CN102364812A - Charging equalization circuit for power battery pack - Google Patents
Charging equalization circuit for power battery pack Download PDFInfo
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- CN102364812A CN102364812A CN2011103328527A CN201110332852A CN102364812A CN 102364812 A CN102364812 A CN 102364812A CN 2011103328527 A CN2011103328527 A CN 2011103328527A CN 201110332852 A CN201110332852 A CN 201110332852A CN 102364812 A CN102364812 A CN 102364812A
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Abstract
The invention discloses a charging equalization circuit for a power battery pack. The circuit comprises elementary batteries, a sampling comparator, a switching circuit, an oscillating circuit, a saturated discharged power feedback circuit and an optocoupler isolation control circuit, wherein the sampling comparator is used for comparing input elementary battery voltage with reference voltage, and outputting an effective level signal when the input elementary battery voltage is higher than the reference voltage; the switching circuit is switched on after receiving the effective level signal; the oscillating circuit is used for outputting an oscillating signal after receiving 5V power; the saturated discharging power feedback circuit is used for driving the discharging of the input elementary battery voltage after receiving the oscillating signal, and feeding the saturated discharged power of the elementary battery back to the battery pack; and the optocoupler isolation control circuit is used for receiving a switching-off control signal from a central processing unit (CPU) after the charging saturation of the battery pack; and after all the elementary batteries are charged to be saturated or the charging of all the elementary batteries is finished, the CPU transmits the switching-off control signal to the optocoupler isolation control circuit, controls the switching circuit to cut the 5V power of an oscillator off to switch the oscillating circuit off and stops the discharging of the elementary batteries.
Description
Technical field
the present invention relates to the power battery charging technical field, relate more specifically to a kind of power battery pack charge balancing circuit.
Background technology
The performance of the electrokinetic cell of
electric automobile has determined the performance of electric motor car to a great extent; The electrokinetic cell of electric automobile generally is in series by the more piece cell at present; Because there is inconsistency in cell; Its capacity can produce difference, decide and the capacity of series battery is a minimum capacity by cell, thereby these differences can shorten the useful life of battery pack; In order to reduce of the influence of this disequilibrium, in charging process, pay the utmost attention to the use equalization charging circuit to electrokinetic cell.
equalizing charge is divided into two kinds of chemical equalization and physics equalizations.Chemistry charge balancing method is in battery electrolyte, to add a certain proportion of oxidation-reduction pair, and preventing battery overcharge, but this method is difficult to control; Physics charge balancing method roughly comprises loss-type, centralized passive equalization and intelligent charging equalization etc.; Wherein the loss-type energy loss is bigger; Centralized passive equalization comprise monomer to group, organize monomer and two-way three kinds; They all are to adopt a magnetic core, and primary and secondary turn ratio consistency is relatively poor, and the life-span that promotes battery pack is unsatisfactory.
Summary of the invention
the purpose of this invention is to provide a kind of power battery pack charge balancing circuit, the saturated balanced way of battery electric quantity when it has realized the electrokinetic cell serial connection charge.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: a kind of power battery pack charge balancing circuit, and it comprises:
Element cell with the first input end and second input and first output and second output, a plurality of element cells composition power battery pack that is in series, the first input end of each element cell links to each other with the external charging source;
The sampling comparator links to each other with first output of said element cell, is used for the magnitude of voltage and the reference voltage of element cell are compared, and when the element cell power supply was less than or equal to reference voltage, said sampling comparator can not be exported the significant level signal; When cell voltage was higher than reference voltage, said sampling comparator was exported a significant level signal;
Switching circuit and driving power with first input end and second input and output; Said switching circuit will convert the start signal or the cut-off signal of controlling and driving power supply from the level signal of its first input end and the input of second input into; After driving power receives start signal or cut-off signal; Driving power power supply or outage; The first input end of said switching circuit links to each other with said sampling comparator, and said switching circuit receives the said significant level signal of said sampling comparator output and is converted into a start signal, the driving power power supply;
Oscillating circuit, after the driving power power supply, the oscillating circuit outputting oscillation signal, after the driving power outage, oscillating circuit stops outputting oscillation signal;
Saturated discharge electric energy feedback circuit with first input end and second input and output; The first input end of said saturated discharge electric energy feedback circuit links to each other with second output of said element cell; Second input of said saturated discharge electric energy feedback circuit links to each other with oscillating circuit; Said saturated discharge electric energy feedback circuit is used for behind the said oscillator signal that receives said oscillating circuit output; Drive said element cell discharge; Second input that voltage does not reach the element cell of normal voltage in the output of said saturated discharge electric energy feedback circuit and the said power battery pack links to each other, and said saturated discharge electric energy feedback circuit is used for the electric energy that said element cell is emitted is fed back to the element cell that power battery pack does not reach normal voltage;
light-coupled isolation control circuit; Be used for the voltage of each element cell is monitored; When said light-coupled isolation control circuit monitors each element cell when being in reference voltage; To the invalid level signal of second input output of said switching circuit, second input of said switching circuit is converted into cut-off signal after receiving invalid level signal, order about the driving power outage.
