WO2023093209A1

WO2023093209A1 - Battery temperature control method and apparatus, storage medium, and computer device

Info

Publication number: WO2023093209A1
Application number: PCT/CN2022/117575
Authority: WO
Inventors: 倪瑞林; 曲宏鹏; 武橦; 黄贤辉
Original assignee: 三一重型装备有限公司
Priority date: 2021-11-29
Filing date: 2022-09-07
Publication date: 2023-06-01
Also published as: CN114335792B; CN114335792A

Abstract

The present application relates to the technical field of batteries, and discloses a battery temperature control method and apparatus, a storage medium, and a computer device, mainly aiming to improve the precision of battery temperature control and reduce energy consumption of a thermal management system for controlling the battery temperature. The method comprises: obtaining a temperature value corresponding to each battery in a battery pack, and obtaining an actual temperature of a cooling liquid in a thermal management system for controlling the battery temperature; determining a target temperature value of the cooling liquid in the thermal management system on the basis of the temperature value corresponding to each battery; determining a next working mode of the thermal management system according to the actual temperature, the target temperature value, and a current working mode of the thermal management system; and controlling the battery temperature on the basis of the next working mode. The present application is suitable for controlling the battery temperature.

Description

Battery temperature control method, device, storage medium and computer equipment

Cross References to Related Applications

This application claims the priority of the Chinese patent application with application number 202111431854.1 and titled “Battery Temperature Control Method, Device, Storage Medium, and Computer Equipment” filed on November 29, 2021, which is incorporated herein by reference in its entirety.

technical field

The present application relates to the technical field of batteries, in particular to a battery temperature control method, device, storage medium and computer equipment.

Background technique

Pure electric wide-body vehicle is an important mine transportation equipment. The battery pack is the power source of the electric wide-body vehicle. The temperature should not be too high during operation, otherwise it will affect the service life of the battery. In severe cases, thermal runaway will cause the battery Failure will affect driving safety. Therefore, in order to ensure driving safety, it is necessary to adjust the working mode of the battery thermal management system to control the battery temperature.

At present, the working mode of the thermal management system is usually adjusted according to the temperature of the battery pack, so as to control the battery temperature. However, the adjustment of the working mode of the thermal management system is not only based on the temperature of the battery pack, but also the current working mode of the thermal management system. This method of adjusting the working mode of the thermal management system only based on monitoring the temperature of the battery pack, when the temperature of the battery is slightly higher At this time, the air-conditioning system in the thermal management system will be directly turned on for cooling. However, if the air-conditioning is not turned on at this time, the battery can also be cooled only based on the current self-circulation mode of the thermal management system. Therefore, only based on the temperature of the battery pack, it cannot Effectively adjust the working mode of the thermal management system, resulting in low battery temperature control accuracy. At the same time, if the current working mode of the thermal management system is the self-circulation mode, when the battery temperature is slightly higher, the self-circulation mode is adjusted to the cooling mode, which will cause Increased energy consumption of the thermal management system.

Contents of the invention

The present application provides a battery temperature control method, device, storage medium and computer equipment, mainly aiming at improving the accuracy of battery temperature control and reducing the energy consumption of a thermal management system for controlling the battery temperature.

According to the first aspect of the present application, a battery temperature control method is provided, including:

Obtain the temperature value corresponding to each battery in the battery pack, and obtain the actual temperature value of the coolant in the thermal management system that controls the temperature of the battery;

judging whether the actual temperature value of the cooling liquid is greater than or equal to a first preset actual temperature value and less than or equal to a second preset actual temperature value;

If the actual temperature value is greater than or equal to the first preset actual temperature value and less than or equal to the second preset actual temperature value, then determine the thermal management system based on the temperature values corresponding to the respective batteries The target temperature value of the coolant in the medium;

determining the next working mode of the thermal management system according to the actual temperature value, the target temperature value and the current working mode of the thermal management system;

Based on the next working mode, the temperature of the battery is controlled.

According to a second aspect of the present application, a battery temperature control device is provided, including:

An acquisition unit, configured to acquire the temperature value corresponding to each battery in the battery pack, and acquire the actual temperature value of the coolant in the thermal management system that controls the temperature of the battery;

A judging unit, configured to judge whether the actual temperature value of the cooling liquid is greater than or equal to a first preset actual temperature value and less than or equal to a second preset actual temperature value;

The first determining unit is configured to: if the actual temperature value is greater than or equal to the first preset actual temperature value and less than or equal to the second preset actual temperature value, based on the temperature values corresponding to the respective batteries , determining the target temperature value of the coolant in the thermal management system;

A second determining unit, configured to determine the next working mode of the thermal management system according to the actual temperature value, the target temperature value and the current working mode of the thermal management system;

A control unit, configured to control the temperature of the battery based on the next working mode.

