Thermal management method and device of power battery, storage medium, system and vehicle

Abstract

The invention discloses a thermal management method and device of a power battery, a storage medium, a system and a vehicle, and the thermal management method of the power battery comprises the steps: obtaining a current temperature, a target temperature and a temperature change rate of the power battery; determining the working condition of the power battery according to the current temperature and the temperature change rate; determining control parameters of a temperature control system of the power battery according to the working condition of the power battery; and the temperature control system is controlled according to the control parameters, so that the temperature of the power battery reaches the target temperature. Therefore, more accurate cooling control can be realized, so that the cooling energy consumption is effectively reduced while the safety of the battery is guaranteed, and the cruising ability of the electric vehicle is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and in particular to a thermal management method for a power battery, a computer-readable storage medium, a thermal management device for a power battery, a thermal management system and a vehicle. Background Art

[0002] With the rapid development of new energy vehicle technology, pure electric commercial vehicles, as an important part of green transportation, have gradually expanded their operating scope from traditional urban logistics distribution to suburban and longer-distance transportation scenarios. This transformation has put forward higher requirements on the performance of commercial vehicles, especially the power output of the whole vehicle and the endurance of the power battery. In order to meet the requirements of longer driving mileage and more complex working conditions, the power battery system of commercial vehicles has gradually developed in the direction of large capacity and high energy density, which also brings higher heat generation and heat dissipation requirements.

[0003] The power battery cooling technology for commercial vehicles is transitioning from traditional air cooling to more efficient liquid cooling technology. Liquid cooling technology directly removes the heat generated by the battery pack through a liquid medium, effectively improving the heat dissipation efficiency and ensuring the safety and stability of the battery. However, the operation of the liquid cooling system also consumes electrical energy, and its cooling energy consumption is directly related to the overall endurance performance of the electric vehicle. In the related technology, the cooling control of liquid-cooled power batteries mainly relies on the temperature threshold of the battery cell as a single judgment condition for starting and shutting down the cooling. That is, when the cell temperature exceeds the preset high temperature threshold, the system automatically starts cooling. Conversely, when the temperature drops below the low temperature threshold, the cooling system is shut down. However, the dynamic characteristics of the cell temperature changes under different operating conditions of the vehicle are ignored, including the temperature rise rate and the temperature drop rate.

[0004] Specifically, the heat generated by the battery and the heat dissipation conditions under different working conditions vary significantly. If the control is based only on the absolute value of the temperature, the cooling system may start too early or shut down late under certain working conditions, resulting in unnecessary energy waste and affecting the vehicle's range. In addition, frequent temperature fluctuations may also have an adverse effect on battery performance and life. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the first purpose of the present invention is to propose a thermal management method for a power battery, which can achieve more accurate cooling control, thereby effectively reducing cooling energy consumption while ensuring battery safety, and improving the endurance of electric vehicles.

[0006] A second object of the present invention is to provide a computer-readable storage medium.

[0007] The third objective of the present invention is to provide a thermal management device for a power battery.

[0008] A fourth objective of the present invention is to provide a thermal management system.

[0009] A fifth object of the present invention is to provide a vehicle.

[0010] In order to achieve the above-mentioned objectives, an embodiment of the first aspect of the present invention proposes a thermal management method for a power battery, wherein the method includes: obtaining a current temperature, a target temperature and a temperature change rate of the power battery; determining an operating condition of the power battery according to the current temperature and the temperature change rate; determining control parameters of a temperature control system of the power battery according to the operating condition of the power battery; and controlling the temperature control system according to the control parameters so that the temperature of the power battery reaches the target temperature.

[0011] According to the thermal management method of the power battery of the embodiment of the present invention, the current temperature, target temperature and temperature change rate of the power battery are obtained, and then the working condition of the power battery is determined according to the current temperature and temperature change rate, and the control parameters of the temperature control system of the power battery are determined according to the working condition of the power battery, and the temperature control system is controlled according to the control parameters so that the temperature of the power battery reaches the target temperature. In this way, more accurate cooling control can be achieved, thereby effectively reducing cooling energy consumption while ensuring battery safety, and improving the endurance of electric vehicles.

