CN105553009A - Equalization circuit for rapidly balancing battery pack of switch array and control method - Google Patents
Equalization circuit for rapidly balancing battery pack of switch array and control method Download PDFInfo
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- CN105553009A CN105553009A CN201511008834.8A CN201511008834A CN105553009A CN 105553009 A CN105553009 A CN 105553009A CN 201511008834 A CN201511008834 A CN 201511008834A CN 105553009 A CN105553009 A CN 105553009A
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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
Abstract
The invention discloses an equalization circuit for rapidly balancing a battery pack of a switch array and a control method. The circuit comprises a single battery switch selection sub circuit, a resistance discharging combination sub circuit, a single voltage acquisition sub circuit and a switch control driving sub circuit, wherein the single battery switch selection sub circuit is used for conducting a single battery needed to be discharged, the resistance discharging combination sub circuit is used for configuring the size of a discharging current, the single voltage acquisition sub circuit is used for acquiring an actual voltage value of each section of single battery and calculating the single battery needed to be balanced, and the switch control driving sub circuit is used for controlling a corresponding switch and balancing the single battery. By the single battery switch selection sub circuit, balanced discharging of multiple sections of single batteries can be simultaneously achieved; and during discharging, the switch of the single battery switch selection sub circuit is selected and the switch of the closed resistance discharging combination sub circuit is matched to form a discharging loop, and the balance of the selected single battery is achieved.
Description
Technical field
The present invention relates to the technical field of new-energy automobile, more particularly, relate to a kind of equalizing circuit and control method of switch arrays fast uniform battery pack.
Background technology
Electric automobile power battery group is made up of string lithium ion cell up to a hundred, between lithium ion single battery consistency for the serviceability of electric automobile and the life-span most important.Present passive equalizing circuit euqalizing current is little, and balanced discharge loop is fixed, and so just limits the size of euqalizing current, and needs lower the magnitude of voltage of most high monomer battery more difficult fast like this.Consistency of battery pack evaluation is one of the core of serial battery application technology in groups, directly has influence on fail safe and high efficiency that battery pack uses.In prior art, the existing more method for evaluating consistency of document to battery pack is discussed, and propose multiple equalizing circuit, but be all carry out Conformance Assessment based on the external voltage difference between battery and implement Balance route mostly, this kind of evaluation method is due to can not inherent difference effectively between pilot cell and cause portfolio effect to be demoted.This makes the capacity of vehicle-mounted online equalizer, volume, cost and heat radiation all be difficult to solve; And the equilibrium of off-line type obviously can increase the workload of battery maintenance, and the final large-scale promotion application hindering electric automobile.
Summary of the invention
The object of the invention is to overcome above-mentioned defect of the prior art, a kind of equalizing circuit and control method of switch arrays fast uniform battery pack is provided, realize reaching the conforming requirement of voltage fast between batteries monomer voltage.
For achieving the above object, technical scheme provided by the invention is as follows:
The invention provides a kind of equalizing circuit of switch arrays fast uniform battery pack, comprise cell switch chooser circuit, conductive discharge combination electronic circuit, monomer voltage collection electronic circuit and switch control rule drive sub-circuits; Described cell switch chooser circuit needs the cell of electric discharge for connecting, described conductive discharge combination electronic circuit is used for the configuration of discharging current size, described monomer voltage gathers electronic circuit for gathering the actual voltage value often saving cell, and calculate the cell needing equilibrium, described switch control rule drive sub-circuits controls corresponding switch, carries out the equilibrium to cell.
As preferred technical scheme, described cell switch chooser circuit comprises multiple cell and multiple cell gating switch, described cell and cell gating switch are directly connected, when cell needs balanced, the cell gating switch that cell two ends connect is closed, by this joint cell access discharge loop below.
As preferred technical scheme, described conductive discharge combination electronic circuit comprises multiple resistance and multiple resistance gating switch, and described resistance is connected with resistance gating switch, when the resistance gating switch corresponding with resistance closes, this resistance access discharge loop.
As preferred technical scheme, described cell gating switch and resistance gating switch are by metal-oxide-semiconductor or solid-state relay composition.
