WO2023168678A1 - 电池加热的方法、充电装置和电池管理系统 - Google Patents

电池加热的方法、充电装置和电池管理系统 Download PDF

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Publication number
WO2023168678A1
WO2023168678A1 PCT/CN2022/080263 CN2022080263W WO2023168678A1 WO 2023168678 A1 WO2023168678 A1 WO 2023168678A1 CN 2022080263 W CN2022080263 W CN 2022080263W WO 2023168678 A1 WO2023168678 A1 WO 2023168678A1
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WIPO (PCT)
Prior art keywords
power battery
charging device
charging
battery
instruction information
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Ceased
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PCT/CN2022/080263
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English (en)
French (fr)
Inventor
李占良
颜昱
但志敏
陈新伟
赵元淼
黄孝键
高锦凤
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Contemporary Amperex Technology Co Ltd
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Contemporary Amperex Technology 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.)
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Publication date
Application filed by Contemporary Amperex Technology Co Ltd filed Critical Contemporary Amperex Technology Co Ltd
Priority to PCT/CN2022/080263 priority Critical patent/WO2023168678A1/zh
Priority to CN202280004148.5A priority patent/CN115668587A/zh
Priority to CN202510226489.2A priority patent/CN119994308A/zh
Priority to EP22930317.7A priority patent/EP4369475A4/en
Publication of WO2023168678A1 publication Critical patent/WO2023168678A1/zh
Priority to US18/370,418 priority patent/US20240010103A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
    • 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
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—Constructional details of charging stations
    • 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
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/50—Charging stations characterised by energy-storage or power-generation means
    • B60L53/53—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
    • 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
    • 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
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H01M10/635—Control systems based on ambient temperature
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/40—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries characterised by the exchange of charge or discharge related data
    • H02J7/42—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries characterised by the exchange of charge or discharge related data with electronic devices having internal batteries, e.g. mobile phones
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/80—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including monitoring or indicating arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/875—Charging or discharging for charge maintenance, battery initiation or rejuvenation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/90—Regulation of charging or discharging current or voltage
    • H02J7/94—Regulation of charging or discharging current or voltage in response to battery current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/90—Regulation of charging or discharging current or voltage
    • H02J7/96—Regulation of charging or discharging current or voltage in response to battery voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/90—Regulation of charging or discharging current or voltage
    • H02J7/971—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/975—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
    • H02J7/977—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
    • 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
    • B60L2210/00—Converter types
    • B60L2210/10—DC to DC converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2105/00—Networks for supplying or distributing electric power characterised by their spatial reach or by the load
    • H02J2105/30—Networks for supplying or distributing electric power characterised by their spatial reach or by the load the load networks being external to vehicles, i.e. exchanging power with vehicles
    • H02J2105/33—Networks for supplying or distributing electric power characterised by their spatial reach or by the load the load networks being external to vehicles, i.e. exchanging power with vehicles exchanging power with road vehicles
    • H02J2105/37—Networks for supplying or distributing electric power characterised by their spatial reach or by the load the load networks being external to vehicles, i.e. exchanging power with vehicles exchanging power with road vehicles exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Details of circuit arrangements for charging or discharging batteries or supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/007—Plural converter units in cascade
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
    • H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33573—Full-bridge at primary side of an isolation transformer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
    • H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33576—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
    • H02M3/33584—Bidirectional converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/66—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal
    • H02M7/68—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters
    • H02M7/72—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/79—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/797—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • 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

Definitions

  • the present application relates to the field of battery technology, and in particular to a battery heating method, charging device and battery management system.
  • This application provides a battery heating method, charging device and battery management system, which can effectively heat the power battery.
  • a method for heating a battery is provided, which is executed by a charging device.
  • the method includes: before the charging device charges a power battery, receiving first indication information from a control device of the power battery, and the third An instruction information is used to instruct the charging device to heat the power battery; according to the first instruction information, the power battery is heated.
  • Charging the power battery at low temperatures may cause problems such as lithium precipitation, affecting the safety of the power battery.
  • the control device of the power battery before charging the power battery, if the temperature of the power battery is low, the control device of the power battery will send first instruction information to the charging device to instruct it to heat the power battery.
  • the charging device receives The first indication information is used to heat the power battery based on the first indication information, thereby avoiding damage to the power battery caused by low-temperature charging.
  • the first indication information includes information on the amplitude and/or frequency of the pulse current used to heat the power battery.
  • the frequency of the pulse current used to heat different power batteries may be different.
  • the control device of the power battery may determine the amplitude and/or frequency information of the pulse current used to heat the power battery, and use the pulse current to heat the power battery. This information is carried in the first instruction information, so that the charging device heats the power battery based on appropriate pulse current to improve the heating performance.
  • the charging device includes a bidirectional DC/DC converter
  • heating the power battery according to the first indication information includes: controlling the bidirectional DC/DC converter to form a A circuit for discharging the power battery to the charging device and a circuit for charging the power battery from the charging device to heat the power battery during the process of discharging and charging.
  • the bidirectional DC/DC converter includes multiple switching tubes.
  • each switching tube in the bidirectional DC/DC converter can be controlled to charge and discharge alternately between the power battery and the charging device, thereby charging and discharging.
  • the power battery is heated during the discharge process.
  • the charging device further includes an AC/DC converter, and the AC/DC converter and the bidirectional DC/DC converter are connected between the AC power supply and the power battery.
  • the charging device further includes an energy storage battery, and the bidirectional DC/DC converter is connected between the energy storage battery and the power battery.
  • the method further includes: receiving second indication information from the control device, the second indication information being used to instruct the charging device to stop heating the power battery; according to the first 2. Instruction information to stop heating the power battery.
  • the method further includes: receiving third indication information from the control device, the third indication information being used to instruct the charging device to charge the power battery, the third indication information includes information on charging voltage and/or charging current; charge the power battery according to the third instruction information.
  • the control device of the power battery after heating the power battery to a predetermined temperature, the control device of the power battery will send third instruction information to the charging device to instruct it to charge the power battery.
  • the charging device receives the third instruction information and charges the power battery based on the third instruction. Information recharges the power battery. Since the temperature of the power battery has increased at this time, damage to the power battery caused by low-temperature charging is avoided and the safety of the power battery is ensured.
  • the method further includes: receiving fourth indication information from the control device, the fourth indication information being used to instruct the charging device to stop charging the power battery; according to the fourth Instruction message to stop charging the power battery.
  • a battery heating method is provided, which is executed by the battery management system BMS of the power battery.
  • the method includes: obtaining the temperature of the power battery before the charging device charges the power battery; if the power battery When the temperature of the battery is less than the temperature threshold, first instruction information is sent to the charging device, and the first instruction information is used to instruct the charging device to heat the power battery.
  • Charging the power battery at low temperatures may cause problems such as lithium precipitation, affecting the safety of the power battery.
  • the BMS before charging the power battery, if the temperature of the power battery is low, the BMS will send the first instruction information to the charging device to instruct it to heat the power battery, and the charging device receives the first instruction information.
  • the power battery is heated based on the first indication information to avoid damage to the power battery caused by low-temperature charging.
  • the first indication information includes information on the amplitude and/or frequency of the pulse current used to heat the power battery.
  • the frequency of the pulse current used to heat different power batteries may be different.
  • the BMS can determine the amplitude and/or frequency information of the pulse current used to heat the power battery, and carry the pulse current information in the third In an indication message, the charging device heats the power battery based on appropriate pulse current to improve the heating performance.
  • the method before sending the first indication information to the charging device, the method further includes: determining the pulse according to preset correspondences between multiple temperatures and multiple amplitudes.
  • the maximum amplitude of the current is the amplitude corresponding to the temperature of the power battery; and/or, according to the preset correspondence between multiple temperatures and multiple frequencies, the frequency of the pulse current is determined to be the same as the The frequency corresponding to the temperature of the power battery.
  • the BMS can determine the maximum amplitude and/or frequency of the pulse current corresponding to the current temperature through table lookup and other methods, making the implementation simple and accurate.
  • the method further includes: when the temperature of the power battery is greater than or equal to the temperature threshold, sending second indication information to the charging device, the second indication information being used to indicate that the temperature of the power battery is greater than or equal to the temperature threshold.
  • the charging device stops heating the power battery.
  • the BMS can send the first indication information to the charging device multiple times to update the information on the pulse current. Set a temperature threshold. When the power battery is heated to exceed the temperature threshold, the BMS sends second instruction information to the charging device to instruct it to stop heating. The charging device receives the second instruction information and stops charging the power based on the second instruction information. Battery heating.
  • the method further includes: sending third indication information to the charging device, the third indication information being used to instruct the charging device to charge the power battery, the third indication information Includes information on charging voltage and/or charging current.
  • the BMS after heating the power battery to a predetermined temperature, the BMS will send third instruction information to the charging device to instruct it to charge the power battery.
  • the third instruction information may include, for example, charging voltage and/or charging current.
  • the charging device receives the third instruction information and charges the power battery based on the third instruction information. Since the temperature of the power battery has increased at this time, the safety of the power battery is ensured and damage to the power battery is avoided.
  • the method further includes: sending fourth instruction information to the charging device, where the fourth instruction information is used to instruct the charging device to stop charging the power battery.
  • a charging device including: a receiving module configured to receive first indication information sent by the battery management system BMS of the power battery before the charging device charges the power battery.
  • the first indication The information is used to instruct the charging device to heat the power battery; the processing module is used to heat the power battery according to the first instruction information.
  • the first indication information includes information on the amplitude and/or frequency of the pulse current used to heat the power battery.
  • the charging device further includes a bidirectional DC/DC converter
  • the processing module is specifically configured to: control the bidirectional DC/DC converter to form a flow pattern that is discharged from the power battery to the charging device. circuit, and a circuit for charging the power battery by the charging device, so as to heat the power battery during the process of discharging and charging.
  • the charging device further includes an AC/DC converter, and the AC/DC converter and the bidirectional DC/DC converter are connected between the AC power supply and the power battery.
  • the charging device further includes an energy storage battery, and the bidirectional DC/DC converter is connected between the energy storage battery and the power battery.
  • the receiving module is further configured to: receive second instruction information sent by the BMS, the second instruction information being used to instruct the charging device to stop heating the power battery;
  • the processing module is also configured to: stop heating the power battery according to the second instruction information.
  • the receiving module is further configured to receive third instruction information sent by the BMS, where the third instruction information is used to instruct the charging device to charge the power battery.
  • the indication information includes information on charging voltage and/or charging current; the processing module is further configured to charge the power battery according to the third indication information.
  • the receiving module is further configured to: receive fourth instruction information sent by the BMS, the fourth instruction information being used to instruct the charging device to stop charging the power battery; the processing The module is also configured to: stop charging the power battery according to the fourth instruction information.
  • a BMS including: a processing module for obtaining the temperature of the power battery before the charging device charges the power battery; and a sending module for obtaining the temperature of the power battery when the temperature of the power battery is less than a temperature threshold. when, first instruction information is sent to the charging device, where the first instruction information is used to instruct the charging device to heat the power battery.
  • the first indication information includes information on the amplitude and/or frequency of the pulse current used to heat the power battery.
  • the processing module before sending the first indication information to the charging device, is further configured to: determine the corresponding relationship between preset temperatures and amplitudes.
  • the maximum amplitude of the pulse current is an amplitude corresponding to the temperature of the power battery; and/or, according to the preset correspondence between multiple temperatures and multiple frequencies, it is determined that the frequency of the pulse current is equal to The frequency corresponding to the temperature of the power battery.
  • the sending module is further configured to: when the temperature of the power battery is greater than or equal to the temperature threshold, send second indication information to the charging device, and the second indication information is used to Instruct the charging device to stop heating the power battery.
  • the sending module is further configured to: send third instruction information to the charging device, where the third instruction information is used to instruct the charging device to charge the power battery.
  • the indication information includes information on charging voltage and/or charging current.
  • the sending module is further configured to send fourth instruction information to the charging device, where the fourth instruction information is used to instruct the charging device to stop charging the power battery.
  • a battery heating device including a memory and a processor.
  • the memory is used to store instructions.
  • the processor is used to read the instructions and execute the above-mentioned first aspect or aspects based on the instructions.
  • the battery heating method described in any implementation manner.
  • a sixth aspect provides a computer storage medium, including instructions for causing a computer to perform the battery heating method described in the above first aspect or any implementation of the first aspect, or the above second aspect or the third aspect.
  • Figure 1 is a schematic diagram of the application scenario of the battery heating device according to the embodiment of the present application.
  • Figure 2 is a schematic diagram of the application scenario of the battery heating device according to the embodiment of the present application.
  • Figure 3 is a flow interaction diagram of a battery heating method according to an embodiment of the present application.
  • Figure 4 is a flow interaction diagram of a battery heating method according to another embodiment of the present application.
  • FIG. 5 is a schematic block diagram of a charging device according to an embodiment of the present application.
  • FIG. 6 is a schematic block diagram of a BMS according to an embodiment of the present application.
  • FIG. 7 is a schematic block diagram of a charging device according to an embodiment of the present application.
  • Figure 8 is a schematic block diagram of a BMS according to an embodiment of the present application.
  • Figure 9 is a schematic block diagram of a battery heating device according to an embodiment of the present application.
  • Figure 10 is a schematic block diagram of a computer storage medium according to an embodiment of the present application.
  • the power battery in the embodiment of the present application may be a lithium-ion battery, a lithium metal battery, a lead-acid battery, a nickel separator battery, a nickel-metal hydride battery, a lithium-sulfur battery, a lithium-air battery, a sodium-ion battery, etc., which are not limited here.
  • the power battery in the embodiment of the present application can be a single cell, a battery module or a battery pack, which is not limited here.
  • the power battery can be used in power devices such as cars and ships. For example, it can be applied to powered cars to power the motors of powered cars as a power source for electric cars.
  • the power battery can also power other electrical devices in electric vehicles, such as in-car air conditioners and car players.
  • FIG. 1 and FIG. 2 show schematic diagrams of possible application scenarios of embodiments of the present application.
  • the charging device 1 may be a charging pile, and the charging device 1 includes a bidirectional AC/DC converter 30 , a bidirectional DC/DC converter 10 and a controller 20 .
  • the charging device 1 can charge the vehicle 50 through an AC power source 40, such as a power grid.
  • a bidirectional AC/DC converter 30 and a bidirectional DC/DC converter 10 are connected between the AC power supply 40 and the vehicle 50.
  • the bidirectional AC/DC converter 30 can convert the AC power output by the AC power supply 40 into a DC signal.
  • the DC signal The voltage is then converted through the bidirectional DC/DC converter 10 to charge the power battery in the vehicle 50 .
  • the controller 20 is used to control the bidirectional AC/DC converter 30 and the bidirectional DC/DC converter 10, and can communicate with a battery management system (Battery Management System, BMS) in the vehicle 50.
  • BMS Battery Management System
  • the charging device 2 includes an energy storage battery 60 and a bidirectional DC/DC converter 10 .
  • the charging device 2 can charge the vehicle 50 through the energy storage battery 60 .
  • a bidirectional DC/DC converter 10 is connected between the energy storage battery 60 and the vehicle 50 for voltage conversion of the DC signal output by the energy storage battery 60.
  • the charging device 2 may be, for example, a charging station, such as an optical storage charging and inspection smart micro-grid charging station, etc., in which the energy storage battery 60 can draw power from the power grid or photovoltaic panels through an inverter (Power Conversion System, PCS).
  • PCS Power Conversion System
  • the bidirectional AC/DC converter 30 can also be replaced by a unidirectional AC/DC converter, and the bidirectional DC/DC converter 10 can also be used. Replaced with a unidirectional DC/DC converter.
  • the charging device can also be used as a battery heating device to output pulse current to heat the power battery. If the power battery is at a low temperature, charging the power battery at low temperature may cause problems such as lithium precipitation in the battery cell, which may lead to safety issues.
  • a charging device before charging the power battery, can be used to heat the power battery at low temperature, for example, by controlling various switches in a bidirectional AC/DC converter or a bidirectional DC/DC converter.
  • the tube allows the power battery and the charging device to alternately charge and discharge, thereby heating the power battery during the charging and discharging process. Then, the heated power battery is charged through the charging device.
  • FIG. 3 is a schematic flow chart of a battery heating method according to an embodiment of the present application.
  • the method 100 shown in FIG. 3 is executed by the control device and the charging device of the power battery.
  • the charging device may be, for example, the charging device 1 shown in FIG. 1 or the charging device 2 shown in FIG. 2 .
  • the power battery control device is used to manage and control the power battery.
  • it may be the BMS of the power battery or a vehicle controller.
  • the control device is a BMS as an example.
  • the following operations performed by the BMS may also be performed by a vehicle controller or the like.
  • method 100 includes some or all of the following steps. Among them, steps 110 and 120 are executed by the BMS, and steps 130 and 140 are executed by the charging device.
  • step 110 before the charging device charges the power battery, the BMS obtains the temperature of the power battery.
  • step 120 if the temperature of the power battery is less than the temperature threshold, the BMS sends first indication information to the charging device.
  • the first instruction information is used to instruct the charging device to heat the power battery.
  • the charging device receives the first indication information sent by the BMS of the power battery.
  • step 140 the charging device heats the power battery according to the first instruction information.
  • Charging power batteries at low temperatures may cause problems such as lithium precipitation, affecting the safety of power batteries. Therefore, in this embodiment, before charging the power battery, if the temperature of the power battery is low, the BMS will send the first indication information to the charging device to instruct it to heat the power battery, and the charging device receives the first indication information. The power battery is heated based on the first indication information to avoid damage to the power battery caused by low-temperature charging.
  • the method 100 further includes part or all of steps 150 to 170 .
  • step 150 when the temperature of the power battery is greater than or equal to the temperature threshold, the BMS sends second instruction information to the charging device.
  • the second instruction information is used to instruct the charging device to stop heating the power battery.
  • step 160 the charging device receives the second indication information sent by the BMS.
  • the second instruction information is used to instruct the charging device to stop heating the power battery.
  • step 170 the charging device stops heating the power battery according to the second instruction information.
  • the heating of the power battery by the charging device is based on the discharging and charging of the power battery.
  • a pulse current for heating the power battery is formed.
  • the waveform of the pulse current can be Sine wave or similar waveform.
  • the first indication information includes information about the pulse current used to heat the power battery.
  • the first indication information includes information about the amplitude and/or frequency of the pulse current.
  • the information on the amplitude of the pulse current may include the maximum amplitude or the average amplitude of the pulse current, etc.
  • the frequency of the pulse current used to heat different power batteries can be different.
  • the heating effect of high-frequency pulse signals is worse than that of low-frequency pulse signals, but high-frequency pulse signals cause less damage to the battery core.
  • high-frequency pulse signals cause less damage to the battery core.
  • power batteries on different vehicle models have different cell endurance capabilities and different pulse current frequencies required for heating. Therefore, different power batteries may require pulse currents of different frequencies.
  • the BMS can determine the amplitude and/or frequency information of the pulse current used to heat the power battery based on information such as the type of power battery and current temperature, and carry this information of the pulse current in the first indication information, thereby The charging device heats the power battery based on appropriate pulse current to improve heating performance.
  • the BMS can also consider factors such as the battery state of health (State of Health, SOH) when determining the amplitude and/or frequency information of the pulse current.
  • SOH battery state of health
  • the information about the pulse current used to heat the power battery can be adjusted accordingly based on the rise in the temperature of the power battery.
  • the BMS can obtain the temperature of the power battery at a certain time interval and adjust the information based on the temperature of the power battery. The temperature changes, the pulse current information is updated, and when the pulse current information needs to be updated, the first instruction information carrying the updated pulse current information is sent to the charging device.
