A method, device and storage medium for controlling a fan of a battery module of an energy storage system

Abstract

A kind of energy storage system battery module fan control method, device, equipment and storage medium, the method includes: obtaining the temperature of each battery module internal electric core;According to the temperature of electric core, the temperature data of corresponding battery module is obtained, the temperature data of battery module includes, module maximum temperature, module minimum temperature, module average temperature;According to the temperature data of battery module, the temperature data of corresponding battery stack is obtained, the temperature data of battery stack includes, the highest temperature in stack, the lowest temperature in stack, the maximum temperature difference in stack, stack average temperature;According to the temperature data of battery module and / or the temperature data of battery stack, the running duty cycle of battery module fan is adjusted.The energy storage system battery module fan control method provided in the application, by adjusting the running duty cycle of battery module fan according to the temperature data of battery module and / or the temperature data of battery stack, the internal temperature difference of battery stack is quickly controlled, the consistency of the electric core in battery stack is increased, and the cycle service life of energy storage system is improved.

Description

Technical Field

[0001] This invention belongs to the field of energy storage technology, specifically relating to a fan control method, device, equipment, and storage medium for a battery module in an energy storage system. Background Technology

[0002] Energy storage technology, as a crucial component of smart grids and a supporting technology, integrates numerous battery cells. In energy storage systems where cells are the basic unit, the temperature difference between the internal cells significantly impacts system lifespan, state of equilibrium (SOH), and overall system balance. To reduce internal cell temperature differences, increase cell consistency, and extend system lifespan, fans are typically added to the battery modules within the energy storage system for speed regulation. Currently, fan speed regulation strategies for energy storage systems rely solely on zoned control based on the average temperature of the battery modules themselves. This method suffers from insufficient temperature response, especially during long-term high-rate operation where significant temperature differences can arise. With hundreds of battery modules within a single stack, the temperature difference between cells increases rapidly with increasing system operating rates, affecting cell consistency and reducing the system's cycle life. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a fan control method for battery modules of an energy storage system, a fan control device for battery modules of an energy storage system, a fan control equipment for battery modules of an energy storage system, and a storage medium for fan control of battery modules of an energy storage system, which is to address the problem that the existing fan speed control strategy of the above-mentioned energy storage system only relies on the average temperature of the battery module itself to control the speed in different zones and cannot quickly control the temperature difference inside the battery stack.

[0004] In a first aspect, the present invention provides a fan control method for a battery module of an energy storage system, comprising the following steps:

[0005] Obtain the cell temperature inside each battery module;

[0006] The temperature data of the corresponding battery module is calculated based on the cell temperature. The temperature data of the battery module includes the module's highest temperature, the module's lowest temperature, and the module's average temperature.

[0007] The temperature data of the corresponding battery stack is calculated based on the temperature data of the battery module. The temperature data of the battery stack includes the highest temperature inside the stack, the lowest temperature inside the stack, the maximum temperature difference inside the stack, and the average temperature of the stack.

[0008] Adjust the operating duty cycle of the battery module fan based on the temperature data of the battery module and / or the temperature data of the battery stack.

[0009] As a further improvement of the present invention, the step of adjusting the operating duty cycle of the battery module fan according to the temperature data of the battery stack includes:

[0010] If the maximum temperature difference within the stack is less than the first threshold, the operating duty cycle of the battery module fan is adjusted in the first operating mode.

[0011] If the maximum temperature difference within the stack is not lower than the first threshold, the operating duty cycle of the battery module fan is adjusted in the second operating mode.

[0012] As a further improvement of the present invention, adjusting the operating duty cycle of the battery module fan in the first operating mode includes adjusting the operating duty cycle of the battery module fan according to the highest temperature of the module or the average temperature of the module.

[0013] If the maximum temperature difference within the stack is less than the first threshold and the highest temperature of the module is greater than the second threshold, the operating duty cycle of the battery module fan is adjusted according to the highest temperature of the module.

[0014] If the maximum temperature difference within the stack is less than the first threshold and the highest temperature of the module is not higher than the second threshold, the operating duty cycle of the battery module fan is adjusted according to the average temperature of the module.

[0015] As a further improvement of the present invention, the adjustment of the operating duty cycle of the battery module fan in the first operating mode further includes:

[0016] If the highest temperature of the module is greater than the second threshold or the average temperature of the module is not lower than the third threshold, then the operating duty cycle of the corresponding battery module fan will be adjusted to the first duty cycle.

[0017] If the average temperature of the module is less than the third threshold and the average temperature of the module is not lower than the fourth threshold, then the operating duty cycle of the corresponding battery module fan will be adjusted to the second duty cycle.

[0018] If the average temperature of the module is less than the fourth threshold and the average temperature of the module is not lower than the fifth threshold, then the operating duty cycle of the corresponding battery module fan will be adjusted to the third duty cycle.

[0019] If the average temperature of the module is less than the fifth threshold and the average temperature of the module is not lower than the sixth threshold, then the operating duty cycle of the corresponding battery module fan will be adjusted to the fourth duty cycle.

[0020] If the average temperature of the module is less than the sixth threshold, the operating duty cycle of the corresponding battery module fan will be adjusted to the fifth duty cycle.

[0021] Wherein, the second threshold is greater than the third threshold, the third threshold is greater than the fourth threshold, the fourth threshold is greater than the fifth threshold, and the fifth threshold is greater than the sixth threshold.

[0022] As a further improvement of the present invention, if the maximum temperature difference within the stack is not lower than the first threshold, the battery module fan is controlled to operate in a second operating mode, including the following steps:

[0023] The battery modules are sorted according to their lowest temperature. The top 10% of battery modules with the lowest temperatures are designated as the first module, and the operating duty cycle of the fan corresponding to the first module is adjusted to the sixth duty cycle.

[0024] The battery modules are sorted according to their highest temperature. The top 10% of battery modules with the highest highest temperature are designated as the second module. The operating duty cycle of the fan of the battery module corresponding to the second module is adjusted to the first duty cycle.

[0025] If the highest temperature of the battery module is not lower than the second threshold, the operating duty cycle of the corresponding battery module fan will be adjusted to the first duty cycle.

[0026] As a further improvement of the present invention, if the maximum temperature difference within the stack is not lower than the first threshold, controlling the battery module fan to operate in a second operating mode further includes the following steps:

[0027] The battery module other than the first module and the second module is designated as the third module;

[0028] If the difference between the average temperature of the module and the average temperature of the stack in the third module is less than the seventh threshold, then the battery module fan corresponding to the third module is controlled to operate in the first operating mode.

[0029] As a further improvement of the present invention, if the difference between the average temperature of the module and the average temperature of the stack in the third module is not lower than the seventh threshold, and the average temperature of the module is higher than the average temperature of the stack, then the operating duty cycle of the battery module fan in the third module is adjusted by increasing the duty cycle by a first preset amount based on the adjustment of the operating duty cycle of the battery module fan in the first operating mode.

[0030] If the difference between the average temperature of the module and the average temperature of the stack in the third module is not lower than the seventh threshold, and the average temperature of the module is lower than the average temperature of the stack, then the operating duty cycle of the battery module fan in the third module is adjusted by reducing the duty cycle by a first preset amount based on adjusting the operating duty cycle of the battery module fan in the first operating mode.

[0031] Secondly, the present invention also provides a fan control device for a battery module of an energy storage system, comprising:

[0032] The acquisition module is used to acquire the temperature of the cells inside each battery module;

[0033] The first calculation module is used to calculate the temperature data of the corresponding battery module based on the temperature of the battery cell. The temperature data of the battery module includes the highest temperature of the module, the lowest temperature of the module, and the average temperature of the module.

[0034] The second calculation module is used to calculate the temperature data of the corresponding battery stack based on the temperature data of the battery module. The temperature data of the battery stack includes the highest temperature inside the stack, the lowest temperature inside the stack, the maximum temperature difference inside the stack, and the average temperature of the stack.

[0035] The control module is used to adjust the operating duty cycle of the battery module fan based on the temperature data of the battery module and / or the temperature data of the battery stack.

[0036] Thirdly, the present invention also provides a fan control device for a battery module of an energy storage system, the fan control device comprising: a memory and at least one processor, the memory storing computer execution instructions; the at least one processor calling the computer execution instructions in the memory to cause the fan control device for the battery module of the energy storage system to execute the fan control method for the battery module of the energy storage system described in any of the above embodiments.

[0037] Fourthly, the present invention provides a computer-readable storage medium having computer-executable instructions stored thereon, the computer-executable instructions being executed by a processor of the energy storage system battery module fan control method described in any of the above embodiments.

