CN116373688B - Charging and discharging control method, device, equipment and storage medium of multi-element battery pack - Google Patents

Charging and discharging control method, device, equipment and storage medium of multi-element battery pack Download PDF

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Publication number
CN116373688B
CN116373688B CN202310657893.6A CN202310657893A CN116373688B CN 116373688 B CN116373688 B CN 116373688B CN 202310657893 A CN202310657893 A CN 202310657893A CN 116373688 B CN116373688 B CN 116373688B
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China
Prior art keywords
battery pack
fault
pack
charging
discharge
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CN116373688A (en
Inventor
刘小雄
罗院生
冯华
陈东海
黄功昭
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Shenzhen Toptec Technology Co ltd
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Shenzhen Toptec Technology Co ltd
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Classifications

    • 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
    • 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
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
    • 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
    • H02J7/00047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with provisions for charging different types of batteries
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • 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
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • 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
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • 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
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • 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
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/0071—Regulation of charging or discharging current or voltage with a programmable schedule
    • 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
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • 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
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
    • 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
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • 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
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
    • H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
    • 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
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Transportation (AREA)
  • Life Sciences & Earth Sciences (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)

Abstract

The application relates to the technical field of battery pack control, and discloses a charge and discharge control method, a device, equipment and a storage medium of a multi-element battery pack. The charging/discharging control method of the multi-cell pack comprises the steps of obtaining charging/discharging interface information of the multi-cell pack, determining the equipment type of the multi-cell pack access equipment according to the charging/discharging interface information, and performing charging/discharging control on the multi-cell pack according to the equipment type of the multi-cell pack access equipment, so that real-time control on the charging/discharging process of the multi-cell pack is realized, and the safety of the multi-cell pack is improved.

Description

Charging and discharging control method, device, equipment and storage medium of multi-element battery pack
Technical Field
The present application relates to the field of battery pack control technologies, and in particular, to a method, an apparatus, a device, and a storage medium for controlling charge and discharge of a multi-element battery pack.
Background
With the development of new energy technology, new energy automobiles have been widely used in daily life, however, at present, a power system of a new energy automobile generally only comprises one battery pack, meanwhile, because a charging facility of the new energy automobile is not perfect enough, the new energy automobile is difficult to realize long-time continuous voyage, so that many research and development personnel begin to replace a single battery pack by using a multi-battery pack to develop a novel power system suitable for the new energy automobile, thereby realizing long-time continuous voyage of the new energy automobile, but at present, the charging and discharging control technology of the multi-battery pack is not perfect enough, so that the safety of the multi-battery pack in the charging and discharging process is lower, and therefore, a method is needed to solve the problem.
Disclosure of Invention
The application provides a charge and discharge control method, a device, equipment and a storage medium of a multi-element battery pack, which are used for controlling the charge/discharge process of the multi-element battery pack in real time and improving the safety of the multi-element battery pack.
In a first aspect, the present application provides a charge and discharge control method for a multi-element battery pack, including:
acquiring charge-discharge interface information of the multi-cell pack, and determining equipment types of the multi-cell pack access equipment according to the charge-discharge interface information, wherein the equipment types comprise charging equipment and load equipment;
according to the equipment type of the multi-cell pack access equipment, carrying out charge/discharge control on the multi-cell pack; and if the equipment type of the multi-cell pack access equipment is the load equipment, performing discharge control on the multi-cell pack when the multi-cell pack is accessed to the load equipment, wherein the discharge control method comprises the following steps:
responding to a discharge signal of the load equipment, and respectively detecting each battery pack in the multi-element battery packs to obtain detection parameter information of each battery pack;
determining a fault-free battery pack in the multi-cell pack according to each piece of detection parameter information;
determining the non-fault battery pack with the highest priority according to the priority of each non-fault battery pack;
and the non-fault battery pack with the highest control priority supplies power to the load equipment.
In some implementations, if the device type of the multi-cell pack access device is the charging device, when the multi-cell pack is accessed to the charging device, performing charge control on the multi-cell pack, where the charge control method includes:
charging the multi-element battery packs in response to a charging signal of the charging equipment, and acquiring charging parameter information of each battery pack in the multi-element battery packs in real time;
and determining a fault battery pack in the multi-cell battery packs according to the charging parameter information of each battery pack, and stopping charging the fault battery pack.
