Rotation speed control method, device and equipment of liquid cooling fan and storage medium

Abstract

The embodiment of the invention provides a rotating speed control method and device of a liquid cooling fan, equipment and a storage medium. The method comprises the following steps: acquiring cell temperatures corresponding to a plurality of energy storage batteries in the energy storage system; if the maximum cell temperature of the plurality of energy storage batteries is greater than or equal to the preset refrigeration temperature, determining a first temperature difference between the maximum cell temperature and the preset refrigeration temperature; according to the first temperature difference, determining a target duty ratio corresponding to the liquid cooling fan from a pre-stored mapping relation between the temperature difference and the duty ratio; and the liquid cooling fan is controlled to operate at the target duty ratio, and the rotating speed of the liquid cooling fan is controlled by controlling the duty ratio of the liquid cooling fan. According to the rotating speed control method, on the premise that safe operation of the energy storage system is guaranteed, collaborative optimization of the energy efficiency and the heat dissipation effect is achieved, and therefore the overall operation efficiency of the liquid cooling draught fan is improved.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a method, device, equipment and storage medium for controlling the speed of a liquid-cooled fan. Background Technology

[0002] Energy storage systems (such as energy storage containers) generate a lot of heat during operation, which needs to be dissipated through liquid cooling systems to maintain the cell temperature within a safe range.

[0003] In related technologies, liquid cooling systems include liquid-cooled fans, condensers, and circulating pumps. Currently, the liquid-cooled fans in liquid cooling systems operate in a fixed-frequency mode, meaning they run continuously at a fixed frequency (e.g., 60Hz), dissipating heat through the condenser and circulating pump.

[0004] However, due to the use of a fixed-frequency operation mode, the liquid cooling fan runs at a high speed when the energy storage system load is low, resulting in excessive power consumption. When operating under high load, some cells may generate high temperatures due to concentrated current. The liquid cooling system cannot respond to the temperature changes of the cells in time, which may lead to overheating of the cells and affect heat dissipation efficiency. Summary of the Invention

[0005] This application provides a method, apparatus, device, and storage medium for controlling the speed of a liquid-cooled fan, in order to balance heat dissipation requirements and energy consumption control, and optimize the overall operating efficiency of the liquid-cooled fan.

[0006] In a first aspect, embodiments of this application provide a speed control method for a liquid-cooled fan, the speed control method comprising:

[0007] Obtain the cell temperature of each of the multiple energy storage batteries in the energy storage system;

[0008] If the maximum cell temperature of the plurality of energy storage batteries is greater than or equal to the preset cooling temperature, then a first temperature difference between the maximum cell temperature and the preset cooling temperature is determined.

[0009] Based on the first temperature difference, the target duty cycle corresponding to the liquid-cooled fan is determined from the pre-stored mapping relationship between temperature difference and duty cycle;

[0010] The liquid-cooled fan is controlled to operate at the target duty cycle, and the speed of the liquid-cooled fan is controlled by controlling the duty cycle of the liquid-cooled fan.

[0011] Optionally, the method further includes: if the maximum cell temperature of the plurality of energy storage batteries is less than the preset cooling temperature, determining a second temperature difference between the maximum cell temperature and the minimum cell temperature of the plurality of energy storage batteries; and controlling the operating mode of the liquid cooling fan based on the second temperature difference and the current operating mode of the liquid cooling fan.

[0012] Optionally, controlling the operating mode of the liquid-cooled fan based on the second temperature difference and the current operating mode of the liquid-cooled fan includes: if the current operating mode is a cooling mode, and the second temperature difference is greater than or equal to a first preset temperature threshold, then controlling the liquid-cooled fan to switch to a pump circulation mode; if the second temperature difference is less than the first preset temperature threshold, then determining whether the second temperature difference is less than a second preset temperature threshold; if the second temperature difference is less than the second preset temperature threshold, then controlling the liquid-cooled fan to switch to a shutdown mode; if the second temperature difference is greater than or equal to the second preset temperature threshold, then controlling the liquid-cooled fan to switch to a pump circulation mode.

[0013] Optionally, the method further includes: if the current operating mode is a shutdown mode or a pump circulation mode, and the second temperature difference is less than the first preset temperature threshold and greater than the second preset temperature threshold, then the liquid cooling fan is controlled to maintain the current operating mode.

