CN106655408B - Battery pack balancing control method and control device - Google Patents
Battery pack balancing control method and control device Download PDFInfo
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- CN106655408B CN106655408B CN201710067083.XA CN201710067083A CN106655408B CN 106655408 B CN106655408 B CN 106655408B CN 201710067083 A CN201710067083 A CN 201710067083A CN 106655408 B CN106655408 B CN 106655408B
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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
-
- 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
-
- 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 relates to battery pack balancing control method and control devices, when carrying out Balance route, the battery module for being initially completed charging during the charging process is obtained first, and it is initially completed the battery module of electric discharge during discharge, then judge whether the two battery modules are same battery modules, if not same battery module, then the energy transfer in the battery module of charging will be initially completed into the battery module for being initially completed electric discharge.The energy of two battery modules can be balanced in this way, improve the active volume of battery pack, realize the equilibrium of battery pack, and the balance control method is for the key point for influencing battery pack active volume, implement Balance route strategy as balanced condition using the key point, its is highly reliable, can effectively ensure that the equilibrium of battery pack.
Description
Technical field
The present invention relates to battery pack balancing control method and control devices.
Background technique
When energy source or energy-storage system energy storage carrier of the power lithium-ion battery as electric car, it usually needs
By in series and parallel in groups to meet system voltage, power and energy requirement.Under normal circumstances, battery pack includes that several are gone here and there simultaneously
Join the battery module of setting, each battery module includes a single battery or at least two single batteries.And after battery group
Due to the problem of inconsistency between battery, so that whole group performance is worse than the summation of single battery performance in group.Problem of inconsistency
Producing reason can be mainly divided into two major classes: (1) inconsistency of initial performance, due to technique and material in cell production process
The difference of matter, so that battery has differences in performances such as initial capacity, DC internal resistance, self-discharge rate and efficiency for charge-discharges；(2) at
On the one hand the inconsistency of group and use process is that the otherness of battery initial performance builds up and amplifies in use process,
On the other hand it is that battery use environment (temperature and ventilation condition etc.) has differences, each battery is caused to fail with different rates.With
The passage of time, battery pack problem of inconsistency will persistently aggravate, to seriously affect the actually available capacity of battery pack, use
Life and reliability.Battery pack balancing technology answers battery group as the main means for solving battery pack problem of inconsistency
With having great significance.
Realize that the core of this defencive function is the Balance route of battery pack.Balancing control circuit is generally divided into master at present
Balanced and passive equilibrium is moved, balancing control circuit usually influences equalization efficiency and cost of hardware design in essence, and balanced
Control strategy be only decision it is balanced whether effective core content.The country can not estimate SOC, SOH and electricity accurately still at present
The BMS of pond internal resistance, Balance route strategy is still based on Pressure and Control, but the otherness of lithium battery end voltage often can not
Internal inconsistency between accurate description lithium battery, i.e., the equilibrium based on end voltage can not really improve between lithium battery group
Consistency, this is also the major technology bottleneck for causing portfolio effect bad.
A kind of battery balanced energy turn is disclosed in the Chinese patent application file that application publication number is CN101872877A
The method of shifting first determines whether single battery ceiling voltage and minimum voltage reach the voltage difference of setting in battery pack, if reaching
To the voltage difference of setting, then start battery balanced energy transfer.Although this method can realize the equal of battery pack to a certain extent
Weighing apparatus, still, balanced Rule of judgment is the difference of ceiling voltage and minimum voltage, and reliability is lower.
Summary of the invention
The object of the present invention is to provide a kind of battery pack balancing control methods, to solve traditional battery pack equilibrium method
The lower problem of reliability.Present invention simultaneously provides a kind of cell balance control units.
To achieve the above object, the solution of the present invention includes a kind of battery pack balancing control method, including Balance route
The step of step, the Balance route includes:
(1) battery module for being initially completed charging during the charging process is obtained, is denoted as the first battery module, and discharging
It is initially completed the battery module of electric discharge in the process, is denoted as the second battery module；
(2) judge whether the first battery module and the second battery module are same battery modules；
(3) if not same battery module, then by the energy transfer in the first battery module into the second battery module；
Wherein, described to be initially completed charging and refer to: charge protection to occur at first or in charging complete previous moment voltage
Highest；It is described to be initially completed electric discharge and refer to: discharge prevention occurring at first or to complete previous moment voltage in electric discharge minimum.
The number of single battery in the battery module is one.
Before the Balance route the step of, the battery pack balancing control method further includes the judgement of capacity and voltage
The step of, the step of judgement of the capacity and voltage includes:
1) error amount for calculating the actually available capacity of battery pack and the capacity threshold of setting, is denoted as volume error value；
2) when the volume error value is more than or equal to the first threshold value of setting, any two battery module is calculated
The voltage error value of synchronization during the charging process or in discharge process；
3) when have in the voltage error value of any two battery module at least one voltage error value be more than or equal to set
When fixed second threshold value, the step of implementing the Balance route.
The synchronization is that previous moment is completed in charging complete previous moment or electric discharge.
If the first battery module and the second battery module are same battery modules, Balance route terminates, and determines the electricity
Pond module is fail battery module.
A kind of cell balance control unit, including equalization control module, the equalization control module include with lower unit:
Acquiring unit is denoted as the first battery module for obtaining the battery module for being initially completed charging during the charging process,
And it is initially completed the battery module of electric discharge during discharge, it is denoted as the second battery module；
Judging unit, for judging whether the first battery module and the second battery module are same battery modules；
Balanced unit is used for if not same battery module, then by the energy transfer in the first battery module to second
In battery module；
Wherein, described to be initially completed charging and refer to: charge protection to occur at first or in charging complete previous moment voltage
Highest；It is described to be initially completed electric discharge and refer to: discharge prevention occurring at first or to complete previous moment voltage in electric discharge minimum.
The number of single battery in the battery module is one.
The control device further includes capacity and voltage judgment module, and the capacity and voltage judgment module include to place an order
Member:
First processing units are remembered for calculating the error amount of the actually available capacity of battery pack and the capacity threshold of setting
For volume error value；
The second processing unit calculates when for being more than or equal to the first threshold value of setting when the volume error value
The voltage error value of any two battery module synchronization during the charging process or in discharge process；
Third processing unit, for when any two battery module voltage error value in have at least one voltage error value
More than or equal to setting the second threshold value when, implement Balance route.
The synchronization is that previous moment is completed in charging complete previous moment or electric discharge.
If the first battery module and the second battery module are same battery modules, Balance route terminates, and determines the electricity
Pond module is fail battery module.
In battery pack balancing control method provided by the invention, obtains charge protection occurs at first during the charging process first
Or in the highest battery module of charging complete previous moment voltage, it is denoted as the first battery module, and during discharge most
Discharge prevention first occurs or completes the minimum battery module of previous moment voltage in electric discharge, is denoted as the second battery module.Because
The two battery modules are exactly the key point for determining battery pack active volume, and using the two battery modules as Balance route
Foundation；Then, judge whether the two battery modules are same battery modules, if not same module, then the battery
Group just has improved space, that is initially completed energy transfer in the battery module of charging to the just by the first battery module
Two battery modules are initially completed the battery module of electric discharge, balance the energy of the two battery modules in this way, improve battery
The active volume of group, realizes the equilibrium of battery pack, so, this balance control method is for influence battery pack active volume
Key point implements Balance route strategy as balanced condition using the key point, highly reliable, can effectively ensure that electricity
The equilibrium of pond group.
In addition, that just illustrates the actually available appearance of the battery module if the first module and the second module are same modules
Measure very little, be constitute battery pack active volume short slab where, that it is determined that the battery module be malfunctioning module, so,
The balance control method may recognize that the fail battery module in battery pack, the positioning function with fail battery module,
The consistency and active volume of battery pack can be effectively improved, the safety and reliability that battery pack uses further is promoted.
