Thermal management method, device and equipment of power battery and storage medium

Abstract

The invention discloses a thermal management method, device and equipment of a power battery and a storage medium. The method comprises the following steps: acquiring an internal actual temperature and an external actual temperature of the power battery in real time, and calculating a temperature actual difference value between the internal actual temperature and the external actual temperature; analyzing a numerical relationship between the internal actual temperature of the power battery and a preset internal expected temperature and a numerical relationship between the temperature actual difference value and a preset temperature expected difference value in real time; and a cold / heat exchange system of the power battery is adjusted through a dynamic temperature PID algorithm. According to the technical scheme, accurate adjustment of the thermal management system of the power battery is realized according to the dynamic temperature PID algorithm control method, and the cold / heat exchange system of the power battery is automatically adjusted by continuously feeding back the difference value between the current internal actual temperature of the power battery and the preset internal expected temperature, so that the thermal management efficiency of the power battery is improved. Therefore, the internal actual temperature and the external actual temperature of the power battery are maintained within the appropriate temperature range of the power battery.

Description

Technical Field

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

[0002] As the temperature of power batteries used in hybrid vehicles and electric vehicles gradually decreases, the internal resistance of the power batteries gradually increases. This in turn causes the capacity of a large number of batteries to decrease, thereby reducing the output power of the power batteries. Especially at low temperatures below 0°C, the capacity of the power battery can even drop to half of the rated capacity.

[0003] In the prior art, the power of the power battery itself is usually used to increase the temperature of the power battery. However, this consumes the energy of the power battery, resulting in a decrease in the effective output power of the power battery. That is, the energy required to increase the temperature of the power battery is supplied by the power battery itself, which consumes the energy of the power battery additionally. How to properly solve the above problem has become an urgent issue to be solved in the industry. Summary of the invention

[0004] The present invention provides a thermal management method, device, equipment and storage medium for a power battery, which are used to achieve precise adjustment of the thermal management system of the power battery according to a dynamic temperature PID algorithm control method, so as to maintain the actual internal temperature and the actual external temperature of the power battery within an appropriate temperature range of the power battery.

[0005] According to a first aspect of the present invention, a thermal management method for a power battery is provided, the thermal management method for a power battery comprising:

[0006] Acquire the actual internal temperature and the actual external temperature of the power battery in real time, and calculate the actual temperature difference between the actual internal temperature and the actual external temperature;

[0007] Real-time analysis of the numerical relationship between the actual internal temperature of the power battery and the preset expected internal temperature, and the numerical relationship between the actual temperature difference and the preset expected temperature difference;

[0008] Through the dynamic temperature PID algorithm, the cold / heat exchange system of the power battery is adjusted to control the actual internal temperature to be lower than the preset internal expected temperature and the actual temperature difference to be smaller than the preset temperature expected difference.

[0009] In one embodiment, the method of adjusting the cold / heat exchange system of the power battery by a dynamic temperature PID algorithm includes:

[0010] When the actual internal temperature of the battery is lower than the preset expected internal temperature or the actual temperature difference is greater than or equal to the preset expected temperature difference, the heat exchange system is controlled to be turned on and the cold exchange system is turned off;

[0011] Increasing the value of the preset expected internal temperature and decreasing the value of the preset expected temperature difference;

[0012] Adjust until the actual internal temperature of the battery is greater than or equal to the preset internal expected temperature and the actual temperature difference is less than the preset temperature expected difference, control to turn on the cold exchange system, and turn off the heat exchange system.

[0013] In one embodiment, the method of adjusting the cold / heat exchange system of the power battery by the dynamic temperature PID algorithm further includes:

[0014] When the actual internal temperature of the battery is greater than or equal to the preset expected internal temperature and the actual temperature difference is less than the preset expected temperature difference, controlling to turn on the cold exchange system and turn off the heat exchange system;

[0015] The adjustment is performed until the actual internal temperature is lower than the preset expected internal temperature and the actual temperature difference is smaller than the preset expected temperature difference.

[0016] In one embodiment, it further includes:

[0017] Determining in real time whether the actual internal temperature is lower than a suitable temperature threshold of the power battery;

[0018] When the actual internal temperature is lower than the appropriate temperature threshold of the power battery, and the actual internal temperature is lower than the preset expected internal temperature and the actual temperature difference is less than the preset expected temperature difference, the operation of the cold / heat exchange system is temporarily stopped.