preferably; Said switching circuit comprises one first triode (V2); When cell voltage is higher than reference voltage; Said sampling comparator is exported a high level signal, drives said first triode (V2) conducting, further opens power supply power supply 5V to said oscillating circuit.
preferably, said oscillating circuit drives one second triode (V5) conducting after receiving driving power, drive a power MOSFET (V6) again, opens the element cell discharge.
preferably; When all element cells charged saturated or charge end, said light-coupled isolation control circuit drove one the 3rd triode (V3) conducting, thereby turn-offs said first triode (V2); Further turn-off said oscillating circuit, stop element battery discharge.
preferably comprise an inverse-excitation type transformer (T1) in the said saturated discharge electric energy feedback circuit.
preferably, said reference voltage is 3.8V.
the present invention be for the beneficial effect of prior art: the disclosed power battery pack charge balancing of the present invention circuit is the saturation voltage and the discharging current of control unit module accurately; Earlier saturated battery unit energy back is given battery pack; And saturated element cell pulse earlier sparks; Improved the chargeable curve of J.A.MAS of element cell, thus the life-span of improving whole series battery.Power battery pack circuit structure of the present invention is simple, safe and reliable, with low cost.
Description of drawings
Accompanying drawing 1 is an equalizing circuit principle framework sketch map of the present invention;
accompanying drawing 2 is the topology diagram of equalizing circuit of the present invention.
Embodiment
Set forth preferred embodiment of the present invention below in conjunction with accompanying drawing 1-2 in detail
; Thereby protection scope of the present invention is made more explicit defining so that advantage of the present invention and characteristic can be easier to those skilled in the art will recognize that.
Fig. 1 and Fig. 2 are consulted in
; Power battery pack charge balancing circuit of the present invention comprises: positive 5V power circuit; The non-isolated voltage converter of 5V that the cell voltage of input constitutes through N1 boosts and is 5V; That is, form aforementioned positive 5V power circuit, it is the supply voltage power supply of each control circuit in the circuit; The sampling comparator, it is made up of N2, is used for the cell voltage and the reference voltage of input are compared; Wherein the 3.8V voltage of this reference voltage for being provided by above-mentioned positive 5V power circuit when the cell voltage of this sampling comparator acquisition input is higher than the information of this reference voltage (3.8V), is exported a significant level signal; In this embodiment; This significant level signal is a high level signal, when the cell voltage of input is lower than this reference voltage, then continues charging; Switching circuit, it is used for behind the significant level signal that receives the output of sampling comparator, opening the 5V power supply, to oscillating circuit power supply is provided; Oscillating circuit, it is used for exporting an oscillator signal receiving after switching circuit opens the 5V power supply; Saturated discharge electric energy feedback circuit comprises an inverse-excitation type transformer T1, and it is used for behind the oscillator signal that receives oscillating circuit output, driver element cell voltage discharge circuit, and the electric energy that this cell voltage is changed out feeds back to power battery pack; The light-coupled isolation control circuit; It is used to receive the shutoff control signal that CPU sends, and when all saturated backs of element cell charging or charging end, exports a significant level signal to switching circuit; Make switching circuit turn-off the 5V power supply, and then turn-off oscillating circuit.
Fig. 1 and Fig. 2 are continued to consult in
, and in the preferred embodiment of the present invention, switching circuit comprises one first triode V2; When the cell voltage of input was higher than the reference voltage of 3.8V, the sampling comparator was exported a high level signal, drives this first triode V2 conducting; To oscillating circuit 5V is provided power supply, after oscillating circuit receives the 5V power supply, exports an oscillator signal; Drive one second triode V5 conducting, drive a power MOSFET V6 again, after saturated discharge electric energy feedback circuit is receiving this oscillator signal; Drive the element cell discharge of input, and the electric energy that element cell is changed out is fed back to power battery pack.Master cpu is monitored each cell voltage at random; When all element cells charged saturated or charge end, the light-coupled isolation control circuit drove one the 3rd triode V3 conducting, thereby turn-offs the first triode V2; Further turn-off oscillating circuit, the stop element battery discharges to power battery pack.