As preferred technical scheme, described monomer voltage Acquisition Circuit comprises controller and lithium ion battery special chip, described lithium ion battery special chip respectively with often save cell and connect, for gathering the voltage of each joint cell; Described controller processes the data collected, analyze and need balanced cell, then control switch controls drive sub-circuits, closed pair answers cell gating switch, the resistance gating switch of cell, cell and resistance is made to form discharge loop, to high-tension cell equalization discharge.
Present invention also offers a kind of control method of equalizing circuit of switch arrays fast uniform battery pack, the method comprises the steps:
(1) after the low-voltage on battery management system is started working, gather electronic circuit by monomer voltage, measure the actual voltage value that battery pack often saves cell, and store;
(2) monomer voltage collected is sorted, calculate the most difference between high monomer voltage and minimum monomer voltage of battery pack, and the mean value between all cells calculating battery pack;
(3) mean value of all monomer voltages and minimum monomer voltage compare, if difference is less than needs open balanced threshold value, then the cell being less than mean value does not need to carry out equilibrium;
(4) mean value of all monomer voltages and most high monomer voltage compare, if difference is less than the threshold value of needs equilibrium, then the battery being greater than mean value does not need to carry out equilibrium;
(5) if minimum monomer battery voltage and the difference of mean value are greater than the balanced threshold value of needs, find out and need balanced minimum cell numbering, then this cell numbering is above all needs equilibrium.
As preferred technical scheme, in step (2), be: the monomer voltage collected is placed in an one-dimension array adopt the method for selected and sorted to find out maximum and the minimum value of monomer voltage to the method that the monomer voltage collected sorts.
As preferred technical scheme, in step (5), balanced method is as follows:
(5-1) most high monomer battery is discharged, and according to discharge capacity by corresponding resistor parallel connection access discharge loop, discharge with maximum electric current;
(5-2) secondary high monomer battery is discharged, if the pressure reduction of secondary high monomer voltage and mean value is greater than open threshold value 1, but be less than threshold value 2, the then cell gating switch of the cell switch chooser circuit that closed time high monomer battery is corresponding, the resistance gating switch of the conductive discharge combination electronic circuit that closed time high monomer battery is corresponding simultaneously, by corresponding resistor coupled in parallel access discharge loop, discharge, described threshold value 1, threshold value 2 are all the balanced differences of opening of setting, also namely open balanced condition, the grade of threshold value 1 is less than the grade of threshold value 2;
(5-3) circulate until the voltage of all cells reaches the threshold requirement of setting successively.
As preferred technical scheme, in step (5), if there are two joint cells to need equilibrium, between this two joints cell, pressure reduction is no more than setting threshold 3, and balanced pressure reduction is all greater than setting threshold 1, be less than setting threshold 2, then equilibrium carried out to two joint cells simultaneously.
As preferred technical scheme, if there is the adjacent cell of three joints to need equilibrium, small area analysis is then adopted to carry out equilibrium, the cell gating switch of closed first segment and cell switch chooser circuit corresponding to Section of three cell, access the resistance gating switch of first segment and Section of three conductive discharge that cell is corresponding combination electronic circuit simultaneously, access corresponding resistor forms discharge loop, carries out equilibrium.
Compared with prior art, beneficial effect of the present invention is:
1, the present invention combines electronic circuit according to conductive discharge, corresponding resistance can be carried out parallel connection, thus the size of adjustment discharging current, simple to operate, flexible.
2, the present invention can realize more piece cell balanced discharge simultaneously by cell switch chooser circuit, when discharging, select the cell gating switch of closed cell switch chooser circuit, the resistance gating switch of fitting closure conductive discharge combination electronic circuit again, form discharge loop, realize the equilibrium to selected cell.
3, multiple resistor coupled in parallel in equalizing circuit of the present invention, shunt resistance, reduces the heat above single resistance, and it is too high and damage that protective resistance is unlikely to temperature.
