CN115571023A - Battery heating control method and device and vehicle - Google Patents

Battery heating control method and device and vehicle Download PDF

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Publication number
CN115571023A
CN115571023A CN202211238822.4A CN202211238822A CN115571023A CN 115571023 A CN115571023 A CN 115571023A CN 202211238822 A CN202211238822 A CN 202211238822A CN 115571023 A CN115571023 A CN 115571023A
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battery
temperature
heating
motor
equal
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陈明
李雪静
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Great Wall Motor Co Ltd
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Great Wall Motor Co Ltd
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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
    • 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
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • 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
    • H01M10/60—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
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
    • 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
    • H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
    • H01M10/663—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an air-conditioner or an engine
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/425—Temperature
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/545—Temperature
    • 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)
  • Manufacturing & Machinery (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention provides a battery heating control method, a device and a vehicle, wherein the battery heating control method comprises the following steps: when the vehicle is in a charging state, acquiring the battery temperature, the battery SOC value and the motor temperature parameter, determining a battery heating mode according to the battery temperature, the battery SOC value and the motor temperature parameter, wherein the battery heating mode comprises battery pulse heating and/or motor waste heat heating, and controlling the battery to heat according to the battery heating mode. According to the battery heating control method, the battery heating modes are integrally adjusted through the battery temperature, the battery SOC value and the motor temperature parameter which are monitored in real time, namely the battery heating modes are adopted according to different conditions, so that the battery heating efficiency is improved, the battery heating energy consumption is reduced, the problems of low vehicle low-temperature charging efficiency and high battery heating energy consumption are solved, and the battery charging efficiency under the low-temperature limit condition is improved.

Description

Battery heating control method and device and vehicle
Technical Field
The invention relates to the technical field of vehicle batteries, in particular to a battery heating control method and device and a vehicle.
Background
The power battery of the pure electric vehicle has the phenomena of small charging current and slow charging speed when being charged under the condition of low temperature limit, and the current method in the industry solves the problem caused by low temperature charging by means of increasing the temperature of the battery under the condition of low temperature charging of the vehicle.
In the prior art, a PTC (Positive Temperature Coefficient) heating method can be adopted to heat the battery under a low Temperature condition, a PTC heating element is used for heating cooling liquid, and a circulating water pump flows through a battery cold plate to achieve the effect of heating the battery.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for controlling battery heating, and a vehicle, so as to solve the problems of low vehicle low-temperature charging efficiency and large battery heating energy consumption.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a battery heating control method, comprising:
when the vehicle is in a charging state, acquiring battery temperature, a battery SOC value and motor temperature parameters;
determining a battery heating mode according to the battery temperature, the battery SOC value and the motor temperature parameter; the battery heating mode comprises battery pulse heating and/or motor waste heat heating;
and controlling the battery to heat according to the battery heating mode.
Further, the determining the battery heating mode according to the battery temperature, the battery SOC value and the motor temperature parameter includes:
if the battery temperature is less than or equal to the heating starting temperature and the battery SOC value is greater than or equal to the heating starting SOC value, determining to start pulse heating of the battery;
and if the difference between the motor outlet water temperature and the battery temperature is greater than or equal to a preset value and the motor outlet water temperature is less than or equal to a preset outlet water temperature, determining to start the motor to heat by using waste heat.
Further, if the battery temperature is less than or equal to the heating starting temperature and the battery SOC value is greater than or equal to the heating starting SOC value, after the pulse heating of the battery is started, the method includes:
if the temperature of the motor controller is higher than a first preset temperature or the water temperature of the motor inlet is higher than the first preset inlet water temperature, the battery is withdrawn from pulse heating, and a motor water pump is controlled to be started to supply heat for the motor to dissipate;
and restarting the battery for pulse heating if the temperature of the motor controller is less than or equal to the second preset temperature and the water temperature of the motor inlet is less than or equal to the second preset inlet water temperature.
Further, if the battery temperature is less than or equal to the heating start temperature and the battery SOC value is greater than or equal to the heating start SOC value, after determining that the pulse heating of the battery is started, the method includes:
when the temperature of the motor controller is less than or equal to the first preset temperature and the water temperature at the motor inlet is less than or equal to the first preset inlet water temperature, if the temperature difference of the battery is greater than the first preset temperature difference, the battery is withdrawn from pulse heating, the battery water pump is controlled to be started, and a preset temperature equalizing strategy is executed; wherein the battery temperature difference is the difference value between the highest battery temperature and the lowest battery temperature;
and when the temperature difference of the battery is smaller than or equal to a second preset temperature difference, if the difference between the water temperature at the outlet of the motor and the temperature of the battery is larger than or equal to the preset value and the water temperature at the outlet of the motor is smaller than or equal to the preset outlet water temperature, determining to start the motor to heat by waste heat.
Further, if the difference between the motor outlet water temperature and the battery temperature is greater than or equal to the preset value, and the motor outlet water temperature is less than or equal to the preset outlet water temperature, after determining to start the motor waste heat heating, the method includes:
if the difference between the water temperature at the outlet of the motor and the temperature of the battery is smaller than the preset value, the motor is withdrawn from the heating process by waste heat;
otherwise, restarting the motor to heat by using the residual heat.
Further, after the motor is started to heat by waste heat, the method includes:
if the battery temperature is less than or equal to the heating starting temperature and the battery SOC value is greater than or equal to the heating starting SOC value, determining to restart the pulse heating of the battery;
and if the battery temperature is higher than the heating starting temperature or the battery SOC value is lower than a preset SOC threshold value, the battery heating mode is exited.
Further, the controlling the battery to heat according to the battery heating mode includes:
if the battery heating mode is the battery pulse heating mode, a first control signal is sent to a motor controller to control the motor to output current waveform to perform pulse heating on the battery.
Further, the controlling the battery to heat according to the battery heating mode includes:
and if the battery heating mode is heating by the waste heat of the motor, sending a second control signal to the air conditioner controller to control heat exchange between a refrigerant pipeline inside the battery and a cooling liquid pipeline to heat the battery.
Another objective of the present invention is to provide a battery heating control device to solve the problems of low vehicle charging efficiency at low temperature and high battery heating energy consumption.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a battery heating control apparatus comprising:
the information acquisition module is used for acquiring the battery temperature, the battery SOC value and the motor temperature parameter when the vehicle is in a charging state;
the mode determining module is used for determining a battery heating mode according to the battery temperature, the battery SOC value and the motor temperature parameter; wherein the battery heating mode comprises battery pulse heating and/or motor waste heat heating;
and the control heating module is used for controlling the battery to heat according to the battery heating mode.
Further, the control heating module includes:
and the first control heating submodule is used for sending a first control signal to the motor controller if the battery heating mode is the battery pulse heating mode, and controlling the motor to output a current waveform to carry out pulse heating on the battery.
Further, the control heating module includes:
and the second control heating submodule is used for sending a second control signal to the air conditioner controller if the battery heating mode is heating by the waste heat of the motor, and controlling heat exchange between a refrigerant pipeline inside the battery and a cooling liquid pipeline to heat the battery.
Compared with the prior art, the battery heating control method has the following advantages:
according to the invention, when a vehicle is in a charging state, the battery temperature, the battery SOC value and the motor temperature parameter are obtained, the battery heating mode is determined according to the battery temperature, the battery SOC value and the motor temperature parameter, the battery heating mode comprises battery pulse heating and/or motor waste heat heating, and the battery is controlled to be heated according to the battery heating mode. According to the embodiment of the invention, the battery heating modes are integrated and adjusted through the battery temperature, the battery SOC value and the motor temperature parameter which are monitored in real time, namely, the battery heating modes are dynamically switched by adopting the appropriate battery heating modes according to the actual condition of the battery in the vehicle charging process, so that resources are fully utilized, the battery heating efficiency under the charging condition is improved, the battery charging efficiency under the low-temperature limit condition is improved, the battery heating energy consumption is reduced, and the charging effect under the low-temperature condition is improved.
To achieve the above object, the present application also provides a vehicle including: the battery heating control device is used for realizing the battery heating control method.
The vehicle has the same advantages as the method described above over the prior art and is not described in detail here.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart illustrating steps of a battery heating control method according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating specific steps of a method for controlling heating of the battery shown in FIG. 1 according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a battery heating control device according to an embodiment of the present invention;
fig. 4 is an interaction flowchart of a battery heating control device according to an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description. It should be apparent that the embodiments described are some, but not all embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
Referring to fig. 1, fig. 1 is a flowchart illustrating steps of a battery heating control method according to an embodiment of the present application, including the following steps:
step 101, when a vehicle is in a charging state, acquiring a battery temperature, a battery SOC value and a motor temperature parameter.
In the embodiment of the invention, when the vehicle controller detects that the vehicle is in a charging connection state signal sent by the charger, namely the vehicle is in a charging state, a Battery Management System (BMS) acquires a Battery temperature and a Battery SOC value; a Motor Control Unit (MCU) constantly monitors Motor temperature parameters including Motor controller temperature, motor inlet water temperature and Motor outlet water temperature, and the acquired parameters are used to monitor the battery state in the vehicle charging process in real time.
Specifically, the battery management system BMS is used for accurately estimating a State of Charge (SOC) of the power battery, ensuring that the SOC of the battery is maintained within a reasonable range, preventing damage to the battery due to overcharge, and dynamically monitoring a working State of the power battery, that is, collecting a battery temperature of each battery in the power battery in real time during charging of the battery, so as to prevent the battery from being overcharged.
It should be noted that the battery SOC is a state of charge, and is used to reflect the remaining capacity of the battery, and is numerically defined as a ratio of the remaining capacity to the battery capacity, and has a value ranging from 0 to 100%, and when the SOC =0, it indicates that the battery is at a residual capacity of 0, and when the SOC =100%, it indicates that the battery is fully charged. The battery SOC estimates the magnitude of the battery SOC according to parameters such as battery terminal voltage, charging and discharging current, internal resistance and the like through a battery management system.
102, determining a battery heating mode according to the battery temperature, the battery SOC value and the motor temperature parameter; the battery heating mode comprises battery pulse heating and/or motor waste heat heating.
In the embodiment of the invention, the vehicle control unit determines the battery heating mode to be battery pulse heating and motor waste heat heating according to the battery temperature and the battery SOC which are acquired in real time in the charging process, namely according to the charge state and the charge running state in the battery charging process and by combining the motor temperature parameters monitored by the motor controller, and adjusts the battery heating mode.
It should be noted that, the lithium ion power battery of the vehicle is relatively significantly affected by the ambient temperature, and in the environment of the low temperature limit, the start and charge of the pure electric vehicle are also affected, that is, when the lithium ion power battery with the higher usage rate of the pure electric vehicle is at about-10 ℃, the available discharge capacity of the lithium ion power battery is suddenly decreased, and only about 30% of the available discharge capacity of the lithium ion power battery at the normal temperature can be maintained, and the lithium ion battery is charged below 0 ℃ to easily cause the lithium analysis phenomenon, which causes irreversible damage and safety problems, resulting in low charging efficiency in the low temperature environment.
Specifically, a battery heating mode is determined according to the battery temperature, the battery SOC value and the motor temperature parameter, and step 102 heats the battery through two battery heating modes, namely, battery pulse heating and motor waste heat heating:
one battery heating mode is: the battery pulse heating, namely through the loop that whole car power battery and motor inverter make up, control IGBT (Insulated Gate Bipolar Transistor) periodic conduction realizes the periodic storage/discharge of motor inductance, makes the battery lithium ion shuttle between negative pole and positive pole under the alternating current effect, because ohmic internal resistance and electrochemical reaction produce heat and realize self-heating.
It should be noted that, in a low-temperature charging environment, the battery pulse heating can rapidly heat the battery to raise the temperature of the battery, and the battery and the motor form a closed loop, the SOC value of the battery gradually decreases with the increase of the temperature of the battery, and the temperatures of the motor controller and the water at the inlet and the outlet of the motor gradually increase, that is, in the process of starting the battery pulse, the battery management system BMS determines whether the SOC of the battery reaches a preset threshold, the motor controller MCU determines whether the temperature of the motor controller body and the water temperature are over-temperature at any time, and the vehicle controller determines whether to quit the battery heating function according to the temperature determination conditions, so as to prevent the over-discharge of the battery.
Another battery heating mode is: the motor waste heat is used for heating, the motor loop is connected with the battery loop and the air conditioner refrigerant loop through the cooling device and the proportional valve, the battery is heated and the passenger compartment is heated by using the motor waste heat, and when the heating requirement of the battery is low, the motor waste heat is used for heating, so that part of electric energy can be saved.
In the embodiment of the invention, the battery heating mode is determined to be battery pulse heating according to the battery SOC value, the battery temperature in the battery heating process and the motor temperature parameter, and after the battery temperature is obviously increased, the battery is heated by using the waste heat of the motor, so that the battery heating efficiency is improved, and the energy consumption for heating the battery is reduced.
In the embodiment of the invention, when the vehicle controller detects that the vehicle is in a charging state, the battery management system BMS monitors the battery temperature and the battery SOC, the motor controller MCU monitors the motor temperature parameter, and if the battery temperature is less than or equal to the heating starting temperature and the battery SOC value is more than or equal to the heating starting SOC value, the pulse heating of the battery is determined to be started; and if the difference between the water temperature at the outlet of the motor and the temperature of the battery is greater than or equal to a preset value, and the water temperature at the outlet of the motor is less than or equal to the preset outlet water temperature, determining to start the motor for heating by using the waste heat. The heating start temperature and the heating start SOC value are determined according to the battery performance, and are not particularly limited herein.
Specifically, step 102 includes:
if the temperature of the motor controller is higher than a first preset temperature or the water temperature of the motor inlet is higher than the first preset inlet water temperature, the battery is withdrawn for pulse heating, and the motor water pump is controlled to be started to supply the motor for heat dissipation; and if the temperature of the motor controller is less than or equal to the second preset temperature and the water temperature of the motor inlet is less than or equal to the second preset inlet water temperature, restarting the battery for pulse heating.
In this embodiment, the first preset temperature and the second preset temperature are set temperature values for preventing the motor controller from being too high in temperature due to a large amount of waste heat generated by the motor during the charging and heating processes, and the first preset temperature is greater than the second preset temperature. Similarly, the first preset inlet water temperature and the second preset inlet water temperature are temperature values for preventing the motor water temperature from being too high in the charging and heating process and influencing the setting of the battery performance, and the first preset inlet water temperature is larger than the second preset inlet water temperature. Of course, the above is merely an example, and the preset temperature parameter may also include other parameters during the actual use process. In this embodiment, the preset temperature value is not limited, and is set according to the battery performance and the vehicle charging condition in the actual using process, which is not described in detail herein.
The motor controller controls the starting of the motor water pump, the heat is dissipated through the low-temperature radiator, the water temperature of the motor controller and the water temperature of the motor are reduced until the temperature of the motor controller is smaller than or equal to a second preset temperature, the water temperature of the motor inlet is smaller than or equal to the second preset inlet water temperature, and the whole vehicle controller controls the battery to enter the pulse heating mode again.
Specifically, step 102 includes:
when the temperature of the motor controller is smaller than or equal to a first preset temperature and the water temperature of the motor inlet is smaller than or equal to the first preset inlet water temperature, if the temperature difference of the battery is larger than the first preset temperature difference, the battery is quitted from pulse heating, the battery water pump is controlled to be started, and a preset temperature equalizing strategy is executed.
It should be noted that the battery temperature difference is a difference between a highest battery temperature and a lowest battery temperature during a battery heating process, and is used for representing a temperature change during a battery charging process. And in the battery heating process, the vehicle control unit synchronously monitors the difference between the highest temperature and the lowest temperature of the battery, and determines whether to quit the pulse heating of the battery according to the temperature difference of the battery. The preset temperature equalizing strategy of the battery water pump is used for controlling the battery water pump to realize the temperature equalization of the battery, the problem of the temperature equalization of the battery is considered by adopting the preset temperature equalizing strategy of the battery water pump, the problem of the thermal safety of the battery is avoided, the driving experience of a user on the low-temperature endurance, the low-temperature charging and the low-temperature dynamic performance of the whole vehicle is met, and the technical scheme provided by the embodiment of the invention has stronger applicability.
And when the temperature difference of the battery is smaller than or equal to a second preset temperature difference, if the difference between the water temperature at the outlet of the motor and the temperature of the battery is larger than or equal to a preset value and the water temperature at the outlet of the motor is smaller than or equal to a preset outlet water temperature, determining to start the motor for heating by using the waste heat.
Specifically, after determining that the battery heating mode is battery pulse heating, the method includes:
if the difference between the water temperature at the outlet of the motor and the temperature of the battery is smaller than a preset value, the motor is quitted from heating by waste heat; otherwise, restarting the motor for heating by using the residual heat.
In the process of heating by using the waste heat of the motor, when the difference between the water temperature at the outlet of the motor and the temperature of the battery is smaller than a preset value, the motor is withdrawn from the waste heat heating battery, the water temperature of the motor is continuously stored, and when the condition that the battery is heated by using the waste heat of the motor is met, the waste heat of the motor is restarted.
Specifically, step 102 includes:
if the battery temperature is less than or equal to the heating starting temperature and the battery SOC value is greater than or equal to the heating starting SOC value, determining to restart the pulse heating of the battery; and if the temperature of the battery is higher than the heating starting temperature or the SOC value of the battery is lower than a preset SOC threshold value, the battery heating mode is exited.
In the embodiment of the invention, the battery heating mode is determined to be battery pulse heating or motor waste heat heating according to the battery temperature and the battery SOC value, and the battery heating mode is determined to be started or quit according to the battery heating condition, so that the battery heating mode is reasonably adjusted, the battery heating efficiency is further improved, resources are fully utilized, and the energy consumption in the battery heating process is reduced.
And 103, controlling the battery to heat according to the battery heating mode.
In the embodiment of the invention, in the charging state of the vehicle, the vehicle controller indicates a control unit corresponding to a battery heating mode according to the determined battery heating mode, wherein the battery heating mode comprises battery pulse heating and motor waste heat heating, and a control loop heats the battery.
Specifically, in order to enable those skilled in the art to more clearly understand the overall process of the battery heating control method disclosed in the above embodiment of the present invention, referring to fig. 4, the particular battery heating control method may be applied to the battery heating interaction process provided in the embodiment of the present invention shown in fig. 4, where the vehicle controller is in communication connection with the motor controller and is also connected with the charger, and the embodiment of the present invention is applied to the vehicle charging state.
In the embodiment of the invention, when the vehicle controller monitors that the vehicle is currently in a charging state, the battery management system monitors the battery temperature and the battery SOC, and if the battery temperature is less than or equal to the heating starting temperature and the battery SOC is greater than or equal to the heating starting SOC, the battery is heated in a battery pulse heating mode. The method comprises the steps that a motor controller MCU monitors motor temperature parameters, a battery management system BMS monitors battery SOC or battery temperature in the battery heating process, according to parameter judgment conditions, whether battery pulse heating exits or not is determined, the battery is switched to be heated by motor waste heat according to the condition that the battery is over-discharged, battery charging is started synchronously until the battery temperature reaches a target temperature, and the battery heating mode exits.
It should be noted that the specific process of the pulse heating of the battery is as follows: the battery management system BMS is connected with the motor controller, the battery management system BMS sends out control signals to the motor controller, after the motor controller receives the control signals, the motor system enters a pulse heating mode to perform pulse heating on the battery, and cooling liquid absorbing heat of the motor system enters a cooling pipeline of the power battery to heat the power battery.
It should be noted that the specific process of heating by the waste heat of the motor is as follows: the battery management system BMS sends a control signal to the air conditioner controller, the air conditioner controller connects the motor loop with the battery loop and the air conditioner refrigerant loop through the cooling device and the proportional valve, and the battery heating and the heating of the passenger compartment are carried out by utilizing the residual heat of the motor.
According to the battery heating control method provided by the embodiment of the invention, when a vehicle is in a charging state, the battery temperature, the battery SOC value and the motor temperature parameter are obtained, the battery heating mode is determined according to the battery temperature, the battery SOC value and the motor temperature parameter, the battery heating mode comprises battery pulse heating and/or motor waste heat heating, and the battery is controlled to be heated according to the battery heating mode. The battery heating modes are integrated and adjusted through the battery temperature, the battery SOC value and the motor temperature parameters which are monitored in real time, namely, the battery heating modes are dynamically switched by adopting the appropriate battery heating modes according to the actual condition of the battery in the vehicle charging process, resources are fully utilized, and the battery heating efficiency under the charging condition is improved, so that the battery charging efficiency under the low-temperature limit condition is improved, the battery heating energy consumption is reduced, and the charging effect under the low-temperature condition is improved.
In order to enable those skilled in the art to more clearly understand the overall flow of the battery heating control method disclosed in the above embodiment of the present invention, referring to fig. 2, fig. 2 shows a flow of steps of the battery heating control method disclosed in the embodiment of the present invention, including:
and S201, charging the vehicle.
Specifically, under the condition that the vehicle controller detects that the vehicle is in the charging state, the vehicle controller needs to determine to start battery heating according to the charging running state and the battery state so as to improve the battery charging efficiency under the low-temperature charging condition, namely, after the vehicle controller detects that the vehicle is in the charging state, the vehicle controller sends a signal to the battery management system BMS and the motor controller MCU, the battery management system BMS further obtains the battery temperature and the battery SOC, and the motor controller MCU monitors the motor temperature parameter.
It should be noted that, the battery management system BMS accurately estimates the battery SOC, ensures that the battery SOC is maintained within a reasonable range, prevents damage to the battery due to overcharging, and dynamically monitors the heating state of the power battery by the motor controller, that is, in the battery heating process, the battery temperature and the motor temperature of each battery in the power battery are collected in real time, thereby preventing the battery from overheating.
S202, the battery temperature is less than or equal to the heating starting temperature, and the battery SOC is greater than or equal to the heating starting SOC value.
Specifically, the battery management system BMS monitors a battery temperature and a battery SOC in the power battery pack during charging of the vehicle, and the heating start temperature and the heating start SOC value are determined according to the battery performance, and in an embodiment of the present invention, the heating start temperature may be 5 ℃ and the heating start SOC of the battery SOC may be 30%, that is, when the battery temperature is greater than or equal to 5 ℃ and the battery SOC is greater than or equal to 30%, the battery is in a low-temperature charging state, step 203 is entered, and pulse heating of the battery is started, otherwise, step 204 is entered, and pulse heating of the battery is not started.
Of course, the above heating start temperature and the heating start SOC value are only examples of the embodiment of the present invention, and in the actual use process, S202 may also set the heating start parameter range according to the vehicle power battery, which is not described in detail herein.
It should be noted that the SOC is a state of charge, which is used to reflect the remaining capacity of the battery, and is defined numerically as a ratio of the remaining capacity to the battery capacity, and the range of values is 0-100%, when the SOC =0, it indicates that the battery has no remaining capacity, and when the SOC =100%, it indicates that the battery is fully charged. The battery SOC estimates the size of the battery SOC through a battery management system according to parameters such as battery terminal voltage, charging and discharging current and internal resistance.
And S203, starting pulse heating of the battery.
Specifically, the battery management system BMS sends a first control signal to the motor controller MCU to control the output current waveform of the motor to perform pulse heating on the battery; the first control signal is used for instructing the motor controller to start the battery pulse heating loop.
It should be noted that, in a low-temperature charging environment, the battery pulse heating can rapidly heat the battery to increase the battery temperature, and as the battery temperature increases, the SOC of the battery gradually decreases, that is, in the process of starting the battery pulse, step 205 is entered, and the motor controller determines the motor controller temperature and the motor inlet water temperature.
And S204, not starting the pulse heating of the battery.
Specifically, if the battery temperature is higher than the heating start temperature or the battery SOC is lower than the heating start SOC value, the battery heating condition is not provided, and the battery pulse heating is not started.
S205, the temperature of the motor controller is smaller than or equal to a first preset temperature, and the water temperature of the motor inlet is smaller than or equal to the first preset inlet water temperature.
Specifically, after the battery is started to perform pulse heating, in the process of heating the battery, the motor controller comprises a sensor module and is used for monitoring the body temperature of the motor controller, the inlet water temperature of the motor and the outlet water temperature of the motor, and the motor controller judges whether the temperature of the motor controller and the inlet water temperature of the motor are smaller than a preset temperature value or not, wherein the first preset temperature and the first preset inlet water temperature are determined according to the charging protection of the battery, specific values are determined according to the performance and the charging requirement of the battery, and the specific values are not limited in the steps; otherwise, step 207 is entered, the battery pulse heating is exited, and the motor water pump is started.
And S206, the temperature difference of the battery is smaller than or equal to a first preset temperature difference.
Specifically, in the battery pulse heating process, the battery SOC value gradually decreases along with the increase of the heating temperature, whether the battery temperature is heated to a preset temperature needs to be judged, an instruction is sent to the battery management system through the vehicle control unit, and the battery management system synchronously monitors the difference between the highest temperature and the lowest temperature of the battery in the battery pulse heating process, wherein the first preset temperature difference is determined according to the battery overheating protection, the specific value is determined according to the battery performance and the charging requirement, and the method is not limited in this case; otherwise, if the temperature difference of the battery is greater than the first preset temperature difference, the step 207 is executed, the battery is removed from pulse heating, and the motor water pump is started.
And S207, exiting the pulse heating of the battery and starting the motor water pump.
Specifically, in order to avoid the over-temperature of the motor controller in the battery pulse heating process, when the pulse heating function is judged to be quitted, the motor controller controls the starting of the motor water pump, the heat is dissipated through the low-temperature radiator, the water temperature of the motor controller and the water temperature of the motor are reduced, and whether the battery pulse heating is restarted is judged according to the step S208.
And S208, the temperature of the motor controller is less than or equal to a second preset temperature, and the water temperature of the motor inlet is less than or equal to the second preset inlet water temperature.
Specifically, in the process of heating the battery by using the battery pulse, whether the temperature of the motor controller and the water temperature at the inlet of the motor are heated to a preset temperature is judged, wherein the preset temperature is determined according to the overheat protection of the motor, and a specific numerical value is determined according to the performance of the motor, which is not limited herein; otherwise, the temperature of the motor controller is higher than the second preset temperature, the water temperature of the motor inlet is higher than the second preset inlet water temperature, and the motor water pump needs to be started continuously to ensure heat dissipation.
S209, the difference between the water temperature at the outlet of the motor and the temperature of the battery is greater than or equal to a preset value, and the water temperature at the outlet of the motor is less than or equal to the preset outlet water temperature.
Specifically, in this embodiment, when the temperature difference between the water temperature at the motor outlet and the temperature of the battery is greater than or equal to the preset value of 5 ℃, that is, the water temperature at the motor outlet meets the requirement of battery overheat protection, and under the condition that the performance of the battery is not affected, the water temperature at the motor outlet is less than or equal to the preset outlet water temperature, the step S212 is performed, and the battery is heated by using the residual heat of the motor.
And S210, exiting the pulse heating of the battery and starting the water pump of the battery.
Specifically, when the temperature of the motor controller is less than or equal to a first preset temperature and the water temperature at the inlet of the motor is less than or equal to the first preset inlet water temperature, if the temperature difference of the battery is greater than the first preset temperature difference, the battery pulse heating is quitted, and the battery water pump is controlled to be started so as to execute a preset temperature equalization strategy.
It should be noted that the preset temperature equalization strategy of the battery water pump is used for controlling the battery water pump to realize battery temperature equalization, the battery temperature equalization problem is considered by adopting the preset temperature equalization strategy of the battery water pump, the battery thermal safety problem is avoided, and the driving experience of a user on low-temperature cruising, low-temperature charging and low-temperature dynamic performance of the whole vehicle is met.
And S211, the temperature difference of the battery is less than or equal to a second preset temperature difference.
Specifically, the battery water pump is controlled to be started to execute the preset temperature equalization strategy until the battery temperature difference is smaller than or equal to a second preset temperature difference, the step S209 is performed, otherwise, the battery water pump is continuously started to execute the preset temperature equalization strategy.
S212, starting the motor to heat by waste heat.
Specifically, when the temperature difference between the water temperature at the outlet of the motor and the temperature of the battery is greater than or equal to a preset value, namely the water temperature at the outlet of the motor meets the requirement of battery overheating protection, the battery heating mode is determined to be heating by waste heat of the motor, a second control signal is sent to the air conditioner controller, and heat exchange between a refrigerant pipeline inside the battery and a cooling liquid pipeline is controlled to heat the battery; the second control signal is used for indicating the air conditioner controller to start the motor and the heat exchange loop of the battery.
And S213, the difference between the water temperature at the outlet of the motor and the temperature of the battery is greater than or equal to a preset value.
Specifically, if the difference between the water temperature at the outlet of the motor and the battery temperature is greater than or equal to a preset value, the step S216 is performed to determine the battery temperature and the battery SOC value; otherwise, if the difference between the water temperature at the outlet of the motor and the temperature of the battery is smaller than the preset value, the step S214 is entered, and the motor heating by the residual heat is exited.
And S214, exiting the motor for heating by waste heat.
S215, the difference between the water temperature at the outlet of the motor and the temperature of the battery is larger than or equal to a preset value, and the water temperature at the outlet of the motor is smaller than or equal to the preset outlet water temperature.
Specifically, after the motor residual heat heating is exited, the motor outlet water temperature and the battery temperature are continuously monitored, and when the entry condition that the motor residual heat heats the battery is met, namely the difference between the motor outlet water temperature and the battery temperature is larger than or equal to a preset value, and the motor outlet water temperature is smaller than or equal to a preset outlet water temperature, the step S212 is entered, and the motor residual heat heating is started; otherwise, the state of the motor heating by residual heat is continuously kept.
S216, the battery temperature is higher than the heating starting temperature, or the battery SOC value is lower than the SOC threshold value.
Specifically, during the battery heating process, the battery temperature and the battery SOC value are determined, if the battery temperature does not reach the target temperature, the process proceeds to step S203, the pulse heating of the battery is continuously started, and if the battery SOC value is smaller than the SOC threshold value, the process proceeds to step S217, in order to prevent the battery from over-discharging.
And S217, exiting the battery heating.
In the embodiment of the invention, the temperature of the battery is judged to be less than or equal to 5 ℃, the charging power of the battery is obviously reduced at the moment, the charging time is expected to reach 15h and far exceeds the requirement of low-temperature slow charging time, the SOC of the battery is more than or equal to 30%, the charging power of the battery is obviously reduced at the moment, the charging time is expected to reach 15h and far exceeds the requirement of low-temperature slow charging time, therefore, the battery is heated by adopting a battery pulse heating function, the SOC of the battery is gradually reduced along with the gradual rise of the temperature of the battery, and the battery pulse heating is quitted when the temperature of the battery reaches 10 ℃; under the working condition of quick charging, the limitation of charging power at 5 ℃ is obvious, (the temperature of 25 ℃ is the optimum charging temperature), the temperature rise is accelerated along with the charging power, and the pulse heating is stopped after 5 ℃; the temperature of the motor controller body and the temperature of the motor inlet are monitored, so that the interruption of the pulse heating function caused by the over-temperature in the pulse heating process is prevented, an electric control component is protected, when the temperature T of the water at the outlet of the motor is more than or equal to 5 ℃ and less than or equal to 45 ℃, the power consumption of pulse heating can be saved by heating the battery by using waste heat, the temperature rise rate can reach 0.2 ℃/min, and the electric quantity is saved by about 10%.
In the embodiment of the invention, under the condition that a vehicle is in a charging state, a battery heating mode is determined according to the battery temperature, the battery SOC value and the motor temperature parameter, the battery heating mode comprises battery pulse heating and/or motor waste heat heating, and the battery is controlled to be heated according to the battery heating mode, namely, according to the actual condition of the battery in the vehicle charging process, the battery heating mode is dynamically switched by adopting a proper battery heating mode, resources are fully utilized, and the battery heating efficiency under the charging condition is improved, so that the battery charging efficiency under the low-temperature limit condition is improved, the battery heating energy consumption is reduced, and the charging effect under the low-temperature condition is improved.
As shown in fig. 3, based on the above method for controlling battery heating, an embodiment of the present invention further provides a battery heating control apparatus, including:
the information acquisition module 301 is used for acquiring the battery temperature, the battery SOC value and the motor temperature parameter when the vehicle is in a charging state;
a mode determination module 302, configured to determine a battery heating mode according to the battery temperature, the battery SOC value, and the motor temperature parameter; the battery heating mode comprises battery pulse heating and/or motor waste heat heating;
and the control heating module 303 is used for controlling the battery to heat according to the battery heating mode.
In some embodiments, the determine mode module 302 includes:
the first mode module is used for determining to start the pulse heating of the battery if the temperature of the battery is less than or equal to a heating starting temperature and the SOC value of the battery is greater than or equal to a heating starting SOC value;
and the second mode module is used for determining to start the motor to heat by waste heat if the difference between the motor outlet water temperature and the battery temperature is greater than or equal to a preset value and the motor outlet water temperature is less than or equal to a preset outlet water temperature.
In some embodiments, controlling the heating module 303 comprises:
and the first control heating submodule is used for sending a first control signal to the motor controller if the battery heating mode is the battery pulse heating mode, and controlling the motor to output current waveform to perform pulse heating on the battery.
And the second control heating submodule is used for sending a second control signal to the air conditioner controller if the battery heating mode is heating by the waste heat of the motor, and controlling heat exchange between a refrigerant pipeline inside the battery and a cooling liquid pipeline to heat the battery.
According to the battery heating control device provided by the embodiment of the invention, when a vehicle is in a charging state, the battery temperature, the battery SOC value and the motor temperature parameter are obtained through the information obtaining module; the mode determining module is used for determining a battery heating mode according to the battery temperature and the battery SOC value, wherein the battery heating mode comprises battery pulse heating and/or motor waste heat heating; and controlling the heating module to control the battery to heat according to the battery heating mode. According to the embodiment of the invention, through the actual condition of the battery in the vehicle charging process, the proper battery heating mode is adopted, the battery heating mode is dynamically switched, the resource is fully utilized, and the battery heating efficiency under the charging condition is improved, so that the battery charging efficiency under the low-temperature limit condition is improved, the battery heating energy consumption is reduced, and the charging effect under the low-temperature condition is improved.
Based on the above method for controlling battery heating, an embodiment of the present invention further provides a vehicle, where the vehicle includes: the battery heating control device in the above step is used for executing the method of battery heating control in the above step.
It can be understood that the vehicle shown in the application can be vehicles of various types, and the battery heating control method provided by the application can be applied to the vehicles of various types, so that the battery heating control in the driving process is ensured, and the driving mileage of the vehicle is optimized.
It should be noted that the embodiments of the present invention are described with reference to methods and apparatuses according to the embodiments of the present invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions of a vehicle management system. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process or method that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process or method.
The embodiments of the present invention have been described in connection with the accompanying drawings, and the principles and embodiments of the present invention are described herein using specific examples, which are provided only to help understand the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. A battery heating control method, comprising:
when the vehicle is in a charging state, acquiring battery temperature, a battery SOC value and motor temperature parameters;
determining a battery heating mode according to the battery temperature, the battery SOC value and the motor temperature parameter; wherein the battery heating mode comprises battery pulse heating and/or motor waste heat heating;
and controlling the battery to heat according to the battery heating mode.
2. The method of claim 1, wherein the motor temperature parameters include a motor controller temperature, a motor inlet water temperature, and a motor outlet water temperature, and wherein determining a battery heating mode based on the battery temperature, a battery SOC value, and the motor temperature parameters comprises:
if the battery temperature is less than or equal to the heating starting temperature and the battery SOC value is greater than or equal to the heating starting SOC value, determining to start pulse heating of the battery;
and if the difference between the motor outlet water temperature and the battery temperature is greater than or equal to a preset value and the motor outlet water temperature is less than or equal to a preset outlet water temperature, determining to start the motor for waste heat heating.
3. The method of claim 2, wherein determining that the pulsed battery heating is initiated if the battery temperature is less than or equal to a warm-up initiation temperature and the battery SOC value is greater than or equal to a warm-up initiation SOC value comprises:
if the temperature of the motor controller is higher than a first preset temperature or the water temperature of the motor inlet is higher than the first preset inlet water temperature, the battery is withdrawn from pulse heating, and a motor water pump is controlled to be started to supply heat for the motor to dissipate;
and restarting the battery for pulse heating if the temperature of the motor controller is less than or equal to the second preset temperature and the water temperature of the motor inlet is less than or equal to the second preset inlet water temperature.
4. The method of claim 2, wherein determining that the pulsed battery heating is initiated if the battery temperature is less than or equal to a warm-up initiation temperature and the battery SOC value is greater than or equal to a warm-up initiation SOC value comprises:
when the temperature of the motor controller is smaller than or equal to the first preset temperature and the water temperature of the motor inlet is smaller than or equal to the first preset inlet water temperature, if the temperature difference of the battery is larger than the first preset temperature difference, the battery is withdrawn from pulse heating, the battery water pump is controlled to be started, and a preset temperature equalization strategy is executed; wherein the battery temperature difference is the difference value between the highest battery temperature and the lowest battery temperature;
and when the temperature difference of the battery is smaller than or equal to a second preset temperature difference, if the difference between the water temperature at the outlet of the motor and the temperature of the battery is larger than or equal to the preset value and the water temperature at the outlet of the motor is smaller than or equal to the preset outlet water temperature, determining to start the motor to heat by waste heat.
5. The method according to claim 2 or 4, wherein if the difference between the motor outlet water temperature and the battery temperature is greater than or equal to the preset value and the motor outlet water temperature is less than or equal to the preset outlet water temperature, after determining to start the motor residual heat heating, the method comprises:
if the difference between the water temperature at the outlet of the motor and the temperature of the battery is smaller than the preset value, the motor is quitted from heating by waste heat;
otherwise, restarting the motor to heat by using the residual heat.
6. The method of claim 5, wherein after the starting the motor waste heat heating, comprising:
if the battery temperature is less than or equal to the heating starting temperature and the battery SOC value is greater than or equal to the heating starting SOC value, determining to restart the pulse heating of the battery;
and if the battery temperature is higher than the heating starting temperature or the battery SOC value is lower than a preset SOC threshold value, the battery heating mode is exited.
7. The method of claim 1, wherein said controlling said battery to heat in accordance with said battery heating mode comprises:
if the battery heating mode is the battery pulse heating mode, a first control signal is sent to a motor controller, and the motor is controlled to output current waveforms to perform pulse heating on the battery.
8. The method of claim 1, wherein controlling the battery to heat in accordance with the battery heating mode comprises:
and if the battery heating mode is the heating by the waste heat of the motor, a second control signal is sent to the air conditioner controller to control the heat exchange between the refrigerant pipeline and the cooling liquid pipeline in the battery to heat the battery.
9. A battery heating control apparatus, comprising:
the information acquisition module is used for acquiring the battery temperature, the battery SOC value and the motor temperature parameter when the vehicle is in a charging state;
the mode determining module is used for determining a battery heating mode according to the battery temperature, the battery SOC value and the motor temperature parameter; wherein the battery heating mode comprises battery pulse heating and/or motor waste heat heating;
and the control heating module is used for controlling the battery to heat according to the battery heating mode.
10. A vehicle characterized by comprising the battery heating control apparatus according to claim 9.
CN202211238822.4A 2022-10-11 2022-10-11 Battery heating control method and device and vehicle Pending CN115571023A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116613402A (en) * 2023-07-17 2023-08-18 宁德时代新能源科技股份有限公司 Battery charging control method, system, device, equipment and storage medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116613402A (en) * 2023-07-17 2023-08-18 宁德时代新能源科技股份有限公司 Battery charging control method, system, device, equipment and storage medium

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