According to a third aspect of the present application, a computer-readable storage medium is provided, on which a computer program is stored, and when the program is executed by a processor, the following steps are implemented:

Based on the next working mode, the temperature of the battery is controlled.

According to a fourth aspect of the present application, a computer device is provided, including a memory, a processor, and a computer program stored on the memory and operable on the processor, and the processor implements the following steps when executing the program:

Based on the next working mode, the temperature of the battery is controlled.

According to a battery temperature control method, device, storage medium and computer equipment provided by the present application, compared with the current method of adjusting the working mode of the thermal management system according to the temperature of the battery pack to control the battery temperature, the present application adopts Obtain the temperature value corresponding to each battery in the battery pack, and obtain the actual temperature value of the coolant in the thermal management system that controls the temperature of the battery; and determine whether the actual temperature value of the coolant is greater than or equal to the first preset The actual temperature value is less than or equal to the second preset actual temperature value; then if the actual temperature value is greater than or equal to the first preset actual temperature value and less than or equal to the second preset actual temperature value, Then, based on the temperature values corresponding to the respective batteries, determine the target temperature value of the coolant in the thermal management system; at the same time, according to the actual temperature, the target temperature value and the current working mode of the thermal management system , to determine the next step working mode of the thermal management system; finally based on the next step working mode, control the temperature of the battery, thus through the actual temperature of the coolant in the thermal management system, the target temperature and the thermal management The current working mode of the system determines the next working mode of the thermal management system, and finally controls the battery temperature based on the next working mode, which can avoid adjusting the self-circulation mode to cooling when the battery temperature is slightly higher The problem of the mode improves the accuracy of battery temperature control, and at the same time reduces the energy consumption of the thermal management system that controls the battery temperature.

Description of drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The schematic embodiments and descriptions of the application are used to explain the application and do not constitute an improper limitation to the application. In the attached picture:

FIG. 1 shows a flowchart of a battery temperature control method provided by an embodiment of the present application;

Fig. 2 shows a flow chart of another battery temperature control method provided by the embodiment of the present application;

Fig. 3 shows a schematic structural diagram of a battery temperature control device provided by an embodiment of the present application;

Fig. 4 shows a schematic structural diagram of another battery temperature control device provided by an embodiment of the present application;

FIG. 5 shows a schematic diagram of a physical structure of a computer device provided by an embodiment of the present application.

Detailed ways

Hereinafter, the present application will be described in detail with reference to the drawings and embodiments. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

At present, adjusting the working mode of the thermal management system according to the temperature of the battery pack to realize the control of the battery temperature leads to low accuracy of battery temperature control. At the same time, if the current working mode of the thermal management system is the self-circulation mode, when If the battery temperature is slightly higher, the self-circulation mode will be adjusted to the cooling mode, which will increase the energy consumption of the thermal management system.

In order to solve the above problems, an embodiment of the present application provides a battery temperature control method, as shown in FIG. 1 , the method includes the following steps.

Obtain the temperature value corresponding to each battery in the battery pack, and obtain the actual temperature value of the coolant in the thermal management system that controls the temperature of the battery.

Wherein, the heat management system includes a refrigeration system and a circulation system, the refrigeration system includes a compressor, and the compressor is used to heat the cooling liquid in the heat management system, and the function of the circulation system is to promote The cooling liquid circulates around the battery pack, and the battery pack is composed of a plurality of batteries.

For the embodiment of the present application, in order to overcome the problem of low battery temperature control accuracy in the prior art and the large energy consumption of the thermal management system that controls the battery temperature, the embodiment of the present application uses the actual cooling liquid in the thermal management system temperature, target temperature, and the current working mode of the thermal management system, determine the next working mode of the thermal management system, and finally control the battery temperature based on the next working mode, which can avoid when the battery temperature is slightly The problem of adjusting the self-circulation mode to the cooling mode is high, which improves the accuracy of battery temperature control and can also reduce the energy consumption of the thermal management system that controls the battery temperature. The embodiment of the present application is mainly applied to the scene of controlling the battery temperature, and the execution subject of the embodiment of the present application is a device or device capable of controlling the battery temperature, which may be specifically set on the client side or the server side.

