CN1079604C - Active protection apparatus for charging of battery - Google Patents
Active protection apparatus for charging of battery Download PDFInfo
- Publication number
- CN1079604C CN1079604C CN99114068A CN99114068A CN1079604C CN 1079604 C CN1079604 C CN 1079604C CN 99114068 A CN99114068 A CN 99114068A CN 99114068 A CN99114068 A CN 99114068A CN 1079604 C CN1079604 C CN 1079604C
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- CN
- China
- Prior art keywords
- battery
- control circuit
- microprocessor control
- field effect
- effect transistor
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The present invention provides an active charging protector for an accumulator, which is composed of a microprocessor control circuit and a field effect transistor, and is characterized in that the field effect transistor is used as the charging and discharging loop switch of the accumulator; the source electrode S of the field effect transistor is connected with the positive end of an accumulator box; a drain electrode D is connected with the positive pole of an accumulator set E; a gate G is connected with the output end 2 of the microprocessor control circuit; the microprocessor control circuit controls the field effect transistor to be switched on and off according to the charging states of the accumulator; the charging protector and the accumulator are arranged in the accumulator box to form a whole.
Description
The invention belongs to the battery charge protection class; be in a kind of battery case that is attached to nickel-hydrogen accumulator or lithium-ions battery specifically; when charge in batteries, can detect charging current, voltage, temperature rise, charging interval and the number of times of battery; can cut off charge circuit automatically behind the sufficient electric weight of storage battery, prevent the active battery charge protection circuit arrangement of overcharge of a battery.
On portable electric appts such as video camera, risen at present big capacity, in light weight, the nickel-hydrogen accumulator of non-environmental-pollution and the trend that lithium-ions battery replaces plumbic acid and cadmium-nickel storage cell of adopting.The big electric current quick charger of the original configuration of these electronic equipments is mainly at plumbic acid or the design of cadmium-nickel storage cell charge characteristic, with these chargers nickel-hydrogen accumulator and lithium-ions battery are charged, because can not judge correctly whether electric weight is sufficient, storage battery is seriously overcharged, gas leakage, leakage even burn battery.
At the deficiency of NI-G, lead acid batteries charger, the someone designs nickel-hydrogen accumulator and lithium-ions battery special charger.But the battery that different manufacturers is produced is owing to the difference of material prescription, and its charge characteristic is also variant.In addition, new battery and the battery after use a period of time, because of internal resistance changes, charge characteristic is also variant.Therefore the charging matching problem of charger and battery still exists.
The objective of the invention is to avoid weak point in the above-mentioned prior art and a kind of active protection apparatus for charging of battery that is made of microprocessor control circuit and field effect transistor is provided; make when nickel-hydrogen accumulator or lithium-ions battery charge on various big electric current quick chargers; no matter can the correct decision battery sufficient electric weight of charger; as long as the electric weight abundance of battery own; just can initiatively charge circuit be disconnected; stop charging, guarantee cell safety.
Purpose of the present invention can reach by following measure:
A kind of active protection apparatus for charging of battery, it is characterized in that by field effect transistor as the battery charging and discharging circuit switching, the source S of field effect transistor connects battery case end, drain D connects the positive pole of battery pack E, grid G connects microprocessor control circuit output 2, and turning on and off by microprocessor control circuit of field effect transistor controlled according to the state of battery charge; This charge protection device becomes as a whole with storage battery with being loaded in the battery case; Resistor R as current detecting is serially connected between the negative pole and battery case end of storage battery E, and links to each other with microprocessor control circuit current detecting input 5,6; The thermistor Rt two ends of detecting as battery temperature link to each other with microprocessor control circuit temperature detection input 3,4 respectively; Link to each other with field effect transistor S end as the microprocessor control circuit input 1 of battery voltage detection and to receive battery case again and hold.
The present invention has following advantage compared to existing technology:
1, because active charge protection device and storage battery are combined in the battery box, the charging safety of battery is not limited by the influence of charger performance quality, therefore, all can charge safely and fast on the charger of each producer.
2, because active charge protector has the microprocessor control chip; the various electrical characteristic values of battery charging state can be enrolled program in advance; be cured in the memory of microprocessor; therefore to the battery of different manufacturers different formulations; all can be by its electrical characteristic values; write corresponding charge protection program, solved the bad difficult problem of different formulations battery charge interchangeability.
3, because this device becomes one with battery, overcome the new and old and volume change that existing charger can not be discerned battery.
4, this active charge protective circuit is cheap, helps promoting nickel-hydrogen accumulator, lithium-ions battery rapidly, preserves the ecological environment.And can solve user's difficult problem of Charge Management complexity in the past, save the user and transform or change expensive charger expense.