[0019] According to a second aspect of the present invention, there is provided a thermal management device for a power battery, comprising:

[0020] An acquisition module, used to acquire the actual internal temperature and the actual external temperature of the power battery in real time, and calculate the actual temperature difference between the actual internal temperature and the actual external temperature;

[0021] An analysis module, used for analyzing in real time the numerical relationship between the actual internal temperature of the power battery and the preset expected internal temperature, and the numerical relationship between the actual temperature difference and the preset expected temperature difference;

[0022] The regulating module is used to regulate the cold / heat exchange system of the power battery through a dynamic temperature PID algorithm to control the actual internal temperature to be lower than a preset internal expected temperature and the actual temperature difference to be smaller than a preset temperature expected difference.

[0023] In one embodiment, the acquisition module, the analysis module and the adjustment module are controlled to execute any one of the above-mentioned thermal management methods for the power battery.

[0024] According to a third aspect of the present invention, there is provided an electronic device, the electronic device comprising: a communication interface, a processor, and a memory;

[0025] The memory is used to store program instructions, and when the program instructions are executed by the processor that is communicatively connected to the memory through the communication interface, any of the above-mentioned thermal management methods for the power battery is implemented.

[0026] According to a fourth aspect of the present invention, a computer-readable storage medium is provided, on which computer program instructions are stored. When the computer program instructions are executed by a computer (e.g., a processor in the computer), any of the above-mentioned thermal management methods for power batteries is implemented.

[0027] In summary, the present invention provides a thermal management method and device for a power battery, the method comprising: obtaining the actual internal temperature and the actual external temperature of the power battery in real time, and calculating the actual temperature difference between the actual internal temperature and the actual external temperature; analyzing the numerical relationship between the actual internal temperature and the preset internal expected temperature of the power battery, and the numerical relationship between the actual temperature difference and the preset temperature expected difference in real time; adjusting the cold / heat exchange system of the power battery through a dynamic temperature PID algorithm to control the actual internal temperature to be lower than the preset internal expected temperature and the actual temperature difference to be less than the preset temperature expected difference. The technical solution of the present application realizes precise adjustment of the thermal management system of the power battery according to the dynamic temperature PID algorithm control method, and automatically adjusts the cold / heat exchange system of the power battery by continuously feeding back the difference between the current actual internal temperature of the power battery and the preset internal expected temperature, so as to maintain the actual internal temperature and the actual external temperature of the power battery within the appropriate temperature range of the power battery.

[0028] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0029] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A flow chart of a thermal management method for a power battery provided by an embodiment of the present invention;

[0032] Figure 2 Flow chart of step S13 of a thermal management method for a power battery provided by an embodiment of the present invention

[0033] Figure 3 A flowchart of step S13 of another thermal management method for a power battery provided by an embodiment of the present invention;

[0034] Figure 4 A flow chart of another thermal management method for a power battery provided by an embodiment of the present invention;

[0035] Figure 5 A structural diagram of a thermal management device for a power battery provided by an embodiment of the present invention;

[0036] Figure 6 A structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0037] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. 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 terms "include", "comprise" or any other variants thereof are 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 statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0039] like Figure 1 As shown, the present invention provides a thermal management method for a power battery, the thermal management method for a power battery comprising:

[0040] In step S11, the actual internal temperature and the actual external temperature of the power battery are acquired in real time, and the actual temperature difference between the actual internal temperature and the actual external temperature is calculated;

[0041] In step S12, the numerical relationship between the actual internal temperature of the power battery and the preset expected internal temperature, and the numerical relationship between the actual temperature difference and the preset expected temperature difference are analyzed in real time;

[0042] In step S13, the cooling / heat exchange system of the power battery is adjusted through the dynamic temperature PID algorithm to control the actual internal temperature to be lower than the preset internal expected temperature and the actual temperature difference to be smaller than the preset temperature expected difference.

[0043] In one embodiment, the actual internal temperature and the actual external temperature of the power battery are obtained in real time, and the temperature difference between the actual internal temperature and the actual external temperature is calculated. The relationship between the actual internal temperature and the preset internal expected temperature is analyzed, and the relationship between the calculated actual temperature difference and the preset temperature expected difference is analyzed. The dynamic temperature PID algorithm is used to adjust the cold / heat exchange system of the power battery, with the goal of controlling the actual internal temperature to be lower than the preset internal expected temperature, and ensuring that the actual temperature difference is less than the preset temperature expected difference. The temperature control of the power battery is achieved through the heat exchanger and condenser in the cold / heat exchange system. The air inlet is set at the lower end of the power battery, and the air outlet is set at the upper end of the power battery. The air entering the air inlet first passes through the temperature control zone, and then passes through the convection heat exchange zone to achieve air heat exchange.

[0044] Real-time temperature monitoring and difference calculation are the basis of temperature control. The temperature sensor is used to monitor the internal and external temperatures of the power battery in real time, and the difference between the two is calculated to provide data support for subsequent analysis and control. By judging whether the temperature state of the battery meets expectations, the current thermal management strategy is analyzed to see whether it is effective. By comparing the actual temperature with the expected temperature, and the actual temperature difference with the expected temperature difference, the thermal state of the battery can be evaluated and a basis for adjustment can be provided. The PID algorithm is a feedback control algorithm that calculates the control quantity through three links: proportional, integral, and differential to reduce the deviation between the actual temperature inside the battery and the preset internal expected temperature, thereby dynamically adjusting the operation of the cold / heat exchange system to maintain the power battery within the optimal operating temperature range. The precise control of the battery temperature is achieved through devices such as heat exchangers and condensers, and the battery temperature is adjusted through physical processes (such as heat conduction, convection, etc.). Heat exchange can be effectively achieved through a carefully designed air flow path. The location of the air inlet and outlet, as well as the path of the air flow (first through the temperature control area, then through the convection heat exchange area), are all to maximize the heat exchange efficiency and ensure the stability of the battery temperature. Through real-time monitoring, analysis, regulation and physical heat exchange, the temperature of the power battery is ensured to be controlled within an ideal range to improve the performance and safety of the battery.

[0045] In addition, the heat storage characteristics of buildings can play a huge role in promoting the consumption of renewable energy in the electric-thermal coupling system and improving the flexibility and economy of the system operation. By establishing a building heat storage characteristic model that determines the room temperature in real time by the water supply temperature and the outdoor ambient temperature, and combining it with the distributed combined cooling, heating and power system operation optimization model, it is possible to store heat at low electricity prices and release heat at high electricity prices, effectively improving the economy and flexibility of the system operation. The traditional PID algorithm has many limitations when controlling temperature objects with complex dynamic characteristics. The PID temperature control algorithm based on multiple fuzzy neural networks can utilize the nonlinear mapping characteristics of neural networks and combine the adaptive ability of fuzzy logic to improve the accuracy and response speed of temperature control. By establishing a multiple network model that can output the three parameters of PID separately, it can better adapt to the complexity of power battery temperature control and improve the overall performance of the system.

[0046] The technical solution in this embodiment realizes precise adjustment of the thermal management system of the power battery according to the dynamic temperature PID algorithm control method, and automatically adjusts the cold / heat exchange system of the power battery by continuously feeding back the difference between the current actual internal temperature of the power battery and the preset internal expected temperature, so as to maintain the actual internal temperature and the actual external temperature of the power battery within the appropriate temperature range of the power battery.

[0047] In one embodiment, Figure 2 As shown, step S13 includes the following steps S21-S23:

[0048] In step S21, when the actual internal temperature of the battery is lower than the preset expected internal temperature or the actual temperature difference is greater than or equal to the preset expected temperature difference, the heat exchange system is controlled to be turned on and the cold exchange system is turned off;

[0049] In step S22, the value of the preset expected internal temperature is increased, and the value of the preset expected temperature difference is decreased;

[0050] In step S23, the cold exchange system is controlled to be turned on and the heat exchange system is turned off until the actual internal temperature of the battery is greater than or equal to the preset expected internal temperature and the actual temperature difference is less than the preset expected temperature difference.

[0051] In one embodiment, the actual internal temperature of the power battery is detected and compared with the preset internal expected temperature. At the same time, the actual temperature difference between the actual internal temperature and the actual external temperature is calculated and compared with the preset temperature expected difference. If the actual internal temperature of the power battery is less than the preset internal expected temperature, or the actual temperature difference is greater than or equal to the preset temperature expected difference, the heat exchange system will be controlled to be turned on and the cold exchange system will be turned off, thereby increasing the temperature of the battery to reach or exceed the preset internal expected temperature, or reducing the internal and external temperature difference to be lower than the preset expected difference. Increase the value of the preset internal expected temperature and reduce the value of the preset temperature expected difference. Increase the operating temperature range of the battery so that it operates at a higher temperature while keeping the temperature difference within a safe expected range. Continue to adjust until the actual internal temperature of the battery is greater than or equal to the preset internal expected temperature, and the actual temperature difference is less than the preset temperature expected difference, control the cold exchange system to be turned on, and turn off the heat exchange system to prevent the power battery temperature from being too high, and reduce the temperature of the power battery through the cold exchange system to ensure that it operates within a safe range.

[0052] Through real-time monitoring and comparison, it is possible to determine whether the current temperature state of the power battery meets the preset conditions. When the power battery temperature is lower than expected or the temperature difference is too large, the heat exchange system is turned on to increase the power battery temperature, which prevents the power battery from working at low temperatures and affecting its performance and life. By adjusting the preset temperature and temperature difference values, it can adapt to different working environments and battery conditions, and improve its flexibility and adaptability. When the power battery temperature reaches or exceeds the preset value and the temperature difference is within the expected range, the cold exchange system is turned on to maintain the stability of the battery temperature to avoid safety hazards caused by overheating. Through the above-mentioned closed-loop control system, through dynamic monitoring, comparison, adjustment and control, it is ensured that the temperature of the power battery is controlled within an ideal range to improve the performance and safety of the battery.

[0053] In addition, thermal energy storage technology, such as using phase change materials (PCM) or thermal batteries, can be used to store the heat generated by the power battery when working at high loads and release this heat when needed. Not only can the power battery be protected from overheating, but the stored heat can also be used to preheat the battery in cold environments to improve the battery's operating efficiency. The stored thermal energy can also be used in other parts of the vehicle, such as cabin heating, thereby improving overall energy efficiency.

[0054] In one embodiment, Figure 3 As shown, step S13 also includes the following steps S31-S32:

[0055] In step S31, when the actual internal temperature of the battery is greater than or equal to the preset expected internal temperature and the actual temperature difference is less than the preset expected temperature difference, the cold exchange system is controlled to be turned on and the heat exchange system is turned off;

[0056] In step S32, the internal temperature is adjusted until the actual internal temperature is lower than the preset expected internal temperature and the actual temperature difference is smaller than the preset expected temperature difference.

[0057] In one embodiment, the power battery temperature is adjusted between the cold exchange system and the heat exchange system by a dynamic temperature PID algorithm to ensure that the battery temperature is controlled within a safe range. The temperature adjustment process is centered on the dynamic temperature PID algorithm, which monitors the temperature in real time and adjusts the cold / heat exchange system to ensure that the internal temperature of the power battery remains within the ideal range. The PID algorithm gradually adjusts the cold exchange system and the heat exchange system according to the temperature difference (the difference between actual and expected) to dynamically control the temperature change.

[0058] When the following two conditions are met, the cold exchange system will be activated and the hot exchange system will be turned off. The first condition is that the actual internal temperature is greater than or equal to the preset internal expected temperature, that is, the temperature inside the power battery exceeds or equals the set ideal temperature. The second condition is that the actual temperature difference is less than the preset temperature expected difference, that is, the difference between the internal and external temperatures is lower than the set ideal temperature difference range. The purpose is to start the cold exchange system to lower the internal temperature when the internal temperature of the power battery is too high, and shut down the hot exchange system to stop heating the battery. The cold exchange system lowers the internal temperature of the battery by exchanging heat until the temperature drops to the target range. Rapidly lower the temperature to prevent the battery temperature from being too high and affecting safety and performance. The actual internal temperature is lower than the preset internal expected temperature, that is, ensure that the internal temperature drops below the set ideal temperature. The actual temperature difference is less than the preset temperature expected difference, that is, keep the internal and external temperature difference within a safe range. When the power battery temperature reaches the preset ideal range, the cold exchange system stops adjusting to keep the battery temperature stable without further lowering the temperature.

[0059] The PID algorithm dynamically adjusts the cold exchange system by analyzing the temperature difference and internal temperature changes. When the temperature inside the power battery is too high and the temperature difference is small, the cold exchange system is activated to reduce the temperature and the heat exchange system is turned off. The adjustment process continues until the temperature returns to the target range, ensuring that the battery temperature is always maintained in a safe and stable state.

[0060] In addition to regulation based on real-time temperature data, intelligent temperature prediction algorithms (such as machine learning-based models) can be introduced to make predictions based on the historical temperature data of the power battery, operating conditions, external environmental factors (such as weather, driving conditions), etc. When it is predicted that the battery temperature may exceed the preset range in the future, the cold / heat exchange system is started in advance for pre-regulation. The power battery is divided into multiple temperature control zones, and fine-tuned regulation is performed for temperature changes in different areas. For example, different parts of the battery have different heat generation (such as hotter areas close to the battery cell), and the cold / heat exchange system can be independently adjusted according to the temperature data of each area to achieve zoned temperature control. Phase change materials are introduced into the battery pack. These materials can automatically absorb or release a large amount of heat when the temperature reaches a certain critical value to achieve passive temperature regulation. This can reduce dependence on the cold / heat exchange system while optimizing the temperature management of the battery. Phase change materials can be placed in areas close to heat sources in the battery pack to enhance balanced control of temperature.

[0061] In one embodiment, Figure 4 As shown, the following steps S41-S42 are also included:

[0062] In step S41, it is determined in real time whether the actual internal temperature is lower than the appropriate temperature threshold of the power battery;

[0063] In step S42, when the actual internal temperature is lower than the appropriate temperature threshold of the power battery, and the actual internal temperature is lower than the preset expected internal temperature and the actual temperature difference is less than the preset expected temperature difference, the operation of the cold / heat exchange system is temporarily stopped.

[0064] In one embodiment, it is determined in real time whether the actual internal temperature is lower than the appropriate temperature threshold of the power battery, and whether the temperature is lower than the set appropriate temperature threshold. The appropriate temperature threshold is a range set according to the optimal working conditions of the power battery to ensure that the battery has the best performance and safety when working within the temperature range. The temperature is continuously monitored to determine whether the next step of operation is required. If the temperature is in the appropriate range, no further adjustment measures are required immediately. On the basis of determining whether the actual internal temperature is lower than the appropriate temperature threshold, it is also necessary to determine whether the internal temperature is lower than the appropriate temperature threshold and whether it is lower than the set target temperature to ensure that the battery temperature does not reach an excessively high state. The actual temperature difference should also be less than the set temperature difference range to avoid excessive temperature differences affecting battery performance and safety. At the same time, it is also necessary to determine when to stop the operation of the cold / heat exchange system. When all the above conditions are met, the cold / heat exchange system will temporarily stop running, and the internal temperature of the power battery is in a stable and ideal state, and no external intervention is required for temperature adjustment. By temporarily stopping the operation of the cold / heat exchange system, the workload of the system is reduced, energy is saved, and unnecessary temperature regulation is avoided, thereby improving overall efficiency. Determine whether the actual internal temperature is lower than the appropriate temperature threshold, and then compare the actual internal temperature with the preset temperature. When the power battery temperature is within a reasonable range and the temperature difference is small, the cold / heat exchange system will be temporarily stopped to avoid unnecessary adjustments and energy consumption.

[0065] In one embodiment, Figure 5 FIG. 1 is a block diagram of a thermal management device for a power battery according to an exemplary embodiment. Figure 5 As shown, the thermal management device of the power battery includes an acquisition module 51, an analysis module 52 and a regulation module 53.

[0066] The acquisition module 51 is used to acquire the actual internal temperature and the actual external temperature of the power battery in real time, and calculate the actual temperature difference between the actual internal temperature and the actual external temperature;

[0067] The analysis module 52 is used to analyze in real time the numerical relationship between the actual internal temperature of the power battery and the preset internal expected temperature, and the numerical relationship between the actual temperature difference and the preset temperature expected difference;

[0068] The regulating module 53 is used to regulate the cold / heat exchange system of the power battery through a dynamic temperature PID algorithm to control the actual internal temperature to be lower than the preset internal expected temperature and the actual temperature difference to be smaller than the preset temperature expected difference.

[0069] The acquisition module 51 , the analysis module 52 and the adjustment module 53 included in the block diagram of the thermal management device for a power battery are controlled to execute the thermal management method for a power battery described in any of the above embodiments.

[0070] like Figure 6 As shown, the present invention provides an electronic device 600, the electronic device comprising: a communication interface, a processor 601, and a memory 602;

[0071] The memory 602 is used to store program instructions, and when the program instructions are executed by the processor 601 that is communicatively connected to the memory 602 through the communication interface, the actual internal temperature and the actual external temperature of the power battery are obtained in real time, and the actual temperature difference between the actual internal temperature and the actual external temperature is calculated; the numerical relationship between the actual internal temperature and the preset internal expected temperature of the power battery and the numerical relationship between the actual temperature difference and the preset temperature expected difference are analyzed in real time; and the cold / heat exchange system of the power battery is adjusted through a dynamic temperature PID algorithm to control the actual internal temperature to be lower than the preset internal expected temperature and the actual temperature difference to be smaller than the preset temperature expected difference. .

[0072] The present invention provides a computer-readable storage medium, on which a computer program instruction is stored. When the computer program instruction is executed by a processor, the actual internal temperature and the actual external temperature of a power battery are obtained in real time, and the actual temperature difference between the actual internal temperature and the actual external temperature is calculated; the numerical relationship between the actual internal temperature and the preset internal expected temperature of the power battery and the numerical relationship between the actual temperature difference and the preset temperature expected difference are analyzed in real time; and the cold / heat exchange system of the power battery is adjusted through a dynamic temperature PID algorithm to control the actual internal temperature to be lower than the preset internal expected temperature and the actual temperature difference to be smaller than the preset temperature expected difference. .

[0073] It should be understood that the specific features, operations and details described hereinabove about the method of the present invention may also be similarly applied to the device and system of the present invention, or, vice versa. In addition, each step of the method of the present invention described above may be performed by the corresponding parts or units of the device or system of the present invention.

[0074] It should be understood that each module / unit of the device of the present invention can be implemented in whole or in part by software, hardware, firmware or a combination thereof. Each module / unit can be embedded in the processor of the computer device in the form of hardware or firmware or independent of the processor, or can be stored in the memory of the computer device in the form of software for the processor to call to perform the operation of each module / unit. Each module / unit can be implemented as an independent component or module, or two or more modules / units can be implemented as a single component or module.

[0075] In one embodiment, a computer device is provided, which includes a memory and a processor, and the memory stores computer instructions executable by the processor, and the computer instructions instruct the processor to execute each step of the method of the embodiment of the present invention when executed by the processor. The computer device can be a server, a terminal, or any other electronic device with necessary computing and / or processing capabilities in a broad sense. In one embodiment, the computer device may include a processor, a memory, a network interface, a communication interface, etc. connected through a system bus. The processor of the computer device can be used to provide necessary computing, processing and / or control capabilities. The memory of the computer device may include a non-volatile storage medium and an internal memory. An operating system, a computer program, etc. may be stored in or on the non-volatile storage medium. The internal memory can provide an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface and the communication interface of the computer device can be used to connect and communicate with external devices through a network. The steps of the method of the present invention are executed by the processor.

[0076] The present invention may be implemented as a computer-readable storage medium having a computer program stored thereon, which causes the steps of the method of an embodiment of the present invention to be executed when executed by a processor. In one embodiment, the computer program is distributed on a plurality of computer devices or processors coupled to a network so that the computer program is stored, accessed, and executed in a distributed manner by one or more computer devices or processors. A single method step / operation, or two or more method steps / operations, may be performed by a single computer device or processor or by two or more computer devices or processors. One or more method steps / operations may be performed by one or more computer devices or processors, and one or more other method steps / operations may be performed by one or more other computer devices or processors. One or more computer devices or processors may perform a single method step / operation, or perform two or more method steps / operations.

[0077] It will be understood by those skilled in the art that the method steps of the present invention can be completed by instructing related hardware such as a computer device or a processor through a computer program, and the computer program can be stored in a non-temporary computer-readable storage medium, and the steps of the present invention are executed when the computer program is executed. Depending on the circumstances, any reference to memory, storage, database or other media herein may include non-volatile and / or volatile memory. Examples of non-volatile memory include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (according to the dynamic temperature PID algorithm control method, the thermal management system of the power battery is accurately adjusted, and the cold / heat exchange system of the power battery is automatically adjusted by continuously feeding back the difference between the current actual internal temperature of the power battery and the preset internal expected temperature, so as to maintain the actual internal temperature and the actual external temperature of the power battery within the appropriate temperature range of the power battery PROM), flash memory, magnetic tape, floppy disk, magneto-optical data storage device, optical data storage device, hard disk, solid state disk, etc. Examples of volatile memory include random access memory (RAM), external cache memory, etc.