[0012] In addition, the thermal management method of the power battery according to the above embodiment of the present invention may also include the following additional technical features:

[0013] According to an embodiment of the present invention, before controlling the temperature control system according to the control parameter, the method further includes: modifying the control parameter according to the current temperature and the target temperature.

[0014] According to one embodiment of the present invention, determining the control parameters of the temperature control system of the power battery according to the operating condition of the power battery further includes: determining the control parameters of the temperature control system according to a query table of the operating condition of the power battery, wherein the table is determined by simulation based on experimental operating conditions of the power battery and control parameters corresponding to the experimental operating conditions.

[0015] According to an embodiment of the present invention, the power battery is applied to a vehicle, and the method further includes: acquiring road condition information of the vehicle; and determining the operating condition of the power battery according to the road condition information, the current temperature and the temperature change rate.

[0016] According to one embodiment of the present invention, the temperature control system includes a water pump, a compressor, a heat exchanger and / or a radiator.

[0017] According to an embodiment of the present invention, the control parameters include the rotation speed of the water pump, the rotation speed of the compressor, the heat exchange efficiency of the heat exchanger and / or the heat dissipation efficiency of the radiator.

[0018] In order to achieve the above-mentioned objectives, a second aspect of the present invention proposes a computer-readable storage medium on which a thermal management program for a power battery is stored. When the thermal management program for the power battery is executed by a processor, the thermal management method for the power battery of the aforementioned embodiment of the present invention is implemented.

[0019] According to the computer-readable storage medium of the embodiment of the present invention, more precise cooling control can be achieved by executing the thermal management program of the power battery through the processor, thereby effectively reducing cooling energy consumption and improving the endurance of the electric vehicle while ensuring battery safety.

[0020] In order to achieve the above-mentioned purpose, an embodiment of the third aspect of the present invention proposes a thermal management device for a power battery, wherein the device includes: an acquisition module, used to acquire the current temperature, target temperature and temperature change rate of the power battery; a determination module, used to determine the operating condition of the power battery according to the current temperature and the temperature change rate; determine the control parameters of the temperature control system of the power battery according to the operating condition of the power battery; and a control module, used to control the temperature control system according to the control parameters so that the temperature of the power battery reaches the target temperature.

[0021] According to the thermal management device of the power battery of the embodiment of the present invention, the current temperature, target temperature and temperature change rate of the power battery are obtained through the acquisition module, and then the working condition of the power battery is determined according to the current temperature and temperature change rate through the determination module, and the control parameters of the temperature control system of the power battery are determined according to the working condition of the power battery, and the temperature control system is controlled according to the control parameters through the control module so that the temperature of the power battery reaches the target temperature. In this way, more accurate cooling control can be achieved, thereby effectively reducing cooling energy consumption while ensuring battery safety and improving the endurance of electric vehicles.

[0022] In order to achieve the above-mentioned purpose, a fourth aspect of the present invention proposes a thermal management system, including the thermal management device of the power battery of the aforementioned embodiment of the present invention.

[0023] According to the thermal management system of the embodiment of the present invention, by adopting the thermal management device of the power battery of the above embodiment of the present invention, more precise cooling control can be achieved, thereby effectively reducing cooling energy consumption while ensuring battery safety and improving the endurance of the electric vehicle.

[0024] In order to achieve the above-mentioned objectives, a fourth aspect of the present invention provides a vehicle, comprising the thermal management system of the aforementioned embodiment of the present invention.

[0025] The vehicle according to the embodiment of the present invention can achieve more precise cooling control by adopting the thermal management system of the above embodiment of the present invention, thereby effectively reducing cooling energy consumption and improving the endurance of the electric vehicle while ensuring battery safety.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic flow chart of a thermal management method for a power battery according to an embodiment of the present invention;

[0028] Figure 2 is a schematic flow chart of a thermal management method for a power battery according to another embodiment of the present invention;

[0029] Figure 3 is a control logic diagram of a thermal management method for a power battery according to an embodiment of the present invention;

[0030] Figure 4 is a block diagram of a thermal management device for a power battery according to an embodiment of the present invention;

[0031] Figure 5 is a block diagram of a thermal management system according to an embodiment of the present invention;

[0032] Figure 6 is a block diagram of a vehicle according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0034] The following describes a thermal management method for a power battery, a computer-readable storage medium, a thermal management device for a power battery, a thermal management system, and a vehicle according to embodiments of the present invention with reference to the accompanying drawings.