5, can make charger design from now on simpler, the charger versatility is better.
Fig. 1 is an electrical schematic diagram of the present invention.
Below in conjunction with accompanying drawing the present invention is further described:
There are two electrode terminals of , to link to each other on the battery case 7 with charger.Microprocessor control circuit adopts the PIC16C series microprocessor, as PIC16C71, PIC16C74.
1, charge in batteries current detecting principle
Resistor R is serially connected between the negative pole and battery case end of storage battery E, and links to each other with microprocessor control circuit current detecting input 5,6.Usually, fet gate G is controlled by microprocessor control circuit output 2 low levels, makes its source S drain D end be in opening state.When charger is connected to battery case , end when battery pack E charge, resistor R flows through generation and the proportional voltage signal of size of current on microprocessor control circuit current detecting input 5,6 because of electric current is arranged.Microprocessor calculates charging capacity according to charging current and charging interval, when reaching the fully charged time of battery, just by microprocessor control circuit 2 output high level, field effect transistor is ended, and automatically shuts down charging circuit.
2, charge in batteries temperature detection principle
Thermistor Rt two ends link to each other with microprocessor control circuit temperature detection input 3,4 respectively, and are close on the storage battery E.During battery charge, microprocessor control circuit is constantly gathered the resistance change amount of Rt, and along with the battery electric quantity abundance, battery temperature also raises.When variable quantity reaches certain value, by microprocessor control circuit output 2 output high level, field effect transistor is ended, turn-off charging circuit.
3, charge in batteries voltage detecting principle
Microprocessor control circuit input 1 is the voltage detecting end, and it links to each other with field effect transistor S end and receives battery case end again.Between charge period, when detecting battery pack E charging voltage above cell safety voltage, microprocessor control circuit output 2 output high level end field effect transistor, turn-off charging circuit.After charging finished battery case and charger disengagement, because field effect transistor is ended, battery case terminal voltage was an electronegative potential, when microprocessor detects this electronegative potential, by microprocessor control circuit output 2 output low levels, make field effect transistor open-minded, guarantee that battery can regular picture.
Claims (1)
1, a kind of active protection apparatus for charging of battery, it is characterized in that by field effect transistor as the battery charging and discharging circuit switching, the source electrode of field effect transistor (S) connects battery case () end, drain electrode (D) connects the positive pole of battery pack (E), grid (G) connects microprocessor control circuit output (2), and turning on and off by microprocessor control circuit of field effect transistor controlled according to the state of battery charge; This charge protection device becomes as a whole with storage battery with being loaded in the battery case; Resistor (R) as current detecting is serially connected between the negative pole and battery case () end of storage battery (E), and links to each other with microprocessor control circuit current detecting input (5), (6); Thermistor (Rt) two ends of detecting as battery temperature link to each other with microprocessor control circuit temperature detection input (3), (4) respectively; Link to each other with field effect transistor (S) end as the microprocessor control circuit input (1) of battery voltage detection and to receive battery case () again and hold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99114068A CN1079604C (en) | 1999-02-12 | 1999-02-12 | Active protection apparatus for charging of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99114068A CN1079604C (en) | 1999-02-12 | 1999-02-12 | Active protection apparatus for charging of battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1233874A CN1233874A (en) | 1999-11-03 |
| CN1079604C true CN1079604C (en) | 2002-02-20 |
Family
ID=5277192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99114068A Expired - Fee Related CN1079604C (en) | 1999-02-12 | 1999-02-12 | Active protection apparatus for charging of battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1079604C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105140577B (en) * | 2015-08-26 | 2018-03-30 | 苏州市博得立电源科技有限公司 | A kind of protection control device for rechargeable battery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4686444A (en) * | 1984-11-21 | 1987-08-11 | Samsung Electronics Co., Ltd. | Battery charging circuit |
| US5608305A (en) * | 1993-10-29 | 1997-03-04 | Sanyo Electric Co., Ltd. | Method and apparatus for compulsory discharging lithium-ion battery to prevent quality degradation |
-
1999
- 1999-02-12 CN CN99114068A patent/CN1079604C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4686444A (en) * | 1984-11-21 | 1987-08-11 | Samsung Electronics Co., Ltd. | Battery charging circuit |
| US5608305A (en) * | 1993-10-29 | 1997-03-04 | Sanyo Electric Co., Ltd. | Method and apparatus for compulsory discharging lithium-ion battery to prevent quality degradation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1233874A (en) | 1999-11-03 |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |