectification circuit, the current path path of Vin＞0 and Vin＜0 o'clock is different, calibrates respectively so added positive and negative two standard of precision voltage.When circuit was started working, at first Closing Switch S10, S9 had Vin=-V2＜0, established to obtain to such an extent that measured value is VMv2 this moment, can bear the calibration coefficient a=VMv2/Vv2 of benchmark.Next disconnect S10, closed S8 is added to the input end of precise rectification circuit with reference voltage V 2, this moment Vin=Vv1＞0, measured value is VMv1, obtains the calibration coefficient b=VMv1/Vv1 of positive benchmark.Control other switch in this manner, the voltage of B7-B1 accumulator is added on the precise rectification circuit successively, obtaining measured value respectively is VMB7, VMB6...VMB1.From accompanying drawing as can be known, with what positive voltage was added to the precise rectification circuit input end V1, B6, B4, B2 arranged; With what negative voltage was added to the precision rectifying current input terminal V2, B7, B5, B3, B1 arranged.So calibrated voltage measuring value is: VTB7=VMB7/a, VTB6=VMB6/b, VTB5=VMB5/a, VTB4=VMB4/b, VTB3=VMB3/a, VTB2=VMB2/b, VTB1=VMB1/a.Considering that the terminal voltage of cell batteries and the temperature variation of accumulator itself are not very fast, can 100ms be the cycle, and every the one-period run-down, this scan mode can satisfy actual needs.When management system was not worked, switch S 10-S1 all disconnected, so there is not the problem of leakage current.Whole invention need not be added extra additional device, and circuit is succinct, clear, and cost is very low, can realize the high-acruracy survey to cell batteries voltage.
Claims (3)
1, a kind of cell batteries tension measuring circuit is characterized in that, it is made up of voltage scanning circuit and rectification circuit two parts, more piece cell batteries B to be measured in the voltage scanning circuit
1-Bn and two positive and negative accurate reference voltage V1, V2 is in series, wherein be the cell batteries B1 of odd-numbered, B3, B5 ... Bn is respectively by being the switch S 2 of even-numbered, S4, S6, Sn+1, Sn+3 and negative accurate reference voltage V2 constitute the loop, the cell batteries B2 of even-numbered, B4, B6, Bn-1 passes through the switch S 1 of odd-numbered respectively, S3, S5, Sn, Sn+2 is connected with accurate reference voltage V1 and ground connection constitutes the loop, above-mentioned two loops respectively be one by amplifier A1, diode D1, D2 and resistance R 1-R4, the precise rectification circuit that R6 forms is connected; The output end vo 1 of precise rectification circuit through output through resistance in series R3 after the input end Vin of parallel resistance R4 and precise rectification circuit is connected, be connected with the A/D terminal of microprocessor through another amplifier A2.
2. a kind of cell batteries tension measuring circuit according to claim 1 is characterized in that the scanning switch S1～Sn+3 in the described voltage scanning circuit is a PHOTOMOS optical relay.
3. a kind of cell batteries tension measuring circuit according to claim 1 is characterized in that being provided with between described amplifier A2 and the voltage output end Vout zener diode D3 of a ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310108482 CN1614440A (en) | 2003-11-07 | 2003-11-07 | Voltage measuring circuit of single accumulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310108482 CN1614440A (en) | 2003-11-07 | 2003-11-07 | Voltage measuring circuit of single accumulator |
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| CN1614440A true CN1614440A (en) | 2005-05-11 |
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| CN 200310108482 Pending CN1614440A (en) | 2003-11-07 | 2003-11-07 | Voltage measuring circuit of single accumulator |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102207529A (en) * | 2010-03-31 | 2011-10-05 | 比亚迪股份有限公司 | Voltage sampling device and method capable of judging sampling line break of battery pack |
| CN102269775A (en) * | 2011-05-16 | 2011-12-07 | 钟小梅 | Low-cost and high-precision voltage measuring system and method |
| CN102412425A (en) * | 2011-09-23 | 2012-04-11 | 奇瑞汽车股份有限公司 | Method and device for managing batteries |
| CN102426339A (en) * | 2011-09-03 | 2012-04-25 | 镇江恒驰科技有限公司 | Voltage collecting circuit for monomer batteries of battery pack |
| CN102792549A (en) * | 2010-03-08 | 2012-11-21 | 三洋电机株式会社 | Battery control device, battery system, electric vehicle, mobile body, electric power storage device, and power supply device |
| CN103293355A (en) * | 2012-02-24 | 2013-09-11 | 东莞钜威新能源有限公司 | Voltage measuring circuit |
| CN104237796A (en) * | 2013-06-20 | 2014-12-24 | 通用汽车环球科技运作有限责任公司 | Systems and methods for detecting leakage paths in a battery sensing circuit |
| CN104375050A (en) * | 2014-10-27 | 2015-02-25 | 北京新能源汽车股份有限公司 | High-voltage wiring harness conductivity automatic-testing device of electric vehicle |
| CN104515929A (en) * | 2014-10-27 | 2015-04-15 | 北京新能源汽车股份有限公司 | Device for automatically testing continuity of high-voltage connector of electromobile high-voltage control box |
| CN107402347A (en) * | 2017-08-28 | 2017-11-28 | 广州子锐机器人技术有限公司 | A kind of industrial robot fault intelligent detection device |
| CN107741570A (en) * | 2017-11-16 | 2018-02-27 | 常州机电职业技术学院 | A kind of detection method of serial lithium battery group |
| CN108933459A (en) * | 2018-07-26 | 2018-12-04 | 安徽锐能科技有限公司 | For measuring the circuit of the monomer voltage of battery pack |
| CN111123130A (en) * | 2019-12-25 | 2020-05-08 | 北京空间飞行器总体设计部 | Satellite lithium ion battery voltage telemetering health on-orbit autonomous diagnosis method |
| CN111596247A (en) * | 2020-01-13 | 2020-08-28 | 国网天津市电力公司 | Voltage detection circuit and method |
| CN111707949A (en) * | 2020-05-26 | 2020-09-25 | 联创汽车电子有限公司 | Voltage detection device and voltage detection method |
| CN113884931A (en) * | 2021-10-28 | 2022-01-04 | 傲普(上海)新能源有限公司 | Time drift compensation method of BMS (battery management system) |
-
2003
- 2003-11-07 CN CN 200310108482 patent/CN1614440A/en active Pending
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102792549A (en) * | 2010-03-08 | 2012-11-21 | 三洋电机株式会社 | Battery control device, battery system, electric vehicle, mobile body, electric power storage device, and power supply device |
| CN102207529A (en) * | 2010-03-31 | 2011-10-05 | 比亚迪股份有限公司 | Voltage sampling device and method capable of judging sampling line break of battery pack |
| CN102269775A (en) * | 2011-05-16 | 2011-12-07 | 钟小梅 | Low-cost and high-precision voltage measuring system and method |
| CN102426339A (en) * | 2011-09-03 | 2012-04-25 | 镇江恒驰科技有限公司 | Voltage collecting circuit for monomer batteries of battery pack |
| CN102412425A (en) * | 2011-09-23 | 2012-04-11 | 奇瑞汽车股份有限公司 | Method and device for managing batteries |
| CN103293355B (en) * | 2012-02-24 | 2016-06-08 | 东莞钜威新能源有限公司 | A kind of tension measuring circuit |
| CN103293355A (en) * | 2012-02-24 | 2013-09-11 | 东莞钜威新能源有限公司 | Voltage measuring circuit |
| CN104237796B (en) * | 2013-06-20 | 2017-10-17 | 通用汽车环球科技运作有限责任公司 | System and method for detecting the leakage paths in battery sensing circuit |
| CN104237796A (en) * | 2013-06-20 | 2014-12-24 | 通用汽车环球科技运作有限责任公司 | Systems and methods for detecting leakage paths in a battery sensing circuit |
| CN104375050A (en) * | 2014-10-27 | 2015-02-25 | 北京新能源汽车股份有限公司 | High-voltage wiring harness conductivity automatic-testing device of electric vehicle |
| CN104515929A (en) * | 2014-10-27 | 2015-04-15 | 北京新能源汽车股份有限公司 | Device for automatically testing continuity of high-voltage connector of electromobile high-voltage control box |
| CN107402347A (en) * | 2017-08-28 | 2017-11-28 | 广州子锐机器人技术有限公司 | A kind of industrial robot fault intelligent detection device |
| CN107741570A (en) * | 2017-11-16 | 2018-02-27 | 常州机电职业技术学院 | A kind of detection method of serial lithium battery group |
| CN108933459B (en) * | 2018-07-26 | 2023-05-09 | 安徽锐创新能源技术有限公司 | Circuit for measuring cell voltage of battery pack |
| CN108933459A (en) * | 2018-07-26 | 2018-12-04 | 安徽锐能科技有限公司 | For measuring the circuit of the monomer voltage of battery pack |
| CN111123130A (en) * | 2019-12-25 | 2020-05-08 | 北京空间飞行器总体设计部 | Satellite lithium ion battery voltage telemetering health on-orbit autonomous diagnosis method |
| CN111596247B (en) * | 2020-01-13 | 2023-04-11 | 国网天津市电力公司 | Voltage detection circuit and method |
| CN111596247A (en) * | 2020-01-13 | 2020-08-28 | 国网天津市电力公司 | Voltage detection circuit and method |
| CN111707949A (en) * | 2020-05-26 | 2020-09-25 | 联创汽车电子有限公司 | Voltage detection device and voltage detection method |
| CN113884931A (en) * | 2021-10-28 | 2022-01-04 | 傲普(上海)新能源有限公司 | Time drift compensation method of BMS (battery management system) |
| CN113884931B (en) * | 2021-10-28 | 2023-06-23 | 傲普(上海)新能源有限公司 | Time drift compensation method of BMS system |
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