[0035] Figure 1 1 is a flow chart of a thermal management method for a power battery according to an embodiment of the present invention.

[0036] Specifically, in some embodiments of the present invention, Figure 1As shown, the thermal management method of the power battery includes:

[0037] S101, obtaining the current temperature, target temperature and temperature change rate of the power battery.

[0038] Specifically, in this embodiment, a temperature sensor can be installed on the power battery to obtain the current temperature of the power battery through the temperature sensor. The target temperature is an optimal operating temperature range that the power battery is expected to reach and maintain during operation. The range is determined comprehensively based on the specific type of battery, the required performance, and the actual working environment conditions. The target temperature is usually embedded in the battery management system and set by the battery manufacturer or system engineer to ensure that the power battery can operate under optimal temperature conditions to ensure its performance, efficiency and safety. The temperature change rate is a key indicator to measure how fast the power battery temperature changes over time. The temperature change rate can be obtained by performing time differentiation processing on the continuously collected temperature data, that is, calculating the ratio of the difference in temperature changes at adjacent time points to the corresponding time interval.

[0039] S102, determining the operating condition of the power battery according to the current temperature and the temperature change rate.

[0040] Specifically, in this embodiment, after obtaining the current temperature and temperature change rate of the power battery, the operating condition of the power battery can be determined according to the current temperature and temperature change rate. For example, under climbing conditions, in spring and autumn, when the ambient temperature is moderate, a 6-ton truck is traveling under continuous climbing conditions. Since the vehicle requires greater power output when climbing, the power battery will experience a higher discharge power, resulting in a large amount of heat being generated internally. According to the current temperature and the rapidly increasing temperature change rate, it can be determined that the power battery is currently in a climbing condition.

[0041] Under starting, stopping and low-speed driving conditions, the vehicle is driving on a flat road, including frequent starting, stopping and low-speed driving. At this time, the discharge power of the power battery is relatively low and the heat generated is also less. According to the current temperature and the almost unchanged temperature change rate, it can be judged that the power battery is currently in the starting, stopping and low-speed driving conditions.

[0042] S103, determining control parameters of a temperature control system of the power battery according to the operating condition of the power battery.

[0043] Specifically, in this embodiment, after determining the working condition of the power battery according to the current temperature and the temperature change rate, the system can determine the control parameters of the temperature control system of the power battery by querying a preset map table according to the determined working condition information. The preset map table is based on the performance of the power battery under different experimental working conditions, obtained through simulation analysis, and the preset map table directly associates the relationship between the working condition of the power battery and the control parameters.

[0044] It should be noted that the control parameters of the temperature control system of the power battery may include the speed of the water pump, the speed of the compressor, the heat exchange efficiency of the heat exchanger and / or the heat dissipation efficiency of the radiator. In a specific embodiment, when the working condition of the power battery is determined to be a climbing condition, the speed of the compressor in the control parameters of the temperature control system of the power battery can be determined to be 5000rpm according to the working condition of the power battery, and when the working condition of the power battery is determined to be a low-speed driving flat slope condition, the speed of the compressor in the control parameters of the temperature control system of the power battery can be determined to be 1500rpm according to the working condition of the power battery.

[0045] S104: Control the temperature control system according to the control parameters so that the temperature of the power battery reaches the target temperature.

[0046] Specifically, in this embodiment, after determining the control parameters of the temperature control system of the power battery according to the working condition of the power battery, the temperature control system can be controlled according to the control parameters so that the temperature of the power battery reaches the target temperature. Wherein, the temperature control system includes a water pump, a compressor, a heat exchanger and / or a radiator, and the working state of the water pump, the compressor, the heat exchanger and / or the radiator (such as the speed of the water pump and the compressor, and the efficiency of the heat exchanger and the radiator) is controlled by a PI (proportional integral) controller, so that the temperature of the power battery can be effectively adjusted so that it gradually approaches and stabilizes within the target temperature range.

[0047] Furthermore, in some embodiments of the present invention, before controlling the temperature control system according to the control parameters, the method further includes: modifying the control parameters according to the current temperature and the target temperature.