[0078] The various technical features described above can be combined arbitrarily. Although all possible combinations of these technical features are not described, any combination of these technical features should be considered to be covered by this specification as long as there is no contradiction in such combination.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A thermal management method for a power battery, characterized in that: include: Acquire the actual internal temperature and the actual external temperature of the power battery in real time, and calculate the actual temperature difference between the actual internal temperature and the actual external temperature; Real-time analysis of the numerical relationship between the actual internal temperature of the power battery and the preset expected internal temperature, and the numerical relationship between the actual temperature difference and the preset expected temperature difference; Through the dynamic temperature PID algorithm, the cold / heat exchange system of the power battery is adjusted to control the actual internal temperature to be lower than the preset internal expected temperature and the actual temperature difference to be smaller than the preset temperature expected difference.

2. The thermal management method of a power battery according to claim 1, characterized in that: The method of adjusting the cold / heat exchange system of the power battery by the dynamic temperature PID algorithm includes: When the actual internal temperature of the battery is lower than the preset expected internal temperature or the actual temperature difference is greater than or equal to the preset expected temperature difference, the heat exchange system is controlled to be turned on and the cold exchange system is turned off; Increasing the value of the preset expected internal temperature and decreasing the value of the preset expected temperature difference; Adjust until the actual internal temperature of the battery is greater than or equal to the preset internal expected temperature and the actual temperature difference is less than the preset temperature expected difference, control to turn on the cold exchange system, and turn off the heat exchange system.

3. The thermal management method of a power battery according to claim 1, characterized in that: The method of adjusting the cold / heat exchange system of the power battery by the dynamic temperature PID algorithm also includes: When the actual internal temperature of the battery is greater than or equal to the preset expected internal temperature and the actual temperature difference is less than the preset expected temperature difference, controlling to turn on the cold exchange system and turn off the heat exchange system; The adjustment is performed until the actual internal temperature is lower than the preset expected internal temperature and the actual temperature difference is smaller than the preset expected temperature difference.

4. The thermal management method of a power battery according to claims 1-3, characterized in that: Also includes: Determining in real time whether the actual internal temperature is lower than a suitable temperature threshold of the power battery; When the actual internal temperature is lower than the appropriate temperature threshold of the power battery, and the actual internal temperature is lower than the preset expected internal temperature and the actual temperature difference is less than the preset expected temperature difference, the operation of the cold / heat exchange system is temporarily stopped.

5. The thermal management method of a power battery according to claim 1, characterized in that: Also includes: The temperature of the power battery is controlled by a heat exchanger and a condenser in a cold / heat exchange system.

6. The thermal management method of a power battery according to claim 1, characterized in that: Also includes: An air inlet is arranged at the lower end of the power battery, and an air outlet is arranged at the upper end of the power battery; The air entering the air inlet first passes through the temperature control area and then passes through the convection heat exchange area to achieve heat exchange of the air.

7. A thermal management device for a power battery, characterized in that: include: An acquisition module, used to acquire the actual internal temperature and the actual external temperature of the power battery in real time, and calculate the actual temperature difference between the actual internal temperature and the actual external temperature; An analysis module, used for analyzing in real time the numerical relationship between the actual internal temperature of the power battery and the preset expected internal temperature, and the numerical relationship between the actual temperature difference and the preset expected temperature difference; The regulating module is used to regulate the cold / heat exchange system of the power battery through a dynamic temperature PID algorithm to control the actual internal temperature to be lower than a preset internal expected temperature and the actual temperature difference to be smaller than a preset temperature expected difference.

8. The thermal management device of the power battery according to claim 7, characterized in that: The acquisition module, the analysis module and the adjustment module are controlled to execute the thermal management method for a power battery according to any one of claims 1 to 6.

9. An electronic device, characterized in that: include: Communication interface, processor, memory; Wherein, the memory is used to store program instructions, and when the program instructions are executed by the processor that is communicatively connected to the memory through the communication interface, the electronic device implements the thermal management method for a power battery according to any one of claims 1 to 6.

10. A computer-readable storage medium having program instructions stored thereon, characterized in that: When the program instructions are executed by a computer, the computer implements the thermal management method for a power battery according to any one of claims 1 to 6.

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