Battery temperature control method and device, medium, equipment and vehicle
By adjusting the temperature according to the SOC state of the battery during charging, ensuring that the battery can be charged with the maximum charging current under different SOC states, the problem of low charging rate in the prior art is solved and the charging efficiency of the battery is improved.
Patent Information
- Application Number
- CN202311436229.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-31
- Publication Date
- 2025-05-02
AI Technical Summary
The prior art ignores the difference in the maximum charging current of the battery under different SOC states during the charging process, resulting in the inability to always keep the battery charged at the maximum charging current, affecting the charging rate.
By obtaining the remaining power of the battery and the detection temperature, the target temperature range corresponding to the remaining power is determined based on the preset mapping relationship, and the battery is heated or cooled according to the comparison results, so that its temperature is maintained within the target temperature range.
It realizes that the battery can be charged with the maximum charging current in different SOC states, and improves the charging efficiency of the battery.
Smart Images
Figure CN119911168A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of vehicle technology, and in particular to a battery temperature control method, device, medium, equipment and vehicle. Background Art
[0002] Based on the electrochemical characteristics of lithium-ion batteries, the maximum charging current that a battery can withstand in a charging state increases with the increase in battery temperature, and decreases with the increase in the internal charge (State of Charge, SOC) of the battery, that is, the maximum allowable charging current is different for batteries in different temperature states and SOC states. In order to maximize the charging capacity of the battery, it is necessary to combine the battery thermal management strategy to control the battery at an appropriate temperature during the charging process.
[0003] Existing technical solutions often only control the battery temperature, and the temperature control strategies under different SOC states are the same, ignoring the fact that the maximum charging current that the battery can withstand under different SOC states will also be different, and thus it is impossible to always keep the battery able to charge with the maximum charging current under different SOC states, affecting the battery charging rate. Summary of the invention
[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a battery temperature control method, device, medium, equipment and vehicle.
[0005] In a first aspect, the present disclosure provides a battery temperature control method, the method comprising:
[0006] Get the remaining battery power and detect the temperature;
[0007] Determine the target temperature range corresponding to the remaining power based on a preset mapping relationship;
[0008] The detected temperature is compared with the target temperature range, and the battery is heated or cooled based on the comparison result so that the temperature of the battery is maintained within the target temperature range.
[0009] Optionally, the mapping relationship is a correspondence between a remaining power interval and a target temperature interval; wherein the battery power is divided into at least two remaining power intervals, each remaining power interval corresponds to a target temperature interval, and the remaining power corresponds to a target temperature interval when it is within any remaining power interval.
[0010] Optionally, the maximum temperature value corresponding to the target temperature interval is the cooling turn-on threshold, the minimum temperature value corresponding to the target temperature interval is the heating turn-on threshold, the heating turn-off threshold is less than the cooling turn-off threshold, the cooling turn-off threshold is less than the cooling turn-on threshold, and the heating turn-off threshold is greater than the heating turn-on threshold.
[0011] Optionally, the first difference, the second difference and the third difference are all greater than the difference threshold;
[0012] Among them, the first difference is the difference between the heating on threshold and the heating off threshold, the second difference is the difference between the heating off threshold and the cooling off threshold, and the third difference is the difference between the cooling off threshold and the cooling on threshold; the difference threshold is greater than or equal to the maximum temperature difference inside the battery.
[0013] Optionally, comparing the detected temperature with the target temperature range, and heating or cooling the battery based on the comparison result, includes:
[0014] Determining that the detected temperature reaches the cooling start threshold, cooling the battery;
[0015] or,
[0016] Determining that the detected temperature reaches the heating start threshold, heating the battery;
[0017] or,
[0018] Determining that the detected temperature reaches the cooling shutdown threshold, and stopping cooling the battery;
[0019] or,
[0020] It is determined that the detected temperature reaches the heating shutdown threshold, and heating of the battery is stopped.
[0021] Optionally, it also includes:
[0022] Determine that the detected temperature exceeds the over-temperature value under the target working condition, and reduce the cooling on threshold, the heating on threshold, the cooling off threshold, and the heating off threshold by a temperature adjustment value;
[0023] Wherein, the over-temperature value is greater than or equal to the cooling start threshold.
[0024] In a second aspect, the present disclosure further provides a battery temperature control device, the device comprising:
[0025] An acquisition module is used to obtain the remaining power of the battery and detect the temperature;
[0026] A determination module, configured to determine a target temperature range corresponding to the remaining power based on a preset mapping relationship;
[0027] The maintaining module is used to compare the detected temperature with the target temperature range, and heat or cool the battery based on the comparison result to keep the temperature of the battery within the target temperature range.
[0028] In a third aspect, the present disclosure further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a program or instruction, wherein the program or instruction enables a computer to execute the steps of the method as described in any one of the first aspects.
[0029] In a fourth aspect, the present disclosure further provides an electronic device, including: a processor and a memory;
[0030] The processor is used to execute the steps of any method described in the first aspect by calling the program or instructions stored in the memory.
[0031] In a fifth aspect, the present disclosure further provides a vehicle, comprising the device as described in the second aspect or the electronic device as described in the fourth aspect.
[0032] The present disclosure provides a battery temperature control method, device, medium, equipment and vehicle. The method includes: obtaining the remaining power and detection temperature of the battery; determining the target temperature range corresponding to the remaining power based on a preset mapping relationship; comparing the detection temperature with the target temperature range, heating or cooling the battery based on the comparison result, so that the temperature of the battery remains within the target temperature range. In this way, the embodiment of the present disclosure can realize the control of the target temperature range of the battery based on the remaining power of the battery, that is, it can realize the control of the battery temperature within different target temperature ranges based on different battery remaining powers. The target temperature range can be the temperature range that can achieve the maximum charging current of the battery under the current remaining power. Therefore, the battery temperature control method provided by the present disclosure is conducive to always keeping the battery within the temperature range that can be charged with the maximum charging current under different remaining powers, which is conducive to improving the charging efficiency of the battery. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] Figure 1 A schematic flow chart of a battery temperature control method provided in an embodiment of the present disclosure;
[0034] Figure 2 A schematic diagram of a battery temperature versus SOC curve provided in an embodiment of the present disclosure;
[0035] Figure 3 A schematic diagram of the structure of a battery temperature control device provided in an embodiment of the present disclosure;
[0036] Figure 4A schematic diagram of the structure of an electronic device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION
[0037] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.
[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.
[0039] A battery temperature control method, device, medium, equipment and vehicle provided by an embodiment of the present disclosure are exemplarily described below with reference to the accompanying drawings.
[0040] Figure 1 A flow chart of a battery temperature control method provided in an embodiment of the present disclosure, the method comprising:
[0041] S101, obtaining the remaining battery power and detection temperature of the battery;
[0042] S102, determining a target temperature range corresponding to the remaining power based on a preset mapping relationship;
[0043] S103 : Compare the detected temperature with the target temperature range, and heat or cool the battery based on the comparison result to keep the battery temperature within the target temperature range.
[0044] Exemplarily, the remaining power of the battery can be represented by a percentage value, for example, when there is no power stored in the battery, the remaining power can be 0, when the battery stores full power, the remaining power can be 100%, and when the battery stores half power, the remaining power can be 50%; in some scenarios, the remaining power of the battery can also be represented by SOC. The detection temperature represents the temperature of the battery detected by a preset temperature detection device, which can be the temperature of the battery surface or the temperature inside the battery. Different remaining powers can correspond to different target temperature ranges, for example, when the remaining power of the battery is 50%, the target temperature range can be 40℃-45℃, and when the remaining power of the battery is 45%, the target temperature range can be 35℃-40℃; that is, different remaining powers can correspond to different target temperature ranges; the setting criterion of the target temperature range can be that when the temperature of the battery is in the target temperature range, the maximum charging current that the battery can allow is the maximum; it should be noted that the maximum charging current described in the embodiment of the present disclosure refers to the maximum value of the comparison values of the corresponding allowable charging currents at different temperatures based on the current remaining power as a fixed reference.
[0045] After obtaining the remaining power and the detected temperature of the battery, the corresponding target temperature interval can be first determined based on the remaining power, and whether the detected temperature is within the target temperature interval can be determined based on the target temperature interval corresponding to the current remaining power. If it is not within the target temperature interval, the temperature of the battery can be controlled to adjust the temperature of the battery to within the target temperature interval. After the temperature of the battery is adjusted to within the target temperature interval, the battery can be allowed to be charged with a larger charging current, and thus the charging efficiency can be higher. In summary, the embodiments of the present disclosure can realize the control of the target temperature interval of the battery based on the remaining power of the battery, that is, the temperature of the battery can be controlled within different target temperature intervals based on different remaining powers of the battery. The target temperature interval can be the temperature interval in which the battery can achieve the maximum charging current at the current remaining power, and thus the battery temperature control method provided by the present disclosure is conducive to the battery always being kept within the temperature interval in which it can be charged with the maximum charging current when the remaining power is different, which is conducive to improving the charging efficiency of the battery.
[0046] In some embodiments, the mapping relationship is a correspondence between a remaining power interval and a target temperature interval; wherein the battery power is divided into at least two remaining power intervals, each remaining power interval corresponds to a target temperature interval, and the remaining power corresponds to a target temperature interval when it is within any remaining power interval.
[0047] Exemplarily, the mapping relationship can be a correspondence between the remaining power interval and the target temperature interval. For example, the remaining power interval of the battery can be divided into three intervals: 0-35%, 35%-70% and 70%-100%, and each remaining power interval can correspond to a different target temperature interval; it should be noted that the target temperature interval is actually a numerical interval, so the different target temperature intervals in the above description may be overlapping intervals; assuming that the target temperature interval corresponding to 0-35% may be 35℃-40℃, and the target temperature interval corresponding to 35-70% may be 38℃-43℃, that is, there is an overlap with the target temperature interval corresponding to 0-35%, and the target temperature interval corresponding to 35-70% may also be 40.01℃-45℃, that is, there is no overlap with the target temperature interval corresponding to 0-35%, and in either case, different remaining power intervals can be called corresponding to different target temperature intervals.
[0048] After associating the remaining power with the remaining power interval and determining the mapping relationship between the remaining power interval and the target temperature, the temperature interval corresponding to the maximum charging current of the current battery, i.e., the target temperature interval, can be determined based on the remaining power. After the battery temperature is controlled within the target temperature interval, the battery can be charged at the maximum charging current, which is conducive to improving the charging rate of the battery. In addition, by determining the mapping relationship as the remaining power interval and the target temperature interval, and determining the target temperature interval based on the remaining power interval in which the remaining power is located, it is possible to avoid frequent adjustments to the target temperature interval, thereby reducing the difficulty of temperature control.
[0049] In some embodiments, the maximum temperature value corresponding to the target temperature interval is the cooling turn-on threshold, the minimum temperature value corresponding to the target temperature interval is the heating turn-on threshold, the heating turn-off threshold is less than the cooling turn-off threshold, the cooling turn-off threshold is less than the cooling turn-on threshold, and the heating turn-off threshold is greater than the heating turn-on threshold.
[0050] Exemplarily, in order to control the temperature of the battery within the target temperature range, the heating on threshold, heating off threshold, cooling off threshold and cooling on threshold can be set respectively. It is not difficult to understand that in order to control the temperature of the battery within the target temperature range, the heating on threshold, heating off threshold, cooling off threshold and cooling on threshold are increased in turn. Assuming that the corresponding target temperature range is 40℃-50℃ under a certain remaining power, the heating on threshold can be 40℃, the heating off threshold can be 43℃, the cooling off threshold can be 46℃, and the cooling on threshold can be 50℃.
[0051] As a possible implementation, the heating on threshold, the heating off threshold, the cooling off threshold, and the cooling on threshold may be determined in the following manner:
[0052] Typical low-temperature charging initial temperatures, such as -10°C, 0°C, and 10°C, can be used to start charging from 0% SOC and heat the battery throughout the entire process to obtain the variation curves of Tmax and Tmin inside the battery with the battery SOC during the charging process, such as Figure 2 A schematic diagram of a battery temperature versus SOC curve provided in an embodiment of the present disclosure; wherein Tmax represents the maximum temperature inside the battery, and Tmin represents the minimum temperature inside the battery. Based on the Tmax and Tmin change curves during the charging process, the heating on threshold and heating off threshold are set for different SOC intervals to ensure that the heating off temperature threshold is always greater than Tmax, and the heating on threshold is as high as possible, and the temperature difference between the two can be 3°C. Figure 2For example, in the 0%-35% SOC range, the heating off threshold can be set at 25℃-30℃, and in the 70%-100% SOC range, the heating off threshold can be set at 35℃-40℃. After determining the heating on threshold and the heating off threshold, add an interval of 3-5℃ on the basis of the heating exit threshold as the cooling on threshold; the cooling off threshold can be consistent with the heating off threshold, or there can be a certain difference.
[0053] By setting the above threshold, the temperature of the battery can be maintained within the target temperature range based on the above threshold, so that the battery can be charged with the maximum charging current, which is beneficial to improving the charging rate of the battery.
[0054] In some embodiments, the first difference, the second difference, and the third difference are all greater than a difference threshold;
[0055] Among them, the first difference is the difference between the heating on threshold and the heating off threshold, the second difference is the difference between the heating off threshold and the cooling off threshold, and the third difference is the difference between the cooling off threshold and the cooling on threshold; the difference threshold is greater than or equal to the maximum temperature difference inside the battery.
[0056] For example, the vehicle battery is generally composed of multiple cells connected. Whether in the process of charging or discharging the battery, the temperature at different positions of the battery is different. For the same vehicle battery, the temperature of point A may be 40°C, and the temperature of point B may be 43°C. Therefore, if the heating on threshold, heating off threshold, cooling off threshold and cooling on threshold are set relatively close, it may cause confusion in the temperature control logic; for example, if the heating on threshold is 40°C, the heating off threshold is 41°C, the cooling off threshold is 42°C, and the cooling on threshold is 43°C, it may cause heating and cooling to be carried out at the same time, that is, when it is detected that the temperature of point A reaches the heating on threshold and heating is required, the temperature of point B also reaches the cooling on threshold and cooling is required; or when it is detected that the temperature of point A reaches the heating on threshold and heating is required, the temperature of point B also reaches the heating off threshold and heating needs to be stopped. In view of the above situation, if the heating on threshold, heating off threshold, cooling off threshold and cooling on threshold are set relatively close, it is easy to cause the inability to determine how to control the temperature of the battery. Therefore, the first difference, the second difference and the third difference can be set larger, that is, they are all greater than the maximum temperature difference inside the battery; the maximum temperature difference inside the battery represents the maximum value of the temperature difference between different positions inside the battery. After determining that the first difference, the second difference and the third difference are greater than the maximum temperature difference, it can be ensured that heating and cooling will not be triggered at the same time, or heating needs to be turned on and off at the same time, or cooling needs to be turned on and off at the same time, or frequent switching during heating and cooling can be performed, thereby improving the reliability and stability of the control method. For the above embodiment, when the temperatures of different battery positions are collected, it is preferred to meet the conditions, that is, for example, if the temperature of battery point A reaches the cooling on threshold and the temperature of point B does not reach the cooling on threshold, cooling needs to be turned on; if the temperature of battery point A reaches the cooling off threshold and the temperature of point B does not reach the cooling off threshold, cooling needs to be turned off; if the temperature of battery point A reaches the heating on threshold and the temperature of point B does not reach the heating off threshold, heating needs to be turned on; if the temperature of battery point A reaches the heating off threshold and the temperature of point B does not reach the heating off threshold, heating needs to be turned off.
[0057] In some embodiments, comparing the detected temperature with a target temperature range, and heating or cooling the battery based on the comparison result, includes:
[0058] Determine that the detected temperature reaches the cooling start threshold, and cool the battery;
[0059] or,
[0060] Determine that the detected temperature reaches the heating start threshold, and heat the battery;
[0061] or,
[0062] Determine that the detected temperature reaches the cooling shutdown threshold, and stop cooling the battery;
[0063] or,
[0064] It is determined that the detected temperature reaches the heating shutdown threshold and the battery heating is stopped.
[0065] For example, the following Table 1 is a temperature control logic table provided in an embodiment of the present disclosure:
[0066] Table 1 - Temperature control logic table
[0067]
[0068] Among them, SOC represents the remaining power of the battery, expressed in percentage; On represents the activation of temperature control action. Taking the cooling column as an example, On means turning on cooling, and similarly, Off means turning off cooling; T represents the detection temperature, and Tm-n represents the threshold value. For example, T1-1 represents the heating activation threshold corresponding to the remaining power interval of 0-35% of the remaining power.
[0069] Table 1 is used as a reference for an exemplary explanation. Assuming that the battery starts charging from zero power, and the initial temperature of the battery (i.e., the detection temperature) is less than T1-1, the remaining power interval corresponding to the remaining power of the battery is 0-35% when charging starts, and the detection temperature is less than T1-1, then heating is required. When the detection temperature is greater than T>T2-1, heating is stopped; when the battery is in this remaining power interval and the temperature is maintained in the range of T<T1-1 to T>T4-1, the battery allows the maximum charging current to be charged, and the charging rate is faster. During the battery charging process, the battery will continue to generate heat, so even if the battery is no longer heated, the battery temperature may continue to rise; assuming that the remaining power of the battery is still in the remaining power interval corresponding to 0-35%, and the battery temperature rises to T4-1 after the heating is stopped, the battery can be cooled at this time until the detection temperature of the battery is less than T<T3-1.
[0070] Assume that at a certain moment, the remaining power of the battery reaches 36%, and the remaining power range at this time is 35%-70%. Then the above-mentioned keeping the battery temperature in the range of T<T1-1 to T>T4-1 is no longer applicable, but the battery temperature is kept in the range of T<T1-2 to T>T4-2. If the detected temperature of the battery is less than T<T1-2 at this time, the battery needs to be heated. Similarly, if the detected temperature of the battery is greater than T4-2, the battery needs to be cooled. For the sake of simplicity, the process of turning off cooling and turning off heating will not be repeated.
[0071] Through the above method, the battery temperature can be accurately maintained within different target temperature ranges based on different battery remaining capacities, so that the battery always maintains an optimal temperature environment under different remaining capacities, that is, it can always allow maximum charging current for charging, thereby improving the battery charging rate.
[0072] In some embodiments, it also includes:
[0073] Determine that the detected temperature under the target working condition exceeds the over-temperature value, and reduce the cooling on threshold, the heating on threshold, the cooling off threshold, and the heating off threshold by the temperature adjustment value;
[0074] The over-temperature value is greater than or equal to the cooling start threshold.
