CN115085301A - Battery equalization method, device, terminal and storage medium - Google Patents

Battery equalization method, device, terminal and storage medium Download PDF

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Publication number
CN115085301A
CN115085301A CN202110280430.3A CN202110280430A CN115085301A CN 115085301 A CN115085301 A CN 115085301A CN 202110280430 A CN202110280430 A CN 202110280430A CN 115085301 A CN115085301 A CN 115085301A
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China
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battery
equalization
balancing
equalized
monomer
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CN202110280430.3A
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Chinese (zh)
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郑林
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Evergrande New Energy Technology Shenzhen Co Ltd
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Evergrande New Energy Technology Shenzhen Co Ltd
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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
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention is applicable to the field of batteries, and provides a battery balancing method, a device, a terminal and a storage medium. The battery balancing method comprises the following steps: acquiring cycle parameter information of a battery pack, wherein the battery pack comprises a plurality of battery monomers; determining a target battery balance control mode from battery balance control modes according to the circulation parameter information, wherein the battery balance control modes at least comprise two battery balance control modes; controlling the battery pack to enter a target battery balance control mode; and according to the target battery balancing control mode, performing battery balancing on the battery monomer to be balanced. The battery balancing method provided by the embodiment of the invention can improve the flexibility of battery balancing.

Description

Battery equalization method, device, terminal and storage medium
Technical Field
The invention belongs to the field of batteries, and particularly relates to a battery balancing method, a battery balancing device, a terminal and a storage medium.
Background
Due to the limitation of the process conditions and the characteristic difference of the battery cells, each battery cell often has a difference in the amount of electricity or voltage. If a plurality of battery cells are used by forming a battery pack in a series-parallel connection mode, the difference between the battery cells in the battery pack becomes larger and larger as the number of charge and discharge cycles of the battery pack increases. Imbalance between the battery cells will reduce the available capacity of the entire battery pack, affecting the performance and life of the battery pack.
The cell balancing means that the deviation between the battery cells is maintained within a desired range to eliminate the unbalance between the battery cells. The existing battery balancing method generally performs battery balancing in a fixed mode, cannot adjust the battery balancing mode according to actual conditions, and has the problem of low flexibility.
Disclosure of Invention
The embodiment of the invention provides a battery equalization method, a battery equalization device, a terminal and a storage medium, which can solve the problem of low flexibility of the existing battery equalization method.
A first aspect of an embodiment of the present invention provides a battery balancing method, including: acquiring cycle parameter information of a battery pack, wherein the battery pack comprises a plurality of battery monomers; determining a target battery balance control mode from battery balance control modes according to the circulation parameter information, wherein the battery balance control modes at least comprise two battery balance control modes; controlling the battery pack to enter a target battery balance control mode; and according to the target battery balancing control mode, performing battery balancing on the battery monomer to be balanced.
In the embodiment of the invention, the target battery equalization control mode is determined from the battery equalization control modes according to the circulation parameter information, and the battery pack is controlled to enter the target battery equalization control mode, so that the battery equalization is carried out on the battery monomer to be equalized according to the target battery equalization control mode, so that the terminal can select different battery equalization control modes according to the current circulation parameter information in the process of carrying out the battery equalization on the battery pack, and the flexibility of the battery equalization is improved.
In a possible implementation manner of the first aspect, the determining a target battery balancing control mode from battery balancing control modes according to the cycle parameter information at least includes: if the historical cycle number is less than or equal to a first cycle number threshold value M, determining that the target battery balance control mode is a first balance control mode; correspondingly, according to the target battery equalization control mode, performing battery equalization on the battery monomer to be equalized, including: and if the target battery equalization control mode is the first equalization control mode, determining the battery monomer to be equalized according to the monomer voltage or the monomer capacity of the plurality of battery monomers, and performing battery equalization on the battery monomer to be equalized.
In a possible implementation manner of the first aspect, the determining a target battery balancing control mode from battery balancing control modes according to the cycle parameter information at least includes: if the historical cycle number is larger than a first cycle number threshold M and smaller than a second cycle number threshold N, determining that the target battery balance control mode is a second balance control mode; correspondingly, according to the target battery equalization control mode, performing battery equalization on the battery monomer to be equalized, including: if the target battery equalization control mode is the second equalization control mode, historical equalization parameters of the battery pack are obtained, and the historical equalization parameters are battery equalization parameters of the battery pack in an equalization period with historical cycle times smaller than or equal to a first cycle time threshold M; determining a single battery to be equalized and the time length to be equalized in the battery pack according to the historical equalization parameters of the battery pack, and performing battery equalization on the single battery to be equalized according to the time length to be equalized.
In the embodiment of the invention, the measurement of the characteristic parameters of the single battery, such as voltage, capacity, current and the like, can be avoided by starting at the (M + 1) th equalization period, and the efficiency of battery equalization is effectively improved.
In a possible implementation manner of the first aspect, after performing battery equalization on the battery cell to be equalized according to the time length to be equalized, the method further includes: and updating the historical cycle times, and clearing the historical cycle times if the updated historical cycle times are greater than a second cycle time threshold N. According to the embodiment of the invention, the accumulated error of the battery pack in the previous M balancing periods can be reduced, and the precision of battery balancing is improved.
In a possible implementation manner of the first aspect, the historical balancing parameter includes a total balancing number of each battery cell in the battery pack in a balancing period in which the historical cycle number is less than or equal to the first cycle number threshold M; the above determining the battery monomer to be equalized and the time length to be equalized in the battery pack according to the historical equalization parameters of the battery pack includes: calculating the ratio of the total equalization times of each battery monomer to a first cycle time threshold value M; and determining the battery monomer with the ratio greater than or equal to the preset ratio as the battery monomer to be equalized so as to screen out the battery monomer to be equalized.