  • a temperature threshold can be set. After the power battery and the charging device establish a physical connection and the handshake is successful, if the temperature of the power battery is less than the temperature threshold, the BMS sends the first indication information to the charging device, and the charging device receives the first indication information and The power battery is heated based on the first indication information. During the heating process, the BMS can obtain the temperature of the power battery at certain time intervals until the temperature of the power battery rises to greater than or equal to the temperature threshold. The BMS sends the second indication information to the charging device, and the charging device receives the second indication information and Stop heating the power battery based on the second instruction information.
  • the method 100 before the BMS sends the first instruction information to the charging device, the method 100 further includes: the BMS determines the maximum amplitude of the pulse current according to the preset correspondence between multiple temperatures and multiple amplitudes. is the amplitude corresponding to the temperature of the power battery; and/or, based on the preset correspondence between multiple temperatures and multiple frequencies, determine the frequency of the pulse current to be the frequency corresponding to the temperature of the power battery.
  • the BMS can determine the maximum amplitude and/or frequency of the pulse current corresponding to the current temperature through table lookup and other methods, making the implementation simple and accurate.
  • the BMS first detects the temperature of the power battery to avoid charging the power battery at low temperatures. For example, BMS can obtain the temperature of the power battery at fixed time intervals. If the detected temperature of the power battery is between T1 and T2, the BMS queries Table 1 and selects frequency F1 as the frequency of the pulse current for heating the power battery, and carries the information of frequency F1 in the first indication information. , after receiving the first indication information, the charging device provides a pulse current with a frequency of F1 to the power battery; after this time interval, the temperature of the power battery is obtained.
  • the BMS looks up Table 1 and selects frequency F2 as the frequency of the pulse current for heating the power battery, and carries the information of frequency F2 in the first indication information. After the charging device receives the first indication information, Provide a pulse current with a frequency of F2 to the power battery; in sequence, until the temperature of the power battery is heated to greater than Tn, the BMS sends the second instruction information to the charging device. When the charging device receives the second instruction information, it will The second instruction message stops heating the power battery.
  • the BMS sends first instruction information to the charging device.
  • the first instruction information can be used to instruct the charging device to charge the power battery, and the first instruction information carries the information of the power battery. Temperature information.
  • the charging device determines whether the power battery needs to be heated according to the temperature of the power battery. For example, if the charging device determines that the temperature of the power battery is less than the temperature threshold, the charging device first heats the power battery before charging the power battery.
  • the BMS can also send the temperature of the power battery to the charging device, and the charging device determines the maximum amplitude of the pulse current corresponding to the current temperature based on the current temperature of the power battery through the above table lookup or other methods. and/or frequency information.
  • the method 100 may further include steps 181 to 183 .
  • step 181 the BMS sends third indication information to the charging device.
  • the third instruction information is used to instruct the charging device to charge the power battery.
  • the third indication information may include, for example, charging parameters, such as charging voltage and/or charging current information.
  • step 182 the charging device receives the third indication information sent by the BMS.
  • step 183 the charging device charges the power battery according to the third instruction information.
  • the BMS After heating the power battery to a predetermined temperature, the BMS will send third instruction information to the charging device to instruct it to charge the power battery.
  • the charging device receives the third instruction information and charges the power battery based on the third instruction information. Since the temperature of the power battery has increased at this time, damage to the power battery caused by low-temperature charging is avoided and the safety of the power battery is ensured.
  • the BMS may not send the first indication information to the charging device, but send the third indication information to the charging device.
  • the charging device receives the third instruction information and charges the power battery according to the third instruction information.
  • the method 100 further includes steps 191 to 193 .
  • step 191 the BMS sends fourth instruction information to the charging device.
  • the fourth instruction information is used to instruct the charging device to stop charging the power battery.
  • step 192 the charging device receives the fourth instruction information sent by the BMS.
  • the fourth instruction information is used to instruct the charging device to stop charging the power battery.
  • step 193 the charging device stops charging the power battery according to the fourth instruction information.
  • the BMS instructs the charging device to stop charging the power battery by sending the fourth instruction information to the charging device.
  • Figure 5 shows a possible specific implementation of the above-mentioned battery heating method 100. As shown in Figure 5, the process of heating and charging the power battery may include some or all of the following steps.
  • step 101 a physical connection is established between the power battery and the charging device.
  • step 102 the low voltage auxiliary power supply is powered on.
  • step 103 a handshake is performed between the BMS and the charging device, such as the controller 20, to establish a communication connection.
  • steps 101 to 103 and steps 111 to 113 for example, you can refer to the details of the charging process in the GB/T 27930-2015 standard.
  • Steps 104 to 110 in the dotted box are a possible specific implementation of the above-mentioned battery heating method 100, and steps 104 to 110 are content that needs to be newly added to the existing standards.
  • step 104 the BMS obtains the temperature T of the power battery and compares the temperature T with the temperature threshold T0.
  • T ⁇ T0 execute steps 105 to 110, and the charging device heats the power battery; otherwise, if T ⁇ T0, execute steps 111 to 113 directly, and the charging device charges the power battery.
  • step 105 the BMS determines the maximum amplitude and frequency of the pulse current used to heat the power battery.
  • the BMS can determine the maximum amplitude and/or frequency of the pulse current that matches the power battery by looking up a table.
  • step 106 the BMS sends the first indication information to the charging device.
  • the first indication information may carry information about the maximum amplitude and frequency of the pulse current.
  • step 107 the charging device receives the first indication information and heats the power battery based on the first indication information.
  • the amplitude and frequency of the pulse current during the heating process of the power battery can be determined based on the information about the maximum amplitude and frequency of the pulse current carried in the first indication information.
  • step 108 during the heating process, the BMS compares T with the temperature threshold T0.
  • steps 105 to 107 are repeatedly executed, and the charging device heats the power battery; otherwise, if T ⁇ T0, steps 109 and 110 are executed.
  • step 109 the BMS sends the second indication information to the charging device.
  • step 110 the charging device receives the second instruction information and stops heating the power battery based on the second instruction information.
  • steps 111 to 113 are performed.
  • step 111 charging parameters are configured.
  • the BMS can send information about charging parameters such as charging voltage and charging current to the charging device.
  • step 112 the charging device charges the power battery based on the charging parameters.
  • step 113 charging ends.
  • the BMS of the power battery determines the current temperature of the power battery, and first heats the power battery when the temperature is low. Charging it after the temperature rises can avoid damage to the power battery caused by low-temperature charging and improve the safety of the power battery.
  • the charging device may include a bidirectional DC/DC converter.
  • heating the power battery according to the first instruction information includes: controlling the bidirectional DC/DC converter to form a circuit for discharging from the power battery to the charging device and a circuit for charging the power battery from the charging device. , to heat the power battery during the discharge and charging process.
  • the bidirectional DC/DC converter includes multiple switching tubes. By controlling each switching tube in the bidirectional DC/DC converter to charge and discharge alternately between the power battery and the charging device, the power can be charged and discharged during the process. The battery is heated.
  • Figure 6 takes a DC/DC converter with a Dual Active Bridge (DAB) architecture as an example.
  • the switching tube is controlled according to the timing sequence, which can alternately form a circuit for discharging from the power battery to the charging device, and from the charging device. A circuit that charges the power battery, thereby heating the power battery during the process of discharging and charging.
  • DC/DC converters with LLC, CLLC, CF-DAB, Partial-Power Converter and other architectures can also be used.
  • Each bridge arm in the bidirectional DC/DC converter 10 includes two switch tubes connected in series, which are the bridge formed by the switch tube Q1 and the switch tube Q2 respectively. arm, a bridge arm formed by switch tubes Q3 and switch tubes Q4, a bridge arm formed by switch tubes Q5 and switch tubes Q6, and a bridge arm formed by switch tubes Q7 and switch tubes Q8.
  • the upper and lower switching tubes of each bridge arm are 180° complementary conduction, and the diagonal switching tubes are conductive at the same time.
  • the switching period is T
  • the switching frequency fs 1/T
  • V 1 and V 2 are the input voltage and output voltage, where the V 1 side is the side connected to the AC/DC converter or energy storage battery, and the V 2 side is connected One side of the power battery.
  • V AB is the voltage between point A and point B in Figure 6
  • V CD is the voltage between point C and point D in Figure 6.
  • i L is the inductor current
  • v L is the inductor voltage.
  • the transmission power of the bidirectional DC/DC converter 10 is controlled by controlling the angle between V AB and V CD , that is, the phase shift angle.
  • the ratio of the phase shift angle to ⁇ is the phase shift duty cycle D ⁇ >0.
  • switch tube Q 2 and switch tube Q 3 In a switching cycle, for switching state 1 (before time t0), before time t0, switch tube Q 2 and switch tube Q 3 , switch tube Q 6 and switch tube Q 7 are turned on, and the inductor current i L is negative, The current passes through the switching tubes Q 2 and Q 3 , switching tubes Q 6 and Q 7 , and the power flows from the V 1 side to the V 2 side.
  • the switching tube Q1 and the switching tube Q4 are turned on. Since the anti-parallel diodes D1 and D4 of the switching tube Q1 and the switching tube Q4 at time t1 conduct Turn on, so the voltage at both ends of switch tube Q1 and switch tube Q4 is zero when they are turned on, achieving zero-voltage turn-on.
  • the inductor current i L is negative, the V 1 side absorbs power, and the V 2 side absorbs power. The energy stored in the inductor is transmitted to the V 1 side and V 2 side, and there is a power backflow phenomenon on the V 1 side.
  • switching state 4 (from time t2 to time t3), starting from time t2, due to the action of power supply V 1 , the inductor current begins to become positive and flows through switch tube Q 1 and switch tube Q 4 , switch tube Q 6 and switch tube Q 7 , in switching state 4, the V 1 side and the V 2 side store energy in the inductor at the same time, because the power flows from the V 2 side to the inductor, and there is a power backflow phenomenon on the V 2 side.
  • switching tube Q 6 and switching tube Q 7 are disconnected, and the current charges capacitors C 6 and C 7 while capacitors C 5 and C 8 discharge.
