CN112541260B - Battery equalization control method, system, storage medium and electronic equipment - Google Patents
Battery equalization control method, system, storage medium and electronic equipment Download PDFInfo
- Publication number
- CN112541260B CN112541260B CN202011425016.9A CN202011425016A CN112541260B CN 112541260 B CN112541260 B CN 112541260B CN 202011425016 A CN202011425016 A CN 202011425016A CN 112541260 B CN112541260 B CN 112541260B
- Authority
- CN
- China
- Prior art keywords
- battery
- capacitance
- balanced
- real
- equalization
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 72
- 238000004590 computer program Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004891 communication Methods 0.000 description 8
- 238000001816 cooling Methods 0.000 description 4
- 230000005236 sound signal Effects 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- KLDZYURQCUYZBL-UHFFFAOYSA-N 2-[3-[(2-hydroxyphenyl)methylideneamino]propyliminomethyl]phenol Chemical compound OC1=CC=CC=C1C=NCCCN=CC1=CC=CC=C1O KLDZYURQCUYZBL-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013528 artificial neural network Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 201000001098 delayed sleep phase syndrome Diseases 0.000 description 1
- 208000033921 delayed sleep phase type circadian rhythm sleep disease Diseases 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- 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
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- Evolutionary Computation (AREA)
- Computer Hardware Design (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a battery balance control method, a battery balance control system, a storage medium and electronic equipment, and relates to the technical field of battery management systems. The method comprises the following steps: obtaining the average capacitance and the target capacitance of the battery pack according to the capacitance of each cell; determining a target cell meeting a preset condition as a cell to be balanced, wherein the preset condition comprises that a first parameter of the target cell is within a preset balancing mark threshold range, and the capacitance of the target cell is larger than the average capacitance and the target capacitance; obtaining the equalization time length of the battery cell to be equalized according to the capacitance of the battery cell to be equalized and the preset equalization current; and finally, balancing the battery cells to be balanced within the balancing duration. The invention solves the problem that the traditional battery passive equalization scheme is easy to excessively equalize or erroneously equalize, and achieves the technical effects of improving the energy utilization rate of the battery and prolonging the service life of the battery.
Description
Technical Field
The present invention relates to the field of battery management systems, and in particular, to a battery balancing control method, a system, a storage medium, and an electronic device.
Background
The consistency difference of the manufacturing process exists when the battery pack leaves the factory, and the capacity consistency of the battery pack is different along with the influence of the running time and the self-discharge in the use process, so that the battery pack needs to be balanced to ensure the consistency of the whole life cycle of the battery. The current mainstream battery balancing method comprises active balancing and passive balancing, wherein a balancing scheme of the passive balancing comprises voltage balancing and capacity balancing, and the starting of the voltage balancing is started in real time and closed in real time through a voltage difference; the capacity equalization is controlled to be opened and closed by the SOC difference.
At present, the passive balance control in the power battery system calculates the average residual capacity of each cell in the power battery system through the residual charge capacity and voltage difference dissimilarity of the cells at the charge end, and controls the cells with higher than the average residual capacity in the power battery system so as to perform dissipation discharge on the cells with high residual capacity in the next charge-discharge cycle; according to the scheme, the balancing time of each day is improved to 8 to 10 hours from the original few minutes, so that the efficiency of passive balancing is improved, the risk of excessive balancing and false balancing is easy to occur, the stability of the battery is not facilitated, and the energy utilization rate of the battery is reduced.
Therefore, the existing battery passive equalization scheme has the technical problem of excessive equalization or false equalization.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art.
Disclosure of Invention
The main purpose of the invention is that: the battery equalization control method, the system, the storage medium and the electronic equipment are provided, and the technical problem that the battery passive equalization scheme in the prior art is easy to cause excessive equalization or false equalization is solved.
The technical scheme adopted by the invention is as follows:
To achieve the above object, in a first aspect, the present invention provides a battery equalization control method, comprising the steps of:
acquiring a first parameter and a capacitance of each electric core in the battery pack;
obtaining the minimum capacitance and the average capacitance of the battery pack according to the capacitance of each battery cell;
obtaining a target capacitance of the battery pack according to the minimum capacitance;
Determining a target cell meeting preset conditions as a cell to be balanced, wherein the preset conditions comprise: the first parameter of the target battery cell is in a preset balance mark threshold range, and the capacitance of the target battery cell is larger than the average capacitance and the target capacitance;
Obtaining the equalization time length of the battery cell to be equalized according to the capacitance of the battery cell to be equalized and preset equalization current;
and balancing the battery cells to be balanced within the balancing duration of the battery cells to be balanced.
Optionally, in the above battery equalization control method, the first parameter includes a real-time voltage, a real-time temperature, a real-time current, and a standing time period;
The step of determining the target cell meeting the preset condition as the cell to be balanced specifically comprises the following steps:
judging whether the real-time voltage, the real-time temperature, the real-time current and the standing time length of the target battery cell are all within the corresponding preset balance mark threshold value range or not;
When the real-time voltage, the real-time temperature, the real-time current and the standing time length of the target battery cell are all within the preset marking threshold value range, further judging whether the capacitance of the target battery cell is larger than the average capacitance and the target capacitance;
And if the capacitance of the target battery cell is larger than the average capacitance and larger than the target capacitance, determining the target battery cell as the battery cell to be balanced.
Optionally, in the above battery equalization control method, after the step of obtaining the equalization duration of the battery cell to be equalized according to the capacitance of the battery cell to be equalized and a preset equalization current, the method further includes:
And storing the number corresponding to the cell to be balanced and the balancing duration thereof.
Optionally, in the above battery equalization control method, the step of equalizing the to-be-equalized battery cell in the equalization duration of the to-be-equalized battery cell specifically includes:
and in the process of carrying out balanced discharge on the battery cells to be balanced, if the battery pack is powered down, interrupting the balancing and storing the number corresponding to the battery cells to be balanced and the residual balancing duration.
Optionally, in the above battery equalization control method, the step of equalizing the to-be-equalized battery cell in the equalization duration of the to-be-equalized battery cell specifically includes:
Judging whether a second parameter of the battery cell to be balanced is in a preset equalization execution threshold range or not according to the stored number corresponding to the battery cell to be balanced;
and if the second parameter of the stored battery cell to be balanced is within a preset balanced execution threshold range, balancing the battery cell to be balanced according to the residual balanced time length of the stored battery cell to be balanced.
