CN111490304B - Battery equalization enabling method and device, storage medium and battery pack - Google Patents

Battery equalization enabling method and device, storage medium and battery pack Download PDF

Info

Publication number
CN111490304B
CN111490304B CN202010418523.3A CN202010418523A CN111490304B CN 111490304 B CN111490304 B CN 111490304B CN 202010418523 A CN202010418523 A CN 202010418523A CN 111490304 B CN111490304 B CN 111490304B
Authority
CN
China
Prior art keywords
battery
capacity
equalization
single battery
judging whether
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
Application number
CN202010418523.3A
Other languages
Chinese (zh)
Other versions
CN111490304A (en
Inventor
王秋生
丁天喜
孙�石
刘冬群
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Jinkang Power New Energy Co Ltd
Original Assignee
Chongqing Jinkang Power New Energy Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Chongqing Jinkang Power New Energy Co Ltd filed Critical Chongqing Jinkang Power New Energy Co Ltd
Priority to CN202010418523.3A priority Critical patent/CN111490304B/en
Publication of CN111490304A publication Critical patent/CN111490304A/en
Application granted granted Critical
Publication of CN111490304B publication Critical patent/CN111490304B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/22—Balancing the charge of battery modules
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Manufacturing & Machinery (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The embodiment of the invention provides a battery equalization enabling method and device, a storage medium and a battery pack. Judging whether a balancing instruction is received or not; if the balancing instruction is judged not to be received, judging whether the cell type of the single battery comprises a lithium iron phosphate cell; if the battery cell type is judged to comprise the lithium iron phosphate battery cell, judging whether the measured change value of the state of charge of the battery cell is smaller than a specified threshold value; if the change value of the state of charge is smaller than the specified threshold value, judging whether the obtained residual equilibrium capacity of the single battery is larger than the set calibration capacity; and if the residual equilibrium capacity is judged to be larger than the calibration capacity, carrying out equilibrium enabling on the single battery. In the embodiment of the invention, when the change value of the state of charge of the single battery of the lithium iron phosphate battery core is smaller than the specified threshold value and the residual equilibrium capacity is larger than the calibrated capacity, the single battery is enabled in a balanced manner, the starting frequency of the battery in the balanced manner is improved, and the balancing effect of the battery is improved.