Specifically, in order to control the battery temperature, it is first necessary to obtain the temperature values corresponding to each battery in the battery pack. Based on this, the method is to install a temperature sensor on each battery in the battery pack, and the temperature value read by the temperature sensor The values are all displayed on the user terminal. After the electric vehicle with the battery pack installed is started or during the process of charging the battery pack, the temperature corresponding to each battery in the battery pack can be measured by the temperature sensor, and each temperature value obtained by the measurement Feedback to the user terminal can obtain the temperature value corresponding to each battery in the battery pack. Similarly, a temperature sensor will be installed on the inner wall of the circulation pipeline in the circulation system, and the temperature of the coolant in the circulation pipeline measured by the temperature sensor will be Sending the temperature to the user terminal can obtain the actual temperature of the coolant in the thermal management system that controls the temperature of the battery, and judge whether the actual temperature value meets the requirements. If it meets the requirements, then based on each battery determine the target temperature of the coolant in the thermal management system based on the corresponding temperature value and the actual temperature of the coolant, and at the same time, according to the actual temperature, the target temperature value and the current working temperature of the thermal management system mode, determine the next working mode of the thermal management system, and finally control the battery temperature based on the next working mode.

It is judged whether the actual temperature value of the cooling liquid is greater than or equal to a first preset actual temperature value and less than or equal to a second preset actual temperature value.

For the embodiment of the present application, in order to ensure driving safety, it is necessary to detect whether the thermal management system that controls the battery temperature is faulty. Based on this, after obtaining the actual temperature value corresponding to the coolant in the thermal management system, it is necessary to determine whether the Whether the actual temperature value is greater than or equal to the first preset actual temperature value, and at the same time judge whether the actual temperature value is less than or equal to the second preset actual temperature value, if the actual temperature value is greater than or equal to the first preset actual temperature value temperature value, and less than or equal to the second preset actual temperature value, it means that the thermal management system is operating normally, that is, the temperature of the cooling liquid cannot be too high, and at the same time it cannot be too low, and the temperature of the cooling liquid is too high or too low will indicate that the thermal management system is faulty. In the case of normal operation of the thermal management system, the target temperature value of the coolant in the thermal management system is determined based on the temperature values corresponding to the respective batteries. And based on the actual temperature value, the target temperature value and the current working mode of the thermal management system, determine the next working mode of the thermal management system, and based on the next working mode, perform a temperature check on the battery temperature Control can prevent the thermal management system from failing to control the battery temperature, which will cause the battery temperature to be too high and affect driving safety.

If the actual temperature value is greater than or equal to the first preset actual temperature value and less than or equal to the second preset actual temperature value, then determine the thermal management system based on the temperature values corresponding to the respective batteries The target temperature value of the coolant in the middle.

For this embodiment of the application, if the actual temperature value is greater than or equal to the first preset actual temperature value and less than or equal to the second preset actual temperature value, it means that the thermal management system is operating normally. According to the magnitude of the temperature value, a target temperature value is set for the coolant in the thermal management system, and based on the actual temperature of the coolant, the target temperature value and the current working mode of the thermal management system, Determine the next step working mode of the thermal management system, and finally control the battery temperature based on the next step working mode, which can avoid the problem of adjusting the self-circulation mode to the cooling mode when the battery temperature is slightly higher, and improves the The accuracy of battery temperature control can also reduce the energy consumption of the thermal management system that controls the battery temperature.

A next step working mode of the thermal management system is determined according to the actual temperature value, the target temperature value and the current working mode of the thermal management system.

Wherein, the current working mode of the thermal management system is standby mode or cooling mode or self-circulation mode. In the standby mode, the compressor in the thermal management system is turned off, and the circulation pump is also turned off. The cooling mode The compressor in the heat management system is on, but the circulation pump is off. In the self-circulation mode, the circulation pump in the heat management system is on, but the compressor is off.

Specifically, after determining the actual temperature and target temperature corresponding to the cooling liquid, in order to determine the next working mode of the thermal management system, it is also necessary to determine the current working mode of the thermal management system. screen, the current working mode of the thermal management system can be obtained. At this time, compare the actual temperature with the target temperature value, and determine the current working mode of the thermal management system according to the comparison result Describe the working mode of the thermal management system in the next step, and finally control the temperature of the battery based on the working mode in the next step, avoiding adjusting the working mode of the thermal management system only according to the battery temperature, and improving the efficiency of battery temperature control accuracy while reducing energy consumption in the thermal management system that controls the battery temperature.

Based on the next working mode, the temperature of the battery is controlled.

For the embodiment of the present application, after the next-step working mode of the thermal management system is determined, the working mode of the thermal management system is adjusted to the next-step working mode, and finally based on the next-step working mode, the During the driving process or the charging process, the battery is cooled to avoid excessive battery temperature affecting driving safety or affecting the service life of the battery. The current working mode determines the next working mode of the thermal management system, and finally controls the battery temperature based on the next working mode, which can avoid the problem of adjusting the self-circulation mode to the cooling mode when the battery temperature is slightly higher The problem is to improve the accuracy of battery temperature control, and at the same time reduce the energy consumption of the thermal management system that controls the battery temperature.

According to a battery temperature control method provided by this application, compared with the current method of adjusting the working mode of the thermal management system according to the temperature of the battery pack to control the battery temperature, this application obtains the temperature corresponding to each battery in the battery pack. temperature value, and obtain the actual temperature of the coolant in the thermal management system that controls the temperature of the battery; and determine the target temperature value of the coolant in the thermal management system based on the temperature values corresponding to the batteries; At the same time, according to the actual temperature, the target temperature value and the current working mode of the thermal management system, determine the next working mode of the thermal management system; performing control, thereby determining the next-step working mode of the thermal management system based on the actual temperature and target temperature of the cooling liquid in the thermal management system, and the current working mode of the thermal management system, and finally based on the next-step working mode, Controlling the battery temperature can avoid the problem of adjusting the self-circulation mode to the cooling mode when the battery temperature is slightly high, improves the accuracy of battery temperature control, and can also reduce the performance of the thermal management system that controls the battery temperature. consumption.

Further, in order to better illustrate the above-mentioned process of controlling the battery temperature, as a refinement and extension of the above-mentioned embodiment, the embodiment of the present application provides another method for controlling the battery temperature, as shown in FIG. 2 , the The method includes the following steps.

For this embodiment of the application, when the vehicle is started, that is, when the battery pack enters the working state, or when the battery pack is ready to be charged, the BMS communicates with the TMS to wake up the TMS, wherein the BMS represents the battery management system, and TMS represents the thermal management system. system, after the battery pack is powered on at high voltage, the thermal management system that controls the temperature of the battery pack is charged and enters the standby mode. The actual temperature value of the coolant in the battery, and based on the actual temperature value, determine whether the thermal management system is faulty, and if there is no fault, then determine the maximum temperature among the various temperature values based on the temperature values corresponding to the respective batteries value and the minimum temperature value, and based on the maximum temperature value and the minimum temperature value, determine the first temperature value of the coolant, and finally determine based on the actual temperature value, the first temperature value and the current working mode of the thermal management system The next working mode of the thermal management system is finally to control the temperature of the battery based on the next working mode.

For the embodiment of the present application, after obtaining the actual temperature value corresponding to the cooling liquid in the thermal management system, it is necessary to judge whether the thermal management system is operating normally based on the actual temperature value. The specific judgment method is to judge the temperature of the cooling liquid Whether the actual temperature value is greater than or equal to the first preset actual temperature value and less than or equal to the second preset actual temperature value, if the actual temperature value is less than the first preset actual temperature value, or greater than the second preset actual temperature value A preset actual temperature value indicates that the thermal management system is faulty. Based on this, the method includes: if the actual temperature value is less than the first preset actual temperature value, or greater than the second preset actual temperature value , it is determined that there is a fault in the thermal management system, wherein the second preset actual temperature value is greater than the first preset actual temperature value; based on the fault information corresponding to the fault, the working of the thermal management system The mode is adjusted to the standby mode, and the fault information is sent to the user terminal, so that the user can check and repair the thermal management system based on the fault information.

Specifically, based on the actual temperature of the coolant in the thermal management system, if the actual temperature value is less than the first preset actual temperature value, or greater than the second preset actual temperature value, then the thermal management system The temperature of the battery cannot be controlled, that is, the thermal management system fails, and based on the fault information corresponding to the fault, the working mode of the thermal management system is kept in standby mode, and the fault information is fed back to the user terminal, the user terminal overhauls the thermal management system based on the fault information, and then continues to monitor the actual temperature corresponding to the coolant after the overhaul is completed. At the same time, if the actual temperature value is greater than or equal to the first A preset actual temperature value that is less than or equal to the second preset actual temperature value indicates that the thermal management system is operating normally, and at this time, the thermal management system is used to control the temperature of the battery.

If the actual temperature value is greater than or equal to the first preset actual temperature value and less than or equal to the second preset actual temperature value, then based on the temperature values corresponding to each battery, determine the Maximum temperature value and minimum temperature value.

For this embodiment of the application, if the actual temperature value is greater than or equal to the first preset actual temperature value and less than or equal to the second preset actual temperature value, it means that the thermal management system is working normally, and then continue to use the The thermal management system controls the temperature of the battery, because the battery pack contains multiple batteries, and the temperature corresponding to each battery may be different, so it is necessary to determine the maximum temperature value and the minimum temperature value of each temperature value, through the temperature sensor, The temperature values corresponding to each battery can be measured, and the maximum temperature value and the minimum temperature value can be determined in each temperature value. After determining the maximum temperature value and the minimum temperature value, in order to effectively control the battery temperature and reduce the thermal management system energy consumption for work, the method further includes: judging whether the maximum temperature value is less than the second preset temperature value, and whether the minimum temperature value is less than a third preset temperature value, wherein the second preset temperature value The temperature value is greater than the third preset temperature value; if the maximum temperature value is smaller than the second preset temperature value, and the minimum temperature value is smaller than the third preset temperature value, then determine the thermal management The next working mode of the system is standby mode.

