Fan control method and device, computer device, and storage medium

Abstract

The present invention provides a method and apparatus for controlling a fan, a computer device, and a storage medium. **Solution**: The method is applied to an energy storage system including a battery pack, a fan, and a temperature detection means. The fan cools down the battery pack, and the temperature detection means detects the ambient temperature and the temperature of the battery pack. The method includes the steps of obtaining the ambient temperature and the charge-discharge rate of the battery pack, determining a first temperature range [T1, T2] of the battery pack based on the ambient temperature, and in the first temperature range [T1, T2], the fan is operated according to a linear rule for a duty ratio of 0 to A% according to the charge-discharge rate of the battery pack, and 0

Description

Technical Field

[0001] (Related Application) This application claims priority based on a Chinese patent application with application number 202211231650.8 filed with the Chinese Patent Office on October 10, 2022, and all the contents of the above application are incorporated herein by reference.

[0002] This application relates to the field of heat dissipation technology of battery packs, for example, a method and device for controlling a fan, a computer device, and a storage medium.

Background Art

[0003] Currently, portable energy storage devices (such as lithium batteries) can no longer meet the demand for natural heat dissipation with the increase in energy density, and it is necessary to install a fan for forced air cooling. The forced air cooling measure by the fan only considers the cell temperature of the energy storage device and does not consider the external environmental temperature. Therefore, while it can improve the heat dissipation capacity to a certain extent, it brings a large amount of noise and deteriorates the user experience.

Summary of the Invention

Problems to be Solved by the Invention

[0004] This application provides a method and device for controlling a fan, a computer device, and a storage medium, which comprehensively consider the external environmental temperature and the temperature of the battery pack, and perform duty ratio control on the fan to achieve sufficient heat dissipation for the battery pack and low-noise control of the fan.

Means for Solving the Problems

[0005] In a first aspect, an embodiment of this application provides a method for controlling a fan. The method is applied to an energy storage system, and the energy storage system includes a battery pack, a fan, and temperature detection means. The fan is configured to cool down the battery pack, and the temperature detection means is configured to detect the environmental temperature and the temperature of the battery pack. The fan control method includes the step of obtaining the ambient temperature and the charge-discharge rate of the battery pack; determining a first temperature range [T1, T2] of the battery pack based on the ambient temperature, wherein in the first temperature range [T1, T2] of the battery pack, the fan is operated according to a linear rule for a duty ratio of 0 to A%, and 0 < A% ≤ 100% is satisfied; the step of obtaining the current temperature of the battery pack; responding to the current temperature of the battery pack being within the first temperature range [T1, T2] of the battery pack, and controlling the fan to be operated at a preset duty ratio based on the linear rule for the duty ratio of 0 to A%.

[0006] In a second aspect, an embodiment of the present application further provides a fan control device, and the device includes: a first acquisition module configured to acquire the ambient temperature and the charge-discharge rate of the battery pack; a first temperature range determination module configured to determine a first temperature range [T1, T2] of the battery pack based on the ambient temperature, wherein in the first temperature range [T1, T2] of the battery pack, the fan is operated according to a linear rule for a duty ratio of 0 to A%, and 0 < A% ≤ 100% is satisfied; a second acquisition module configured to acquire the current temperature of the battery pack; a fan control module configured to control the fan to be operated at a preset duty ratio based on the linear rule for the duty ratio of 0 to A% in response to the current temperature of the battery pack being within the first temperature range [T1, T2] of the battery pack.

[0007] In a third aspect, an embodiment of the present application further provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable by the processor. When the processor runs the program, the fan control method described in the first aspect is implemented.

[0008] In a fourth aspect, an embodiment of the present application further provides a storage medium including computer-executable instructions. When the computer-executable instructions are executed by a computer processor, the fan control method as described in the first aspect is executed.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Modes for Carrying Out the Invention

[0010] Hereinafter, the present application will be further described with reference to the drawings and embodiments. As can be understood, the embodiments described here are only used for explaining the present application. For the convenience of explaining the present application, only the parts related to the present application are shown in the drawings, not all the structures.

[0011] FIG. 1 is a flowchart of a fan control method according to an embodiment of the present application. As shown in FIG. 1, the method may include the following steps S110 to S140.

[0012] In S110, the environmental temperature and the charge / discharge rate of the battery pack are obtained.