[0038] The present invention provides a fan control method for battery modules in an energy storage system. By adjusting the operating duty cycle of the battery module fan according to the temperature data of the battery module and / or the temperature data of the battery stack, the temperature difference inside the battery stack can be quickly controlled, the consistency of the cells inside the battery stack can be increased, and the cycle life of the system can be improved.

[0039] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the battery cluster layout within a battery stack of an energy storage system.

[0042] Figure 2 This is a schematic diagram of the battery module layout within a battery cluster of an energy storage system.

[0043] Figure 3 A flowchart of a fan control method for a battery module in an energy storage system provided in an embodiment of the present invention;

[0044] Figure 4 A structural block diagram of a fan control device for a battery module in an energy storage system provided in an embodiment of the present invention;

[0045] Figure 5 This is a schematic diagram of the structure of a fan control device for a battery module in an energy storage system, provided in an embodiment of the present invention.

[0046] The meanings of the labels in the attached diagram are as follows:

[0047] Acquisition module-401; First calculation module-402; Second calculation module-403; Control module-404; Memory-501; Processor-502. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings and specific examples. It should be understood that the embodiments described herein are merely illustrative of the invention and represent only a portion, not all, of the embodiments. That is, the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention. The embodiments cover features of multiple specific embodiments and the methods, steps, and their order for constructing and operating these specific embodiments. However, other specific embodiments can also be used to achieve the same or equivalent functions and step sequences. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0049] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.

[0050] In the description of the embodiments of the present invention, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The word "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more. Other quantifiers should be understood similarly. The preferred embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention. Furthermore, the embodiments and features in the embodiments of this application can be combined with each other without conflict.

[0051] Currently, the fan speed control strategy for energy storage systems is based on the average temperature of the battery modules themselves, which is used for zoned control. This temperature control method has the problem of insufficient temperature adjustment response. In particular, when the energy storage system is running at high rates for a long time, large temperature differences can easily occur. When a battery stack contains hundreds of battery modules, the temperature difference between the cells will also increase rapidly as the system operating rate increases, thereby affecting the consistency of the cells within the energy storage system and reducing the cycle life of the energy storage system.

[0052] To address the problem that existing energy storage system fan speed control strategies rely solely on the average temperature of the battery module for zoned speed control, failing to quickly manage internal temperature differences and resulting in poor cell consistency and reduced cycle life of the energy storage system, this invention provides a battery module fan control method for energy storage systems. Figure 3 A flowchart of a fan control method for a battery module in an energy storage system provided by an embodiment of the present invention is shown below. Figure 3 As shown in the figure, this embodiment provides a fan control method for a battery module in an energy storage system, which includes the following steps:

[0053] S1. Obtain the cell temperature inside each battery module.

[0054] It should be noted that, as Figure 1 and Figure 2 As shown, the internal structure of an energy storage system consists of multiple battery stacks, each battery stack consists of multiple battery clusters, each battery cluster consists of multiple battery modules, and each battery module consists of multiple cells connected in series and parallel. Therefore, the basic unit of an energy storage system is the battery cell. Thus, the energy storage system battery module fan control method provided in this embodiment of the invention, used to control the temperature difference inside the battery stack of the energy storage system, is actually based on the temperature of the battery cells inside the energy storage system. To control the temperature difference between the battery cells inside the energy storage system and increase the consistency of the battery cells inside the battery stack, the goal is to improve the cycle life of the energy storage system.

[0055] S2. Calculate the temperature data of the corresponding battery module based on the cell temperature. The temperature data of the battery module includes the highest temperature of the module, the lowest temperature of the module, and the average temperature of the module.

[0056] Specifically, the highest cell temperature in the current battery module is taken as the highest temperature of the module, and the lowest cell temperature in the current battery module is taken as the lowest temperature of the module. The average temperature of the module is obtained by averaging the temperatures of all cells in the current battery module.

[0057] S3. Calculate the temperature data of the corresponding battery stack based on the temperature data of the battery module. The temperature data of the battery stack includes the highest temperature inside the stack, the lowest temperature inside the stack, the maximum temperature difference inside the stack, and the average temperature of the stack.

[0058] Specifically, the maximum value among all module maximum temperatures is taken as the stack maximum temperature, and the minimum value among all module minimum temperatures is taken as the stack minimum temperature. The difference between the stack maximum temperature and the stack minimum temperature is taken as the maximum temperature difference within the stack, and the average value of all cell temperatures in the energy storage system is taken as the stack average temperature.

[0059] S4. Adjust the operating duty cycle of the battery module fan according to the temperature data of the battery module and / or the temperature data of the battery stack.

[0060] As a further improvement to this embodiment of the invention, step S4 includes:

[0061] S401. If the maximum temperature difference within the stack is less than the first threshold, the operating duty cycle of the battery module fan is adjusted in the first operating mode.

[0062] Specifically, adjusting the operating duty cycle of the battery module fan in the first operating mode includes adjusting the operating duty cycle of the battery module fan according to the highest temperature of the module or the average temperature of the module.

[0063] Preferably, if the maximum temperature difference within the stack is less than a first threshold and the highest temperature of the module is greater than a second threshold, the operating duty cycle of the battery module fan is adjusted according to the highest temperature of the module; if the maximum temperature difference within the stack is less than the first threshold and the highest temperature of the module is not higher than the second threshold, the operating duty cycle of the battery module fan is adjusted according to the average temperature of the module.

[0064] Specifically, in this embodiment of the invention, the first threshold is preferably 5°C, and the second threshold is preferably 38°C. That is, if the maximum temperature difference within the stack is less than 5°C, the duty cycle of the battery module fan is adjusted in the first operating mode.

[0065] Preferably, if the maximum temperature difference within the stack is less than 5°C and the highest temperature of the module is greater than 38°C, the operating duty cycle of the battery module fan is adjusted according to the highest temperature of the module; if the maximum temperature difference within the stack is less than 5°C and the highest temperature of the module is not higher than 38°C, the operating duty cycle of the battery module fan is adjusted according to the average temperature of the module.

[0066] As a further improvement to this embodiment of the invention, the adjustment of the operating duty cycle of the battery module fan in the first operating mode further includes:

[0067] If the highest temperature of the module is greater than the second threshold or the average temperature of the module is not lower than the third threshold, then the operating duty cycle of the corresponding battery module fan will be adjusted to the first duty cycle.

[0068] If the average temperature of the module is less than the third threshold and the average temperature of the module is not lower than the fourth threshold, then the operating duty cycle of the corresponding battery module fan will be adjusted to the second duty cycle.

[0069] If the average temperature of the module is less than the fourth threshold and the average temperature of the module is not lower than the fifth threshold, then the operating duty cycle of the corresponding battery module fan will be adjusted to the third duty cycle.

[0070] If the average temperature of the module is less than the fifth threshold and the average temperature of the module is not lower than the sixth threshold, then the operating duty cycle of the corresponding battery module fan will be adjusted to the fourth duty cycle.

[0071] If the average temperature of the module is less than the sixth threshold, the operating duty cycle of the corresponding battery module fan will be adjusted to the fifth duty cycle.

[0072] Wherein, the second threshold is greater than the third threshold, the third threshold is greater than the fourth threshold, the fourth threshold is greater than the fifth threshold, and the fifth threshold is greater than the sixth threshold.

[0073] Specifically, in the embodiments of the present invention, the third threshold is preferably 35°C, the fourth threshold is preferably 32°C, the fifth threshold is preferably 29°C, the sixth threshold is preferably 26°C, the first duty cycle is preferably 100%, the second duty cycle is preferably 75%, the third duty cycle is preferably 50%, the fourth duty cycle is preferably 25%, and the fifth duty cycle is preferably 5%.

[0074] That is, if the highest temperature of the module is greater than 38°C or the average temperature of the module is not lower than 35°C, the duty cycle of the corresponding battery module fan will be adjusted to 100%.

[0075] If the average temperature of the module is less than 35°C and not less than 32°C, then the operating duty cycle of the corresponding battery module fan will be adjusted to 75%.

[0076] If the average temperature of the module is less than 32°C and not less than 29°C, then the operating duty cycle of the corresponding battery module fan will be adjusted to 50%.

[0077] If the average temperature of the module is less than 29°C and not less than 26°C, then the operating duty cycle of the corresponding battery module fan will be adjusted to 25%.

[0078] If the average temperature of the module is less than 26°C, the duty cycle of the corresponding battery module fan will be adjusted to 5%.

[0079] S402. If the maximum temperature difference within the stack is not lower than the first threshold, then adjust the operating duty cycle of the battery module fan in the second operating mode.

[0080] Specifically, the battery modules are sorted according to their lowest temperature, and the top 10% of battery modules with the lowest temperatures are designated as the first module. The operating duty cycle of the fan of the battery module corresponding to the first module is adjusted to the sixth duty cycle.