[0048] Specifically, in this embodiment, the temperature control system includes a water pump, a compressor, a heat exchanger and / or a radiator, and the control parameters include the speed of the water pump, the speed of the compressor, the heat exchange efficiency of the heat exchanger and / or the heat dissipation efficiency of the radiator. Before controlling the temperature control system according to the control parameters, the system needs to obtain the current temperature of the power battery in real time and compare the current temperature with the target temperature. This comparison process will reveal the size and direction of the temperature difference (i.e., whether the current temperature is higher or lower than the target temperature). According to the size of the temperature difference, the system can formulate different control parameter adjustment strategies. For example, when the temperature is much higher than the target temperature, it may be necessary to significantly increase the speed of the water pump and compressor to speed up the heat dissipation, and when the temperature is close to the target temperature, these speeds should be gradually reduced to avoid overcooling, thereby completing the correction of the control parameters. In addition, the correction process should be dynamic, that is, as the battery temperature changes, the control parameters should also be continuously adjusted to ensure the accuracy of the control parameters.

[0049] Furthermore, in some embodiments of the present invention, determining the control parameters of the temperature control system of the power battery according to the operating conditions of the power battery also includes: determining the control parameters of the temperature control system according to a query table of the operating conditions of the power battery, wherein the table is determined by simulation based on the experimental operating conditions of the power battery and the control parameters corresponding to the experimental operating conditions.

[0050] Specifically, in this embodiment, by obtaining the current temperature and temperature change rate of the power battery, and determining the operating condition of the power battery according to the current temperature and temperature change rate, the control parameters of the temperature control system can be determined according to a power battery operating condition query table, wherein the table is determined by simulation based on the experimental operating condition of the power battery and the control parameters corresponding to the experimental operating condition.

[0051] When the working condition of the power battery changes, the system can quickly locate the corresponding entry in the table and directly obtain the control parameters suitable for the current working condition without complicated calculations or reasoning. This greatly improves the response speed of the temperature control system and effectively reduces the risk of misjudgment or delayed adjustment.

[0052] Further, in some embodiments of the present invention, Figure 2 As shown, the power battery is applied to a vehicle, and the thermal management method of the power battery also includes:

[0053] S201, obtaining road condition information of the vehicle.

[0054] Specifically, in this embodiment, a camera may be installed on the vehicle to obtain the road condition information of the vehicle through the camera, and the road condition information may include but is not limited to the road type (such as expressways, city streets, mountain roads, etc.), traffic congestion, road slope, speed limit, and expected driving distance, etc. In addition, the present invention may not specifically limit the method of obtaining the road condition information of the vehicle, for example, the road condition information of the vehicle may also be obtained through vehicle-mounted sensors, GPS systems, navigation systems, or communication between the vehicle and infrastructure.

[0055] S202, determining the operating condition of the power battery according to the road condition information, the current temperature and the temperature change rate.

[0056] Specifically, in this embodiment, after obtaining the road condition information, the current temperature and the temperature change rate, the working condition of the power battery can be determined according to the road condition information, the current temperature and the temperature change rate, wherein the impact of the road condition information on the working condition of the power battery is mainly reflected in the change in the battery energy demand. For example, when driving at high speed or uphill, the battery needs to provide more energy to the drive motor, which may cause the battery temperature to rise, and in congested urban traffic, the vehicle starts and stops frequently, and the battery's energy output fluctuates greatly, which may also affect the temperature. Then, by comprehensively considering the road condition information, the current temperature and the temperature change rate, the system can more accurately determine the working condition of the power battery to ensure battery performance optimization and safe operation.

[0057] Furthermore, in some embodiments of the present invention, the temperature control system includes a water pump, a compressor, a heat exchanger and / or a radiator. In addition, the present invention may not specifically limit the type of equipment included in the temperature control system.

[0058] Further, in some embodiments of the present invention, the control parameters include the rotation speed of the water pump, the rotation speed of the compressor, the heat exchange efficiency of the heat exchanger and / or the heat dissipation efficiency of the radiator. In addition, the present invention may not specifically limit the types of control parameters.