[0013] Here, the method is applied to an energy storage system, and the energy storage system includes a battery pack, a fan, and temperature detection means. The fan is configured to cool down the battery pack, and the temperature detection means is configured to detect the ambient temperature and the temperature of the battery pack. The temperature detection means may be a thermistor. In this embodiment, the temperature of the battery pack may be detected by the temperature detection means. It should be noted that during the charging and discharging processes of the battery pack, the temperature distribution of each detection site of the battery pack detected by the temperature detection means is non-uniform. In some embodiments, the temperatures of a plurality of battery packs may be detected, and the maximum value among the temperatures of the plurality of battery packs may be selected as the temperature of the battery pack.

[0014] The charge and discharge rate of the battery pack determines the heat generation amount of the battery pack, and the heat dissipation efficiency of the fan changes according to the change in the heat generation amount of the battery pack. Generally, the higher the charge and discharge rate of the battery pack, the more heat is generated by the battery pack during charging and discharging, and thus the fan needs to have a higher heat dissipation efficiency. The lower the charge and discharge rate of the battery pack, the less heat is generated by the battery pack during charging and discharging, and thus the fan needs to have a lower heat dissipation efficiency. In this embodiment, by obtaining the charge and discharge rate of the battery pack and determining the heat generation amount of the battery pack, the degree of heat dissipation efficiency of the fan is determined.

[0015] In S120, a first temperature range [T1, T2] of the battery pack is determined based on the ambient temperature. Here, within the first temperature range [T1, T2] of the battery pack, the fan is operated according to a linear rule for a duty ratio of 0 to A%, and 0 < A% ≤ 100% is satisfied, according to the charge and discharge rate of the battery pack.

[0016] Here, when the temperature of the battery pack is within the first temperature range [T1, T2] of the battery pack, the fan is controlled to operate according to a linear rule for a duty ratio of 0 to A%, that is, when the temperature of the battery pack is T1, the fan starts, and then as the temperature of the battery pack gradually increases from T1 to T2, the duty ratio of the fan increases linearly. When the temperature of the battery pack is T2, the fan operates at the maximum duty ratio A. As can be understood, the higher the charge and discharge rate of the battery pack, the higher the heat generation amount of the battery pack, the greater the heat dissipation efficiency required for the fan, and thus the larger the maximum duty ratio A set thereby, and the battery pack can be effectively heat-dissipated. That is, the higher the charge and discharge rate of the battery pack, the larger A in the linear rule for the duty ratio of 0 to A% becomes.

[0017] Generally, the fan directly controls its duty ratio based on the temperature [0 to Tmax] of the battery pack to achieve the purpose of heat dissipation for the battery pack. Although the heat dissipation capacity can be improved in this way, relatively more noise is generated at the same time. Since the ambient temperature affects the heat dissipation efficiency of the battery pack, when the rotation speed of the fan is the same, the higher the ambient temperature, the lower the heat dissipation efficiency of the battery pack. Therefore, the duty ratio of the fan needs to comprehensively consider the ambient temperature and the temperature of the battery pack. In this embodiment, different first temperature ranges [T1, T2] of the battery pack are determined based on different ambient temperatures, so that the fan starts when the temperature of the battery pack reaches different T1, the speed of the fan is linearly adjusted within the temperature (T1, T2) of the battery pack, and the speed of the fan is adjusted at the maximum duty ratio when the temperature of the battery pack reaches different T2. In this way, the external ambient temperature and the temperature of the battery pack are comprehensively considered, and the fan is controlled at a preset duty ratio to achieve sufficient heat dissipation for the battery pack. Also, by starting the fan when the temperature of the battery pack reaches different T1 at different ambient temperatures, it is avoided that the fan is always in the starting process, and low-noise control of the fan is also realized.

[0018] In S130, the current temperature of the battery pack is acquired.

[0019] The current temperature of the battery pack may be the temperature of the battery pack with the maximum temperature among the temperatures of a plurality of battery packs detected at a plurality of detection points, and the current temperature of the battery pack is the maximum battery pack temperature during the charging process or the discharging process of the battery.

[0020] In S140, when the current temperature of the battery pack is within the first temperature range [T1, T2] of the battery pack, the fan is controlled to operate at a preset duty ratio based on a linear rule for a duty ratio of 0 to A%.

[0021] Here, when the current temperature of the battery pack is within the first temperature range [T1, T2] of the battery pack, it is controlled so that the fan operates at a preset duty ratio based on a linear rule for a duty ratio of 0 to A%, and sufficient heat dissipation for the battery pack and low-noise control of the fan are realized.

