CN105553026A - Battery pack electricity equalization circuit and equalization method - Google Patents
Battery pack electricity equalization circuit and equalization method Download PDFInfo
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- CN105553026A CN105553026A CN201610065329.5A CN201610065329A CN105553026A CN 105553026 A CN105553026 A CN 105553026A CN 201610065329 A CN201610065329 A CN 201610065329A CN 105553026 A CN105553026 A CN 105553026A
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000005611 electricity Effects 0.000 title claims abstract description 8
- 238000005070 sampling Methods 0.000 claims abstract description 16
- 230000000087 stabilizing effect Effects 0.000 claims description 37
- 238000002955 isolation Methods 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 241000156302 Porcine hemagglutinating encephalomyelitis virus Species 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000004224 protection Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 101100112673 Rattus norvegicus Ccnd2 gene Proteins 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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- H02J7/0026—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00306—Overdischarge protection
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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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a battery pack electricity equalization circuit. The battery pack electricity equalization circuit comprises N-1 battery equalization unit circuits, N voltage sampling circuits, an auxiliary power module, a single-chip microcomputer control module and a driver module, wherein the Kth voltage sampling circuit and the (K+1)th voltage sampling circuit acquire a voltage at two ends of a Kth battery and a voltage at two ends of a (K+1)th battery, and transmit the voltages to the single-chip microcomputer control module; the single-chip microcomputer control module outputs a driver signal to the driver module according to the voltages; the driver signal output by the driver module is transmitted to the Kth battery equalization unit circuit; and the Kth battery equalization unit circuit controls the Kth battery to be discharged and the (K+1)th battery to be charged or controls the Kth battery to be charged and the (K+1)th battery to be discharged, so that electricity equalization of the Kth battery and the (K+1)th battery can be achieved, wherein K is greater than or equal to 1 and less than or equal to N-1. According to the equalization circuit and method, the equalization circuit is simple in structure, high in conversion efficiency, low in cost and high in reliability, and can expand the available capacity of a battery pack and prolong the service life of the battery pack.
Description
Technical field
The present invention relates to technical field of battery management, particularly a kind of battery electric quantity equalizing circuit and equalization methods, be applicable to the rechargeable battery set of connecting.
Background technology
In new forms of energy system, battery system is wherein indispensable important component part, in recent years, take lithium battery as the electric bicycle, hybrid vehicle, electric automobile, fuel cell car etc. of power is subject to people concern with advantages such as high-energy-density, high repetitive cycling access times, lightweight and environmental protections.The safety of battery use procedure and the key of Control for Dependability are battery management system, not only will ensure that cell safety uses reliably, and will give full play to the ability of battery and increase the service life.A battery pack generally includes the battery unit of several mutual series connection, because each battery unit can cause imbalance between these battery units in the difference of each side such as charged state, impedance and temperature characterisitic.This unbalanced phenomena makes that the capacity of whole battery pack reduces, the lost of life.Therefore, in battery pack, need application battery equalizing circuit adjusted, to keep the capacity of battery pack, extend the life-span of battery pack.
The electricity that may occur for series-connected cell is higher, problem on the low side, and solution has the equalizing circuits such as parallel resistance shunting, bi-directional DC-DC equalization, coaxial transformer equalization, but these circuit have transformer, and circuit cost is increased.
Summary of the invention
The object of the invention is to overcome the shortcoming of prior art and deficiency, a kind of battery electric quantity equalizing circuit is provided, for ensureing that the monomer in battery pack does not occur for the purpose of overcharge and overdischarge in charging and discharging process, thus improve the unbalanced phenomenon of series battery, improve the active volume of battery pack, reduce maintenance and the replacement cycle of series battery, extend the useful life of battery pack, reduce the cost of EV, PHEV and storage station.
Another object of the present invention is to provide a kind of battery electric quantity equalization methods.
Object of the present invention is realized by following technical scheme:
A kind of battery electric quantity equalizing circuit, for the electricity of the battery pack that the N number of series-connected cell of equilibrium is formed, comprise N-1 battery balanced element circuit, the N number of voltage sampling circuit gathering N number of battery both end voltage respectively, auxiliary power module, single chip control module and driver module, wherein K battery balanced element circuit first port, the second port, the 3rd port connect the positive pole of K battery, a K battery and the junction of K+1 battery, the negative pole of a K+1 battery respectively, K voltage sampling circuit, K+1 voltage sampling circuit gathers K battery respectively, the voltage at K+1 battery two ends, and transfer to single chip control module, single chip control module exports corresponding drive singal to driver module after calculating, the drive singal that driver module exports transfers to K battery balanced element circuit respectively, K battery balanced element circuit controls K battery discharge, K+1 battery charging or K battery charging, K+1 battery discharge, make K battery, K+1 battery reaches electric quantity balancing, wherein 1≤K≤N-1.