Power battery pack charge balancing circuit of the present invention; Guarantee the power supply of control circuit through design 5V power supply; Design sampling comparison circuit is controlled saturated discharge; Design oscillating circuit and control discharge frequency and discharging current, design saturated discharge electric energy feedback circuit and control discharge electric energy and feeding circuit electric current, design the light-coupled isolation control circuit and guarantee that timely isolated controlling element cell stops discharge after all saturated backs of element cell charging or batteries charging end; Wherein the computing formula of frequency of oscillation is:
f=1/(4*ln2*R*C)
In the formula, R=R8, C=C4=C5;
And the average saturated discharging current of element cell: I
f
=3.8/2 π fL; In the formula, f is the square wave oscillation frequency, and L is the primary inductance value of inverse-excitation type transformer T1, can consult Fig. 2.
the foregoing description only is explanation technical conceive of the present invention and characteristics, and its purpose is to let the personage who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (6)
1. power battery pack charge balancing circuit is characterized in that comprising:
Element cell with the first input end and second input and first output and second output, a plurality of element cells composition power battery pack that is in series, the first input end of each element cell links to each other with the external charging source;
The sampling comparator links to each other with first output of said element cell, is used for the magnitude of voltage and the reference voltage of element cell are compared, and when the element cell power supply was less than or equal to reference voltage, said sampling comparator can not be exported the significant level signal; When cell voltage was higher than reference voltage, said sampling comparator was exported a significant level signal;
Switching circuit and driving power with first input end and second input and output; Said switching circuit will convert the start signal or the cut-off signal of controlling and driving power supply from the level signal of its first input end and the input of second input into; After driving power receives start signal or cut-off signal; Driving power power supply or outage; The first input end of said switching circuit links to each other with said sampling comparator, and said switching circuit receives the said significant level signal of said sampling comparator output and is converted into a start signal, the driving power power supply;
Oscillating circuit, after the driving power power supply, the oscillating circuit outputting oscillation signal, after the driving power outage, oscillating circuit stops outputting oscillation signal;
Saturated discharge electric energy feedback circuit with first input end and second input and output; The first input end of said saturated discharge electric energy feedback circuit links to each other with second output of said element cell; Second input of said saturated discharge electric energy feedback circuit links to each other with oscillating circuit; Said saturated discharge electric energy feedback circuit is used for behind the said oscillator signal that receives said oscillating circuit output; Drive said element cell discharge; Second input that voltage does not reach the element cell of normal voltage in the output of said saturated discharge electric energy feedback circuit and the said power battery pack links to each other, and said saturated discharge electric energy feedback circuit is used for the electric energy that said element cell is emitted is fed back to the element cell that power battery pack does not reach normal voltage;
The light-coupled isolation control circuit; Be used for the voltage of each element cell is monitored; When said light-coupled isolation control circuit monitors each element cell when being in reference voltage; To the invalid level signal of second input output of said switching circuit, second input of said switching circuit is converted into cut-off signal after receiving invalid level signal, order about the driving power outage.
2. power battery pack charge balancing circuit according to claim 1; It is characterized in that: said switching circuit comprises one first triode (V2); When cell voltage is higher than reference voltage; Said sampling comparator is exported a high level signal, drives said first triode (V2) conducting, further opens power supply power supply 5V to said oscillating circuit.
3. power battery pack charge balancing circuit according to claim 1 is characterized in that: said oscillating circuit drives one second triode (V5) conducting after receiving driving power, drive a power MOSFET (V6) again, opens the element cell discharge.
4. power battery pack charge balancing circuit according to claim 1; It is characterized in that: when all element cells charge saturated or charge end; Said light-coupled isolation control circuit drives one the 3rd triode (V3) conducting; Thereby turn-off said first triode (V2), further turn-off said oscillating circuit, the stop element battery discharge.
5. power battery pack charge balancing circuit according to claim 1 is characterized in that: comprise an inverse-excitation type transformer (T1) in the said saturated discharge electric energy feedback circuit.
6. power battery pack charge balancing circuit according to claim 1 is characterized in that: said reference voltage is 3.8V.