[0022] Preferably, when the current temperature of the battery pack exceeds the second temperature range [T3, T4], the operation of the battery pack is stopped, where the second temperature range [T3, T4] includes the first temperature range [T1, T2] of the battery pack, and the battery pack is safely operated within the second temperature range [T1, T2].

[0023] When the current temperature of the battery pack is within the temperature range (T2, T4], the fan operates at a duty ratio of A%.

[0024] When the current temperature of the battery pack is greater than T4, it is determined whether a charging signal is detected. When a charging signal is detected, the fan is controlled to operate at a duty ratio of B%, and 0 < B% ≤ 100% is satisfied.

[0025] Here, during the operation of the battery pack, if the current temperature of the battery pack exceeds the second temperature range [T3, T4], the operation of the battery pack can be stopped, over-temperature protection for the battery pack can be achieved, and the occurrence of an explosion of the battery pack can be avoided. After the battery pack stops operating, that is, after over-temperature heat preservation, if a charging signal is detected, the fan is controlled to operate at a duty ratio of B%, and thus the temperature drop can be accelerated. In one embodiment, when a charging signal is detected, by controlling the fan to operate at a duty ratio of 50%, the temperature drop can be accelerated, and the charging speed of the subsequent battery pack can be improved.

[0026] Preferably, based on the above embodiment, it will be described how to determine the first temperature range [T1, T2] of the battery pack based on the ambient temperature. FIG. 2 is a flowchart of another fan control method according to an embodiment of the present application. As shown in FIG. 2, the method includes the following steps S210 to S250.

[0027] In S210, the ambient temperature and the charge-discharge rate of the battery pack are obtained.

[0028] In S220, it is divided into a plurality of temperature levels having a predetermined temperature range, and the temperature level of the ambient temperature is determined.

[0029] According to the heat dissipation efficiency of the battery pack, it is divided into a plurality of temperature levels having a predetermined temperature range (for example, the temperature levels can be represented by Roman numerals, and the temperature levels can include Class I, Class II, Class III...). That is, at different temperature levels, the heat dissipation efficiency of the battery pack is different. Generally, in the case of heat dissipation without a fan or when the rotation speed of the fan is the same, the higher the temperature level, the lower the heat dissipation efficiency of the battery pack. When the temperature level reaches a preset temperature level, the heat dissipation efficiency of the battery pack is the lowest. In order to achieve effective heat dissipation for the battery pack, in the case where the temperature level is higher, the heat dissipation efficiency of the battery pack becomes lower, and thus the fan needs to have a high heat dissipation efficiency.

[0030] In one embodiment, the preset temperature level may be one of the temperature levels having the plurality of predetermined temperature intervals.

[0031] In S230, based on the temperature level, the interval value T1 at the left end of the first temperature interval [T1, T2] of the battery pack is determined, and based on the second temperature interval [T3, T4], the interval value T2 at the right end of the first temperature interval [T1, T2] of the battery pack is determined. Here, within the first temperature interval [T1, T2] of the battery pack, the fan is operated according to a linear rule for a duty ratio of 0 to A%, and 0 < A% ≤ 100% is satisfied.

[0032] In the actual fan control process, the interval value T2 at the right end of the first temperature interval [T1, T2] of the battery pack only needs to satisfy being smaller than the interval value T4 at the right end in the first temperature interval [T3, T4]. The interval value T2 at the right end of the first temperature interval [T1, T2] of the battery pack determines the end time of the fan control. Generally, at different environmental temperature levels, the interval value T2 at the right end of the first temperature interval [T1, T2] of the battery pack is constant, that is, at different environmental temperature levels, the end time of the fan control is approximately the same. The magnitude of the interval value T1 at the left end of the first temperature interval [T1, T2] of the battery pack determines the start time of the fan. When the start end time of the fan is constant, the earlier the start time of the fan, the relatively longer the start time of the fan, thereby increasing the heat dissipation efficiency of the fan. The relatively shorter the start time of the fan, the lower the heat dissipation efficiency of the fan.