Description

Battery equalization enabling method and device, storage medium and battery pack
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of batteries, in particular to a battery equalization enabling method, a device, a storage medium and a battery pack.
[ background of the invention ]
The battery is used as an auxiliary or main power source of the new energy automobile, and the performance of the battery directly influences the service performance of the whole new energy automobile. The battery is formed by connecting different numbers of battery monomers in series, and the battery monomers are influenced by factors such as environmental temperature, humidity and the like in the manufacturing process, so that certain differences exist in each battery monomer in the same battery when leaving a factory, for example, performance parameters such as capacity, voltage, charge-discharge multiplying power and the like of the battery monomers exist, the differences can further increase along with the cyclic charge-discharge of the battery in the whole use process of the new energy automobile, and the influences of factors such as different working temperature environments of each battery monomer in the battery are further increased, so that the imbalance of each battery monomer in the same battery is caused.
In the related art, the equalization time is calculated in real time through the measured equalization current to achieve the equalization effect of the single battery, but the equalization current in the related art is constant, the equalization time is calculated by using the constant equalization current, the phenomenon of over-equalization is easy to occur, and the equalization effect of the battery is reduced.
[ summary of the invention ]
In view of the above, embodiments of the present invention provide a method and an apparatus for enabling battery equalization, a storage medium, and a battery pack, so as to improve an equalization effect of a battery.
In one aspect, an embodiment of the present invention provides a battery equalization enabling method, including:
judging whether a balancing instruction is received or not;
if the balancing instruction is judged not to be received, judging whether the cell type of the single battery comprises a lithium iron phosphate cell;
if the battery cell type is judged to comprise the lithium iron phosphate battery cell, judging whether the measured change value of the state of charge of the battery cell is smaller than a specified threshold value;
if the change value of the state of charge is smaller than a specified threshold value, judging whether the obtained residual equilibrium capacity of the single battery is larger than a set calibration capacity;
and if the residual equilibrium capacity is judged to be larger than the calibration capacity, carrying out equilibrium enabling on the single battery.
Optionally, the method further comprises:
if the battery cell type does not include the lithium iron phosphate battery cell, measuring a first current voltage of the battery cell;
judging whether the difference value of the first current voltage and the acquired first lowest voltage is greater than a set calibration voltage difference or not;
and if the difference value between the first current voltage and the first lowest voltage is larger than the calibration voltage difference, carrying out balance enabling on the single battery.
Optionally, the method further comprises:
and if the change value of the state of charge is judged to be larger than or equal to the specified threshold value, continuing to execute the step of measuring the first current voltage of the battery cell.
Optionally, the method further comprises:
if the balancing instruction is judged to be received, judging whether a balancing enabling channel of the single battery is opened or not;
if the balance enabling channel of the single battery is judged to be opened, performing balance enabling on the single battery;
and if the balancing enabling channel of the single battery is judged not to be opened, balancing forbidding the single battery.
Optionally, before the determining whether the equalization instruction is received, the method includes:
judging whether the standing time of the battery monomer is greater than or equal to a time threshold value;
if the standing time is judged to be greater than or equal to the time threshold, measuring a second current voltage of the single battery;
inquiring a capacity index corresponding to the second current voltage and an obtained lowest capacity index corresponding to the second lowest voltage according to an open circuit voltage table;
measuring a change value of the state of charge of the battery cell;
and calculating the residual equilibrium capacity according to the lowest capacity index, the set attenuation index of the single battery and the set rated capacity of the single battery.
Optionally, the method further comprises:
and if the standing time is judged to be smaller than the time threshold, acquiring the stored residual equilibrium capacity.
Optionally, the performing equalization enabling on the battery cells includes:
measuring the equalization time of the battery cells;
calculating an equalizing current according to the first current voltage and the resistance of the single battery;
calculating the balanced capacity according to the balanced current and the balanced time;
judging whether the obtained residual equilibrium capacity is larger than the equilibrium capacity;
and if the residual equalization capacity is judged to be larger than the equalized capacity, starting the cell equalization.
In another aspect, an embodiment of the present invention provides a battery equalization enabling apparatus, including:
the first judgment module is used for judging whether a balancing instruction is received or not;
the second judgment module is used for judging whether the cell type of the single battery comprises a lithium iron phosphate cell or not if the first judgment module judges that the balancing instruction is not received;
the third judging module is used for judging whether the measured change value of the charge state of the battery cell is smaller than a specified threshold value or not if the second judging module judges that the battery cell type comprises a lithium iron phosphate battery cell;
the fourth judging module is used for judging whether the obtained residual equilibrium capacity of the single battery is larger than the set calibration capacity or not if the third judging module judges that the change value of the state of charge is smaller than the specified threshold value;
and the balancing module is used for performing balancing enabling on the single battery if the fourth judging module judges that the residual balancing capacity is larger than the calibration capacity.
On the other hand, an embodiment of the present invention provides a storage medium, where the storage medium includes a stored program, and when the program runs, a device where the storage medium is located is controlled to execute the above battery balancing enabling method.
In another aspect, an embodiment of the present invention provides a battery pack, including a memory and a processor, where the memory is used to store information including program instructions, and the processor is used to control execution of the program instructions, where the program instructions are loaded by the processor and executed to implement the steps of the battery balancing enabling method.