Described battery balanced element circuit, include and comprise the first switching tube, second switch pipe, first diode, second diode, first electric capacity, first inductance, second inductance, first diode inverse parallel is on the first switching tube, second diode inverse parallel is on second switch pipe, one end of first inductance is connected with the positive pole of the first battery, the other end of the first inductance is connected with the drain electrode of the first switching tube with the positive pole of the first electric capacity, the source electrode of the first switching tube and the negative pole of the first battery, the positive pole of the second battery is connected, the source electrode of second switch pipe is connected with the positive pole of the second battery, the drain electrode of second switch pipe is connected with the negative pole of the first electric capacity, the negative pole of the first electric capacity connects one end of the second inductance simultaneously, the other end of the second inductance is connected with the negative pole of the second battery, first voltage sensor is sampled the terminal voltage Ub1 of the first battery, second voltage sensor is sampled the terminal voltage Ub2 of the second battery.
Described auxiliary power module comprise the first rectifier bridge, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the first resistance, the second resistance, for exporting the first voltage stabilizing chip of 15V direct voltage and the second voltage stabilizing chip for exporting 5V direct voltage; Wherein the second rectifier bridge upper end, lower end connect the two ends of input power VAC respectively, and left end is connected with the positive pole of the 5th electric capacity, and right-hand member is connected with the negative pole of the 5th electric capacity; The input of the positive pole termination first voltage stabilizing chip of the 3rd electric capacity, the input of the output termination second voltage stabilizing chip of the first voltage stabilizing chip, the output of the second voltage stabilizing chip is connected with the input of single chip control module and driver module; The earth terminal of the first voltage stabilizing chip is connected with second resistance one end, the other end ground connection of the second resistance; One end of first resistance is connected with one end of the second resistance, the output of another termination first voltage stabilizing chip; 4th electric capacity connects the input of the second voltage stabilizing chip, other end ground connection; The output of the positive pole termination second voltage stabilizing chip of the 5th electric capacity, other end ground connection.
Described driver module comprises the identical drive singal decision circuitry of 2 × (N-1) individual structures, and each drive singal decision circuitry includes the 3rd resistance, the 6th electric capacity, first and door, the first driving isolation circuit; The control signal that single chip control module exports is connected to the 3rd resistance and first and an input of door; Another termination first of 3rd resistance and another input of door and one end of the 6th electric capacity, the other end ground connection of the 6th electric capacity; First connects the first driving isolation circuit with the output of door.
Described driving isolation circuit comprises the first triode, the second triode, the 7th electric capacity, the first transformer, the 4th resistance; Be connected after the base stage of the first triode is connected with the base stage of the second triode first with the output of door; Be connected with one end of the 7th electric capacity after the emitter of the first triode is connected with the emitter of the second triode, the collector electrode of the first triode connects the output of the first voltage stabilizing chip in auxiliary power module, ground connection after the collector electrode of the second triode is connected with an input of the first transformer, another input of another termination first transformer of the 7th electric capacity; An output of the first transformer is connected with one end of the 4th resistance, the source electrode of another termination main circuit switch pipe, the gate pole of another termination main circuit switch pipe of the 4th resistance.
Another object of the present invention is realized by following technical scheme:
The battery electric quantity equalization methods of battery electric quantity equalizing circuit, comprises following order:
S1. K voltage sampling circuit, a K+1 voltage sampling circuit gather the voltage at K battery, a K+1 battery two ends respectively, and transfer to single chip control module;
S2. single chip control module exports corresponding drive singal to driver module after calculating, and the drive singal that driver module exports transfers to K battery balanced element circuit respectively;
S3. K battery balanced element circuit controls K battery discharge, a K+1 battery charges or K battery charges, a K+1 battery discharge, make K battery, a K+1 battery reaches electric quantity balancing, wherein 1≤K≤N-1, N is the number of batteries of battery pack series connection.
Compared with prior art, tool has the following advantages and beneficial effect in the present invention:
The present invention can ensure that the monomer in battery pack does not occur for the purpose of overcharge and overdischarge in charging and discharging process, thus improve the unbalanced phenomenon of series battery, improve the active volume of battery pack, reduce maintenance and the replacement cycle of series battery, extend the useful life of battery pack, reduce the cost of EV, PHEV and storage station.
When any one monomer energy is too high or too low in battery pack, itself and adjacent battery is made to reach electric quantity balancing by the switch on and off of battery balanced element circuit, then with the overall equilibrium of several balanced unit circuit realiration battery pack.