4, cell switch chooser circuit of the present invention, conductive discharge combination electronic circuit can independent assortment, realize the variation of control mode, meet the electric discharge demand under different mode.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structure chart of the equalizing circuit of the switch arrays fast uniform battery pack that the embodiment of the present invention one provides;
Fig. 2 is the flow chart of the equalizing circuit control method of the switch arrays fast uniform battery pack that the embodiment of the present invention two provides.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
Embodiments of the invention one provide the equalizing circuit of switch arrays fast uniform battery pack, Fig. 1 is the structure chart of the embodiment of the present invention one, please refer to Fig. 1, this equalizing circuit comprises cell switch chooser circuit, conductive discharge combination electronic circuit, monomer voltage collection electronic circuit and switch control rule drive sub-circuits; Described cell switch chooser circuit needs the cell of electric discharge for connecting, described conductive discharge combination electronic circuit is used for the configuration of discharging current size, described monomer voltage gathers electronic circuit for gathering the actual voltage value often saving cell, and calculate the cell needing equilibrium, described switch control rule drive sub-circuits controls corresponding switch, carries out equilibrium to battery pack.
Described cell switch chooser circuit comprises multiple cell and multiple cell gating switch, described cell and cell gating switch are directly connected, when cell needs balanced, the cell gating switch that cell two ends connect is closed, by this joint cell access discharge loop below.
Described conductive discharge combination electronic circuit comprises multiple resistance and multiple resistance gating switch, and described resistance is connected with resistance gating switch, when the resistance gating switch corresponding with resistance closes, this resistance access discharge loop.
Described cell gating switch is made up of metal-oxide-semiconductor or solid-state relay.
Described resistance gating switch is made up of metal-oxide-semiconductor or solid-state relay.
Described monomer voltage Acquisition Circuit comprises controller and lithium ion battery special chip, described lithium ion battery special chip respectively with often save cell and connect, for gathering the voltage of each joint cell; Described controller processes the data collected, analyze and need balanced cell, then control switch controls drive sub-circuits, closed pair answers cell gating switch, the resistance gating switch of cell, cell and resistance is made to form discharge loop, to high-tension cell equalization discharge.
The present invention can realize more piece cell balanced discharge simultaneously by cell switch chooser circuit, when discharging, select the cell gating switch of closed cell switch chooser circuit, the resistance gating switch of fitting closure conductive discharge combination electronic circuit again, form discharge loop, realize the equilibrium to selected cell.
Embodiment two
Embodiments of the invention two provide a kind of control method of equalizing circuit of switch arrays fast uniform battery pack, and Fig. 2 is the method flow diagram of the embodiment of the present invention two, please refer to Fig. 2, and the method for the embodiment of the present invention comprises the following steps:
S101, after the low-voltage on battery management system is started working, gather electronic circuit by monomer voltage, measure the actual voltage value that battery pack often saves cell, and store;
S102, the monomer voltage collected to be sorted, calculate the most difference between high monomer voltage and minimum monomer voltage of battery pack, and the mean value between all cells calculating battery pack;
Mean value and the minimum monomer voltage of S103, all monomer voltages compare, if difference is less than needs open balanced threshold value, then the cell being less than mean value does not need to carry out equilibrium;
The mean value of S104, all monomer voltages and most high monomer voltage compare, if difference is less than the threshold value of needs equilibrium, then the battery being greater than mean value does not need to carry out equilibrium;
If the minimum monomer battery voltage of S105 and the difference of mean value are greater than the balanced threshold value of needs, find out and need balanced minimum cell numbering, then this cell numbering is above all needs equilibrium.
The present invention combines electronic circuit according to conductive discharge, corresponding resistance can be carried out parallel connection, thus the size of adjustment discharging current, simple to operate, flexible.In addition, cell switch chooser circuit of the present invention, conductive discharge combination electronic circuit can independent assortment, realizes the variation of control mode, meets the electric discharge demand under different mode.