[0033] The higher the temperature level, the lower the heat dissipation efficiency of the battery pack, which in turn increases the required heat dissipation efficiency of the fan. Exemplarily, in this embodiment, when a certain temperature level of the ambient temperature is below a preset temperature level, the higher the temperature level, the lower the interval value T1 at the left end of the first temperature interval [T1, T2] of the battery pack, and the longer the startup time of the fan, which in turn increases the heat dissipation efficiency of the fan. When a certain temperature level of the ambient temperature is above the preset temperature level, since the temperature level of the ambient temperature has reached the preset temperature level, the heat dissipation efficiency of the battery pack is the lowest. Compared with extending the startup time of the fan to improve the heat dissipation efficiency of the fan, the temperature change rate of the duty ratio of the fan has a greater impact on the heat dissipation efficiency of the fan. When the temperature level of the ambient temperature is greater than the preset temperature level, the interval value T1 at the left end of the first temperature interval [T1, T2] of the battery pack is adjusted so that the temperature change rate of the duty ratio of the fan of the battery pack is greater than the temperature change rate of the duty ratio of the fan determined at the temperature level before the preset temperature level, thereby realizing sufficient heat dissipation for the battery pack. Here, the temperature change rate of the duty ratio of the fan of the battery pack is the ratio of A% to the difference between (T1 - T2) in the first temperature interval [T1, T2] of the battery pack. Also, at each temperature level, in order to start the fan when the temperature of the battery pack reaches different T1, it is avoided that the fan is always in the startup process at each temperature level, and low-noise control of the fan is realized.

[0034] Note that the operation process of the battery pack includes the charging process and the discharging process of the battery pack. In this embodiment, after obtaining the environmental temperature and the charge-discharge rate of the battery pack, preferably, it further includes determining the charge-discharge state of the battery pack. When the battery pack is in the charging state, a first temperature range of the first type of battery pack is determined based on the environmental temperature. Here, in the first temperature range of the first type of battery pack, according to the charging efficiency of the battery pack, the fan is operated according to a linear rule for a duty ratio of 0 to A%, where A% satisfies 0 < A% ≤ 100%. When the battery pack is in the discharging state, a first temperature range of the second type of battery pack is determined based on the environmental temperature. Here, in the first temperature range of the second type of battery pack, according to the discharging efficiency of the battery pack, the fan is operated according to a linear rule for a duty ratio of 0 to A%, where A% satisfies 0 < A% ≤ 100%.

[0035] The following table respectively shows the adjustment of the fan duty ratio in the charging process and the discharging process of the battery pack.

[0036] (Table 1) Control of the fan duty ratio in the charging process of the battery pack TIFF2025522128000002.tif50135

[0037] The following content can be understood from Table 1. When the battery pack is in a charged state, different first temperature ranges of the first type of battery pack are determined based on different ambient temperatures. When the temperature level where the ambient temperature is located is below the preset temperature level, exemplarily, taking the preset temperature level as Class III, when the temperature level is in Class I [0°C, 10°C), Class II [10°C, 25°C), or Class III [25°C, 35°C), the left interval value of the first temperature range of the first type of battery pack is related to the temperature level. As the temperature level rises, the left interval value T1 of the first temperature range [T1, T2] of the battery pack becomes lower. When the temperature level is greater than the preset temperature level, exemplarily, still taking the preset temperature level as Class III, when the temperature level is in Class IV [35°C, 50°C], the temperature change rate of the fan duty ratio at this temperature level (for example, A% / 10 in Table 1) is made larger than the temperature change rate of the fan duty ratio determined at the previous temperature level [25°C, 35°C] of the preset temperature level (for example, A% / 17 in Table 1), and the left interval value T1 of the first temperature range [T1, T2] of the battery pack is adjusted. Thereby, effective heat dissipation in the charging process of the battery pack can be achieved.

[0038] (Table 2) Control of the fan duty ratio in the discharging process of the battery pack TIFF2025522128000003.tif49130

[0039] The following content can be understood from Table 2. When the battery pack is in a discharged state, different first temperature ranges of the second type of battery pack are determined based on different ambient temperatures. When the temperature level where the ambient temperature is located is below the preset temperature level, exemplarily, taking the preset temperature level as Class IV, when the temperature levels are in Class I [-10°C, 0°C), Class II [0°C, 15°C), Class III [15°C, 30°C), and Class IV [30°C, 40°C), the left-end interval value of the first temperature range of the second type of battery pack is related to the temperature level. As the temperature level rises, the left-end interval value T1 of the first temperature range [T1, T2] of the battery pack becomes lower. When the temperature level is greater than the preset temperature level, exemplarily, still taking the preset temperature level as Class IV, when the temperature level is in Class V [40°C, 60°C], the temperature change rate of the fan duty ratio at this temperature level [35°C to 50°C] (for example, A% / 5 in Table 2) is made greater than the temperature change rate of the fan duty ratio determined at the previous temperature level of this temperature level, Class IV [30°C, 40°C] (for example, A% / 20 in Table 2), and the left-end interval value T1 of the first temperature range [T1, T2] of the battery pack is adjusted. Thereby, effective heat dissipation in the discharging process of the battery pack can be achieved.

[0040] In S240, the current temperature of the battery pack is acquired.

[0041] In S250, when the current temperature of the battery pack is within the first temperature range [T1, T2] of the battery pack, the fan is controlled to operate at a preset duty ratio based on a linear rule for a duty ratio of 0 to A%.

[0042] Based on the above technical solution, in the operation process of the battery pack, the interval value T1 at the left end of the first temperature interval [T1, T2] of the battery pack is determined based on the temperature level, and the interval value T2 at the right end of the first temperature interval [T1, T2] of the battery pack is determined based on the second temperature interval [T3, T4]. Thereby, different first temperature intervals [T1, T2] of different battery packs are determined based on different ambient temperatures. When the temperature of the battery pack reaches different T1, the fan is started. The speed of the fan is linearly adjusted within the temperature T1~T2 of the battery pack. When the temperature of the battery pack reaches different T2, the speed of the fan is adjusted at the maximum duty ratio. Thereby, the external environmental temperature and the temperature of the battery pack are comprehensively considered, the fan is controlled with a preset duty ratio, and sufficient heat dissipation for the battery pack and low-noise control of the fan can be realized.

[0043] Note that the operation process of the battery pack includes the charging process of the battery pack and the discharging process of the battery pack. The second temperature interval [T3, T4] includes the first temperature interval of the first type and the second temperature interval of the second type. Preferably, when the current temperature of the battery pack exceeds the second temperature interval of the first type or the second temperature interval of the second type, the battery pack stops operating. Here, the second temperature interval of the first type includes the first temperature interval of the first type of battery pack, and the battery pack is safely charged within the second temperature interval of the first type. The second temperature interval of the second type includes the first temperature interval of the second type of battery pack, and the battery pack is safely discharged within the second temperature interval of the second type.

[0044] Here, continue to refer to Table 1. When the battery pack is in the charging process and the current temperature of the battery pack exceeds the second temperature interval [0°C, 50°C] of the first type, the operation of the battery pack stops, reaching over-temperature protection in the charging process of the battery pack, that is, the charging safety temperature range of the battery pack is [0°C, 50°C]. Continue to refer to Table 2. When the battery pack is in the discharging process and the current temperature of the battery pack exceeds the second temperature interval [-10°C, 60°C] of the second type, the operation of the battery pack stops, achieving over-temperature protection in the discharging process of the battery pack, that is, the discharging safety temperature range of the battery pack is [-10°C, 60°C].

[0045] Embodiments of the present application further provide a fan control device. The fan control device according to the embodiments of the present application can execute the fan control method according to any embodiment of the present application, and includes a functional module corresponding to the execution method and beneficial effects. FIG. 3 is a schematic structural diagram of a fan control device according to an embodiment of the present application. As shown in FIG. 3, the device includes a first acquisition module 10 configured to acquire the ambient temperature and the charge-discharge rate of the battery pack, a first temperature interval determination module 20 configured to determine a first temperature interval [T1, T2] of the battery pack based on the ambient temperature, where in the first temperature interval [T1, T2] of the battery pack, the fan is operated according to a linear rule for a duty ratio of 0 to A%, and 0 < A% ≤ 100% is satisfied, a second acquisition module 30 configured to acquire the current temperature of the battery pack, and a fan control module 40 configured to control the fan to operate at a preset duty ratio based on a linear rule for a duty ratio of 0 to A% in response to the current temperature of the battery pack being within the first temperature interval [T1, T2] of the battery pack.

[0046] Preferably, the device further includes an operation stop module configured to stop the operation of the battery pack when the current temperature of the battery pack exceeds a second temperature interval [T3, T4], where the second temperature interval [T3, T4] includes the first temperature interval [T1, T2] of the battery pack, and the battery pack is safely operated within the second temperature interval [T1, T2], and a first preset duty ratio operation module configured to configure the fan to operate at a duty ratio of A% when the current temperature of the battery pack is within the temperature interval (T2, T4].