In some implementations, the charging parameter information includes a charging temperature of the battery pack, a charging current of the battery pack, a charging voltage of each battery within the battery pack, the determining a faulty battery pack of the multi-cell battery pack from the charging parameter information of each battery pack includes:
comparing the charging temperature of the battery pack with a first preset temperature threshold; the first preset temperature threshold is a charging temperature range matched with the battery pack when the battery pack has no fault;
if the charging temperature of the battery pack is not within the first preset temperature threshold range, the battery pack is a fault battery pack;
or comparing the charging current of the battery pack with a first preset current threshold, wherein the first preset current threshold is a charging current range matched with the battery pack when the battery pack has no fault;
if the charging current of the battery pack is not in the first preset current threshold range, the battery pack is a fault battery pack;
or, calculating standard deviation of charging voltages of all batteries in the battery pack, and comparing the standard deviation of the charging voltages with a first preset standard deviation threshold; the first preset standard deviation threshold is a charging voltage standard deviation range matched with the battery pack when the battery pack has no fault;
and if the standard deviation of the charging voltage is not in the first preset standard deviation threshold range, the battery pack is a fault battery pack.
In some implementations, the detection parameter information includes a discharge current of the battery pack, a discharge temperature of the battery pack, and a discharge voltage of each battery within the battery pack, the detecting each battery pack in the multi-cell battery pack separately includes:
respectively utilizing each battery pack in the multi-element battery packs to supply power to the load equipment, and acquiring the discharge current of the battery pack, the discharge temperature of the battery pack and the discharge voltage of each battery in the battery pack;
the determining a fault-free battery pack in the multi-cell pack according to each detection parameter information comprises the following steps:
comparing the discharge temperature of the battery pack with a second preset temperature threshold, comparing the discharge current of the battery pack with a second preset current threshold, calculating standard deviations of discharge voltages of all batteries in the battery pack, and comparing the standard deviations of the discharge voltages with a second preset standard deviation threshold; the second preset temperature threshold is a discharge temperature range matched with the battery pack when the battery pack is free of faults, the second preset current threshold is a discharge current range matched with the battery pack when the battery pack is free of faults, and the second preset standard deviation threshold is a discharge voltage standard deviation range matched with the battery pack when the battery pack is free of faults;
and if all conditions that the charging temperature of the battery pack is within the second preset temperature threshold range, the discharging current of the battery pack is within the second preset current threshold range and the standard deviation of the discharging voltage is within the second preset standard deviation threshold range are met, the battery pack is a fault-free battery pack.
In some implementations, after the non-faulty battery pack with the highest control priority powers the load device, the method further includes:
acquiring the residual electricity value of the fault-free battery pack with the highest priority in real time;
comparing the residual electric quantity value with a preset electric quantity threshold value; the preset electric quantity threshold value is the minimum electric quantity value for enabling the fault-free battery pack with the highest priority to work normally;
if the residual electric quantity value is smaller than the preset electric quantity threshold value, controlling the DC/DC converter to work, and enabling the non-fault battery pack with the priority next to the highest priority to replace the non-fault battery pack with the highest priority to supply power for the load equipment;
acquiring output power of the fault-free battery pack with priority next to the highest priority, and comparing the output power with required power of the load device;
and if the output power is greater than the required power, controlling the DC/DC converter to work, so that the non-fault battery pack with the priority level lower than the highest priority level only charges the non-fault battery pack with the highest priority level while supplying power to the load equipment.
In a second aspect, the present application provides a charge/discharge control device for a multi-element battery pack, comprising:
the device comprises an acquisition module, a storage module and a control module, wherein the acquisition module is used for acquiring charge-discharge interface information of the multi-element battery pack and determining the device type of the multi-element battery pack access device according to the charge-discharge interface information, and the device type comprises a charging device and a load device;
and the control module is used for controlling the charge/discharge of the multi-cell pack according to the type of the multi-cell pack access equipment.
In a third aspect, the present application provides a terminal device comprising a processor, a memory, and a computer program stored on the memory and executable by the processor, wherein the computer program, when executed by the processor, implements any of the charge and discharge control methods of a multi-cell pack as described above.
In a fourth aspect, the present application provides a computer readable storage medium having a computer program stored thereon, wherein the computer program, when executed by the processor, implements any of the charge and discharge control methods of a multi-cell pack as described above.