[0014] Optionally, the method further includes: if the current operating mode is a shutdown mode or a pump circulation mode, and the maximum cell temperature is greater than or equal to the preset cooling temperature, then the liquid cooling fan is controlled to switch to the cooling mode.

[0015] Optionally, obtaining the cell temperature corresponding to each of the multiple energy storage batteries in the energy storage system includes: obtaining the cell temperature corresponding to each of the multiple energy storage batteries in the energy storage system through the battery management system at a preset cycle.

[0016] Secondly, embodiments of this application provide a speed control device for a liquid-cooled fan, the speed control device comprising:

[0017] The acquisition module is used to acquire the cell temperature of each of the multiple energy storage batteries in the energy storage system.

[0018] The first determining module is used to determine a first temperature difference between the maximum cell temperature and the preset cooling temperature if the maximum cell temperature of the plurality of energy storage batteries is greater than or equal to the preset cooling temperature.

[0019] The second determining module is used to determine the target duty cycle corresponding to the liquid-cooled fan based on the first temperature difference and from the pre-stored mapping relationship between temperature difference and duty cycle.

[0020] The control module is used to control the liquid-cooled fan to operate at the target duty cycle, and to control the speed of the liquid-cooled fan by controlling the duty cycle of the liquid-cooled fan.

[0021] Thirdly, embodiments of this application provide an electronic device, including: a memory and a processor;

[0022] The memory stores instructions that the computer executes;

[0023] The processor executes computer execution instructions stored in memory, causing the processor to perform various possible implementations as described above.

[0024] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement various possible implementations as described in any of the above aspects.

[0025] Fifthly, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements various possible implementations as described in any of the above aspects.

[0026] The present application provides a method, apparatus, device, and storage medium for controlling the speed of a liquid-cooled fan. The speed control method includes: acquiring the cell temperature of each of multiple energy storage batteries in an energy storage system; if the maximum cell temperature of the multiple energy storage batteries is greater than or equal to a preset cooling temperature, determining a first temperature difference between the maximum cell temperature and the preset cooling temperature; determining a target duty cycle of the liquid-cooled fan based on the first temperature difference and from a pre-stored mapping relationship between temperature difference and duty cycle; controlling the liquid-cooled fan to operate at the target duty cycle, thereby controlling the speed of the liquid-cooled fan by controlling the duty cycle of the liquid-cooled fan. In this embodiment, the first temperature difference between the maximum cell temperature and the preset cooling temperature is used as the basis for adjusting the speed of the liquid-cooled fan. This solves the problems of energy waste and insufficient dynamic response in the traditional fixed-frequency operation mode. This application determines the urgency of the current heat dissipation demand by calculating the first temperature difference, and determines the target duty cycle of the liquid-cooled fan according to the temperature difference duty cycle mapping relationship. By controlling the duty cycle of the liquid-cooled fan, the speed of the liquid-cooled fan can be controlled. When the energy storage system load is low, the power consumption of the liquid-cooled fan can be reduced by reducing the speed of the liquid-cooled fan. When the energy storage system is running under high load, the speed of the liquid-cooled fan can be increased to respond to the temperature changes of the cell in a timely manner and avoid the cell overheating. It can be seen that the speed control method provided by this application achieves synergistic optimization of energy efficiency and heat dissipation effect while ensuring the safe operation of the energy storage system, thus improving the overall operating efficiency of the liquid-cooled fan. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0028] Figure 1 A flowchart illustrating a method for controlling the speed of a liquid-cooled fan, as provided in an embodiment of this application;

[0029] Figure 2 A schematic diagram illustrating a speed control method for a liquid-cooled fan provided in an embodiment of this application;

[0030] Figure 3 A schematic diagram of another speed control method for a liquid-cooled fan provided in an embodiment of this application;

[0031] Figure 4 A structural diagram of a speed control device for a liquid-cooled fan provided in an embodiment of this application;

[0032] Figure 5 A schematic diagram of the structure of the electronic device provided in this application.

[0033] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0034] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0035] Energy storage systems (such as energy storage containers) generate a lot of heat during operation, which needs to be dissipated through liquid cooling systems to maintain the cell temperature within a safe range.

[0036] In related technologies, liquid cooling systems include liquid-cooled fans, condensers, and circulating pumps. Currently, the liquid-cooled fans in these systems operate at a fixed frequency, meaning they run continuously at a fixed frequency (e.g., 60Hz), dissipating heat through the condenser and circulating pump. However, within energy storage containers or cabinets, the temperature distribution of the battery cells is often uneven. When the energy storage system load is low, the liquid-cooled fans operate at high speeds, leading to excessive power consumption and increased operating costs. Under high loads, localized battery cells may experience high temperatures due to concentrated current, and the liquid cooling system may not be able to respond promptly to these temperature changes, potentially causing overheating and affecting heat dissipation efficiency.

[0037] Therefore, there is an urgent need for a control method based on real-time temperature dynamic adjustment of fan speed to balance heat dissipation demand and energy consumption control, and optimize the overall operating efficiency of energy storage system.

[0038] To address the aforementioned technical problems, this application provides a speed control method for a liquid-cooled fan. This method includes: first, acquiring the cell temperatures of multiple energy storage batteries in an energy storage system; if the maximum cell temperature of the multiple energy storage batteries is greater than or equal to a preset cooling temperature, determining a first temperature difference between the maximum cell temperature and the preset cooling temperature; then, based on the first temperature difference, determining a target duty cycle for the liquid-cooled fan from a pre-stored mapping relationship between temperature differences and duty cycles; and finally, controlling the liquid-cooled fan to operate at the target duty cycle, thereby controlling the speed of the liquid-cooled fan by controlling its duty cycle.

[0039] In this embodiment, the first temperature difference between the maximum cell temperature and the preset cooling temperature is used as the basis for adjusting the speed of the liquid-cooled fan. The urgency of the current heat dissipation demand is determined by calculating the first temperature difference, and the target duty cycle of the liquid-cooled fan is determined according to the temperature difference duty cycle mapping relationship. The speed of the liquid-cooled fan is controlled by controlling the duty cycle of the liquid-cooled fan. When the energy storage system load is low, the power consumption of the liquid-cooled fan can be reduced by reducing the speed of the liquid-cooled fan. When the energy storage system is running under high load, the speed of the liquid-cooled fan can be increased to respond to the temperature changes of the cell in a timely manner and avoid the cell overheating. It can be seen that the speed control method provided by this application achieves synergistic optimization of energy efficiency and heat dissipation effect while ensuring the safe operation of the energy storage system, thus improving the overall operating efficiency of the liquid-cooled fan.

[0040] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0041] Figure 1 A flowchart illustrating a speed control method for a liquid-cooled fan provided in this application embodiment is shown below. Figure 1 As shown, the speed control method of this liquid-cooled fan includes:

[0042] S101. Obtain the cell temperature of each of the multiple energy storage batteries in the energy storage system.

[0043] In this embodiment of the application, multiple energy storage batteries in the energy storage system generate heat during charging and discharging, which needs to be dissipated through a liquid cooling system to maintain the cell temperature of the energy storage batteries within a safe range.

[0044] In some embodiments, the cell temperature of each of the multiple energy storage batteries in the energy storage system can be obtained through the Battery Management System (BMS).

[0045] In this embodiment, the battery type of the multiple energy storage batteries in the energy storage system is not specifically limited. Optionally, the energy storage batteries can be lithium-ion batteries, lithium iron phosphate batteries, or lead-acid batteries.

[0046] In some embodiments, such as Figure 2 As shown, the cell temperature of each of the multiple energy storage batteries in the energy storage system can be periodically acquired; correspondingly, this step may include: acquiring the cell temperature of each of the multiple energy storage batteries in the energy storage system according to a preset cycle through the battery management system.

[0047] In this embodiment, the duration of the cycle is not specifically limited. For example, the cell temperature of each of the multiple energy storage batteries in the energy storage system can be obtained every 5 minutes.

[0048] In other embodiments, to avoid frequent adjustments to the fan speed caused by instantaneous fluctuations in cell temperature, a sliding window averaging algorithm can be introduced. Optionally, for each energy storage battery, the cell temperature can be averaged according to the sliding window duration, and then the average temperature difference can be calculated. For example, if the sliding window duration is 5 minutes, the current cell temperature can be averaged with the cell temperatures of the previous 5 minutes to obtain the cell temperature of the energy storage battery.