In a possible implementation manner of the first aspect, the number of the battery cells to be equalized is plural; carry out battery equalization to treating balanced battery monomer, include: determining a first battery balancing sequence of each battery cell to be balanced according to the corresponding ratio of each battery cell to be balanced; and according to the first battery balancing sequence, performing battery balancing on each battery monomer to be balanced, and then preferentially performing battery balancing on the battery monomer to be balanced, which has a large influence on the service performance of the battery pack.
In a possible implementation manner of the first aspect, the number of the battery cells to be equalized is plural; carry out battery equalization to treating balanced battery monomer, include: acquiring the position of each battery monomer to be balanced in the battery pack; determining a second battery balancing sequence of each battery monomer to be balanced according to the position of each battery monomer to be balanced in the battery pack; according to the second battery equalization sequence, battery equalization is performed on each battery monomer to be equalized, so that the battery equalization processes of the battery monomers to be equalized which are close in position are performed separately, local high temperature caused by battery equalization performed on the battery monomers to be equalized which are close in position at the same time is avoided, and safety and effectiveness of battery equalization are improved.
In a possible implementation manner of the first aspect, in the process of performing battery equalization on the battery cells to be equalized, the method further includes: detecting whether a battery monomer to be balanced meets a balance pause condition; if the single battery to be balanced meets the balancing suspension condition, the balancing of the battery of the single battery to be balanced is suspended, so that the balancing of the battery can be suspended under the dangerous condition through the suspension of the balancing of the battery, and the safety and the effectiveness of the balancing of the battery are guaranteed.
A second aspect of the embodiments of the present invention provides a battery balancing apparatus, including:
the battery pack comprises a plurality of battery monomers, an acquisition unit and a control unit, wherein the acquisition unit is used for acquiring cycle parameter information of the battery pack;
the determining unit is used for determining a target battery balance control mode from the battery balance control modes according to the circulation parameter information, and the battery balance control modes at least comprise two battery balance control modes;
the control unit is used for controlling the battery pack to enter a target battery equalization control mode;
and the balancing unit is used for carrying out battery balancing on the battery monomer to be balanced according to the target battery balancing control mode.
A third aspect of embodiments of the present invention provides a terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the method when executing the computer program.
A fourth aspect of the embodiments of the present invention provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the computer program implements the steps of the above method.
A fifth aspect of embodiments of the present invention provides a computer program product, which when running on a terminal, enables the terminal to perform the steps of the method.
It is understood that the beneficial effects of the second aspect to the fifth aspect can be referred to the related description of the first aspect, and are not described herein again.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic diagram of an implementation flow of a battery equalization method according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a specific implementation flow of a battery equalization method according to an embodiment of the present invention;
fig. 3 is a schematic view of a life cycle of a battery pack provided by an embodiment of the present invention;
fig. 4 is a schematic flowchart of a first specific implementation of step S104 according to the embodiment of the present invention;
fig. 5 is a schematic flowchart of a second specific implementation of step S104 according to the embodiment of the present invention;
fig. 6 is a schematic structural diagram of a battery equalization apparatus according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
Detailed Description
Due to the limitation of the process conditions and the characteristic difference of the battery cells, each battery cell often has a difference in the amount of electricity or voltage. If a plurality of battery cells are used in a battery pack formed by series-parallel connection, the difference between the battery cells in the battery pack becomes larger and larger as the number of charge and discharge cycles of the battery pack increases. Imbalance between the battery cells will reduce the available capacity of the entire battery pack, affecting the performance and life of the battery pack.
The cell balancing means that the deviation between the battery cells is maintained within a desired range to eliminate the unbalance between the battery cells. The existing battery balancing method generally performs battery balancing in a fixed mode, and cannot adjust the battery balancing mode according to actual conditions, so that the problem of low flexibility exists.
Based on the above, the invention provides a battery balancing method, a device, a terminal and a storage medium, wherein the battery pack is controlled to enter different target battery balancing modes by using the circulation parameter information of the battery pack, so that the battery pack can adopt different battery balancing modes in different balancing periods, and the flexibility of battery balancing is improved.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Fig. 1 is a schematic diagram illustrating an implementation flow of a battery balancing method according to an embodiment of the present invention, where the method may be applied to a terminal and may be applied to a situation where efficiency of battery balancing needs to be improved.
The terminal may be a terminal equipped with a battery pack, such as an electric vehicle or an electric bicycle.
Specifically, the above battery equalization method may include the following steps S101 to S104.
Step S101, obtaining circulation parameter information of the battery pack.
Wherein, above-mentioned group battery includes a plurality of battery monomer. The cycle parameter information refers to an equalization cycle parameter for battery equalization of the battery pack. An equalization period may refer to a process of full charge and discharge of the battery pack at one time, where the battery pack is full charge at one time when the accumulated charge amount reaches a preset charge amount threshold and full discharge at one time when the accumulated discharge amount reaches a preset discharge amount threshold. The charge amount threshold value and the discharge amount threshold value can be adjusted according to actual conditions.
In the embodiment of the invention, the terminal performs battery equalization on at least one battery cell in the battery pack in one equalization period. In addition, in one balancing cycle, one single battery in the battery pack generally only needs to perform complete battery balancing once, but based on safety considerations, in one balancing cycle, complete battery balancing once can be performed in multiple stages. That is, a cell may trigger multiple cell balancing within one balancing cycle, and the result of the multiple cell balancing is one complete cell balancing. Therefore, when a cell triggers a plurality of cell balances within a balance period, the total number of cell balances is increased only once.
And step S102, determining a target battery balance control mode from the battery balance control modes according to the circulation parameter information.