The application provides a charge and discharge control method, a device, equipment and a storage medium of a multi-element battery pack, wherein the charge and discharge control method of the multi-element battery pack realizes real-time control of the charge and discharge process of the multi-element battery pack and improves the safety of the multi-element battery pack by acquiring charge and discharge interface information of the multi-element battery pack, determining the equipment type of multi-element battery pack access equipment according to the charge and discharge interface information, and performing charge/discharge control on the multi-element battery pack according to the equipment type of the multi-element battery pack access equipment.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a charge/discharge control method of a multi-cell pack according to an embodiment of the present application;
fig. 2 is a schematic block diagram of a charge/discharge control device of a multi-cell pack according to an embodiment of the present application;
fig. 3 is a schematic block diagram of a structure of a terminal device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The flow diagrams depicted in the figures are merely illustrative and not necessarily all of the elements and operations/steps are included or performed in the order described. For example, some operations/steps may be further divided, combined, or partially combined, so that the order of actual execution may be changed according to actual situations.
It is also to be understood that the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification 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 further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Along with the development of new energy technology, new energy automobiles are widely applied in daily life, however, at present, a power system of the new energy automobiles generally only comprises one battery pack, meanwhile, because a charging facility of the new energy automobiles is not perfect enough, the new energy automobiles are difficult to realize long-time continuous voyage, so that many research and development personnel begin to replace a single battery pack by utilizing a multi-battery pack to develop a novel power system suitable for the new energy automobiles, thereby realizing long-time continuous voyage of the new energy automobiles, but the current charge and discharge control technology of the multi-battery pack is not perfect enough, and the safety of the multi-battery pack in the charge and discharge process is lower. Therefore, the embodiment of the application provides a charge and discharge control method, a device, equipment and a storage medium of a multi-element battery pack, so as to solve the problems.
Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
Referring to fig. 1, fig. 1 is a flowchart illustrating a charge and discharge control method of a multi-cell pack according to an embodiment of the application, and as shown in fig. 1, the charge and discharge control method of the multi-cell pack according to the embodiment of the application includes steps S100 to S200.
And step S100, acquiring charge-discharge interface information of the multi-cell pack, and determining equipment types of the multi-cell pack access equipment according to the charge-discharge interface information, wherein the equipment types comprise charging equipment and load equipment.
The multi-element battery pack at least comprises two battery packs, a charging and discharging interface of the multi-element battery pack can be an interface which can identify the equipment Type of the multi-element battery pack access equipment, such as a USB interface and a Type-C interface, the charging equipment can be equipment which can charge the multi-element battery pack, such as a charging pile or a household power supply, and the load equipment is a new energy automobile.
And step 200, performing charge/discharge control on the multi-cell pack according to the type of the multi-cell pack access equipment.
In order to prevent some potential safety hazards (such as fire) caused by faults of the multi-cell pack during the charge/discharge process, step S200 controls the multi-cell pack in real time during the charge/discharge process of the multi-cell pack.
According to the embodiment, the charging/discharging control is carried out on the multi-element battery pack by acquiring the charging/discharging interface information of the multi-element battery pack, determining the equipment type of the multi-element battery pack access equipment according to the charging/discharging interface information, and carrying out the charging/discharging control on the multi-element battery pack according to the equipment type of the multi-element battery pack access equipment, so that the charging/discharging process of the multi-element battery pack is controlled in real time, and the safety of the multi-element battery pack is improved.
In some embodiments, the type of the multi-cell pack access device is the load device, and when the multi-cell pack is accessed to the load device, the discharging control is performed on the multi-cell pack, and the method of the discharging control includes steps S211 to S214.
Step S211, responding to the discharging signal of the load device, and detecting each battery pack in the multiple battery packs to obtain the detection parameter information of each battery pack.
Wherein the discharge signal of the load device is a start signal of the load device.
And step S212, determining a fault-free battery pack in the multi-cell packs according to each piece of detection parameter information.
It is understood that each of the detection parameter information corresponds to one of the battery packs, and each of the detection parameter information may include a plurality of detection parameters, for example, each of the detection parameter information includes a discharge current, a discharge voltage, a discharge temperature, and the like.
And step S213, determining the non-fault battery pack with the highest priority according to the priority of each non-fault battery pack.
Illustratively, the multi-element battery pack includes a No. 1 battery pack, a No. 2 battery pack, a No. 3 battery pack, a No. 4 battery pack, and a No. 5 battery pack with sequentially reduced priorities, wherein a failure-free battery pack obtained after each battery pack is detected is a No. 2 battery pack, a No. 3 battery pack, and a No. 5 battery pack, and the failure-free battery pack with the highest priority is a No. 2 battery pack.
And step S214, the fault-free battery pack with the highest control priority supplies power to the load equipment.
It can be understood that all the other non-fault battery packs except the non-fault battery pack with the highest priority can be used as the standby battery pack of the new energy automobile in the running process, so that the endurance time of the new energy automobile is improved, and meanwhile, the safety of the multi-element battery pack is also improved.
In some embodiments, after step S214, the method of discharge control further includes steps S215 to S219.
And step S215, acquiring the residual electricity value of the fault-free battery pack with the highest priority in real time.
Step S216, comparing the residual electric quantity value with a preset electric quantity threshold value; the preset electric quantity threshold value is the minimum electric quantity value for enabling the fault-free battery pack with the highest priority to work normally.
And step S217, if the residual electric quantity value is smaller than the preset electric quantity threshold value, controlling the DC/DC converter to work, so that the non-fault battery pack with the highest priority is replaced by the non-fault battery pack with the highest priority, and supplying power to the load equipment.
It will be appreciated that the DC/DC converter is provided between each of the battery packs to enable replacement between each of the battery packs. If the residual electric quantity value is smaller than the preset electric quantity threshold value, if the fault-free battery pack with the highest priority is used for continuously supplying power to the load equipment, a certain potential safety hazard can be caused and the working performance of the load equipment can be influenced, so that the fault-free battery pack with the highest priority needs to be replaced by other fault-free battery packs to prevent the situation, and the battery pack with the highest priority in the other fault-free battery packs is selected to be replaced.
Step S218, obtaining the output power of the non-faulty battery pack having the priority next to the highest priority, and comparing the output power with the required power of the load device.
And step S219, if the output power is greater than the required power, controlling the DC/DC converter to work, so that the non-fault battery pack with the priority level lower than the highest priority level only charges the non-fault battery pack with the highest priority level while supplying power to the load equipment.
It can be understood that when the output power is greater than the required power, the working performance of the load device may be affected, the service life of the load device is shortened, and by adopting steps S218 to S219, the load device is protected, and meanwhile, the fault-free battery pack with the highest priority is charged, so that the service life of the fault-free battery pack with the highest priority can be improved.
In some embodiments, the detection parameter information includes a discharge current of the battery pack, a discharge temperature of the battery pack, and a discharge voltage of each battery in the battery pack, and the step S211 may be implemented by:
and power is supplied to the load equipment by utilizing each battery pack in the multi-battery packs in sequence, and the discharging current of the battery packs, the discharging temperature of the battery packs and the discharging voltage of each battery in the battery packs are obtained.
Step S212 may be implemented as follows:
comparing the discharge temperature of the battery pack with a second preset temperature threshold, comparing the discharge current of the battery pack with a second preset current threshold, calculating standard deviations of discharge voltages of all batteries in the battery pack, and comparing the standard deviations of the discharge voltages with a second preset standard deviation threshold; the second preset temperature threshold is a discharge temperature range matched with the battery pack when the battery pack is free of faults, the second preset current threshold is a discharge current range matched with the battery pack when the battery pack is free of faults, and the second preset standard deviation threshold is a discharge voltage standard deviation range matched with the battery pack when the battery pack is free of faults;
and if all conditions that the charging temperature of the battery pack is within the second preset temperature threshold range, the discharging current of the battery pack is within the second preset current threshold range and the standard deviation of the discharging voltage is within the second preset standard deviation threshold range are met, the battery pack is a fault-free battery pack.
It should be noted that, each battery pack corresponds to a set of the second preset temperature threshold range, and the second preset standard deviation threshold range, and the second preset temperature threshold range, and the second preset standard deviation threshold range corresponding to different battery packs may be different, so as to achieve accurate control of each battery pack.
According to the multi-dimensional detection method, the multi-dimensional detection is carried out on each battery pack, when the battery packs accord with preset conditions of each dimension, the battery packs are determined to be fault-free battery packs, and therefore safety of the multi-element battery packs is further improved.
In some embodiments, the device type of the multi-cell pack access device is the charging device, and when the multi-cell pack is accessed to the charging device, the charging control is performed on the multi-cell pack, and the method of the charging control includes steps S221 to S222.
S221, responding to a charging signal of the charging equipment, charging the multi-cell package, and acquiring charging parameter information of each cell package in the multi-cell package in real time.
For example, the charging signal may be generated by a user triggering a charging button on the charging device.
S222, determining a fault battery pack in the multi-cell battery packs according to the charging parameter information of each battery pack, and stopping charging the fault battery pack.
It will be appreciated that in the event of a failure of the battery pack, if the battery pack is to be charged, some safety hazard may be raised, and therefore, the battery pack having the failure needs to be stopped from being charged.
