Thermal management method and apparatus

Abstract

Embodiments of the present application provide a thermal management method and apparatus. A thermal management system comprises a first fan unit and a first heat dissipation apparatus. The thermal management system further comprises a second fan unit and a second heat dissipation apparatus. The first fan unit is used for dissipating heat from the first heat dissipation apparatus, and the second fan unit is used for dissipating heat from the second heat dissipation apparatus. The thermal management method comprises: acquiring a thermal management parameter of the thermal management system; and determining an operation strategy of the first fan unit and the second fan unit on the basis of the thermal management parameter, wherein the operation strategy indicates whether the first fan unit and the second fan unit operate. The embodiments of the present application provide a thermal management method and apparatus. Fan units can be used to effectively dissipate heat from heat dissipation apparatuses of a thermal management system, thereby reducing the continuous operation time of the fan units, improving the performance of the fan units, and prolonging the service life of the fan units.

Description

Thermal management methods and apparatus Cross-reference to related applications

[0001] This application claims priority to Chinese Patent Application No. 202411746332.4, entitled “Thermal Management Method and Apparatus”, filed on November 29, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of energy storage technology, and more specifically, to a thermal management method and apparatus. Background Technology

[0003] With the development of new energy technologies, more and more energy storage systems are being connected to the power grid and renewable energy systems such as wind power and photovoltaics. These energy storage systems receive and store the fluctuating output power generated by renewable energy systems, and then smoothly output it to the power grid, thereby achieving controllability of renewable energy power utilization and reducing the impact on the power grid.

[0004] During the operation of an energy storage system, the temperature of its batteries may rise, which can affect the stable operation of the system. Therefore, when the battery temperature becomes too high, the thermal management system of the energy storage system can be used to cool the battery. The fans in the thermal management system play a crucial role in the battery cooling process. Currently, when the thermal management system is cooling the battery, all fans are running simultaneously. Prolonged operation of the fans leads to reduced performance and lifespan, and also results in high energy consumption for the thermal management system. Summary of the Invention

[0005] This application provides a thermal management method and apparatus that can effectively dissipate heat from the heat dissipation device of the thermal management system using a fan unit, thereby reducing the operating time of the fan unit and improving its performance and service life.

[0006] In a first aspect, a thermal management method is provided, applied to a thermal management system. The thermal management system includes a first fan unit and a first heat dissipation device, and also includes a second fan unit and a second heat dissipation device. The first fan unit is used to dissipate heat from the first heat dissipation device, and the second fan unit is used to dissipate heat from the second heat dissipation device. The thermal management method includes: acquiring thermal management parameters of the thermal management system; and determining operating strategies for the first fan unit and the second fan unit based on the thermal management parameters. The operating strategies indicate whether the first fan unit and the second fan unit are to operate.

[0007] In this embodiment of the application, the operating status of the first fan unit and the second fan unit can be reasonably determined based on the thermal management parameter information of the thermal management system, and the heat dissipation device can be effectively cooled. This enables the thermal management system to effectively cool the thermally managed object, and at the same time, it can reduce the continuous operating time of the first fan unit and / or the second fan unit to a certain extent, thereby improving the performance and service life of the first fan unit and / or the second fan unit.

[0008] In one possible implementation, the thermal management system includes a liquid cooling system, and a first heat dissipation device and a second heat dissipation device belong to the liquid cooling system; the thermal management parameters include the temperature T of the liquid cooling system, and the operating strategies of the first fan unit and the second fan unit in the thermal management system are determined based on the thermal management parameters, including: when the temperature T of the liquid cooling system satisfies: T < T3, the operating strategies of the first fan unit and the second fan unit are determined based on the temperature T of the liquid cooling system.

[0009] In this embodiment, when the temperature of the liquid cooling system T < T3, the operation of the first fan unit and the second fan unit can be reasonably controlled according to the temperature of the liquid cooling system to effectively dissipate heat from the heat dissipation device in the liquid cooling system. This allows the liquid cooling system to effectively cool the heat-managed object when its temperature is relatively low, and at the same time, it can reduce the operating time of the first fan unit and / or the second fan unit to a certain extent, thereby improving the performance and service life of the first fan unit and / or the second fan unit.

[0010] In one possible implementation, the operating strategies for the first and second fan units are determined based on the temperature T of the liquid cooling system, including: when the temperature T of the liquid cooling system satisfies T < T1, the operating strategy instructs the first and second fan units to stop operating; or, when the temperature T of the liquid cooling system satisfies T1 ≤ T < T2, the operating strategy instructs one of the first and second fan units to start operating; or, when the temperature T of the liquid cooling system satisfies T2 ≤ T < T3, the operating strategy instructs the first and second fan units to start operating.

[0011] In this embodiment of the application, when the temperature of the liquid cooling system is T < T3, the operation of the first fan unit and the second fan unit can be reasonably indicated according to the different temperature ranges of the thermal management object. The first fan unit and the second fan unit are not always in operation, which can reduce the operating time of the first fan unit and / or the second fan unit to a certain extent, and improve the performance and service life of the first fan unit and / or the second fan unit.

[0012] In one possible implementation, when the temperature T of the liquid cooling system satisfies: T1≤T<T2, the operation strategy instructs one of the first and second fan units to start operation, including: when the temperature T of the liquid cooling system satisfies: T1≤T<T2, after the operation strategy instructs one of the first and second fan units to start operation for a first period of time, one of the first and second fan units stops operation, and the other fan unit in the first and second fan units starts operation.

[0013] In this embodiment, when the temperature T of the liquid cooling system satisfies T1 ≤ T < T2, the first and second fan units can operate alternately, effectively dissipating heat from the heat dissipation devices in the liquid cooling system, thereby achieving effective cooling of thermally managed objects such as batteries. Simultaneously, the first and second fan units are used as evenly as possible, ensuring their performance and lifespan are as consistent as possible, reducing the differences in performance and lifespan between the two fan units, and thus improving the overall performance and lifespan of the thermal management system. Furthermore, the first and second fan units are not always continuously operating, which can further reduce their usage time and improve their performance and lifespan.

[0014] In one possible implementation, when the temperature T of the liquid cooling system satisfies T1≤T<T2, the operating frequencies of the first and second fan units are positively correlated with the temperature T of the liquid cooling system.

[0015] In one possible implementation, when the temperature T of the liquid cooling system satisfies: T2≤T<T3, the operation strategy instructs the first fan unit and the second fan unit to start operation, including: when the temperature T of the liquid cooling system satisfies: T2≤T<T3, the operation strategy instructs the first fan unit to start operation and operate continuously at a constant frequency, and instructs the second fan unit to start operation, and adjusts the operating frequency of the second fan unit based on the temperature of the liquid cooling system, wherein the operating frequency of the second fan unit is positively correlated with the temperature of the liquid cooling system.

[0016] In this embodiment, when the temperature T of the liquid cooling system satisfies T2 ≤ T < T3, the first fan unit starts and operates continuously at a constant frequency, while the second fan unit starts and operates, with its operating frequency adjusted based on the temperature of the liquid cooling system. This effectively dissipates heat from the liquid cooling system's heat dissipation device and simplifies the control and adjustment of the first fan unit's operating frequency, making operation easier. Furthermore, it reduces the likelihood of both the first and second fan units operating simultaneously at high power for extended periods, thus lowering energy consumption.

[0017] In one possible implementation, when the temperature T of the liquid cooling system satisfies: T2≤T<T3, the operation strategy instructs the first fan unit to operate continuously at a constant frequency, including: when the temperature T of the liquid cooling system satisfies: T2≤T<T3, the operation strategy instructs the fans of the first fan unit to operate continuously at their respective maximum allowed operating frequencies.

[0018] In this embodiment of the application, when the temperature T of the liquid cooling system satisfies T2≤T<T3, the first fan unit can continuously operate at its maximum allowable operating frequency, which simplifies the control and adjustment of the operating frequency of the first fan unit and facilitates operation.

[0019] In one possible implementation, when the temperature T of the liquid cooling system satisfies: T2≤T<T3, the operation strategy instructs the first fan unit and the second fan unit to start operation, including: when the temperature T of the liquid cooling system satisfies: T2≤T<T3, the operation strategy instructs the first fan unit and the second fan unit to start operation, and adjusts the operating frequency of the first fan unit and the second fan unit based on the temperature of the liquid cooling system, wherein the operating frequency of the first fan unit and the second fan unit is positively correlated with the temperature of the liquid cooling system.

[0020] In this embodiment, when the temperature T of the liquid cooling system satisfies T2 ≤ T < T3, the fans of the first and second fan units are controlled to start and operate, and their operating frequencies are adjusted based on the temperature of the liquid cooling system. This allows for reasonable and effective heat dissipation from the liquid cooling system's heat dissipation devices, enabling efficient and effective cooling of the thermally managed object. It also reduces the likelihood of both the first and second fan units operating at high power for extended periods simultaneously, thus lowering energy consumption. Furthermore, the more balanced use of the fans in both fan units improves the consistency of their performance and lifespan, thereby enhancing the overall performance and lifespan of the thermal management system. Simultaneously, it reduces the likelihood of the first fan unit operating at high power for extended periods, further lowering its energy consumption.

[0021] In one possible implementation, when the temperature T of the liquid cooling system satisfies: T2≤T<T3, the operation strategy instructs the first and second fan units to start operation, including: when the temperature T of the liquid cooling system satisfies: T2≤T<T3, the operation strategy instructs the first and second fan units to start operation at the same operating frequency.

[0022] In this embodiment of the application, when the temperature T of the liquid cooling system satisfies T2≤T<T3, the start-up and operation frequencies of the first fan unit and the second fan unit are unified, which can simplify the control of the start-up and operation of the first fan unit and the second fan unit and facilitate operation.

[0023] In one possible implementation, the thermal management method further includes: when the temperature T of the liquid cooling system satisfies T≥T3, stopping the cooling of the thermally managed object using the first heat dissipation device and the second heat dissipation device.

[0024] In this embodiment of the application, when the temperature of the liquid cooling system T≥T3, the liquid cooling system cannot meet the cooling requirements of the thermally managed object, and the cooling of the thermally managed object by the first heat dissipation device and the second heat dissipation device can be stopped, thereby enabling reasonable control of the cooling of the thermally managed object by the thermal management system.

[0025] In one possible implementation, the thermal management system further includes a refrigerant system, and the thermal management method further includes: when the temperature T of the liquid cooling system satisfies T≥T3, the refrigerant system is started to cool the thermally managed object.

[0026] In this embodiment, when the temperature of the liquid cooling system is T≥T3, the liquid cooling system cannot meet the cooling requirements of the thermally managed object. A refrigerant system with higher cooling capacity can be used to cool the thermally managed object, thereby meeting the cooling requirements of the thermally managed object as much as possible and improving the performance and service life of the thermally managed object.

[0027] In one possible implementation, the thermal management system further includes a refrigerant system, which includes a third heat dissipation device and a fourth heat dissipation device. The first fan unit is also used to dissipate heat for the third heat dissipation device, and the second fan unit is also used to dissipate heat for the fourth heat dissipation device. The thermal management method further includes: obtaining the pressure P of the refrigerant system when the temperature T of the liquid cooling system satisfies T≥T3; and determining the operating strategies of the first fan unit and the second fan unit based on the pressure P of the refrigerant system.

[0028] In this embodiment, when the temperature T of the liquid cooling system is greater than or equal to T3, the pressure P of the refrigerant system can also be obtained. Based on this pressure information, the operation of the first fan unit and the second fan unit can be reasonably indicated. This allows for effective heat dissipation of the third and fourth heat dissipation devices in the refrigerant system by the first and second fan units, thereby enabling the refrigerant system to effectively cool the thermally managed object. Simultaneously, it can reduce the operating time of the first and / or second fan units to a certain extent, improving their performance and service life.

[0029] In one possible implementation, the operating strategies for the first and second fan units are determined based on the refrigerant system pressure P, including: when the refrigerant system pressure P satisfies P < P1, the operating strategy instructs the first and second fan units to stop operating; or, when the refrigerant system pressure P satisfies P1 ≤ P < P2, the operating strategy instructs one of the first and second fan units to start operating; or, when the refrigerant system pressure P satisfies P2 ≤ P < P3, the operating strategy instructs the first and second fan units to start operating; or, when the refrigerant system pressure P satisfies P ≥ P3, the operating strategy instructs the first and second fan units to stop operating.

[0030] In this embodiment, when the temperature of the liquid cooling system is T≥T3, the operation of the first fan unit and the second fan unit can be reasonably controlled according to the pressure of the refrigerant system to effectively dissipate heat from the heat dissipation device in the refrigerant system. This allows the refrigerant system to effectively cool the thermally managed object when its temperature is relatively high, and at the same time, it can reduce the operating time of the first fan unit and / or the second fan unit to a certain extent, thereby improving the performance and service life of the first fan unit and / or the second fan unit.

[0031] In one possible implementation, when the refrigerant system pressure P satisfies: P1≤P<P2, the operation strategy instructs one of the first and second fan units to start operation, including: when the refrigerant system pressure P satisfies: P1≤P<P2, after the operation strategy instructs one of the first and second fan units to start operation for a second period of time, one of the first and second fan units stops operation, and the other fan unit in the first and second fan units starts operation.

[0032] In this embodiment, when the refrigerant system pressure P satisfies P1≤P<P2, the first and second fan units can operate alternately, effectively dissipating heat from the heat dissipation devices in the refrigerant system, thereby achieving effective cooling of thermally managed objects such as batteries. Simultaneously, the first and second fan units are used as evenly as possible, ensuring their performance and lifespan are as consistent as possible, reducing the differences in performance and lifespan between the two units, and thus improving the overall performance and lifespan of the thermal management system. Furthermore, the first and second fan units are not always continuously operating, which can further reduce their usage time and improve their performance and lifespan.

[0033] In one possible implementation, when the refrigerant system pressure P satisfies: P1≤P<P2, the operating frequency of the first and second fan units is positively correlated with the refrigerant system pressure.

[0034] In this embodiment, when the refrigerant system pressure P satisfies P1≤P<P2, the operating frequencies of the first and second fan units can be adjusted based on the refrigerant system temperature. This allows for reasonable and effective heat dissipation of the heat dissipation devices in the refrigerant system, thereby achieving effective cooling of the thermally managed object; simultaneously, it reduces the likelihood of the first and second fan units operating at high power for extended periods, thus lowering energy consumption.

[0035] In one possible implementation, when the refrigerant system pressure P satisfies: P2≤P<P3, the operation strategy instructs the first fan unit and the second fan unit to start operation, including: when the refrigerant system pressure P satisfies: P2≤P<P3, the operation strategy instructs the first fan unit to start operation and operate continuously at a constant frequency, and instructs the second fan unit to start operation and adjusts the operating frequency of the second fan unit based on the refrigerant pressure.

[0036] In this embodiment, when the refrigerant system pressure P satisfies P2 ≤ P < P3, the first fan unit starts and operates continuously at a constant frequency, while the second fan unit starts and its operating frequency is adjusted based on the refrigerant system pressure. This effectively dissipates heat from the refrigerant system's cooling device and simplifies the control and adjustment of the first fan unit's operating frequency, making operation easier. Furthermore, it reduces the likelihood of both the first and second fan units operating at high power for extended periods simultaneously, thus lowering energy consumption.

[0037] In one possible implementation, when the refrigerant system pressure P satisfies: P2≤P<P3, the operation strategy instructs the fan of the first fan unit to operate continuously at a constant frequency, including: when the refrigerant system pressure P satisfies: P2≤P<P3, the operation strategy instructs the fan of the first fan unit to operate continuously at their respective maximum permissible operating frequencies.

[0038] In this embodiment, when the pressure P of the refrigerant system satisfies P2≤P<P3, the first fan unit can continuously operate at its maximum permissible operating frequency, which simplifies the control and adjustment of the operating frequency of the first fan unit and facilitates operation.

[0039] In one possible implementation, when the refrigerant system pressure P satisfies: P2≤P<P3, the operation strategy instructs the first and second fan units to start operation, including: when the refrigerant system pressure P satisfies: P2≤P<P3, the operation strategy instructs the first and second fan units to start operation, and adjusts the operating frequency of the first and second fan units based on the refrigerant system pressure, wherein the operating frequency of the first and second fan units is positively correlated with the refrigerant system pressure.

[0040] In this embodiment, when the refrigerant system pressure P satisfies P2≤P<P3, the fans of the first and second fan units are controlled to start and operate, and their operating frequencies are adjusted based on the refrigerant system pressure. This allows for reasonable and effective heat dissipation from the refrigerant system's heat dissipation devices, enabling efficient and effective cooling of the thermally managed object. It also reduces the likelihood of both fan units operating at high power for extended periods simultaneously, thus lowering energy consumption. Furthermore, the more balanced use of the fans in both fan units improves the consistency of their performance and lifespan, thereby enhancing the overall performance and lifespan of the thermal management system. Simultaneously, it reduces the likelihood of the first fan unit operating at high power for extended periods, further lowering its energy consumption.

[0041] In one possible implementation, when the refrigerant system pressure P satisfies: P2≤P<P3, the operation strategy instructs the first and second fan units to start operation, including: when the refrigerant system pressure P satisfies: P2≤P<P3, the operation strategy instructs the fans of the first and second fan units to start operation at the same operating frequency.

[0042] In this embodiment of the application, when the pressure P of the refrigerant system satisfies: P2≤P<P3, the start-up and operation frequencies of the first fan unit and the second fan unit are unified, which can simplify the control of the start-up and operation of the first fan unit and the second fan unit and facilitate operation.

[0043] Secondly, a thermal management device is provided, applied to a thermal management system. The thermal management system includes a first fan unit and a first heat dissipation device, and also includes a second fan unit and a second heat dissipation device. The first fan unit is used to dissipate heat from the first heat dissipation device, and the second fan unit is used to dissipate heat from the second heat dissipation device. The thermal management device includes: an acquisition unit for acquiring thermal management parameters of the thermal management system; and a processing unit for determining operating strategies for the first fan unit and the second fan unit based on the thermal management parameters. The operating strategies indicate whether the first fan unit and the second fan unit should operate.

[0044] In one possible implementation, the thermal management system includes a liquid cooling system, and the first heat dissipation device and the second heat dissipation device belong to the liquid cooling system; the thermal management parameters include the temperature T of the liquid cooling system, and according to the thermal management parameters, the processing unit is used to determine the operating strategy of the first fan unit and the second fan unit based on the temperature T of the liquid cooling system when the temperature T of the liquid cooling system satisfies: T < T3.

[0045] In one possible implementation, the processing unit is configured to instruct the first and second fan units to stop operating when the temperature T of the liquid cooling system satisfies: T < T1; or, instruct one of the first and second fan units to start operating when the temperature T of the liquid cooling system satisfies: T1 ≤ T < T2; or, instruct the first and second fan units to start operating when the temperature T of the liquid cooling system satisfies: T2 ≤ T < T3.

[0046] In one possible implementation, the processing unit is configured to, when the temperature T of the liquid cooling system satisfies: T1≤T<T2, instruct one of the first and second fan units to start operation for a first period of time, then stop operation of one of the first and second fan units, and start operation of the other fan unit.

[0047] In one possible implementation, when the temperature T of the liquid cooling system satisfies T1≤T<T2, the operating frequencies of the first and second fan units are positively correlated with the temperature T of the liquid cooling system.

[0048] In one possible implementation, the processing unit is configured to, when the temperature T of the liquid cooling system satisfies: T2≤T<T3, instruct the first fan unit to start operation and operate continuously at a constant frequency, and instruct the second fan unit to start operation, and adjust the operating frequency of the second fan unit based on the temperature of the liquid cooling system, wherein the operating frequency of the second fan unit is positively correlated with the temperature of the liquid cooling system.

[0049] In one possible implementation, the processing unit is used to instruct the fans of the first fan unit to continue operating at their respective maximum permissible operating frequencies when the temperature T of the liquid cooling system satisfies: T2≤T<T3.

[0050] In one possible implementation, the processing unit is configured to instruct the first and second fan units to start operation when the temperature T of the liquid cooling system satisfies: T2≤T<T3, and adjust the operating frequency of the first and second fan units based on the temperature of the liquid cooling system, wherein the operating frequency of the first and second fan units is positively correlated with the temperature of the liquid cooling system.

[0051] In one possible implementation, the processing unit is used to instruct the first fan unit and the second fan unit to start operation at the same operating frequency when the temperature T of the liquid cooling system satisfies: T2≤T<T3.

[0052] In one possible implementation, the processing unit is configured to stop cooling the thermally managed object using the first and second heat dissipation devices when the temperature T of the liquid cooling system satisfies: T≥T3.

[0053] In one possible implementation, the thermal management system further includes a refrigerant system and a processing unit, for starting the refrigerant system to cool the thermally managed object when the temperature T of the liquid cooling system satisfies: T≥T3.

[0054] In one possible implementation, the thermal management system further includes a refrigerant system, which includes a third heat dissipation device and a fourth heat dissipation device. A first fan unit is also used to dissipate heat for the third heat dissipation device, and a second fan unit is also used to dissipate heat for the fourth heat dissipation device. An acquisition unit is used to acquire the pressure P of the refrigerant system when the temperature T of the liquid cooling system satisfies T≥T3. A processing unit is used to determine the operating strategies of the first fan unit and the second fan unit based on the pressure P of the refrigerant system.

[0055] In one possible implementation, the processing unit is configured to: instruct the first fan unit and the second fan unit to stop operating when the refrigerant system pressure P satisfies: P < P1; or instruct one of the first fan unit and the second fan unit to start operating when the refrigerant system pressure P satisfies: P1 ≤ P < P2; or instruct the first fan unit and the second fan unit to start operating when the refrigerant system pressure P satisfies: P2 ≤ P < P3; or instruct the first fan unit and the second fan unit to stop operating when the refrigerant system pressure P satisfies: P ≥ P3.

[0056] In one possible implementation, the processing unit is configured to, when the pressure P of the refrigerant system satisfies: P1≤P<P2, instruct one of the first and second fan units to start operation for a second period of time, then stop operation of one of the first and second fan units, and start operation of the other fan unit.

[0057] In one possible implementation, when the refrigerant system pressure P satisfies: P1≤P<P2, the operating frequency of the first and second fan units is positively correlated with the refrigerant system pressure.

[0058] In one possible implementation, the processing unit is configured to instruct the first fan unit to start operation and operate continuously at a constant frequency when the pressure P of the refrigerant system satisfies: P2≤P<P3, and to instruct the second fan unit to start operation and adjust the operating frequency of the second fan unit based on the refrigerant pressure.

[0059] In one possible implementation, the processing unit is used to instruct the fans of the first fan unit to operate continuously at their respective maximum permissible operating frequencies when the pressure P of the refrigerant system satisfies: P2≤P<P3.

[0060] In one possible implementation, the processing unit is configured to instruct the first and second fan units to start operation when the refrigerant system pressure P satisfies: P2≤P<P3, and adjust the operating frequency of the first and second fan units based on the refrigerant system pressure, wherein the operating frequency of the first and second fan units is positively correlated with the refrigerant system pressure.

[0061] In one possible implementation, the processing unit is used to instruct the fans of the first fan unit and the second fan unit to start operating at the same operating frequency when the pressure P of the refrigerant system satisfies: P2≤P<P3.

[0062] Thirdly, a thermal management device is provided, comprising a memory and a processor, the memory for storing instructions, and the processor for reading the instructions and executing a thermal management method as described in the first aspect and any possible implementation thereof.

[0063] Fourthly, a thermal management system is provided, which includes thermal management devices as described in any of the possible implementations of the second or third aspects above.