Specifically, comparing the maximum temperature value with a second preset temperature value, and comparing the minimum temperature value with a third preset temperature value, if the maximum temperature value is less than the second preset temperature value value, and the minimum temperature value is less than the third preset temperature value, it means that the temperature of the battery pack is within a reasonable range at this time, and there is no need to cool down the battery, so it is determined that the thermal management system The next working mode is the standby mode, that is, the compressor in the thermal management system is turned off, and the circulation pump is also turned off.

If the maximum temperature value is greater than a first preset temperature value, and the minimum temperature value is greater than a second preset temperature value, then determine that the target temperature value of the coolant in the thermal management system is the first temperature value, wherein, The first preset temperature value is greater than the second preset temperature value.

For the embodiment of the present application, after determining the maximum temperature value and the minimum temperature value among the various temperature values, in order to determine the corresponding target temperature value of the coolant in the thermal management system, it is necessary to determine whether the maximum temperature value is greater than the first preset temperature value , while judging whether the minimum temperature value is greater than the second preset temperature value, if the maximum temperature value is greater than the first preset temperature value, and the minimum temperature value is greater than the second preset temperature value, the heat The target temperature value of the coolant in the management system is set as the first temperature value, and according to the actual temperature, the first temperature value and the current working mode of the thermal management system, determine the next step of the work of the thermal management system mode, and finally adjust the battery temperature based on the working mode in the next step.

A next-step working mode of the thermal management system is determined according to the actual temperature, the first temperature value, and the current working mode of the thermal management system.

For this embodiment of the application, after determining the actual temperature and the first temperature value corresponding to the cooling liquid, and the current working mode of the thermal management system, it is necessary to manage the current working mode of the thermal management system, and determine the next working mode of the thermal management system. Based on this, step 205 specifically includes: if the actual temperature is greater than or equal to the first temperature value, then determine the thermal management system The next working mode is cooling mode; if the actual temperature is less than or equal to the fourth preset temperature value, then determine that the next working mode of the thermal management system is self-circulation mode; if the actual temperature is greater than the fourth If the preset temperature value is less than the first temperature value, the next working mode of the thermal management system is determined based on the current working mode.

Specifically, it is judged whether the actual temperature is greater than or equal to the first temperature value, and if the actual temperature is greater than or equal to the first temperature value, then determine the temperature of the cooling and heating fluid flowing out of the battery pack after cooling down the battery pack higher, that is, the temperature of the battery pack is higher, and the battery needs to be cooled quickly. At this time, the coolant needs to be cooled, so it is determined that the next working mode of the thermal management system is the cooling mode, that is, turn on The compressor refrigerates the coolant, and at the same time turns on the circulation pump, and uses the circulation pump to circulate the coolant around the battery pack to achieve the purpose of cooling the battery. During the cooling mode, in order to effectively cool the battery For processing, the rotation speed of the compressor needs to be adjusted. Based on this, the method includes: subtracting the actual temperature from the first temperature value to obtain the temperature difference corresponding to the coolant in the thermal management system; if the If the temperature difference is greater than the preset temperature difference, adjust the rotation speed of the compressor in the refrigeration mode to the first rotation speed; if the temperature difference is less than or equal to the preset temperature difference, then adjust The rotation speed of the middle compressor is adjusted to a second rotation speed, wherein the first rotation speed is greater than the second rotation speed.

Specifically, in cooling mode, the actual temperature is subtracted from the first temperature value to obtain the temperature difference corresponding to the coolant in the thermal management system, if the temperature difference is greater than the preset temperature difference , it means that the temperature of the cooling liquid is high, that is, the temperature of the battery is high. At this time, it is necessary to quickly cool down the battery, so the speed of the compressor needs to be increased, that is, the speed of the compressor is adjusted to the first speed to realize Rapidly cool down the battery. If the temperature difference is less than or equal to the preset temperature difference, the compressor can cool down the battery at a relatively low speed. In order to reduce the energy consumption of the compressor, it is necessary to Adjusting the rotation speed of the compressor in the refrigeration mode to the second rotation speed.

Further, if the actual temperature is less than or equal to the fourth preset temperature value, it is determined that the temperature of the battery pack is good and is in a safe state. In order to save energy consumption of the thermal management system, only the circulation pump is turned on at this time. To achieve the purpose of controlling the battery temperature, it is determined that the next working mode of the thermal management system is the self-circulation mode, that is, the circulation pump is on, but the compressor is off.