In some embodiments, the charging parameter information includes a charging temperature of the battery pack, a charging current of the battery pack, and a charging voltage of each battery in the battery pack, and step S222 may be implemented by:
comparing the charging temperature of the battery pack with a first preset temperature threshold; the first preset temperature threshold is a charging temperature range matched with the battery pack when the battery pack has no fault;
if the charging temperature of the battery pack is not within the first preset temperature threshold range, the battery pack is a fault battery pack;
or comparing the charging current of the battery pack with a first preset current threshold, wherein the first preset current threshold is a charging current range matched with the battery pack when the battery pack has no fault;
if the charging current of the battery pack is not in the first preset current threshold range, the battery pack is a fault battery pack;
or, calculating standard deviation of charging voltages of all batteries in the battery pack, and comparing the standard deviation of the charging voltages with a first preset standard deviation threshold; the first preset standard deviation threshold is a charging voltage standard deviation range matched with the battery pack when the battery pack has no fault;
and if the standard deviation of the charging voltage is not in the first preset standard deviation threshold range, the battery pack is a fault battery pack.
It should be noted that, each battery pack corresponds to a set of the first preset temperature threshold range, and the first preset standard deviation threshold range, and the first preset temperature threshold range, and the second preset standard deviation threshold range corresponding to different battery packs may be different, so as to achieve accurate control of each battery pack.
According to the multi-dimensional monitoring method, the multi-dimensional monitoring is conducted on each battery pack, and when the battery packs do not meet preset conditions of any dimension, the battery packs are determined to be fault battery packs, so that the safety of the multi-element battery packs is further improved.
Referring to fig. 2, fig. 2 is a schematic block diagram of a charge/discharge control device 100 of a multi-cell battery pack according to an embodiment of the present application, and as shown in fig. 2, the schematic block diagram of the charge/discharge control device 100 includes:
the obtaining module 110 is configured to obtain charge-discharge interface information of the multi-element battery pack, and determine a device type of the multi-element battery pack access device according to the charge-discharge interface information, where the device type includes a charging device and a load device.
And the control module 120 is used for controlling the charge/discharge of the multi-cell package according to the type of the multi-cell package access equipment.
In some embodiments, the type of the multi-cell packet access device is the load device, and when the multi-cell packet is accessed to the load device, the control module 120 performs the following steps:
responding to a discharge signal of the load equipment, and respectively detecting each battery pack in the multi-element battery packs to obtain detection parameter information of each battery pack;
determining a fault-free battery pack in the multi-cell pack according to each piece of detection parameter information;
determining the non-fault battery pack with the highest priority according to the priority of each non-fault battery pack;
and the non-fault battery pack with the highest control priority supplies power to the load equipment.
In some embodiments, the device type of the multi-cell pack access device is the charging device, and when the device type of the multi-cell pack access device is the charging device, the control module 120 performs the following steps:
charging the multi-element battery packs in response to a charging signal of the charging equipment, and acquiring charging parameter information of each battery pack in the multi-element battery packs in real time;
and determining a fault battery pack in the multi-cell battery packs according to the charging parameter information of each battery pack, and stopping charging the fault battery pack.
It should be noted that, for convenience and brevity of description, specific working processes of the above-described device and each module may refer to corresponding processes in the foregoing embodiments of the charge/discharge control method of the multi-element battery pack, which are not described herein again.
Referring to fig. 3, fig. 3 is a schematic block diagram of a structure of a terminal device 200 according to an embodiment of the present application, where the terminal device 200 includes a processor 201 and a memory 202, and the processor 201 and the memory 202 are connected through a system bus 203, and the memory 202 may include a nonvolatile storage medium and an internal memory.
The non-volatile storage medium may store a computer program. The computer program comprises program instructions that, when executed by the processor 201, cause the processor 201 to perform any of the above-described methods of controlling charge and discharge of a multi-cell pack.
The processor 201 is used to provide computing and control capabilities supporting the operation of the overall terminal device 200.
The internal memory provides an environment for the execution of a computer program in a non-volatile storage medium, which when executed by the processor 201, causes the processor 201 to perform any of the above-described methods of charge and discharge control of a multi-cell pack.
It will be appreciated by those skilled in the art that the structure shown in fig. 3 is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation of the terminal device 200 related to the present application, and that a specific terminal device 200 may include more or less components than those shown in the drawings, or may combine some components, or have a different arrangement of components.