In the technical scheme of the battery equalization enabling method provided by the embodiment of the invention, whether an equalization instruction is received or not is judged; if the equalization instruction is judged not to be received, whether the type of the single battery cell comprises the lithium iron phosphate battery cell is judged, when the change value of the charge state of the single battery cell of the lithium iron phosphate battery cell is smaller than a specified threshold value and the residual equalization capacity is larger than the calibrated capacity, the single battery cell is subjected to equalization enabling, the starting frequency of the equalization enabling of the battery is improved, and therefore the equalization effect of the battery is improved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments 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 labor.
Fig. 1 is a flowchart of a battery equalization enabling method according to an embodiment of the present invention;
fig. 2 is a flowchart of another battery equalization enabling method according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating the equalization enabling of the battery cells in fig. 2;
fig. 4 is a schematic structural diagram of a battery equalization enabling apparatus according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a battery pack according to an embodiment of the invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of associative relationship that describes an associated object, meaning that three types of relationships may exist, e.g., A and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
A battery pack for a vehicle is a key factor affecting the development of an electric vehicle, and the battery pack includes a plurality of batteries including a primary battery or a secondary battery, for example: lithium ion batteries or nickel metal hydride batteries. Each battery comprises a plurality of battery units which are connected in series or in parallel to form the battery. With the continuous development of battery technology, how to ensure the balance among a plurality of battery cells becomes one of the difficulties and hot spots in the research of battery technology.
In the related art, the balance time is calculated in real time through the balance current, so that the balance among the battery monomers is ensured. However, in the related art, the balancing effect of the single battery with the single battery cell type of the lithium iron phosphate battery cell is poor, because the voltage of the single battery with the single battery cell type of the lithium iron phosphate battery cell changes less with the charge state, and it is unreliable to judge whether to balance the single battery cell from the voltage difference of the single battery cell.
In the related art, the equalization current is constant, the equalization time is calculated through the constant equalization current, the phenomenon of over-equalization is easy to occur, the equalization current in the actual equalization process is changed, the equalization time calculated according to the constant equalization current is inaccurate, and whether the battery cell is equalized or not cannot be accurately judged.
In the related art, the obtained residual equalization time is not stored, so that the equalization starting frequency of the battery cell is low, and the equalization effect is poor.
In the related art, the unbalance phenomenon of the battery pack consisting of the single batteries is not considered, and the balance needs to be manually started when the battery pack is taken off line.
Therefore, in order to solve the technical problems in the related art, the present invention provides a method for enabling battery equalization, and fig. 1 is a flowchart of a method for enabling battery equalization according to an embodiment of the present invention, as shown in fig. 1, the method includes:
step 101, judging whether a balancing instruction is received.
And 102, if the balancing instruction is not received, judging whether the battery cell type of the battery cell comprises a lithium iron phosphate battery cell.
And 103, if the battery cell type is judged to comprise the lithium iron phosphate battery cell, judging whether the measured change value of the state of charge of the battery cell is smaller than a specified threshold value.
And 104, if the change value of the state of charge is smaller than the specified threshold value, judging whether the obtained residual equilibrium capacity of the single battery is larger than the set calibration capacity.
And 105, if the residual balance capacity is judged to be larger than the calibration capacity, carrying out balance enabling on the single battery.
In the technical scheme of the battery equalization enabling method provided by the embodiment of the invention, whether an equalization instruction is received or not is judged; if the equalization instruction is judged not to be received, whether the type of the single battery cell comprises the lithium iron phosphate battery cell is judged, when the change value of the charge state of the single battery cell of the lithium iron phosphate battery cell is smaller than a specified threshold value and the residual equalization capacity is larger than the calibrated capacity, the single battery cell is subjected to equalization enabling, the starting frequency of the equalization enabling of the battery is improved, and therefore the equalization effect of the battery is improved.
The present invention provides another battery equalization enabling method, and fig. 2 is a flowchart of another battery equalization enabling method according to an embodiment of the present invention, as shown in fig. 2, the method includes:
step 201, judging whether the standing time of the battery monomer is larger than or equal to a time threshold, if so, executing step 202; if not, go to step 206.
In the embodiment of the invention, each step is executed by the battery pack.
In the embodiment of the invention, the standing time comprises the standing time of the battery pack.
In the embodiment of the invention, the time threshold can be set according to actual needs. As an alternative, for example, the time threshold comprises 1 hour or 2 hours.
In the embodiment of the present invention, in order to balance the internal reaction and the temperature of the battery pack, the battery pack needs to be left for a period of time before step 201 is executed, so as to ensure the accuracy of the measured data.
Step 202, measuring a second current voltage of the battery cell.
In this step, a second current voltage of any one of the battery cells in the battery pack is measured.
And step 203, inquiring a capacity index corresponding to the second current voltage and the acquired lowest capacity index corresponding to the second lowest voltage according to the open-circuit voltmeter.
In the embodiment of the present invention, the second lowest voltage is a previously measured lowest voltage of the battery cell.
In this step, a corresponding relationship between the second current voltage and the capacity index is stored in an Open Circuit Voltage (OCV) table, and the capacity index corresponding to the second current voltage is found according to the corresponding relationship between the second current voltage and the capacity index in the OCV table.
The OCV table stores a correspondence between the second lowest voltage and the lowest capacity index, and the lowest capacity index corresponding to the second lowest voltage is found out according to the correspondence between the second lowest voltage and the lowest capacity index in the OCV table.
And step 204, measuring the change value of the state of charge of the battery cell.
Step 205, calculating the residual equilibrium capacity according to the lowest capacity index, the set attenuation index of the battery cell and the set rated capacity of the battery cell, and executing step 207.
In particular, by the formula Δ Capi＝(SOCi-SOCmin)*CapRated valueCalculating the residual equilibrium capacity by SOH, wherein, the delta CapiFor remaining equalized capacity, SOCiIs a capacity index, SOCminAt the lowest capacity index, CapRated valueTo set a rated valueCapacity, SOH is the decay exponent.
And step 206, acquiring the stored residual balance capacity.
In this step, as an alternative, the remaining equalization capacity is retrieved from the memory.
In the embodiment of the invention, the memory is connected with the battery pack. Specifically, the memory is connected with the battery pack through an interface arranged on the battery pack.
In the embodiment of the invention, the memory comprises a read-write memory. The Read/write Memory includes a charged Erasable Programmable Read Only Memory (EEPROM).
As an alternative, the remaining balance capacity is acquired from an EEPROM, the remaining balance capacity of the battery cell is stored in the EEPROM in advance, and the remaining balance capacity of the battery cell is acquired from the EEPROM.
Step 207, judging whether a balancing instruction is received, if so, executing step 213; if not, go to step 208.
In step 207, if the equalization command input by the user is received, it is determined that the equalization command is received. As an alternative, the user clicks the equalization software toggle button on the computer device through the computer device to input the equalization command.
In this step, if a balancing instruction is received, it indicates that the user performs manual balancing on the battery cells. The user manually starts the balancing function, so that the consistency of the battery monomer during the offline is improved; and if the balancing instruction is not received, the battery cell is automatically balanced.
Step 208, judging whether the cell type of the battery monomer comprises a lithium iron phosphate cell, if so, executing step 209; if not, go to step 211.
In the embodiment of the invention, the battery cell type comprises a ternary lithium battery cell or a lithium iron phosphate battery cell.
Step 209, judging whether the measured change value of the state of charge of the battery cell is smaller than a specified threshold value, if so, executing step 210; if not, go to step 212.
In the embodiment of the invention, the specified threshold value can be set according to actual needs.
In the embodiment of the invention, if the measured change value of the state of charge of the battery cell is judged to be smaller than the specified threshold value, the battery cell is in a stage that the second current voltage of the battery cell changes less along with the state of charge of the battery cell; if the measured change value of the state of charge of the battery cell is judged to be larger than or equal to the specified threshold value, the battery cell is in a stage that the second current voltage of the battery cell changes greatly along with the state of charge of the battery cell.
Step 210, judging whether the obtained residual equilibrium capacity of the battery monomer is larger than the set calibration capacity, if so, executing step 214; if not, go to step 215.
In the embodiment of the invention, the calibration capacity can be set according to actual needs.
In the embodiment of the invention, if the obtained residual equilibrium capacity of the single battery is judged to be larger than the set calibration capacity, the single battery is not completely balanced; and if the acquired residual balance capacity of the battery monomer is judged to be less than or equal to the set calibration capacity, the battery monomer is completely balanced.
Step 211, measuring a first current voltage of the battery cell.
Step 212, determining whether a difference value between the first current voltage and the obtained first lowest voltage is greater than a set calibration voltage difference, if so, executing step 214; if not, go to step 215.
In the embodiment of the invention, the first lowest voltage is the lowest voltage of the battery cells measured in advance.
In the embodiment of the invention, the calibration voltage difference can be set according to actual needs.
In the embodiment of the invention, if the difference value between the first current voltage and the first lowest voltage is judged to be larger than the set calibration voltage difference, the battery monomer is not completely balanced; if the difference value between the first current voltage and the first lowest voltage is judged to be smaller than or equal to the set calibration voltage difference, the battery cell is completely balanced.
Step 213, judging whether the equalization enabling channel of the single battery is opened, if so, executing step 214; if not, go to step 215.
In the embodiment of the invention, if the balance enabling channel of the single battery is judged to be opened, the user is indicated to open the balance enabling channel of the single battery; and if the balance enabling channel of the single battery is judged not to be opened, indicating that the balance enabling channel of the single battery is not opened by the user.
Step 214, performing equalization enabling on the battery cells, and continuing to execute step 216.
Fig. 3 is a flowchart of performing equalization enabling on the battery cells in fig. 2, and as shown in fig. 3, step 214 specifically includes:
step 2141, the equalization time of the battery cells is measured.
Step 2142, calculating an equilibrium current according to the first current voltage and the resistance of the battery cell.
In this step, according to the formula Ui/R＝IiCalculating an equilibrium current, wherein UiIs a first current voltage, R is the resistance of the battery cell, IiTo equalize the currents.
Step 2143, the equalized capacity is calculated according to the equalization current and the equalization time.
In this step, according to formula Ii*t＝CapiCalculating an equalized capacity, wherein IiFor equalizing the current, t is the equalization time, CapiIs the equalized capacity.
Step 2144, judging whether the obtained remaining equilibrium capacity is larger than the already equilibrium capacity, if yes, executing step 2145; if not, go to step 215.
In the embodiment of the invention, if the acquired residual equilibrium capacity is judged to be larger than the equilibrium capacity, the battery monomer is not completely balanced; and if the acquired residual balancing capacity is judged to be less than or equal to the balanced capacity, the battery cell is completely balanced.
Step 2145, cell balancing is started.
In this step, the cell balancing is started to perform balancing enabling on the cell.
And step 215, carrying out balance forbidding on the battery cells.
Specifically, the cell balancing is turned off to realize balancing prohibition on the cells.
And in the process of carrying out equalization enabling on the single battery, judging whether to start or forbid the equalization of the single battery according to the residual equalization capacity of the single battery and the equalized capacity of the single battery, and when the residual equalization capacity of the single battery is smaller than or equal to the equalized capacity, stopping the equalization of the single battery. Therefore, the battery single bodies are prevented from being over-balanced or under-balanced, and the balancing effect is effectively improved.
And step 216, taking the difference value between the residual balance capacity and the balanced capacity as a new residual balance capacity, and storing the new residual balance capacity.
In this step, as an alternative, a new remaining equalization capacity is stored in the memory, so that the battery cell is equalized again by the remaining equalization capacity in the memory.
In the technical scheme of the battery equalization enabling method provided by the embodiment of the invention, whether an equalization instruction is received or not is judged; if the balancing instruction is judged not to be received, judging whether the cell type of the single battery comprises a lithium iron phosphate cell; when the change value of the charge state of the battery monomer of the lithium iron phosphate battery cell is smaller than the specified threshold value and the residual equilibrium capacity is larger than the calibrated capacity, the battery monomer is enabled in a balanced manner, the starting frequency of the battery in the balanced manner is improved, and therefore the balancing effect of the battery is improved.
According to the technical scheme provided by the embodiment of the invention, the equalization current is calculated in real time according to the first current voltage of the single battery, the fixed equalization current is not adopted, and the equalized capacity is calculated according to the equalization current and the equalization time, so that the equalization reliability of the single battery is improved.
In the technical scheme provided by the embodiment of the invention, the difference value between the residual equalization capacity and the equalized capacity is stored in the memory, so that the battery monomer can obtain the difference value between the residual equalization capacity and the equalized capacity through the memory, and the equalization starting frequency is improved.
According to the technical scheme provided by the embodiment of the invention, when the battery pack is off-line, if the consistency of the electric core of the battery monomer is poor, the manual balance can be started by controlling the battery pack, so that the battery pack has better consistency when the battery pack is off-line.
In the technical scheme provided by the embodiment of the invention, if the residual balancing capacity of any single battery is not zero, the balancing instruction is received and the single battery is allowed to be started automatically, the single battery can enter a balancing state without considering whether the voltage difference is met, and the balancing efficiency of the single battery is improved.
The embodiment of the invention provides a battery equalization enabling device. Fig. 4 is a schematic structural diagram of a battery equalization enabling apparatus according to an embodiment of the present invention, as shown in fig. 4, the apparatus includes: the device comprises a first judgment module 11, a second judgment module 12, a third judgment module 13, a fourth judgment module 14 and an equalization module 15.
The first determining module 11 is configured to determine whether an equalization instruction is received.
The second judgment module 12 is configured to judge whether the cell type of the battery cell includes a lithium iron phosphate cell if the first judgment module 11 judges that the equalization instruction is not received.
The third determining module 13 is configured to determine whether the measured change value of the state of charge of the battery cell is smaller than a specified threshold value if the second determining module 12 determines that the battery cell type includes a lithium iron phosphate battery cell.
The fourth determining module 14 is configured to determine whether the obtained remaining balance capacity of the battery cell is greater than the set calibrated capacity if the third determining module 13 determines that the change value of the state of charge is smaller than the specified threshold.
The balancing module 15 is configured to perform balancing enabling on the battery cells if the fourth determining module 14 determines that the remaining balancing capacity is greater than the calibration capacity.
In the embodiment of the present invention, the apparatus further includes: a first measuring module 16 and a fifth judging module 17.
The first measurement module 16 is configured to measure a first current voltage of the battery cell if the second determination module 12 determines that the battery cell type does not include the lithium iron phosphate battery cell.
The fifth judging module 17 is configured to judge whether a difference between the first current voltage and the obtained first lowest voltage is greater than the set calibration voltage difference.
The balancing module 15 is further configured to perform balancing enabling on the battery cells if the fifth determining module 17 determines that the difference between the first current voltage and the first lowest voltage is greater than the calibration voltage difference.
In the embodiment of the present invention, if the third determining module 13 determines that the change value of the state of charge is greater than or equal to the specified threshold, the step of measuring the first current voltage of the battery cell by the first measuring module 16 is continuously executed.
In the embodiment of the present invention, the apparatus further includes: the module 18 is disabled.
The forbidding module 18 is configured to forbid balancing of the battery cells if the fourth determining module 14 determines that the remaining balancing capacity is less than or equal to the calibrated capacity.
In this embodiment of the present invention, the prohibiting module 18 is further configured to perform balancing prohibition on the single battery if the fifth determining module 17 determines that the difference between the first current voltage and the first lowest voltage is smaller than or equal to the calibrated voltage difference.
In the embodiment of the present invention, the apparatus further includes: and a sixth judging module 19.
The sixth determining module 19 is configured to determine whether the equalization enabling channel of the battery cell is opened if the first determining module 11 determines that the equalization instruction is received.
The equalizing module 15 is further configured to perform equalization enabling on the single battery if the sixth determining module 19 determines that the equalization enabling channel of the single battery is opened.
The forbidding module 18 is further configured to forbid balancing of the battery cell if the sixth determining module 19 determines that the balancing enabling channel of the battery cell is not opened.
In the embodiment of the present invention, the apparatus further includes: a seventh judging module 20, a second measuring module 21, a query module 22, a third measuring module 23 and a first calculating module 24.