  • the voltage across the capacitors C 6 and C 7 reaches V 2
  • the voltage across the capacitors C 5 and C 8 is zero, and the anti-parallel diodes D 5 and D 8 naturally conduct.
  • the switching tube Q 5 and the switching tube Q 8 are turned on, because at this time the anti-parallel diodes D 5 and D 8 of the switching tube Q 5 and the switching tube Q 8 are conducting Pass, so the voltage at both ends of D 5 and D 8 is zero when they are turned on, achieving zero-voltage conduction.
  • the V1 side emits power and the V2 side absorbs power.
  • the power battery can be heated during the alternating process of charging and discharging.
  • the charging device may also include an AC/DC converter, such as the bidirectional AC/DC converter 30 shown in FIG. 1 .
  • AC/DC converters and bidirectional DC/DC converters are connected between the AC power supply and the power battery.
  • the charging device may also include an energy storage battery, such as the energy storage battery 60 shown in FIG. 2 .
  • the bidirectional DC/DC converter is connected between the energy storage battery and the power battery.
  • the charging device 200 includes:
  • the receiving module 210 is configured to receive the first instruction information sent by the battery management system BMS of the power battery before the charging device 200 charges the power battery.
  • the first instruction information is used to instruct the charging device 200 to heat the power battery;
  • the processing module 220 is used to heat the power battery according to the first instruction information.
  • the first indication information includes information on the amplitude and/or frequency of the pulse current used to heat the power battery.
  • the charging device 200 also includes a bidirectional DC/DC converter, and the processing module 220 is specifically configured to: control the bidirectional DC/DC converter to form a circuit for discharging from the power battery to the charging device 200, and use the charging device 200 to A circuit for charging the power battery to heat the power battery during the process of discharging and charging.
  • the charging device 200 further includes an AC/DC converter, and the AC/DC converter and the bidirectional DC/DC converter are connected between the AC power supply and the power battery.
  • the charging device 200 further includes an energy storage battery, and a bidirectional DC/DC converter is connected between the energy storage battery and the power battery.
  • the receiving module 210 is also configured to: receive the second instruction information sent by the BMS, the second instruction information is used to instruct the charging device 200 to stop heating the power battery; the processing module 220 is also configured to: according to the first 2. Instruction message: Stop heating the power battery.
  • the receiving module 210 is further configured to receive third indication information sent by the BMS.
  • the third indication information is used to instruct the charging device 200 to charge the power battery.
  • the third indication information includes the charging voltage and/or or charging current information; the processing module 220 is also used to: charge the power battery according to the third instruction information.
  • the receiving module 210 is also configured to: receive the fourth instruction information sent by the BMS, the fourth instruction information is used to instruct the charging device 200 to stop charging the power battery; the processing module 220 is also configured to: according to the fourth Instruction message to stop charging the power battery.
  • BMS 300 includes:
  • the processing module 310 is used to obtain the temperature of the power battery before the charging device charges the power battery;
  • the sending module 320 is configured to send first instruction information to the charging device when the temperature of the power battery is less than the temperature threshold.
  • the first instruction information is used to instruct the charging device to heat the power battery.
  • the first indication information includes information on the amplitude and/or frequency of the pulse current used to heat the power battery.
  • the processing module 310 before sending the first indication information to the charging device, is further configured to: determine the maximum amplitude of the pulse current based on preset correspondences between multiple temperatures and multiple amplitudes. is the amplitude corresponding to the temperature of the power battery; and/or, based on the preset correspondence between multiple temperatures and multiple frequencies, determine the frequency of the pulse current to be the frequency corresponding to the temperature of the power battery.
  • the sending module 320 is further configured to: when the temperature of the power battery is greater than or equal to the temperature threshold, send second instruction information to the charging device, where the second instruction information is used to instruct the charging device to stop processing the power battery. heating.