Further, if the actual temperature is greater than the fourth preset temperature value and less than the first temperature value, at this time, in order to save energy consumption of the thermal management system, it is necessary to determine The next working mode of the thermal management system. Based on this, the method includes: if the current working mode is standby mode or self-circulation mode, then determining that the next working mode of the thermal management system is self-circulation mode; If the current working mode is the cooling mode, it is determined that the next working mode of the thermal management system is the cooling mode.

Specifically, if the actual temperature is greater than the fourth preset temperature value and less than the first temperature value, then determine the current working mode of the thermal management system, if the current working mode is standby mode or Self-circulation mode, based on the self-circulation mode, it is also possible to cool the battery, and then determine that the next working mode of the thermal management system is the self-circulation mode. If the current working mode is the cooling mode, in order to avoid constant If switching the working mode causes energy consumption, it is determined that the next working mode of the thermal management system is still the cooling mode.

Based on the next working mode, the temperature of the battery is controlled.

For the embodiment of the present application, after determining the next working mode of the thermal management system, if the next working mode is the self-circulation mode, the temperature of the battery is controlled based on the self-circulation mode. If the one-step working mode is a cooling mode, the temperature of the battery is controlled based on the cooling mode.

According to another battery temperature control method provided by this application, compared with the current method of adjusting the working mode of the thermal management system according to the temperature of the battery pack to control the battery temperature, this application obtains the corresponding battery temperature of each battery in the battery pack. temperature value, and obtain the actual temperature of the coolant in the thermal management system that controls the battery temperature; and determine the target temperature value of the coolant in the thermal management system based on the temperature values corresponding to the batteries; and At the same time, according to the actual temperature, the target temperature value and the current working mode of the thermal management system, determine the next working mode of the thermal management system; The temperature is controlled, so the next step working mode of the thermal management system is determined based on the actual temperature of the coolant in the thermal management system, the target temperature and the current working mode of the thermal management system, and finally based on the next step working mode , controlling the battery temperature can avoid the problem of adjusting the self-circulation mode to the cooling mode when the battery temperature is slightly high, improves the accuracy of battery temperature control, and can also reduce the thermal management system that controls the battery temperature. energy consumption.

Further, as a specific implementation of FIG. 1, the embodiment of the present application provides a battery temperature control device. As shown in FIG. A determination unit 34 and a control unit 35 .

The acquiring unit 31 can be used to acquire the temperature value corresponding to each battery in the battery pack, and acquire the actual temperature value of the coolant in the thermal management system that controls the temperature of the battery.

The judging unit 32 may be used to judge whether the actual temperature value of the cooling liquid is greater than or equal to a first preset actual temperature value and less than or equal to a second preset actual temperature value.

The first determining unit 33 may be configured to: if the actual temperature value is greater than or equal to the first preset actual temperature value and less than or equal to the second preset actual temperature value, based on the Corresponding to the temperature value, determine the target temperature value of the coolant in the thermal management system.

The second determining unit 34 can be configured to determine the next working mode of the thermal management system according to the actual temperature value, the target temperature value and the current working mode of the thermal management system.

The control unit 35 can be used to control the temperature of the battery based on the next working mode.

In a specific application scenario, in order to determine the target temperature value of the coolant in the thermal management system, as shown in FIG. The maximum temperature value and the minimum temperature value in the temperature values; if the maximum temperature value is greater than the first preset temperature value, and the minimum temperature value is greater than the second preset temperature value, then it is determined that the coolant in the thermal management system The target temperature value is a first temperature value, wherein the first preset temperature value is greater than the second preset temperature value.

In a specific application scenario, in order to determine the working mode of the thermal management system, the first determination unit 33 can also be used to determine whether the maximum temperature value is less than the second preset temperature value, and the minimum Whether the temperature value is less than a third preset temperature value, wherein the second preset temperature value is greater than the third preset temperature value; if the maximum temperature value is less than the second preset temperature value, and the minimum If the temperature value is less than the third preset temperature value, it is determined that the next working mode of the thermal management system is the standby mode.

In a specific application scenario, in order to determine the next working mode of the thermal management system, the second determination unit 34 may be specifically configured to determine the thermal The next working mode of the management system is cooling mode; if the actual temperature is less than or equal to the fourth preset temperature value, then determine that the next working mode of the thermal management system is self-circulation mode; if the actual temperature is greater than the set If the fourth preset temperature value is lower than the first temperature value, the next working mode of the thermal management system is determined based on the current working mode.