The seventh judging module 20 is configured to judge whether the standing time of the battery cell is greater than or equal to a time threshold.
The second measuring module 21 is configured to measure a second current voltage of the battery cell if the seventh determining module 20 determines that the standing time is greater than or equal to the time threshold.
The query module 22 is configured to query a capacity index corresponding to the second current voltage and a lowest capacity index corresponding to the obtained second lowest voltage according to the open-circuit voltage table.
The third measurement module 23 is used for measuring a change value of the state of charge of the battery cell.
The first calculating module 24 is configured to calculate the remaining equilibrium capacity according to the lowest capacity index, the set attenuation index of the battery cell, and the set rated capacity of the battery cell.
In the embodiment of the present invention, the first calculating module 24 is specifically configured to use the formula Δ Capi＝(SOCi-SOCmin)*CapRated valueCalculating the residual equalization capacity by SOH, wherein Δ CapiFor said remaining equalized capacity, SOCiIs the capacity index, SOCminIs the lowest capacity index, CapRated valueFor the set rated capacity, SOH is the fade index.
In the embodiment of the present invention, the apparatus further includes: and an acquisition module 25.
The obtaining module 25 is configured to obtain the stored remaining balance capacity if the seventh determining module 20 determines that the standing time is smaller than the time threshold.
In the embodiment of the present invention, the equalizing module 15 includes: a measurement sub-module 151, a first calculation sub-module 152, a second calculation sub-module 153, a judgment sub-module 154, an opening sub-module 155, and a first storage sub-module 156.
The measuring submodule 151 is used to measure the equalization time of the battery cell.
The first calculation submodule 152 is configured to calculate an equalization current according to the first present voltage and the resistance of the battery cell.
The second calculating submodule 153 is used for calculating the equalized capacity according to the equalizing current and the equalizing time.
The determination sub-module 154 is used to determine whether the obtained remaining equalized capacity is larger than the equalized capacity.
The starting submodule 155 is configured to start cell balancing if the determining submodule 154 determines that the remaining balancing capacity is greater than the balanced capacity.
In this embodiment of the present invention, the prohibiting module 18 is specifically configured to, if the determining submodule 154 determines that the remaining equalization capacity is smaller than or equal to the equalized capacity, turn off the cell equalization.
In the embodiment of the present invention, the apparatus further includes: a second calculation module 26 and a storage module 27.
The second calculating module 26 is configured to calculate a difference between the remaining equalized capacity calculated by the first calculating module 24 and the equalized capacity calculated by the second calculating submodule 153.
The storage module 27 is configured to store the difference between the remaining equalization capacity and the equalized capacity calculated by the second calculation module 26.
The battery equalization enabling apparatus provided in this embodiment may be used to implement one of the battery equalization enabling methods in fig. 1 or fig. 2, and for specific description, reference may be made to an embodiment of the battery equalization enabling method, and a description thereof is not repeated here.
In the technical scheme of the battery equalization enabling method provided by the embodiment of the invention, whether an equalization instruction is received or not is judged; if the balancing instruction is judged not to be received, judging whether the cell type of the single battery comprises a lithium iron phosphate cell; when the change value of the charge state of the battery monomer of the lithium iron phosphate battery cell is smaller than the specified threshold value and the residual equilibrium capacity is larger than the calibrated capacity, the battery monomer is enabled in a balanced manner, the starting frequency of the battery in the balanced manner is improved, and therefore the balancing effect of the battery is improved.
An embodiment of the present invention provides a storage medium, where the storage medium includes a stored program, where, when the program runs, a device on which the storage medium is located is controlled to execute each step of the above embodiment of the battery balancing enabling method, and for a specific description, reference may be made to the above embodiment of the battery balancing enabling method.
An embodiment of the present invention provides a battery pack, including a memory and a processor, where the memory is used to store information including program instructions, and the processor is used to control execution of the program instructions, and the program instructions are loaded and executed by the processor to implement the steps of the above-mentioned embodiment of the battery balancing enabling method.
Fig. 5 is a schematic diagram of a battery pack according to an embodiment of the invention. As shown in fig. 5, the battery pack 40 of this embodiment includes: a processor 41, a memory 42, and a computer program 43 stored in the memory 42 and capable of running on the processor 41, wherein the computer program 43 is implemented to be applied to a battery equalization enabling method in the embodiment when executed by the processor 41, and for avoiding repetition, the detailed description is omitted here. Alternatively, the computer program is executed by the processor 41 to implement the functions of each model/unit applied to a battery equalization enabling apparatus in the embodiments, and for avoiding redundancy, the details are not repeated herein.
The battery pack 40 includes, but is not limited to, a processor 41 and a memory 42. Those skilled in the art will appreciate that fig. 5 is merely an example of a battery pack 40 and is not intended to limit the battery pack 40 and may include more or fewer components than shown, or some components may be combined, or different components, e.g., the battery pack may also include input output devices, network access devices, buses, etc.
The Processor 41 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 device, discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 42 may be an internal storage unit of the battery pack 40, such as a hard disk or a memory of the battery pack 40. The memory 42 may also be an external storage device of the battery pack 40, such as a plug-in hard disk provided on the battery pack 40, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like. Further, the memory 42 may also include both an internal storage unit of the battery pack 40 and an external storage device. The memory 42 is used to store computer programs and other programs and data required by the battery pack 40. The memory 42 may also be used to temporarily store data that has been output or is to be output.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The 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, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a Processor (Processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (9)