  • the sending module 320 is further configured to: send third indication information to the charging device.
  • the third indication information is used to instruct the charging device to charge the power battery.
  • the third indication information includes the charging voltage and/or the charging voltage. current information.
  • the sending module 320 is further configured to send fourth instruction information to the charging device, where the fourth instruction information is used to instruct the charging device to stop charging the power battery.
  • FIG. 9 shows a schematic block diagram of a battery heating device according to another embodiment of the present application.
  • the battery heating 400 includes a memory 410 and a processor 420.
  • the memory 410 is used to store instructions
  • the processor 420 is used to read the instructions and execute the battery in various embodiments of the present application based on the instructions. Operations performed by the charging device or the control device of the power battery in the heating method 100 .
  • Figure 10 shows a schematic block diagram of a computer storage medium according to another embodiment of the present application.
  • the computer storage medium 500 includes instructions 510 , which are used to cause the computer to perform the operations performed by the charging device or the control device of the power battery in the battery heating method 100 in various embodiments of the present application.
  • This application also provides a power device, which includes a power battery and the charging device in any of the above embodiments.
  • the charging device is connected to the power battery and is used to heat the power battery before charging the power battery.
  • the power device may be, for example, a powered vehicle or the like.
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented.
  • the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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Abstract

本申请实施例提供一种电池加热的方法、充电装置和电池管理系统，能够有效地对动力电池进行加热。所述方法由充电装置执行，包括：在所述充电装置对动力电池充电之前，从所述动力电池的控制装置接收第一指示信息，所述第一指示信息用于指示所述充电装置对所述动力电池进行加热；根据所述第一指示信息，对所述动力电池进行加热。

Description

电池加热的方法、充电装置和电池管理系统 技术领域
本申请涉及电池技术领域，特别是涉及一种电池加热的方法、充电装置和电池管理系统。
背景技术
由于具有能量密度高、可循环充电、安全环保等优点，动力电池被广泛应用于新能源汽车、消费电子、储能系统等领域中。
但是低温环境下动力电池的使用会受到一定限制，例如，动力电池在低温环境下的放电容量会严重衰退，以及电池在低温环境下无法充电。为了能够正常使用动力电池，需要在低温环境下为动力电池进行加热。如何有效地对动力电池进行加热，成为亟待解决的问题。
发明内容
本申请提供一种电池加热的方法、充电装置和电池管理系统，能够有效地对动力电池进行加热。
第一方面，提供一种电池加热的方法，由充电装置执行，所述方法包括：在所述充电装置对动力电池充电之前，从所述动力电池的控制装置接收第一指示信息，所述第一指示信息用于指示所述充电装置对所述动力电池进行加热；根据所述第一指示信息，对所述动力电池进行加热。
低温下对动力电池进行充电可能导致析锂等问题，影响动力电池的安全性。在本申请实施例中，在对动力电池进行充电之前，如果动力电池的温度较低，动力电池的控制装置会向充电装置发送第一指示信息，以指示其对动力电池进行加热，充电装置接收第一指示信息并基于第一指示信息对动力电池进行加热，从而避免低温充电对动力电池造成的损伤。
在一种实现方式中，所述第一指示信息中包括用于对所述动力电池进行加热的 脉冲电流的幅值和/或频率的信息。
对不同的动力电池进行加热时所采用的脉冲电流的频率可以不同，动力电池的控制装置可以确定用于对动力电池进行加热的脉冲电流的幅值和/或频率的信息，并将脉冲电流的这些信息携带于第一指示信息中，从而使充电装置基于合适的脉冲电流对动力电池进行加热，以提高加热性能。
在一种实现方式中，所述充电装置包括双向DC/DC转换器，所述根据所述第一指示信息，对所述动力电池进行加热，包括：控制所述双向DC/DC转换器形成由所述动力电池向所述充电装置放电的回路、以及由所述充电装置向所述动力电池充电的回路，以在放电和充电的过程中对所述动力电池进行加热。
双向DC/DC转换器中包括多个开关管，在该实施例中，可以通过控制双向DC/DC转换器中的各个开关管，使动力电池和充电装置之间交替进行充放电，从而在充放电的过程中对动力电池进行加热。
在一种实现方式中，所述充电装置还包括AC/DC转换器，所述AC/DC转换器和所述双向DC/DC转换器连接在交流电源与所述动力电池之间。
在一种实现方式中，所述充电装置还包括储能电池，所述双向DC/DC转换器连接在所述储能电池与所述动力电池之间。
在一种实现方式中，所述方法还包括：从所述控制装置接收第二指示信息，所述第二指示信息用于指示所述充电装置停止对所述动力电池进行加热；根据所述第二指示信息，停止对所述动力电池进行加热。
在一种实现方式中，所述方法还包括：从所述控制装置接收第三指示信息，所述第三指示信息用于指示所述充电装置对所述动力电池充电，所述第三指示信息中包括充电电压和/或充电电流的信息；根据所述第三指示信息，对所述动力电池充电。
该实施例中，在对动力电池加热至预定温度后，动力电池的控制装置会向充电装置发送第三指示信息，以指示其对动力电池充电，充电装置接收第三指示信息并基于第三指示信息对动力电池充电。由于此时动力电池的温度已经升高，避免了低温充电对动力电池的损伤，保证了动力电池的安全性。
在一种实现方式中，所述方法还包括：从所述控制装置接收第四指示信息，所述第四指示信息用于指示所述充电装置停止对所述动力电池充电；根据所述第四指示信息，停止对所述动力电池充电。
第二方面，提供一种电池加热的方法，由动力电池的电池管理系统BMS执行，所述方法包括：在充电装置对所述动力电池充电之前，获取所述动力电池的温度；若所述动力电池的温度小于温度阈值，向所述充电装置发送第一指示信息，所述第一指示信息用于指示所述充电装置对所述动力电池进行加热。
低温下对动力电池进行充电可能导致析锂等问题，影响动力电池的安全性。在本申请实施例中，在对动力电池进行充电之前，如果动力电池的温度较低，BMS会向充电装置发送第一指示信息，以指示其对动力电池进行加热，充电装置接收第一指示信息并基于第一指示信息对动力电池进行加热，从而避免低温充电对动力电池造成的损伤。
在一种实现方式中，所述第一指示信息中包括用于对所述动力电池进行加热的脉冲电流的幅值和/或频率的信息。
对不同的动力电池进行加热时所采用的脉冲电流的频率可以不同，BMS可以确定用于对动力电池进行加热的脉冲电流的幅值和/或频率的信息，并将脉冲电流的信息携带于第一指示信息中，从而使充电装置基于合适的脉冲电流对动力电池进行加热，以提高加热性能。
在一种实现方式中，在所述向所述充电装置发送第一指示信息之前，所述方法还包括：根据预设的多个温度与多个幅值之间的对应关系，确定所述脉冲电流的最大幅值为与所述动力电池的温度对应的幅值；和/或，根据预设的多个温度与多个频率之间的对应关系，确定所述脉冲电流的频率为与所述动力电池的温度对应的频率。
BMS可以基于动力电池当前的温度，通过查表等方式确定与当前温度对应的脉冲电流的最大幅值和/或频率等信息，实现简单且准确。
在一种实现方式中，所述方法还包括：在所述动力电池的温度大于或等于所述温度阈值时，向所述充电装置发送第二指示信息，所述第二指示信息用于指示所述充电装置停止对所述动力电池进行加热。
在加热过程中脉冲电流的频率和/或最大幅值等信息可以基于动力电池温度的上升而进行相应的调整，BMS可以向充电装置多次发送第一指示信息以更新脉冲电流的这些信息。设定一温度阈值，当动力电池被加热至超过该温度阈值时，BMS向充电装置发送第二指示信息，以指示其停止加热，充电装置接收第二指示信息并基于第二指示信息停止对动力电池的加热。
在一种实现方式中，所述方法还包括：向所述充电装置发送第三指示信息，所述第三指示信息用于指示所述充电装置对所述动力电池充电，所述第三指示信息包括充电电压和/或充电电流的信息。
该实施例中，在对动力电池加热至预定温度后，BMS会向充电装置发送第三指示信息，以指示其对动力电池充电，该第三指示信息中例如可以包括充电电压和/或充电电流的信息，充电装置接收第三指示信息并基于第三指示信息对动力电池充电。由于此时动力电池的温度已经升高，保证了动力电池的安全性，避免了对动力电池的损伤。
在一种实现方式中，所述方法还包括：向所述充电装置发送第四指示信息，所述第四指示信息用于指示所述充电装置停止对所述动力电池充电。
第三方面，提供一种充电装置，包括：接收模块，用于在所述充电装置对动力电池充电之前，接收所述动力电池的电池管理系统BMS发送的第一指示信息，所述第一指示信息用于指示所述充电装置对所述动力电池进行加热；处理模块，用于根据所述第一指示信息，对所述动力电池进行加热。
在一种实现方式中，所述第一指示信息中包括用于对所述动力电池进行加热的脉冲电流的幅值和/或频率的信息。
在一种实现方式中，所述充电装置还包括双向DC/DC转换器，所述处理模块具体用于：控制所述双向DC/DC转换器形成由所述动力电池向所述充电装置放电的回路、以及由所述充电装置向所述动力电池充电的回路，以在放电和充电的过程中对所述动力电池进行加热。