In an embodiment of the present invention, the battery equalization control mode includes at least two battery equalization control modes. The battery equalization modes corresponding to each battery equalization control mode may be different. According to the current circulation parameter information of the battery pack, a target battery balance control mode corresponding to the circulation parameter information can be determined from at least two battery balance control modes, so that the terminal can flexibly select a battery balance mode according to the circulation parameter information.
And step S103, controlling the battery pack to enter a target battery equalization control mode.
Specifically, after the target battery balancing control mode is determined, the terminal may control the battery pack to enter the target battery balancing control mode, so as to perform battery balancing in a corresponding manner.
And step S104, carrying out battery equalization on the battery monomer to be equalized according to the target battery equalization control mode.
The battery monomer to be balanced refers to a battery monomer which needs to be subjected to battery balancing in the battery pack at present.
Optionally, when the number of the battery cells to be balanced is multiple, the battery balancing may be performed on each battery cell to be balanced in the battery pack until each battery cell to be balanced completes the battery balancing.
It should be noted that, the present invention does not limit the specific implementation manner of battery equalization, and in some embodiments of the present invention, the battery equalization may be completed by charging or discharging the battery cells to be equalized.
In the embodiment of the invention, the target battery equalization control mode is determined from the battery equalization control modes according to the circulation parameter information, and the battery pack is controlled to enter the target battery equalization control mode, so that the battery equalization is carried out on the battery monomer to be equalized according to the target battery equalization control mode, so that the terminal can select different battery equalization control modes according to the current circulation parameter information in the process of carrying out the battery equalization on the battery pack, and the flexibility of the battery equalization is improved.
Specifically, in some embodiments of the present invention, the loop parameter information at least includes a historical number of loops. In this case, the determining the target battery balancing control mode from the battery balancing control modes according to the cycle parameter information may include: and if the historical cycle number is less than or equal to the first cycle number threshold value M, determining that the target battery balance control mode is the first balance control mode.
The historical cycle number refers to the number of equalization cycles performed by the current battery pack.
Correspondingly, the determining the battery cell to be equalized and the time length to be equalized in the battery pack according to the target battery equalization control mode may include: and if the target battery equalization control mode is the first equalization control mode, determining the battery monomer to be equalized according to the monomer voltage or the monomer capacity of the plurality of battery monomers, and performing battery equalization on the battery monomer to be equalized.
That is, in the embodiment of the present invention, when the historical number of cycles is less than or equal to the first threshold number of cycles M, it may be determined that the target battery equalization control mode is the first equalization control mode, and the battery pack may be controlled to enter the first equalization control mode. After the battery pack enters a first equalization control mode, the terminal can acquire the single voltage of a plurality of battery monomers and perform battery equalization on the battery monomers to be equalized according to the single voltage of the plurality of battery monomers; or, the cell capacities of the plurality of battery cells may be acquired, and battery equalization may be performed on the battery cells to be equalized according to the cell capacities of the plurality of battery cells. The value of the first cycle threshold M may be adjusted according to actual conditions.
Specifically, the performing of the battery equalization on the battery cell to be equalized according to the cell voltages of the plurality of battery cells may include: and calculating the voltage difference between the voltage of each single battery in the battery pack and the average single battery voltage of all the single batteries in the battery pack, and screening out the single batteries with the voltage differences meeting the voltage difference condition from the battery pack as the single batteries to be balanced for battery balancing. For example, cells having a voltage difference greater than a voltage difference threshold may be screened from the battery pack. Moreover, the single batteries to be balanced can be further screened out according to other safety limiting conditions such as whether the single batteries are overcharged or overdischarged. And then, carrying out battery equalization on the battery cells to be equalized until the voltage difference between all the battery cell voltages and the minimum battery cell voltage is less than or equal to a voltage difference threshold value, or the voltage of each battery cell is equal to a preset voltage value.
Specifically, the performing of the battery equalization on the battery cells to be equalized according to the cell capacities of the plurality of battery cells may include: and calculating the capacity difference between the capacity of each single battery in the battery pack and the minimum capacity of all the single batteries, and screening out the single batteries with the capacity difference meeting the balance capacity difference condition from the battery pack as the single batteries to be balanced for battery balancing. For example, cells having a capacity difference greater than a capacity difference threshold may be screened from the battery pack. And moreover, the battery monomer to be balanced can be further screened out according to other safety limiting conditions such as whether the battery monomer is overcharged or overdischarged. And then, carrying out battery equalization on the battery cells to be equalized until the duration of the battery equalization on each battery cell to be equalized is equal to the duration of the battery equalization required by the battery cell to be equalized. Wherein, the time length t of each battery cell to be equalized needing equalization 2 Δ C denotes a capacity difference between the capacity of the battery cell to be equalized and the minimum capacity among all the battery cells, and I denotes an equalizing current, which may be measured based on experiments.
Also, in some embodiments of the present invention, in the process of performing battery equalization according to cell voltages or cell capacities of a plurality of battery cells, a battery equalization order of the battery cells to be equalized may be adjusted based on the above-described voltage difference or capacity difference.
Specifically, as the battery monomer with larger voltage difference or capacity difference has larger influence on the service performance of the whole battery pack, the battery monomer to be equalized with larger voltage difference or capacity difference can be preferentially subjected to battery equalization, and then the battery monomer to be equalized with smaller voltage difference or capacity difference is subjected to battery equalization.
In another embodiment of the present invention, the determining the target battery balancing control mode from the battery balancing control modes according to the cycle parameter information may further include: and if the historical cycle number is larger than the first cycle number threshold M and smaller than the second cycle number threshold N, determining that the target battery balance control mode is the second balance control mode.
The second threshold N may be selected according to actual conditions.
Correspondingly, according to the target battery equalization control mode, determining a battery monomer to be equalized and a time length to be equalized in the battery pack, including: if the target battery balance control mode is the second balance control mode, acquiring historical balance parameters of the battery pack; determining a single battery to be equalized and the time length to be equalized in the battery pack according to the historical equalization parameters of the battery pack, and performing battery equalization on the single battery to be equalized according to the time length to be equalized.
The historical balancing parameters are battery balancing parameters of the battery pack in a balancing period with the historical cycle number smaller than or equal to a first cycle number threshold M.
Specifically, in the first M balancing periods, when one battery cell triggers one or more times of battery balancing in one balancing period in the process of performing battery balancing by the terminal according to the voltage or the capacity of each battery cell in the battery pack, the total balancing times of the battery cell is increased once, and the total balancing duration is increased by the duration of performing battery balancing in the balancing period. After M balancing cycles, each single battery in the battery pack has the corresponding total balancing times and total balancing duration, and then historical balancing parameters are obtained. In addition, the total balancing times and the total balancing duration of each battery can be stored in a memory of the terminal according to a preset storage strategy in each balancing cycle, and finally, historical balancing parameters are obtained. Starting from the (M + 1) th equalization cycle, the terminal can read historical equalization parameters from the memory, namely, the total equalization times and the total equalization duration of each battery cell in the battery pack in the previous M equalization cycles, so as to perform battery equalization according to the historical equalization parameters.
In the embodiment of the invention, according to the historical equalization parameters of the battery pack, the battery monomer to be equalized in the battery pack in the current equalization period is determined based on the total equalization times and the total equalization time of each battery monomer in the battery pack in M equalization periods, and the time to be equalized for the battery monomer to be equalized to be subjected to battery equalization is calculated.
Specifically, in some embodiments of the present invention, the historical equalization parameter may include a total equalization number of each battery cell in the battery pack in an equalization period in which the historical cycle number is less than or equal to the first cycle number threshold M. The determining of the single battery to be equalized and the time length to be equalized in the battery pack according to the historical equalization parameters of the battery pack may include: calculating the ratio of the total equalization times of each battery monomer to a first cycle time threshold value M; and determining the battery monomer with the ratio greater than or equal to the preset ratio as the battery monomer to be balanced.
That is to say, when a single battery cell is in an equalization period in which the historical cycle number is less than or equal to the first cycle number threshold M, the ratio of the total number of equalization periods that trigger battery equalization to the M equalization periods exceeds a preset ratio, which indicates that the possibility that the single battery cell needs to be subjected to battery equalization in the current equalization period is higher, and therefore, the single battery cell in which the ratio is greater than or equal to the preset ratio can be determined as the single battery cell to be equalized.
In an optional embodiment of the present invention, the preset ratio may be set to 50%.
In other embodiments of the present invention, battery cells to be equalized may also be screened out from the battery pack according to the equalization parameters in other manners, for example, a battery cell whose total equalization frequency is greater than a preset frequency threshold may be determined as a battery cell to be equalized, or a battery cell whose total equalization time is greater than a preset time threshold may also be determined as a battery cell to be equalized.
After the battery monomer to be equalized is determined, the time length to be equalized, during which the battery cell to be equalized needs to be subjected to battery equalization in the current equalization period, may be calculated according to the total equalization time length of the battery monomer to be equalized in the equalization period in which the historical cycle number is less than or equal to the first cycle number threshold M.
In particular, in some embodiments of the present invention, t may be according to formula 1 And calculating the time length to be equalized of the battery cell to be equalized as T/b. Wherein, t 1 To indicate a waitThe method includes the steps that battery balancing needs to be conducted on a balancing battery monomer in a current balancing period to achieve balancing, T represents the total balancing time of the battery monomer to be balanced in M balancing periods, and b represents the total balancing times of the battery monomer to be balanced in M balancing periods.
In other embodiments of the present invention, the time length to be equalized corresponding to the battery cell to be equalized may also be calculated according to the equalization parameter in other manners.
In the embodiment of the present invention, after the time length to be equalized of the battery cell to be equalized is calculated, the battery cell to be equalized may be subjected to battery equalization according to the time length to be equalized. If the number of the screened battery monomers to be equalized is more than one, calculating the time length to be equalized of each battery monomer to be equalized, which needs to be subjected to battery equalization, according to the calculation mode of the equalization time length, and performing battery equalization on each battery monomer to be equalized.
In practical application, characteristic parameters such as voltage, capacity and current of a battery cell are difficult to accurately measure, so that a lot of time is consumed to perform experimental test in a laboratory, the efficiency of the whole battery equalization process is reduced, and the possibility of error equalization exists.
In the embodiment of the invention, when the target battery equalization control mode is the second equalization control mode, the battery monomer needing equalization in the battery pack and the equalization time for performing battery equalization on the battery monomer are calculated by utilizing the historical equalization parameters of the battery pack, and the battery monomer needing equalization is subjected to battery equalization according to the obtained equalization time, so that the measurement on the characteristic parameters of the battery monomer, such as voltage, capacity, current and the like, is not required in the battery equalization process, and the efficiency of battery equalization can be effectively improved.
Moreover, since the process of measuring the characteristic parameters such as voltage, capacity, current, etc. needs to be performed under the condition that the circuit is stable, if the characteristic parameters are measured under the unstable condition, the calculated equalization parameters are easy to make mistakes, which causes the problem of false equalization.
The method provided by the invention can avoid the problem of low precision of the equalization parameters caused by the measurement error of the characteristic parameters, and meanwhile, because the method provided by the invention can carry out battery equalization according to the historical equalization parameters of a plurality of equalization cycles, the influence generated by a few equalization cycles with wrong equalization problems in the plurality of equalization cycles can be reduced, and the precision of the battery equalization is effectively improved.