Optionally, in the battery equalization control method, the second parameter includes a real-time voltage and a real-time temperature;
the step of judging whether the second parameter of the battery cell to be balanced is within a preset equalization execution threshold according to the stored number corresponding to the battery cell to be balanced specifically comprises the following steps:
acquiring the real-time voltage and the real-time temperature of the battery cell to be balanced according to the stored serial numbers of the battery cells to be balanced;
Judging whether the real-time voltage and the real-time temperature of the battery cell to be balanced are both in a corresponding preset balancing execution threshold range;
And if the second parameter of the stored battery cell to be balanced is within a preset balanced execution threshold range, balancing the battery cell to be balanced according to the remaining balanced duration of the stored battery cell to be balanced, wherein the balancing step specifically comprises the following steps:
and when the real-time voltage and the real-time temperature of the stored battery cells to be balanced are both in the corresponding preset balanced execution threshold ranges, balancing the battery cells to be balanced according to the residual balanced time length of the stored battery cells to be balanced.
Optionally, in the above battery equalization control method, after the step of equalizing the to-be-equalized battery cells within the equalization duration of the to-be-equalized battery cells, the method further includes:
and when the balance duration time is finished, clearing the stored number corresponding to the battery cell to be balanced, and ending the balance.
In a second aspect, the present invention provides a battery equalization control system, the system comprising:
the parameter acquisition module is used for acquiring a first parameter of each electric core in the battery pack;
The electric capacity module is connected with the parameter acquisition module and is used for obtaining the electric capacity of each electric core according to the first parameter of each electric core and obtaining the minimum electric capacity and the average electric capacity of the battery pack according to the electric capacity of each electric core;
The target capacitance module is connected with the capacitance module and is used for obtaining the target capacitance of the battery pack according to the minimum capacitance;
And the balancing marking module is connected with the parameter acquisition module and the target capacitance module and is used for determining a target cell meeting preset conditions as a cell to be balanced, wherein the preset conditions comprise: the first parameter of the target battery cell is in a preset balance mark threshold range, and the capacitance of the target battery cell is larger than the average capacitance and the target capacitance;
the equalization duration module is connected with the equalization marking module and is used for obtaining the equalization duration of the battery cell to be equalized according to the capacitance of the battery cell to be equalized and the preset equalization current;
And the equalization execution module is connected with the equalization duration module and is used for equalizing the battery cells to be equalized in the equalization duration of the battery cells to be equalized.
In a third aspect, the present invention provides a storage medium having stored thereon a computer program executable by one or more processors to implement a battery equalization control method as described above.
In a fourth aspect, the present invention provides an electronic device comprising a memory and a processor, the memory having stored thereon a computer program which, when executed by the processor, performs a battery equalization control method as described above.
The one or more technical schemes provided by the invention have at least the following advantages or technical effects:
According to the battery equalization control method, the system, the storage medium and the electronic equipment, the target electric capacity is set according to the minimum electric capacity of the battery pack, the target electric core which meets the first parameter and is larger than the average electric capacity and the target electric capacity is determined to be the electric core to be equalized, the uniformity of battery equalization is guaranteed, excessive equalization and error equalization are prevented, after the equalization time length of the electric core to be equalized is obtained according to the electric capacity of the electric core to be equalized and the preset equalization current, the electric core to be equalized is subjected to equalization discharge within the equalization time length of the electric core to be equalized, the uniformity difference caused by different battery delivery specifications and different battery service lives is reduced while sufficient equalization electric quantity is guaranteed, and the technical effects of improving the energy utilization rate of the battery and prolonging the service life of the battery are achieved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings may be obtained from the drawings provided without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a battery equalization control method according to a first embodiment of the present invention;
Fig. 2 is another flow chart of a battery equalization control method according to a second embodiment of the present invention;
Fig. 3 is a schematic functional block diagram of a battery equalization control system according to a third embodiment of the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; there may be communication between the interior of the two elements or interaction between the two elements unless explicitly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Analysis of the prior art has found that at present, there are problems with passive equalization control schemes designed based on ensuring battery life and ensuring balance of battery non-uniformity and equalization amount. For example, in the voltage difference equalization scheme adopted in the battery charging process, when the battery capacity difference and the internal resistance difference are large, due to the limitation of equalization conditions, the consistency of the battery pack cannot be ensured under the conditions of insufficient equalization time and equalization current, and particularly, the influence at the end of the service life of the battery is more obvious. For another example, the capacity balance control in the power battery system calculates the average residual capacity of each cell in the power battery system through the residual charge capacity and the voltage difference dissimilarity of the cells at the charge end, and controls the cells with higher than the average residual capacity in the power battery system so as to perform dissipation discharge on the cells with high residual capacity in the next charge-discharge cycle; the scheme does not limit the equalization current and the equalization time by adopting the equalization capacity, and the risk of excessive equalization is easy to occur, for example, a certain battery cell needs equalization at the initial stage of service life due to inconsistent capacity and needs protection at the end stage of service life due to too fast self-discharge, at the moment, the equalization can be kept in the whole service life period by adopting the scheme, the risk of error equalization can occur, the stability of the battery is not facilitated, and the energy utilization rate of the battery is reduced.
In view of the technical problem that the passive equalization scheme of the battery in the prior art is easy to cause excessive equalization or error equalization, the invention provides a battery equalization control method, and the general thought is as follows:
Acquiring a first parameter and a capacitance of each electric core in the battery pack; obtaining the minimum capacitance and the average capacitance of the battery pack according to the capacitance of each battery cell; obtaining a target capacitance of the battery pack according to the minimum capacitance; determining a target cell meeting preset conditions as a cell to be balanced, wherein the preset conditions comprise: the first parameter of the target battery cell is in a preset balance mark threshold range, and the capacitance of the target battery cell is larger than the average capacitance and the target capacitance; obtaining the equalization time length of the battery cell to be equalized according to the capacitance of the battery cell to be equalized and preset equalization current; and balancing the battery cells to be balanced within the balancing duration of the battery cells to be balanced.
Through the technical scheme, the uniformity of battery equalization and the effectiveness of the battery cells to be equalized are guaranteed, the situations of excessive equalization and error equalization are effectively prevented, sufficient equalization electric quantity can be guaranteed, the uniformity difference caused by different factory specifications and different battery lives of the batteries is reduced, and the energy utilization rate of the batteries is improved.
Example 1
Referring to fig. 1, fig. 1 is a schematic flow chart of a battery balancing control method according to the present invention, and this embodiment provides a battery balancing control method for a power battery system of a new energy automobile, for controlling passive balancing in a charging process of the power battery, so as to keep a voltage deviation of a battery pack within an expected range, thereby ensuring that each single battery core maintains the same state during normal use, avoiding overcharge and overdischarge, and directly improving the method based on the existing hardware of the power battery system of the automobile.
The battery equalization control method provided in this embodiment is described in detail below with reference to fig. 1, and specifically includes the following steps:
Step 101: and acquiring a first parameter and a capacitance of each cell in the battery pack.
When the automobile using the power battery stops running and needs to be charged, after a user inserts a power line, the battery pack is connected with the charging equipment to start charging, and the battery pack is electrified, and at the moment, the first parameter and the electric capacity of each electric core in the battery pack are collected.
Specifically, the battery pack includes a plurality of groups of battery cells connected in series, and a first parameter and a capacitance are collected for each individual battery cell, where the first parameter may be set according to an actual operation requirement of the power battery, for example, in an implementation manner, the first parameter of the embodiment may include working parameters such as a real-time voltage, a real-time temperature, a real-time current, and the like, and include a cooling time period or a standing time period of the battery pack, where the standing time period may be a time period when the automobile stops running to collect parameters; in another implementation manner, the first parameter of this embodiment may include working parameters such as a real-time voltage, a real-time temperature, a real-time current, and the like, and include a cooling duration or a standing duration of the battery pack, and may further include detection results such as detecting whether the battery pack has a fault, whether the equalization circuit has a fault, and the like.
The State of charge (SOC) is used to reflect the remaining capacity of the battery, and the capacity cannot be directly measured, but can be estimated by parameters such as the terminal voltage, the charge-discharge current, and the internal resistance of the battery. The parameters are also affected by various uncertain factors such as battery aging, environmental temperature change, automobile running state and the like, so that after the real-time first parameters are obtained, the electric capacity of each electric core is calculated, and the calculation method can be a traditional calculation method such as a discharge test method, an ampere-hour metering method, a battery internal resistance method, an open-circuit voltage method, a load voltage method and the like, or can be a calculation method such as a Kalman filtering method, a fuzzy logic theory method, a neural network method and the like, and is specifically selected according to the actual condition of the power battery or according to the set first parameters.
Step 102: and obtaining the minimum capacitance and the average capacitance of the battery pack according to the capacitance of each cell.
Because the actual capacitance of each cell is not unique and constant, the actual capacitance can be reduced or lost along with the use, and therefore, after the capacitances of all the cells are collected, the minimum capacitance can be obtained, and then the average capacitance of the battery pack can be calculated according to the capacitances of all the cells.
Step 103: and obtaining the target capacitance of the battery pack according to the minimum capacitance.
In the implementation process, the target capacitance can be specifically set according to the specification of the power battery system, and the standard of the target capacitance is adopted instead of directly using the original capacitance or the actual capacitance of a certain cell, so that the uniformity of battery equalization can be ensured, and the excessive equalization of cells with small capacitance can be prevented.
The target capacitance may be a multiple of the minimum capacitance, or may be set by directly adding a fixed value to the minimum capacitance, and the specific multiple value or the added value may be set according to the actual situation of the power battery system, for example, the target capacitance may be 1.02 times the minimum capacitance.
Step 104: determining a target cell meeting preset conditions as a cell to be balanced, wherein the preset conditions comprise: the first parameter of the target battery cell is within a preset balance mark threshold range, and the capacitance of the target battery cell is larger than the average capacitance and the target capacitance.
Specifically, a single battery cell is used as a target battery cell, preset conditions are judged on the target battery cell, first, whether a first parameter of the target battery cell is in a corresponding preset balance mark threshold range is judged, wherein the preset balance mark threshold range is set according to the actual condition of a power battery system, and after the type of the first parameter is determined, the balance mark threshold range is correspondingly set for the single parameter in the first parameter; then, whether the capacitance of the target battery cell meets the preset capacitance condition is judged, namely, the capacitance of the target battery cell is larger than the average capacitance and is larger than the target capacitance.
In one embodiment, the determination of the target cell satisfying the preset condition as the cell to be equalized may be achieved by the following steps 104.1 to 104.3:
Step 104.1: and judging whether the real-time voltage, the real-time temperature, the real-time current and the standing time length of the target battery cell are all within the corresponding preset balance mark threshold range.
In a specific implementation process, after determining that the first parameter includes a real-time voltage, a real-time temperature, a real-time current and a standing time period, and after setting corresponding balance mark threshold ranges according to the parameters, judging, wherein the preset balance mark threshold ranges corresponding to the first parameter are set according to actual conditions of a power battery system, for example, when a battery pack is a ternary polymer lithium battery, setting the first parameter of a ternary battery core in the battery pack to include the real-time voltage, the real-time temperature, the real-time current and the standing time period, correspondingly, setting the balance mark threshold corresponding to the voltage of the ternary battery core to be 4.0-4.15V, setting the balance mark threshold corresponding to the temperature of the ternary battery core to be 10-35 ℃, setting the balance mark threshold corresponding to the current of the ternary battery core to be rated current +/-3A, setting the balance mark threshold corresponding to the standing time period of the battery pack to be 20min or more, judging the conditions of the target battery core, and performing step 104.2.
Step 104.2: when the real-time voltage, the real-time temperature, the real-time current and the standing time length of the target battery cell are all within the preset marking threshold value range, further judging whether the capacitance of the target battery cell is larger than the average capacitance and the target capacitance.
Specifically, when the real-time voltage, the real-time temperature, the real-time current and the standing time length of the target battery cell are all within the preset marking threshold value range, further judging whether the capacitance of the target battery cell is larger than the average capacitance and the target capacitance, and when one of the real-time voltage, the real-time temperature, the real-time current and the standing time length of the target battery cell is not within the preset marking threshold value range, returning to the step 101 to continuously acquire the real-time parameter of the battery cell.
And (3) carrying out the condition limitation of the equalization mark threshold range corresponding to the set first parameter on the target battery cell, so that all battery cells can be prevented from being equalized blindly, and battery cells unsuitable for equalization can be prevented from being equalized, thereby causing the situation of error equalization.
In a specific implementation process, the real-time voltage, the real-time temperature, the real-time current and the standing time length of the target battery cell are all within the preset marking threshold range, which means that the threshold ranges corresponding to the parameters are simultaneously met, if one of the parameters of a certain target battery cell does not meet the threshold range, the target battery cell is not suitable for equalization, and further judgment is not performed, then the judgment of the preset marking threshold range is performed on the next target battery cell, or the step 101 is returned, the real-time parameters of the target battery cell are continuously acquired until the target battery cell meets the preset standard threshold range, and further judgment is performed.
Specifically, it is further determined whether the capacitance of the target cell is greater than the average capacitance and the target capacitance, and when the capacitance of the target cell is greater than the average capacitance and less than or equal to the target capacitance, or when the capacitance of the target cell is less than or equal to the average capacitance and greater than the target capacitance, the capacitance determination condition is not satisfied, and step 104.3 is entered only if the capacitance of the target cell is greater than the average capacitance and greater than the target capacitance.
Step 104.3: and if the capacitance of the target battery cell is larger than the average capacitance and larger than the target capacitance, determining the target battery cell as the battery cell to be balanced.
Specifically, when the capacitance of the target cell is greater than the average capacitance and greater than the target capacitance, determining that the target cell is a cell to be balanced, entering step 105, otherwise, returning to step 101 to continuously obtain the real-time parameters of the cell.
Whether the electric core to be balanced is determined by judging whether the electric core meets the electric capacity standard set according to the actual electric capacity of the target electric core or not according to the actual electric capacity of the target electric core, so as to ensure the real-time accuracy of the electric capacity, and the electric core to be balanced can be ensured to be effective under the condition that the actual electric capacity is smaller than the original electric capacity due to the reasons of battery loss and the like because the electric capacity setting standard is not practical.
In the implementation process, the target battery cell is determined to be the battery cell to be balanced, namely the target battery cell is marked, so that the target battery cell is the battery cell which really needs to be balanced, and the situation of error balance can be prevented. Because the number of the battery cells in the battery pack is large, each single battery cell is generally numbered, the marked target battery cell can be determined to be the battery cell to be balanced by determining the number of the target battery cell, and when the battery cell is balanced subsequently, the battery cell corresponding to the number is directly balanced.
Step 105: and obtaining the equalization time length of the battery cell to be equalized according to the capacitance of the battery cell to be equalized and the preset equalization current.
Specifically, reasonable equalization time length is set, so that the battery cell can be guaranteed to achieve sufficient equalization electric quantity, and the situation that excessive equalization is easily caused by equalization of the battery cell all the time in the whole charging or discharging process can be prevented.
In the specific implementation process, the equalization electric quantity=equalization duration×equalization current, in this embodiment, according to the relationship, the equalization duration of the to-be-equalized battery cell=the capacitance of the to-be-equalized battery cell/preset equalization current is set, the equalization duration is an integrated index influenced by a hardware circuit and also influenced by a battery consistency requirement, and excessive equalization can be prevented by reasonable duration. And carrying out preset equalization current adjustment according to the strategy requirement of the power battery system and the performance of the power battery, wherein correspondingly, the equalization time length is set aiming at the capacitance of the battery cells to be equalized, and the respective equalization time lengths of the battery cells to be equalized in the whole battery pack are possibly inconsistent, so that the object of battery equalization and the equalization time length are more aimed.
Step 106: and balancing the battery cells to be balanced within the balancing duration of the battery cells to be balanced.
Specifically, in order to reduce consistency differences caused by different factory specifications and different battery lives of batteries, the battery pack needs to be balanced according to the to-be-balanced battery cells which are determined by meeting the condition limitations in the steps, and the battery pack is balanced according to the existing hardware in a power battery system, including a passive balancing circuit for balancing execution, and the to-be-balanced battery cells are subjected to balanced discharge along with the decrease of the balancing duration, and after the balancing duration is over, the balancing is terminated, so that sufficient balanced electric quantity is ensured, the service capacity of the battery is improved, and the service life of the battery is prolonged.
In the battery equalization control method provided by the embodiment, a user can keep an original passive equalization design circuit according to the battery consistency difference, and perform passive equalization control under the conditions of equalization current and hardware, and the embodiment realizes the technical effects of improving the electric property difference of single electric cores in a battery pack, improving the service capacity of the battery and prolonging the service life of the battery, specifically, firstly screening the electric cores with real-time parameters within the preset equalization mark threshold range, and then determining the electric cores to be equalized according to the average electric capacity and the target electric capacity, so that the effectiveness of the electric cores to be equalized can be ensured, and the error equalization can be effectively avoided; and the target capacitance is set according to the minimum capacitance, and only the battery cells which are larger than the average capacitance and larger than the target capacitance are balanced, so that excessive balancing is effectively avoided, and the energy utilization rate of the battery is improved; and finally, in the equalization time length of the battery cells to be equalized, the determined battery cells to be equalized are subjected to equalization discharge, so that the consistency difference caused by different factory specifications and different battery lives of the batteries is reduced while sufficient equalization electric quantity is ensured, the short-term energy maximization of the batteries is achieved, the situations of excessive equalization and error equalization are prevented, the capacity maximization of the battery cells with the minimum electric capacity in the battery pack can be effectively ensured in the whole life cycle of the batteries, and the capacity maximization of the battery pack is realized.
Example two
Based on the same inventive concept, referring to another flow chart of a battery equalization control method shown in fig. 2, the present embodiment further provides, on the basis of the first embodiment, a battery equalization control method, which specifically includes the following steps:
Step 201: and acquiring a first parameter and a capacitance of each cell in the battery pack.
Specifically, the battery pack is electrified, and a first parameter and a capacitance of each electric core in the battery pack are obtained; in one embodiment, the first parameter includes a real-time voltage, a real-time temperature, a real-time current, and a rest period of the battery cell;
step 202: and obtaining the minimum capacitance and the average capacitance of the battery pack according to the capacitance of each cell.
Step 203: and obtaining the target capacitance of the battery pack according to the minimum capacitance.
Step 204: determining a target cell meeting preset conditions as a cell to be balanced, wherein the preset conditions comprise: the first parameter of the target battery cell is within a preset balance mark threshold range, and the capacitance of the target battery cell is larger than the average capacitance and the target capacitance.
In one embodiment, the determination of the target cell satisfying the preset condition as the cell to be equalized may be achieved by the following steps 104.1 to 104.3:
Step 204.1: and judging whether the real-time voltage, the real-time temperature, the real-time current and the standing time length of the target battery cell are all within the corresponding preset balance mark threshold range.
Step 204.2: when the real-time voltage, the real-time temperature, the real-time current and the standing time length of the target battery cell are all within the preset marking threshold value range, further judging whether the capacitance of the target battery cell is larger than the average capacitance and the target capacitance.
Specifically, when the real-time voltage, the real-time temperature, the real-time current and the standing time length of the target battery cell are all within the preset marking threshold value range, further judging whether the capacitance of the target battery cell is larger than the average capacitance and the target capacitance, and when one of the real-time voltage, the real-time temperature, the real-time current and the standing time length of the target battery cell is not within the preset marking threshold value range, returning to the step 201 to continuously acquire the real-time parameter of the battery cell;
Step 204.3: and if the capacitance of the target battery cell is larger than the average capacitance and larger than the target capacitance, determining the target battery cell as the battery cell to be balanced.
Specifically, when the capacitance of the target battery cell is greater than the average capacitance and greater than the target capacitance, determining that the target battery cell is a battery cell to be balanced, entering step 205, otherwise, returning to step 201 to continuously obtain the real-time parameters of the battery cell;
step 205: and obtaining the equalization time length of the battery cell to be equalized according to the capacitance of the battery cell to be equalized and the preset equalization current.
For more details in the embodiments based on steps 201 to 205, reference may be made to the descriptions in the embodiment based on steps 101 to 105 in the first embodiment, and for brevity of the description, details are not repeated here.
Step 206: storing the number corresponding to the cell to be balanced and the balancing duration thereof;
specifically, the number corresponding to the cell to be balanced and the balancing duration thereof are stored in a memory or a storage unit and other storage devices based on the power battery system, when the cell to be balanced is determined in step 204, the number corresponding to the cell to be balanced and the balancing duration of the cell to be balanced calculated in step 205 are stored together until balancing is finished, and the cell to be balanced is cleared when the cell to be balanced exits, firstly, information is called when balancing is conveniently executed, secondly, when a system fault or balancing interrupt and other conditions occur after the balancing is convenient, balancing is continued after the problem is solved.
After storing the corresponding number of the battery cell to be balanced and the balancing duration thereof, the following steps 207 to 208 can be sequentially executed, thereby realizing the passive balancing control of the battery in one complete charging process with interruption; the steps 207 to 208 may be branches of steps executed independently, so as to realize passive equalization control of the battery with multiple independent battery cells, and when the equalization marks are performed in the steps 201 to 206, the steps 207 to 208 execute equalization on the stored battery cells to be equalized.
Step 207: and balancing the battery cells to be balanced within the balancing duration of the battery cells to be balanced.
In one embodiment, the equalization of the cells to be equalized in the equalization duration of the cells to be equalized may be achieved by the following steps 207.1-207.3:
Step 207.1: and in the process of carrying out balanced discharge on the battery cells to be balanced, if the battery pack is powered down, interrupting the balancing and storing the number corresponding to the battery cells to be balanced and the residual balancing duration.
Specifically, passive equalization is performed in the charging process of the power battery, when the automobile is not charged, the user pulls out the battery pack from the charging equipment, the battery pack is powered down, at this time, the equalization is not completed, the equalization is interrupted, the number corresponding to the battery cell to be equalized and the remaining equalization time length of the equalization are stored, and the remaining equalization time length is stored, so that the storage time length of the battery cell to be equalized stored in the storage equipment in step 206 is replaced.
Step 207.2: and judging whether the second parameter of the battery cell to be balanced is in a preset equalization execution threshold range according to the stored number corresponding to the battery cell to be balanced.
Wherein the second parameter is different from the first parameter, and specific parameters of the second parameter may be less than the first parameter, for example, in an implementation manner, the first parameter of the embodiment may be an operating parameter including a real-time voltage, a real-time temperature, a real-time current, and the like, and include a cooling duration or a standing duration of the battery pack, and the corresponding second parameter may include an operating parameter including a real-time voltage, a real-time temperature, and the like; in another implementation manner, the first parameter of this embodiment may include working parameters such as a real-time voltage, a real-time temperature, a real-time current, and the like, and include a cooling duration or a standing duration of the battery pack, and may further include detection results such as detecting whether the battery pack has a fault, whether the equalization circuit has a fault, and the like, and the corresponding second parameter may include working parameters such as a real-time voltage, a real-time temperature, and the like, and include detection results such as detecting whether the battery pack has a fault, whether the equalization circuit has a fault, and the like.
Specifically, in one embodiment, the preset equalization execution threshold range corresponding to the second parameter is set according to the actual situation of the power battery system, so that some parameter determination is less, for example, it is no longer necessary to determine whether the standing duration meets the requirement; meanwhile, the preset equalization execution threshold range of the real-time second parameter is also wider than the preset equalization mark threshold range, for example, in the battery pack in the specific implementation details of step 104.1 of the embodiment, the equalization mark threshold corresponding to the temperature of the ternary battery cell is set to be 10-35 ℃, and the equalization execution threshold corresponding to the temperature of the ternary battery cell can be set to be 0-50 ℃ corresponding to the equalization mark threshold.
In an embodiment, specifically, the determining, according to the stored number corresponding to the cell to be balanced, whether the second parameter of the cell to be balanced is within the preset equalization execution threshold range may include the following steps 207.2.1-207.2.2:
step 207.2.1: when the battery pack is electrified again, acquiring the real-time voltage and the real-time temperature of the battery cell to be balanced according to the stored serial numbers of the battery cells to be balanced;
Specifically, in one embodiment, the second parameter includes two parameters, namely a real-time voltage and a real-time temperature, when the user connects the battery pack with the charging device again and starts charging, the battery pack is electrified again, firstly, the number corresponding to the stored battery cell to be balanced in the storage device is called, and the real-time voltage and the real-time temperature of the corresponding battery cell to be balanced are obtained according to the stored number of the battery cell to be balanced;
When the battery pack is electrified again, equalization can be continued according to stored information, and the battery cells to be equalized do not need to be redetermined, so that the integrity of the equalization at the present time can be ensured, the step of redetermining the battery cells to be equalized can be reduced, and the equalization efficiency of the battery is improved;
Step 207.2.2: judging whether the real-time voltage and the real-time temperature of the battery cell to be balanced are both in a corresponding preset balancing execution threshold range;
In the specific implementation process, after the second parameter is determined to include the real-time voltage and the real-time temperature, and after the corresponding equalization execution threshold ranges are set according to the parameters, judgment is performed, wherein the mode of setting the second parameter content and the equalization execution threshold ranges corresponding to the second parameter can be set by a user or can be set by a manufacturer before the automobile leaves the factory.
Step 207.3: and if the second parameter of the stored battery cell to be balanced is within a preset balanced execution threshold range, balancing the battery cell to be balanced according to the residual balanced time length of the stored battery cell to be balanced.
Specifically, when the real-time voltage and the real-time temperature of the stored battery cell to be balanced are both within the corresponding preset balance execution threshold ranges, balancing the battery cell to be balanced according to the remaining balancing duration of the stored battery cell to be balanced, and when one of the real-time voltage and the real-time temperature of the stored battery cell to be balanced is not within the preset balance execution threshold ranges, returning to the step 201 to acquire the real-time parameters of the battery cell again.
Step 208: and when the balance duration time is finished, clearing the stored number corresponding to the battery cell to be balanced, and ending the balance.
Specifically, according to the existing hardware in the power battery system, the equalization is performed by a passive equalization circuit which performs equalization, the battery core to be equalized is subjected to equalization discharge along with the decrease of the equalization duration, and after the equalization duration is over, the equalization is terminated, so that sufficient equalization electric quantity can be ensured, the service capacity of the battery is improved, and the service life of the battery is prolonged.
In the battery equalization control method provided by the embodiment, the steps of storing the number and the equalization time length of the battery cell to be equalized are added, and when the battery pack is powered down, the number and the remaining equalization time length of the battery cell to be equalized are stored again, and when the battery pack is powered up again, equalization can be continued according to stored information, and the battery cell to be equalized does not need to be determined again; meanwhile, after the battery pack is electrified again, the stored second parameters of the battery cells to be balanced are obtained, and whether the second parameters are in the preset equalization execution threshold range or not is judged, so that the normal discharge of the battery is not influenced by the equalization, and the working efficiency of the power battery system is improved.
Example III
Based on the same inventive concept, referring to a functional block diagram of a battery equalization control system shown in fig. 3, this embodiment provides a battery equalization control system, where the system is connected with a power battery system, and passively equalizes a charging process of a battery pack in the power battery system, and the system includes:
the parameter acquisition module is used for acquiring a first parameter of each electric core in the battery pack;
The electric capacity module is connected with the parameter acquisition module and is used for obtaining the electric capacity of each electric core according to the first parameter of each electric core and obtaining the minimum electric capacity and the average electric capacity of the battery pack according to the electric capacity of each electric core;
The target capacitance module is connected with the capacitance module and is used for obtaining the target capacitance of the battery pack according to the minimum capacitance;
The balancing marking module is connected with the parameter acquisition module and the target capacitance module and is used for determining a target cell meeting preset conditions as a cell to be balanced and outputting information corresponding to the cell to be balanced, wherein the preset conditions comprise: the first parameter of the target battery cell is in a preset balance mark threshold range, and the capacitance of the target battery cell is larger than the average capacitance and the target capacitance;
the equalization duration module is connected with the equalization marking module and is used for obtaining the equalization duration of the battery cell to be equalized according to the capacitance of the battery cell to be equalized and the preset equalization current;
The equalization execution module is connected with the equalization duration module and is used for equalizing the battery cells to be equalized in the equalization duration of the battery cells to be equalized; the balancing method is also used for judging whether the second parameter of the battery cell to be balanced is in a preset balancing execution threshold range according to the number corresponding to the stored battery cell to be balanced, so that the battery cell to be balanced is balanced according to the remaining balancing duration of the stored battery cell to be balanced;
The storage module is connected with the equalization duration module and the equalization execution module and is used for storing the number corresponding to the cell to be equalized and the equalization duration thereof and storing the residual equalization duration of the cell to be equalized when the equalization is interrupted.
According to the battery equalization control system, the technical effects of improving the electrical property difference of single battery cells in the battery pack, improving the service capacity of the battery and prolonging the service life of the battery are achieved, the situations of excessive equalization and error equalization are prevented, the fact that the capacity of a battery cell monomer with the minimum capacitance in the battery pack is maximized within the whole service life period of the battery is effectively guaranteed, and therefore the capacity maximization of the battery pack is achieved.
Example IV
Based on the same inventive concept, the present embodiment provides a computer readable storage medium, such as a flash memory, a hard disk, a multimedia card, a card memory (e.g., SD or DX memory, etc.), a Random Access Memory (RAM), a Static Random Access Memory (SRAM), a Read Only Memory (ROM), an Electrically Erasable Programmable Read Only Memory (EEPROM), a Programmable Read Only Memory (PROM), a magnetic memory, a magnetic disk, an optical disk, a server, an App application store, etc., on which a computer program is stored, which when executed by a processor, can implement the following method steps:
step 301: acquiring a first parameter and a capacitance of each electric core in the battery pack; the first parameters comprise real-time voltage, real-time temperature, real-time current and standing time length of the battery cell;
Step 302: obtaining the minimum capacitance and the average capacitance of the battery pack according to the capacitance of each battery cell;
Step 303: obtaining a target capacitance of the battery pack according to the minimum capacitance;
Step 304: determining a target cell meeting preset conditions as a cell to be balanced, wherein the preset conditions comprise: the first parameter of the target battery cell is in a preset balance mark threshold range, and the capacitance of the target battery cell is larger than the average capacitance and the target capacitance;
step 305: obtaining the equalization time length of the battery cell to be equalized according to the capacitance of the battery cell to be equalized and preset equalization current;
step 306: and balancing the battery cells to be balanced within the balancing duration of the battery cells to be balanced.
The specific embodiment process of the above method steps can be referred to as embodiment one, and the description of this embodiment is not repeated here.
Example five
Based on the same inventive concept, the present embodiment provides an electronic device, which may be a mobile phone, a computer, or a tablet computer, and includes a memory and a processor, where the memory stores a computer program, and the computer program when executed by the processor implements the battery balancing control method as described in the first embodiment. It is to be appreciated that the electronic device can also include multimedia components, input/output (I/O) interfaces, and communication components.
Wherein the processor is configured to perform all or part of the steps in the battery equalization control method as described in the above-described embodiment one. The memory is used to store various types of data, which may include, for example, instructions for any application or method in the electronic device, as well as application-related data.
The processor may be an Application SPECIFIC INTEGRATED Circuit (ASIC), a digital signal processor (DIGITAL SIGNAL processor, DSP), a digital signal processing device (DIGITAL SIGNAL Processing Device, DSPD), a programmable logic device (Programmable Logic Device, PLD), a field programmable gate array (Field Programmable GATE ARRAY, FPGA), a controller, a microcontroller, a microprocessor, or other electronic component for performing all or part of the steps in the battery equalization control method as described in the above embodiment one.
The memory may be implemented by any type of volatile or non-volatile memory device or combination thereof, such as static random access memory (Static Random Access Memory, SRAM for short), electrically erasable programmable read-only memory (ELECTRICALLY ERASABLE PROGRAMMABLE READ-only memory, EEPROM for short), erasable programmable read-only memory (Erasable Programmable Read-only memory, EPROM for short), programmable read-only memory (Programmable Read-only memory, PROM for short), read-only memory (ROM for short), magnetic memory, flash memory, magnetic disk or optical disk.
The multimedia component may include a screen, which may be a touch screen, and an audio component for outputting and/or inputting audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may be further stored in a memory or transmitted through a communication component. The audio assembly further comprises at least one speaker for outputting audio signals.
The I/O interface provides an interface between the processor and other interface modules, which may be a keyboard, mouse, buttons, etc. These buttons may be virtual buttons or physical buttons.