Embodiment three
Embodiments of the invention three provide the control method of the equalizing circuit of switch arrays fast uniform battery pack, are the further improvement of the control method to embodiment 2, then composition graphs 1, and the concrete grammar of the present embodiment is:
S201, after the upper low-voltage of battery management system is started working, by monomer battery voltage Acquisition Circuit, measure battery pack and often save the actual voltage value of cell, and store;
S202, the monomer voltage collected to be sorted, calculate the most difference between high monomer voltage and minimum monomer voltage of battery pack, and the mean value between all cells calculating battery pack;
Be: the monomer voltage collected is placed in an one-dimension array adopt the method for selected and sorted to find out maximum and the minimum value of monomer voltage to the method that the monomer voltage collected sorts.
Mean value and the minimum monomer voltage of S203, all monomer voltages compare, if difference is less than needs open balanced threshold value, then the cell being less than mean value does not need to carry out equilibrium.The mean value of all monomer voltages and most high monomer voltage compare, if difference is less than the threshold value of needs equilibrium, then the battery being greater than mean value does not need to carry out equilibrium;
If the minimum monomer battery voltage of S204 and the difference of mean value are greater than the balanced threshold value of needs, find out and need balanced minimum battery numbering, then this battery numbering is above all needs equilibrium, and its concrete grammar is:
First most high monomer battery is discharged, such as first segment battery is most that batteries of high monomer voltage (combined circuit Fig. 1) now closed K1, K5 selects first segment battery, closed K14, K15, K16, K10, K11, K12, K13, the corresponding resistance gating switch of gating according to actual needs, thus determine the discharging current of cell, i.e. R1, R2, R3, R4, R5 parallel connection access discharge loop, discharge with maximum electric current, can the short time voltage drop of most high monomer battery be got off.
Then highly to discharge to secondary, if the pressure reduction of secondary high monomer voltage and mean value is greater than open threshold value 1, but be less than threshold value 2, so K2 can be closed, K6 (combined circuit Fig. 1 supposes that second section cell is for secondary high), so K14 can be closed, K15, K10, K11, K12, K13, i.e. R1, R2, R3, R5 parallel connection access discharge loop, the corresponding reduction of discharging current, discharge, described threshold value 1, threshold value 2 are all the balanced differences of opening of setting, and also namely open balanced condition, the grade of threshold value 1 is less than the grade of threshold value 2.
S205, successively circulation are until all voltage reaches the threshold requirement of setting.
Embodiment four
Embodiments of the invention four provide a kind of control method of equalizing circuit of switch arrays fast uniform battery pack, the difference of the control method of the embodiment of the present invention and the control method of above-described embodiment three is, combined circuit Fig. 1, if there are two joint cells to need equilibrium, and pressure reduction is no more than setting threshold 3 between this two joints cell, and balanced pressure reduction is all greater than setting threshold 1, be less than setting threshold 2, so can carry out equilibrium simultaneously.Such as closed K5, K6, K14 carry out balanced discharge to first segment cell; Closed K7, K8, K15, K16 carry out balanced discharge to Section of three cell simultaneously.
Embodiment five
Embodiments of the invention five provide a kind of control method of equalizing circuit of switch arrays fast uniform battery pack, and the difference of the control method of the embodiment of the present invention and the control method of above-described embodiment three is, combined circuit Fig. 1, if there is the adjacent cell of three joints to need equilibrium, and electric current needs little, such as first, two, three joints are closed K5 then, K8, K16, circuit R1, R4 forms discharge loop, carries out equilibrium.
It should be noted that at this, one of ordinary skill in the art will appreciate that all or part of step realized in above-described embodiment method is that the hardware that can carry out instruction relevant by program has come, described program can be stored in a computer read/write memory medium, described storage medium, as ROM/RAM, disk, CD etc.
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 (10)
1. an equalizing circuit for switch arrays fast uniform battery pack, is characterized in that, comprises cell switch chooser circuit, conductive discharge combination electronic circuit, monomer voltage collection electronic circuit and switch control rule drive sub-circuits; Described cell switch chooser circuit needs the cell of electric discharge for connecting, described conductive discharge combination electronic circuit is used for the configuration of discharging current size, described monomer voltage gathers electronic circuit for gathering the actual voltage value often saving cell, and calculate the cell needing equilibrium, described switch control rule drive sub-circuits controls corresponding switch, carries out the equilibrium to cell.