[0049] S102. If the maximum cell temperature of multiple energy storage batteries is greater than or equal to the preset cooling temperature, then determine the first temperature difference between the maximum cell temperature and the preset cooling temperature.

[0050] In some embodiments, if the maximum cell temperature of multiple energy storage batteries is greater than or equal to a preset cooling temperature, the liquid cooling fan is controlled to enter the cooling mode.

[0051] Optionally, if the current operating mode is either shutdown mode or pump circulation mode, and the maximum cell temperature is greater than or equal to the preset cooling temperature, the liquid cooling fan is switched to cooling mode, and the liquid cooling fan is started. If the current operating mode is cooling mode, and the maximum cell temperature is greater than or equal to the preset cooling temperature, the operating mode of the liquid cooling fan is not switched.

[0052] In this embodiment of the application, the value of the preset cooling temperature is not specifically limited. For example, the preset cooling temperature may be 28°C, 30°C, or 31°C, etc.

[0053] In some embodiments, when the liquid-cooled fan is in cooling mode, the urgency of the current heat dissipation demand can be determined by the first temperature difference between the maximum cell temperature and the preset cooling temperature, thereby controlling the speed and operating mode of the liquid-cooled fan.

[0054] Optionally, such as Figure 2As shown, after obtaining the cell temperature, it can be determined whether the maximum cell temperature is greater than the preset cooling temperature. If so, the first temperature difference between the maximum cell temperature and the preset cooling temperature is determined, and the speed of the liquid cooling fan is controlled according to the first temperature difference; if not, the liquid cooling fan is controlled to stop.

[0055] In other embodiments, when the liquid-cooled fan is in cooling mode, the speed and operating mode of the liquid-cooled fan can be controlled by the maximum and minimum cell temperatures.

[0056] Optionally, such as Figure 3 As shown, after obtaining the cell temperature, it can be determined whether the maximum cell temperature is greater than the preset cooling temperature. If so, the first temperature difference between the maximum cell temperature and the preset cooling temperature is determined, and the speed of the liquid cooling fan is controlled according to the first temperature difference. If not, the second temperature difference between the maximum cell temperature and the minimum cell temperature is determined. The operating mode of the liquid cooling fan is controlled according to the second temperature difference and the current operating mode of the liquid cooling fan.

[0057] In this embodiment of the application, the abnormal fluctuations in cell temperature can be identified by the second temperature difference between the maximum and minimum cell temperatures, thus avoiding system failures caused by local overheating.

[0058] Optionally, based on the second temperature difference and the current operating mode of the liquid-cooled fan, the operating mode of the liquid-cooled fan is controlled, including: if the current operating mode is cooling mode, and the second temperature difference is greater than or equal to the first preset temperature threshold, then the liquid-cooled fan is controlled to switch to pump circulation mode; if the second temperature difference is less than the first preset temperature threshold, then it is determined whether the second temperature difference is less than the second preset temperature threshold; if the second temperature difference is less than the second preset temperature threshold, then the liquid-cooled fan is controlled to switch to shutdown mode; if the second temperature difference is greater than or equal to the second preset temperature threshold, then the liquid-cooled fan is controlled to switch to pump circulation mode.

[0059] Optionally, the current operating mode is either shutdown mode or pump circulation mode. If the second temperature difference is less than the first preset temperature threshold and greater than the second preset temperature threshold, the liquid cooling fan is controlled to maintain the current operating mode.

[0060] In this embodiment, controlling the liquid-cooled fan to maintain its current operating mode can avoid frequent switching between pump circulation mode and shutdown mode, thereby improving the working stability of the liquid-cooled fan.

[0061] In cooling mode, both the circulation pump and compressor need to be started. The circulation pump circulates the refrigerant, and the compressor cools the refrigerant. In pump circulation mode, the circulation pump needs to be started, but the compressor does not. In shutdown mode, neither the circulation pump nor the compressor starts.