The communication component is used for conducting wired or wireless communication between the electronic device and other devices. Wireless Communication, such as Wi-Fi, bluetooth, near field Communication (NFC for short), 2G, 3G or 4G, or a combination of one or more thereof, so that the corresponding Communication component may comprise: wi-Fi module, bluetooth module, NFC module.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present invention or other related technical fields are included in the scope of the invention.
Claims (8)
1. A battery equalization control method, characterized in that the method comprises the steps of:
acquiring a first parameter and a capacitance of each electric core in the battery pack, wherein the first parameter comprises real-time voltage, real-time temperature, real-time current and standing time;
obtaining the minimum capacitance and the average capacitance of the battery pack according to the capacitance of each battery cell;
obtaining a target capacitance of the battery pack according to the minimum capacitance;
judging whether the real-time voltage, the real-time temperature, the real-time current and the standing time length of the target battery cell are all within the corresponding preset balance mark threshold value range or not;
When the real-time voltage, the real-time temperature, the real-time current and the standing time length of the target battery cell are all within the preset marking threshold value range, further judging whether the capacitance of the target battery cell is larger than the average capacitance and the target capacitance;
If the capacitance of the target battery cell is larger than the average capacitance and larger than the target capacitance, determining the target battery cell as a battery cell to be balanced;
Obtaining the equalization time length of the battery cell to be equalized according to the capacitance of the battery cell to be equalized and preset equalization current;
equalizing the battery cells to be equalized within the equalization time length of the battery cells to be equalized;
wherein, balance the battery cell to be balanced, include:
Acquiring a second parameter of the battery cell to be balanced, wherein the second parameter comprises real-time voltage and real-time temperature;
Judging whether the real-time voltage and the real-time temperature of the battery cell to be balanced are both in a corresponding preset balancing execution threshold range;
And when the real-time voltage and the real-time temperature of the battery cell to be balanced are both in the corresponding preset balanced execution threshold ranges, balancing the battery cell to be balanced according to the residual balanced time length of the battery cell to be balanced.
2. The battery equalization control method of claim 1, wherein after the step of obtaining the equalization duration of the cells to be equalized according to the capacitance of the cells to be equalized and a preset equalization current, the method further comprises:
And storing the number corresponding to the cell to be balanced and the balancing duration thereof.
3. The battery equalization control method according to claim 1, wherein the step of equalizing the battery cells to be equalized in the equalization period of the battery cells to be equalized specifically includes:
and in the process of carrying out balanced discharge on the battery cells to be balanced, if the battery pack is powered down, interrupting the balancing and storing the number corresponding to the battery cells to be balanced and the residual balancing duration.
4. The battery equalization control method as set forth in claim 2 or 3, wherein the step of equalizing the cells to be equalized in the equalization period of the cells to be equalized specifically includes:
in the balancing time length of the battery cells to be balanced, balancing the battery cells to be balanced according to the stored numbers corresponding to the battery cells to be balanced;
The balancing the battery cell to be balanced according to the remaining balancing duration of the battery cell to be balanced comprises the following steps:
And balancing the battery cells to be balanced according to the stored residual balancing duration of the battery cells to be balanced.
5. The battery equalization control method of claim 4, wherein after the step of equalizing the cells to be equalized within an equalization period of the cells to be equalized, the method further comprises:
and when the balance duration time is finished, clearing the stored number corresponding to the battery cell to be balanced, and ending the balance.
6. A battery equalization control system, the system comprising:
The parameter acquisition module is used for acquiring first parameters of each electric core in the battery pack, wherein the first parameters comprise real-time voltage, real-time temperature, real-time current and standing time;
The electric capacity module is connected with the parameter acquisition module and is used for obtaining the electric capacity of each electric core according to the first parameter of each electric core and obtaining the minimum electric capacity and the average electric capacity of the battery pack according to the electric capacity of each electric core;
The target capacitance module is connected with the capacitance module and is used for obtaining the target capacitance of the battery pack according to the minimum capacitance;
The balancing marking module is connected with the parameter acquisition module and the target capacitance module and is used for judging whether the real-time voltage, the real-time temperature, the real-time current and the standing time length of the target battery cell are all in the corresponding preset balancing marking threshold value range, when the real-time voltage, the real-time temperature, the real-time current and the standing time length of the target battery cell are all in the preset marking threshold value range, further judging whether the capacitance of the target battery cell is larger than the average capacitance and the target capacitance, and if the capacitance of the target battery cell is larger than the average capacitance and the target capacitance, determining that the target battery cell is a battery cell to be balanced;
the equalization duration module is connected with the equalization marking module and is used for obtaining the equalization duration of the battery cell to be equalized according to the capacitance of the battery cell to be equalized and the preset equalization current;
The equalization execution module is connected with the equalization duration module and is used for equalizing the battery cells to be equalized in the equalization duration of the battery cells to be equalized; wherein, balance the battery cell to be balanced, include: and acquiring a second parameter of the battery cell to be balanced, wherein the second parameter comprises real-time voltage and real-time temperature, judging whether the real-time voltage and the real-time temperature of the battery cell to be balanced are both in a corresponding preset balanced execution threshold range, and balancing the battery cell to be balanced according to the residual balanced time length of the battery cell to be balanced when the real-time voltage and the real-time temperature of the battery cell to be balanced are both in the corresponding preset balanced execution threshold range.
7. A storage medium having stored thereon a computer program executable by one or more processors to implement the battery equalization control method of any of claims 1 to 5.