[0047] Preferably, the device further includes a first determination module configured to determine whether a charging signal is detected when the current temperature of the battery pack is greater than T4, When a charging signal is detected, it further includes a second preset duty ratio operation module configured to control the fan to operate at a duty ratio of B% and satisfy 0 < B% ≤ 100%.

[0048] Preferably, the device further includes a second determination module configured to divide into a plurality of temperature levels having a predetermined temperature range and determine a certain temperature level of the ambient temperature. The first temperature range determination module 20 includes a left range determination means configured to determine the left range value T1 of the first temperature range [T1, T2] of the battery pack based on the temperature level, a right range determination means configured to determine the right range value T2 of the first temperature range [T1, T2] of the battery pack based on the second temperature range [T3, T4], and a first temperature range determination means configured to determine the first temperature range [T1, T2] of the battery pack based on the left range value T1 and the right range value T2.

[0049] Preferably, the temperature change rate of the duty ratio of the fan is the ratio of the duty ratio of A% to the temperature range (T2 - T1) of the first temperature range [T1, T2] of the battery pack.

[0050] Preferably, the left range determination means is configured to determine the left range value T1 of the first temperature range [T1, T2] of the battery pack based on the temperature level by the following method: When the temperature level is below the preset temperature level, the higher the temperature level, the lower the left range value T1 of the first temperature range [T1, T2] of the battery pack, where the heat dissipation efficiency of the battery pack at the preset temperature level is the lowest. When the temperature level is greater than the preset temperature level, the left range value T1 of the first temperature range [T1, T2] of the battery pack is adjusted so that the temperature change rate of the duty ratio of the fan is greater than the temperature change rate of the duty ratio of the fan determined at the temperature level before the preset temperature level.

[0051] Preferably, the second preset duty ratio operation module is configured to control the fan to operate at a duty ratio of B% by the following method: Control the fan to operate at a duty ratio of 50%.

[0052] Preferably, according to the charge and discharge rate of the battery pack, the fan is operated according to a 0~A% duty cycle linear rule. Specifically, The higher the charge and discharge rate of the battery pack, the larger A is in the linear rule for the 0~A% duty ratio.

[0053] Preferably, the device Further includes a third determination module configured to determine the charge and discharge state of the battery pack, The first temperature range determination module 20 When the battery pack is in a charged state, it is configured to determine the first temperature range of the first type of battery pack based on the ambient temperature. Here, in the first temperature range of the first type of battery pack, the fan is operated according to a linear rule for the 0~A% duty ratio according to the charging efficiency of the battery pack, and a first determination means satisfying 0<A%≦100%; When the battery pack is in a discharged state, it is configured to determine the first temperature range of the second type of battery pack based on the ambient temperature. Here, in the first temperature range of the second type of battery pack, the fan is operated according to a linear rule for the 0~A% duty ratio according to the discharge efficiency of the battery pack, and includes a second determination means satisfying 0<A%≦100%.

[0054] Preferably, the second temperature range [T3, T4] includes the second temperature range of the first type and the second temperature range of the second type. The operation stop module When the current temperature of the battery pack exceeds the second temperature range of the first type or the second temperature range of the second type, the operation of the battery pack is configured to stop, where the second temperature range of the first type includes the first temperature range of the first type of battery pack, the battery pack is safely charged within the second temperature range of the first type, the second temperature range of the second type includes the first temperature range of the second type of battery pack, and the battery pack includes operation stopping means that is safely discharged within the second temperature range of the second type.

[0055] Figure 4 is a schematic structural diagram of a computer device according to an embodiment of the present application. As shown in Figure 4, the device includes a processor 70, a memory 71, an input device 72, and an output device 73. The number of processors 70 in the device may be one or more. In Figure 4, one processor 70 is taken as an example. The processor 70, memory 71, input device 72, and output device 73 in the device may be connected by a bus or other means. In Figure 4, it is taken as an example that they are connected by a bus.

[0056] The memory 71 is used as a computer-readable storage medium for software programs, computer-executable programs, and modules. For example, it is used to store program instructions / modules corresponding to the fan control method in the embodiments of the present application (for example, the first acquisition module 10, the first temperature range determination module 20, the second acquisition module 30, and the fan control module 40 in the fan control device). The processor 70 executes various functional applications and data processing of the device by operating the software programs, instructions, and modules stored in the memory 71, that is, realizes the above fan control method.