[0064] Fifthly, an energy storage system is provided, in which the electrical device includes a battery, a thermal management system, and a thermal management device as in any possible implementation of the second or third aspect.

[0065] In a sixth aspect, a chip is provided, comprising: a processor for retrieving and running a computer program from a memory, causing a device on which the chip is mounted to perform a thermal management method as described in the first aspect and any possible implementation thereof.

[0066] In a seventh aspect, a computer program is provided that, when executed by a computer, causes the computer to implement the thermal management method as described in the first aspect and any possible implementation thereof.

[0067] Eighthly, a computer-readable storage medium is provided for storing a computer program that, when executed by a computer, causes the computer to implement the thermal management method as described in the first aspect and any possible implementation thereof.

[0068] Ninthly, a computer program product is provided, including computer program instructions that, when executed by a computer, cause the computer to implement the thermal management method as described in the first aspect and any possible implementation thereof. Attached Figure Description

[0069] Figure 1 is a schematic diagram of the energy storage system applicable to the embodiments of this application.

[0070] Figure 2 is a schematic diagram of the thermal management system applicable to the embodiments of this application.

[0071] Figure 3 is a flowchart illustrating the thermal management method provided in an embodiment of this application.

[0072] Figure 4 is a flowchart illustrating the thermal management method provided in an embodiment of this application.

[0073] Figure 5 is a flowchart illustrating the thermal management method provided in an embodiment of this application.

[0074] Figure 6 is a schematic block diagram of the thermal management device provided in an embodiment of this application.

[0075] Figure 7 is another schematic block diagram of the thermal management device provided in the embodiments of this application. Detailed Implementation

[0076] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0077] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0078] The term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " in this text generally indicates that the preceding and following related objects have an "or" relationship.

[0079] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0080] With the development of new energy technologies, more and more energy storage systems are being connected to the power grid and renewable energy systems such as wind power and photovoltaics. These energy storage systems receive and store the fluctuating output power generated by renewable energy systems, and then smoothly output it to the power grid, thereby achieving controllability of renewable energy power utilization and reducing the impact on the power grid.

[0081] During the use of an energy storage system, the temperature of its batteries may rise. When the battery temperature is too high, it will affect the stable operation of the energy storage system. Therefore, when the battery temperature is too high, the thermal management system of the energy storage system can be used to cool the battery. The fan of the thermal management system plays a very important role in the battery cooling process.

[0082] Currently, when the thermal management system is cooling the battery, all fans are running simultaneously. This prolonged fan operation leads to reduced fan performance and lifespan, and also results in high energy consumption for the thermal management system.

[0083] To address the aforementioned problems, this application proposes a thermal management method and apparatus applied to a thermal management system. The thermal management system includes a first fan unit and a first heat dissipation device, and further includes a second fan unit and a second heat dissipation device. The first fan unit is used to dissipate heat from the first heat dissipation device, and the second fan unit is used to dissipate heat from the second heat dissipation device. The thermal management method includes: acquiring thermal management parameters of the thermal management system; and determining an operating strategy for the first fan unit and the second fan unit based on the thermal management parameters, wherein the operating strategy indicates whether the first fan unit and the second fan unit are operating.

[0084] In the embodiments of this application, the fan unit can be used to effectively dissipate heat from the heat dissipation device of the thermal management system, thereby effectively cooling the thermally managed object, reducing the continuous operating time of the fan unit, and improving the performance and service life of the fan unit.

[0085] Figure 1 is a schematic diagram of the energy storage system to which this application applies.

[0086] The energy storage system 10 may include a battery 100, a thermal management system 200, and a converter module 300, etc.

[0087] In some embodiments, the energy storage system 10 may include one or more batteries 100.

[0088] Battery 100 generally comprises one or more battery cells. Multiple battery cells can be connected in series, parallel, or a combination thereof. A combination thereof refers to a connection method that mixes series and parallel connections. For example, multiple battery cells can first be connected in series, parallel, or a combination thereof to form a battery module, and then multiple battery modules can be connected in series, parallel, or a combination thereof to form a battery. In other words, multiple battery cells can directly form battery 100, or they can first be formed into battery modules, and then the battery modules can be combined to form battery 100.

[0089] Multiple batteries 100 are connected in series, parallel, or mixed configurations to form a battery cluster. In some embodiments, the energy storage system 10 may include one or more battery clusters. For example, the battery cluster of the energy storage system 10 may be formed by multiple batteries 100 connected in series. Another example is that the battery cluster of the energy storage system 10 may be formed by multiple batteries 100 connected in parallel and then in series.

[0090] The batteries in this application embodiment may include, but are not limited to, lithium-ion batteries, lithium metal batteries, lead-acid batteries, nickel-metal hydride batteries, lithium-sulfur batteries, lithium-air batteries, or sodium-ion batteries.

[0091] When the temperature of the battery 100 is too high, the thermal management system 200 can use cooling technology to cool the battery 100; when the temperature of the battery 100 is too low, the thermal management system 200 can use heating technology to heat the battery 100 to meet the temperature regulation needs of the energy storage system.

[0092] In some embodiments, the converter module 300 may include a direct current / direct current (DC / DC) converter and / or an alternating current / direct current (DC / AC) bidirectional converter. For example, a DC / DC converter can be used to enable energy transfer between the energy storage system 10 and a renewable energy system such as a photovoltaic system. As another example, a DC / AC bidirectional converter, such as a power conversion system (PCS), can be used to enable energy transfer between the energy storage system 10 and the power grid.

[0093] In some embodiments, when the temperature of the converter module 300 is too high, the thermal management system 200 can be used to cool the converter module 300.

[0094] It should be understood that the components shown in Figure 1 are just examples. In actual applications, the components may have different names, or the components in the energy storage system shown in Figure 1 may be added or deleted according to actual needs.

[0095] Figure 2 is a schematic diagram of the thermal management system applicable to the embodiments of this application.

[0096] The thermal management system 200 includes a liquid cooling system 210 and a refrigerant system 220.

[0097] The liquid cooling system 210 uses a coolant, such as water, as the heat management medium. In some embodiments, an antifreeze may also be added to the coolant to prevent it from freezing in colder environments.

[0098] In some embodiments, the liquid cooling system 210 may include a first heat dissipation device group 211, a liquid temperature sensor 212, a pump 213, a multi-way valve 214, a first solenoid valve group 215, a fan group 216, a coolant flow channel 217, etc.

[0099] In some embodiments, the heat dissipation device of the first heat dissipation device group 211 may include a condenser, which acts as a heat exchange device to convert gas or vapor into liquid (gas-liquid conversion) and rapidly transfer the heat dissipated during the gas-liquid conversion to its external environment, such as the nearby air medium. For example, the coolant flowing through the battery 100 vaporizes and flows to the first heat dissipation device group 211, where it undergoes gas-liquid conversion and transfers the heat from the gas-liquid conversion to the external environment. The converted coolant then continues to flow to the battery 100 to cool the battery 100.

[0100] For example, the heat dissipation device of the first heat dissipation device group 211 may include an air-cooled condenser, a water-cooled condenser, or a spray condenser, etc.

[0101] In some embodiments, the heat dissipation device of the first heat dissipation device group 211 may include a heat dissipation water tank.

[0102] For example, the first heat dissipation device group 211 may include a first heat dissipation device 2111 and a second heat dissipation device 2112. As shown in FIG2, the first heat dissipation device 2111 and the second heat dissipation device 2112 may be connected in parallel on the main line of the coolant flow channel 217. Optionally, the first heat dissipation device 2111 and the second heat dissipation device 2112 may also be connected in series on the main line of the coolant flow channel 217.

[0103] The liquid temperature sensor 212 can be disposed on the flow channel of the coolant inlet and / or outlet of the battery 100. For example, a first temperature sensor 2121 and / or a second temperature sensor 2122 can be disposed on the coolant flow channel 217 disposed near the coolant inlet and / or outlet of the battery 100 to determine the temperature of the battery 100.

[0104] Pump 213 is used to transfer mechanical energy or other external energy to the coolant, increasing the energy of the coolant and thereby accelerating the flow rate and pressure of the coolant. In some embodiments, the liquid cooling system 210 may include at least one pump, for example, the liquid cooling system 210 may include a first pump 2131 and a second pump 2132.

[0105] By rotating the valve core of the multi-way valve 214, the different ports of the multi-way valve are connected, thereby connecting the different flow channels and allowing the coolant to switch between different flow channels.

[0106] The first solenoid valve group 215 can control the flow of coolant in the coolant channel 217.

[0107] For example, as shown in FIG2, the first solenoid valve group may include a first solenoid valve 2151 and a second solenoid valve 2152. The first solenoid valve 2151 and the first heat dissipation device 2111 located in the first coolant branch 2171 are connected in parallel with the second solenoid valve 2152 and the second heat dissipation device 2112 located in the second coolant branch 2172. The first solenoid valve 2151 can be used to control whether the coolant flows in the first coolant branch 2171, and the second solenoid valve 2152 can be used to control whether the coolant flows in the second coolant branch 2172. For example, when the first solenoid valve 2151 is closed and the second solenoid valve 2152 is open, the coolant can circulate between the main coolant path and the first coolant branch 2171, but cannot circulate between the main coolant path and the second coolant branch 2172. In this way, the coolant can be cooled only through the second heat dissipation device 2112.

[0108] The fan unit 216 is located near the first heat dissipation device group 211, such as facing the first heat dissipation device group 211. By rotating the fan unit 216, the heat of the first heat dissipation device group 211 can be transferred to the external environment more quickly, thereby improving the cooling speed of the battery 100.

[0109] For example, the fan unit 216 may include a first fan unit 2161 and a second fan unit 2162. The first fan unit 2161 and the second fan unit 2162 may be respectively arranged near the first heat dissipation device 2111 and the second heat dissipation device 2112, respectively, to accelerate the transfer of heat generated by the liquid conversion of the first heat dissipation device 2111 and the second heat dissipation device 2112 to the external environment.

[0110] In some embodiments, the coolant after being cooled by the first heat dissipation device group 211 can flow through the battery 100 to cool the battery 100 when the battery 100 temperature is too high.

[0111] In some embodiments, the coolant after being cooled by the first heat dissipation device group 211 can flow through the converter module 300 to cool the converter module 300.

[0112] For example, the coolant after being cooled by the first heat dissipation device group 211 can first flow through the inverter module 300 and then flow to the battery 100, thereby cooling the battery 100 and the inverter module 300 simultaneously.

[0113] For example, under the action of the first pump 2131, the high-temperature coolant flowing out of the battery 100 can flow into the first heat dissipation device 2111 and the second heat dissipation device 2112, and then flow to the converter module 300 through the first solenoid valve 2151 and the second solenoid valve 2152 respectively. Since the cooling demand of the converter module 300 is not very high, the coolant flowing out of the converter module 300 is still low-temperature coolant, which can continue to flow to the battery 100 to cool the battery 100 and complete the cooling cycle.

[0114] In some embodiments, the liquid cooling system 210 may further include a PTC heater. For example, the PTC heater may be disposed on the coolant flow channel 217 between the first pump 2131 and the battery 100.

[0115] The refrigerant system 220 uses refrigerants such as ammonia, water, or brine as the heat management medium. Heat transfer is achieved through evaporation and condensation of the refrigerant.

[0116] In some embodiments, the refrigerant system 220 may include a second heat dissipation device group 221, a compressor 222, a pressure sensor 223, an expansion valve 224, a second solenoid valve group 225, a liquid receiver 226, an evaporator 228, a refrigerant flow channel 229, etc.

[0117] Compressor 222 is a driven fluid machine that raises low-pressure gas to high-pressure gas. The compressor 222 draws in low-pressure gaseous refrigerant through its suction port, and the piston, driven by a motor, compresses the low-pressure gaseous refrigerant before discharging high-pressure gaseous refrigerant through its discharge port, thus providing power for the phase change cycle of the refrigerant.

[0118] The heat dissipation device of the second heat dissipation device group 221 may include a condenser. A condenser is a device that can convert gas or vapor into liquid (gas-liquid conversion). High-pressure gaseous refrigerant is converted into high-pressure liquid refrigerant through the second heat dissipation device group 221, such as the condenser group, and the heat dissipated during the gas-liquid conversion process is quickly transferred to the external environment, such as air. For example, the heat dissipation device of the second heat dissipation device group 221 may include an air-cooled condenser, a water-cooled condenser, or a spray condenser, etc.

[0119] In some embodiments, the second heat dissipation device group may include a third heat dissipation device 2211 and a fourth heat dissipation device 2212. As shown in FIG2, the third heat dissipation device 2211 and the fourth heat dissipation device 2212 may be connected in parallel to the main line of the refrigerant flow channel 229. Optionally, the third heat dissipation device 2211 and the fourth heat dissipation device 2212 may also be connected in series to the main line of the refrigerant flow channel 229.

[0120] The second solenoid valve assembly 225 can control the flow of refrigerant in the refrigerant channel 229.

[0121] In some embodiments, the second solenoid valve group 225 may include a third solenoid valve 2251 and a fourth solenoid valve 2252, respectively used to control the flow of coolant through the third heat dissipation device 2211 and the fourth heat dissipation device 2212. The third solenoid valve 2251 and the fourth solenoid valve 2252 are respectively disposed on branches of the refrigerant flow channel 229 where the third heat dissipation device 2211 and the fourth heat dissipation device 2212 are located. The first refrigerant branch 2291 where the third solenoid valve 2251 and the third heat dissipation device 2211 are located is connected in parallel with the second refrigerant branch 2292 where the fourth solenoid valve 2252 and the fourth heat dissipation device 2212 are located. For example, when the third solenoid valve 2251 is closed and the fourth solenoid valve 2252 is open, the coolant can circulate between the main path of the refrigerant flow channel and the first refrigerant branch 2291, but cannot circulate between the main path of the refrigerant flow channel and the second refrigerant branch 2292. In this way, the refrigerant can be converted from gas to liquid only through the third heat dissipation device 2211.

[0122] The receiver 226 can store and replenish refrigerant to the refrigerant system 220.

[0123] In some embodiments, the refrigerant system 220 may include a first liquid receiver 2261 and a second liquid receiver 2262, which are respectively disposed on the first refrigerant branch 2291 and the second refrigerant branch 2292.

[0124] Expansion valve 224 is used to release pressure from high-pressure liquid refrigerant. The released refrigerant cools down and is converted into low-pressure liquid refrigerant. Expansion valve 224 can reduce pressure (or release or throttle) the input high-pressure liquid refrigerant to obtain low-pressure liquid refrigerant. Expansion valve 224 can also be called an electronic expansion valve, a thermostatic expansion valve, or a throttle valve.

[0125] In some embodiments, an expansion valve 224 is installed at the inlet of the evaporator 228. The expansion valve 224 can throttle and control the flow of refrigerant.

[0126] Evaporator 228 is a device that can convert liquid substances into gaseous substances. Low-pressure liquid refrigerant passes through evaporator 228, absorbing heat such as heat from the coolant flowing through battery 100, and becomes low-pressure gaseous refrigerant.

[0127] The refrigerant flow channel 229 is used for the flow of refrigerant.

[0128] The gas-liquid separator 2210 is used to prevent refrigerant liquid from slugging into the compressor 222 and to improve the stability of the compressor 222's operation. When the gas-liquid two-phase refrigerant enters the gas-liquid separator 2210, the expansion rate decreases, causing the liquid to separate or hit a baffle, thereby separating the liquid.

[0129] Pressure sensor 223 can be used to monitor the pressure of refrigerant system 220. In some embodiments, the refrigerant system may include a first pressure sensor 2231 and a second pressure sensor 2232, respectively located near the refrigerant inlet and / or refrigerant outlet of compressor 222.

[0130] In some embodiments, the fan unit 216 can also be used to dissipate heat from the second heat dissipation device group 221. For example, the first fan unit 2161 can also be used to dissipate heat from the third heat dissipation device 2211, and the second fan unit 2162 can also be used to dissipate heat from the fourth heat dissipation device 2212, respectively, to accelerate the transfer of heat generated by the gas-liquid conversion of the third heat dissipation device 2211 and the fourth heat dissipation device 2212 to the external environment. The first fan unit 2161 can be simultaneously located near the first heat dissipation device 2111 and the third heat dissipation device 2211, and the second fan unit 2162 can be simultaneously located near the second heat dissipation device 2112 and the fourth heat dissipation device 2212.

[0131] In some embodiments, the refrigerant system 220 can indirectly cool the thermally managed object. For example, the refrigerant system 220 can use refrigerant to cool the coolant flowing through the thermally managed object, such as battery 100 and / or converter module 300. Alternatively, the refrigerant system 220 can directly cool the thermally managed object. For example, the refrigerant in the refrigerant system can flow through the thermally managed object, such as battery 100 and / or converter module 300.

[0132] For example, compressor 222 compresses low-pressure gaseous refrigerant, and the resulting high-pressure gaseous refrigerant is discharged from the exhaust port of compressor 222 and flows into the second heat dissipation unit 221 via the refrigerant inlet. In the second heat dissipation unit 221, the high-pressure gaseous refrigerant undergoes heat exchange to form high-pressure liquid refrigerant (either a gaseous phase or a gas-liquid two-phase system), which is then discharged and flows into expansion valve 224. Within expansion valve 224, the high-pressure liquid refrigerant releases pressure and heat, transforming into low-pressure liquid refrigerant (either a gaseous phase or a gas-liquid two-phase system), which then enters the refrigerant inlet of evaporator 228. In evaporator 228, the low-pressure liquid refrigerant exchanges heat with the high-temperature coolant flowing through thermal management components such as battery 100 and / or converter module 300, forming low-pressure gaseous refrigerant, which then flows into the inlet of compressor 222, completing the refrigerant circulation process.

[0133] In some embodiments, the thermal management system may include a liquid cooling system 210 and a refrigerant system 220. When the temperature of the thermally managed object, such as the battery 100, is below a certain temperature value, the liquid cooling system 210 can be used to cool the battery 100. Alternatively, when the temperature of the thermally managed object, such as the battery 100, is above a certain temperature value, the refrigerant system 220 can be used to directly or indirectly cool the battery 100.

[0134] Alternatively, in some embodiments, the thermal management system 200 may include only the liquid cooling system 210, which can cool the thermally managed object.

[0135] Optionally, in some embodiments, the thermal management system 200 may include only the refrigerant system 220, which may directly or indirectly cool the thermal management components.

[0136] It should be understood that the components shown in Figure 2 are just examples. In actual applications, the components may have different names, or the components in the thermal management system shown in Figure 2 may be added or deleted according to actual needs.

[0137] It should be understood that the embodiments of this application can be applied to energy storage systems or electrical devices including thermal management systems. The electrical devices mentioned in the embodiments of this application can refer to vehicles, such as electric vehicles, electric bicycles, etc. The electrical devices mentioned in the embodiments of this application can also be other battery-powered devices, such as mobile phones, portable devices, laptops, electric toys, power tools, ships, spacecraft, etc. Spacecraft include, for example, airplanes, rockets, space shuttles, and spacecraft.

[0138] Figure 3 is a schematic flowchart of the thermal management method provided in an embodiment of this application. This thermal management method is applied to the thermal management system shown in Figure 2. The thermal management system includes a first fan unit and a first heat dissipation device. The thermal management system also includes a second fan unit and a second heat dissipation device. The first fan unit is used to dissipate heat from the first heat dissipation device, and the second fan unit is used to dissipate heat from the second heat dissipation device.

[0139] 310. Obtain the thermal management parameters of the thermal management system.

[0140] For example, thermal management parameters may include at least one of the following: current, voltage, temperature, or power of the thermally managed object, such as the battery. For instance, the temperature of the liquid cooling system may be determined based on the temperature near the coolant inlet and / or outlet of the battery 100 in Figure 2.

[0141] For example, thermal management parameters may include the temperature of the coolant in the liquid cooling system of the thermal management system near the thermally managed object and / or the pressure of the refrigerant system in the thermal management system, etc.

[0142] 320. Based on the thermal management parameters, determine the operating strategies for the first and second fan units.

[0143] The operation strategy indicates whether the first and second wind turbine units are operating.

[0144] That is, in the embodiments of this application, the operation of the first fan unit and the operation of the second fan unit can be indicated based on the thermal management parameters of the thermal management system.

[0145] The first heat dissipation device can transfer the heat generated from cooling the thermally managed object to the external environment, such as air. As an example, the first heat dissipation device may include a condenser or a water tank. For instance, the first heat dissipation device may include at least one condenser.

[0146] The second heat dissipation device can transfer the heat generated from cooling the thermally managed object to the external environment, such as air. As an example, the second heat dissipation device may include a condenser or a water tank. For instance, the second heat dissipation device may include at least one condenser.

[0147] The first fan unit can be used to dissipate heat from the first heat dissipation device, thereby improving the speed and efficiency of heat transfer from the first heat dissipation device to the external environment. As an example, the first fan unit may include at least one fan.

[0148] The second fan unit can be used to dissipate heat from the second heat dissipation device, thereby improving the speed and efficiency of heat transfer from the second heat dissipation device to the external environment. As an example, the second fan unit may include at least one fan.

[0149] In this embodiment of the application, the operating status of the first fan unit and the second fan unit can be reasonably indicated according to the thermal management parameter information of the thermal management system, and the heat dissipation device can be effectively cooled. This enables the thermal management system to effectively cool the thermally managed object, and at the same time, it can reduce the continuous operating time of the first fan unit and / or the second fan unit to a certain extent, thereby improving the performance and service life of the first fan unit and / or the second fan unit.

[0150] Figure 4 is a flowchart illustrating the thermal management method provided in an embodiment of this application.

[0151] The thermal management method is applied to a thermal management system, which includes a first fan unit and a first heat dissipation device. The thermal management system also includes a second fan unit and a second heat dissipation device. The first fan unit is used to dissipate heat from the first heat dissipation device, and the second fan unit is used to dissipate heat from the second heat dissipation device.

[0152] 410. Obtain the thermal management parameters of the thermal management system.

[0153] The thermal management system includes a liquid cooling system, and the first and second heat dissipation devices belong to the liquid cooling system; the thermal management parameters include the temperature T of the liquid cooling system.

[0154] As an example, the first and second heat dissipation devices can be connected in series in the main flow path of the coolant channel of the liquid cooling system. Alternatively, as shown in Figure 2, the first and second heat dissipation devices can be connected in parallel in the main flow path of the coolant channel of the liquid cooling system.

[0155] 420a, under the condition that the temperature T of the liquid cooling system satisfies: T < T3, the operating strategies of the first fan unit and the second fan unit are determined based on the temperature T of the liquid cooling system.

[0156] When the temperature T of the liquid cooling system satisfies T < T3, the liquid cooling system can meet the cooling requirements of the thermally managed object. Therefore, in this case, the liquid cooling system can be used to cool the thermally managed object. The heat generated by the liquid cooling system in cooling the thermally managed object can be transferred to the external environment through heat dissipation devices in the liquid cooling system, such as the first heat dissipation device and / or the second heat dissipation device. To improve the speed and efficiency of heat transfer to the external environment, the operation of the first fan unit and / or the second fan unit can be controlled.

[0157] In this embodiment, when the temperature of the liquid cooling system T < T3, the operation of the first fan unit and the second fan unit can be reasonably controlled according to the temperature of the liquid cooling system to effectively dissipate heat from the heat dissipation device in the liquid cooling system. This allows the liquid cooling system to effectively cool the heat-managed object when its temperature is relatively low, and at the same time, it can reduce the operating time of the first fan unit and / or the second fan unit to a certain extent, thereby improving the performance and service life of the first fan unit and / or the second fan unit.