在一种实现方式中，所述充电装置还包括AC/DC转换器，所述AC/DC转换器和所述双向DC/DC转换器连接在交流电源与所述动力电池之间。
在一种实现方式中，所述充电装置还包括储能电池，所述双向DC/DC转换器连接在所述储能电池与所述动力电池之间。
在一种实现方式中，所述接收模块还用于：接收所述BMS发送的第二指示信息，所述第二指示信息用于指示所述充电装置停止对所述动力电池进行加热；所述处理模块还用于：根据所述第二指示信息，停止对所述动力电池进行加热。
在一种实现方式中，所述接收模块还用于：接收所述BMS发送的第三指示信息，所述第三指示信息用于指示所述充电装置对所述动力电池充电，所述第三指示信 息中包括充电电压和/或充电电流的信息；所述处理模块还用于：根据所述第三指示信息，对所述动力电池充电。
在一种实现方式中，所述接收模块还用于：接收所述BMS发送的第四指示信息，所述第四指示信息用于指示所述充电装置停止对所述动力电池充电；所述处理模块还用于：根据所述第四指示信息，停止对所述动力电池充电。
第四方面，提供一种BMS，包括：处理模块，用于在充电装置对所述动力电池充电之前，获取所述动力电池的温度；发送模块，用于在所述动力电池的温度小于温度阈值时，向所述充电装置发送第一指示信息，所述第一指示信息用于指示所述充电装置对所述动力电池进行加热。
在一种实现方式中，所述第一指示信息中包括用于对所述动力电池进行加热的脉冲电流的幅值和/或频率的信息。
在一种实现方式中，在所述向所述充电装置发送第一指示信息之前，所述处理模块还用于：根据预设的多个温度与多个幅值之间的对应关系，确定所述脉冲电流的最大幅值为与所述动力电池的温度对应的幅值；和/或，根据预设的多个温度与多个频率之间的对应关系，确定所述脉冲电流的频率为与所述动力电池的温度对应的频率。
在一种实现方式中，所述发送模块还用于：在所述动力电池的温度大于或等于所述温度阈值时，向所述充电装置发送第二指示信息，所述第二指示信息用于指示所述充电装置停止对所述动力电池进行加热。
在一种实现方式中，所述发送模块还用于：向所述充电装置发送第三指示信息，所述第三指示信息用于指示所述充电装置对所述动力电池充电，所述第三指示信息包括充电电压和/或充电电流的信息。
在一种实现方式中，述发送模块还用于：向所述充电装置发送第四指示信息，所述第四指示信息用于指示所述充电装置停止对所述动力电池充电。
第五方面，提供一种电池加热装置，包括存储器和处理器，所述存储器用于存储指令，所述处理器用于读取所述指令，并基于所述指令执行上述第一方面或第一方面的任意实现方式中所述的电池加热的方法。
第六方面，提供一种计算机存储介质，包括指令，所述指令用于使计算机执行上述第一方面或第一方面的任意实现方式中所述的电池加热的方法、或者上述第二方面或第二方面的任意实现方式中所述的电池加热的方法。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例中所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据附图获得其他的附图。
图1是是本申请实施例的电池加热装置的应用场景的示意图。
图2是本申请实施例的电池加热装置的应用场景的示意图。
图3是本申请实施例的电池加热的方法的流程交互图。
图4是本申请另一实施例的电池加热的方法的流程交互图。
图5是本申请实施例的充电装置的示意性框图。
图6是本申请实施例的BMS的示意性框图。
图7是本申请实施例的充电装置的示意性框图。
图8是本申请实施例的BMS的示意性框图。
图9是本申请实施例的电池加热装置的示意性框图。
图10是本申请实施例的计算机存储介质的示意性框图。
在附图中，附图并未按照实际的比例绘制。
具体实施方式
下面结合附图和实施例对本申请的实施方式作进一步详细描述。以下实施例的详细描述和附图用于示例性地说明本申请的原理，但不能用来限制本申请的范围，即本申请不限于所描述的实施例。
在本申请的描述中，需要说明的是，除非另有说明，“多个”的含义是两个以上；术语“上”、“下”、“左”、“右”、“内”、“外”等指示的方位或位置关系仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”、“第三”等仅用于描述目的，而不能理解为指示或暗示相对重要性。“垂直”并不是严格意义上的垂直，而是在误差允许范围之内。“平行”并不是严格意义上的平行，而是在误差允许范围之内。
下述描述中出现的方位词均为图中示出的方向，并不是对本申请的具体结构进行限定。在本申请的描述中，还需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可视具体情况理解上述术语在本申请中的具体含义。
随着时代的发展，新能源汽车由于其环保性、低嗓音、使用成本低等优点，具有巨大的市场前景且能够有效促进节能减排，有利于社会的发展和进步。
由于动力电池的电化学特性，在低温环境下，动力电池的充放电能力被大大限制，严重影响客户冬季用车体验。因此，为了能够正常使用动力电池，需要在低温环境下为动力电池进行加热。
本申请实施例中的动力电池可以为锂离子电池、锂金属电池、铅酸电池、镍隔电池、镍氢电池、锂硫电池、锂空气电池或者钠离子电池等，在此不做限定。从规模而言，本申请实施例中的动力电池可以为电芯单体，也可以是电池模组或电池包，在此不做限定。从应用场景而言，该动力电池可应用于汽车、轮船等动力装置内。例如，可以应用于动力汽车，以为动力汽车的电机供电，作为电动汽车的动力源。该动力电池还可为电动汽车中的其他用电器件供电，比如车内空调、车载播放器等供电。
为了便于描述，以下将以动力电池应用于新能源汽车(即动力汽车、或称电动汽车)为例，对本申请的方案进行阐述。
通常，可以利用交流电源或者储能电池为动力电池充电。作为示例，图1和图2示出了本申请实施例的可能的应用场景的示意图。例如，如图1所示，充电装置1例如可以是充电桩，充电装置1包括双向AC/DC转换器30、双向DC/DC转换器10和控制器20。充电装置1可以通过交流电源40，例如电网，对车辆50进行充电。其中，交流电源40与车辆50之间连接有双向AC/DC转换器30和双向DC/DC转换器10，双向AC/DC转换器30可以将交流电源40输出的交流电转换为直流信号，直流信号再经过双向DC/DC转换器10进行电压转换，从而对车辆50中的动力电池进行充电。控制器20用于对双向AC/DC转换器30和双向DC/DC转换器10进行控制，并能够与车辆50中的电池管理系统(Battery Management System，BMS)之间进行通信。
又例如，如图2所示，充电装置2包括储能电池60和双向DC/DC转换器10。充电装置2可以通过储能电池60对车辆50进行充电。其中，储能电池60与车辆50之 间连接有双向DC/DC转换器10，用于对储能电池60输出的直流信号进行电压转换。充电装置2例如可以是充电站，比如光储充检智能微网充电站等，其中，储能电池60可以通过逆变器(Power Conversion System，PCS)从电网或者光伏板等处取电。
应理解，在一些情况下，例如充电装置仅用于对动力电池充电的情况下，双向AC/DC转换器30也可以替换为单向AC/DC转换器，双向DC/DC转换器10也可以替换为单向DC/DC转换器。
充电装置除了输出直流电流对动力电池充电，还可以作为电池加热装置，输出脉冲电流用来对动力电池进行加热。如果动力电池处于低温状态，低温下对动力电池充电可能会引起电芯析锂等问题，进而引起安全问题。
为此，本申请实施例提出，在对动力电池充电之前，可以利用充电装置对低温下的动力电池进行加热，例如可以通过控制双向AC/DC转换器或者双向DC/DC转换器中的各个开关管，使动力电池和充电装置之间交替进行充放电，从而在充放电的过程中对动力电池进行加热。然后，再通过充电装置对加热后的动力电池进行充电。
图3是本申请实施例的电池加热的方法的示意性流程图。图3所示的方法100由动力电池的控制装置和充电装置执行。充电装置例如可以是图1中所示的充电装置1或者图2所示的充电装置2。动力电池的控制装置用于对动力电池进行管理和控制，例如可以是动力电池的BMS或者车辆控制器等。以下，均以该控制装置为BMS为例进行说明，以下由BMS执行的操作也可以替换为由车辆控制器等执行。
如图3所示，方法100包括以下步骤中的部分或全部。其中，步骤110和步骤120由BMS执行，步骤130和步骤140由充电装置执行。
在步骤110中，在充电装置对动力电池充电之前，BMS获取动力电池的温度。
在步骤120中，若动力电池的温度小于温度阈值，BMS向充电装置发送第一指示信息。
其中，该第一指示信息用于指示充电装置对动力电池进行加热。
在步骤130中，在对动力电池充电之前，充电装置接收动力电池的BMS发送的该第一指示信息。
在步骤140中，充电装置根据该第一指示信息，对动力电池进行加热。
由于低温下对动力电池进行充电可能导致析锂等问题，影响动力电池的安全性。因此，该实施例中，在对动力电池进行充电之前，如果动力电池的温度较低， BMS会向充电装置发送第一指示信息，以指示其对动力电池进行加热，充电装置接收第一指示信息并基于第一指示信息对动力电池进行加热，从而避免低温充电对动力电池造成的损伤。
在一种实现方式中，如图3所示，方法100还包括步骤150至骤170中的部分或全部。
在步骤150中，在动力电池的温度大于或等于温度阈值时，BMS向充电装置发送第二指示信息，第二指示信息用于指示充电装置停止对动力电池进行加热。
在步骤160中，充电装置接收BMS发送的第二指示信息。
其中，该第二指示信息用于指示充电装置停止对动力电池进行加热。
在步骤170中，充电装置根据该第二指示信息，停止对动力电池进行加热。
其中，充电装置对动力电池的加热，是基于对动力电池的放电和充电，在放电过程和充电过程的交替形成了用于对动力电池进行加热的脉冲电流，例如，该脉冲电流的波形可以是正弦波或其相似波形。
在一种实现方式中，该第一指示信息中包括用于对动力电池进行加热的脉冲电流的信息，例如，该第一指示信息中包括脉冲电流的幅值和/或频率的信息。这里，该该脉冲电流的幅值的信息可以包括该脉冲电流的最大幅值或者平均幅值等。
对不同的动力电池进行加热时所采用的脉冲电流的频率可以不同。通常，高频脉冲信号的加热效果比低频脉冲信号的加热效果差，但是高频脉冲信号对电芯的损害较小。例如，动力电池的温度较低时，只能采用高频的脉冲电流对动力电池进行加热；动力电池的温度较高时，可以采用低频或者高频的脉冲电流对动力电池进行加热。又例如，对于不同车型上的动力电池，其电芯的承受能力不同，加热时所需要的脉冲电流的频率也不同，因此针对不同的动力电池可能需要不同频率的脉冲电流。
BMS可以根据动力电池的类型和当前温度等信息，确定用于对动力电池进行加热的脉冲电流的幅值和/或频率的信息，并将脉冲电流的这些信息携带于第一指示信息中，从而使充电装置基于合适的脉冲电流对动力电池进行加热，以提高加热性能。此外，可选地，BMS在确定脉冲电流的幅值和/或频率的信息时，也可以同时考虑电池健康状态(State of Health，SOH)等因素。
在加热过程中，用于对动力电池进行加热的脉冲电流的信息，可以基于动力电池温度的上升而进行相应的调整，BMS例如可以按照一定的时间间隔获取动力电池的 温度，并基于动力电池的温度变化，更新脉冲电流的信息，并在需要更新脉冲电流信息时，向充电装置发送携带更新后的脉冲电流信息的第一指示信息。
可以设定一温度阈值，在动力电池与充电装置建立物理连接并握手成功后，如果动力电池的温度小于该温度阈值，则BMS向充电装置发送第一指示信息，充电装置接收第一指示信息并基于第一指示信息对动力电池进行加热。在加热过程中，BMS可以按照一定的时间间隔获取动力电池的温度，直至动力电池的温度上升至大于或等于该温度阈值，BMS向充电装置发送第二指示信息，充电装置接收第二指示信息并基于第二指示信息停止对动力电池的加热。