[0075] Exemplarily, the target operating condition may be an operating condition under a certain specific environment, such as a fast charging condition under an ambient temperature of 35°C, or a fast charging condition under an ambient temperature of 25°C. Taking the fast charging condition under an ambient temperature of 35°C as an example, the ambient temperature of this condition is relatively high, which may easily lead to battery overheating, that is, the detected temperature of the battery exceeds the over-temperature value; the over-temperature value may be greater than or equal to the cooling start threshold, assuming that the cooling start threshold is 45°C, and the over-temperature value may be 50°C. When the battery temperature exceeds the over-temperature value under the target operating conditions, it means that the current target temperature range is unreasonable, that is, the cooling on threshold and the cooling off threshold are actually set too high, which easily leads to battery overheating. At this time, the cooling on threshold, the heating on threshold, the cooling off threshold and the heating off threshold can be reduced by the temperature adjustment value. Assuming that the heating on threshold, the heating off threshold, the cooling off threshold and the cooling on threshold are 35°C, 38°C, 41°C and 44°C respectively, the heating on threshold, the heating off threshold, the cooling off threshold and the cooling on threshold can be reduced by 2°C respectively, that is, after the reduction, the heating on threshold, the heating off threshold, the cooling off threshold and the cooling on threshold are 33°C, 36°C, 39°C and 42°C respectively. When the battery temperature reaches a lower temperature, the battery is cooled to prevent the battery from overheating.
[0076] Through the above method, the heating on threshold, heating off threshold, cooling off threshold and cooling on threshold of the battery can be adjusted based on special scenarios to ensure that the battery does not overheat during the charging process.
[0077] In some embodiments, the method further comprises:
[0078] A preset charging device is controlled to charge the battery with a preset charging current.
[0079] Illustratively, the higher the charging current, the faster the battery charges. Therefore, after adopting the above-mentioned battery temperature control method, the charging device can be controlled to charge the battery with a preset charging current. When the battery has different remaining powers, the battery can be charged with different charging currents so that the battery is always charged with the maximum allowable charging current, that is, the maximum charging rate is always maintained.
[0080] Figure 3 A schematic diagram of a battery temperature control device provided in an embodiment of the present disclosure, the device comprising:
[0081] The acquisition module 301 is used to obtain the remaining power of the battery and the detection temperature;
[0082] A determination module 302 is used to determine a target temperature range corresponding to the remaining power based on a preset mapping relationship;
[0083] The maintaining module 303 is used to compare the detected temperature with the target temperature range, and heat or cool the battery based on the comparison result to keep the temperature of the battery within the target temperature range.
[0084] The battery temperature control device provided in the embodiment of the present disclosure corresponds to the battery temperature control method in the above embodiment, includes the same technical features, and can therefore also achieve the same technical effects as the above battery temperature control method, which will not be repeated here.
[0085] The embodiments of the present disclosure also provide a computer-readable storage medium, which stores a program or instruction, and the program or instruction enables a computer to execute the steps of any method provided in the above embodiments.
[0086] In some embodiments, the computer executable instructions, when executed by a computer processor, can also be used to execute the technical solution of the battery temperature control method provided in the embodiments of the present disclosure to achieve corresponding beneficial effects.
[0087] The embodiment of the present disclosure also provides an electronic device, including: a processor and a memory; the processor calls the program or instruction stored in the memory to execute the steps of any method provided in the above implementation mode to achieve corresponding beneficial effects.
[0088] Figure 4 This is a schematic diagram of the structure of an electronic device provided by an embodiment of the present disclosure. Figure 4 As shown, the electronic device includes one or more processors 401 and a memory 402 .
[0089] The processor 401 may be a central processing unit (CPU) or other forms of processing units having data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device to perform desired functions.
[0090] The memory 402 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, a random access memory (RAM) and / or a cache memory (cache), etc. The non-volatile memory may include, for example, a read-only memory (ROM), a hard disk, a flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 401 may run the program instructions to implement the method of the embodiment of the present disclosure described above, and / or other desired functions. Various contents such as input signals, signal components, noise components, etc. may also be stored in the computer-readable storage medium.
[0091] In one example, the electronic device may further include: an input device 403 and an output device 404, and these components are interconnected via a bus system and / or other forms of connection mechanisms (not shown).
[0092] In addition, the input device 403 may also include, for example, a keyboard, a mouse, and the like.