[0081] The battery modules are sorted according to their highest temperature. The top 10% of battery modules with the highest highest temperature are designated as the second module. The operating duty cycle of the fan of the battery module corresponding to the second module is adjusted to the first duty cycle.

[0082] If the highest temperature of the battery module is not lower than the second threshold, the operating duty cycle of the corresponding battery module fan will be adjusted to the first duty cycle.

[0083] Specifically, in this embodiment of the invention, the sixth duty cycle is preferably 0%, that is, if the maximum temperature difference within the stack is not less than 5°C, the battery modules with the lowest temperatures in the top 10% are selected as the first module, and the battery module fan corresponding to the first module is stopped; the battery modules with the highest temperatures in the top 10% are selected as the second module, and the battery module fan corresponding to the second module is operated at full speed; if the maximum temperature difference within the stack is not less than 5°C, and the highest temperature of the battery module is not less than 38°C, the duty cycle of the corresponding battery module fan is adjusted to 100%.

[0084] Understandably, when the temperature difference is too large, the lowest internal temperature of the energy storage system can be quickly increased by stopping the fan of the battery module corresponding to the lowest internal temperature, and the highest internal temperature of the energy storage system can be quickly decreased by running the fan of the battery module corresponding to the highest internal temperature. This allows for more precise and rapid control of the internal temperature difference of the energy storage system, increasing the consistency of the cells inside the battery stack.

[0085] As a further improvement of the present invention, if the maximum temperature difference within the stack is not lower than the first threshold, controlling the battery module fan to operate in a second operating mode further includes the following steps:

[0086] The battery module other than the first module and the second module is designated as the third module;

[0087] If the difference between the average temperature of the module and the average temperature of the stack in the third module is less than the seventh threshold, then the battery module fan corresponding to the third module is controlled to operate in the first operating mode.

[0088] Specifically, in this embodiment of the invention, the seventh threshold is preferably 2°C. That is, for a battery module in the energy storage system with a temperature in the middle 80%, if the difference between its average module temperature and the average stack temperature is less than 2°C, and the highest module temperature is greater than 38°C or the average module temperature is not lower than 35°C, then the operating duty cycle of the corresponding battery module fan is adjusted to 100%; if the average module temperature is less than 35°C and the average module temperature is not lower than 32°C, then the operating duty cycle of the corresponding battery module fan is adjusted to 75%; if the average module temperature is less than 32°C and the average module temperature is not lower than 29°C, then the operating duty cycle of the corresponding battery module fan is adjusted to 50%; if the average module temperature is less than 29°C and the average module temperature is not lower than 26°C, then the operating duty cycle of the corresponding battery module fan is adjusted to 25%; if the average module temperature is less than 26°C, then the operating duty cycle of the corresponding battery module fan is adjusted to 5%.

[0089] As a further improvement of this embodiment of the invention, if the difference between the average temperature of the module and the average temperature of the stack in the third module is not lower than a seventh threshold, and the average temperature of the module is higher than the average temperature of the stack, then the duty cycle of the battery module fan is adjusted by increasing the duty cycle by a first preset amount based on the adjustment of the duty cycle of the battery module fan in the first operating mode; if the difference between the average temperature of the module and the average temperature of the stack in the third module is not lower than a seventh threshold, and the average temperature of the module is lower than the average temperature of the stack, then the duty cycle of the battery module fan is adjusted by decreasing the duty cycle by a first preset amount based on the adjustment of the duty cycle of the battery module fan in the first operating mode.

[0090] Specifically, in this embodiment of the invention, the first preset amplitude is preferably 20%. That is, for a battery module in the energy storage system with a temperature in the middle 80% range, if the difference between its average module temperature and the average stack temperature is greater than 2°C and the average module temperature is higher than the average stack temperature, the overall duty cycle of the battery module fan is increased by 20% based on the adjustment of the operating duty cycle of the battery module fan in the first operating mode described above. Specifically, if the highest module temperature is greater than 38°C or the average module temperature is not lower than 35°C, the corresponding battery module fan is operated at full speed; if the average module temperature is lower than 35°C, the corresponding battery module fan is operated at full speed. If the module temperature is 35°C and the average module temperature is not lower than 32°C, the operating duty cycle of the corresponding battery module fan is adjusted to 95%; if the average module temperature is less than 32°C and the average module temperature is not lower than 29°C, the operating duty cycle of the corresponding battery module fan is adjusted to 70%; if the average module temperature is less than 29°C and the average module temperature is not lower than 26°C, the operating duty cycle of the corresponding battery module fan is adjusted to 45%; if the average module temperature is less than 26°C, the operating duty cycle of the corresponding battery module fan is adjusted to 25%.