Accompanying drawing explanation
Fig. 1 is the structural representation of battery electric quantity equalizing circuit of the present invention.
Fig. 2 is the circuit diagram of auxiliary power module of the present invention.
Fig. 3 is the circuit diagram of driver module of the present invention.
Fig. 4 is the driving isolation circuit diagram in driver module of the present invention.
Fig. 5 is the circuit diagram of battery balanced element circuit of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Fig. 1 gives the structural representation of a kind of battery equalizing circuit of example of the present invention, comprising main circuit, and auxiliary power module, single chip control module (conventional single-chip microcomputer can be adopted), driver module.Main circuit comprises N and saves the lead-acid battery or lithium ion battery that are connected in series, the first ~ the (N-1) balanced unit circuit, as Fig. 5, each balanced unit circuit respectively with three end points (positive poles of adjacent two batteries, both positive and negative polarity tie point, negative pole) be connected, first balanced unit circuit comprises the first switching tube, second switch pipe, first diode, second diode, first electric capacity, first inductance, second inductance, first diode inverse parallel is on the first switching tube, second diode inverse parallel is on second switch pipe, one end of first inductance is connected with the positive pole of battery 1, the other end of the first inductance is connected with the drain electrode of the first switching tube with the positive pole of the first electric capacity, the source electrode of the first switching tube is connected with the positive pole of battery 2 with the negative pole of battery 1, the source electrode of second switch pipe is connected with the positive pole of battery 2, the drain electrode of second switch pipe is connected with the negative pole of the first electric capacity, the negative pole of the first electric capacity connects one end of the second inductance simultaneously, the other end of the second inductance is connected with the negative pole of battery 2, the terminal voltage Ub1 of the first voltage sensor sampling battery 1, the terminal voltage Ub2 of the second voltage sensor sampling battery 2, the second ~ the (N-1) individual equalizing circuit unit has the structure identical with the first equalizing circuit unit.Sample circuit comprises N number of identical voltage sensor circuit, the input of N voltage sensor and the parallel connection of N battery two ends, and the output of N voltage sensor connects the battery N terminal voltage UbN sampling input of single chip control module.The alternating voltage of 220V is converted into the direct voltage output of 15V and 5V by auxiliary power module, as the accessory power supply of single chip control module and driver module.As shown in the balanced unit circuit 1 in figure, if the voltage U b1 of battery 1 is greater than the voltage U b2 of battery 2, open signal then to the first switching tube Q1, battery 1 is discharged by the first inductance L 1 and the first switching tube Q1, thus the terminal voltage of battery 1 is reduced, meanwhile, the first electric capacity, the first switch, the second inductance, battery 2 form loop, first electric capacity charges to battery 2, thus the terminal voltage of battery 2 is raised; If the voltage U b1 of battery 1 is less than the voltage U b2 of battery 2, then open signal to second switch pipe Q2, battery 2 is discharged by the second inductance L 2 and second switch pipe Q2, thus the terminal voltage of battery 2 is reduced, simultaneously, first electric capacity, the first inductance, battery 1, second switch form loop, and the first electric capacity charges to battery 1, thus the terminal voltage of battery 1 is raised; The automatic equalization of the electricity of battery 1 and battery 2 is realized by the ON time adjusting the first switching tube and second switch pipe.By that analogy, this battery balanced element circuit can realize the battery electric quantity equilibrium of any even number series-connected cell composition.
Fig. 2 gives the circuit diagram of the auxiliary power module of battery equalizing circuit of the present invention, and auxiliary power module comprises rectifier bridge Bridge, the 3rd electric capacity C3, the 4th electric capacity C4, the 5th electric capacity C5, the first resistance R1, the second resistance R2.For exporting the first voltage stabilizing chip TL783 of 15V direct voltage and the second voltage stabilizing chip 7805 for exporting 5V direct voltage.The upper and lower two ends of rectifier bridge Bridge connect AC+ and the AC-two ends of input power Vac respectively, and two ends connect with the two ends of the 3rd electric capacity respectively.The Vin1 end of the positive pole termination first voltage stabilizing chip of the 3rd electric capacity, the output end vo ut1 of the first voltage stabilizing chip meets the input Vin2 of the second voltage stabilizing chip, and the output end vo ut2 of the second voltage stabilizing chip is connected with the input Vcc of one-chip computer module and driver module.The earth terminal of the first voltage stabilizing chip connects with second resistance one end, the other end ground connection of the second resistance.One end of first resistance is connected with one end of the second resistance, the output of another termination first voltage stabilizing chip.The positive pole of the 4th electric capacity connects the input of the second voltage stabilizing chip, other end ground connection.The output of the positive pole termination second voltage stabilizing chip of the 5th electric capacity, other end ground connection.The ac voltage rectifier of 220V is become direct voltage by rectifier bridge, the resistance of the first resistance and the second resistance regulates the size of TL783 output voltage, 4th electric capacity is the output filter capacitor of the first voltage stabilizing chip TL783 and the input filter capacitor of the second voltage stabilizing chip 7805,5th electric capacity is the output filter capacitor of the second voltage stabilizing chip, voltage stabilizing chip TL783 and 7805 exports the direct voltage of 15V and 5V respectively, as the power supply of each control circuit of internal system.
Fig. 3 gives the circuit diagram of driver module, and driver module comprises the 3rd resistance R3, the 6th electric capacity C6, first and door U1 and the first driving isolation circuit.The drive singal that single chip control module exports connects one end and first and door of the 3rd resistance respectively.Another termination first of 3rd resistance and one end of door and one end of the 6th electric capacity, the other end ground connection of the 6th electric capacity; First connects the first driving isolation circuit with the output of door.
Fig. 4 gives the circuit diagram of driving isolation in driver module, and driving isolation circuit comprises the first triode VT1, the second triode VT2, the 7th electric capacity C7, the first transformer T1, the 4th resistance R4; Be connected after the base stage of the first triode is connected with the base stage of the second triode first with the output of door; Be connected with one end of the 7th electric capacity after the emitter of the first triode is connected with the emitter of the second triode, the collector electrode of the first triode connects the output of the first voltage stabilizing chip in auxiliary power module, ground connection after the collector electrode of the second triode is connected with an input of the first transformer, another input of another termination first transformer of the 7th electric capacity; An output of the first transformer is connected with one end of the 4th resistance, the source electrode of the switching tube that another termination main circuit drives, the gate pole of another termination main circuit institute driving switch pipe of the 4th resistance.When the high level of drive singal arrives, the first triode ON, due to the effect of the first transformer, drive singal 1 exports high level, the conducting of driving switch pipe; When drive singal is low level, the second triode ON, the first transformer is input as low level, drive singal 1 output low level, and driving switch pipe turns off.
Above-described embodiment is the present invention's preferably execution mode; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (6)
1. a battery electric quantity equalizing circuit, for the electricity of the battery pack that the N number of series-connected cell of equilibrium is formed, it is characterized in that: comprise N-1 battery balanced element circuit, the N number of voltage sampling circuit gathering N number of battery both end voltage respectively, auxiliary power module, single chip control module and driver module, wherein K battery balanced element circuit first port, the second port, the 3rd port connect the positive pole of K battery, a K battery and the junction of K+1 battery, the negative pole of a K+1 battery respectively, K voltage sampling circuit, K+1 voltage sampling circuit gathers K battery respectively, the voltage at K+1 battery two ends, and transfer to single chip control module, single chip control module exports corresponding drive singal to driver module after calculating, the drive singal that driver module exports transfers to K battery balanced element circuit respectively, K battery balanced element circuit controls K battery discharge, K+1 battery charging or K battery charging, K+1 battery discharge, make K battery, K+1 battery reaches electric quantity balancing, wherein 1≤K≤N-1.
2. battery electric quantity equalizing circuit according to claim 1, it is characterized in that: described battery balanced element circuit, include and comprise the first switching tube, second switch pipe, first diode, second diode, first electric capacity, first inductance, second inductance, first diode inverse parallel is on the first switching tube, second diode inverse parallel is on second switch pipe, one end of first inductance is connected with the positive pole of the first battery, the other end of the first inductance is connected with the drain electrode of the first switching tube with the positive pole of the first electric capacity, the source electrode of the first switching tube and the negative pole of the first battery, the positive pole of the second battery is connected, the source electrode of second switch pipe is connected with the positive pole of the second battery, the drain electrode of second switch pipe is connected with the negative pole of the first electric capacity, the negative pole of the first electric capacity connects one end of the second inductance simultaneously, the other end of the second inductance is connected with the negative pole of the second battery, first voltage sensor is sampled the terminal voltage Ub1 of the first battery, second voltage sensor is sampled the terminal voltage Ub2 of the second battery.
3. battery electric quantity equalizing circuit according to claim 1, is characterized in that: described auxiliary power module comprise the first rectifier bridge, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the first resistance, the second resistance, for exporting the first voltage stabilizing chip of 15V direct voltage and the second voltage stabilizing chip for exporting 5V direct voltage; Wherein the second rectifier bridge upper end, lower end connect the two ends of input power VAC respectively, and left end is connected with the positive pole of the 5th electric capacity, and right-hand member is connected with the negative pole of the 5th electric capacity; The input of the positive pole termination first voltage stabilizing chip of the 3rd electric capacity, the input of the output termination second voltage stabilizing chip of the first voltage stabilizing chip, the output of the second voltage stabilizing chip is connected with the input of single chip control module and driver module; The earth terminal of the first voltage stabilizing chip is connected with second resistance one end, the other end ground connection of the second resistance; One end of first resistance is connected with one end of the second resistance, the output of another termination first voltage stabilizing chip; 4th electric capacity connects the input of the second voltage stabilizing chip, other end ground connection; The output of the positive pole termination second voltage stabilizing chip of the 5th electric capacity, other end ground connection.
4. battery electric quantity equalizing circuit according to claim 1, it is characterized in that: described driver module comprises the identical drive singal decision circuitry of 2 × (N-1) individual structures, each drive singal decision circuitry includes the 3rd resistance, the 6th electric capacity, first and door, the first driving isolation circuit; The control signal that single chip control module exports is connected to the 3rd resistance and first and an input of door; Another termination first of 3rd resistance and another input of door and one end of the 6th electric capacity, the other end ground connection of the 6th electric capacity; First connects the first driving isolation circuit with the output of door.
5. battery electric quantity equalizing circuit according to claim 4, is characterized in that: described driving isolation circuit comprises the first triode, the second triode, the 7th electric capacity, the first transformer, the 4th resistance; Be connected after the base stage of the first triode is connected with the base stage of the second triode first with the output of door; Be connected with one end of the 7th electric capacity after the emitter of the first triode is connected with the emitter of the second triode, the collector electrode of the first triode connects the output of the first voltage stabilizing chip in auxiliary power module, ground connection after the collector electrode of the second triode is connected with an input of the first transformer, another input of another termination first transformer of the 7th electric capacity; An output of the first transformer is connected with one end of the 4th resistance, the source electrode of another termination main circuit switch pipe, the gate pole of another termination main circuit switch pipe of the 4th resistance.
6. the battery electric quantity equalization methods of battery electric quantity equalizing circuit according to any one of claim 1 to 5, is characterized in that, comprise following order:
S1. K voltage sampling circuit, a K+1 voltage sampling circuit gather the voltage at K battery, a K+1 battery two ends respectively, and transfer to single chip control module;
S2. single chip control module exports corresponding drive singal to driver module after calculating, and the drive singal that driver module exports transfers to K battery balanced element circuit respectively;
S3. K battery balanced element circuit controls K battery discharge, a K+1 battery charges or K battery charges, a K+1 battery discharge, make K battery, a K+1 battery reaches electric quantity balancing, wherein 1≤K≤N-1, N is the number of batteries of battery pack series connection.
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| CN201610065329.5A CN105553026A (en) | 2016-01-29 | 2016-01-29 | Battery pack electricity equalization circuit and equalization method |
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| CN114421031A (en) * | 2022-01-05 | 2022-04-29 | 福建星云电子股份有限公司 | Portable battery cell balancing device |
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| CN110048488A (en) * | 2019-05-16 | 2019-07-23 | 西北工业大学 | A kind of cascade structure and balance control method of series-connected cell group active equalization module |
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| CN110422080A (en) * | 2019-07-17 | 2019-11-08 | 广州雷利诺车业有限公司 | A kind of electric motor car with two wheels battery management method and battery management system |
| CN110429352A (en) * | 2019-07-23 | 2019-11-08 | 广州供电局有限公司 | Constant current equilibrium model group and constant current balancer |
| CN110429352B (en) * | 2019-07-23 | 2024-07-09 | 广东电网有限责任公司广州供电局 | Constant-current equalization module and constant-current equalization device |
| CN113733984A (en) * | 2021-08-30 | 2021-12-03 | 北京理工大学 | Auxiliary equalizing charge device based on SOC estimation |
| CN113733984B (en) * | 2021-08-30 | 2024-03-22 | 北京理工大学 | Auxiliary equalizing charge device based on SOC estimation |
| CN114421031A (en) * | 2022-01-05 | 2022-04-29 | 福建星云电子股份有限公司 | Portable battery cell balancing device |
| CN115765121A (en) * | 2023-01-10 | 2023-03-07 | 柏腾数科(杭州)科技有限公司 | New forms of energy storage battery distributed control system |
| CN116488294A (en) * | 2023-04-26 | 2023-07-25 | 四川吉利学院 | Battery equalization circuit system and control method thereof |
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