[0062] In this embodiment, the values ​​of the first preset temperature threshold and the second preset temperature threshold are not specifically limited. Optionally, as... Figure 3 As shown, the first preset temperature threshold can be 6℃, and the second preset temperature threshold can be 3℃. If the second temperature difference is greater than or equal to 6℃, the liquid cooling fan is controlled to switch to pump circulation mode; if the second temperature difference is less than 6℃, it is further determined whether the second temperature difference is less than 3℃; if yes, the liquid cooling fan is controlled to switch to shutdown mode; if no, the liquid cooling fan is controlled to remain in shutdown mode or pump circulation mode.

[0063] S103. Based on the first temperature difference, determine the target duty cycle corresponding to the liquid-cooled fan from the pre-stored mapping relationship between temperature difference and duty cycle.

[0064] In some embodiments, the duty cycle is used to represent the percentage of time the liquid-cooled fan is powered on within a fixed period. For example, a duty cycle of 80% means that the liquid-cooled fan is powered on 80% of the time and powered off 20% of the time within a fixed period.

[0065] Optionally, a mapping relationship between temperature difference and duty cycle can be pre-stored. This mapping relationship can be a mapping table between temperature difference and duty cycle. For example, the mapping table between temperature difference and duty cycle is shown in Table 1 below. For example, if the first temperature difference is 6.5°C, then the target duty cycle of the liquid-cooled fan is determined to be 60%.

[0066] Table 1. Mapping relationship between temperature difference and duty cycle of liquid-cooled fan

[0067]

[0068] S104. Control the liquid-cooled fan to operate at the target duty cycle. The speed of the liquid-cooled fan is controlled by controlling the duty cycle of the liquid-cooled fan.

[0069] In this embodiment, the speed of the liquid-cooled fan can be dynamically adjusted according to the change of the first temperature difference. When the energy storage system load is low, the speed of the liquid-cooled fan is reduced by decreasing the duty cycle of the liquid-cooled fan, thereby reducing the power consumption of the liquid-cooled fan. When the energy storage system is running under high load, the speed of the liquid-cooled fan is increased by increasing the duty cycle of the liquid-cooled fan, thereby responding to the temperature change of the battery cell in a timely manner, avoiding overheating of the battery cell, realizing the synergistic optimization of energy efficiency and heat dissipation effect, and improving the overall operating efficiency of the liquid-cooled fan.

[0070] In this embodiment of the application, controlling the liquid-cooled fan to operate at a target duty cycle includes: obtaining the current duty cycle of the liquid-cooled fan, determining whether the current duty cycle is the same as the target duty cycle, if they are the same, then not adjusting the duty cycle of the liquid-cooled fan, if they are different, then sending a duty cycle adjustment command to the liquid-cooled fan, and controlling the liquid-cooled fan to operate at the target duty cycle through the duty cycle adjustment command.

[0071] This application provides a method for controlling the speed of a liquid-cooled fan: obtaining the cell temperature of each of the multiple energy storage batteries in the energy storage system; if the maximum cell temperature of the multiple energy storage batteries is greater than or equal to a preset cooling temperature, determining a first temperature difference between the maximum cell temperature and the preset cooling temperature; determining a target duty cycle for the liquid-cooled fan based on the first temperature difference from a pre-stored mapping relationship between temperature difference and duty cycle; controlling the liquid-cooled fan to operate at the target duty cycle, thereby controlling the speed of the liquid-cooled fan by controlling the duty cycle of the liquid-cooled fan. In this embodiment, the first temperature difference between the maximum cell temperature and the preset cooling temperature is used as the basis for adjusting the speed of the liquid-cooled fan. This solves the problems of energy waste and insufficient dynamic response in the traditional fixed-frequency operation mode. This application determines the urgency of the current heat dissipation demand by calculating the first temperature difference, and determines the target duty cycle of the liquid-cooled fan according to the temperature difference duty cycle mapping relationship. By controlling the duty cycle of the liquid-cooled fan, the speed of the liquid-cooled fan can be controlled. When the energy storage system load is low, the power consumption of the liquid-cooled fan can be reduced by reducing the speed of the liquid-cooled fan. When the energy storage system is running under high load, the speed of the liquid-cooled fan can be increased to respond to the temperature changes of the cell in a timely manner and avoid the cell overheating. It can be seen that the speed control method provided by this application achieves synergistic optimization of energy efficiency and heat dissipation effect while ensuring the safe operation of the energy storage system, thus improving the overall operating efficiency of the liquid-cooled fan.