在一种实现方式中，BMS在向充电装置发送第一指示信息之前，方法100还包括：BMS根据预设的多个温度与多个幅值之间的对应关系，确定脉冲电流的最大幅值为与动力电池的温度对应的幅值；和/或，根据预设的多个温度与多个频率之间的对应关系，确定脉冲电流的频率为与动力电池的温度对应的频率。
BMS可以基于动力电池当前的温度，通过查表等方式确定与当前温度对应的脉冲电流的最大幅值和/或频率等信息，实现简单且准确。
举例来说，以动力电池温度对脉冲电流频率的影响为例，假设动力电池的温度与脉冲电流的频率之间的对应关系如表一所示。在实际应用中，对于不同类型的动力电池，其查询的表格可以不同。假设温度阈值为T0，T1＜T2＜T3＜…＜Tn≤T0。
表一
温度 [T1，T2] [T2，T3] [T3，T4] … [Tn-1，Tn]
频率 F1 F2 F3 … Fn
如表一所示，在动力电池与充电装置建立物理连接并握手成功后，BMS首先检测动力电池的温度，避免低温下对动力电池的充电。例如，BMS可以按照固定的时间间隔，获取动力电池的温度。如果检测到的动力电池的温度在T1至T2之间，则BMS查询表一，并选择频率F1作为对该动力电池进行加热的脉冲电流的频率，并且在第一指示信息中携带频率F1的信息，充电装置接收到该第一指示信息后，向动力电池提供频率为F1的脉冲电流；在经过该时间间隔后，获动力电池的温度，如果检测到的动力电池的温度上升至在T2至T3之间，则BMS查询表一，并选择频率F2作为对该动力电池进行加热的脉冲电流的频率，并且在第一指示信息中携带频率F2的信息，充电装置接收到该第一指示信息后，向动力电池提供频率为F2的脉冲电流；依次，直至当动 力电池的温度被加热至大于Tn时，BMS向充电装置发送第二指示信息，充电装置在接收到该第二指示信息时，根据该第二指示信息停止对动力电池加热。
应理解，本申请实施例中，可选地，BMS向充电装置发送第一指示信息，该第一指示信息可以用于指示充电装置对动力电池进行充电，并且第一指示信息中携带动力电池的温度的信息。充电装置接收BMS发送的该第一指示信息后，根据动力电池的温度确定是否需要对动力电池进行加热。例如，如果充电装置确定动力电池的温度小于该温度阈值，则充电装置在对动力电池进行充电之前，先对动力电池进行加热。
进一步地，可选地，也可以由BMS向充电装置发送动力电池的温度，并且由充电装置基于动力电池当前的温度，通过上述的查表等方式确定与当前温度对应的脉冲电流的最大幅值和/或频率等信息。
在一种实现方式中，如图4所示，方法100还可以包括步骤181至步骤183。
在步骤181中，BMS向充电装置发送第三指示信息。
其中，该第三指示信息用于指示充电装置对动力电池充电。
该第三指示信息中例如可以包括充电参数，比如充电电压和/或充电电流的信息。
在步骤182中，充电装置接收BMS发送的该第三指示信息。
在步骤183中，充电装置根据该第三指示信息，对动力电池充电。
在对动力电池加热至预定温度后，BMS会向充电装置发送第三指示信息，以指示其对动力电池充电，充电装置接收第三指示信息并基于第三指示信息对动力电池充电。由于此时动力电池的温度已经升高，避免了低温充电对动力电池的损伤，保证了动力电池的安全性。
当然，在动力电池与充电装置建立物理连接并握手成功后，如果动力电池的温度已经大于温度阈值，那么BMS可以不向充电装置发送第一指示信息，而是向充电装置发送第三指示信息，充电装置接收第三指示信息，并根据第三指示信息对动力电池进行充电。
在一种实现方式中，如图4所示，方法100还包括步骤191至步骤193。
在步骤191中，BMS向充电装置发送第四指示信息，第四指示信息用于指示充电装置停止对动力电池充电。
在步骤192中，充电装置接收BMS发送的第四指示信息，第四指示信息用于 指示充电装置停止对动力电池充电。
在步骤193中，充电装置根据第四指示信息，停止对动力电池充电。
这样，在动力电池充电完成后，BMS通过向充电装置发送第四指示信息，指示充电装置停止对动力电池充电。
图5示出了上述的电池加热的方法100的一种可能的具体实现方式。如图5所示，对动力电池的加热和充电的过程可以包括以下步骤中的部分或全部。
在步骤101中，动力电池与充电设备之间建立物理连接。
在步骤102中，低压辅助电源上电。
在步骤103中，BMS与充电设备例如控制器20之间进握手，建立通信连接。
步骤101至步骤103、以及步骤111至步骤113的具体细节，例如可以参考GB/T 27930-2015标准中的充电流程的细节。
虚线框中的步骤104至步骤110为上述的电池加热的方法100的一种可能的具体实现方式，步骤104至步骤110为需要在现有标准上新增加的内容。
在步骤104中，BMS获取动力电池的温度T，并比较温度T与温度阈值T0。
如果T＜T0，则执行步骤105至步骤110，充电装置对动力电池进行加热；否则，T≥T0时，直接执行步骤111至步骤113，充电装置对动力电池充电。
在步骤105中，BMS确定用于对动力电池加热的脉冲电流的最大幅值和频率。
BMS例如可以通过查表等方式，确定与动力电池相匹配的脉冲电流的最大幅值和/或频率。
在步骤106中，BMS向充电装置方式第一指示信息。
第一指示信息中例如可以携带脉冲电流的最大幅值和频率的信息。
在步骤107中，充电装置接收第一指示信息，并基于第一指示信息对动力电池进行加热。
其中，对动力电池加热过程中的脉冲电流的幅值和频率，可以基于第一指示信息中携带的脉冲电流的最大幅值和频率的信息来确定。
在步骤108中，在加热过程中，BMS比较T与温度阈值T0。
如果T＜T0，则重复执行步骤105至步骤107，充电装置对动力电池进行加热；否则，T≥T0时，执行步骤109和步骤110。
在步骤109中，BMS向充电装置方式第二指示信息。
在步骤110中，充电装置接收第二指示信息，并基于第二指示信息停止对动力电池进行加热。
接着，在步骤110之后，执行步骤111至步骤113。
在步骤111中，进行充电参数的配置。
例如，BMS可以将充电参数比如充电电压和充电电流的信息发送给充电装置。
在步骤112中，充电装置基于该充电参数，对动力电池充电。
在步骤113中，充电结束。
可见，本申请实施例中，动力电池与充电装置之间建立物理连接并握手成功后，动力电池的BMS判断动力电池的当前温度，并在温度较低时先对动力电池进行加热，当动力电池的温度上升后再对其进行充电，能够避免低温充电对动力电池的损伤，提高动力电池的安全性。
本申请实施例对充电装置如何对动力电池充电不做限制。作为示例，在一种实现方式中，该充电装置可以包括双向DC/DC转换器。其中，在步骤140中，根据第一指示信息，对动力电池进行加热，包括：控制双向DC/DC转换器，形成由动力电池向充电装置放电的回路、以及由充电装置向动力电池充电的回路，以在放电和充电的过程中对动力电池进行加热。
双向DC/DC转换器中包括多个开关管，通过控制双向DC/DC转换器中的各个开关管，使动力电池和充电装置之间交替进行充放电，便可以在充放电的过程中对动力电池进行加热。
下面以图6所示的DC/DC转换器为例，描述充电装置如何对动力电池进行加热。图6是以双有源桥(Dual Active Bridge，DAB)架构的DC/DC转换器为例，按照时序对开关管进行控制，可以交替形成由动力电池向充电装置放电的回路、以及由充电装置向动力电池充电的回路，从而在放电和充电的过程中对动力电池进行加热。在实际应用中，还可以采用LLC、CLLC、CF-DAB、部分功率转换器(Partial-Power Converter)等架构的DC/DC转换器。
作为示例，如图6所示的双向DC/DC转换器10，双向DC/DC转换器10中的每个桥臂包括串联的两个开关管，分别为开关管Q1和开关管Q2形成的桥臂、开关管Q3和开关管Q4形成的桥臂、开关管Q5和开关管Q6形成的桥臂、开关管Q7和开关管Q8形成的桥臂。
在不考虑死区时间的情况下，每个桥臂的上下两个开关管为180°互补导通，对角的开关管同时导通。假设开关周期为T，开关频率fs＝1/T，V 1和V 2为输入电压和输出电压，其中V 1侧为连接AC/DC转换器或者储能电池的一侧，V 2侧为连接动力电池的一侧。V AB为图6中A点和B点之间电压，V CD为图6中C点和D点之间电压。i L为电感电流，v L为电感电压。通过控制V AB与V CD之间的角度即移相角来控制双向DC/DC转换器10的传输功率的大小，该移相角与π之比为移相占空比D φ>0。
双向DC/DC转换器10正向工作时，开关管Q 1和Q 4、Q 2和Q 3的驱动信号波形，分别超前开关管Q 5和Q 8、Q 6和Q 7，此时D φ>0；反向工作时，开关管Q 1和Q 4、Q 2和Q 3的驱动信号波形分别滞后开关管Q 5和Q 8、Q 6和Q 7，此时D φ<0。双向DC/DC转换器10的反向工作与正向工作的原理类似，以下以正向工作为例描述双向DC/DC转换器10与动力电池之间的充放电过程。
在一个开关周期内，对于开关状态1(t0时刻前)，在t0时刻前，开关管Q 2和开关管Q 3、开关管Q 6和开关管Q 7导通，电感电流i L为负，电流经过开关管Q 2和开关管Q 3、开关管Q 6和开关管Q 7，功率从V 1侧流向V 2侧。
对于开关状态2(t0时刻至t1时刻)，在t0时刻，V 1侧的开关管全部关断，V 2侧的开关管Q 6和开关管Q 7导通。因为电感电流不能突变，电感电流i L依然为负值，电感电流给寄生电容C 2和C 3充电，与此同时电容C 1和C 4放电。在t1时刻，电容C 2和C 3两端电压达到V 1，电容C 1和C 4两端电压为零，反并联二极D 1和D 4自然导通。
对于开关状态3(t1时刻至t2时刻)，在t1时刻，导通开关管Q 1和开关管Q 4，由于t1时刻开关管Q 1和开关管Q 4的反并联二极管D 1和D 4导通，因此开关管Q 1和开关管Q 4在导通时两端电压为零，实现零电压导通。此时，电感电流i L为负值，V 1侧吸收功率，V 2侧吸收功率，电感中储存的能量向V 1侧、V 2侧传输，V 1侧存在功率回流现象。
对于开关状态4(t2时刻至t3时刻)，t2时刻开始，由于电源V 1的作用，电感电流开始变为正值，流经开关管Q 1和开关管Q 4、开关管Q 6和开关管Q 7，在开关状态4下，V 1侧和V 2侧同时给电感储能，因为功率由V 2侧流向电感，V 2侧存在功率回流现象。
对于开关状态5(t3时刻至t4时刻)，开关管Q 6和开关管Q 7断开，电流给电容C 6和C 7充电，同时电容C 5和C 8放电。在t4时刻，电容C 6和C 7两端电压达到V 2， 电容C 5和C 8两端的电压为零，反并联二极管D 5和D 8自然导通。
对于开关状态6(t4时刻至t5时刻)，在t4时刻，导通开关管Q 5和开关管Q 8，由于此时开关管Q 5和开关管Q 8的反并联二极管D 5和D 8导通，因此D 5和D 8在导通时两端的电压为零，实现零电压导通。在开关状态6下，V 1侧发出功率，V 2侧吸收功率。
在t5时刻后，双向DC/DC转换器10开始另外半个开关周期内的工作，具体过程与上述类似，在此不再赘述。
可见，在双向DC/DC转换器10中，通过动力电池向电感放电、以及电感向动力电池充电，能够在充放电的交替过程中实现对动力电池的加热。
进一步地，充电装置还可以包括AC/DC转换器，例如图1中所示的双向AC/DC转换器30。AC/DC转换器和双向DC/DC转换器连接在交流电源与动力电池之间。
或者，充电装置还可以包括储能电池，例如图2中所示的储能电池60。双向DC/DC转换器连接在储能电池与动力电池之间。
本申请还提供一种充电装置200。如图7所示，充电装置200包括：
接收模块210，用于在充电装置200对动力电池充电之前，接收动力电池的电池管理系统BMS发送的第一指示信息，第一指示信息用于指示充电装置200对动力电池进行加热；
处理模块220，用于根据第一指示信息，对动力电池进行加热。
在一种实现方式中，该第一指示信息中包括用于对动力电池进行加热的脉冲电流的幅值和/或频率的信息。
在一种实现方式中，充电装置200还包括双向DC/DC转换器，处理模块220具体用于：控制双向DC/DC转换器形成由动力电池向充电装置200放电的回路、以及由充电装置200向动力电池充电的回路，以在放电和充电的过程中对动力电池进行加热。