In other embodiments of the present invention, after performing battery equalization on the battery cells to be equalized according to the time period to be equalized, the method may further include: and updating the historical cycle times, and clearing the historical cycle times if the updated historical cycle times are greater than a second cycle time threshold N.
That is, the value of the history cycle number needs to be updated after each battery equalization. The updating of the historical cycle number may refer to adding one to the historical cycle number.
When the historical cycle number is N, the terminal enters a second equalization control mode, the battery monomer to be equalized and the time length to be equalized in the battery pack are determined according to the historical equalization parameters of the battery pack, and then battery equalization is performed on the battery monomer to be equalized according to the time length to be equalized. After the battery equalization is performed, the value of the historical cycle number needs to be increased by one, and at this time, since the updated historical cycle number is greater than the second cycle number threshold N, the historical cycle number can be cleared.
Specifically, fig. 2 shows a corresponding implementation flow diagram. From the beginning of the first equalization period, the terminal can acquire historical cycle times, and if the historical cycle times are less than or equal to a first cycle time threshold value M, battery equalization is performed according to the voltage or capacity of each battery monomer in the battery pack, and the historical cycle times are updated; and if the historical cycle number is greater than the first cycle number threshold M and less than the second cycle number threshold N, performing battery equalization according to the historical equalization parameters corresponding to the first equalization period to the Mth equalization period, and updating the historical cycle number. And if the updated historical cycle number is larger than the second cycle number threshold N, resetting the historical cycle number, clearing the historical balancing parameters, balancing the battery pack for M balancing cycles according to the voltage or the capacity of each battery monomer in the battery pack, and obtaining the balancing parameters of the battery pack again in N-M cycles after the balancing of the battery in the M balancing cycles is completed.
Due to the characteristic difference of the battery monomers, the difference between the battery monomers is larger and larger along with the increase of the equalization period, and the battery monomer which needs to be subjected to battery equalization and the corresponding time length to be equalized in each equalization period may also be changed. In the embodiment of the invention, through the circulation of M balancing periods for balancing the battery according to the voltage or the capacity of each battery in the battery pack and N-M balancing periods for balancing the battery according to the balancing parameters of the previous M balancing periods, the accumulated error of the battery pack in the N-M balancing periods can be reduced, and the precision of battery balancing is improved.
That is to say, in the (N + 1) th equalization cycle, if the battery equalization is performed according to the equalization parameters of the (1) th to (M) th equalization cycles, the error between the determined battery cell to be equalized and the corresponding time length to be equalized and the actual situation is larger, but the method provided by the invention can restart the battery equalization according to the voltage or capacity of each battery cell in the battery pack in the (N + 1) th equalization cycle, and avoid the error based on the cycle of the N equalization cycles for multiple times.
It should be noted that the specific values of M and N may be subjected to basic experimental calibration according to actual items, and an appropriate value is selected to ensure the validity of the equalization parameter in each cycle, so as to improve the accuracy of battery equalization control.
For convenience of understanding, fig. 3 shows a life cycle diagram of a battery pack, and M equalization cycles for performing battery equalization according to the voltage or the capacity of each battery cell in the battery pack and N-M equalization cycles for performing battery equalization according to the equalization parameters of the preceding M equalization cycles may be sequentially performed in the life cycle of one battery pack.
In the embodiment of the invention, the battery pack is controlled to enter different battery balancing control modes through historical cycle times, so that the flexibility of battery balancing can be improved, and the efficiency of battery balancing can be improved while the accuracy of battery balancing is ensured in the life cycle of the battery pack.
Example two
Based on the consideration of the safety of the battery cells and other factors, on the basis of the first embodiment, the process of performing battery equalization on the battery cells to be equalized can be adjusted according to actual conditions, so as to optimize the battery equalization in each equalization period.
Specifically, in some embodiments of the present invention, as shown in fig. 4, the battery equalization of the battery cells to be equalized in the first embodiment and the second embodiment, step S104, may further include the following steps S401 to S402.
Step S401, determining a first battery balancing sequence of each battery cell to be balanced according to a corresponding ratio of each battery cell to be balanced.
Step S402, according to the first battery balancing sequence, battery balancing is carried out on each battery monomer to be balanced.
In some embodiments of the present invention, when the ratio of the total balancing times of the battery cells to be balanced to the first cycle time threshold M is larger, it indicates that the battery cells to be balanced have more battery balancing times in M balancing cycles, which indicates that the battery cells to be balanced have a higher possibility of battery balancing in the current balancing cycle, and also indicates that the battery cells to be balanced have a greater influence on the service performance of the entire battery pack, therefore, the first battery equalization sequence of each battery cell to be equalized can be determined according to the corresponding ratio of the battery cell to be equalized, and according to the first battery equalization sequence, performing battery equalization on each battery cell to be equalized so as to ensure that the battery cell to be equalized with a larger ratio of the total equalization times to the first cycle time threshold value M preferentially performs battery equalization, and then preferentially carrying out battery equalization on the single batteries to be equalized, which have great influence on the service performance of the battery pack.
In other embodiments of the present invention, as shown in fig. 5, the performing battery equalization on the battery cell to be equalized may include: the following steps S501 to S503.
Step S501, the position of each battery cell to be equalized in the battery pack is obtained.
Step S502, determining a second battery balancing sequence of each battery monomer to be balanced according to the position of each battery monomer to be balanced in the battery pack.
And step S503, carrying out battery equalization on each battery cell to be equalized according to the second battery equalization sequence.