Detailed description of the invention
Fig. 1 is battery pack balancing control principle schematic block diagram；
Fig. 2 is battery pack balancing control flow chart；
Fig. 3-a is the relational graph of battery pack active volume Yu each single battery；
Fig. 3-b is energy transfer schematic diagram；
Fig. 4 is balanced end flow chart.
Specific embodiment
Control method embodiment
As shown in Figure 1, it is battery pack balancing control principle block diagram of the present invention, which is intended merely to general description battery pack
The principle of Balance route, specific control process see below described.The basic unit of Balance route is battery module, in this implementation
In example, the number of the single battery in battery module is one, that is to say, that battery module is exactly single battery.
The voltage of battery pack and the information data of capacity are obtained first, wherein voltage data is battery pack in charge and discharge
The voltage of each single battery in journey, capacity data are the actually available charge/discharge capacity of battery pack.The acquisition of voltage data can
It is detected by voltage sensor；And capacity data be electric current and voltage are calculated, so, it is also necessary in electricity
Current sensor is arranged to detect the correlated current information of battery pack in Chi Zuzhong.Since voltage sensor and current sensor belong to
Routine techniques just no longer illustrates here moreover, the calculating of capacity also belongs to routine techniques.
The error amount of the capacity threshold of the actually available capacity of battery pack and setting is calculated, is made with the condition that the error amount meets
For balanced decision condition 1, wherein the capacity threshold of setting is generally the rated capacity of battery pack factory, also referred to as marked capacity,
But its rated capacity will decay battery pack after used a period of time, at this time, it is necessary to which school is carried out to rated capacity
Standard, then, the capacity threshold of setting is just the capacity after calibration.In addition, the calculation formula of the error amount of capacity can be with are as follows:
Volume error value percentage=(the actually available capacity of the capacity threshold-of setting)/setting capacity threshold
Balanced decision condition 1 is the size for the capacity threshold that volume error value and setting are compared in judgement, then, capacity misses
The capacity threshold that difference is more than or equal to setting represents balanced decision condition 1 and sets up.
The voltage error value in battery pack between each single battery is calculated, i.e. any two single battery in calculating battery pack
Voltage error value, using the voltage error value meet condition as equilibrium decision condition 2.Wherein, voltage error value can be
Difference between two voltage values, is also possible to ratio.Moreover, the accuracy in order to guarantee subsequent judgement, above-mentioned each monomer electricity
The voltage value in pond is the voltage value of synchronization, moreover synchronization is charge and discharge latter stage, i.e., before charging complete
Previous moment is completed in one moment or electric discharge.
Balanced decision condition 2 is the size for judging the voltage threshold of comparison voltage error amount and setting, then, any two
The voltage threshold for having at least one error amount to be more than or equal to setting in the voltage error value of a single battery represents
The decision condition 2 that weighs is set up.
Also, there is precedence relationships between balanced decision condition 1 and balanced decision condition 2, as shown in Fig. 2, first into
Then the acquisition of row associated voltage information and capacity information carries out the judgement of balanced decision condition 1, only in balanced decision condition
After 1 sets up, the judgement of balanced decision condition 2 is just carried out.And after balanced decision condition 2 is set up, following strategies is carried out:
During the charging process, the single battery that charging is initially completed in each single battery is found, wherein be initially completed charging
Refer to: the highest voltage in the voltage that charging process terminates each single battery of previous moment, alternatively, if battery pack has charging
Protection, then, being initially completed charging can also refer to that reach triggering charge protection at first (triggers charger in charging process at first
Protect threshold value).In the present embodiment, charging is initially completed to refer in the voltage that charging process terminates each single battery of previous moment
Highest voltage, then, finding in each single battery terminates the highest single battery of previous moment voltage in charging process, below
Provide a kind of specific means: detecting each single battery terminates the voltage of previous moment in charging process, by each voltage value according to electricity
The sequence of pressure from high to low is ranked up, and considers that there may be multiple cell voltages to be closer in real process, therefore in combination with real
Border efficient balance number sets voltage valid interval (such as 50mV) to improve equalization efficiency, then, from high to low according to voltage
The voltage of each single battery after sequence sequence is respectively as follows: UH1、UH2、UH3…UHN, then UH1For the highest voltage of voltage value, the electricity
Corresponding single battery is pressed to be defined as first single battery.
During discharge, the single battery that electric discharge is initially completed in each single battery is found, wherein be initially completed electric discharge
Refer to: the minimum voltage in the voltage that discharge process terminates each single battery of previous moment, alternatively, if battery pack has electric discharge
Protection, then, being initially completed electric discharge can also refer to that reach triggering discharge prevention at first (triggers electric discharge to protect at first i.e. in discharge process
Protect threshold value).In the present embodiment, electric discharge is initially completed to refer in the voltage that discharge process terminates each single battery of previous moment
Minimum voltage, then, finding in each single battery terminates the minimum single battery of previous moment voltage in discharge process, below
Provide a kind of specific means: detecting each single battery terminates the voltage of previous moment in discharge process, by each voltage value according to electricity
The sequence of pressure from low to high is ranked up, and considers that there may be multiple cell voltages to be closer in real process, therefore in combination with real
Border efficient balance number sets voltage valid interval (such as 50mV) to improve equalization efficiency, then, from low to high according to voltage
The voltage of each single battery after sequence sequence is respectively as follows: UL1、UL2、UL3…ULN, then UL1For the voltage that voltage value is minimum, the electricity
Corresponding single battery is pressed to be defined as second comonomer battery.
The acquisition process of above-mentioned first single battery and second comonomer battery, can be according to there is no strict sequence
Sequencing is arranged in actual conditions, can also carry out simultaneously.
For obtaining UH1And UL1Battery pack, it is clear that the actually available capacity of battery pack depend on UH1And UN1This two
Feature battery, as shown in Fig. 3-a in single battery A and C.
If first single battery and second comonomer battery are not identical single batteries, by first single battery
In energy transfer into second comonomer battery, to improve the active volume of entire battery pack, realize the balanced control of battery pack
System, as shown in Fig. 3-b.Wherein, the specific implementation means of energy transfer and realization circuit belong to the prior art, such as: back
Application documents disclosed in scape technology have certain explanation or entitled " the battery pack balancing module based on energy transfer
Research " paper in also have related description, so, just no longer illustrate here.
Therefore, balanced unlocking condition is determined by capacity difference, voltage difference and voltage ranking results, needs equilibrium when determining
After battery, as shown in connection with fig. 1, equalization instruction is exported by balanced judging unit, then Balance route is carried out by balanced executing agency.
As shown in figure 4, Balance route closedown condition by high capacity and low capacity feature battery whether be same battery Lai
Determine, i.e., for above-mentioned UH1、UH2、UH3…UHNAnd UL1、UL2、UL3…ULNSequence, when judgement first single battery and second comonomer
When battery is same battery, it is believed that this time Balance route terminates.It is completed earliest since the battery is charged and discharged, that is just said
The actually available capacity very little of the bright single battery is where constituting the short slab of battery pack active volume, that was it is determined that should
Monomer is short slab fail battery, and controller issues warning, and staff can also handle and replace to the single battery.Institute
With, which may recognize that the fail battery in battery pack, can effectively improve battery pack consistency and
Active volume.
In addition, in principle, carrying out Balance route, other batteries according to the single battery for being initially completed charging and discharging
It is not the factor of control, does not influence the progress of control, so, it is corresponding if there are two the voltages of other corresponding positions in sequence
Battery be the same battery if, such as: work as UH3And UL3When corresponding single battery is the same battery, due to the battery
It is not the factor for influencing the most critical of battery pack active volume, then, battery capacity still has improved space, the condition
It cannot function as balanced termination condition, then reject the battery, equilibrium is not carried out for the battery, then according to above-mentioned equilibrium side
Method carries out balanced.
The balance control method can simultaneously suitable for the passive balanced and active equalization of current mainstream, if passive equilibrium,
It then only needs to open U during the charging processH1、UH2、UH3…UHNThe passive equalizing circuit of battery pack, according to active equalization, by
There is no energy loss, euqalizing current larger in it, therefore whole in charge and discharge process can open equalizing circuit, more efficient completion
It is balanced.
Above-mentioned Balance route strategy is loaded in the controller in a manner of software program, which can be special setting
Control chip, can also be battery pack BMS.
In above-described embodiment, the detailed process of Balance route is given, the judgement of capacity is carried out first, then carries out voltage
Judgement, then carry out Balance routes according to two feature batteries, certainly, sentencing for capacity and voltage carried out before Balance route
It is disconnected, Balance route is just carried out when capacity and voltage have certain difference, certainly, inventive point of the invention is subsequent equal
Weighing apparatus control, the judgement for carrying out capacity and voltage before the equalization is more optimal embodiment, as general reality
Mode is applied, such as: the difference of capacity and voltage is not required, or has been carried out the judgement of capacity and voltage, this hair in advance
The balance control method of bright offer can directly carry out Balance route.
In above-described embodiment, the number of the single battery in battery module is 1, as other embodiments, when battery mould
When including at least two single batteries in block, Balance route, the implementation are carried out using battery module as a most basic unit
Under mode, the process of Balance route and the process of above embodiment are identical, just no longer illustrate here.
Control device embodiment
The present embodiment provides a kind of cell balance control unit, including equalization control module, equalization control module includes
With lower unit:
Acquiring unit is denoted as the first battery module for obtaining the battery module for being initially completed charging during the charging process,
And it is initially completed the battery module of electric discharge during discharge, it is denoted as the second battery module；
Judging unit, for judging whether the first battery module and the second battery module are same battery modules；
Balanced unit is used for if not same battery module, then by the energy transfer in the first battery module to second
In battery module；
Wherein, it is initially completed charging to refer to: charge protection occurring at first or in charging complete previous moment voltage highest；
It is initially completed electric discharge to refer to: discharge prevention or minimum in electric discharge completion previous moment voltage occurring at first.
So each unit in the control device is the software unit with corresponding implementation steps, by each software unit
Load is in the controller to realize corresponding function, and therefore, which is still substantially control method, due to the controlling party
Method, as describing in detail, just no longer illustrates here in above-mentioned control method embodiment.
Specific embodiment is presented above, but the present invention is not limited to described embodiment.Base of the invention
This thinking is above-mentioned basic scheme, and for those of ordinary skill in the art, various changes are designed in introduction according to the present invention
The model of shape, formula, parameter do not need to spend creative work.It is right without departing from the principles and spirit of the present invention
The change, modification, replacement and modification that embodiment carries out are still fallen in protection scope of the present invention.
Claims (10)
1. a kind of battery pack balancing control method, which is characterized in that include the steps that Balance route, the step of the Balance route
Include:
(1) battery module for being initially completed charging during the charging process is obtained, is denoted as the first battery module, and in discharge process
In be initially completed the battery module of electric discharge, be denoted as the second battery module；
(2) judge whether the first battery module and the second battery module are same battery modules；
(3) if not same battery module, then by the energy transfer in the first battery module into the second battery module；
Wherein, described to be initially completed charging and refer to: charge protection to occur at first or in charging complete previous moment voltage highest；
It is described to be initially completed electric discharge and refer to: discharge prevention occurring at first or to complete previous moment voltage in electric discharge minimum.
2. battery pack balancing control method according to claim 1, which is characterized in that the monomer electricity in the battery module
The number in pond is one.
3. battery pack balancing control method according to claim 1 or 2, which is characterized in that in the step of the Balance route
Before rapid, the battery pack balancing control method further includes the steps that the judgement of capacity and voltage, and the capacity and voltage are sentenced
Disconnected step includes:
1) error amount for calculating the actually available capacity of battery pack and the capacity threshold of setting, is denoted as volume error value；
2) it when the volume error value is more than or equal to the first threshold value of setting, calculates any two battery module and is filling
The voltage error value of synchronization in electric process or in discharge process；
3) when have in the voltage error value of any two battery module at least one voltage error value be more than or equal to setting
When the second threshold value, the step of implementing the Balance route.
4. battery pack balancing control method according to claim 3, which is characterized in that the synchronization is charging complete
Previous moment is completed in previous moment or electric discharge.
5. battery pack balancing control method according to claim 3, which is characterized in that if the first battery module and second
Battery module is same battery module, then Balance route terminates, and determines the battery module for fail battery module.
6. a kind of cell balance control unit, which is characterized in that including equalization control module, the equalization control module includes
With lower unit:
Acquiring unit is denoted as the first battery module for obtaining the battery module for being initially completed charging during the charging process, and
It is initially completed the battery module of electric discharge during discharge, is denoted as the second battery module；
Judging unit, for judging whether the first battery module and the second battery module are same battery modules；
Balanced unit is used for if not same battery module, then by the energy transfer in the first battery module to the second battery
In module；
Wherein, described to be initially completed charging and refer to: charge protection to occur at first or in charging complete previous moment voltage highest；
It is described to be initially completed electric discharge and refer to: discharge prevention occurring at first or to complete previous moment voltage in electric discharge minimum.
7. cell balance control unit according to claim 6, which is characterized in that the monomer electricity in the battery module
The number in pond is one.
8. cell balance control unit according to claim 6 or 7, which is characterized in that the control device further includes
Capacity and voltage judgment module, the capacity and voltage judgment module include with lower unit:
First processing units are denoted as appearance for calculating the error amount of the actually available capacity of battery pack and the capacity threshold of setting
Measure error amount；
The second processing unit when for being more than or equal to the first threshold value of setting when the volume error value, calculates any
The voltage error value of two battery modules synchronization during the charging process or in discharge process；
Third processing unit, for when any two battery module voltage error value in there is at least one voltage error value to be greater than
Or equal to setting the second threshold value when, implement Balance route.
9. cell balance control unit according to claim 8, which is characterized in that the synchronization is charging complete
Previous moment is completed in previous moment or electric discharge.
10. cell balance control unit according to claim 8, which is characterized in that if the first battery module and
Two battery modules are same battery modules, then Balance route terminates, and determine the battery module for fail battery module.
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| CN107785967A (en) * | 2017-11-21 | 2018-03-09 | 中航锂电（洛阳）有限公司 | Accumulation power supply system capacity balance control method, control device and equalizing system |
| CN109450022B (en) * | 2018-11-16 | 2021-10-15 | 东莞塔菲尔新能源科技有限公司 | Equalization method of battery pack |
| CN110880622A (en) * | 2019-10-15 | 2020-03-13 | 江西恒动新能源有限公司 | Equalization control method of battery pack |
| CN111864844B (en) * | 2020-07-27 | 2022-03-08 | 中创新航科技股份有限公司 | Equalization method and equalization device of battery system and intelligent equipment |
| CN113696786B (en) * | 2021-08-23 | 2023-05-23 | 深圳市道通科技股份有限公司 | Battery equalization method and system |
| CN116054349B (en) * | 2023-02-28 | 2023-09-01 | 深圳市比比赞科技有限公司 | Photovoltaic energy storage battery pack voltage control protection system |
| CN117081219B (en) * | 2023-10-17 | 2024-01-09 | 东方旭能(山东)科技发展有限公司 | EMS energy storage energy management system |
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| US9537327B2 (en) * | 2012-12-21 | 2017-01-03 | Lite-On Electronics (Guangzhou) Co., Ltd. | Battery cell balancing control system and battery management method thereof |
| CN105071546B (en) * | 2015-09-06 | 2017-03-29 | 张家港智电可再生能源与储能技术研究所有限公司 | The dump energy bearing calibration of lithium ion battery in a kind of power system energy storage station |
| CN105958570A (en) * | 2016-05-18 | 2016-09-21 | 中国矿业大学 | Lithium battery voltage balance circuit topology |
| CN106026260B (en) * | 2016-06-24 | 2018-06-26 | 南京航空航天大学 | A kind of series winding battery pack SOC estimation method with equalizing circuit |
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