[0158] In some embodiments, when the temperature T of the liquid cooling system satisfies T < T3, the operating strategies of the first heat dissipation device and the second heat dissipation device are determined based on the temperature T of the liquid cooling system. The operating strategies of the first heat dissipation device and the second heat dissipation device are used to indicate whether the first heat dissipation device and the second heat dissipation device are operating.

[0159] As an example, when the first fan unit is running, its corresponding first heat dissipation device is also running. When the first fan unit stops running, its corresponding first heat dissipation device also stops running.

[0160] As an example, when the second fan is running, its corresponding second cooling device is also running. When the second fan unit stops running, its corresponding second cooling device also stops running.

[0161] In some embodiments, when the temperature T of the liquid cooling system satisfies T < T1, the operation strategy instructs the first and second fan units to stop operating; and / or, when the temperature T of the liquid cooling system satisfies T1 ≤ T < T2, the operation strategy instructs one of the first and second fan units to start operating; and / or, when the temperature T of the liquid cooling system satisfies T2 ≤ T < T3, the operation strategy instructs the first and second fan units to start operating.

[0162] It should be understood that, in this application, "stop running" can be interpreted as not starting or not running.

[0163] As an example, when the temperature T of the liquid cooling system satisfies T≤T1, the first and second heat dissipation devices in the liquid cooling system are started and operated, but the heat dissipation needs of the first and second heat dissipation devices can be met without the first and second fan units starting and operating, thereby meeting the cooling needs of the thermally managed object, such as when the external ambient temperature is low.

[0164] As an example, when the temperature T of the liquid cooling system satisfies T≤T1, the liquid cooling system is not started, and therefore the first heat dissipation device is also not started. That is to say, when the temperature of the thermally managed object, such as the battery, is within its allowable normal range, the first and second heat dissipation devices of the liquid cooling system do not need to be started, and in this case, the first and second fan units also do not need to be started.

[0165] As an example, when the temperature T of the liquid cooling system satisfies T1 ≤ T < T2, the liquid cooling system cools the thermally managed object. One of the first and second heat dissipation devices is activated. Therefore, only one fan unit from the first and second fan units corresponding to that heat dissipation device needs to be activated. Here, it can be assumed that the temperature of the liquid cooling system is not very high, and using only one of the first and second heat dissipation devices is sufficient to meet the cooling requirements of the thermally managed object. Therefore, only one fan unit corresponding to that heat dissipation device needs to be activated to dissipate heat from that heat dissipation device.

[0166] As an example, when the temperature T of the liquid cooling system satisfies T1 ≤ T < T2, the liquid cooling system cools the thermally managed object. Both the first and second heat dissipation devices are activated, and one of the first and second fan units is also activated. Here, it can be assumed that only by using both the first and second heat dissipation devices simultaneously can the cooling requirements of the thermally managed object be met. However, for the fan units, activating only one of the first and second fan units is sufficient to meet the cooling requirements of the thermally managed object.

[0167] As an example, when the temperature T of the liquid cooling system satisfies T2 ≤ T < T3, the liquid cooling system cools the object under thermal management, and both the first and second heat dissipation devices are activated. Since the temperature of the liquid cooling system is relatively high at this time, both the first and second fan units need to be activated to meet the cooling requirements of the object under thermal management.

[0168] In this embodiment of the application, when the temperature of the liquid cooling system is T < T3, the operation of the first fan unit and the second fan unit can be reasonably indicated according to the different temperature ranges of the thermal management object. The first fan unit and the second fan unit are not always in operation, which can reduce the operating time of the first fan unit and / or the second fan unit to a certain extent, and improve the performance and service life of the first fan unit and / or the second fan unit.

[0169] In some embodiments, when the temperature T of the liquid cooling system satisfies T1 ≤ T < T2, one of the first and second fan units starts operation. Even if the temperature of the thermal management system subsequently decreases to T < T1, that one fan unit from the first and second fan units continues to operate.

[0170] Similarly, when the temperature T of the liquid cooling system satisfies T2 ≤ T < T3, both the first and second fan units will start operating. Even if the temperature of the thermal management system subsequently drops to T < T2, the second fan unit will continue to operate.

[0171] In some embodiments, when the temperature T of the liquid cooling system satisfies: T1≤T<T2, the operation strategy instructs one of the first and second fan units to run for a first period of time, then one of the first and second fan units stops running, and the other fan unit starts running.

[0172] For example, if the temperature T of the liquid cooling system satisfies T1≤T<T2 for a relatively long time, after one fan unit starts running and runs for a first time, the one fan unit stops running and another fan unit starts running and runs for a first time, and then the other fan unit stops running, and the above steps are repeated.

[0173] In this embodiment, when the temperature T of the liquid cooling system satisfies T1 ≤ T < T2, the first and second fan units can operate alternately, effectively dissipating heat from the heat dissipation devices in the liquid cooling system, thereby achieving effective cooling of thermally managed objects such as batteries. Simultaneously, the first and second fan units are used as evenly as possible, ensuring their performance and lifespan are as consistent as possible, reducing the differences in performance and lifespan between the two fan units, and thus improving the overall performance and lifespan of the thermal management system. Furthermore, the first and second fan units are not always continuously operating, which can further reduce their usage time and improve their performance and lifespan.

[0174] In some embodiments, when the temperature T of the liquid cooling system satisfies T1≤T<T2, the operating frequencies of the first fan unit and the second fan unit are positively correlated with the temperature T of the liquid cooling system.

[0175] The operating frequency of the first and second fan units can increase as the temperature T of the liquid cooling system increases, or decrease as the temperature T of the liquid cooling system decreases.

[0176] There can be a positive correlation between the operating frequency of the first fan unit and the temperature T of the liquid cooling system. For example, a curve or table showing the correlation between the operating frequency of the first fan unit and the temperature T of the liquid cooling system could be used. Similarly, there can also be a positive correlation between the operating frequency of the second fan unit and the temperature of the liquid cooling system.

[0177] For example, if the temperature T of the liquid cooling system satisfies T1 ≤ T < T2, the starting operating frequency of the first fan unit can be determined based on the correspondence between the operating frequency of the first fan unit and the temperature of the liquid cooling system, as well as the temperature T of the liquid cooling system. The fan of the first fan unit starts operating at this starting operating frequency, and the operating frequency of the first fan unit is adjusted according to the temperature of the liquid cooling system.

[0178] After the first fan unit has been running for a certain period of time, it stops operating. The starting frequency of the second fan unit can be determined based on the current temperature T of the thermal management system, the relationship between the operating frequency of the second fan unit and the temperature T of the liquid cooling system. The second fan unit starts operating at this frequency, and its operating frequency is adjusted according to changes in the thermal management temperature.

[0179] In this embodiment, when the temperature T of the liquid cooling system satisfies T1≤T<T2, the operating frequencies of the first and second fan units can be adjusted based on the temperature of the liquid cooling system. This allows for reasonable and effective heat dissipation from the heat dissipation devices in the liquid cooling system, thereby achieving effective cooling of the thermally managed object; it also reduces the likelihood of the first and second fan units operating at high power for extended periods simultaneously, thus lowering energy consumption.

[0180] In some embodiments, when the temperature T of the liquid cooling system satisfies: T2≤T<T3, the operation strategy instructs the first fan unit to start operation and run continuously at a constant frequency, and instructs the second fan unit to start operation, and adjusts the operating frequency of the second fan unit based on the temperature of the liquid cooling system, wherein the operating frequency of the second fan unit is positively correlated with the temperature of the liquid cooling system.

[0181] In this embodiment, the operating frequency of the first fan unit is constant. The operating frequency of the second fan unit is positively correlated with the temperature of the liquid cooling system. When the first fan unit operates continuously at a constant frequency, the operating frequency of the second fan unit and the temperature of the liquid cooling system are positively correlated. If this constant frequency changes, the positive correlation between the operating frequency of the second fan unit and the temperature of the liquid cooling system will also change.

[0182] The operating frequency of the second fan unit is positively correlated with the temperature of the liquid cooling system. That is, as the temperature of the object under heat management increases, the operating frequency of the second fan unit increases; as the temperature of the object under heat management decreases, the operating frequency of the second fan unit decreases.

[0183] In this embodiment, when the temperature T of the liquid cooling system satisfies T2 ≤ T < T3, the first fan unit starts and operates continuously at a constant frequency, while the second fan unit starts and operates, with its operating frequency adjusted based on the temperature of the liquid cooling system. This effectively dissipates heat from the liquid cooling system's heat dissipation device and simplifies the control and adjustment of the first fan unit's operating frequency, making operation easier. Furthermore, it reduces the likelihood of both the first and second fan units operating simultaneously at high power for extended periods, thus lowering energy consumption.

[0184] In some embodiments, when the temperature T of the liquid cooling system satisfies: T2≤T<T3, the operating strategy instructs the fans of the first fan unit to operate continuously at their respective maximum allowed operating frequencies.

[0185] For example, the permissible operating frequency of each fan in the first fan unit can be a range, with the upper limit of the range being the maximum operating frequency of that fan.

[0186] In this embodiment of the application, when the temperature T of the liquid cooling system satisfies T2≤T<T3, the first fan unit can continuously operate at its maximum allowable operating frequency, which simplifies the control and adjustment of the operating frequency of the first fan unit and facilitates operation.

[0187] In some embodiments, when the temperature T of the liquid cooling system satisfies: T2≤T<T3, the operation strategy instructs the first fan unit and the second fan unit to start operation, and adjusts the operating frequency of the first fan unit and the second fan unit based on the temperature of the liquid cooling system. The operating frequency of the first fan unit and the second fan unit is positively correlated with the temperature of the liquid cooling system.

[0188] In this embodiment, when the temperature T of the liquid cooling system satisfies T2≤T<T3, both the first fan unit and the second fan unit start operation, and the operating frequencies of both the first fan unit and the second fan unit change with the temperature of the thermally managed object.

[0189] After the first and second fan units are started and running, if the temperature of the liquid cooling system decreases, the operating frequency of the first and second fan units will decrease; if the temperature of the liquid cooling system increases, the operating frequency of the first and second fan units will increase.

[0190] In this embodiment, when the temperature T of the liquid cooling system satisfies T2 ≤ T < T3, the fans of the first and second fan units are controlled to start and operate, and their operating frequencies are adjusted based on the temperature of the liquid cooling system. This allows for reasonable and effective heat dissipation from the liquid cooling system's heat dissipation devices, enabling efficient and effective cooling of the thermally managed object. It also reduces the likelihood of both the first and second fan units operating at high power for extended periods simultaneously, thus lowering energy consumption. Furthermore, the more balanced use of the fans in both fan units improves the consistency of their performance and lifespan, thereby enhancing the overall performance and lifespan of the thermal management system. Simultaneously, it reduces the likelihood of the first fan unit operating at high power for extended periods, further lowering its energy consumption.

[0191] In some embodiments, when the temperature T of the liquid cooling system satisfies T2≤T<T3, the operation strategy instructs the first fan unit and the second fan unit to start operation at the same operating frequency.

[0192] For example, in this embodiment, the fans of the first fan unit and the second fan unit are both fans of the same model.

[0193] In this embodiment, when the temperature T of the liquid cooling system satisfies T2≤T<T3, the start-up and operation frequencies of the first fan unit and the second fan unit are unified, which can simplify the control of the start-up and operation of the first fan unit and the second fan unit and facilitate operation.

[0194] 420b, when the temperature T of the liquid cooling system satisfies: T≥T3, the cooling of the thermally managed object using the first and second heat dissipation devices is stopped.

[0195] When the temperature T of the liquid cooling system satisfies T≥T3, the temperature of the liquid cooling system is relatively high. Under these circumstances, the liquid cooling system may no longer be able to meet the cooling requirements of the thermally managed object. Therefore, the cooling of the thermally managed object using the first and second heat dissipation devices can be stopped.

[0196] Stopping the use of the first and second heat dissipation devices to cool the thermally managed object can be understood as preventing the high-temperature coolant flowing through the thermally managed object from flowing into the first and second heat dissipation devices for heat dissipation. For example, this can be achieved by closing the first solenoid valve 2151 and the second solenoid valve 2152 in Figure 2.

[0197] 430b, when the temperature T of the liquid cooling system satisfies: T≥T3, the refrigerant system starts to run in order to cool the thermally managed object.

[0198] In some embodiments, the thermal management system further includes a refrigerant system.

[0199] When the temperature T of the liquid cooling system satisfies T≥T3, the temperature of the liquid cooling system is relatively high. A refrigerant system with a higher cooling capacity can be used to cool the thermally managed object to meet its cooling requirements.

[0200] 440b, Under the condition that the temperature T of the liquid cooling system satisfies: T≥T3, obtain the pressure P of the refrigerant system.

[0201] 450b, Based on the pressure P of the refrigerant system, determine the operating strategies of the first and second fan units.

[0202] The thermal management system also includes a refrigerant system, which includes a third heat dissipation device and a fourth heat dissipation device. The first fan unit is also used to dissipate heat for the third heat dissipation device, and the second fan unit is also used to dissipate heat for the fourth heat dissipation device.

[0203] When the temperature T of the liquid cooling system satisfies T≥T3, the refrigerant system engages to cool the thermally managed object. During the operation of the refrigerant system, the pressure P of the refrigerant system changes.

[0204] Normally, when the refrigerant system is not running (e.g., the liquid cooling system is running), the pressure P of the refrigerant system is relatively low, and may even be 0.

[0205] The pressure of the refrigerant system can be measured by the pressure in the refrigerant flow channels of the refrigerant system.

[0206] For example, the pressure of the refrigerant system is determined based on the pressure of the refrigerant at the compressor inlet and / or outlet, as shown in Figure 2. For instance, the pressure of the refrigerant at the compressor inlet can be used as the pressure of the refrigerant system.

[0207] In this embodiment, when the temperature T of the liquid cooling system is greater than or equal to T3, the pressure P of the refrigerant system can also be obtained. Based on this pressure information, the operation of the first fan unit and the second fan unit can be reasonably indicated. This allows for effective heat dissipation of the third and fourth heat dissipation devices in the refrigerant system by the first and second fan units, thereby enabling the refrigerant system to effectively cool the thermally managed object. Simultaneously, it can reduce the operating time of the first and / or second fan units to a certain extent, improving their performance and service life.

[0208] In some embodiments, when the refrigerant system pressure P satisfies: P < P1, the operation strategy instructs the first and second fan units to stop operating; and / or, when the refrigerant system pressure P satisfies: P1 ≤ P < P2, the operation strategy instructs one of the first and second fan units to start operating; and / or, when the refrigerant system pressure P satisfies: P2 ≤ P < P3, the operation strategy instructs the first and second fan units to start operating; and / or, when the refrigerant system pressure P satisfies: P ≥ P3, the operation strategy instructs the first and second fan units to stop operating.

[0209] As an example, when the pressure P of the refrigerant system satisfies: P < P1, the third and fourth heat dissipation devices in the refrigerant system are started and operated. However, the first and second fan units do not need to be started and operated to meet the heat dissipation needs of the third and fourth heat dissipation devices, thereby meeting the cooling needs of the thermally managed objects, such as when the external ambient temperature is low.

[0210] As an example, when the refrigerant system pressure P satisfies the condition that P < P1, the refrigerant system is not started, and therefore the third heat dissipation device is also not started. In other words, if the temperature of thermally managed objects such as batteries is within their allowable normal range, the third and fourth heat dissipation devices of the refrigerant system do not need to be started. In this case, the first and second fan units also do not need to be started.

[0211] As an example, when the refrigerant system pressure P satisfies P1 ≤ P < P2, the refrigerant system cools the thermally managed object. One of the third and fourth heat dissipation devices is activated. Therefore, only one fan unit from the first and second fan units corresponding to that heat dissipation device needs to be activated. Here, it can be assumed that the refrigerant system pressure is not very high, and using one of the third and fourth heat dissipation devices is sufficient to meet the cooling requirements of the thermally managed object. Therefore, only one fan unit corresponding to that heat dissipation device needs to be activated to dissipate heat from that heat dissipation device.

[0212] As an example, when the refrigerant system pressure P satisfies P1 ≤ P < P2, the refrigerant system cools the thermally managed object. Both the third and fourth heat dissipation devices are activated, and one of the first and second fan units is also activated. Here, it can be assumed that only by utilizing both the third and fourth heat dissipation devices simultaneously can the cooling requirements of the thermally managed object be met. However, for the fan units, activating only one of the first and second fan units is sufficient to meet the cooling requirements of the thermally managed object.

[0213] As an example, when the refrigerant system pressure P satisfies P2 ≤ P < P3, the refrigerant system cools the thermally managed object, and both the third and fourth heat dissipation devices are activated. Since the refrigerant system pressure is relatively high at this time, both the first and second fan units need to be activated to meet the cooling requirements of the thermally managed object.

[0214] In this embodiment, when the refrigerant system pressure P≥P3, the operation of the first fan unit and the second fan unit can be reasonably controlled according to the refrigerant system pressure to effectively dissipate heat from the heat dissipation device in the refrigerant system. This allows the refrigerant system to effectively cool the heat-managed object when its temperature is relatively high, and at the same time, it can reduce the operating time of the first fan unit and / or the second fan unit to a certain extent, thereby improving the performance and service life of the first fan unit and / or the second fan unit.

[0215] In some embodiments, when the refrigerant system pressure P satisfies P1 ≤ P < P2, one of the first and second fan units starts operation. Even if the temperature of the thermal management system subsequently decreases to P < P1, this one fan unit continues to operate.

[0216] Similarly, when the refrigerant system pressure P satisfies P2 ≤ P < P3, both the first and second fan units will start operating. Even if the temperature of the thermal management system subsequently drops to P < P2, the second fan unit will continue to operate.

[0217] In some embodiments, when the pressure P of the refrigerant system satisfies: P1≤P<P2, the operating strategy instructs one of the first and second fan units to start operating for a second period of time, after which one of the first and second fan units stops operating, and the other fan unit starts operating.

[0218] For example, if the pressure P of the refrigerant system satisfies P1≤P<P2 for a relatively long time, after one fan unit starts running and operates for a first period of time, that fan unit stops running, and after another fan unit starts running and operates for a first period of time, that other fan unit stops running, and the above steps are repeated.

[0219] In this embodiment, when the refrigerant system pressure P satisfies P1≤P<P2, the first and second fan units can operate alternately, effectively dissipating heat from the heat dissipation devices in the refrigerant system, thereby achieving effective cooling of thermally managed objects such as batteries. Simultaneously, the first and second fan units are used as evenly as possible, ensuring their performance and lifespan are as consistent as possible, reducing the differences in performance and lifespan between the two units, and thus improving the overall performance and lifespan of the thermal management system. Furthermore, the first and second fan units are not always continuously operating, which can further reduce their usage time and improve their performance and lifespan.

[0220] In some embodiments, when the refrigerant system pressure P satisfies: P1≤P<P2, the operating frequency of the first fan unit and the second fan unit is positively correlated with the refrigerant system pressure.

[0221] The operating frequency of the first and second fan units can increase as the pressure P of the refrigerant system increases, or decrease as the pressure P of the refrigerant system decreases.

[0222] There can be a positive correlation between the operating frequency of the first fan unit and the refrigerant system pressure P. For example, a curve or table showing the correlation between the operating frequency of the first fan unit and the refrigerant system pressure P can be used. Similarly, there can also be a positive correlation between the operating frequency of the second fan unit and the refrigerant system pressure.

[0223] For example, if the refrigerant system pressure P satisfies P1 ≤ P < P2, the starting frequency of the first fan unit can be determined based on the correspondence between the operating frequency of the first fan unit and the refrigerant system pressure, as well as the refrigerant system pressure P. The fan of the first fan unit starts operating at this starting frequency, and the operating frequency of the first fan unit is adjusted according to the refrigerant system pressure.

[0224] After the first fan unit has been running for a certain period of time, it stops operating. The starting frequency of the second fan unit can be determined based on the relationship between the temperature P of the thermal management system at that time, the operating frequency of the second fan unit, and the pressure P of the refrigerant system. The second fan unit starts operating at this frequency, and its operating frequency is adjusted according to changes in the thermal management temperature.

[0225] In this embodiment, when the refrigerant system pressure P satisfies P1≤P<P2, the operating frequencies of the first and second fan units can be adjusted based on the refrigerant system pressure. This allows for reasonable and effective heat dissipation of the heat dissipation devices in the refrigerant system, thereby achieving effective cooling of the thermally managed object; simultaneously, it reduces the likelihood of the first and second fan units operating at high power for extended periods, thus lowering energy consumption.

[0226] In some embodiments, when the pressure P of the refrigerant system satisfies: P2≤P<P3, the operating strategy instructs the fan of the first fan unit to operate continuously at a constant frequency, and instructs the second fan unit to adjust its operating frequency based on the refrigerant pressure.

[0227] In this embodiment, the operating frequency of the first fan unit is constant. The operating frequency of the second fan unit is positively correlated with the pressure of the refrigerant system. When the first fan unit operates continuously at a constant frequency, the operating frequency of the second fan unit and the pressure of the refrigerant system are positively correlated. If this constant frequency changes, the positive correlation between the operating frequency of the second fan unit and the pressure of the refrigerant system will also change.

[0228] The operating frequency of the second fan unit is positively correlated with the pressure of the refrigerant system. That is, as the temperature of the object under heat management increases, the operating frequency of the second fan unit increases; as the temperature of the object under heat management decreases, the operating frequency of the second fan unit decreases.

[0229] In this embodiment, when the refrigerant system pressure P satisfies P2≤P≤P3, the first fan unit starts and operates continuously at a constant frequency, while the second fan unit starts and its operating frequency is adjusted based on the refrigerant system pressure. This effectively dissipates heat from the refrigerant system's cooling device and simplifies the control and adjustment of the first fan unit's operating frequency, making operation easier. Furthermore, it reduces the likelihood of both the first and second fan units operating at high power for extended periods simultaneously, thus lowering energy consumption.

[0230] In some embodiments, when the pressure P of the refrigerant system satisfies: P2≤P<P3, the operating strategy instructs the fans of the first fan unit to operate continuously at their respective maximum permissible operating frequencies.

[0231] For example, the permissible operating frequency of each fan in the first fan unit can be a range, with the upper limit of the range being the maximum operating frequency of that fan.

[0232] In this embodiment, when the pressure P of the refrigerant system satisfies P2≤P<P3, the first fan unit can continuously operate at its maximum permissible operating frequency, which simplifies the control and adjustment of the operating frequency of the first fan unit and facilitates operation.

[0233] In some embodiments, when the refrigerant system pressure P satisfies: P2≤P<P3, the operation strategy instructs the first fan unit and the second fan unit to start operation, including: when the refrigerant system pressure P satisfies: P2≤P<P3, the operation strategy instructs the first fan unit and the second fan unit to start operation, and adjusts the operating frequency of the first fan unit and the second fan unit based on the refrigerant system pressure, wherein the operating frequency of the first fan unit and the second fan unit is positively correlated with the refrigerant system pressure.

[0234] In this embodiment, when the pressure P of the refrigerant system satisfies: P2≤P<P3, both the first fan unit and the second fan unit start operation, and the operating frequency of both the first fan unit and the second fan unit changes with the temperature of the thermally managed object.

[0235] After the first and second fan units are started and running, if the pressure of the refrigerant system decreases, the operating frequency of the first and second fan units will decrease; if the pressure of the refrigerant system increases, the operating frequency of the first and second fan units will increase.

[0236] In this embodiment, when the refrigerant system pressure P satisfies P2≤P<P3, the fans of the first and second fan units are controlled to start and operate, and their operating frequencies are adjusted based on the refrigerant system pressure. This allows for reasonable and effective heat dissipation from the refrigerant system's heat dissipation devices, enabling efficient and effective cooling of the thermally managed object. It also reduces the likelihood of both fan units operating at high power for extended periods simultaneously, thus lowering energy consumption. Furthermore, the more balanced use of the fans in both fan units improves the consistency of their performance and lifespan, thereby enhancing the overall performance and lifespan of the thermal management system. Simultaneously, it reduces the likelihood of the first fan unit operating at high power for extended periods, further lowering its energy consumption.