Because the battery monomers are often placed side by side and then fixed when the battery pack is used, and the battery monomers are connected through the conducting wires, when the battery monomers to be balanced are in the process of battery balancing, the heat of the battery monomers to be balanced is released to cause the ambient temperature to rise, therefore, when the battery balancing is simultaneously carried out on a plurality of battery monomers to be balanced which are close to each other, the local temperature will rise rapidly, and dangerous events such as fire disasters are easily caused.
Therefore, in some embodiments of the present invention, a second battery balancing sequence of each battery cell to be balanced may be determined according to a position of each battery cell to be balanced in the battery pack, and the battery balancing process of the battery cells to be balanced may be separately performed by performing battery balancing on the battery cells to be balanced according to the second battery balancing sequence of each battery cell to be balanced.
Specifically, in some embodiments of the present invention, the adjacent relationship between the battery cells to be equalized may be determined according to the position of each battery cell to be equalized in the battery pack, the battery cells to be equalized having the adjacent relationship are divided into different battery equalization groups, and then the battery equalization is performed on each battery equalization group in sequence.
In other embodiments of the present invention, when the battery cells to be equalized are placed side by side, each battery cell from left to right may be numbered in sequence starting from 1. And then, according to the number of each battery cell to be equalized, the battery cells to be equalized with the odd number and the battery cells to be equalized with the even number are separated for battery equalization.
In the embodiment of the invention, the sequence of battery equalization is adjusted for a plurality of battery monomers to be equalized according to the position of each battery monomer to be equalized in the battery pack, so that the battery equalization processes of the battery monomers to be equalized with similar positions can be separately carried out, local high temperature caused by battery equalization for the battery monomers to be equalized with similar positions at the same time is avoided, and the safety and effectiveness of the battery equalization are improved.
It should be noted that, in some embodiments of the present invention, a battery balancing order may be determined by combining the position of each battery cell to be balanced in the battery pack and the ratio of the total balancing number corresponding to each battery cell to be balanced to N. For example, the battery balancing sequence of each battery cell to be balanced may be determined according to the ratio corresponding to the battery cell to be balanced, then the battery balancing sequence may be adjusted according to the position of each battery cell to be balanced in the battery pack, and the battery balancing may be performed on the battery cells to be balanced according to the adjusted battery balancing sequence.
In other embodiments of the present invention, in the process of performing battery equalization on the battery cells to be equalized, the method may further include: detecting whether a battery monomer to be balanced meets a balance pause condition; and if the single battery to be balanced meets the balancing suspension condition, suspending the battery balancing of the single battery to be balanced.
The above-mentioned equalization pause condition may be a condition related to safety in use, such as a battery pack internal temperature, a battery pack external temperature, or a battery pack insulation characteristic condition.
Taking the equalization pause condition as an example to illustrate, the internal temperature of the battery pack may increase the temperature around the battery cell to be equalized due to heat release of the battery cell to be equalized in the battery equalization process. When the temperature in the battery pack where the single battery to be balanced is detected to exceed a preset first temperature threshold, the current internal temperature of the battery pack is in a high-temperature state, and if the battery balancing is continued, dangerous events such as fire disasters and the like can be caused along with further increase of the temperature, so that the condition that the single battery to be balanced meets the balancing suspension condition can be confirmed, and the battery balancing of the single battery to be balanced is suspended.
Correspondingly, in some embodiments of the present invention, after suspending the cell balancing of the cell to be balanced, the method may further include: detecting whether the battery monomer to be balanced meets a balance recovery condition; and if the single battery to be equalized meets the equalization recovery condition, recovering the battery equalization of the single battery to be equalized until the time length for performing the battery equalization on the single battery to be equalized is equal to the time length to be equalized corresponding to the single battery to be equalized.
The equalization resuming condition may be a condition corresponding to the equalization suspending condition, such as a battery pack internal temperature, a battery pack external temperature, or a battery pack insulation characteristic condition.
Taking the equalization condition as the internal temperature of the battery pack as an example, when the internal temperature of the battery pack where the battery monomer to be equalized is located is detected to be lower than a preset second temperature threshold, the internal temperature of the battery pack is indicated to be in a non-high temperature state, it can be determined that the battery monomer to be equalized meets the equalization recovery condition, and the battery equalization of the battery monomer to be equalized is recovered. Wherein the second temperature threshold is lower than the first temperature threshold.
The battery pack can work in a safe state by suspending and resuming the battery equalization in a circulating manner until the time length for performing the battery equalization on the battery monomer to be equalized is equal to the time length for equalizing, corresponding to the battery monomer to be equalized, and the battery equalization of the battery monomer to be equalized in the current equalization period is finished.
In other embodiments of the present invention, the equalization pause condition may also be a condition related to an equalization time, for example, a duration of time that the battery has been equalized in the current equalization period. Accordingly, the equalization resuming condition may be a condition related to a time for suspending the cell equalization, for example, a duration of suspending the cell equalization.
For example, the duration to be equalized may be divided into a plurality of sub-durations to be equalized in advance, and if the duration for performing battery equalization is equal to the sub-duration to be equalized, it may be determined that the battery cell to be equalized satisfies the equalization suspension condition, and the battery equalization of the battery cell to be equalized is suspended; if the duration of the battery balancing suspension is equal to the preset suspension time, it can be determined that the battery monomer to be balanced meets the balancing recovery condition, the battery balancing of the battery monomer to be balanced is recovered, and the process is circulated continuously until the time for performing the battery balancing on the battery monomer to be balanced is equal to the time for performing the battery balancing on the battery monomer to be balanced.