2. the equalizing circuit of switch arrays fast uniform battery pack according to claim 1, it is characterized in that, described cell switch chooser circuit comprises multiple cell and multiple cell gating switch, described cell and cell gating switch are directly connected, when cell needs balanced, the cell gating switch be connected with cell two ends is closed, by this joint cell access discharge loop below.
3. the equalizing circuit of switch arrays fast uniform battery pack according to claim 2, it is characterized in that, described conductive discharge combination electronic circuit comprises multiple resistance and multiple resistance gating switch, described resistance is connected with resistance gating switch, when the resistance gating switch corresponding with resistance closes, this resistance access discharge loop.
4. the equalizing circuit of switch arrays fast uniform battery pack according to claim 3, is characterized in that, described cell gating switch and resistance gating switch are by metal-oxide-semiconductor or solid-state relay composition.
5. the equalizing circuit of switch arrays fast uniform battery pack according to claim 1, it is characterized in that, described monomer voltage Acquisition Circuit comprises controller and lithium ion battery special chip, described lithium ion battery special chip respectively with often save cell and connect, for gathering the voltage of each joint cell; Described controller processes the data collected, analyze and need balanced cell, then control switch controls drive sub-circuits, closed pair answers cell gating switch, the resistance gating switch of cell, cell and resistance is made to form discharge loop, to high-tension cell equalization discharge.
6. the control method of the equalizing circuit of switch arrays fast uniform battery pack according to any one of claim 1-5, it is characterized in that, the method comprises the steps:
(1) after the low-voltage on battery management system is started working, gather electronic circuit by monomer voltage, measure the actual voltage value that battery pack often saves cell, and store;
(2) monomer voltage collected is sorted, calculate the most difference between high monomer voltage and minimum monomer voltage of battery pack, and the mean value between all cells calculating battery pack;
(3) mean value of all monomer voltages and minimum monomer voltage compare, if difference is less than needs open balanced threshold value, then the cell being less than mean value does not need to carry out equilibrium;
(4) mean value of all monomer voltages and most high monomer voltage compare, if difference is less than the threshold value of needs equilibrium, then the cell being greater than mean value does not need to carry out equilibrium;
(5) if minimum monomer battery voltage and the difference of mean value are greater than the balanced threshold value of needs, find out and need balanced minimum cell numbering, then this cell numbering is above all needs equilibrium.
7. the control method of the equalizing circuit of switch arrays fast uniform battery pack according to claim 6, it is characterized in that, in step (2), be: the monomer voltage collected is placed in an one-dimension array adopt the method for selected and sorted to find out maximum and the minimum value of monomer voltage to the method that the monomer voltage collected sorts.
8. the control method of the equalizing circuit of switch arrays fast uniform battery pack according to claim 6, is characterized in that, in step (5), balanced method is as follows:
(5-1) most high monomer battery is discharged, and according to discharge capacity by corresponding resistor parallel connection access discharge loop, discharge with maximum electric current;
(5-2) secondary high monomer battery is discharged, if the pressure reduction of secondary high monomer voltage and mean value is greater than open threshold value 1, but be less than threshold value 2, the then cell gating switch of the cell switch chooser circuit that closed time high monomer battery is corresponding, the resistance gating switch of the conductive discharge combination electronic circuit that closed time high monomer battery is corresponding simultaneously, by corresponding resistor coupled in parallel access discharge loop, discharge, described threshold value 1, threshold value 2 are all the balanced differences of opening of setting, also namely open balanced condition, the grade of threshold value 1 is less than the grade of threshold value 2;
(5-3) circulate until the voltage of all cells reaches the threshold requirement of setting successively.
9. the control method of the equalizing circuit of switch arrays fast uniform battery pack according to claim 6, it is characterized in that, in step (5), if there are two joint cells to need equilibrium, between this two joints cell, pressure reduction is no more than setting threshold 3, and balanced pressure reduction is all greater than setting threshold 1, be less than setting threshold 2, then equilibrium carried out to two joint cells simultaneously.
10. the control method of the equalizing circuit of switch arrays fast uniform battery pack according to claim 6, it is characterized in that, if there is the adjacent cell of three joints to need equilibrium, small area analysis is then adopted to carry out equilibrium, the cell gating switch of closed first segment and cell switch chooser circuit corresponding to Section of three cell, access the resistance gating switch of first segment and Section of three conductive discharge that cell is corresponding combination electronic circuit simultaneously, access corresponding resistor forms discharge loop, carries out equilibrium.
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Cited By (11)
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| CN106410296A (en) * | 2016-09-13 | 2017-02-15 | 深圳市沃特玛电池有限公司 | Power battery pack |
| CN106953386A (en) * | 2017-04-28 | 2017-07-14 | 镇江科信动力系统设计研究有限公司 | The passive balance control system and its control method of a kind of battery bag |
| CN108199439A (en) * | 2018-01-24 | 2018-06-22 | 浙江正电信息科技股份有限公司 | A kind of lithium ion battery balanced device |
| WO2018130020A1 (en) * | 2017-01-13 | 2018-07-19 | Gp Batteries International Limited | Power supply methods and apparatus |
| CN108832646A (en) * | 2018-06-11 | 2018-11-16 | 国网山东省电力公司 | A kind of management system and its method suitable for dynamically reconfigurable battery energy storage system |
| CN109638906A (en) * | 2018-12-03 | 2019-04-16 | 珠海格力电器股份有限公司 | A kind of battery management method, system and storage medium |
| CN110729798A (en) * | 2019-11-18 | 2020-01-24 | 溧阳中科海钠科技有限责任公司 | Control method and control system for voltage consistency of sodium ion battery pack |
| CN111009945A (en) * | 2019-12-25 | 2020-04-14 | 孚能科技(赣州)股份有限公司 | Photoelectric conversion-based battery pack equalization circuit and equalization method |
| CN112448433A (en) * | 2019-09-03 | 2021-03-05 | 苏州宝时得电动工具有限公司 | Electric tool |
| CN113394855A (en) * | 2021-07-22 | 2021-09-14 | 傲普(上海)新能源有限公司 | Centralized power-adjustable BMS passive equalization circuit |
| CN113466721A (en) * | 2021-08-31 | 2021-10-01 | 蜂巢能源科技有限公司 | Failure identification method and device for lithium ion battery, electronic equipment and medium |
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| CN106410296A (en) * | 2016-09-13 | 2017-02-15 | 深圳市沃特玛电池有限公司 | Power battery pack |
| WO2018130020A1 (en) * | 2017-01-13 | 2018-07-19 | Gp Batteries International Limited | Power supply methods and apparatus |
| CN106953386A (en) * | 2017-04-28 | 2017-07-14 | 镇江科信动力系统设计研究有限公司 | The passive balance control system and its control method of a kind of battery bag |
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| CN112448433A (en) * | 2019-09-03 | 2021-03-05 | 苏州宝时得电动工具有限公司 | Electric tool |
| CN110729798B (en) * | 2019-11-18 | 2021-01-29 | 溧阳中科海钠科技有限责任公司 | Control method and control system for voltage consistency of sodium ion battery pack |
| CN110729798A (en) * | 2019-11-18 | 2020-01-24 | 溧阳中科海钠科技有限责任公司 | Control method and control system for voltage consistency of sodium ion battery pack |
| CN111009945A (en) * | 2019-12-25 | 2020-04-14 | 孚能科技(赣州)股份有限公司 | Photoelectric conversion-based battery pack equalization circuit and equalization method |
| CN111009945B (en) * | 2019-12-25 | 2021-11-23 | 孚能科技(赣州)股份有限公司 | Photoelectric conversion-based battery pack equalization circuit and equalization method |
| CN113394855A (en) * | 2021-07-22 | 2021-09-14 | 傲普(上海)新能源有限公司 | Centralized power-adjustable BMS passive equalization circuit |
| CN113394855B (en) * | 2021-07-22 | 2023-07-18 | 傲普(上海)新能源有限公司 | Centralized power-adjustable BMS passive equalization circuit |
| CN113466721A (en) * | 2021-08-31 | 2021-10-01 | 蜂巢能源科技有限公司 | Failure identification method and device for lithium ion battery, electronic equipment and medium |
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