[0057] The memory 71 may mainly include a program storage area and a data storage area. Here, the program storage area can store an operating system and application programs required for at least one function, and the data storage area can store data created according to the use of the terminal. Also, the memory 71 may include a high-speed random access memory, and may also include, for example, at least one non-volatile memory such as a disk storage device, a flash memory device, or other non-volatile solid-state storage devices. In some embodiments, the memory 71 may include a memory installed remotely from the processor 70, and these remote memories may be connected to the device via a network. Examples of the above network include the Internet, intranet, local area network, mobile communication network, and combinations thereof.

[0058] The input device 72 is used to receive the input numerical or character information and generate key signal inputs related to the user installation and function control of the device. The output device 73 may include a display device such as a display panel.

[0059] The embodiments of the present application further provide a storage medium including computer-executable instructions for executing a fan control method when executed by a computer processor. The method includes: acquiring the ambient temperature and the charge-discharge rate of the battery pack; determining a first temperature range [T1, T2] of the battery pack based on the ambient temperature, where in the first temperature range [T1, T2] of the battery pack, the fan is operated according to a linear rule for a duty ratio of 0 to A%, and 0 < A% ≤ 100% is satisfied; acquiring the current temperature of the battery pack; When the current temperature of the battery pack is within the first temperature range [T1, T2] of the battery pack, controlling the fan to operate at a preset duty ratio based on the linear rule for the duty ratio of 0 to A%.

[0060] Of course, the storage medium containing computer-executable instructions according to the embodiments of the present application is not limited to the computer-executable instructions being limited to the method operations as described above, and may also execute related operations in the fan control method according to any embodiment of the present application.

[0061] From the description of the above embodiments, those skilled in the art can clearly understand that the present application may be implemented by software and necessary general-purpose hardware, and of course, it may also be implemented by hardware. However, in many cases, the former is a more preferred embodiment. Based on such an understanding, the technical solution of the present application may essentially or the part that contributes to the prior art may be embodied in the form of a software product. The computer software product may be stored in a computer-readable storage medium such as a floppy disk, read-only memory (ROM), random access memory (RAM), flash memory (FLASH), hard disk, or optical disk of a computer. It includes at least one instruction for a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the embodiments of the present application.

[0062] It should be noted that in the embodiments of the above device, each means and module included are only partitioned according to functional logic, but are not limited to the above partitioning, as long as the corresponding functions can be realized. Also, the names of the functional means are only for easy distinction from each other.

Claims

1. A fan control method applied to an energy storage system, wherein the energy storage system includes a battery pack, a fan, and temperature detection means, the fan is configured to cool down the battery pack, and the temperature detection means is configured to detect the ambient temperature and the temperature of the battery pack, The fan control method includes: obtaining the ambient temperature and the charge-discharge rate of the battery pack; determining a first temperature range [T1, T2] of the battery pack based on the ambient temperature, wherein in the first temperature range [T1, T2] of the battery pack, the fan is operated according to a linear rule for a duty ratio of 0 to A%, and 0 < A% ≤ 100% is satisfied; obtaining the current temperature of the battery pack; responding to the current temperature of the battery pack being within the first temperature range [T1, T2] of the battery pack, controlling the fan to be operated at a preset duty ratio based on the linear rule for the duty ratio of 0 to A%.

2. The fan control method further includes: responding to the current temperature of the battery pack exceeding a second temperature range [T3, T4], stopping the operation of the battery pack, where the second temperature range [T3, T4] includes the first temperature range [T1, T2] of the battery pack, and the battery pack is safely operated within the second temperature range [T3, T4]; responding to the current temperature of the battery pack being within the temperature range (T2, T4], operating the fan at a duty ratio of A%.

3. The fan control method further includes: responding to the current temperature of the battery pack being greater than T4, determining whether a charging signal is detected; responding to the charging signal being detected, controlling the fan to be operated at a duty ratio of B%, and 0 < B% ≤ 100% is satisfied.