[0059] In summary, in a specific embodiment of the present invention, Figure 3 As shown, after the battery management system BMS obtains the current temperature and target temperature of the power battery, it sends the current temperature and target temperature of the power battery to the thermal management system. The thermal management system can obtain the temperature change rate by performing time differential processing on the continuously collected temperature data, that is, calculating the ratio of the difference in temperature changes at adjacent time points to the corresponding time interval. The thermal management system determines the working condition of the power battery according to the current temperature and the temperature change rate, and then queries the map table according to the working condition of the power battery to determine the control parameters of the temperature control system, wherein the control parameters include the speed of the water pump, the speed of the compressor, the heat exchange efficiency of the heat exchanger and / or the heat dissipation efficiency of the radiator, that is, the map table can be queried according to the working condition of the power battery to determine the speed of the water pump and the speed of the compressor, etc. After obtaining the temperature control parameters, the control parameters can be corrected according to the current temperature and the target temperature, so that the temperature control system is controlled according to the corrected control parameters so that the temperature of the power battery reaches the target temperature.

[0060] In summary, according to the thermal management method of the power battery of the embodiment of the present invention, the current temperature, target temperature and temperature change rate of the power battery are obtained, and then the working condition of the power battery is determined according to the current temperature and temperature change rate, and the control parameters of the temperature control system of the power battery are determined according to the working condition of the power battery, and the temperature control system is controlled according to the control parameters so that the temperature of the power battery reaches the target temperature. In this way, more accurate cooling control can be achieved, thereby effectively reducing cooling energy consumption while ensuring battery safety, and improving the endurance of electric vehicles.

[0061] Based on the vehicle control method proposed in the aforementioned embodiment of the present invention, the embodiment of the present invention further proposes a computer-readable storage medium, on which a thermal management program for a power battery is stored. When the thermal management program for the power battery is executed by a processor, the thermal management method for the power battery in the aforementioned embodiment of the present invention is implemented.

[0062] According to the computer-readable storage medium of the embodiment of the present invention, more precise cooling control can be achieved by executing the thermal management program of the power battery through the processor, thereby effectively reducing cooling energy consumption and improving the endurance of the electric vehicle while ensuring battery safety.

[0063] Figure 4 is a block diagram of a thermal management device for a power battery according to an embodiment of the present invention.

[0064] Specifically, Figure 4 As shown, the thermal management device 100 of a power battery includes an acquisition module 10 , a determination module 20 and a control module 30 .

[0065] Among them, the acquisition module 10 is used to obtain the current temperature, target temperature and temperature change rate of the power battery; the determination module 20 is used to determine the operating condition of the power battery according to the current temperature and the temperature change rate; determine the control parameters of the temperature control system of the power battery according to the operating condition of the power battery; the control module 30 is used to control the temperature control system according to the control parameters so that the temperature of the power battery reaches the target temperature.

[0066] In some embodiments of the present invention, before controlling the temperature control system according to the control parameters, the control module 30 is further configured to modify the control parameters according to the current temperature and the target temperature.

[0067] In some embodiments of the present invention, the determination module 20 is specifically used to determine the control parameters of the temperature control system according to the operating condition query table of the power battery, wherein the table is simulated and determined according to the experimental operating conditions of the power battery and the control parameters corresponding to the experimental operating conditions.

[0068] In some embodiments of the present invention, the power battery is applied to a vehicle, and the acquisition module 10 is further used to acquire the road condition information of the vehicle; the determination module 20 is further used to determine the working condition of the power battery according to the road condition information, the current temperature and the temperature change rate.

[0069] In some embodiments of the present invention, the temperature control system includes a water pump, a compressor, a heat exchanger and / or a radiator.

[0070] In some embodiments of the present invention, the control parameters include the rotation speed of the water pump, the rotation speed of the compressor, the heat exchange efficiency of the heat exchanger and / or the heat dissipation efficiency of the radiator.

[0071] It should be noted that for other specific implementations of the thermal management device for a power battery provided in an embodiment of the present invention, reference may be made to the specific implementations of the thermal management method for a power battery provided in the aforementioned embodiment of the present invention, and will not be described in detail herein to reduce redundancy.