8. An electronic device comprising a memory and a processor, wherein the memory has stored thereon a computer program which, when executed by the processor, implements the battery equalization control method of any of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011425016.9A CN112541260B (en) | 2020-12-08 | 2020-12-08 | Battery equalization control method, system, storage medium and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011425016.9A CN112541260B (en) | 2020-12-08 | 2020-12-08 | Battery equalization control method, system, storage medium and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112541260A CN112541260A (en) | 2021-03-23 |
| CN112541260B true CN112541260B (en) | 2024-04-19 |
Family
ID=75019569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011425016.9A Active CN112541260B (en) | 2020-12-08 | 2020-12-08 | Battery equalization control method, system, storage medium and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112541260B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115332649B (en) * | 2022-07-05 | 2023-06-09 | 厦门宇电自动化科技有限公司 | Battery temperature control management method, device, equipment and readable storage medium |
| CN117634149A (en) * | 2023-11-03 | 2024-03-01 | 中国南方电网有限责任公司超高压输电公司大理局 | Equalization circuit optimization method, equalization circuit optimization device, equalization circuit optimization computer device, equalization circuit optimization storage medium and equalization circuit optimization product |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730936A (en) * | 2014-01-03 | 2014-04-16 | 桂林电子科技大学 | Electric automobile power battery equalization management system and method |
| CN104600387A (en) * | 2015-02-05 | 2015-05-06 | 青海时代新能源科技有限公司 | Active equalization method and active equalization system of lithium iron phosphate battery pack |
| CN105548895A (en) * | 2015-12-17 | 2016-05-04 | 北京长城华冠汽车科技股份有限公司 | Battery pack performance test method and device |
| CN106785118A (en) * | 2016-12-26 | 2017-05-31 | 常州普莱德新能源电池科技有限公司 | A kind of electrokinetic cell system balance control method and system |
| WO2018129884A1 (en) * | 2017-01-13 | 2018-07-19 | 宁德时代新能源科技股份有限公司 | Battery equalisation and sampling method |
| CN109017429A (en) * | 2018-10-09 | 2018-12-18 | 天津易众腾动力技术有限公司 | A kind of passive equalization algorithm of full working scope of power battery pack quantization |
| CN110015181A (en) * | 2017-08-24 | 2019-07-16 | 宝沃汽车（中国）有限公司 | Battery equalization method, device and vehicle |
| CN110265737A (en) * | 2019-06-28 | 2019-09-20 | 蜂巢能源科技有限公司 | Assemble method, the apparatus and system of electrical core of power battery |
| CN110380466A (en) * | 2019-06-25 | 2019-10-25 | 南京四象新能源科技有限公司 | Battery management method and battery management system with passive equalization function |
| CN110967646A (en) * | 2019-05-24 | 2020-04-07 | 宁德时代新能源科技股份有限公司 | SOC correction method and apparatus, battery management system, and storage medium |
| CN111416397A (en) * | 2019-01-07 | 2020-07-14 | 广州汽车集团股份有限公司 | Battery equalization method and device, control equipment and computer readable storage medium |
| CN111490304A (en) * | 2020-05-18 | 2020-08-04 | 重庆金康动力新能源有限公司 | Battery equalization enabling method and device, storage medium and battery pack |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014115200A1 (en) * | 2013-01-24 | 2014-07-31 | 三菱電機株式会社 | Storage cell equalization device |
-
2020
- 2020-12-08 CN CN202011425016.9A patent/CN112541260B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730936A (en) * | 2014-01-03 | 2014-04-16 | 桂林电子科技大学 | Electric automobile power battery equalization management system and method |
| CN104600387A (en) * | 2015-02-05 | 2015-05-06 | 青海时代新能源科技有限公司 | Active equalization method and active equalization system of lithium iron phosphate battery pack |
| CN105548895A (en) * | 2015-12-17 | 2016-05-04 | 北京长城华冠汽车科技股份有限公司 | Battery pack performance test method and device |
| CN106785118A (en) * | 2016-12-26 | 2017-05-31 | 常州普莱德新能源电池科技有限公司 | A kind of electrokinetic cell system balance control method and system |
| WO2018129884A1 (en) * | 2017-01-13 | 2018-07-19 | 宁德时代新能源科技股份有限公司 | Battery equalisation and sampling method |
| CN110015181A (en) * | 2017-08-24 | 2019-07-16 | 宝沃汽车（中国）有限公司 | Battery equalization method, device and vehicle |
| CN109017429A (en) * | 2018-10-09 | 2018-12-18 | 天津易众腾动力技术有限公司 | A kind of passive equalization algorithm of full working scope of power battery pack quantization |
| CN111416397A (en) * | 2019-01-07 | 2020-07-14 | 广州汽车集团股份有限公司 | Battery equalization method and device, control equipment and computer readable storage medium |
| CN110967646A (en) * | 2019-05-24 | 2020-04-07 | 宁德时代新能源科技股份有限公司 | SOC correction method and apparatus, battery management system, and storage medium |
| CN110380466A (en) * | 2019-06-25 | 2019-10-25 | 南京四象新能源科技有限公司 | Battery management method and battery management system with passive equalization function |
| CN110265737A (en) * | 2019-06-28 | 2019-09-20 | 蜂巢能源科技有限公司 | Assemble method, the apparatus and system of electrical core of power battery |
| CN111490304A (en) * | 2020-05-18 | 2020-08-04 | 重庆金康动力新能源有限公司 | Battery equalization enabling method and device, storage medium and battery pack |
Non-Patent Citations (1)
| Title |
|---|
| 基于磷酸铁锂单体电池荷电状态的均衡算法研究;张树梅;中国博士学位论文全文数据库工程科技Ⅱ辑;20170215(第02期);C042-283 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112541260A (en) | 2021-03-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103221835B (en) | Device for controlling assembled battery | |
| WO2017016385A1 (en) | Estimation method and apparatus for state-of-charge value of battery | |
| CN106451592B (en) | The control method of battery charging and discharging, the control equipment of battery charging and discharging and electric vehicle | |
| CN110011374A (en) | A kind of control method, system and the terminal device of battery charging and discharging electric current | |
| CN105917518B (en) | The method that charged state for battery pack balances | |
| CN112541260B (en) | Battery equalization control method, system, storage medium and electronic equipment | |
| JP7173127B2 (en) | BATTERY MONITORING METHOD, BATTERY MONITORING DEVICE, AND BATTERY MONITORING SYSTEM | |
| KR102572652B1 (en) | Method for estimating state of charge of battery | |
| CN113661401B (en) | Apparatus and method for diagnosing state of battery module in battery pack | |
| CN112379293B (en) | Charge state correction method and device | |
| WO2021077273A1 (en) | Charging method, electronic device and storage medium | |
| CN113406523A (en) | Energy storage battery state evaluation method and device, electronic equipment and storage system | |
| CN112731185A (en) | Group matching method, group matching device and group matching system of lithium ion batteries | |
| CN114552039A (en) | Control method for battery constant-charge self-maintenance and constant-charge self-maintenance battery | |
| CN110901472A (en) | Battery management system balancing capability matching method and device and computer equipment | |
| US20220326308A1 (en) | State-of-charge cut-off control method, apparatus and system, and storage medium | |
| KR20150033503A (en) | Battery Management System united with I/O module | |
| CN108983100B (en) | Method and device for processing residual electric quantity of battery | |
| CN115001094A (en) | Battery overcharge-prevention charging method, device, equipment and storage medium | |
| JP7169917B2 (en) | SECONDARY BATTERY CONTROL DEVICE AND SECONDARY BATTERY CONTROL METHOD | |
| KR20220072578A (en) | Apparatus and method for managing battery | |
| WO2021077274A1 (en) | Charging method, electronic device, and storage medium | |
| CN114982039A (en) | Battery module balancing method and device, battery module and power management controller | |
| JPWO2020250342A1 (en) | Charge / discharge control device and charge / discharge control method | |
| CN117293979B (en) | Battery equalization control method, storage medium and electronic device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |