CN114497768B - Thermal management method and system of power battery and vehicle - Google Patents

Thermal management method and system of power battery and vehicle Download PDF

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Publication number
CN114497768B
CN114497768B CN202210080943.4A CN202210080943A CN114497768B CN 114497768 B CN114497768 B CN 114497768B CN 202210080943 A CN202210080943 A CN 202210080943A CN 114497768 B CN114497768 B CN 114497768B
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temperature
vehicle
battery
scene
temperature control
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CN114497768A (en
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刘阳
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Lantu Automobile Technology Co Ltd
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Lantu Automobile Technology Co Ltd
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    • 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
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • 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
    • H01M10/60—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Secondary Cells (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention discloses a thermal management method and system of a power battery and a vehicle, wherein the method comprises the following steps: monitoring state information of a current vehicle and environment information of the current vehicle; determining a current scene of the vehicle based on the state information and the environment information; and if the current scene belongs to the target scene, controlling the temperature of the power battery according to the current scene of the vehicle, the battery temperature of the current vehicle and the external environment temperature so as to adjust the battery temperature to be within the target temperature range, wherein the target scene comprises a scene for preparing parking and preserving heat and a scene for preparing super charging. The method can predict whether the vehicle is in a parking heat preservation scene or a super charging scene at present, so that the power battery can be pre-cooled or preheated in advance, the cooling pressure in the super quick charging process is greatly reduced, and the thermal management performance of the power battery of the vehicle is improved.

Description

Thermal management method and system of power battery and vehicle
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a thermal management method and system of a power battery and a vehicle.
Background
At present, the cooling of the power battery mainly adopts a water cooling/hydrothermal mode in the industry, and the cooling liquid is introduced into a liquid cooling water pipe or a liquid cooling plate runner at the bottom of the battery module, so that the heat of the high-temperature battery is taken away or the low-temperature battery is heated in a heat conduction mode. With the increasing requirements of the market on the charging speed of the automobile power battery, super fast charging has become the mainstream of the design of the following power battery. Super-fast charge generates more heat during charging than conventional fast charge schemes, and conventional cooling systems and cooling strategies have difficulty meeting the super-charge heat dissipation requirements. Meanwhile, as the requirements of the market on the battery performance are higher and higher, the service performance of the battery in a low-temperature environment is guaranteed to be an important task, and the low-temperature heat preservation is a special requirement, so that the requirement that the vehicle can still be normally used after the vehicle is stopped outside a cold room for 6-8 hours is met.
However, the conventional heat preservation method by the heat preservation material has limitations, and increases the weight and the whole package cost of the power battery.
Disclosure of Invention
The embodiment of the application provides a thermal management method and a thermal management system for a power battery and a vehicle, wherein the method can predict whether the vehicle is in a scene of preparing for stopping and preserving heat or a scene of preparing for super charging at present, so that the power battery can be pre-cooled or pre-heated in advance, the cooling pressure in the super quick charging process is greatly reduced, and the thermal management performance of the power battery of the vehicle is improved.
In a first aspect, the present invention provides, according to an embodiment of the present invention, the following technical solutions:
a method of thermal management of a power cell, comprising: monitoring state information of a current vehicle and environment information of the current vehicle; determining a current scene of the vehicle based on the state information and the environment information; and if the current scene belongs to the target scene, controlling the temperature of the power battery according to the current scene of the vehicle, the battery temperature of the current vehicle and the external environment temperature so as to adjust the battery temperature to be within the target temperature range, wherein the target scene comprises a scene for preparing parking and preserving heat and a scene for preparing super charging.
Preferably, the status information includes: the remaining amount of battery power and battery temperature, the environmental information includes: the distance between the vehicle and the super-charging station, based on the state information and the environment information, determines the current scene of the vehicle, including: if the battery power is lower than the preset power, the battery temperature is not in a preset safety temperature range, and the distance between the vehicle and the super-charging station is within a preset charging distance, determining that the current scene of the vehicle is a prepared super-charging scene.
Preferably, the status information includes: the remaining amount of battery power and battery temperature, the environmental information includes: the current environment temperature and the distance between the vehicle and the parking spot, and the current scene of the vehicle is determined based on the state information and the environment information, comprising: if the battery electric quantity is higher than the preset electric quantity, the difference between the battery temperature and the ambient temperature is higher than the preset temperature difference range, and the distance between the current vehicle and the parking point is within the preset parking distance, determining that the vehicle is in a scene of waiting for parking.
Preferably, the temperature control of the power battery according to the current scene, the current battery temperature of the vehicle and the external environment temperature includes: determining a temperature control mode and a temperature control level under the temperature control mode according to the current scene of the vehicle, the battery temperature of the current vehicle and the external environment temperature; if the temperature control mode is a cooling mode and the temperature control level is primary cooling, controlling a cooling fan to cool the power battery; if the temperature control mode is a cooling mode and the temperature control level is a secondary cooling mode, controlling the bottom liquid cooling plate to cool the power battery; if the temperature control mode is a cooling mode and the temperature control level is three-level cooling, controlling the top liquid cooling plate, the bottom liquid cooling plate and the cooling fan to cool the power battery; if the temperature control mode is a heating mode and the temperature control level is primary heating, controlling the bottom liquid cooling plate to heat the power battery; if the temperature control mode is a heating mode and the temperature control level is a secondary heating mode, the top liquid cooling plate and the bottom liquid cooling plate are controlled to heat the power battery.
Preferably, if the vehicle is in the ready-to-super-charge scene, determining the temperature control mode and the temperature control level in the temperature control mode according to the current scene of the vehicle, the current battery temperature of the vehicle and the external environment temperature comprises: comparing whether the difference value between the battery temperature of the vehicle and the external environment temperature is within a preset first temperature range, if so, determining that the temperature control mode is a cooling mode, and the temperature control level is primary cooling or secondary cooling; and comparing whether the difference value between the battery temperature of the vehicle and the external environment temperature is within a preset second temperature range, if so, determining that the temperature control mode is a heating mode, and the temperature control level is primary heating or secondary heating.
Preferably, if the vehicle is in a scene ready for parking and keeping warm, determining a temperature control mode and a temperature control level in the temperature control mode according to the current scene of the vehicle, the current battery temperature of the vehicle and the external environment temperature, including: if the external environment temperature is higher than the preset highest temperature, comparing whether the difference value between the battery temperature of the vehicle and the external environment temperature is in a preset third temperature range, if so, determining that the temperature control mode is a cooling mode, and the temperature control level is primary cooling; if the external environment temperature is less than the preset minimum temperature, comparing whether the difference between the battery temperature of the vehicle and the external environment temperature is within a preset fourth temperature range, if so, determining that the temperature control mode is a heating mode, and the temperature control level is primary heating.
Preferably, the method further comprises: if the current scene of the vehicle is a super charging scene, controlling the top liquid cooling plate, the bottom liquid cooling plate and the cooling fan to cool the power battery, and after the super charging scene is finished, controlling the bottom liquid cooling plate to cool the power battery; after the power battery enters trickle charge, whether the cooling fan is controlled to cool the power battery or whether the cooling fan is stopped is determined according to the difference value between the battery temperature of the vehicle and the external environment temperature.
In a second aspect, the present invention provides, according to an embodiment of the present invention, the following technical solutions:
a thermal management system for a power cell, the system comprising: the state monitor is used for monitoring the state information of the current vehicle and the environmental information of the current vehicle; the controller is connected with the state monitor and is used for determining the current scene of the vehicle based on the state information and the environment information; and if the current scene belongs to the target scene, controlling the temperature of the power battery according to the current scene of the vehicle, the battery temperature of the current vehicle and the external environment temperature so as to adjust the battery temperature to be within the target temperature range, wherein the target scene comprises a scene for preparing parking and preserving heat and a scene for preparing super charging.
Preferably, the system further comprises: the temperature controller comprises a top liquid cooling plate, a bottom liquid cooling plate and a cooling fan, wherein the top liquid cooling plate and the bottom liquid cooling plate are connected with the controller, the top liquid cooling plate is positioned at the top of the power battery and is used for heating or cooling the power battery, and the bottom liquid cooling plate is positioned at the bottom of the power battery and is used for heating or cooling the power battery; the cooling fan comprises a blowing fan and an exhaust fan, the blowing fan and the exhaust fan are connected with the controller, the blowing fan is located on the first side face of the power battery and used for blowing air into the power battery so as to cool the battery cell, and the exhaust fan is located on the opposite side face of the first side face and used for exhausting air in the power battery outwards so as to maintain air pressure balance in the power battery.
In a third aspect, the present application provides, according to an embodiment of the present application, the following technical solutions:
a vehicle, comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the thermal management method of the first aspect described above when the program is executed.
One or more technical solutions provided in the embodiments of the present application at least have the following technical effects or advantages:
the embodiment of the application provides a thermal management method and system for a power battery and a vehicle, wherein the method comprises the following steps: monitoring state information of a current vehicle and environment information of the current vehicle; determining a current scene of the vehicle based on the state information and the environment information; and if the current scene belongs to the target scene, controlling the temperature of the power battery according to the current scene of the vehicle, the battery temperature of the current vehicle and the external environment temperature so as to adjust the battery temperature to be within the target temperature range, wherein the target scene comprises a scene for preparing parking and preserving heat and a scene for preparing super charging. The method can predict whether the vehicle is in a thermal insulation scene to be parked or a super charging scene at present, so that the temperature of the power battery can be controlled in advance, namely, the battery is pre-cooled or preheated, the temperature of the battery is regulated to the target temperature, the cooling pressure in the super quick charging process is greatly reduced, and the thermal management performance of the power battery of the vehicle is improved. Furthermore, the system can not excessively consume the electric quantity of the whole vehicle while considering the super quick charge performance and the heat preservation performance of the battery, can not bring extra volume, weight and cost burden to the vehicle end, and is beneficial to maintaining the power economy of the whole vehicle and reducing carbon emission.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for thermal management of a power cell according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a thermal management system of a power battery according to an embodiment of the present invention;
FIG. 3 is a logic diagram of determining a vehicle preparation super-charge scenario according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a cooling fan in a power battery according to an embodiment of the present invention;
FIG. 5 is a logic diagram of determining a thermal insulation scene for a vehicle to park according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a thermal management device for a power battery according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a vehicle according to an embodiment of the present invention.
Detailed Description
The inventor has found that in the current vehicle power battery system on the market, the bottom liquid cooling/liquid heating scheme is general, and the conventional charge cooling strategy is: when the temperature of the battery is higher than T1, the flow rate and the temperature of the cooling liquid of the liquid cooling system at the bottom of the battery are increased, the battery is cooled at the target flow rate QL/min and the temperature T0, and then the cooling mode is exited when the temperature of the battery is reduced to T1-n ℃. The cooling method can meet the heat dissipation requirement in the quick-charging process when the cooling capacity of the whole vehicle air conditioning system is sufficient. However, in super fast charging, the heat generated is too large, so that the method cannot take enough heat away to lower the battery below the target temperature, and the temperature of the battery exceeds the limit value due to insufficient cooling, thereby causing functional and safety risks. Meanwhile, as all heating and heat dissipation actions of the system are carried out through the bottom liquid cooling plate, the temperature difference of different electric cores in the bag is difficult to control, and the safety and the service life of the battery are influenced.
In addition, the conventional heat preservation scheme relies on adding heat preservation materials to the battery pack or the module and the battery cells, so that heat loss is reduced, and the method has a certain effect, but the cost, the weight and the volume of the battery pack are increased. Meanwhile, the temperature difference problem of different battery cells in the package cannot be solved by the scheme, and when the temperature of a certain single battery cell in the package exceeds the application range, the whole package can also enter a performance limiting state.
Therefore, the embodiment of the application provides the thermal management method and the system for the power battery and the vehicle, and the method can predict whether the vehicle is in a parking heat preservation scene or a super charging scene at present, so that the power battery can be pre-cooled or pre-heated in advance, the cooling pressure in the super quick charging process is greatly reduced, and the thermal management performance of the power battery of the vehicle is improved.
The technical scheme of the embodiment of the application aims to solve the technical problems, and the overall thought is as follows:
a method of thermal management of a power cell, the method comprising: monitoring state information of a current vehicle and environment information of the current vehicle; determining a current scene of the vehicle based on the state information and the environment information; and if the current scene belongs to the target scene, controlling the temperature of the power battery according to the current scene, the battery temperature of the current vehicle and the external environment temperature so as to adjust the battery temperature to be within a target temperature range, wherein the target scene comprises a scene for preparing parking and preserving heat and a scene for preparing super charging.
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
In a first aspect, an embodiment of the present application provides a method for thermal management of a power battery, specifically, as shown in fig. 1, the method includes the following steps S101 to S103:
step S101, monitoring state information of a current vehicle and environment information of the current vehicle;
step S102, determining a current scene of the vehicle based on the state information and the environment information;
and step 103, if the current scene belongs to the target scene, controlling the temperature of the power battery according to the current scene, the battery temperature of the current vehicle and the external environment temperature so as to adjust the battery temperature to be within the target temperature range, wherein the target scene comprises a parking preparation heat preservation scene and a super charging preparation scene.
In a specific embodiment, the thermal management method is applied to a thermal management system of a power battery, as shown in fig. 2, the thermal management system of a power battery provided by the application may include: a state monitor 101 for monitoring state information of a current vehicle and environmental information in which the current vehicle is located; and the controller 102 is connected with the state monitor 101 and is used for determining a current scene of the vehicle based on the state information and the environment information, and if the current scene belongs to a target scene, controlling the temperature of the power battery according to the current scene of the vehicle, the battery temperature of the current vehicle and the external environment temperature so as to adjust the battery temperature to be within a target temperature range, wherein the target scene comprises a scene for preparing parking and heat preservation and a scene for preparing super charging.
It should be noted that, the scenario of parking-ready thermal insulation here indicates that the vehicle will park after a preset period of time at the current time, for example, the preset period of time is 5 minutes to 10 minutes, and the vehicle will park after 5 minutes to 10 minutes at the current time. Preparing the super-charge scenario indicates that the vehicle will super-charge after 5 minutes to 10 minutes at the current time.
As an alternative embodiment, as shown in fig. 2, the state detector 101 may include: the battery temperature sensor, the battery power sensor, the ambient temperature sensor and the GPS positioning sensor are all connected with the controller 102.
Specifically, a battery temperature sensor is used to detect battery temperature, a battery power sensor is used to detect battery remaining amount, an ambient temperature sensor is used to detect temperature information outside the vehicle environment, a global positioning system (Global Positioning System, GPS) positioning sensor is used to detect the geographic location of the current vehicle, and ambient information around the current vehicle. Based on the environmental information around the vehicle, the distance of the vehicle from the charging station, the distance of the vehicle from the parking spot, the distance of the vehicle from the gas station, and the like can be determined.
The GPS positioning sensor can be arranged on the outer side or the inner side of the vehicle to position the vehicle.
As an alternative embodiment, the status information of the vehicle may include: the remaining amount of battery power and the battery temperature, the environmental information may include: distance of the vehicle from the overcharge station. As shown in fig. 3, determining a current scene in which the vehicle is located based on the state information and the external environment information may include: if the State of charge (SOC) of the battery is lower than the preset power X1, the battery temperature C is not within the preset safe temperature range, and the distance S between the current vehicle and the super-charging station is within the preset charging distance, it is determined that the vehicle is currently in the ready super-charging scene. Of course, the distance S here may also be the distance of the vehicle from the charging station.
Specifically, when it is determined that the battery SOC of the current vehicle, the battery temperature C, and the distance S between the vehicle and the super-charging station all satisfy the respective determination conditions, it is determined that the vehicle is to be ready for super-charging. For example, if the battery SOC is lower than 20% or the battery SOC is between 10% and 20%, the battery temperature C is greater than 50 ℃ and less than 25 ℃, and the distance S between the vehicle and the super-charging station is less than or equal to 3KM, then it may be determined that the current vehicle is ready for the super-charging scenario.
Further, in order to more accurately determine the current scene of the vehicle, the state monitor may further include: and the GPS network time sub-module is used for acquiring the date and time in real time.
In a specific embodiment, the status information of the vehicle may include: the battery SOC, battery temperature, and date and time, the environmental information may include: distance of the vehicle from the overcharge station. As shown in fig. 3, determining, based on the state information and the environmental information, a scene in which the vehicle is currently located may include: if the State of charge (SOC) of the battery is lower than the preset power X1, the battery temperature C is not within the preset safe temperature range, the distance S between the current vehicle and the super-charging station is within the preset charging distance, and the current date and time are within the preset standard time, it is determined that the vehicle is currently in the ready super-charging scene.
Specifically, when it is determined that the battery SOC of the current vehicle, the battery temperature C, the distance between the vehicle and the overcharge station, and the current date and time all satisfy the respective determination conditions, it is determined that the vehicle is to be ready for overcharge. Here, the date and time reflect the charging habit of the user, the endurance of the vehicle, etc., and the preset standard time represents a fixed time range at a uniform interval period preset by the user, for example, 5 pm to 8 pm on wednesday and wednesday, or 7 am to 10 am on monday and thursday, etc.
For example, if the battery SOC is lower than 20% or the battery SOC is 10% -20%, the battery temperature C is 50 ℃ or lower than 25 ℃, and the distance S between the vehicle and the overcharge station is 3KM or lower, the current date and time is 8 am on monday, and the current vehicle may be determined to be ready for the overcharge scenario.
Further, in order to more accurately determine the current scene of the vehicle, the state monitor may further include: the command obtaining sub-module is configured to obtain a command received by the current vehicle, for example: the instructions may be user instructions as well as instructions generated by program execution. In the embodiment of the present application, the command acquiring sub-module may be used only for acquiring the user command.
If the State of charge (SOC) of the battery is lower than the preset power X1, the battery temperature C is not within the preset safe temperature range, the distance S between the current vehicle and the overcharge station is within the preset charging distance, the current date and time are within the preset standard time, and when the overcharge instruction sent by the user is received, it is determined that the vehicle is currently in the ready-to-overcharge scene.
As an alternative embodiment, as shown in fig. 5, the status information may include: the battery SOC and the battery temperature, the environmental information may further include: the determining, based on the state information and the environmental information, a current scene in which the vehicle is located may include: if the battery SOC is higher than the preset electric quantity X2, the difference between the battery temperature C and the ambient temperature is higher than the preset temperature difference range, and the distance Y between the current vehicle and the parking spot is within the preset parking distance, determining that the vehicle is currently in a scene of preparing to park for heat preservation.
Specifically, when it is determined that the battery SOC of the current vehicle, the difference between the battery temperature C and the ambient temperature, and the distance Y between the vehicle and the parking spot all satisfy the respective judgment conditions, it is determined that the vehicle is to be ready for a parking heat preservation scene. For example, the preset electric quantity X2 is 30% of the total electric quantity of the battery, the preset temperature difference range is 5 ℃, the preset parking distance is 3KM, and when the battery SOC is greater than or equal to 30%, the difference between the battery temperature and the external environment temperature is greater than or equal to 5 ℃, and the distance S between the vehicle and the parking spot is less than or equal to 3KM, it may be determined that the current vehicle is ready for the super-charging scenario.
Further, in order to more accurately determine the current scene of the vehicle, the state information may further include: as shown in fig. 5, determining, based on the state information and the environmental information, a scene in which the vehicle is currently located may include: if the battery SOC is higher than the preset electric quantity X2, the difference between the battery temperature C and the ambient temperature is higher than the preset temperature difference range, the distance Y between the current vehicle and the parking spot is within the preset parking distance, the date and time are within the preset standard time, and a parking instruction sent by a user is received, the current situation that the vehicle is in a scene of waiting for parking and heat preservation is determined.
It should be noted that, the date and time herein reflect the parking habit of the user, and the preset standard time represents a fixed time range at a uniform interval period preset by the user, for example, 7 am to 9 am, 5 pm to 8 pm, and so on monday to friday weekly. The user instruction information indicates a control instruction issued by the user before the user is ready to park.
In a specific embodiment, as shown in fig. 2, the thermal management system provided by the present application may further include: the temperature controller 103, the temperature controller 103 includes top liquid cooling board (upper portion liquid cooling board), bottom liquid cooling board and cooling fan, and top liquid cooling board and bottom liquid cooling board all are connected with the controller, and the top liquid cooling board is located the power battery top for heat or cool down power battery, and the bottom liquid cooling board is located the power battery bottom for heat or cool down power battery.
Specifically, as shown in fig. 4, the cooling fans may include a blower fan 1041 and an exhaust fan 1042, where the blower fan 1041 and the exhaust fan 1042 are connected to the controller, the blower fan 1041 is located on a first side of the power battery and configured to blow air into the power battery to cool the battery cell, and the exhaust fan 1042 is located on an opposite side of the first side and configured to exhaust air in the power battery to maintain air pressure balance in the power battery.
The temperature control of the power battery according to the current scene, the battery temperature of the current vehicle and the external environment temperature may include: determining a temperature control mode and a temperature control level under the temperature control mode according to the current scene of the vehicle, the battery temperature of the current vehicle and the external environment temperature; if the temperature control mode is a cooling mode and the temperature control level is primary cooling, controlling a cooling fan to cool the power battery; if the temperature control mode is a cooling mode and the temperature control level is a secondary cooling mode, controlling the bottom liquid cooling plate to cool the power battery; if the temperature control mode is a cooling mode and the temperature control level is three-level cooling, controlling the top liquid cooling plate, the bottom liquid cooling plate and the cooling fan to cool the power battery; if the temperature control mode is a heating mode and the temperature control level is primary heating, controlling the bottom liquid cooling plate to heat the power battery; if the temperature control mode is a heating mode and the temperature control level is a secondary heating mode, the top liquid cooling plate and the bottom liquid cooling plate are controlled to heat the power battery.
The application is obtained by cooling experiments of the power battery: the cooling capacity of the cooling fan to the power battery accounts for 0-10%, basic cooling can be realized, the cooling capacity of the bottom liquid cooling plate to the power battery accounts for 10-50%, more heat can be realized, the cooling capacity of the bottom liquid cooling plate, the top liquid cooling plate and the cooling fan to the power battery accounts for 50-100%, and large-range higher heat cooling can be realized.
Therefore, based on different acquired scenes, the application can obtain the optimal operation mode (cooling mode or heating mode, primary cooling, secondary cooling or tertiary cooling in the cooling mode and primary heating or secondary heating in the heating mode) of the thermal management system controller according to the control specifications corresponding to the scenes, the battery temperature of the current vehicle and the external environment temperature, so that the vehicle can operate in the optimal state in different states without greatly reducing the energy use efficiency of the whole vehicle.
In addition, the secondary cooling (the bottom liquid cooling plate cools the power battery) provided by the application can represent a uniform cooling mode, and the temperature controller can cool the power battery more uniformly in the mode; the soaking mode can be represented by the secondary heating (the bottom liquid cooling plate and the top liquid cooling plate are used for heating the power battery), the temperature controller can uniformly heat the power battery in the soaking mode, and the temperature controller in the soaking mode or the soaking mode has a good uniform temperature control effect, so that the temperature control efficiency is improved.
Based on different usage scenarios, the design control scheme is as follows:
as an alternative embodiment, if the vehicle is in the ready-to-super-charge scene, determining the temperature control mode and the temperature control level in the temperature control mode according to the current scene, the battery temperature of the current vehicle and the external environment temperature may include: comparing whether the difference between the battery temperature C1 of the vehicle and the external environment temperature C2 is within a preset first temperature range F1, if so, determining that the temperature control mode is a cooling mode, and the temperature control level is primary cooling or secondary cooling; and comparing whether the difference between the battery temperature C1 of the vehicle and the external environment temperature C2 is within a preset second temperature range F2, if so, determining that the temperature control mode is a heating mode, and the temperature control level is primary heating or secondary heating.
The preset first temperature range F1 and the preset second temperature range F2 may be set values, for example, the preset first temperature range F1 may be-5 to-10 ℃, and the preset second temperature range F2 may be 5 to 20 ℃.
Specifically, when the controller recognizes that the vehicle is about to be super-charged, it enters a pre-charge pre-cooling/pre-heating mode in which it is determined that the temperature controller enters level 1 or level 2 cooling/heating according to a difference between the external ambient temperature and the current temperature of the battery, controls the battery temperature within a super-charge initiation range (i.e., within a target temperature range), and maintains the coolant temperature at an appropriate temperature.
It should be noted that, the super-charge start range herein means an optimal start temperature range of the power battery before the vehicle is super-charged, and the super-charge start range may be 25-26 ℃.
Specifically, if the current external environment temperature C2 is 40 ℃, and the battery temperature C1 is 30 ℃, the difference between the battery temperature C1 and the external environment temperature C2 is-10 ℃, so that the difference is within the preset first temperature range F1, the temperature control mode of the controller is determined to be a cooling mode, and the temperature control level can be two-stage cooling; if the current external environment temperature C2 is 35 ℃ and the battery temperature C1 is 30 ℃, the difference between the battery temperature C1 and the external environment temperature C2 is-5 ℃, the temperature control mode of the controller is determined to be a cooling mode, and the temperature control level can be primary cooling, so that the temperature of the power battery is in the super-charging initial range.
If the current external environment temperature is C3 and C1 is 10 ℃ and the battery temperature is C1 and C2 is 30 ℃, the difference between the battery temperature C1 and the external environment temperature C2 is 20 ℃, so that the difference is within a preset second temperature range F2, the temperature control mode of the controller is determined to be a heating mode, and the temperature control level can be two-stage heating; if the current external environment temperature is 20 ℃ and the battery temperature is 30 ℃, the difference between the battery temperature C1 and the external environment temperature C2 is 10 ℃, the temperature control mode of the controller is determined to be a heating mode, and the temperature control level can be primary heating, so that the temperature of the power battery is in the super-charging initial range.
In a specific embodiment, the method for thermal management of a power battery provided by the application may further include: if the current scene of the vehicle is a super charging scene, controlling the top liquid cooling plate, the bottom liquid cooling plate and the cooling fan to cool the power battery, and after the super charging scene is finished, controlling the bottom liquid cooling plate to cool the power battery; after the power battery enters trickle charge, whether the cooling fan is controlled to cool the power battery or whether the cooling fan is stopped is determined according to the difference value of the battery temperature of the vehicle and the external environment temperature. The trickle charge is used to compensate for the capacity loss of the battery caused by self-discharge after the battery is fully charged, and can be represented as a super-charge ending stage.
Specifically, when the super fast charge working condition starts, the controller controls the top liquid cooling plate, the bottom liquid cooling plate and the cooling fan to cool the power battery, so that a full-power cooling mode is directly started, the temperature rise speed of the battery in the fast charge process is pressed to be slowest, after the super fast charge scene is finished, the bottom liquid cooling plate is controlled to cool the power battery, and after the battery enters a high SOC trickle charge mode, whether the cooling fan is controlled to cool the power battery or whether the cooling fan is stopped is determined.
The controller can judge whether the current controller controls the cooling fan to cool the power battery or whether the current controller exits the cooling according to the difference between the battery temperature of the vehicle and the external environment temperature. For example, if the difference between the external ambient temperature and the battery temperature is 10 ℃, it means that the external ambient temperature is high, the cooling fan needs to be controlled to cool the power battery, so that the power battery after the cooling mode can maintain a low temperature for a certain period of time.
Of course, as another alternative embodiment, the controller controls the top liquid cooling plate, the bottom liquid cooling plate and the cooling fan to cool the power battery, after the super fast charging scene is finished, the controller can also maintain a preset time period, then control the bottom liquid cooling plate to cool the power battery, and after the battery enters the high-SOC trickle charge, enter the controller to control the cooling fan to cool or exit the cooling fan to cool the power battery. Or the controller controls the top liquid cooling plate, the bottom liquid cooling plate and the cooling fan to cool the power battery, and after the super fast charging scene is finished, the controller directly controls the bottom liquid cooling plate to cool the power battery, and after the battery enters the high-SOC trickle charge, the battery is cooled.
As an alternative embodiment, if the vehicle is in a scene ready for parking and keeping warm, determining a temperature control mode and a temperature control level in the temperature control mode according to a current scene, a battery temperature of the current vehicle and an external environment temperature, including: if the external environment temperature C2 is higher than the preset highest temperature C5, comparing whether the difference between the battery temperature C1 of the vehicle and the external environment temperature C2 is in a preset third temperature range, if so, determining that the temperature control mode is a cooling mode, and the temperature control level is primary cooling; if the external environment temperature C2 is smaller than the preset minimum temperature C6, comparing whether the difference between the battery temperature C1 of the vehicle and the external environment temperature C2 is within a preset fourth temperature range, if so, determining that the temperature control mode is a heating mode, and the temperature control level is primary heating.
The preset maximum temperature C5, the preset minimum temperature C6, the preset third temperature range and the preset fourth temperature range are all set values, for example, the preset maximum temperature C5 may be 35 ℃, the preset minimum temperature may be 10 ℃, the preset third temperature range may be 10-30 ℃, and the preset fourth temperature range may be 5-15 ℃.
Specifically, when the controller recognizes that the vehicle is in a thermal insulation scene ready to stop, if the battery temperature is in a normal range and the external environment temperature is extremely low, and the difference between the battery temperature C1 of the vehicle and the external environment temperature C2 is in a preset third temperature range, the controller sends a primary heating request to the temperature controller to raise the battery temperature to a target temperature. For example, the target temperature may be in the range of 5-10 ℃ higher than the temperature of the current power battery, and after the target temperature is reached, the soaking mode is started to uniformly and balance the temperatures of different battery cells in the battery pack, so as to reduce the temperature difference.
For example, the battery temperature is within the normal range of 25-30 ℃, the external ambient temperature is 8 ℃, the difference is 17-22 ℃ and the temperature is within the preset third temperature range, so the controller sends a primary heating request to the temperature controller to raise the battery temperature to the target temperature, i.e. the battery temperature is raised from 25-30 ℃ to 30-35 ℃. Therefore, even if the temperature of the external environment of the vehicle is lower, the temperature of the power battery can still maintain a higher temperature level within a certain time, so that the heat preservation of the power battery is realized, the cold start problem can be effectively avoided, and the energy consumption is reduced.
If the battery temperature is in the normal range and the external environment temperature is extremely high at this time, and the difference between the battery temperature C1 of the vehicle and the external environment temperature C2 is in the preset fourth temperature range, the controller sends a primary cooling request to the temperature controller to reduce the battery temperature to the target temperature. For example, the target temperature may be within 5-10 ℃ lower than the temperature of the current power battery, and after the target temperature is reached, the cooling mode is started to uniformly and balance the temperatures of different battery cells in the battery pack, so as to reduce the temperature difference.
For example, the battery temperature is within the normal range of 25-30 ℃ and the external ambient temperature is 37 ℃, then the difference is 7-12 ℃ within the preset fourth temperature range, so the controller sends a primary cooling request to the temperature controller to reduce the battery temperature to the target temperature, i.e., from 25-30 ℃ to 20-25 ℃. Therefore, even if the temperature of the external environment of the vehicle is higher, the temperature of the power battery can still maintain a lower temperature level within a certain time, so that the heat preservation of the power battery is realized, and the performance of the power battery can be effectively stabilized.
Therefore, through the two pre-cooling modes and the pre-heating mode, the power battery thermal management method provided by the application has higher economical efficiency and better thermal insulation effect compared with the conventional battery pack thermal insulation scheme.
Further, in order to better stabilize the temperature of the power battery, the heat insulation effect of the power battery is better, and after the user stops (parks) the vehicle, the user can keep the water pump running for a preset running time period, for example, the preset running time period can be 5 minutes. The water pump does not use a high-voltage battery loop but a low-voltage loop, so that the static of a user is not influenced.
It should be noted that, because the performance of the battery is limited in low-temperature and high-temperature environments, the dischargeable electric quantity is also affected, so it is particularly important to control the temperature of the battery to be within a reasonable range within a certain period of time under the sleeping condition after the user finishes using the vehicle.
Therefore, the thermal management method for the power battery provided by the application has the advantages that the charging scene of a user is reasonably identified, the battery is pre-cooled or preheated before super charging of the user, meanwhile, the thermal management method is provided for the heat preservation requirement of extreme environment temperature, the super quick charging performance and the heat preservation performance of the battery are considered, the electric quantity of the whole vehicle is not excessively consumed, the extra volume, the weight and the cost burden are not brought to the vehicle end, and the maintenance of the power economy of the whole vehicle and the reduction of carbon emission are facilitated. Meanwhile, the thermal management system can develop more using strategies suitable for various vehicle working conditions based on the control framework and strategies, for example: in a specific embodiment, the vehicle can not start thermal management or primary heating or cooling under the common working condition, and can start tertiary cooling or secondary heating under the extreme working condition, so that the energy consumption of the whole vehicle in a thermal management part can be reduced while the performance target is realized.
In summary, by the method for thermal management of the power battery provided by the embodiment of the invention, whether the vehicle is in a parking heat preservation scene or a super charging scene at present can be predicted, so that the power battery can be pre-cooled or pre-heated in advance, the cooling pressure in the super fast charging process is greatly reduced, and the thermal management performance of the power battery of the vehicle is improved.
In a second aspect, based on the same inventive concept, the present embodiment provides a thermal management device of a power battery, as shown in fig. 6, the device including:
the monitoring module 401 is configured to monitor state information of a current vehicle and environmental information of the current vehicle;
a scene determination module 402, configured to determine a scene in which the vehicle is currently located based on the state information and the environmental information;
and the temperature control module 403 is configured to control the temperature of the power battery according to the current scene, the battery temperature of the current vehicle, and the external environment temperature if the current scene belongs to the target scene, so as to adjust the battery temperature to be within the target temperature range, where the target scene includes a scene for preparing parking and heat preservation and a scene for preparing super charging.
As an alternative embodiment, the scene determining module 402 is specifically configured to: if the battery power is lower than the preset power, the battery temperature is not in a preset safety temperature range, and the distance between the vehicle and the super-charging station is within a preset charging distance, determining that the current scene of the vehicle is a prepared super-charging scene.
As an alternative embodiment, the scene determining module 402 is specifically configured to: if the battery electric quantity is higher than the preset electric quantity, the difference between the battery temperature and the ambient temperature is higher than the preset temperature difference range, and the distance between the current vehicle and the parking point is within the preset parking distance, determining that the vehicle is in a scene of waiting for parking.
As an alternative embodiment, the temperature control module 403 includes:
the temperature control mode determining submodule is used for determining a temperature control mode and a temperature control level under the temperature control mode according to the current scene of the vehicle, the current battery temperature of the vehicle and the external environment temperature;
the temperature control level determining submodule is used for controlling the cooling fan to cool the power battery if the temperature control mode is a cooling mode and the temperature control level is primary cooling; if the temperature control mode is a cooling mode and the temperature control level is a secondary cooling mode, controlling the bottom liquid cooling plate to cool the power battery; if the temperature control mode is a cooling mode and the temperature control level is three-level cooling, controlling the top liquid cooling plate, the bottom liquid cooling plate and the cooling fan to cool the power battery; if the temperature control mode is a heating mode and the temperature control level is primary heating, controlling the bottom liquid cooling plate to heat the power battery; if the temperature control mode is a heating mode and the temperature control level is a secondary heating mode, the top liquid cooling plate and the bottom liquid cooling plate are controlled to heat the power battery.
As an alternative embodiment, the temperature control mode determining submodule is specifically configured to: comparing whether the difference value between the battery temperature of the vehicle and the external environment temperature is within a preset first temperature range, if so, determining that the temperature control mode is a cooling mode, and the temperature control level is primary cooling or secondary cooling; and comparing whether the difference value between the battery temperature of the vehicle and the external environment temperature is within a preset second temperature range, if so, determining that the temperature control mode is a heating mode, and the temperature control level is primary heating or secondary heating.
As an alternative embodiment, the temperature control mode determining submodule is further specifically configured to: if the external environment temperature is higher than the preset highest temperature, comparing whether the difference value between the battery temperature of the vehicle and the external environment temperature is in a preset third temperature range, if so, determining that the temperature control mode is a cooling mode, and the temperature control level is primary cooling; if the external environment temperature is less than the preset minimum temperature, comparing whether the difference between the battery temperature of the vehicle and the external environment temperature is within a preset fourth temperature range, if so, determining that the temperature control mode is a heating mode, and the temperature control level is primary heating.
As an alternative embodiment, the temperature control mode determining submodule is further specifically configured to: if the current scene of the vehicle is a super charging scene, controlling the top liquid cooling plate, the bottom liquid cooling plate and the cooling fan to cool the power battery, and after the super charging scene is finished, controlling the bottom liquid cooling plate to cool the power battery; after the power battery enters trickle charge, whether the cooling fan is controlled to cool the power battery or whether the cooling fan is stopped is determined according to the difference value between the battery temperature of the vehicle and the external environment temperature.
The heat management device for a power battery provided by the embodiment of the invention has the same implementation principle and technical effects as those of the embodiment of the method, and for the sake of brevity, reference may be made to the corresponding content in the embodiment of the method.
In a fourth aspect, based on the same inventive concept, the present embodiment provides a vehicle 500, as shown in fig. 7, including: a memory 501, a processor 502 and a computer program 503 stored on the memory and executable on the processor, said processor 502 implementing the steps of the method for thermal management of a power cell according to the first aspect described above when said program is executed.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the 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. 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 apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, 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 stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function 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 apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus 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 in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (9)

1. A method of thermal management of a power cell, the method comprising:
Monitoring state information of a current vehicle and environment information of the current vehicle;
determining a current scene of the vehicle based on the state information and the environment information;
if the current scene of the vehicle belongs to a target scene, controlling the temperature of a power battery according to the current scene, the battery temperature of the vehicle and the external environment temperature so as to adjust the battery temperature to be within a target temperature range, wherein the target scene comprises a parking preparation heat preservation scene and a super charging preparation scene; the temperature control of the power battery according to the current scene, the current battery temperature of the vehicle and the external environment temperature comprises the following steps: determining a temperature control mode and a temperature control level in the temperature control mode according to the current scene of the vehicle, the battery temperature of the current vehicle and the external environment temperature, wherein the temperature control mode comprises a cooling mode and a heating mode, and when the temperature control level is primary cooling, a cooling fan is controlled to cool the power battery;
if the current scene of the vehicle is a super charging scene, controlling a top liquid cooling plate, a bottom liquid cooling plate and a cooling fan to cool the power battery, and controlling the bottom liquid cooling plate to cool the power battery after the super charging scene is finished;
After the power battery enters trickle charge, determining whether to control the cooling fan to cool the power battery or whether to exit cooling according to the difference value of the battery temperature of the vehicle and the external environment temperature.
2. The thermal management method of claim 1, wherein the status information comprises: the remaining battery power and the battery temperature, the environmental information includes: the distance between the vehicle and the super-charging station, the determining the current scene of the vehicle based on the state information and the environment information includes:
if the battery power is lower than the preset power, the battery temperature is not in a preset safety temperature range, and the distance between the vehicle and the super-charging station is within a preset charging distance, determining that the current scene of the vehicle is the scene for preparing super-charging.
3. The thermal management method of claim 1, wherein the status information comprises: the remaining battery power and the battery temperature, the environmental information includes: the determining, based on the state information and the environmental information, a current scene in which the vehicle is located includes:
If the battery electric quantity is higher than the preset electric quantity, the difference between the battery temperature and the environment temperature is higher than a preset temperature difference range, and the distance between the current vehicle and the parking point is within a preset parking distance, determining that the vehicle is currently in a scene of waiting for parking and heat preservation.
4. The thermal management method of claim 1, comprising:
if the temperature control mode is a cooling mode and the temperature control level is a secondary cooling mode, controlling a bottom liquid cooling plate to cool the power battery;
if the temperature control mode is a cooling mode and the temperature control level is three-level cooling, controlling a top liquid cooling plate, a bottom liquid cooling plate and a cooling fan to cool the power battery;
if the temperature control mode is a heating mode and the temperature control level is primary heating, controlling the bottom liquid cooling plate to heat the power battery;
and if the temperature control mode is a heating mode and the temperature control level is a secondary heating mode, controlling the top liquid cooling plate and the bottom liquid cooling plate to heat the power battery.
5. The method of thermal management according to claim 4, wherein if the vehicle is in the ready-to-super-charge scenario, determining a temperature control mode and a temperature control level in the temperature control mode based on a current scenario in which the vehicle is located, a current battery temperature of the vehicle, and an external ambient temperature, comprises:
Comparing whether the difference value between the battery temperature of the vehicle and the external environment temperature is within a preset first temperature range, if so, determining that the temperature control mode is a cooling mode, and the temperature control level is primary cooling or secondary cooling;
and comparing whether the difference value between the battery temperature of the vehicle and the external environment temperature is within a preset second temperature range, if so, determining that the temperature control mode is a heating mode, and the temperature control level is primary heating or secondary heating.
6. The method of thermal management according to claim 4, wherein if the vehicle is in the ready-to-park thermal scene, determining a temperature control mode and a temperature control level in the temperature control mode based on a current scene in which the vehicle is located, a current battery temperature of the vehicle, and an external ambient temperature, comprises:
if the external environment temperature is higher than the preset highest temperature, comparing whether the difference value between the battery temperature of the vehicle and the external environment temperature is in a preset third temperature range, if so, determining that the temperature control mode is a cooling mode, and the temperature control level is primary cooling;
if the external environment temperature is smaller than the preset minimum temperature, comparing whether the difference value between the battery temperature of the vehicle and the external environment temperature is within a preset fourth temperature range, if so, determining that the temperature control mode is a heating mode, and the temperature control level is primary heating.
7. A thermal management system for a power cell, the system comprising:
the state monitor is used for monitoring the state information of the current vehicle and the environmental information of the current vehicle;
the controller is connected with the state monitor and is used for determining the current scene of the vehicle based on the state information and the environment information; if the current scene belongs to a target scene, controlling the temperature of a power battery according to the current scene of the vehicle, the battery temperature of the current vehicle and the external environment temperature so as to adjust the battery temperature to be within a target temperature range, wherein the target scene comprises a parking preparation heat preservation scene and a super charging preparation scene;
the temperature control of the power battery according to the current scene, the current battery temperature of the vehicle and the external environment temperature comprises the following steps: determining a temperature control mode and a temperature control level in the temperature control mode according to the current scene of the vehicle, the battery temperature of the current vehicle and the external environment temperature, wherein the temperature control mode comprises a cooling mode and a heating mode, and when the temperature control level is primary cooling, a cooling fan is controlled to cool the power battery;
If the current scene of the vehicle is a super charging scene, controlling a top liquid cooling plate, a bottom liquid cooling plate and a cooling fan to cool the power battery, and controlling the bottom liquid cooling plate to cool the power battery after the super charging scene is finished;
after the power battery enters trickle charge, determining whether to control the cooling fan to cool the power battery or whether to exit cooling according to the difference value of the battery temperature of the vehicle and the external environment temperature.
8. The thermal management system of claim 7, wherein the system further comprises:
the temperature controller comprises a top liquid cooling plate, a bottom liquid cooling plate and a cooling fan, wherein the top liquid cooling plate and the bottom liquid cooling plate are connected with the controller, the top liquid cooling plate is positioned at the top of the power battery and is used for heating or cooling the power battery, and the bottom liquid cooling plate is positioned at the bottom of the power battery and is used for heating or cooling the power battery;
the cooling fan comprises a blowing fan and an exhausting fan, wherein the blowing fan and the exhausting fan are both connected with the controller, the blowing fan is located on the first side face of the power battery and used for blowing air into the power battery so as to cool the battery cells of the power battery, and the exhausting fan is located on the opposite side face of the first side face and used for exhausting air in the power battery outwards so as to maintain air pressure balance in the power battery.
9. A vehicle, characterized by comprising: memory, a processor and a computer program stored on the memory and executable on the processor, which processor implements the steps of the method of any one of claims 1-6 when the program is executed.
CN202210080943.4A 2022-01-24 2022-01-24 Thermal management method and system of power battery and vehicle Active CN114497768B (en)

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CA2648972A1 (en) * 2007-12-24 2009-06-24 Yaron Mayer System and method for improved electric cars and/or electric car batteries and/or improved infrastructures for recharging electric cars
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