Battery thermal management method and device combining composite phase change material and adsorption heat pump

Abstract

The invention provides a battery thermal management method and device combining a composite phase change material and an adsorption heat pump, and relates to the technical field of battery thermal management, the method is applied to the battery thermal management device, and the battery thermal management device absorbs heat generated by a battery pack of an energy storage battery through the composite phase change material, and stores the heat generated by the battery pack through the adsorption heat pump. The battery heat management device is used for cooling and heating the battery pack through an adsorption type heat pump; the method comprises the following steps: acquiring the temperature of the battery pack; controlling the composite phase change material to absorb heat generated by the battery pack based on the temperature of the battery pack; obtaining the temperature of the composite phase change material; and controlling the adsorption heat pump to cool the battery pack based on the temperature of the composite phase change material. According to the invention, a composite phase change material and an adsorption type heat pump adsorption and desorption technology can be combined, so that the control on the temperature of the energy storage battery cell and the efficient energy-saving operation of the energy storage battery cell are realized.

Description

Technical Field

[0001] The present application relates to the technical field of battery thermal management, and in particular to a battery thermal management method and device combining a composite phase change material and an adsorption heat pump. Background Art

[0002] Battery thermal management technology for energy storage batteries is an important component to ensure the safety, efficiency and long life of the battery system. Moreover, with the widespread application of renewable energy and the rapid development of the electric vehicle market, the demand for thermal management of energy storage batteries is becoming more urgent.

[0003] Among the related technologies, air cooling, liquid cooling, thermoelectric cooling and heat pipe technology are mostly used for thermal management of energy storage batteries. Among them, air cooling removes heat through fans or natural convection, which has a simple structure and low cost, but has low efficiency and is difficult to maintain uniform temperature; liquid cooling uses coolant circulation, which is efficient and can evenly control the temperature, but has a complex structure, high cost, and needs to prevent leakage; thermoelectric cooling uses thermoelectric materials to transfer heat, which can achieve precise temperature control, but efficiency and power consumption issues make it unsuitable for large-scale applications; heat pipe technology quickly and evenly dissipates heat through evaporation and condensation of the working liquid, with high heat transfer efficiency, but high design and manufacturing costs. Summary of the invention

[0004] The main purpose of the embodiments of the present application is to propose a battery thermal management method and device that combines composite phase change materials and adsorption heat pumps, aiming to control the temperature of energy storage battery cells and achieve efficient and energy-saving operation of energy storage battery cells by combining composite phase change materials and adsorption heat pump adsorption and desorption technology.

[0005] To achieve the above-mentioned purpose, a first aspect of an embodiment of the present application proposes a battery thermal management method using a composite phase change material and an adsorption heat pump. The method is applied to a battery thermal management device. The battery thermal management device absorbs the heat generated by a battery pack of an energy storage battery through a composite phase change material, and the battery thermal management device cools down and heats up the battery pack through an adsorption heat pump. The method comprises:

[0006] Acquiring the temperature of the battery pack;

[0007] Controlling the composite phase change material to absorb heat generated by the battery pack based on the temperature of the battery pack;

[0008] Acquiring the temperature of the composite phase change material;

[0009] Based on the temperature of the composite phase change material, the adsorption heat pump is controlled to cool the battery pack.

[0010] In some embodiments, controlling the composite phase change material to absorb heat generated by the battery pack based on the temperature of the battery pack includes:

[0011] determining an operating state of the battery pack based on a temperature of the battery pack;

[0012] When the working state of the battery pack indicates that the battery pack is working under a preset high temperature condition, the composite phase change material is controlled to absorb heat generated by the battery pack.

[0013] In some embodiments, based on the temperature of the composite phase change material, controlling the adsorption heat pump to cool the battery pack includes:

[0014] When the temperature of the composite phase change material is greater than or equal to a preset phase change material high temperature threshold, the evaporator of the adsorption heat pump is controlled to start to reduce the temperature of the battery pack.

[0015] In some embodiments, the method further comprises at least one of the following:

[0016] Controlling the adsorption heat pump to increase the temperature of the battery pack based on the temperature of the battery pack;

[0017] Based on the temperature of the battery pack, the adsorption heat pump is controlled to cool the battery pack.

[0018] In some embodiments, controlling the adsorption heat pump to increase the temperature of the battery pack based on the temperature of the battery pack includes:

[0019] When the temperature of the battery pack is less than or equal to a preset battery low temperature threshold, the condenser of the adsorption heat pump is controlled to be started to increase the temperature of the battery pack.

[0020] In some embodiments, after the controlling starts the condenser of the adsorption heat pump to increase the temperature of the battery pack, the method further includes:

[0021] When the temperature of the battery pack is greater than or equal to a preset temperature limit, the condenser is controlled to be turned off, so as to maintain the battery pack operating under a preset suitable temperature condition based on the heat generated by the battery pack.

[0022] In some embodiments, based on the temperature of the battery pack, controlling the adsorption heat pump to cool the battery pack includes:

[0023] When the temperature of the battery pack is greater than or equal to a preset battery high temperature threshold, the evaporator of the adsorption heat pump is controlled to start to reduce the temperature of the battery pack.

[0024] To achieve the above-mentioned purpose, a second aspect of an embodiment of the present application proposes a battery thermal management device combining a composite phase change material and an adsorption heat pump, the battery thermal management device comprising:

[0025] Battery packs for energy storage batteries;

[0026] A composite phase change material device, the composite phase change material device is used to absorb heat generated by the battery pack through a composite phase change material;

[0027] An adsorption heat pump device, the adsorption heat pump device is used to cool down and heat up the battery pack;

[0028] A temperature monitoring device, the temperature monitoring device is used to monitor the temperature of the battery pack and the composite phase change material;

[0029] A control terminal, wherein the control terminal controls the composite phase change material device to absorb heat generated by the battery pack through the composite phase change material based on the temperature of the battery pack, and controls the adsorption heat pump device to cool down and heat up the battery pack based on the temperature of the battery pack and / or the temperature of the composite phase change material.

[0030] To achieve the above-mentioned purpose, the third aspect of an embodiment of the present application proposes a computer device, which includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, it implements the steps of the battery thermal management method combining composite phase change materials and adsorption heat pumps as provided in the first aspect above.

[0031] To achieve the above-mentioned purpose, the fourth aspect of an embodiment of the present application proposes a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements the steps of the battery thermal management method combining composite phase change materials and adsorption heat pumps as provided in the second aspect above.

[0032] To achieve the above-mentioned purpose, the fifth aspect of an embodiment of the present application proposes a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements the various steps of the battery thermal management method combining composite phase change materials and adsorption heat pumps as provided in the second aspect above.

[0033] The embodiments of the present application propose a battery thermal management method, a battery thermal management device, a computer device, a computer-readable storage medium, and a computer program product that combine a composite phase change material and an adsorption heat pump. The battery thermal management method is applied to the battery thermal management device, and the battery thermal management device absorbs the heat generated by a battery pack of an energy storage battery through a composite phase change material, and the battery thermal management device cools down and heats up the battery pack through an adsorption heat pump; the battery thermal management method includes obtaining the temperature of the battery pack; controlling the composite phase change material to absorb the heat generated by the battery pack based on the temperature of the battery pack; obtaining the temperature of the composite phase change material; and controlling the adsorption heat pump to cool down the battery pack based on the temperature of the composite phase change material.

[0034] That is to say, the embodiment of the present application cools the battery pack by first activating the composite phase change material in a relatively high temperature environment to absorb a large amount of heat emitted by the battery pack, thereby facilitating the operation of the battery pack. Afterwards, when the battery pack continues to release heat until the temperature exceeds the storage limit of the composite phase change material, the adsorption heat pump is controlled to start working, so as to continuously cool the battery pack by using the evaporator refrigeration. Thus, the embodiment of the present application realizes the temperature control of the energy storage battery cell by combining the composite phase change material and the adsorption heat pump adsorption and desorption technology, and the efficient and energy-saving operation of the energy storage battery cell.

[0035] In addition, the embodiment of the present application enables the battery pack to maintain a relatively constant temperature for a certain period of time by first activating the composite phase change material to absorb the heat generated by the battery pack, thereby reducing the use of the cooling system, thereby increasing the service life of the battery pack while saving energy. When the temperature of the battery pack exceeds the limit or exceeds the energy storage limit of the composite phase change material, the embodiment of the present application activates the refrigeration function of the adsorption heat pump to continue cooling the battery, thereby also achieving the control of the temperature of the battery pack to maintain stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of the structure of a battery thermal management device using a composite phase change material and an adsorption heat pump in some embodiments of the present application;

[0037] Figure 2 A schematic diagram of the working logic of a battery thermal management device using a composite phase change material and an adsorption heat pump in some embodiments provided in the present application;

[0038] Figure 3 A schematic flow chart of the steps in some embodiments of the battery thermal management method using a composite phase change material and an adsorption heat pump provided in the embodiments of the present application;

[0039] Figure 4A schematic diagram of the operation flow of a battery thermal management method combining a composite phase change material and an adsorption heat pump in a complete embodiment of the present application;

[0040] Figure 5 A schematic diagram of the internal structure of a computer device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0042] It should be noted that, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first", "second", etc. in the specification, claims and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0044] Before introducing the embodiments of the present application, the overall concept of the embodiments of the present application is first described.

[0045] As one of the essential energy storage solutions in modern society, batteries have the advantages of high energy density, long life and low self-discharge rate, and have been widely used in new energy vehicles and energy storage power stations. As users' demand for battery performance and power increases, the performance degradation and safety issues caused by heat during battery charging and discharging are becoming more and more serious.

[0046] When the battery is working, various electrochemical reactions will occur to generate heat. If the temperature is too high or unevenly distributed, it will cause its performance to decline or even cause overheating. In addition, when the battery is working in a relatively cold area, the battery temperature is too low, which will also reduce its discharge performance, resulting in a sharp decrease in discharge capacity. It is generally believed that the suitable operating temperature range of the battery is -20℃~50℃, the optimal operating temperature range is 15℃~35℃, and the temperature difference between battery modules should be kept within 5℃ (to prevent uneven temperature distribution). In order to improve battery performance, extend life and ensure safety, it is urgent to develop an efficient battery thermal management system that covers a wide temperature range.

[0047] Battery thermal management technology for energy storage batteries is an important part of ensuring the safety, efficiency and long life of battery systems. With the widespread application of renewable energy and the rapid development of the electric vehicle market, the demand for battery thermal management technology has become more urgent. Current battery thermal management technologies mainly include air cooling, liquid cooling, thermoelectric cooling, heat pipe technology and phase change material (PCM) device heat absorption technology. Among them, air cooling removes heat through fans or natural convection, which has a simple structure and low cost, but low efficiency and difficulty in maintaining uniform temperature; liquid cooling uses coolant circulation, which has high efficiency and can evenly control temperature, but has a complex structure, high cost, and needs to prevent leakage; thermoelectric cooling uses thermoelectric materials for heat transfer, which can achieve precise temperature control, but efficiency and power consumption issues make it unsuitable for large-scale applications; heat pipe technology quickly and evenly dissipates heat through the evaporation and condensation of the working liquid, with high heat transfer efficiency, but high design and manufacturing costs; finally, phase change material devices can effectively regulate battery temperature through their own phase change characteristics, with strong stability and improved safety. In particular, solid-liquid phase change materials have high latent heat and suitable phase change temperature, which are very suitable for thermal management of lithium batteries and can also be used in combination with other cooling systems. In the thermal management of energy storage batteries, the composite phase change material device can avoid starting the cooling device within a certain temperature range, and only start when the temperature exceeds the temperature limit of the interval, thereby reducing the energy consumption of the battery thermal management system. This innovative application not only improves energy efficiency, but also provides a guarantee for the long-term stability of the battery.

[0048] Although pure solid-liquid phase change materials have high latent heat, stable phase change temperature and chemical properties, they are prone to leakage during the solid-liquid conversion process, which places high demands on the quality of the packaging shell. In addition, the thermal conductivity of solid-liquid phase change materials is low, which limits their performance in practical applications. However, after compounding the phase change material with the nanoframe material, it can not only effectively solve the leakage problem, but also effectively improve its thermal conductivity, making it perform better in battery thermal management. Due to the strong interaction, the phase change material in the composite material is firmly adsorbed in the frame during the entire phase change process. It is worth noting that battery thermal management not only has to deal with high temperature environments, but also needs to consider low temperature working conditions. Under low temperature conditions, an adsorption heat pump device with a metal organic framework as an adsorbent can be added to the surface of the battery, and the condenser can be used to release heat to increase the battery temperature. This innovative design not only optimizes the thermal management of the battery, but also ensures the stability and performance of the battery under various temperature conditions.

[0049] Based on the above ideas, the embodiment of the present application considers combining energy storage batteries, temperature monitoring devices, control terminals, liquid circulation pipelines, composite phase change materials and adsorption heat pumps with metal organic frameworks as adsorbents to form a battery thermal management device that combines composite phase change materials and adsorption heat pumps. In a relatively high temperature environment, the composite phase change material device is activated to absorb a large amount of heat emitted by the battery, cool the battery, and is beneficial to the operation of the battery. When the temperature exceeds the limit (for example, 45°C to 50°C) or exceeds the storage limit of the composite phase change material, the adsorption heat pump starts to work and uses the evaporator to cool the battery continuously; in a relatively low temperature environment, the condenser in the heat pump starts to work, and the device can continuously release heat to heat up the energy storage battery and maintain it in a suitable temperature range. A specific example is that when the energy storage battery is working in a relatively high temperature environment, the battery continues to discharge and the temperature rises. At this time, the composite phase change material is used to absorb heat, so that the battery pack maintains a relatively constant temperature for a certain period of time, reducing the use of the cooling system, saving energy, and increasing the service life of the battery. When the temperature exceeds the limit or the energy storage limit of the composite phase change material, the refrigeration function of the adsorption heat pump is activated to continue cooling the battery and control the battery temperature to maintain stability. Another specific example is that when the energy storage battery works in a relatively low temperature environment, the battery operating temperature is far below its optimal operating temperature range (15°C to 35°C). At this time, the condenser is turned on to release a large amount of heat, so that the battery temperature works in a suitable temperature range, thereby increasing the battery discharge capacity and improving the mileage of the tram.

[0050] The technology provided in the embodiments of the present application has a series of advantages such as energy saving and environmental protection, heat storage, safety and reliability, and ease of use, and can be vigorously promoted and implemented in energy storage battery thermal management systems.

[0051] Based on the overall concept of the above-mentioned embodiments of the present application, various embodiments of a battery thermal management device combining a composite phase change material and an adsorption heat pump provided in the embodiments of the present application are further proposed.

[0052] Please refer to Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of a battery thermal management device using a composite phase change material and an adsorption heat pump in some embodiments of the present application, Figure 2 A schematic diagram of the working logic of a battery thermal management device combining a composite phase change material and an adsorption heat pump in some embodiments of the present application.

[0053] like Figure 1 As shown, in some embodiments, the battery thermal management device using a composite phase change material and an adsorption heat pump provided in the embodiments of the present application includes: a battery pack of energy storage batteries;

[0054] A composite phase change material device, the composite phase change material device is used to absorb heat generated by the battery pack through a composite phase change material;

[0055] An adsorption heat pump device, the adsorption heat pump device is used to cool down and heat up the battery pack;

[0056] A temperature monitoring device, the temperature monitoring device is used to monitor the temperature of the battery pack and the composite phase change material;

[0057] A control terminal, wherein the control terminal controls the composite phase change material device to absorb heat generated by the battery pack through the composite phase change material based on the temperature of the battery pack, and controls the adsorption heat pump device to cool down and heat up the battery pack based on the temperature of the battery pack and / or the temperature of the composite phase change material.

[0058] The battery thermal management device monitors the temperature of the battery pack and the composite phase change material in real time through the temperature monitoring device, and uploads the real-time data to the control terminal. The control terminal mainly coordinates the working status of each part of the device based on the real-time data feedback from the temperature monitoring device and / or the information feedback from other devices to ensure the safety of the overall system. For example, the control terminal controls the opening of the evaporator and condenser of the adsorption heat pump by issuing instructions to the adsorption heat pump device, thereby achieving cooling and heating of the battery pack.

[0059] When the battery thermal management device is working, it adopts different logics based on the different environments where the energy storage battery is located. Figure 2 As shown, in a high temperature environment: when the energy storage battery works under high temperature conditions, it will generate heat. The battery thermal management device controls the start-up of the composite phase change material device through the control terminal to absorb and store the heat generated by the battery pack. Due to the characteristics of the phase change material, its temperature change is limited. The temperature monitoring device monitors the temperature of the composite phase change material in real time and feeds back to the control terminal. When the temperature of the composite phase change material continues to rise to the energy storage capacity limit or the heat generated by the battery pack causes the battery pack temperature to exceed a certain temperature limit (such as 45°C to 50°C), the control terminal controls the opening of the evaporator of the adsorption heat pump and uses its refrigeration capacity to continue to cool the battery. Compared with traditional thermal management systems for energy storage batteries, this process has lower energy consumption and is more environmentally friendly. In addition, as Figure 2As shown in the figure, in a low temperature environment: when the temperature of the battery pack is lower than the optimal operating temperature range, its discharge capacity will drop significantly. In this case, the composite phase change material is in a solid state and cannot exert its characteristics. Therefore, the control terminal sends a signal to directly open the condenser of the adsorption heat pump. The condenser will release a large amount of heat during the condensation process to increase the temperature of the battery pack, so that the energy storage battery can work within a suitable temperature range. At the same time, the temperature monitoring device feeds back real-time data (the temperature of the battery pack) to the control terminal. When the temperature of the battery pack rises to an acceptable lower limit (such as -20°C), since the energy storage battery will generate heat when working together, the control terminal can turn off the condenser at this time, so that the heat generated by the condenser gradually decreases. In this way, the battery thermal management device provides effective thermal management for the battery in a low temperature environment by condensing heat, showing great application potential and meeting the needs of modern battery thermal management.