In a specific application scenario, in order to determine the next working mode of the thermal management system based on the current working mode, the second determining unit 34 can also be used to determine if the current working mode is standby mode or self-circulation mode, it is determined that the next working mode of the thermal management system is the self-circulation mode; if the current working mode is the cooling mode, it is determined that the next working mode of the thermal management system is the cooling mode.

In a specific application scenario, in order to adjust the rotation speed of the compressor in the refrigeration mode, the second determination unit 34 includes a subtraction module 341 and an adjustment module 342 .

The subtraction module 341 may be configured to subtract the actual temperature from the first temperature value to obtain a temperature difference corresponding to the coolant in the thermal management system.

The adjustment module 342 may be configured to adjust the rotation speed of the compressor in the cooling mode to a first rotation speed if the temperature difference is greater than a preset temperature difference.

The adjustment module 342 may also be configured to adjust the rotation speed of the compressor in the cooling mode to a second rotation speed if the temperature difference is less than or equal to the preset temperature difference, wherein the first The rotation speed is greater than the second rotation speed.

In a specific application scenario, in order to detect whether the thermal management system fails, the device further includes: an adjustment unit 36 .

The second determination unit 34 may also be configured to determine that the thermal management system is faulty if it is greater than the fifth preset temperature value or less than the sixth preset temperature value, wherein the fifth preset temperature value is Set the temperature value to be greater than the sixth preset temperature value.

The adjusting unit 36 can be configured to adjust the working mode of the thermal management system to the standby mode based on the fault information corresponding to the fault, and send the fault information to the user terminal, so that the user can The thermal management system is serviced.

It should be noted that, for other corresponding descriptions of the functional modules involved in the battery temperature control device provided in the embodiment of the present application, reference may be made to the corresponding description of the method shown in FIG. 1 , which will not be repeated here.

Based on the method shown in Figure 1 above, correspondingly, the embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the following steps are implemented: obtaining each A temperature value corresponding to the battery, and obtaining an actual temperature of the coolant in the thermal management system controlling the temperature of the battery; based on the temperature values corresponding to each battery, determining a target temperature value of the coolant in the thermal management system; According to the actual temperature, the target temperature value and the current working mode of the thermal management system, determine the next working mode of the thermal management system; based on the next working mode, control the temperature of the battery.

Based on the above-mentioned embodiment of the method shown in FIG. 1 and the device shown in FIG. 3 , the embodiment of the present application also provides a physical structure diagram of a computer device, as shown in FIG. 5 , the computer device includes: a processor 41, Memory 42, and a computer program stored on the memory 42 and operable on the processor, wherein the memory 42 and the processor 41 are all set on the bus 43 and the processor 41 implements the following steps when executing the program: obtain the battery pack The temperature value corresponding to each battery in the battery, and obtain the actual temperature of the coolant in the thermal management system that controls the temperature of the battery; based on the temperature value corresponding to each battery, determine the target temperature of the coolant in the thermal management system value; according to the actual temperature, the target temperature value and the current working mode of the thermal management system, determine the next working mode of the thermal management system; control.

Through the technical solution of the application, the application obtains the temperature value corresponding to each battery in the battery pack, and obtains the actual temperature of the coolant in the thermal management system that controls the temperature of the battery; and based on the temperature corresponding to each battery value, determine the target temperature value of the coolant in the thermal management system; at the same time, determine the lower temperature of the thermal management system according to the actual temperature, the target temperature value and the current working mode of the thermal management system One-step working mode; finally, based on the next-step working mode, the temperature of the battery is controlled, thereby determining the The next-step working mode of the thermal management system is finally based on the next-step working mode to control the battery temperature, which can avoid the problem of adjusting the self-circulation mode to the cooling mode when the battery temperature is slightly high, and improves the battery temperature control. It also reduces the energy consumption of the thermal management system that controls the battery temperature.

Obviously, those skilled in the art should understand that each module or each step of the above-mentioned application can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed in a network composed of multiple computing devices Alternatively, they may be implemented in program code executable by a computing device so that they may be stored in a storage device to be executed by a computing device, and in some cases in an order different from that shown here The steps shown or described are carried out, or they are separately fabricated into individual integrated circuit modules, or multiple modules or steps among them are fabricated into a single integrated circuit module for implementation. As such, the present application is not limited to any specific combination of hardware and software.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims

A battery temperature control method, comprising:

Obtain the temperature value corresponding to each battery in the battery pack, and obtain the actual temperature value of the coolant in the thermal management system that controls the temperature of the battery;

judging whether the actual temperature value of the cooling liquid is greater than or equal to a first preset actual temperature value and less than or equal to a second preset actual temperature value;