[0072] Figure 4 This is a schematic diagram of a speed control device for a liquid-cooled fan provided in an embodiment of this application. Figure 4 As shown, the speed control device for the liquid-cooled fan includes:

[0073] The acquisition module 401 is used to acquire the cell temperature of each of the multiple energy storage batteries in the energy storage system.

[0074] The first determining module 402 is used to determine a first temperature difference between the maximum cell temperature and the preset cooling temperature if the maximum cell temperature of the plurality of energy storage batteries is greater than or equal to the preset cooling temperature.

[0075] The second determining module 403 is used to determine the target duty cycle corresponding to the liquid-cooled fan based on the first temperature difference and the pre-stored mapping relationship between temperature difference and duty cycle.

[0076] The control module 404 is used to control the liquid-cooled fan to operate at a target duty cycle, and to control the speed of the liquid-cooled fan by controlling the duty cycle of the liquid-cooled fan.

[0077] In one possible implementation, the control module 404 is further configured to determine a second temperature difference between the maximum cell temperature and the minimum cell temperature of the multiple energy storage batteries if the maximum cell temperature of the multiple energy storage batteries is less than the preset cooling temperature; and control the operating mode of the liquid cooling fan based on the second temperature difference and the current operating mode of the liquid cooling fan.

[0078] In one possible implementation, the control module 404 controls the operating mode of the liquid-cooled fan based on the second temperature difference and the current operating mode of the liquid-cooled fan, including: if the current operating mode is cooling mode, and if the second temperature difference is greater than or equal to the first preset temperature threshold, then the liquid-cooled fan is controlled to switch to pump circulation mode; if the second temperature difference is less than the first preset temperature threshold, then it is determined whether the second temperature difference is less than the second preset temperature threshold; if the second temperature difference is less than the second preset temperature threshold, then the liquid-cooled fan is controlled to switch to shutdown mode; if the second temperature difference is greater than or equal to the second preset temperature threshold, then the liquid-cooled fan is controlled to switch to pump circulation mode.

[0079] In one possible implementation, the control module 404 is also used to control the liquid cooling fan to maintain the current operating mode if the current operating mode is either a shutdown mode or a pump circulation mode, and the second temperature difference is less than the first preset temperature threshold and greater than the second preset temperature threshold.

[0080] In one possible implementation, the control module 404 is also used to control the liquid cooling fan to switch to cooling mode if the current operating mode is shutdown mode or pump circulation mode and the maximum cell temperature is greater than or equal to the preset cooling temperature.

[0081] In one possible implementation, the acquisition module 401 acquires the cell temperature of each of the multiple energy storage batteries in the energy storage system, including: acquiring the cell temperature of each of the multiple energy storage batteries in the energy storage system according to a preset cycle through the battery management system.

[0082] This application provides a speed control device for a liquid-cooled fan. By using the first temperature difference between the maximum cell temperature and the preset cooling temperature as the basis for adjusting the speed of the liquid-cooled fan, it solves the problems of energy waste and insufficient dynamic response in the traditional fixed-frequency operation mode. This application determines the urgency of the current heat dissipation demand by calculating the first temperature difference and determines the target duty cycle of the liquid-cooled fan according to the temperature difference duty cycle mapping relationship. By controlling the duty cycle of the liquid-cooled fan, the speed of the liquid-cooled fan can be controlled. When the energy storage system load is low, the power consumption of the liquid-cooled fan can be reduced by reducing the speed of the liquid-cooled fan. When the energy storage system is operating under high load, the speed of the liquid-cooled fan can be increased to respond to the temperature changes of the cell in a timely manner and avoid cell overheating. It can be seen that the speed control method provided by this application achieves synergistic optimization of energy efficiency and heat dissipation effect while ensuring the safe operation of the energy storage system, thus improving the overall operating efficiency of the liquid-cooled fan.

[0083] The speed control device for the liquid-cooled fan provided in this embodiment can execute the method provided in the above-described method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here.

[0084] Figure 5 A schematic diagram of the structure of the electronic device provided in this application. Figure 5 As shown, the electronic device 50 provided in this embodiment includes at least one processor 501 and a memory 502. Optionally, the device 50 further includes a communication component 503. The processor 501, memory 502, and communication component 503 are connected via a bus 504.