[0091] If the difference between the average temperature of the module and the average temperature of the stack is greater than 2°C and the average temperature of the module is lower than the average temperature of the stack, the operating duty cycle of the battery module fan will be reduced by 20% based on the adjustment of the operating duty cycle of the battery module fan in the first operating mode described above. Specifically, if the highest temperature of the module is greater than 38°C or the average temperature of the module is not lower than 35°C, the operating duty cycle of the corresponding battery module fan will be adjusted to 80%; if the average temperature of the module is less than 35°C and the average temperature of the module is not lower than 32°C, the operating duty cycle of the corresponding battery module fan will be adjusted to 55%; if the average temperature of the module is less than 32°C and the average temperature of the module is not lower than 29°C, the operating duty cycle of the corresponding battery module fan will be adjusted to 30%; if the average temperature of the module is less than 29°C and the average temperature of the module is not lower than 26°C, the operating duty cycle of the corresponding battery module fan will be adjusted to 5%; if the average temperature of the module is less than 26°C, the corresponding battery module fan will be stopped.

[0092] The present invention provides a fan control method for battery modules in an energy storage system. By adjusting the operating duty cycle of the battery module fan according to the temperature data of the battery module and / or the temperature data of the battery stack, the temperature difference inside the battery stack can be quickly controlled, the consistency of the cells inside the battery stack can be increased, and the cycle life of the system can be improved.

[0093] Based on the above-described energy storage system battery module fan control method, this invention also provides an energy storage system battery module fan control device. Figure 4 A structural block diagram of a fan control device for a battery module in an energy storage system provided in an embodiment of the present invention is shown below. Figure 4As shown, the battery module fan control device of the energy storage system includes an acquisition module 401, a first calculation module 402, a second calculation module 403, and a control module 404.

[0094] The acquisition module 401 is used to acquire the cell temperature inside each battery module.

[0095] The first calculation module 402 is used to calculate the temperature data of the corresponding battery module based on the cell temperature. The temperature data of the battery module includes the module's highest temperature, the module's lowest temperature, and the module's average temperature.

[0096] The second calculation module 403 is used to calculate the temperature data of the corresponding battery stack based on the temperature data of the battery module. The temperature data of the battery stack includes the highest temperature inside the stack, the lowest temperature inside the stack, the maximum temperature difference inside the stack, and the average temperature of the stack.

[0097] The control module 404 is used to adjust the operating duty cycle of the battery module fan according to the temperature data of the battery module and / or the temperature data of the battery stack.

[0098] For other details regarding the implementation of the above technical solution by each module in the above-mentioned energy storage system battery module fan control device, please refer to the description in the above-mentioned energy storage system battery module fan control method provided in the embodiments of the invention, which will not be repeated here.

[0099] This application also provides a schematic diagram of the structure of a fan control device for a battery module in an energy storage system. Figure 5 A schematic diagram of the structure of a fan control device for a battery module in an energy storage system provided in this application embodiment is shown below. Figure 5 As shown, the battery module fan control device of the energy storage system may include: a processor 502 and a memory 501 communicatively connected to the processor; the memory 501 is used to store computer programs; the processor 502 is used to execute the computer programs stored in the memory 501, causing the processor 502 to perform the methods described in any of the above embodiments. Specifically, the memory 501 and the processor 502 can be connected via a bus.

[0100] For further details regarding the implementation of the above technical solution by the processor in the above-mentioned energy storage system battery module fan control device, please refer to the description in the above-mentioned energy storage system battery module fan control method provided in the embodiments of the invention, which will not be repeated here.

[0101] This application also provides a computer-readable storage medium storing computer program execution instructions, which, when executed by a processor, are used to implement the methods described in any of the embodiments of this application.

[0102] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the various parts is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple 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 communication connection shown or discussed may be an indirect coupling or communication connection through some interfaces, devices, or modules, and may be electrical, mechanical, or other forms.

[0103] The components in the device described as separate parts may or may not be physically separated. For example, a component in the register model may or may not be a physical unit; that is, it may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to implement the solution of this embodiment, depending on actual needs.