4. The fan control method further includes: dividing into a plurality of temperature levels having a predetermined temperature range, and determining the temperature level where the ambient temperature is located. The step of determining the first temperature range [T1, T2] of the battery pack based on the ambient temperature includes: determining the interval value T1 at the left end of the first temperature range [T1, T2] of the battery pack based on the temperature level; determining the interval value T2 at the right end of the first temperature range [T1, T2] of the battery pack based on the second temperature range [T3, T4]; The fan control method according to claim 2, characterized by further including determining the first temperature range [T1, T2] of the battery pack based on the interval value T1 at the left end and the interval value T2 at the right end.

5. Determining the interval value T1 at the left end of the first temperature range [T1, T2] of the battery pack based on the temperature level includes: when the temperature level is below a preset temperature level, the higher the temperature level, the lower the interval value T1 at the left end of the first temperature range [T1, T2] of the battery pack, where the heat dissipation efficiency of the battery pack at the preset temperature level is the lowest; when the temperature level is greater than the preset temperature level, adjusting the interval value T1 at the left end of the first temperature range [T1, T2] of the battery pack so that the temperature change rate of the duty ratio of the fan when the battery pack is at the temperature level is greater than the temperature change rate of the duty ratio of the fan determined at the previous temperature level of the temperature level. The fan control method according to claim 4 is characterized by including this.

6. The temperature change rate of the duty ratio of the fan is the ratio of the duty ratio of A% to the temperature range (T2 - T1) of the first temperature range [T1, T2] of the battery pack. The fan control method according to claim 5 is characterized by this.

7. The step of controlling the fan to operate at a duty ratio of B% includes: The fan control method according to claim 3, characterized by including controlling the fan to operate at a duty ratio of 50%.

8. The step of operating the fan according to a linear rule for a duty ratio of 0 to A% according to the charge and discharge rate of the battery pack includes: The higher the charge and discharge rate of the battery pack, the greater the A in the linear rule for the duty ratio of 0 to A%. The fan control method according to claim 1 is characterized by including this.

9. The fan control method further includes: a step of determining the charge and discharge state of the battery pack. The step of determining the first temperature range [T1, T2] of the battery pack based on the ambient temperature is as follows: In response to the battery pack being in a charged state, determine the first temperature range [T1, T2] of the first type of battery pack based on the ambient temperature. Here, in the first temperature range of the first type of battery pack, the fan is operated according to a linear rule for a duty ratio of 0 to A%, and 0 < A% ≤ 100% is satisfied, and In response to the battery pack being in a discharged state, determine the first temperature range [T1, T2] of the second type of battery pack based on the ambient temperature. Here, in the first temperature range of the second type of battery pack, the fan is operated according to a linear rule for a duty ratio of 0 to A%, and 0 < A% ≤ 100% is satisfied. The fan control method according to claim 2 is characterized by including the above.

10. The second temperature range [T3, T4] includes the second temperature range of the first type and the second temperature range of the second type. The step of stopping the operation of the battery pack in response to the current temperature of the battery pack exceeding the second temperature range [T3, T4] is as follows: In response to the current temperature of the battery pack exceeding the second temperature range of the first type or the second temperature range of the second type, stop the operation of the battery pack. Here, the second temperature range of the first type includes the first temperature range of the first type of battery pack, and the battery pack is safely charged within the second temperature range of the first type. The second temperature range of the second type includes the first temperature range of the second type of battery pack, and the battery pack is safely discharged within the second temperature range of the second type. The fan control method according to claim 9 is characterized by including the above.

11. A fan control device, A first acquisition module configured to acquire the ambient temperature and the charge / discharge rate of the battery pack; A first temperature range determination module configured to determine the first temperature range [T1, T2] of the battery pack based on the ambient temperature. Here, in the first temperature range [T1, T2] of the battery pack, the fan is operated according to a linear rule for a duty ratio of 0 to A%, and 0 < A% ≤ 100% is satisfied; A second acquisition module configured to acquire the current temperature of the battery pack; A fan control module configured to control the fan to operate at a preset duty ratio based on a linear rule for the 0 to A% duty ratio in response to the current temperature of the battery pack being within the first temperature range [T1, T2] of the battery pack. A fan control device characterized by including the same.

12. A computer device, including a memory, a processor, and a computer program stored in the memory and executable by the processor, A computer device characterized in that when the processor executes the computer program, the fan control method according to any one of Claims 1 to 10 is implemented.

13. A storage medium including computer-executable instructions, characterized in that when the computer-executable instructions are executed by a processor of a computer, the fan control method according to any one of Claims 1 to 10 is implemented. A storage medium including computer-executable instructions.

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