[0237] In some embodiments, when the pressure P of the refrigerant system satisfies: P2≤P<P3, the operating strategy instructs the fans of the first fan unit and the second fan unit to start operating at the same operating frequency.

[0238] For example, in this embodiment, the fans of the first fan unit and the second fan unit are both fans of the same model.

[0239] In this embodiment, when the pressure P of the refrigerant system satisfies: P2≤P<P3, the start-up and operation frequencies of the first fan unit and the second fan unit are unified, which can simplify the control of the start-up and operation of the first fan unit and the second fan unit and facilitate operation.

[0240] Figure 5 is a flowchart illustrating the thermal management method provided in an embodiment of this application.

[0241] The thermal management system includes a first fan unit and a first heat dissipation device. The thermal management system also includes a second fan unit and a second heat dissipation device. The first fan unit is used to dissipate heat from the first heat dissipation device, and the second fan unit is used to dissipate heat from the second heat dissipation device.

[0242] In some embodiments, the thermal management system includes a liquid cooling system, and the first heat dissipation device and the second heat dissipation device belong to the liquid cooling system; the thermal management parameters include the temperature T of the liquid cooling system.

[0243] In some embodiments, the thermal management system further includes a refrigerant system, which includes a third heat dissipation device and a fourth heat dissipation device. A first fan unit is also used to dissipate heat for the third heat dissipation device, and a second fan unit is also used to dissipate heat for the fourth heat dissipation device.

[0244] 510, obtain the temperature T of the liquid cooling system.

[0245] 520a, when the temperature T of the liquid cooling system satisfies: T < T1, the first fan unit and the second fan unit are instructed to stop operating.

[0246] 520b, when the temperature T of the liquid cooling system satisfies: T1≤T<T2, instruct one of the first and second fan units to start operation.

[0247] In some embodiments, when the temperature T of the liquid cooling system satisfies: T1≤T<T2, after instructing one of the first and second fan units to run for a first period of time, one of the first and second fan units stops running, and the other fan unit in the first and second fan units starts running.

[0248] In some embodiments, the operating frequencies of the first and second fan units are positively correlated with the temperature T of the liquid cooling system.

[0249] At 520°C, when the temperature T of the liquid cooling system satisfies T2≤T<T3, the first and second fan units are instructed to start operation.

[0250] In some embodiments, when the temperature T of the liquid cooling system satisfies: T2≤T<T3, the operation strategy instructs the first fan unit to start operation and run continuously at a constant frequency, and instructs the second fan unit to start operation, and adjusts the operating frequency of the second fan unit based on the temperature of the liquid cooling system, wherein the operating frequency of the second fan unit is positively correlated with the temperature of the liquid cooling system.

[0251] In some embodiments, when the temperature T of the liquid cooling system satisfies: T2≤T<T3, the operating strategy instructs the fans of the first fan unit to operate continuously at their respective maximum allowed operating frequencies.

[0252] In some embodiments, when the temperature T of the liquid cooling system satisfies: T2≤T<T3, the operation strategy instructs the first fan unit and the second fan unit to start operation, and adjusts the operating frequency of the first fan unit and the second fan unit based on the temperature of the liquid cooling system. The operating frequency of the first fan unit and the second fan unit is positively correlated with the temperature of the liquid cooling system.

[0253] In some embodiments, when the temperature T of the liquid cooling system satisfies T2≤T<T3, the operation strategy instructs the first fan unit and the second fan unit to start operation at the same operating frequency.

[0254] 520d, when the temperature T of the liquid cooling system satisfies: T≥T3, the first and second heat dissipation devices stop cooling the thermally managed object.

[0255] 530d, when the temperature T of the liquid cooling system satisfies: T≥T3, the refrigerant system is started to cool the thermally managed object.

[0256] 540d, under the condition that the temperature T of the liquid cooling system satisfies: T≥T3, obtain the pressure P of the refrigerant system.

[0257] 550d-1, when the pressure P of the refrigerant system satisfies: P < P1, instructs the first and second fan units to stop operating.

[0258] 550d-2, when the pressure P of the refrigerant system satisfies: P1≤P<P2, instructs one of the first and second fan units to start operation.

[0259] In some embodiments, when the pressure P of the refrigerant system satisfies: P1≤P<P2, after instructing one of the first and second fan units to start running for a second period of time, one of the first and second fan units stops running, and the other fan unit starts running.

[0260] In some embodiments, when the refrigerant system pressure P satisfies: P1≤P<P2, the operating frequency of the first fan unit and the second fan unit is positively correlated with the refrigerant system pressure.

[0261] 550d-3, when the pressure P of the refrigerant system satisfies: P2≤P<P3, instructs the first and second fan units to start operation.

[0262] In some embodiments, when the refrigerant system pressure P satisfies: P2≤P<P3, the operation strategy instructs the first fan unit to start operation and run continuously at a constant frequency, and instructs the second fan unit to start operation and adjust the operating frequency of the second fan unit based on the refrigerant pressure.

[0263] In some embodiments, when the pressure P of the refrigerant system satisfies: P2≤P<P3, the operating strategy instructs the fans of the first fan unit to operate continuously at their respective maximum permissible operating frequencies.

[0264] In some embodiments, when the refrigerant system pressure P satisfies: P2≤P<P3, the operation strategy instructs the first fan unit and the second fan unit to start operation, and adjusts the operating frequency of the first fan unit and the second fan unit based on the refrigerant system pressure. The operating frequency of the first fan unit and the second fan unit is positively correlated with the refrigerant system pressure.

[0265] In some embodiments, when the pressure P of the refrigerant system satisfies: P2≤P<P3, the operating strategy instructs the fans of the first fan unit and the second fan unit to start operating at the same operating frequency.

[0266] 550d-4, when the pressure P of the refrigerant system satisfies: P≥P3, instructs the first and second fan units to stop operating.

[0267] 560d-4, when the pressure P of the refrigerant system satisfies: P≥P3, instructs the refrigerant system to stop cooling the thermally managed object.

[0268] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0269] The thermal management method of the present application embodiment has been described in detail above. The thermal management device of the present application embodiment will be described in detail below with reference to FIG6 and FIG7. The technical features described in the method embodiment are applicable to the following device embodiment.

[0270] Figure 6 is a schematic block diagram of a thermal management device provided in an embodiment of this application. As shown in Figure 6, the thermal management device 600 includes some or all of the following components.

[0271] A thermal management device is applied to a thermal management system. The thermal management system includes a first fan unit and a first heat dissipation device. The thermal management system also includes a second fan unit and a second heat dissipation device. The first fan unit is used to dissipate heat from the first heat dissipation device, and the second fan unit is used to dissipate heat from the second heat dissipation device.

[0272] The thermal management device 600 includes an acquisition unit 610 and a processing unit 620.

[0273] The acquisition unit 610 is used to acquire the thermal management parameters of the thermal management system; the processing unit 620 is used to determine the operating strategies of the first fan unit and the second fan unit based on the thermal management parameters, and the operating strategies indicate whether the first fan unit and the second fan unit should be operated.

[0274] In some embodiments, the thermal management system includes a liquid cooling system, and the first heat dissipation device and the second heat dissipation device belong to the liquid cooling system; the thermal management parameters include the temperature T of the liquid cooling system, and according to the thermal management parameters, the processing unit 620 is used to determine the operating strategy of the first fan unit and the second fan unit based on the temperature T of the liquid cooling system when the temperature T of the liquid cooling system satisfies: T < T3.

[0275] In some embodiments, the processing unit 620 is configured to instruct the first fan unit and the second fan unit to stop operating when the temperature T of the liquid cooling system satisfies: T < T1; or, instruct one of the first fan unit and the second fan unit to start operating when the temperature T of the liquid cooling system satisfies: T1 ≤ T < T2; or, instruct the first fan unit and the second fan unit to start operating when the temperature T of the liquid cooling system satisfies: T2 ≤ T < T3.

[0276] In some embodiments, the processing unit 620 is configured to, when the temperature T of the liquid cooling system satisfies: T1≤T<T2, instruct one of the first fan units and the second fan unit to start running for a first period of time, then stop running one of the first fan units and the second fan unit, and start running the other fan unit.

[0277] In some embodiments, when the temperature T of the liquid cooling system satisfies T1≤T<T2, the operating frequencies of the first fan unit and the second fan unit are positively correlated with the temperature T of the liquid cooling system.

[0278] In some embodiments, the processing unit 620 is configured to, when the temperature T of the liquid cooling system satisfies: T2≤T<T3, instruct the first fan unit to start operation and operate continuously at a constant frequency, and instruct the second fan unit to start operation, and adjust the operating frequency of the second fan unit based on the temperature of the liquid cooling system, wherein the operating frequency of the second fan unit is positively correlated with the temperature of the liquid cooling system.

[0279] In some embodiments, the processing unit 620 is configured to instruct the fans of the first fan unit to continue operating at their respective maximum permissible operating frequencies when the temperature T of the liquid cooling system satisfies: T2≤T<T3.

[0280] In some embodiments, the processing unit 620 is configured to instruct the first fan unit and the second fan unit to start operation when the temperature T of the liquid cooling system satisfies: T2≤T<T3, and to adjust the operating frequency of the first fan unit and the second fan unit based on the temperature of the liquid cooling system, wherein the operating frequency of the first fan unit and the second fan unit is positively correlated with the temperature of the liquid cooling system.

[0281] In some embodiments, the processing unit 620 is configured to instruct the first fan unit and the second fan unit to start operation at the same operating frequency when the temperature T of the liquid cooling system satisfies: T2≤T<T3.

[0282] In some embodiments, the processing unit 620 is configured to stop cooling the thermally managed object when the temperature T of the liquid cooling system satisfies: T≥T3.

[0283] In some embodiments, the thermal management system further includes a refrigerant system and a processing unit 620, which is used to start the refrigerant system to cool the thermally managed object when the temperature T of the liquid cooling system satisfies: T≥T3.

[0284] In some embodiments, the thermal management system further includes a refrigerant system, which includes a third heat dissipation device and a fourth heat dissipation device. The first fan unit is also used to dissipate heat for the third heat dissipation device, and the second fan unit is also used to dissipate heat for the fourth heat dissipation device. The acquisition unit is used to acquire the pressure P of the refrigerant system when the temperature T of the liquid cooling system satisfies: T≥T3. The processing unit 620 is used to determine the operating strategies of the first fan unit and the second fan unit based on the pressure P of the refrigerant system.

[0285] In some embodiments, the processing unit 620 is configured to: instruct the first fan unit and the second fan unit to stop operating when the refrigerant system pressure P satisfies: P < P1; or instruct one of the first fan unit and the second fan unit to start operating when the refrigerant system pressure P satisfies: P1 ≤ P < P2; or instruct the first fan unit and the second fan unit to start operating when the refrigerant system pressure P satisfies: P2 ≤ P < P3; or instruct the first fan unit and the second fan unit to stop operating when the refrigerant system pressure P satisfies: P ≥ P3.

[0286] In some embodiments, the processing unit 620 is configured to, when the pressure P of the refrigerant system satisfies: P1≤P<P2, instruct one of the first fan units and the second fan unit to start running for a second period of time, then stop running one of the first fan units and the second fan unit, and start running the other fan unit.

[0287] In some embodiments, when the refrigerant system pressure P satisfies: P1≤P<P2, the operating frequency of the first fan unit and the second fan unit is positively correlated with the refrigerant system pressure.

[0288] In some embodiments, the processing unit 620 is configured to instruct the first fan unit to start operation and operate continuously at a constant frequency when the pressure P of the refrigerant system satisfies: P2≤P<P3, and to instruct the second fan unit to start operation and adjust the operating frequency of the second fan unit based on the pressure of the refrigerant.