[0085] In a specific implementation, at least one processor 501 executes computer execution instructions stored in memory 502, causing at least one processor 501 to perform the above-described method.

[0086] The specific implementation process of processor 501 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0087] In the above embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0088] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0089] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0090] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.

[0091] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the above-described method.

[0092] The aforementioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0093] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.

[0094] The division of units is merely a logical functional division; 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. Furthermore, the coupling or direct coupling or electrical connection shown or discussed may be indirect coupling or electrical connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0095] 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.

[0096] In addition, the functional units in the various embodiments of the present invention 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.

[0097] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part 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 of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0098] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0099] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A method for controlling the speed of a liquid-cooled fan, characterized in that, The method includes: Obtain the cell temperature of each of the multiple energy storage batteries in the energy storage system; If the maximum cell temperature of the plurality of energy storage batteries is greater than or equal to the preset cooling temperature, then a first temperature difference between the maximum cell temperature and the preset cooling temperature is determined. Based on the first temperature difference, the target duty cycle corresponding to the liquid-cooled fan is determined from the pre-stored mapping relationship between temperature difference and duty cycle; The liquid-cooled fan is controlled to operate at the target duty cycle, and the speed of the liquid-cooled fan is controlled by controlling the duty cycle of the liquid-cooled fan.

2. The method according to claim 1, characterized in that, The method further includes: If the maximum cell temperature of the plurality of energy storage batteries is less than the preset cooling temperature, then a second temperature difference between the maximum cell temperature and the minimum cell temperature of the plurality of energy storage batteries is determined. The operating mode of the liquid-cooled fan is controlled based on the second temperature difference and the current operating mode of the liquid-cooled fan.

3. The method according to claim 2, characterized in that, The step of controlling the operating mode of the liquid-cooled fan based on the second temperature difference and the current operating mode of the liquid-cooled fan includes: The current operating mode is cooling mode. If the second temperature difference is greater than or equal to the first preset temperature threshold, the liquid cooling fan is controlled to switch to pump circulation mode. If the second temperature difference is less than the first preset temperature threshold, then determine whether the second temperature difference is less than the second preset temperature threshold. If the second temperature difference is less than the second preset temperature threshold, then control the liquid cooling fan to switch to the shutdown mode. If the second temperature difference is greater than or equal to the second preset temperature threshold, then control the liquid cooling fan to switch to the pump circulation mode.

4. The method according to claim 3, characterized in that, The method further includes: The current operating mode is either shutdown mode or pump circulation mode. If the second temperature difference is less than the first preset temperature threshold and greater than the second preset temperature threshold, the liquid cooling fan is controlled to maintain the current operating mode.

5. The method according to claim 1, characterized in that, The method further includes: The current operating mode is either shutdown mode or pump circulation mode. If the maximum cell temperature is greater than or equal to the preset cooling temperature, the liquid cooling fan is controlled to switch to cooling mode.

6. The method according to claim 1, characterized in that, The acquisition of the cell temperature corresponding to each of the multiple energy storage batteries in the energy storage system includes: The battery management system acquires the cell temperature of each of the multiple energy storage batteries in the energy storage system at preset intervals.

7. A speed control device for a liquid-cooled fan, characterized in that, The device includes: The acquisition module is used to acquire the cell temperature of each of the multiple energy storage batteries in the energy storage system. The first determining module is used to determine a first temperature difference between the maximum cell temperature and the preset cooling temperature if the maximum cell temperature of the plurality of energy storage batteries is greater than or equal to the preset cooling temperature. The second determining module is used to determine the target duty cycle corresponding to the liquid-cooled fan based on the first temperature difference and from the pre-stored mapping relationship between temperature difference and duty cycle. The control module is used to control the liquid-cooled fan to operate at the target duty cycle, and to control the speed of the liquid-cooled fan by controlling the duty cycle of the liquid-cooled fan.

8. An electronic device, characterized in that, include: Memory, processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory, causing the processor to perform the method as described in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any one of claims 1-6.

10. A computer program product, characterized in that, Includes a computer program that, when executed by a processor, implements the method described in any one of claims 1-6.

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