It should be appreciated that the processor 201 may be a central processing unit (Central Processing Unit, CPU), and the processor 201 may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. Wherein the general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
In some embodiments, the processor 201 is configured to execute a computer program stored in the memory to implement the following steps:
acquiring charge-discharge interface information of the multi-cell pack, and determining equipment types of the multi-cell pack access equipment according to the charge-discharge interface information, wherein the equipment types comprise charging equipment and load equipment;
and according to the equipment type of the multi-cell pack access equipment, carrying out charge/discharge control on the multi-cell pack.
In some embodiments, the device type of the multi-cell packet access device is the load device, and when the device type of the multi-cell packet access device is the load device, the processor 201 is configured to, when implementing the charge/discharge control on the multi-cell packet according to the device type of the multi-cell packet access device, implement:
responding to a discharge signal of the load equipment, and respectively detecting each battery pack in the multi-element battery packs to obtain detection parameter information of each battery pack;
determining a fault-free battery pack in the multi-cell pack according to each piece of detection parameter information;
determining the non-fault battery pack with the highest priority according to the priority of each non-fault battery pack;
and the non-fault battery pack with the highest control priority supplies power to the load equipment.
In some embodiments, the device type of the multi-cell pack access device is the charging device, and when the multi-cell pack is accessed to the charging device, the processor 201 is configured to, when implementing the charge/discharge control on the multi-cell pack according to the device type of the multi-cell pack access device, implement:
charging the multi-element battery packs in response to a charging signal of the charging equipment, and acquiring charging parameter information of each battery pack in the multi-element battery packs in real time;
and determining a fault battery pack in the multi-cell battery packs according to the charging parameter information of each battery pack, and stopping charging the fault battery pack.
In some embodiments, the charging parameter information includes a charging temperature of the battery pack, a charging current of the battery pack, and a charging voltage of each battery in the battery pack, and the processor 201 is configured to, when implementing the determining, according to the charging parameter information of each battery pack, implement:
comparing the charging temperature of the battery pack with a first preset temperature threshold; the first preset temperature threshold is a charging temperature range matched with the battery pack when the battery pack has no fault;
if the charging temperature of the battery pack is not within the first preset temperature threshold range, the battery pack is a fault battery pack;
or comparing the charging current of the battery pack with a first preset current threshold, wherein the first preset current threshold is a charging current range matched with the battery pack when the battery pack has no fault;
if the charging current of the battery pack is not in the first preset current threshold range, the battery pack is a fault battery pack;
or, calculating standard deviation of charging voltages of all batteries in the battery pack, and comparing the standard deviation of the charging voltages with a first preset standard deviation threshold; the first preset standard deviation threshold is a charging voltage standard deviation range matched with the battery pack when the battery pack has no fault;
and if the standard deviation of the charging voltage is not in the first preset standard deviation threshold range, the battery pack is a fault battery pack.
In some embodiments, the detection parameter information includes a discharge current of the battery pack, a discharge temperature of the battery pack, and a discharge voltage of each battery in the battery pack, and the processor 201 is configured to, when implementing detection of each battery pack in the multi-cell pack, implement:
respectively utilizing each battery pack in the multi-element battery packs to supply power to the load equipment, and acquiring the discharge current of the battery pack, the discharge temperature of the battery pack and the discharge voltage of each battery in the battery pack;
the processor 201, when implementing the determining, according to each of the detection parameter information, a fault-free battery pack in the multi-cell pack, is configured to implement:
respectively utilizing each battery pack in the multi-element battery packs to supply power to the load equipment, and acquiring the discharge current of the battery pack, the discharge temperature of the battery pack and the discharge voltage of each battery in the battery pack;
the determining a fault-free battery pack in the multi-cell pack according to each detection parameter information comprises the following steps:
comparing the discharge temperature of the battery pack with a second preset temperature threshold, comparing the discharge current of the battery pack with a second preset current threshold, calculating standard deviations of discharge voltages of all batteries in the battery pack, and comparing the standard deviations of the discharge voltages with a second preset standard deviation threshold; the second preset temperature threshold is a discharge temperature range matched with the battery pack when the battery pack is free of faults, the second preset current threshold is a discharge current range matched with the battery pack when the battery pack is free of faults, and the second preset standard deviation threshold is a discharge voltage standard deviation range matched with the battery pack when the battery pack is free of faults;
and if all conditions that the charging temperature of the battery pack is within the second preset temperature threshold range, the discharging current of the battery pack is within the second preset current threshold range and the standard deviation of the discharging voltage is within the second preset standard deviation threshold range are met, the battery pack is a fault-free battery pack.
In some embodiments, after implementing the fault-free battery pack with the highest control priority to power the load device, the processor 201 is further configured to implement:
acquiring the residual electricity value of the fault-free battery pack with the highest priority in real time;
comparing the residual electric quantity value with a preset electric quantity threshold value; the preset electric quantity threshold value is the minimum electric quantity value for enabling the fault-free battery pack with the highest priority to work normally;
if the residual electric quantity value is smaller than the preset electric quantity threshold value, controlling the DC/DC converter to work, and enabling the non-fault battery pack with the priority next to the highest priority to replace the non-fault battery pack with the highest priority to supply power for the load equipment;
acquiring output power of the fault-free battery pack with priority next to the highest priority, and comparing the output power with required power of the load device;
and if the output power is greater than the required power, controlling the DC/DC converter to work, so that the non-fault battery pack with the priority level lower than the highest priority level only charges the non-fault battery pack with the highest priority level while supplying power to the load equipment.
It should be noted that, for convenience and brevity of description, the specific working process of the terminal device 200 described above may refer to the corresponding process of the charge/discharge control method of the multi-cell package, and will not be described herein.
The embodiment of the application also provides a computer readable storage medium, which stores a computer program, and the computer program when executed by one or more processors causes the one or more processors to implement the charge and discharge control method of the multi-cell battery pack provided by the embodiment of the application.
The computer readable storage medium may be an internal storage unit of the terminal device 200 of the foregoing embodiment, for example, a hard disk or a memory of the terminal device 200. The computer readable storage medium may also be an external storage device of the terminal device 200, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like, which the terminal device 200 is equipped with.
While the application has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims (7)

1. A charge-discharge control method of a multi-cell pack, wherein each cell pack of the multi-cell pack has a different priority, the method comprising:
acquiring charge-discharge interface information of the multi-cell pack, and determining equipment types of the multi-cell pack access equipment according to the charge-discharge interface information, wherein the equipment types comprise charging equipment and load equipment;
according to the equipment type of the multi-cell pack access equipment, carrying out charge/discharge control on the multi-cell pack; and if the equipment type of the multi-cell pack access equipment is the load equipment, performing discharge control on the multi-cell pack when the multi-cell pack is accessed to the load equipment, wherein the discharge control method comprises the following steps:
responding to a discharge signal of the load equipment, and respectively detecting each battery pack in the multi-element battery packs to obtain detection parameter information of each battery pack;
determining a fault-free battery pack in the multi-cell pack according to each piece of detection parameter information;
determining the non-fault battery pack with the highest priority according to the priority of each non-fault battery pack;
the fault-free battery pack with highest control priority supplies power to the load equipment;
acquiring the residual electricity value of the fault-free battery pack with the highest priority in real time;
comparing the residual electric quantity value with a preset electric quantity threshold value; the preset electric quantity threshold value is the minimum electric quantity value for enabling the fault-free battery pack with the highest priority to work normally;
if the residual electric quantity value is smaller than the preset electric quantity threshold value, controlling the DC/DC converter to work, and enabling the non-fault battery pack with the priority next to the highest priority to replace the non-fault battery pack with the highest priority to supply power for the load equipment;
acquiring output power of the fault-free battery pack with priority next to the highest priority, and comparing the output power with required power of the load device;
and if the output power is greater than the required power, controlling the DC/DC converter to work, so that the non-fault battery pack with the priority level lower than the highest priority level only charges the non-fault battery pack with the highest priority level while supplying power to the load equipment.
2. The charge and discharge control method of a multi-cell pack according to claim 1, wherein if the device type of the multi-cell pack access device is the charging device, the multi-cell pack is charge-controlled when the multi-cell pack is accessed to the charging device, the charge control method comprising:
charging the multi-element battery packs in response to a charging signal of the charging equipment, and acquiring charging parameter information of each battery pack in the multi-element battery packs in real time;
and determining a fault battery pack in the multi-cell battery packs according to the charging parameter information of each battery pack, and stopping charging the fault battery pack.
3. The charge-discharge control method of a multi-cell pack according to claim 2, wherein the charge parameter information includes a charge temperature of the cell pack, a charge current of the cell pack, a charge voltage of each cell in the cell pack, and the determining a faulty cell pack of the multi-cell pack according to the charge parameter information of each cell pack includes:
comparing the charging temperature of the battery pack with a first preset temperature threshold; the first preset temperature threshold is a charging temperature range matched with the battery pack when the battery pack has no fault;
if the charging temperature of the battery pack is not within the first preset temperature threshold range, the battery pack is a fault battery pack;
or comparing the charging current of the battery pack with a first preset current threshold, wherein the first preset current threshold is a charging current range matched with the battery pack when the battery pack has no fault;
if the charging current of the battery pack is not in the first preset current threshold range, the battery pack is a fault battery pack;
or, calculating standard deviation of charging voltages of all batteries in the battery pack, and comparing the standard deviation of the charging voltages with a first preset standard deviation threshold; the first preset standard deviation threshold is a charging voltage standard deviation range matched with the battery pack when the battery pack has no fault;
and if the standard deviation of the charging voltage is not in the first preset standard deviation threshold range, the battery pack is a fault battery pack.