在一种实现方式中，充电装置200还包括AC/DC转换器，AC/DC转换器和双向DC/DC转换器连接在交流电源与动力电池之间。
在一种实现方式中，充电装置200还包括储能电池，双向DC/DC转换器连接在储能电池与动力电池之间。
在一种实现方式中，接收模块210还用于：接收BMS发送的第二指示信息，该第二指示信息用于指示充电装置200停止对动力电池进行加热；处理模块220还用 于：根据第二指示信息，停止对动力电池进行加热。
在一种实现方式中，接收模块210还用于：接收BMS发送的第三指示信息，该第三指示信息用于指示充电装置200对动力电池充电，该第三指示信息中包括充电电压和/或充电电流的信息；处理模块220还用于：根据第三指示信息，对动力电池充电。
在一种实现方式中，接收模块210还用于：接收BMS发送的第四指示信息，该第四指示信息用于指示充电装置200停止对动力电池充电；处理模块220还用于：根据第四指示信息，停止对动力电池充电。
应理解，充电装置200的具体细节可以参考前述针对方法100针对充电装置的描述，为了简洁，此处不再赘述。
本申请还提供一种BMS，如图8所示，BMS 300包括：
处理模块310，用于在充电装置对动力电池充电之前，获取动力电池的温度；
发送模块320，用于在动力电池的温度小于温度阈值时，向充电装置发送第一指示信息，该第一指示信息用于指示充电装置对动力电池进行加热。
在一种实现方式中，该第一指示信息中包括用于对动力电池进行加热的脉冲电流的幅值和/或频率的信息。
在一种实现方式中，在向充电装置发送第一指示信息之前，处理模块310还用于：根据预设的多个温度与多个幅值之间的对应关系，确定脉冲电流的最大幅值为与动力电池的温度对应的幅值；和/或，根据预设的多个温度与多个频率之间的对应关系，确定脉冲电流的频率为与动力电池的温度对应的频率。
在一种实现方式中，发送模块320还用于：在动力电池的温度大于或等于温度阈值时，向充电装置发送第二指示信息，该第二指示信息用于指示充电装置停止对动力电池进行加热。
在一种实现方式中，发送模块320还用于：向充电装置发送第三指示信息，该第三指示信息用于指示充电装置对动力电池充电，该第三指示信息包括充电电压和/或充电电流的信息。
在一种实现方式中，发送模块320还用于：向充电装置发送第四指示信息，该第四指示信息用于指示充电装置停止对动力电池充电。
应理解，BMS 300的具体细节可以参考前述针对方法100针对BMS的描述， 为了简洁，此处不再赘述。
图9示出了本申请另一实施例的电池加热装置的示意性框图。如图9所示，电池加热400包括存储器410和处理器420，存储器410用于存储指令，处理器420用于读取所述指令，并基于所述指令执行上述本申请各个实施例中的电池加热的方法100中由充电装置或者动力电池的控制装置执行的操作。
图10示出了本申请另一实施例的计算机存储介质的示意性框图。如图10所示，计算机存储介质500包括指令510，指令510用于使计算机执行上述本申请各个实施例中的电池加热的方法100中由充电装置或者动力电池的控制装置执行的操作。
本申请还提供一种动力装置，包括动力电池、以及上述任一实施例中的充电装置，该充电装置与动力电池相连，用于在对动力电池充电之前，对动力电池进行加热。动力装置例如可以是动力汽车等。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考上述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。

Claims (30)

  1. 一种电池加热的方法，其特征在于，由充电装置执行，所述方法包括：
    在所述充电装置对动力电池充电之前，从动力电池的控制装置接收第一指示信息，所述第一指示信息用于指示所述充电装置对所述动力电池进行加热；
    根据所述第一指示信息，对所述动力电池进行加热。
  2. 根据权利要求1所述的方法，其特征在于，所述第一指示信息中包括用于对所述动力电池进行加热的脉冲电流的幅值和/或频率的信息。
  3. 根据权利要求1或2所述的方法，其特征在于，所述充电装置包括双向DC/DC转换器，所述根据所述第一指示信息，对所述动力电池进行加热，包括：
    控制所述双向DC/DC转换器形成由所述动力电池向所述充电装置放电的回路、以及由所述充电装置向所述动力电池充电的回路，以在放电和充电的过程中对所述动力电池进行加热。
  4. 根据权利要求3所述的方法，其特征在于，所述充电装置还包括AC/DC转换器，所述AC/DC转换器和所述双向DC/DC转换器连接在交流电源与所述动力电池之间。
  5. 根据权利要求3所述的方法，其特征在于，所述充电装置还包括储能电池，所述双向DC/DC转换器连接在所述储能电池与所述动力电池之间。
  6. 根据权利要求1至5中任一项所述的方法，其特征在于，所述方法还包括：
    从所述控制装置接收第二指示信息，所述第二指示信息用于指示所述充电装置停止对所述动力电池进行加热；
    根据所述第二指示信息，停止对所述动力电池进行加热。
  7. 根据权利要求1至6中任一项所述的方法，其特征在于，所述方法还包括：
    从所述控制装置接收第三指示信息，所述第三指示信息用于指示所述充电装置对所述动力电池充电，所述第三指示信息中包括充电电压和/或充电电流的信息；
    根据所述第三指示信息，对所述动力电池充电。
  8. 根据权利要求7所述的方法，其特征在于，所述方法还包括：
    从所述控制装置接收第四指示信息，所述第四指示信息用于指示所述充电装置停止对所述动力电池充电；
    根据所述第四指示信息，停止对所述动力电池充电。
  9. 一种电池加热的方法，其特征在于，由动力电池的控制装置执行，所述方法包括：
    在充电装置对所述动力电池充电之前，获取所述动力电池的温度；
    若所述动力电池的温度小于温度阈值，向所述充电装置发送第一指示信息，所述第一指示信息用于指示所述充电装置对所述动力电池进行加热。
  10. 根据权利要求9所述的方法，其特征在于，所述第一指示信息中包括用于对所述动力电池进行加热的脉冲电流的幅值和/或频率的信息。
  11. 根据权利要求10所述的方法，其特征在于，在所述向所述充电装置发送第一指示信息之前，所述方法还包括：
    根据预设的多个温度与多个幅值之间的对应关系，确定所述脉冲电流的最大幅值为与所述动力电池的温度对应的幅值；和/或，
    根据预设的多个温度与多个频率之间的对应关系，确定所述脉冲电流的频率为与所述动力电池的温度对应的频率。
  12. 根据权利要求9至11中任一项所述的方法，其特征在于，所述方法还包括：
    在所述动力电池的温度大于或等于所述温度阈值时，向所述充电装置发送第二指示信息，所述第二指示信息用于指示所述充电装置停止对所述动力电池进行加热。
  13. 根据权利要求9至12中任一项所述的方法，其特征在于，所述方法还包括：
    向所述充电装置发送第三指示信息，所述第三指示信息用于指示所述充电装置对所述动力电池充电，所述第三指示信息包括充电电压和/或充电电流的信息。
  14. 根据权利要求13所述的方法，其特征在于，所述方法还包括：
    向所述充电装置发送第四指示信息，所述第四指示信息用于指示所述充电装置停止对所述动力电池充电。
  15. 一种充电装置，其特征在于，包括：
    接收模块，用于在所述充电装置对动力电池充电之前，从所述动力电池的控制装置接收第一指示信息，所述第一指示信息用于指示所述充电装置对所述动力电池进行加热；
    处理模块，用于根据所述第一指示信息，对所述动力电池进行加热。
  16. 根据权利要求15所述的充电装置，其特征在于，所述第一指示信息中包括用 于对所述动力电池进行加热的脉冲电流的幅值和/或频率的信息。
  17. 根据权利要求15或16所述的充电装置，其特征在于，所述充电装置还包括双向DC/DC转换器，所述处理模块具体用于：
    控制所述双向DC/DC转换器形成由所述动力电池向所述充电装置放电的回路、以及由所述充电装置向所述动力电池充电的回路，以在放电和充电的过程中对所述动力电池进行加热。
  18. 根据权利要求17所述的充电装置，其特征在于，所述充电装置还包括AC/DC转换器，所述AC/DC转换器和所述双向DC/DC转换器连接在交流电源与所述动力电池之间。
  19. 根据权利要求17所述的充电装置，其特征在于，所述充电装置还包括储能电池，所述双向DC/DC转换器连接在所述储能电池与所述动力电池之间。
  20. 根据权利要求15至19中任一项所述的充电装置，其特征在于，
    所述接收模块还用于：从所述控制装置接收第二指示信息，所述第二指示信息用于指示所述充电装置停止对所述动力电池进行加热；
    所述处理模块还用于：根据所述第二指示信息，停止对所述动力电池进行加热。
  21. 根据权利要求15至20中任一项所述的充电装置，其特征在于，
    所述接收模块还用于：从所述控制装置接收第三指示信息，所述第三指示信息用于指示所述充电装置对所述动力电池充电，所述第三指示信息中包括充电电压和/或充电电流的信息；
    所述处理模块还用于：根据所述第三指示信息，对所述动力电池充电。
  22. 根据权利要求21所述的充电装置，其特征在于，
    所述接收模块还用于：从所述控制装置接收第四指示信息，所述第四指示信息用于指示所述充电装置停止对所述动力电池充电；
    所述处理模块还用于：根据所述第四指示信息，停止对所述动力电池充电。
  23. 一种电池管理系统BMS，其特征在于，包括：
    处理模块，用于在充电装置对所述动力电池充电之前，获取所述动力电池的温度；
    发送模块，用于在所述动力电池的温度小于温度阈值时，向所述充电装置发送第一指示信息，所述第一指示信息用于指示所述充电装置对所述动力电池进行加热。
  24. 根据权利要求23所述的BMS，其特征在于，所述第一指示信息中包括用于对所述动力电池进行加热的脉冲电流的幅值和/或频率的信息。
  25. 根据权利要求24所述的BMS，其特征在于，在所述向所述充电装置发送第一指示信息之前，所述处理模块还用于：
    根据预设的多个温度与多个幅值之间的对应关系，确定所述脉冲电流的最大幅值为与所述动力电池的温度对应的幅值；和/或，
    根据预设的多个温度与多个频率之间的对应关系，确定所述脉冲电流的频率为与所述动力电池的温度对应的频率。
  26. 根据权利要求23至25中任一项所述的BMS，其特征在于，所述发送模块还用于：
    在所述动力电池的温度大于或等于所述温度阈值时，向所述充电装置发送第二指示信息，所述第二指示信息用于指示所述充电装置停止对所述动力电池进行加热。
  27. 根据权利要求23至26中任一项所述的BMS，其特征在于，所述发送模块还用于：
    向所述充电装置发送第三指示信息，所述第三指示信息用于指示所述充电装置对所述动力电池充电，所述第三指示信息包括充电电压和/或充电电流的信息。
  28. 根据权利要求27所述的BMS，其特征在于，所述发送模块还用于：
    向所述充电装置发送第四指示信息，所述第四指示信息用于指示所述充电装置停止对所述动力电池充电。
  29. 一种电池加热装置，其特征在于，包括存储器和处理器，所述存储器用于存储指令，所述处理器用于读取所述指令，并基于所述指令执行上述权利要求1至14中任一项所述的电池加热的方法。
  30. 一种计算机存储介质，其特征在于，包括用于执行上述权利要求1至14中任一项所述的电池加热的方法的指令。
PCT/CN2022/080263 2022-03-11 2022-03-11 电池加热的方法、充电装置和电池管理系统 Ceased WO2023168678A1 (zh)

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WO2023004712A1 (zh) * 2021-07-29 2023-02-02 宁德时代新能源科技股份有限公司 充放电装置、电池充电的方法和充放电系统
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