1. A method for enabling equalization of a battery, comprising:
judging whether a balancing instruction is received or not;
if the balancing instruction is judged not to be received, judging whether the cell type of the single battery comprises a lithium iron phosphate cell;
if the battery cell type is judged to comprise the lithium iron phosphate battery cell, judging whether the measured change value of the state of charge of the battery cell is smaller than a specified threshold value;
if the change value of the state of charge is smaller than a specified threshold value, judging whether the obtained residual equilibrium capacity of the single battery is larger than a set calibration capacity;
if the residual equilibrium capacity is judged to be larger than the calibration capacity, carrying out equilibrium enabling on the single battery;
before the step of judging whether the equalization instruction is received, the step of:
judging whether the standing time of the battery monomer is greater than or equal to a time threshold value;
if the standing time is judged to be greater than or equal to the time threshold, measuring a second current voltage of the single battery;
inquiring a capacity index corresponding to the second current voltage and an obtained lowest capacity index corresponding to the second lowest voltage according to an open circuit voltage table;
measuring a change value of the state of charge of the battery cell;
calculating the residual equilibrium capacity according to the lowest capacity index, the set attenuation index of the single battery and the set rated capacity of the single battery;
the second minimum voltage is a previously measured minimum voltage of the battery cell.
2. The method of claim 1, further comprising:
if the battery cell type does not include the lithium iron phosphate battery cell, measuring a first current voltage of the battery cell;
judging whether the difference value of the first current voltage and the acquired first lowest voltage is greater than a set calibration voltage difference or not;
if the difference value between the first current voltage and the first lowest voltage is larger than the calibration voltage difference, carrying out balance enabling on the single battery;
the first minimum voltage is a previously measured minimum voltage of the battery cell.
3. The method of claim 2, further comprising:
and if the change value of the state of charge is judged to be larger than or equal to the specified threshold value, continuing to execute the step of measuring the first current voltage of the battery cell.
4. The method of claim 1, further comprising:
if the balancing instruction is judged to be received, judging whether a balancing enabling channel of the single battery is opened or not;
if the balance enabling channel of the single battery is judged to be opened, performing balance enabling on the single battery;
and if the balancing enabling channel of the single battery is judged not to be opened, balancing forbidding the single battery.
5. The method of claim 1, further comprising:
and if the standing time is judged to be smaller than the time threshold, acquiring the stored residual equilibrium capacity.
6. The method of claim 2, wherein the enabling equalization of the battery cells comprises:
measuring the equalization time of the battery cells;
calculating an equalizing current according to the first current voltage and the resistance of the single battery;
calculating the balanced capacity according to the balanced current and the balanced time;
judging whether the obtained residual equilibrium capacity is larger than the equilibrium capacity;
and if the residual equalization capacity is judged to be larger than the equalized capacity, starting the cell equalization.
7. A battery equalization enabling apparatus, comprising:
the first judgment module is used for judging whether a balancing instruction is received or not;
the second judgment module is used for judging whether the cell type of the single battery comprises a lithium iron phosphate cell or not if the first judgment module judges that the balancing instruction is not received;
the third judging module is used for judging whether the measured change value of the charge state of the battery cell is smaller than a specified threshold value or not if the second judging module judges that the battery cell type comprises a lithium iron phosphate battery cell;
the fourth judging module is used for judging whether the obtained residual equilibrium capacity of the single battery is larger than the set calibration capacity or not if the third judging module judges that the change value of the state of charge is smaller than the specified threshold value;
the balancing module is used for performing balancing enabling on the single battery if the fourth judging module judges that the residual balancing capacity is larger than the calibration capacity;
the device further comprises:
the seventh judging module is used for judging whether the standing time of the single battery is greater than or equal to a time threshold value;
the second measurement module is used for measuring a second current voltage of the single battery if the seventh judgment module judges that the standing time is greater than or equal to the time threshold;
the query module is used for querying a capacity index corresponding to the second current voltage and an obtained lowest capacity index corresponding to the second lowest voltage according to the open-circuit voltmeter;
the third measuring module is used for measuring the change value of the state of charge of the battery monomer;
the first calculation module is used for calculating the residual equilibrium capacity according to the lowest capacity index, the set attenuation index of the single battery and the set rated capacity of the single battery;
the second minimum voltage is a previously measured minimum voltage of the battery cell.
8. A storage medium, comprising a stored program, wherein the program, when executed, controls an apparatus in which the storage medium is located to perform the battery balancing enabling method according to any one of claims 1 to 6.
9. A battery pack comprising a memory for storing information including program instructions and a processor for controlling the execution of the program instructions, wherein the program instructions are loaded and executed by the processor to implement the steps of the battery equalization enabling method according to any of the claims 1 to 6.
CN202010418523.3A 2020-05-18 2020-05-18 Battery equalization enabling method and device, storage medium and battery pack Active CN111490304B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010418523.3A CN111490304B (en) 2020-05-18 2020-05-18 Battery equalization enabling method and device, storage medium and battery pack

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010418523.3A CN111490304B (en) 2020-05-18 2020-05-18 Battery equalization enabling method and device, storage medium and battery pack

Publications (2)

Publication Number Publication Date
CN111490304A CN111490304A (en) 2020-08-04
CN111490304B true CN111490304B (en) 2021-09-07

Family

ID=71796462

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010418523.3A Active CN111490304B (en) 2020-05-18 2020-05-18 Battery equalization enabling method and device, storage medium and battery pack

Country Status (1)

Country Link
CN (1) CN111490304B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111983494B (en) * 2020-08-19 2023-06-02 重庆金康动力新能源有限公司 Method and system for prolonging service life of battery system
CN112541260B (en) * 2020-12-08 2024-04-19 深圳市吉毅创能源科技有限公司 Battery equalization control method, system, storage medium and electronic equipment
CN112737049B (en) * 2021-01-04 2023-04-14 珠海格力电器股份有限公司 Battery equalization control method and device and battery module
CN112599932A (en) 2021-01-08 2021-04-02 蔚来汽车科技(安徽)有限公司 Battery pack, method and vehicle
CN113036845B (en) * 2021-03-05 2023-03-24 万向一二三股份公司 Battery pack balancing strategy based on available capacity of battery cell
CN113054706A (en) * 2021-03-18 2021-06-29 中国第一汽车股份有限公司 Balance monitoring control system and method for power battery
CN113602148B (en) * 2021-08-31 2023-06-30 湖北亿纬动力有限公司 Balanced duration management method for full-time balancing
CN114755608A (en) * 2022-04-24 2022-07-15 重庆金康赛力斯新能源汽车设计院有限公司 Method and device for determining broken acquisition line, storage medium and main control board

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101917038A (en) * 2010-08-05 2010-12-15 惠州市亿能电子有限公司 Charge balancing control method of power battery pack
CN102074757A (en) * 2010-12-24 2011-05-25 惠州市亿能电子有限公司 Method for estimating charge states of lithium ion battery
CN102377218A (en) * 2010-08-12 2012-03-14 Fdktwicell株式会社 Battery charger and battery charging method
CN102868000A (en) * 2012-09-05 2013-01-09 浙江众泰新能源汽车科技有限公司 Power source balancing method of electric car
CN104505550A (en) * 2014-12-25 2015-04-08 宁德时代新能源科技有限公司 Passive equalizing method and system for lithium iron phosphate battery pack
CN204424402U (en) * 2014-12-25 2015-06-24 宁德时代新能源科技有限公司 The passive equalizing system of ferric phosphate lithium cell group
WO2017139967A1 (en) * 2016-02-19 2017-08-24 宁德时代新能源科技股份有限公司 Battery pack balancing method, battery management system and battery system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140091748A1 (en) * 2012-09-28 2014-04-03 Quantumscape Corporation Battery control systems

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101917038A (en) * 2010-08-05 2010-12-15 惠州市亿能电子有限公司 Charge balancing control method of power battery pack
CN102377218A (en) * 2010-08-12 2012-03-14 Fdktwicell株式会社 Battery charger and battery charging method
CN102074757A (en) * 2010-12-24 2011-05-25 惠州市亿能电子有限公司 Method for estimating charge states of lithium ion battery
CN102868000A (en) * 2012-09-05 2013-01-09 浙江众泰新能源汽车科技有限公司 Power source balancing method of electric car
CN104505550A (en) * 2014-12-25 2015-04-08 宁德时代新能源科技有限公司 Passive equalizing method and system for lithium iron phosphate battery pack
CN204424402U (en) * 2014-12-25 2015-06-24 宁德时代新能源科技有限公司 The passive equalizing system of ferric phosphate lithium cell group
WO2017139967A1 (en) * 2016-02-19 2017-08-24 宁德时代新能源科技股份有限公司 Battery pack balancing method, battery management system and battery system

Also Published As

Publication number Publication date
CN111490304A (en) 2020-08-04

Similar Documents

Publication Publication Date Title
CN111490304B (en) Battery equalization enabling method and device, storage medium and battery pack
CN111812531B (en) Battery state detection method, device and storage medium
CN109557477B (en) Battery system health state estimation method
CN110011374B (en) Control method and system for battery charging and discharging current and terminal equipment
CN109856542B (en) Calibration method of lithium battery SOC-OCV curve cluster, SOC correction method and device
CN102119338B (en) Apparatus and method for estimating state of health of battery based on battery voltage variation pattern
CN109991554B (en) Battery electric quantity detection method and device and terminal equipment
CN108061863A (en) Method and device for detecting battery, computer readable storage medium and battery management system
CN110456273A (en) A kind of battery SOC evaluation method, estimating system, electrokinetic cell system
WO2021258657A1 (en) Method and apparatus for acquiring state of health of battery, and storage medium
CN113359044A (en) Method, device and equipment for measuring residual capacity of battery
EP4152022B1 (en) Method for determining full-charge capacity of battery pack, method for determining state of health of battery pack, system, and apparatus
CN112213648B (en) Method and device for judging balanced opening of battery cells
JP2023550859A (en) Battery pack charging control method, device, electronic device and storage medium
CN113093027A (en) Battery SOC calibration method, device, system, medium and program product
AU2023208067A1 (en) Method and device for calibrating SOC at tail end of charging or discharging of energy storage system
CN112946482A (en) Battery voltage estimation method, device, equipment and storage medium based on model
CN117648899B (en) Battery modeling method, device, electronic equipment and storage medium
CN112731185A (en) Group matching method, group matching device and group matching system of lithium ion batteries
CN115303128A (en) Method, device, equipment and medium for calculating battery equalization time
CN115469239A (en) Method and device for evaluating consistency of state of charge of battery system and electronic equipment
CN111044924A (en) Method and system for determining residual capacity of all-condition battery
CN114137415A (en) Method and device for detecting calorific value of battery pack, vehicle, and storage medium
CN116626526B (en) Method, device, terminal and storage medium for detecting battery health state
CN116047339A (en) Lithium ion battery pack SOC estimation method and device based on thermoelectric coupling model

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