In the embodiment of the invention, the battery pack can suspend the battery equalization under dangerous conditions by cyclically suspending and resuming the battery equalization, and the battery equalization is restarted under safe conditions until the time length for performing the battery equalization on the battery monomer to be equalized is equal to the time length for performing the battery equalization corresponding to the battery monomer to be equalized, so that the battery equalization of the battery monomer to be equalized is completed, and the safety and the effectiveness of the battery equalization are ensured.
It should be noted that for simplicity of description, the aforementioned method embodiments are all presented as a series of combinations of acts, but those skilled in the art will appreciate that the present invention is not limited by the order of acts described, as some steps may occur in other orders in accordance with the present invention.
EXAMPLE five
As shown in fig. 6, which is a schematic structural diagram of a battery equalization apparatus 600 according to an embodiment of the present invention, the battery equalization apparatus 600 is configured on a terminal. The battery balancing apparatus 600 may include:
an obtaining unit 601, configured to obtain cycle parameter information of a battery pack, where the battery pack includes a plurality of battery cells;
a determining unit 602, configured to determine a target battery balancing control mode from battery balancing control modes according to the cycle parameter information, where the battery balancing control modes at least include two battery balancing control modes;
a control unit 603 for controlling the battery pack to enter a target battery equalization control mode;
and the balancing unit 604 is configured to perform battery balancing on the battery cells to be balanced according to the target battery balancing control mode.
In some embodiments of the present invention, the loop parameter information at least includes a historical number of loops, and the determining unit 602 is further configured to: if the historical cycle number is less than or equal to a first cycle number threshold value M, determining that the target battery balance control mode is a first balance control mode; correspondingly, the balancing unit 604 is further configured to determine a battery cell to be balanced according to the cell voltages or the cell capacities of the plurality of battery cells and perform battery balancing on the battery cell to be balanced if the target battery balancing control mode is the first balancing control mode.
In some embodiments of the present invention, the loop parameter information at least includes a historical number of loops, and the determining unit 602 is further configured to: if the historical cycle number is larger than a first cycle number threshold M and smaller than a second cycle number threshold N, determining that the target battery balance control mode is a second balance control mode; accordingly, the equalizing unit 604 is further configured to: if the target battery equalization control mode is the second equalization control mode, historical equalization parameters of the battery pack are obtained, and the historical equalization parameters are battery equalization parameters of the battery pack in an equalization period with historical cycle times smaller than or equal to a first cycle time threshold M; determining a single battery to be equalized and the time length to be equalized in the battery pack according to the historical equalization parameters of the battery pack, and performing battery equalization on the single battery to be equalized according to the time length to be equalized.
In some embodiments of the present invention, the equalizing unit 604 is further configured to: and updating the historical cycle times, and clearing the historical cycle times if the updated historical cycle times are greater than a second cycle time threshold N.
In some embodiments of the present invention, the historical balancing parameters include a total balancing number of each battery cell in the battery pack in a balancing period in which the historical cycle number is less than or equal to the first cycle number threshold M; the equalizing unit 604 may further be configured to: calculating the ratio of the total equalization times of each battery monomer to a first cycle time threshold value M; and determining the battery monomer with the ratio greater than or equal to the preset ratio as the battery monomer to be balanced.
In some embodiments of the present invention, the number of the battery cells to be equalized is plural; the equalizing unit 604 may further be configured to: determining a first battery balancing sequence of each battery monomer to be balanced according to the corresponding ratio of each battery monomer to be balanced; and according to the first battery balancing sequence, performing battery balancing on each battery monomer to be balanced.
In some embodiments of the present invention, the number of the battery cells to be equalized is plural; the equalizing unit 604 may further be configured to: acquiring the position of each battery monomer to be balanced in the battery pack; determining a second battery balancing sequence of each battery monomer to be balanced according to the position of each battery monomer to be balanced in the battery pack; and according to the second battery balancing sequence, carrying out battery balancing on each battery monomer to be balanced.
In some embodiments of the present invention, the equalizing unit 604 may further be configured to: detecting whether a battery monomer to be balanced meets a balance pause condition; and if the single battery to be balanced meets the balancing suspension condition, suspending the battery balancing of the single battery to be balanced.
It should be noted that, for convenience and brevity of description, the specific working process and beneficial effects of the battery balancing apparatus 600 may refer to the corresponding processes of the methods in the first embodiment and the second embodiment, and are not described herein again.
EXAMPLE six
Fig. 7 is a schematic diagram of a terminal according to an embodiment of the present invention. The terminal 7 may comprise the battery pack described above, and may include: a processor 70, a memory 71, and a computer program 72, such as a battery equalization program, stored in the memory 71 and operable on the processor 70. The processor 70, when executing the computer program 72, implements the steps in the various battery equalization method embodiments described above, such as steps S101-S104 shown in fig. 1. Alternatively, the processor 70, when executing the computer program 72, implements the functions of the modules/units in the above-described apparatus embodiments, such as the functions of the acquisition unit, the determination unit, the control unit, and the equalization unit shown in fig. 6.
The computer program may be divided into one or more modules/units, which are stored in the memory 71 and executed by the processor 70 to accomplish the present invention. One or more modules/units may be a series of computer program instruction segments capable of performing certain functions, the instruction segments being used to describe the execution of the computer program in the terminal.
For example, the computer program may be divided into: the device comprises an acquisition unit, a determination unit, a control unit and an equalization unit. The specific functions of each unit are as follows: the battery pack comprises a plurality of battery monomers, an acquisition unit and a control unit, wherein the acquisition unit is used for acquiring cycle parameter information of the battery pack; the determining unit is used for determining a target battery balance control mode from the battery balance control modes according to the circulation parameter information, and the battery balance control modes at least comprise two battery balance control modes; the control unit is used for controlling the battery pack to enter a target battery equalization control mode; and the balancing unit is used for carrying out battery balancing on the single batteries to be balanced according to the target battery balancing control mode.
The terminal may include, but is not limited to, a processor 70, a memory 71. It will be appreciated by those skilled in the art that fig. 7 is only an example of a terminal and is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or different components, e.g., a terminal may also include input output devices, network access devices, buses, etc.
The Processor 70 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 71 may be an internal storage unit of the terminal, such as a hard disk or a memory of the terminal. The memory 71 may also be an external storage device of the terminal, such as a plug-in hard disk provided on the terminal, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like. Further, the memory 71 may also include both an internal storage unit and an external storage device of the terminal. The memory 71 is used for storing computer programs and other programs and data required by the terminal. The memory 71 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules, so as to perform all or part of the functions described above. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal and method may be implemented in other ways. For example, the above-described apparatus/terminal embodiments are merely illustrative, and for example, a module or a unit may be divided into only one type of logical function, and may be implemented in another manner, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium and used by a processor to implement the steps of the above-described embodiments of the method. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, in accordance with legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunications signals.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims (11)

1. A method of battery equalization, comprising:
acquiring cycle parameter information of a battery pack, wherein the battery pack comprises a plurality of battery monomers;
determining a target battery balance control mode from battery balance control modes according to the circulation parameter information, wherein the battery balance control modes at least comprise two battery balance control modes;
controlling the battery pack to enter a target battery balancing control mode;
and performing battery equalization on the battery monomer to be equalized according to the target battery equalization control mode.
2. The battery equalization method according to claim 1, wherein the loop parameter information includes at least a historical number of loops, and the determining a target battery equalization control mode from among the battery equalization control modes according to the loop parameter information includes: if the historical cycle number is less than or equal to a first cycle number threshold value M, determining that the target battery balance control mode is a first balance control mode;
correspondingly, the performing battery equalization on the battery monomer to be equalized according to the target battery equalization control mode includes:
and if the target battery balancing control mode is the first balancing control mode, determining the battery monomer to be balanced according to the monomer voltage or the monomer capacity of the plurality of battery monomers, and performing battery balancing on the battery monomer to be balanced.
3. The battery equalization method according to claim 2, wherein the loop parameter information includes at least a historical number of loops, and the determining a target battery equalization control mode from the battery equalization control modes according to the loop parameter information includes: if the historical cycle number is larger than the first cycle number threshold M and smaller than a second cycle number threshold N, determining that the target battery balance control mode is a second balance control mode;
correspondingly, the performing battery equalization on the battery monomer to be equalized according to the target battery equalization control mode includes:
if the target battery equalization control mode is the second equalization control mode, acquiring historical equalization parameters of the battery pack, wherein the historical equalization parameters are battery equalization parameters of the battery pack in an equalization period with historical cycle times smaller than or equal to a first cycle time threshold value M;
determining a single battery to be equalized and a time length to be equalized in the battery pack according to the historical equalization parameters of the battery pack, and performing battery equalization on the single battery to be equalized according to the time length to be equalized.
4. The battery balancing method according to claim 3, wherein after the battery balancing of the battery cells to be balanced according to the length of time to be balanced, the method further comprises:
and updating the historical cycle times, and clearing the historical cycle times if the updated historical cycle times are greater than a second cycle time threshold N.
5. The battery equalization method according to claim 3, wherein the historical equalization parameters include a total equalization number of the respective battery cells in the battery pack in an equalization period in which a historical cycle number is less than or equal to a first cycle number threshold M;
the determining of the single battery to be equalized and the time length to be equalized in the battery pack according to the historical equalization parameters of the battery pack comprises the following steps:
calculating the ratio of the total equalization times of each battery cell to a first cycle time threshold value M;
and determining the battery monomer with the ratio greater than or equal to a preset ratio as the battery monomer to be equalized.
6. The battery equalization method according to claim 5, wherein the number of the battery cells to be equalized is plural; the battery equalization of the battery monomer to be equalized comprises the following steps:
determining a first battery balancing sequence of each battery cell to be balanced according to a corresponding ratio of each battery cell to be balanced;
and according to the first battery balancing sequence, performing battery balancing on each battery monomer to be balanced.
7. The battery equalization method according to any one of claims 1 to 5, wherein the number of the battery cells to be equalized is plural; the battery equalization of the battery monomer to be equalized comprises the following steps:
acquiring the position of each battery monomer to be balanced in the battery pack;
determining a second battery balancing sequence of each battery monomer to be balanced according to the position of each battery monomer to be balanced in the battery pack;
and according to the second battery balancing sequence, performing battery balancing on each battery monomer to be balanced.
8. The battery equalization method according to any one of claims 1 to 6, wherein in the process of performing battery equalization on the battery cells to be equalized, the method further comprises the following steps:
detecting whether the battery monomer to be balanced meets a balance pause condition;
and if the single battery to be balanced meets the balancing suspension condition, suspending the battery balancing of the single battery to be balanced.
9. A battery equalization apparatus, comprising:
the battery pack comprises an acquisition unit, a storage unit and a control unit, wherein the acquisition unit is used for acquiring cycle parameter information of a battery pack, and the battery pack comprises a plurality of single batteries;
the determining unit is used for determining a target battery balance control mode from battery balance control modes according to the circulation parameter information, wherein the battery balance control modes at least comprise two battery balance control modes;
the control unit is used for controlling the battery pack to enter a target battery equalization control mode;
and the balancing unit is used for carrying out battery balancing on the single batteries to be balanced according to the target battery balancing control mode.
10. A terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1 to 8 when executing the computer program.
11. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 8.
CN202110280430.3A 2021-03-16 2021-03-16 Battery equalization method, device, terminal and storage medium Pending CN115085301A (en)

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