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| CN201110332852.7A CN102364812B (en) | 2011-10-28 | 2011-10-28 | Charging equalization circuit for power battery pack |
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| CN201110332852.7A CN102364812B (en) | 2011-10-28 | 2011-10-28 | Charging equalization circuit for power battery pack |
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| CN102364812B CN102364812B (en) | 2014-04-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103269104A (en) * | 2013-05-30 | 2013-08-28 | 国家电网公司 | Storage battery voltage equalizing instrument |
| CN115085314A (en) * | 2022-06-24 | 2022-09-20 | 上海南麟电子股份有限公司 | Asynchronous boosting and charging control circuit, chip, system and method for battery |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003111294A (en) * | 2001-09-27 | 2003-04-11 | Nec Mobile Energy Kk | Multiple series connected protective battery pack |
| CN101192755A (en) * | 2006-11-27 | 2008-06-04 | 比亚迪股份有限公司 | A voltage balance management device of dynamic battery pack and management method |
| CN101325271A (en) * | 2008-07-30 | 2008-12-17 | 赵建和 | Device for managing equalization of series battery |
| EP2075894A2 (en) * | 2007-12-27 | 2009-07-01 | Sanyo Electric Co., Ltd. | State of charge equalizing device and assembled battery system including same |
| WO2010018597A2 (en) * | 2008-07-28 | 2010-02-18 | Kpit Cummins Infosystems Limited | Method and apparatus for equalization of battery packs |
| CN101976866A (en) * | 2010-10-17 | 2011-02-16 | 中国船舶重工集团公司第七一二研究所 | Balanced judgment and supplementary device of energy transfer type battery pack and method thereof |
| CN201868903U (en) * | 2010-10-17 | 2011-06-15 | 中国船舶重工集团公司第七一二研究所 | Energy transferring balance judgment and supplementation device for battery pack |
-
2011
- 2011-10-28 CN CN201110332852.7A patent/CN102364812B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003111294A (en) * | 2001-09-27 | 2003-04-11 | Nec Mobile Energy Kk | Multiple series connected protective battery pack |
| CN101192755A (en) * | 2006-11-27 | 2008-06-04 | 比亚迪股份有限公司 | A voltage balance management device of dynamic battery pack and management method |
| EP2075894A2 (en) * | 2007-12-27 | 2009-07-01 | Sanyo Electric Co., Ltd. | State of charge equalizing device and assembled battery system including same |
| EP2075894A3 (en) * | 2007-12-27 | 2011-02-02 | Sanyo Electric Co., Ltd. | State of charge equalizing device and assembled battery system including same |
| WO2010018597A2 (en) * | 2008-07-28 | 2010-02-18 | Kpit Cummins Infosystems Limited | Method and apparatus for equalization of battery packs |
| CN101325271A (en) * | 2008-07-30 | 2008-12-17 | 赵建和 | Device for managing equalization of series battery |
| CN101976866A (en) * | 2010-10-17 | 2011-02-16 | 中国船舶重工集团公司第七一二研究所 | Balanced judgment and supplementary device of energy transfer type battery pack and method thereof |
| CN201868903U (en) * | 2010-10-17 | 2011-06-15 | 中国船舶重工集团公司第七一二研究所 | Energy transferring balance judgment and supplementation device for battery pack |
Non-Patent Citations (2)
| Title |
|---|
| 李书旗等: "蓄电池组均衡电路的设计与试验", 《科学技术与工程》, no. 13, 1 July 2009 (2009-07-01), pages 3801 - 3805 * |
| 李灵杰等: "动力锂电池组充电管理电路设计", 《厦门大学学报(自然科学版)》, no. 05, 15 September 2008 (2008-09-15), pages 673 - 676 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103269104A (en) * | 2013-05-30 | 2013-08-28 | 国家电网公司 | Storage battery voltage equalizing instrument |
| CN115085314A (en) * | 2022-06-24 | 2022-09-20 | 上海南麟电子股份有限公司 | Asynchronous boosting and charging control circuit, chip, system and method for battery |
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| CN102364812B (en) | 2014-04-23 |
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Effective date of registration: 20180814 Address after: 233030 2016 Tang He road, Bengbu, Anhui Patentee after: Huadong Photoelectric Integrated Device Research Institute Address before: 215163 No. 89 Longshan Road, hi tech Zone, Suzhou, Jiangsu Patentee before: China North Industries Group Corporation No.214 Research Institute Suzhou R&D Center |
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