[0289] In some embodiments, the processing unit 620 is configured to instruct the fans of the first fan unit to continue operating at their respective maximum permissible operating frequencies when the pressure P of the refrigerant system satisfies: P2≤P<P3.

[0290] In some embodiments, the processing unit 620 is configured to, when the pressure P of the refrigerant system satisfies: P2≤P<P3, instruct the first fan unit and the second fan unit to start operation, and adjust the operating frequency of the first fan unit and the second fan unit based on the pressure of the refrigerant system, wherein the operating frequency of the first fan unit and the second fan unit is positively correlated with the pressure of the refrigerant system.

[0291] In some embodiments, the processing unit 620 is configured to instruct the fans of the first fan unit and the second fan unit to start operating at the same operating frequency when the pressure P of the refrigerant system satisfies: P2≤P<P3.

[0292] It should be understood that the above and other operations and / or functions of the various modules in the thermal management device 600 are to implement the corresponding processes in the various methods of Figures 3 to 5, and for the sake of brevity, they will not be described in detail here.

[0293] Figure 7 shows a schematic block diagram of a thermal management device 1000 according to an embodiment of this application. As shown in Figure 7, the thermal management device 1000 includes a processor 1010 and a memory 1020, wherein the memory 1020 is used to store instructions, and the processor 1010 is used to read the instructions and execute the thermal management methods of the various embodiments of this application described above based on the instructions.

[0294] The memory 1020 can be a separate device independent of the processor 1010, or it can be integrated into the processor 1010.

[0295] Optionally, as shown in FIG7, the thermal management device 1000 may further include a transceiver 1030, which the processor 1010 can control to communicate with other devices. Specifically, it can send information or data to other devices, or receive information or data sent by other devices.

[0296] It should be understood that the processor in the embodiments of this application may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method embodiments can be completed by integrated logic circuits in the processor's hardware or by instructions in software form. The processor described above can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method.

[0297] It is understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0298] Optionally, embodiments of this application also provide a thermal management system, which includes the thermal management device provided in embodiments of this application.

[0299] Optionally, embodiments of this application also provide an energy storage system, which includes a battery, a thermal management system, and a thermal management device provided in embodiments of this application.

[0300] This application also provides a computer-readable storage medium for storing computer programs.

[0301] Optionally, the computer-readable storage medium can be applied to the control device of the fan in the embodiments of this application, and the computer program, when run on a computer, causes the computer to execute the corresponding processes implemented by the thermal management device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0302] This application also provides a computer program product, including computer program instructions.

[0303] Optionally, the computer program product can be applied to the control device of the fan in the embodiments of this application, and the computer program instructions, when run on the computer, cause the computer to execute the corresponding processes implemented by the thermal management device in the various methods of the embodiments of this application. For the sake of brevity, they will not be described in detail here.

[0304] This application also provides a computer program.

[0305] Optionally, the computer program can be applied to the control device of the fan in the embodiments of this application. When the computer program is run on the computer, it causes the computer to execute the corresponding processes implemented by the thermal management device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0306] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0307] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0308] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection involved in the embodiments of this application may be through some interfaces, and the indirect coupling or communication connection of devices or units may be electrical, mechanical, or other forms.

[0309] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0310] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0311] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0312] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A thermal management method applied to a thermal management system, the thermal management system comprising a first fan unit and a first heat dissipation device, the thermal management system further comprising a second fan unit and a second heat dissipation device, the first fan unit being used to dissipate heat from the first heat dissipation device, and the second fan unit being used to dissipate heat from the second heat dissipation device, characterized in that, The thermal management method includes: Obtain the thermal management parameters of the thermal management system; Based on the thermal management parameters, the operating strategies of the first fan unit and the second fan unit are determined, and the operating strategies indicate whether the first fan unit and the second fan unit are to be operated.

2. The thermal management method according to claim 1, characterized in that, The thermal management system includes a liquid cooling system, and the first heat dissipation device and the second heat dissipation device belong to the liquid cooling system; the thermal management parameters include the temperature T of the liquid cooling system, and determining the operating strategies of the first fan unit and the second fan unit in the thermal management system based on the thermal management parameters includes: When the temperature T of the liquid cooling system satisfies T < T3, the operating strategies of the first fan unit and the second fan unit are determined based on the temperature T of the liquid cooling system.

3. The thermal management method according to claim 2, characterized in that, The step of determining the operating strategies of the first fan unit and the second fan unit based on the temperature T of the liquid cooling system includes: When the temperature T of the liquid cooling system satisfies T < T1, the operating strategy instructs the first fan unit and the second fan unit to stop operating; or, When the temperature T of the liquid cooling system satisfies T1≤T<T2, the operating strategy instructs one of the first and second fan units to start operation; or, When the temperature T of the liquid cooling system satisfies T2≤T<T3, the operation strategy instructs the first fan unit and the second fan unit to start operation.

4. The thermal management method according to claim 3, characterized in that, When the temperature T of the liquid cooling system satisfies T1≤T<T2, the operating strategy instructs one of the first and second fan units to start operation, including: When the temperature T of the liquid cooling system satisfies T1≤T<T2, the operation strategy instructs one of the first and second fan units to start operation for a first period of time, then one of the first and second fan units stops operation, and the other fan unit starts operation.

5. The thermal management method according to claim 4, characterized in that, When the temperature T of the liquid cooling system satisfies T1≤T<T2, the operating frequencies of the first fan unit and the second fan unit are positively correlated with the temperature T of the liquid cooling system.

6. The thermal management method according to any one of claims 3 to 5, characterized in that, When the temperature T of the liquid cooling system satisfies T2≤T<T3, the operating strategy instructs the first fan unit and the second fan unit to start operation, including: When the temperature T of the liquid cooling system satisfies T2≤T<T3, the operation strategy instructs the first fan unit to start operation and run continuously at a constant frequency, and instructs the second fan unit to start operation, and adjusts the operating frequency of the second fan unit based on the temperature of the liquid cooling system, wherein the operating frequency of the second fan unit is positively correlated with the temperature of the liquid cooling system.

7. The thermal management method according to claim 6, characterized in that, When the temperature T of the liquid cooling system satisfies T2 ≤ T < T3, the operating strategy instructs the first fan unit to operate continuously at a constant frequency, including: When the temperature T of the liquid cooling system satisfies T2≤T<T3, the operation strategy instructs the fans of the first fan unit to operate continuously at their respective maximum allowed operating frequencies.

8. The thermal management method according to any one of claims 3 to 5, characterized in that, When the temperature T of the liquid cooling system satisfies T2≤T<T3, the operating strategy instructs the first fan unit and the second fan unit to start operation, including: When the temperature T of the liquid cooling system satisfies T2≤T<T3, the operation strategy instructs the first fan unit and the second fan unit to start operation, and adjusts the operating frequency of the first fan unit and the second fan unit based on the temperature of the liquid cooling system. The operating frequency of the first fan unit and the second fan unit is positively correlated with the temperature of the liquid cooling system.

9. The thermal management method according to any one of claims 3 to 5 and 8, characterized in that, When the temperature T of the liquid cooling system satisfies T2≤T<T3, the operating strategy instructs the first fan unit and the second fan unit to start operation, including: When the temperature T of the liquid cooling system satisfies T2≤T<T3, the operation strategy instructs the first fan unit and the second fan unit to start operation at the same operating frequency.

10. The thermal management method according to any one of claims 1 to 9, characterized in that, The thermal management method further includes: When the temperature T of the liquid cooling system satisfies T≥T3, the cooling of the thermally managed object using the first heat dissipation device and the second heat dissipation device shall be stopped.

11. The thermal management method according to any one of claims 1 to 10, characterized in that, The thermal management system further includes a refrigerant system, and the thermal management method further includes: When the temperature T of the liquid cooling system satisfies T≥T3, the refrigerant system is started to cool the thermally managed object.

12. The thermal management method according to any one of claims 1 to 11, characterized in that, The thermal management system further includes a refrigerant system, which includes a third heat dissipation device and a fourth heat dissipation device. The first fan unit is also used to dissipate heat for the third heat dissipation device, and the second fan unit is also used to dissipate heat for the fourth heat dissipation device. The thermal management method further includes: Under the condition that the temperature T of the liquid cooling system satisfies T≥T3, the pressure P of the refrigerant system is obtained; The operating strategies of the first fan unit and the second fan unit are determined based on the pressure P of the refrigerant system.

13. The thermal management method according to claim 12, characterized in that, Based on the pressure P of the refrigerant system, the operating strategies of the first fan unit and the second fan unit are determined, including: When the pressure P of the refrigerant system satisfies P < P1, the operating strategy instructs the first fan unit and the second fan unit to stop operating; or, When the pressure P of the refrigerant system satisfies P1≤P<P2, the operating strategy instructs one of the first and second fan units to start operation; or, When the pressure P of the refrigerant system satisfies P2 ≤ P < P3, the operating strategy instructs the first fan unit and the second fan unit to start operation; or, When the pressure P of the refrigerant system satisfies: P≥P3, the operating strategy instructs the first fan unit and the second fan unit to stop operating.

14. The thermal management method according to claim 13, characterized in that, When the pressure P of the refrigerant system satisfies: P1 ≤ P < P2, the operating strategy instructs one of the first and second fan units to start operation, including: When the pressure P of the refrigerant system satisfies: P1≤P<P2, the operation strategy instructs one of the first fan unit and the second fan unit to start operation for a second period of time, then one of the first fan unit and the second fan unit stops operation, and the other fan unit of the first fan unit and the second fan unit starts operation.

15. The thermal management method according to claim 13 or 14, characterized in that, When the pressure P of the refrigerant system satisfies: P1≤P<P2, the operating frequency of the first fan unit and the second fan unit is positively correlated with the pressure of the refrigerant system.

16. The thermal management method according to any one of claims 13 to 15, characterized in that, When the pressure P of the refrigerant system satisfies: P2 ≤ P < P3, the operating strategy instructs the first fan unit and the second fan unit to start operation, including: When the pressure P of the refrigerant system satisfies: P2≤P<P3, the operation strategy instructs the first fan unit to start operation and run continuously at a constant frequency, and instructs the second fan unit to start operation and adjust the operating frequency of the second fan unit based on the pressure of the refrigerant.

17. The thermal management method according to claim 16, characterized in that, When the pressure P of the refrigerant system satisfies: P2 ≤ P < P3, the operating strategy instructs the fan of the first fan unit to operate continuously at a constant frequency, including: When the pressure P of the refrigerant system satisfies: P2≤P<P3, the operating strategy instructs the fans of the first fan unit to operate continuously at their respective maximum permissible operating frequencies.

18. The thermal management method according to any one of claims 13 to 15, characterized in that, When the pressure P of the refrigerant system satisfies: P2 ≤ P < P3, the operating strategy instructs the first fan unit and the second fan unit to start operation, including: When the pressure P of the refrigerant system satisfies: P2≤P<P3, the operation strategy instructs the first fan unit and the second fan unit to start operation, and adjusts the operating frequency of the first fan unit and the second fan unit based on the pressure of the refrigerant system. The operating frequency of the first fan unit and the second fan unit is positively correlated with the pressure of the refrigerant system.

19. A thermal management device applied to a thermal management system, the thermal management system comprising a first fan unit and a first heat dissipation device, the thermal management system further comprising a second fan unit and a second heat dissipation device, the first fan unit being used to dissipate heat from the first heat dissipation device, and the second fan unit being used to dissipate heat from the second heat dissipation device, characterized in that, The thermal management device includes: The acquisition unit is used to acquire the thermal management parameters of the thermal management system; The processing unit is configured to determine the operating strategies of the first fan unit and the second fan unit based on the thermal management parameters, wherein the operating strategies indicate whether the first fan unit and the second fan unit are to be operated.

20. An energy storage system, characterized in that, The energy storage system includes a battery, a thermal management system for the battery, and a thermal management device as described in claim 19.

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