4. The charge-discharge control method of a multi-cell pack according to claim 1, wherein the detection parameter information includes a discharge current of the cell pack, a discharge temperature of the cell pack, and a discharge voltage of each cell in the cell pack, the detecting each cell pack in the multi-cell pack, respectively, includes:
respectively utilizing each battery pack in the multi-element battery packs to supply power to the load equipment, and acquiring the discharge current of the battery pack, the discharge temperature of the battery pack and the discharge voltage of each battery in the battery pack;
the determining a fault-free battery pack in the multi-cell pack according to each detection parameter information comprises the following steps:
comparing the discharge temperature of the battery pack with a second preset temperature threshold, comparing the discharge current of the battery pack with a second preset current threshold, calculating standard deviations of discharge voltages of all batteries in the battery pack, and comparing the standard deviations of the discharge voltages with a second preset standard deviation threshold; the second preset temperature threshold is a discharge temperature range matched with the battery pack when the battery pack is free of faults, the second preset current threshold is a discharge current range matched with the battery pack when the battery pack is free of faults, and the second preset standard deviation threshold is a discharge voltage standard deviation range matched with the battery pack when the battery pack is free of faults;
and if all conditions that the charging temperature of the battery pack is within the second preset temperature threshold range, the discharging current of the battery pack is within the second preset current threshold range and the standard deviation of the discharging voltage is within the second preset standard deviation threshold range are met, the battery pack is a fault-free battery pack.
5. A charge/discharge control device for a multi-element battery pack, comprising:
the device comprises an acquisition module, a storage module and a control module, wherein the acquisition module is used for acquiring charge-discharge interface information of the multi-element battery pack and determining the device type of the multi-element battery pack access device according to the charge-discharge interface information, and the device type comprises a charging device and a load device;
the control module is used for controlling the charge/discharge of the multi-cell pack according to the type of the multi-cell pack access equipment;
wherein, when the multi-cell pack is connected to the load device, the control module is configured to perform the following steps:
responding to a discharge signal of the load equipment, and respectively detecting each battery pack in the multi-element battery packs to obtain detection parameter information of each battery pack;
determining a fault-free battery pack in the multi-cell pack according to each piece of detection parameter information;
determining the non-fault battery pack with the highest priority according to the priority of each non-fault battery pack;
the fault-free battery pack with highest control priority supplies power to the load equipment;
acquiring the residual electricity value of the fault-free battery pack with the highest priority in real time;
comparing the residual electric quantity value with a preset electric quantity threshold value; the preset electric quantity threshold value is the minimum electric quantity value for enabling the fault-free battery pack with the highest priority to work normally;
if the residual electric quantity value is smaller than the preset electric quantity threshold value, controlling the DC/DC converter to work, and enabling the non-fault battery pack with the priority next to the highest priority to replace the non-fault battery pack with the highest priority to supply power for the load equipment;
acquiring output power of the fault-free battery pack with priority next to the highest priority, and comparing the output power with required power of the load device;
and if the output power is greater than the required power, controlling the DC/DC converter to work, so that the non-fault battery pack with the priority level lower than the highest priority level only charges the non-fault battery pack with the highest priority level while supplying power to the load equipment.
6. A terminal device comprising a processor, a memory, and a computer program stored on the memory and executable by the processor, wherein the computer program, when executed by the processor, implements the charge and discharge control method of the multi-cell pack according to any one of claims 1 to 4.
7. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and wherein the computer program, when executed by a processor, implements the charge/discharge control method of the multi-cell pack according to any one of claims 1 to 4.
CN202310657893.6A 2023-06-06 2023-06-06 Charging and discharging control method, device, equipment and storage medium of multi-element battery pack Active CN116373688B (en)

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CN104868546A (en) * 2015-05-25 2015-08-26 沈阳中科一唯电子技术有限公司 Cell management system
KR20190064403A (en) * 2017-11-30 2019-06-10 허민 A device for determining the battery cell rating of a battery pack
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