[0093] The output device 404 can output various information to the outside, including the determined distance information, direction information, etc. The output device 404 can include, for example, a display, a speaker, a printer, a communication network and a remote output device connected thereto, and the like.
[0094] Of course, to simplify, Figure 4 Only some of the components related to the present disclosure in the electronic device are shown, and components such as a bus, an input / output interface, etc. are omitted. In addition, according to specific application situations, the electronic device may further include any other appropriate components.
[0095] It should be noted that the above-mentioned electronic equipment can be set in the vehicle, specifically in the vehicle-mounted system, such as the battery management system; it can also be other terminal devices outside the vehicle, such as mobile phones, computers, smart wearable devices and other electronic devices, which are not limited here.
[0096] The embodiments of the present disclosure also provide a vehicle, which includes the battery temperature control device in the above embodiments or the electronic device in the above embodiments, and achieves the same technical effect as the above battery temperature control device or electronic device.
[0097] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0098] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.
Claims
1. A battery temperature control method, characterized in that: The method comprises: Get the remaining battery power and detect the temperature; Determine the target temperature range corresponding to the remaining power based on a preset mapping relationship; The detected temperature is compared with the target temperature range, and the battery is heated or cooled based on the comparison result so that the temperature of the battery is maintained within the target temperature range.
2. The method according to claim 1, characterized in that The mapping relationship is a correspondence between the remaining power interval and the target temperature interval; wherein the battery power is divided into at least two remaining power intervals, each remaining power interval corresponds to a target temperature interval, and the remaining power corresponds to a target temperature interval when it is within any remaining power interval.
3. The method according to claim 1 or 2, characterized in that: The maximum temperature value corresponding to the target temperature interval is the cooling turn-on threshold, the minimum temperature value corresponding to the target temperature interval is the heating turn-on threshold, the heating turn-off threshold is less than the cooling turn-off threshold, the cooling turn-off threshold is less than the cooling turn-on threshold, and the heating turn-off threshold is greater than the heating turn-on threshold.
4. The method according to claim 3, characterized in that The first difference, the second difference, and the third difference are all greater than the difference threshold; Among them, the first difference is the difference between the heating on threshold and the heating off threshold, the second difference is the difference between the heating off threshold and the cooling off threshold, and the third difference is the difference between the cooling off threshold and the cooling on threshold; the difference threshold is greater than or equal to the maximum temperature difference inside the battery.
5. The method according to claim 3, characterized in that: The comparing the detected temperature with the target temperature range and heating or cooling the battery based on the comparison result includes: Determining that the detected temperature reaches the cooling start threshold, cooling the battery; or, Determining that the detected temperature reaches the heating start threshold, heating the battery; or, Determining that the detected temperature reaches the cooling shutdown threshold, and stopping cooling the battery; or, It is determined that the detected temperature reaches the heating shutdown threshold, and heating of the battery is stopped.
6. The method according to claim 3, characterized in that Also includes: Determine that the detected temperature exceeds the over-temperature value under the target working condition, and reduce the cooling on threshold, the heating on threshold, the cooling off threshold, and the heating off threshold by a temperature adjustment value; Wherein, the over-temperature value is greater than or equal to the cooling start threshold.
7. A battery temperature control device, characterized in that: The device comprises: An acquisition module is used to obtain the remaining power of the battery and detect the temperature; A determination module, configured to determine a target temperature range corresponding to the remaining power based on a preset mapping relationship; The maintaining module is used to compare the detected temperature with the target temperature range, and heat or cool the battery based on the comparison result to keep the temperature of the battery within the target temperature range.
8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a program or instruction, and the program or instruction enables a computer to execute the steps of the method according to any one of claims 1 to 6.
9. An electronic device, characterized in that: include: Processor and memory; The processor is used to execute the steps of the method according to any one of claims 1 to 6 by calling the program or instruction stored in the memory.
10. A vehicle, characterized in that: The vehicle comprises the apparatus according to claim 7 or the electronic device according to claim 9.