[0060] It should be noted that when the energy storage battery is in a high temperature state, the operation of the composite phase change material is divided into two states, namely latent heat and sensible heat. During the latent heat process, the composite phase change material absorbs a large amount of heat, and the overall temperature does not change much. During the sensible heat process, the composite phase change material changes from solid to liquid, which is manifested as the temperature of the composite phase change material gradually rising. At this time, the control terminal sends a signal to enable the refrigeration function of the adsorption heat pump device, that is, the evaporator continues to work and absorbs a large amount of heat emitted when the battery is working. In this way, the frequency of use of the cooling device can be reduced in the entire process of thermal management of the battery, which is more energy-saving and efficient as a whole. In addition, when the battery is in a low temperature state, the control terminal directly controls the condenser of the adsorption heat pump to release a large amount of heat through the condensation of water vapor to raise the temperature of the battery pack so that the energy storage battery works in a suitable temperature range and improves the discharge capacity of the battery pack.

[0061] In some embodiments, the framework material in the composite phase change material device is generally selected from metal organic framework materials (MOF), covalent organic framework materials (COFs), carbon nanotubes and other porous materials with good thermochemical stability and high specific surface area.

[0062] In some embodiments, the composite phase change material may be selected from materials such as polyethylene glycol (PEG) and paraffin (PW) that have good stability, high latent heat, are easily available, and are low in cost.

[0063] In some embodiments, the adsorbent in the metal organic framework-based adsorption heat pump device can be selected as MIP-200, which exhibits a strong ability to absorb water.

[0064] It should be noted that the adsorption heat pump device mainly uses a liquid circulation pipeline for circulating water vapor and liquid water in the adsorption heat pump.

[0065] In the embodiment of the present application, the battery thermal management device performs two stages of thermal management operations when the energy storage battery is in the high-temperature working stage: Stage 1: Only the composite phase change material device is used to absorb the heat emitted by the battery pack, and Stage 2: The continuous refrigeration function of the adsorption heat pump device is enabled, and the heat is continuously absorbed by the evaporator for evaporation of liquid water to cool the battery. Among them, Stage 2 is further divided into two parts: When the battery temperature is in an appropriate range, the battery emits heat, and the composite phase change material device cannot effectively absorb it. At this time, the material temperature gradually rises, and the control terminal controls the opening of the refrigeration function of the adsorption heat pump device. When the composite phase change material device still has the absorption capacity, if the temperature of the battery pack exceeds the appropriate range, although the material temperature fluctuates slightly, the temperature of the battery pack still gradually rises. At this time, the control terminal also uses the refrigeration function of the adsorption heat pump device to maintain the safety of the battery pack. Based on this, the embodiment of the present application can achieve effective energy saving of energy storage batteries. In addition, the embodiment of the present application also uses a battery thermal management device to perform two stages of thermal management operations when the energy storage battery is working at a low temperature: Stage 1: When the temperature of the battery pack is lower than the acceptable lower limit (-20°C), the control terminal sends a signal to open the condenser of the adsorption heat pump device (when the condenser is not working, it can absorb heat energy from the environment such as solar energy and use it to store energy for the adsorption bed). At this time, the condenser will release heat, thereby increasing the temperature of the battery pack and allowing the energy storage battery to work in a suitable temperature range. Since the discharge capacity of the battery pack at normal temperature is higher than the discharge capacity of the battery pack at low temperature, this helps to save energy. Stage 2: When the adsorption bed releases too much heat, the energy storage battery itself will generate heat when it is working, so the control terminal sends a signal to shut down the condenser device of the adsorption heat pump device.

[0066] That is to say, the embodiment of the present application stores thermal energy through a composite phase change material device to timely absorb the heat emitted by the battery, and synergizes the composite phase change material device with an adsorption heat pump device, thereby reducing the energy consumption of the electric vehicle, increasing the battery discharge capacity, and extending the service life of the battery pack.

[0067] Next, based on the various embodiments of the battery thermal management device combining composite phase change materials and adsorption heat pumps provided in the above-mentioned embodiments of the present application, embodiments of the battery thermal management method combining composite phase change materials and adsorption heat pumps provided in the application embodiments are further proposed.

[0068] It should be understood that the battery thermal management method using a composite phase change material and an adsorption heat pump provided in the embodiment of the present application can be applied to a terminal, can be applied to a server, and can also be software running in a terminal or a server. In some embodiments, the terminal can be a smart phone, a tablet computer, a laptop computer, a desktop computer, etc.; the server can be configured as an independent physical server, or a server cluster or a distributed system composed of multiple physical servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms; the software can be an application that implements the battery thermal management method, etc., but is not limited to the above forms.

[0069] Alternatively, the present application may also be used in numerous general or special computer system environments or configurations. For example: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer computer devices, network PCs, minicomputers, mainframe computers, distributed computing environments including any of the above systems or devices, and the like. The present application may be described in the general context of computer executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, and the like that perform specific tasks or implement specific abstract data types.

[0070] For ease of understanding and explanation, the following text will use the battery thermal management method of the battery thermal management device using the composite phase change material and the adsorption heat pump provided in the embodiment of the present application as an example to explain the present application in detail. The implementation of the battery thermal management method provided in the embodiment of the present application in any of the above-mentioned forms of the subject application can refer to the implementation process of the battery thermal management method described below.

[0071] Please refer to Figure 3 , Figure 3 A schematic diagram of the steps of the battery thermal management method using a composite phase change material and an adsorption heat pump in some embodiments of the present application. It should be understood that although Figure 3 The execution order of some method steps is shown in the figure, but based on different design requirements of actual applications, the battery thermal management method provided in the embodiment of the present application can certainly adopt an execution order different from the method steps shown in the figure. That is, Figure 3 The order of the method steps shown does not constitute a limitation on the execution logic order of the battery thermal management method provided in the embodiment of the present application. Figure 3 Reasonable changes in the order of the method steps shown should be included in the protection scope of the battery thermal management method provided in the embodiments of the present application.

[0072] like Figure 3 As shown, in some embodiments, the battery thermal management method using a composite phase change material and an adsorption heat pump provided in the embodiments of the present application may include steps S301 to S304.

[0073] Step S301: Acquire the temperature of the battery pack.

[0074] It should be noted that the battery thermal management device using the battery thermal management method provided in the embodiments of the present application, such as the battery thermal management device using a composite phase change material and an adsorption heat pump as mentioned in the above embodiments, mainly absorbs the heat generated by the battery pack of the energy storage battery through the composite phase change material, and cools and heats the battery pack through the adsorption heat pump.

[0075] The battery thermal management device continuously monitors the temperature of the battery pack through the temperature monitoring device during the operation of the energy storage battery. In addition, the battery thermal management device also transmits the real-time data obtained by continuously monitoring the temperature of the battery pack to the control terminal through the temperature monitoring device.

[0076] Step S302: controlling the composite phase change material to absorb heat generated by the battery pack based on the temperature of the battery pack.

[0077] After obtaining the temperature of the battery pack, the battery thermal management device sends instructions to control the composite phase change material device to absorb the heat generated by the battery pack using the composite phase change material when the temperature exceeds the appropriate operating temperature range through the control terminal.

[0078] It should be noted that the battery thermal management device controls the composite phase change material device through the control terminal to use the composite phase change material to absorb the heat generated by the battery pack, and this needs to be done when the composite phase change material has the absorption capacity.

[0079] Step S303: obtaining the temperature of the composite phase change material.

[0080] After the battery thermal management device absorbs the heat generated by the battery pack with the composite phase change material, it also continuously monitors the temperature of the composite phase change material through the temperature monitoring device, and transmits the real-time data obtained by monitoring the temperature of the composite phase change material to the control terminal through the temperature monitoring device.

[0081] Step S304: Based on the temperature of the composite phase change material, controlling the adsorption heat pump to cool the battery pack.

[0082] After the battery thermal management device obtains the temperature of the composite phase change material, if the temperature of the composite phase change material indicates that the composite phase change material can no longer effectively store heat (for example, the temperature of the battery pack continues to rise and exceeds the energy storage capacity limit of the composite phase change material), the battery thermal management device sends a signal through the control terminal to control the adsorption heat pump (the above-mentioned adsorption heat pump device) to start working, so as to open the evaporator of the adsorption heat pump and use the refrigeration capacity of the evaporator to continue to cool the battery pack.

[0083] In the embodiment of the present application, when the energy storage battery is working in a relatively high temperature environment, the battery thermal management device first activates the composite phase change material to absorb a large amount of heat emitted by the battery pack, cools the battery pack, and is beneficial to the operation of the battery pack. Afterwards, when the battery pack continues to release heat until the temperature exceeds the storage limit of the composite phase change material, the adsorption heat pump is controlled to start working, so as to continuously cool the battery pack by using the evaporator refrigeration. In this way, the temperature of the energy storage battery cell is controlled by combining the composite phase change material and the adsorption heat pump adsorption and desorption technology, and the energy storage battery cell is operated efficiently and energy-savingly.

[0084] In addition, by first activating the composite phase change material to absorb the heat generated by the battery pack through the battery thermal management device, the battery pack can maintain a relatively constant temperature for a certain period of time, reducing the use of the cooling system, thereby saving energy and increasing the service life of the battery pack. When the temperature of the battery pack exceeds the limit or exceeds the energy storage limit of the composite phase change material, the battery thermal management device activates the cooling function of the adsorption heat pump to continue cooling the battery, which also achieves the control of the battery pack temperature to maintain stability.

[0085] In some embodiments, the above step S102: controlling the composite phase change material to absorb heat generated by the battery pack based on the temperature of the battery pack may include the following steps:

[0086] determining an operating state of the battery pack based on a temperature of the battery pack;

[0087] When the working state of the battery pack indicates that the battery pack is working under a preset high temperature condition, the composite phase change material is controlled to absorb heat generated by the battery pack.

[0088] After obtaining the temperature of the battery pack, the battery thermal management device confirms the working state of the battery pack through the temperature. When the temperature of the battery pack is lower than the optimal working temperature range (15℃~35℃), the working state of the battery pack is confirmed to be the state of working in a relatively low temperature environment, and when the temperature of the battery pack is higher than the optimal working temperature range (15℃~35℃), the working state of the battery pack is confirmed to be the state of working in a high temperature environment, which indicates that the battery pack is working under the preset high temperature conditions.

[0089] When the working state of the battery pack indicates that the battery pack is working under a preset high temperature condition, the battery thermal management device immediately controls the composite phase change material device through the control terminal to use the composite phase change material to start absorbing the heat generated by the battery pack.

[0090] In some embodiments, due to the characteristics of the composite phase change material itself, its temperature change is limited. Therefore, when the composite phase change material begins to absorb the heat generated by the battery pack, the battery thermal management device continues to monitor whether the temperature of the battery pack has exceeded the energy storage capacity limit of the composite phase change material, and when it is confirmed that the temperature of the battery pack exceeds the energy storage capacity limit of the composite phase change material, the adsorption heat pump continues to cool the battery pack.

[0091] Based on this, the above step S104: controlling the adsorption heat pump to cool the battery pack based on the temperature of the composite phase change material may include the following steps:

[0092] When the temperature of the composite phase change material is greater than or equal to a preset phase change material high temperature threshold, the evaporator of the adsorption heat pump is controlled to start to reduce the temperature of the battery pack.

[0093] It should be noted that the preset phase change material high temperature threshold is the temperature of the composite phase change material when the heat of the battery pack absorbed by the composite phase change material reaches its energy storage capacity limit. It should be understood that based on different design requirements of actual applications, in different feasible embodiments, with the different specific types of composite phase change materials used, the phase change material high temperature threshold indicating its energy storage capacity limit is of course different. The battery thermal management method provided in the embodiment of the present application does not limit the specific size of the preset phase change material high temperature threshold.

[0094] When the battery thermal management device begins to absorb the heat generated by the battery pack using the composite phase change material, the temperature of the composite phase change material will rise, and as the battery pack continues to generate heat, the temperature of the composite phase change material will continue to rise. When the battery thermal management device monitors the temperature of the composite phase change material through the temperature monitoring device, if it is found that the temperature of the composite phase change material is greater than or equal to the preset phase change material high temperature threshold, the battery thermal management device determines that the current composite phase change material has absorbed the heat of the battery pack to its energy storage capacity limit. In this case, the battery thermal management device controls the adsorption heat pump to start the evaporator through the control terminal to use its refrigeration capacity to continue to cool the battery, thereby reducing the temperature of the battery pack.

[0095] In this embodiment, when the working state of the battery pack indicates that the battery pack is working under a preset high temperature condition, the battery thermal management device immediately controls the composite phase change material device through the control terminal to use the composite phase change material to start absorbing the heat generated by the battery pack. Afterwards, when the temperature of the composite phase change material is greater than or equal to the preset phase change material high temperature threshold (the heat absorbed by the composite phase change material of the battery pack has reached its energy storage capacity limit), the battery thermal management device controls the adsorption heat pump to start the evaporator through the control terminal to use its refrigeration capacity to continue cooling the battery, thereby reducing the temperature of the battery pack.

[0096] Compared with the traditional way of thermal management of energy storage batteries, this embodiment combines composite phase change materials and adsorption heat pumps to cool the storage batteries when they work in a high-temperature environment, requiring lower energy consumption and being more environmentally friendly.

[0097] In some embodiments, the battery thermal management device can directly use an adsorption heat pump to heat the battery in a low temperature environment. In addition, when the temperature of the battery pack exceeds a certain temperature of the battery (45°C to 50°C), the battery thermal management device can also directly use an adsorption heat pump to cool the battery.

[0098] Based on this, the battery thermal management method provided in the embodiment of the present application may also include at least one of the following:

[0099] Controlling the adsorption heat pump to increase the temperature of the battery pack based on the temperature of the battery pack;

[0100] Based on the temperature of the battery pack, the adsorption heat pump is controlled to cool the battery pack.

[0101] Among them, when the battery thermal management device continuously monitors the temperature of the battery pack through the temperature monitoring device, if it is determined based on the temperature of the battery pack that the energy storage battery is working in a low temperature environment, because the composite phase change material is in a solid state at this time and cannot exert its characteristics, the battery thermal management device immediately controls the adsorption heat pump through the control terminal to heat up the battery pack. In addition, when the temperature of the battery pack exceeds a certain temperature of the battery (45℃~50℃), causing the composite phase change material to be unable to continue to absorb the heat of the battery and store it, the battery thermal management device also controls the adsorption heat pump through the control terminal to cool down the battery pack.

[0102] In some embodiments, when the battery thermal management device controls the adsorption heat pump to heat the battery pack based on the temperature of the battery pack, the battery thermal management device may perform the following steps:

[0103] When the temperature of the battery pack is less than or equal to a preset battery low temperature threshold, the condenser of the adsorption heat pump is controlled to be started to increase the temperature of the battery pack.

[0104] It should be noted that the preset battery low temperature threshold is the temperature of the battery pack when the energy storage battery is working in a low temperature environment. For example, the preset battery low temperature threshold is equal to -20° C. At this time, the composite phase change material is in a solid state and cannot exert its characteristics.

[0105] When the battery thermal management device continuously monitors the temperature of the battery pack through the temperature monitoring device, it compares the temperature of the battery pack with the preset battery low temperature threshold. When the comparison finds that the temperature of the battery pack is less than or equal to the preset battery low temperature threshold, the battery thermal management device determines that the energy storage battery is working in a low temperature environment, and immediately controls the adsorption heat pump to open the condenser through the control terminal, so as to use the large amount of heat released during the condensation process of the condenser to increase the temperature of the battery pack, so that the energy storage battery can work within a suitable temperature range.

[0106] In some embodiments, after the battery thermal management device controls the adsorption heat pump to heat the battery pack based on the temperature of the battery pack, the battery thermal management method provided in the embodiment of the present application may further include the following steps:

[0107] When the temperature of the battery pack is greater than or equal to a preset temperature limit, the condenser is controlled to be turned off, so as to maintain the battery pack operating under a preset suitable temperature condition based on the heat generated by the battery pack.

[0108] It should be noted that the preset temperature limit is the lower limit of the suitable operating temperature range of the energy storage battery. For example, when the suitable operating temperature range of the energy storage battery is (-20°C to 50°C), the preset temperature limit is -20°C.

[0109] After the battery thermal management device controls the adsorption heat pump to open the condenser to increase the temperature of the battery pack by utilizing the large amount of heat released during the condensation process, if the temperature of the battery pack is found to be greater than or equal to the preset temperature limit of -20°C during continuous monitoring of the temperature of the battery pack by the temperature monitoring device, then in this case, the battery thermal management device controls the adsorption heat pump to close the condenser through the control terminal, thereby gradually reducing the heat generated by the condenser, and maintaining the battery pack under preset suitable temperature conditions (i.e., in the temperature range of -20°C to 50°C) based on the heat generated by the battery pack itself during operation of the energy storage battery.

[0110] In this embodiment, the battery thermal management device controls the adsorption heat pump to condense and release heat, thereby providing effective thermal management for the energy storage battery when it is working in a low-temperature environment. This shows great application potential and can meet the needs of thermal management of energy storage batteries.

[0111] In some embodiments, when the battery thermal management device controls the adsorption heat pump to cool the battery pack based on the temperature of the battery pack, the battery thermal management device may perform the following steps:

[0112] When the temperature of the battery pack is greater than or equal to a preset battery high temperature threshold, the evaporator of the adsorption heat pump is controlled to start to reduce the temperature of the battery pack.

[0113] It should be noted that the preset battery high temperature threshold is the temperature of the battery pack when the energy storage battery is working in an extremely high temperature environment. For example, the preset battery low temperature threshold is equal to any one of (45°C to 50°C). At this time, the composite phase change material has reached its energy storage capacity limit because it has absorbed heat and can no longer absorb the heat generated by the battery pack.

[0114] When the battery thermal management device continuously monitors the temperature of the battery pack through the temperature monitoring device, it compares the temperature of the battery pack with the preset battery high temperature threshold. When the comparison finds that the temperature of the battery pack is greater than or equal to the preset battery high temperature threshold, the battery thermal management device determines that the energy storage battery is working in an extremely high temperature environment, and immediately controls the adsorption heat pump to turn on the evaporator through the control terminal to use the evaporator's cooling capacity to cool the energy storage battery, so that the energy storage battery can work within an appropriate temperature range.

[0115] In this embodiment, when the temperature of the battery pack exceeds the limit (45°C to 50°C), the battery thermal management device directly activates the refrigeration function of the adsorption heat pump to continue cooling the battery, which can effectively control the temperature of the battery pack to maintain stability, thereby allowing the energy storage battery to operate within an appropriate temperature range.

[0116] Next, a complete embodiment of the battery thermal management method proposed in the embodiment of the present application is proposed.

[0117] Please refer to Figure 4 , Figure 4 This is a schematic diagram of the operation flow of the battery thermal management method using a composite phase change material and an adsorption heat pump in a complete embodiment of the present application. Figure 4 As shown, when the battery thermal management device is running the battery thermal management method proposed in the embodiment of the present application, during the operation of the battery pack of the energy storage battery, if the battery thermal management device monitors the temperature of the battery pack through the temperature monitoring device and confirms that the energy storage battery is in a high temperature environment (for example, the temperature of the battery pack is greater than or equal to the upper limit of the optimal operating temperature range of 35°C), the battery thermal management device first uses the composite phase change material in the composite phase change material device to absorb and store the heat emitted by the battery pack. This operation can effectively control the temperature of the battery pack to remain within the appropriate operating temperature range (-20°C to 50°C) during the short-term operation of the energy storage battery.

[0118] For scenarios where the energy storage battery works for a long time, the battery thermal management device feeds back the real-time data obtained by monitoring the temperature of the battery pack and the composite phase change material to the control terminal through the temperature monitoring device, so that the control terminal decides whether to turn on the cooling device (evaporator in the adsorption heat pump device) according to the information fed back by the temperature monitoring device in two situations. Situation 1: When the temperature of the battery pack is in the suitable working temperature range (-20℃~50℃), but the composite phase change material in the composite phase change material device cannot effectively store heat, which is manifested as the temperature of the composite phase change material gradually rising. At this time, it is necessary to use the adsorption heat pump device to start continuous cooling of the battery pack, so that the battery thermal management device controls the opening of the valve of the evaporator in the adsorption heat pump device through the control terminal, so as to use the evaporator to evaporate water to absorb the heat of the battery pack, so as to achieve the purpose of cooling the energy storage battery. Situation 2: If the composite phase change material in the composite phase change material device still has absorption capacity, but the temperature of the battery pack has exceeded the suitable working temperature range, at this time, although the temperature of the composite phase change material fluctuates slightly, the temperature of the battery pack will still gradually rise, so it is also necessary to use the refrigeration function of the adsorption heat pump device to maintain the safety of the battery pack. In addition, when the battery thermal management device detects the temperature of the battery pack through the temperature monitoring device, thereby confirming that the energy storage battery is in a low temperature environment (for example, the temperature of the battery pack is less than or equal to -20°C), the battery thermal management device immediately feeds back the real-time temperature information (the temperature of the battery pack) to the control terminal through the temperature monitoring device, thereby controlling the opening of the condenser in the adsorption heat pump device through the control terminal. Due to the large amount of heat energy stored in the solar energy or industrial waste heat absorbed by the condenser when it is not working, a large amount of heat will be released when the condenser is turned on, thereby heating the battery pack, thereby raising the temperature of the battery pack to a suitable operating temperature range, thereby increasing the discharge capacity of the battery pack. Since the battery pack itself will also generate heat when it is working, when the battery thermal management device detects that the temperature of the battery pack exceeds a certain limit (such as -20°C) through the temperature monitoring device, the adsorption heat pump device is controlled by the control terminal to close the condenser, thereby slowly ending the adsorption process. Afterwards, the battery thermal management device still monitors the temperature of the battery pack through the temperature monitoring device at all times to ensure that the battery pack does not experience thermal runaway.

[0119] In this embodiment, the metal organic framework material MIP-200 is very suitable for adsorbing phase change materials and water because of its large pore size, strong water absorption and good chemical and mechanical stability. The heat dissipated by the energy storage battery pack on the market within one hour of operation is about 4300kJ, and when n-octadecane is used as the composite phase change material, its heat storage density is about 200-300kJ / kg. The composite phase change material with sufficient load can effectively absorb the heat generated by the energy storage battery. When the heat exceeds the energy storage limit of the composite phase change material, the evaporator in the adsorption heat pump device can be used to further absorb the excess heat. Compared with the active cooling system, the long-term use of active cooling is not only complex to control, but also requires continuous energy consumption, while the operation of the composite phase change material and the adsorption heat pump is passive and does not require too much control, so it is very suitable for the battery thermal management system. Regarding the application of the adsorption bed device (adsorption heat pump device), experiments show that the water absorption of MIP-200 can reach 0.39g / g, which is significantly higher than the benchmark water absorbent under the same conditions. In addition, the adsorption heat of MIP-200 is as high as 2500-2800kJ / kg. It only needs to load a small amount of adsorbent to release a large amount of heat, thereby increasing the temperature of the battery pack, and then increasing the discharge capacity and service life of the battery pack.

[0120] In addition, the use of composite phase change material devices for thermal energy storage can reduce the use of cooling devices, thereby reducing the overall energy consumption of the energy storage battery system. In high temperature environments, composite phase change material devices can effectively reduce battery temperature and prevent thermal runaway, and are environmentally friendly, safe, reliable and pollution-free, while extending the service life of the battery.

[0121] Furthermore, the adsorption heat pump device based on the metal organic framework can absorb the excess heat emitted by the battery pack in time to cool the battery when the composite phase change material loses its function in a high temperature environment. In addition, the adsorption heat pump device also enhances the working ability of the battery pack in a low temperature environment, increases the discharge capacity of the battery pack, and makes the energy storage battery have a stronger working ability.

[0122] Based on the same inventive concept, the embodiment of the present application also provides a battery thermal management device for implementing the battery thermal management method involved above. The implementation solution provided by the device to solve the problem is similar to the implementation solution recorded in the above method, so the specific limitations in one or more battery thermal management device embodiments provided below can refer to the limitations of the battery thermal management method above, and will not be repeated here.

[0123] Each module in the battery thermal management device provided in the embodiment of the present application can be implemented in whole or in part by software, hardware, or a combination thereof. The above modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0124] In some embodiments, the present application provides a computer device, which may be a server, and its internal structure diagram may be as follows: Figure 5 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store model parameters related to the liquid metal reactor. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, the steps of each embodiment of the battery thermal management method using a composite phase change material and an adsorption heat pump provided in the above-mentioned embodiment of the present application are implemented.

[0125] Those skilled in the art will understand that Figure 5 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0126] In some embodiments, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the steps of each embodiment of the battery thermal management method combining composite phase change materials and adsorption heat pumps provided in the above-mentioned embodiments of the present application are implemented.

[0127] In some embodiments, a computer-readable storage medium is provided on which a computer program is stored. The steps implemented when the computer program is executed by a processor are the same as the steps implemented when the processor in the above-mentioned computer device executes the computer program, and the same content will not be repeated here.

[0128] In one embodiment, a computer program product is provided, including a computer program. The steps implemented when the computer program is executed by a processor are the same as the steps implemented when the processor in the above-mentioned computer device executes the computer program, and the same contents will not be repeated here.

[0129] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0130] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0131] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A battery thermal management method using a composite phase change material and an adsorption heat pump, characterized in that: The method is applied to a battery thermal management device, wherein the battery thermal management device absorbs heat generated by a battery pack of an energy storage battery through a composite phase change material, and the battery thermal management device cools down and heats up the battery pack through an adsorption heat pump; the method comprises: Acquiring the temperature of the battery pack; Controlling the composite phase change material to absorb heat generated by the battery pack based on the temperature of the battery pack; Acquiring the temperature of the composite phase change material; Based on the temperature of the composite phase change material, the adsorption heat pump is controlled to cool the battery pack.

2. The method according to claim 1, characterized in that The step of controlling the composite phase change material to absorb heat generated by the battery pack based on the temperature of the battery pack comprises: determining an operating state of the battery pack based on a temperature of the battery pack; When the working state of the battery pack indicates that the battery pack is working under a preset high temperature condition, the composite phase change material is controlled to absorb heat generated by the battery pack.

3. The method according to claim 1, characterized in that The step of controlling the adsorption heat pump to cool the battery pack based on the temperature of the composite phase change material comprises: When the temperature of the composite phase change material is greater than or equal to a preset phase change material high temperature threshold, the evaporator of the adsorption heat pump is controlled to start to reduce the temperature of the battery pack.

4. The method according to claim 1, characterized in that The method further comprises at least one of the following: Controlling the adsorption heat pump to increase the temperature of the battery pack based on the temperature of the battery pack; Based on the temperature of the battery pack, the adsorption heat pump is controlled to cool the battery pack.

5. The method according to claim 4, characterized in that The step of controlling the adsorption heat pump to increase the temperature of the battery pack based on the temperature of the battery pack includes: When the temperature of the battery pack is less than or equal to a preset battery low temperature threshold, the condenser of the adsorption heat pump is controlled to be started to increase the temperature of the battery pack.

6. The method according to claim 5, characterized in that After the controlling and starting of the condenser of the adsorption heat pump to increase the temperature of the battery pack, the method further includes: When the temperature of the battery pack is greater than or equal to a preset temperature limit, the condenser is controlled to be turned off, so as to maintain the battery pack operating under a preset suitable temperature condition based on the heat generated by the battery pack.

7. The method according to claim 4, characterized in that The controlling the adsorption heat pump to cool the battery pack based on the temperature of the battery pack includes: When the temperature of the battery pack is greater than or equal to a preset battery high temperature threshold, the evaporator of the adsorption heat pump is controlled to start to reduce the temperature of the battery pack.

8. A battery thermal management device using a composite phase change material and an adsorption heat pump, characterized in that: The battery thermal management device comprises: Battery packs for energy storage batteries; A composite phase change material device, the composite phase change material device is used to absorb heat generated by the battery pack through a composite phase change material; An adsorption heat pump device, the adsorption heat pump device is used to cool down and heat up the battery pack; A temperature monitoring device, the temperature monitoring device is used to monitor the temperature of the battery pack and the composite phase change material; A control terminal, wherein the control terminal controls the composite phase change material device to absorb heat generated by the battery pack through the composite phase change material based on the temperature of the battery pack, and controls the adsorption heat pump device to cool down and heat up the battery pack based on the temperature of the battery pack and / or the temperature of the composite phase change material.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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