[0072] In summary, according to the thermal management device of the power battery of the embodiment of the present invention, the current temperature, target temperature and temperature change rate of the power battery are obtained through the acquisition module, and then the working condition of the power battery is determined according to the current temperature and temperature change rate through the determination module, and the control parameters of the temperature control system of the power battery are determined according to the working condition of the power battery, and the temperature control system is controlled according to the control parameters through the control module so that the temperature of the power battery reaches the target temperature. In this way, more accurate cooling control can be achieved, thereby effectively reducing cooling energy consumption while ensuring battery safety and improving the endurance of electric vehicles.

[0073] Figure 5 is a block diagram of a thermal management system according to an embodiment of the present invention.

[0074] Specifically, Figure 5 As shown, the thermal management system 1000 includes the thermal management device 100 of the power battery according to the above-mentioned embodiment of the present invention.

[0075] According to the thermal management system of the embodiment of the present invention, by adopting the thermal management device of the power battery of the above embodiment of the present invention, more precise cooling control can be achieved, thereby effectively reducing cooling energy consumption while ensuring battery safety and improving the endurance of the electric vehicle.

[0076] Figure 6 is a block diagram of a vehicle according to an embodiment of the present invention.

[0077] Specifically, Figure 6 As shown, vehicle 2000 includes the thermal management system 1000 according to the above-mentioned embodiment of the present invention.

[0078] The vehicle according to the embodiment of the present invention can achieve more precise cooling control by adopting the thermal management system of the above embodiment of the present invention, thereby effectively reducing cooling energy consumption and improving the endurance of the electric vehicle while ensuring battery safety.

[0079] In addition, other structures and functions of the vehicle of the embodiment of the present invention are known to those skilled in the art and will not be described in detail here to reduce redundancy.

[0080] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0081] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0082] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0083] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0084] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0085] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0086] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0087] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A thermal management method for a power battery, characterized in that: The method comprises: Obtaining the current temperature, target temperature and temperature change rate of the power battery; determining an operating condition of the power battery according to the current temperature and the temperature change rate; Determining control parameters of a temperature control system of the power battery according to an operating condition of the power battery; The temperature control system is controlled according to the control parameter so that the temperature of the power battery reaches the target temperature.

2. The thermal management method of a power battery according to claim 1, characterized in that: Before controlling the temperature control system according to the control parameter, the method further includes: The control parameter is modified according to the current temperature and the target temperature.

3. The thermal management method of a power battery according to claim 1, characterized in that: The determining the control parameters of the temperature control system of the power battery according to the operating condition of the power battery further includes: The control parameters of the temperature control system are determined according to a table query based on the working condition of the power battery, wherein the table is determined by simulation based on the experimental working condition of the power battery and the control parameters corresponding to the experimental working condition.

4. The thermal management method of a power battery according to claim 1 or 3, characterized in that: The power battery is applied to a vehicle, and the method further comprises: Obtaining road condition information of the vehicle; The operating condition of the power battery is determined according to the road condition information, the current temperature and the temperature change rate.

5. The thermal management method of a power battery according to claim 1, characterized in that: The temperature control system includes a water pump, a compressor, a heat exchanger and / or a radiator.

6. The thermal management method of a power battery according to claim 5, characterized in that: The control parameters include the rotation speed of the water pump, the rotation speed of the compressor, the heat exchange efficiency of the heat exchanger and / or the heat dissipation efficiency of the radiator.

7. A computer-readable storage medium, characterized in that: A thermal management program of a power battery is stored thereon, and when the thermal management program of the power battery is executed by a processor, a thermal management method of a power battery according to any one of claims 1 to 6 is implemented.

8. A thermal management device for a power battery, characterized in that: The device comprises: An acquisition module, used to acquire the current temperature, target temperature and temperature change rate of the power battery; a determination module, configured to determine the operating condition of the power battery according to the current temperature and the temperature change rate; and determine control parameters of a temperature control system of the power battery according to the operating condition of the power battery; A control module is used to control the temperature control system according to the control parameters so that the temperature of the power battery reaches the target temperature.

9. A thermal management system, characterized in that: A thermal management device for a power battery comprising the thermal management device of claim 8.

10. A vehicle, characterized in that: Includes the thermal management system as claimed in claim 9.

Images