If the actual temperature value is greater than or equal to the first preset actual temperature value and less than or equal to the second preset actual temperature value, then determine the thermal management system based on the temperature values corresponding to the respective batteries The target temperature value of the coolant in the medium;

determining the next working mode of the thermal management system according to the actual temperature value, the target temperature value and the current working mode of the thermal management system;

Based on the next working mode, the temperature of the battery is controlled.
The method according to claim 1, wherein said determining the target temperature value of the coolant in the thermal management system based on the temperature values corresponding to the respective batteries comprises:

determining a maximum temperature value and a minimum temperature value among the various temperature values based on the temperature values corresponding to the respective batteries;

If the maximum temperature value is greater than a first preset temperature value, and the minimum temperature value is greater than a second preset temperature value, then determine that the target temperature value of the coolant in the thermal management system is the first temperature value, wherein, The first preset temperature value is greater than the second preset temperature value.
The method according to claim 2, wherein, after determining the maximum temperature value and the minimum temperature value among the various temperature values based on the temperature values corresponding to the respective batteries, the method further comprises:

judging whether the maximum temperature value is less than the second preset temperature value, and whether the minimum temperature value is less than a third preset temperature value, wherein the second preset temperature value is greater than the third preset temperature value ;

If the maximum temperature value is less than the second preset temperature value and the minimum temperature value is less than the third preset temperature value, it is determined that the next working mode of the thermal management system is the standby mode.
The method according to claim 2, wherein the working modes of the thermal management system include refrigeration mode and self-circulation mode, and the mode, to determine the next working mode of the thermal management system, including:

If the actual temperature value is greater than or equal to the first temperature value, then determine that the next working mode of the thermal management system is cooling mode;

If the actual temperature value is less than or equal to the fourth preset temperature value, it is determined that the next working mode of the thermal management system is the self-circulation mode;

If the actual temperature value is greater than the fourth preset temperature value and less than the first temperature value, then based on the current working mode, determine the next working mode of the thermal management system.
The method according to claim 4, wherein said determining a next-step working mode of the thermal management system based on the current working mode comprises:

If the current working mode is standby mode or self-circulation mode, then determine that the next working mode of the thermal management system is self-circulation mode;

If the current working mode is the cooling mode, it is determined that the next working mode of the thermal management system is the cooling mode.
The method according to claim 4, wherein after said if the actual temperature value is greater than or equal to the first temperature value, determining that the next working mode of the thermal management system is cooling mode, the method Also includes:

Subtracting the actual temperature value from the first temperature value to obtain a temperature difference corresponding to the coolant in the thermal management system;

If the temperature difference is greater than a preset temperature difference, adjusting the rotation speed of the compressor in the refrigeration mode to a first rotation speed;

If the temperature difference is less than or equal to the preset temperature difference, adjusting the rotation speed of the compressor in the refrigeration mode to a second rotation speed, wherein the first rotation speed is greater than the second rotation speed.
The method according to claim 1, wherein after said judging whether the actual temperature value of the cooling liquid is greater than or equal to a first preset actual temperature value and less than or equal to a second preset actual temperature value, said Methods also include:

If the actual temperature value is less than the first preset actual temperature value, or greater than the second preset actual temperature value, it is determined that the thermal management system is faulty, wherein the second preset actual temperature value greater than the first preset actual temperature value;

Based on the fault information corresponding to the fault, the working mode of the thermal management system is adjusted to a standby mode, and the fault information is sent to a user terminal, so that the user can overhaul the thermal management system based on the fault information.
A battery temperature control device, comprising:

An acquisition unit, configured to acquire the temperature value corresponding to each battery in the battery pack, and acquire the actual temperature value of the coolant in the thermal management system that controls the temperature of the battery;

A judging unit, configured to judge whether the actual temperature value of the cooling liquid is greater than or equal to a first preset actual temperature value and less than or equal to a second preset actual temperature value;

The first determining unit is configured to: if the actual temperature value is greater than or equal to the first preset actual temperature value and less than or equal to the second preset actual temperature value, based on the temperature values corresponding to the respective batteries , determining the target temperature value of the coolant in the thermal management system;

A second determining unit, configured to determine the next working mode of the thermal management system according to the actual temperature value, the target temperature value and the current working mode of the thermal management system;

A control unit, configured to control the temperature of the battery based on the next working mode.
A pure electric wide-body vehicle, comprising: the battery temperature control device according to claim 8.
A computer-readable storage medium on which a computer program is stored, wherein the computer program implements the steps of the method according to any one of claims 1 to 7 when executed by a processor.
A computer device, comprising a memory, a processor, and a computer program stored on the memory and operable on the processor, characterized in that, when the computer program is executed by the processor, it implements any one of claims 1 to 7. steps of the method described above.