[0104] Furthermore, in the various embodiments of this application, the various parts of the device can be integrated into a processing unit, or they can exist as separate physical entities, or two or more can be integrated into a single unit. The unit formed by the sample can be implemented in hardware or in a combination of hardware and software functional units. The integrated module implemented as a software functional module can be stored in a computer-readable storage medium. This software functional module, stored in a storage medium, includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute some steps of the methods described in the various embodiments of this application.

[0105] It should be understood that the aforementioned processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. A general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the application can be directly manifested as being executed by a hardware processor, or executed by a combination of hardware and software modules within the processor.

[0106] The memory may include high-speed random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device, and may also be a USB flash drive, external hard drive, read-only memory, disk, or optical disk. The bus may 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.

[0107] The aforementioned storage medium can be implemented from 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 storage medium can be any available medium accessible to a general-purpose or special-purpose computer. An exemplary storage medium is coupled to a processor, enabling the processor to read information from and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can reside in an Application Specific Integrated Circuit (ASIC). Of course, processors and storage media can also exist as discrete components in the fan control equipment or main control equipment of the battery module in the energy storage system.

[0108] The foregoing has provided a detailed description of a fan control method, apparatus, device, and storage medium for a battery module in an energy storage system, as disclosed in the embodiments of the present invention. Although preferred embodiments of the present invention have been described, they are merely examples, and the present invention is not limited to the specific implementations described above. Those skilled in the art, once they understand the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, for those skilled in the art, equivalent modifications or substitutions made to the invention based on the concept of the present invention are also within the scope of the present invention. Equivalent transformations, modifications, and improvements made without departing from the spirit and principles of the present invention should all be covered within the scope of the present invention. In summary, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A fan control method for a battery module in an energy storage system, characterized in that, Includes the following steps: Obtain the cell temperature inside each battery module; The temperature data of the corresponding battery module is calculated based on the cell temperature. The temperature data of the battery module includes the module's highest temperature, the module's lowest temperature, and the module's average temperature. The temperature data of the corresponding battery stack is calculated based on the temperature data of the battery module. The temperature data of the battery stack includes the highest temperature inside the stack, the lowest temperature inside the stack, the maximum temperature difference inside the stack, and the average temperature of the stack. Adjust the operating duty cycle of the battery module fan according to the temperature data of the battery module and / or the temperature data of the battery stack; If the maximum temperature difference within the stack is less than the first threshold, the operating duty cycle of the battery module fan is adjusted in the first operating mode, that is, the operating duty cycle of the battery module fan is adjusted according to the highest temperature of the module or the average temperature of the module. If the maximum temperature difference within the stack is less than the first threshold and the highest temperature of the module is greater than the second threshold, the operating duty cycle of the battery module fan is adjusted according to the highest temperature of the module. If the maximum temperature difference within the stack is less than the first threshold and the highest temperature of the module is not higher than the second threshold, the operating duty cycle of the battery module fan is adjusted according to the average temperature of the module. If the maximum temperature difference within the stack is not lower than the first threshold, the operating duty cycle of the battery module fan is adjusted in the second operating mode.

2. The fan control method for a battery module in an energy storage system according to claim 1, characterized in that, The method of adjusting the operating duty cycle of the battery module fan in the first operating mode also includes: If the highest temperature of the module is greater than the second threshold or the average temperature of the module is not lower than the third threshold, then the operating duty cycle of the corresponding battery module fan will be adjusted to the first duty cycle. If the average temperature of the module is less than the third threshold and the average temperature of the module is not lower than the fourth threshold, then the operating duty cycle of the corresponding battery module fan will be adjusted to the second duty cycle. If the average temperature of the module is less than the fourth threshold and the average temperature of the module is not lower than the fifth threshold, then the operating duty cycle of the corresponding battery module fan will be adjusted to the third duty cycle. If the average temperature of the module is less than the fifth threshold and the average temperature of the module is not lower than the sixth threshold, then the operating duty cycle of the corresponding battery module fan will be adjusted to the fourth duty cycle. If the average temperature of the module is less than the sixth threshold, the operating duty cycle of the corresponding battery module fan will be adjusted to the fifth duty cycle. Wherein, the second threshold is greater than the third threshold, the third threshold is greater than the fourth threshold, the fourth threshold is greater than the fifth threshold, and the fifth threshold is greater than the sixth threshold.

3. The fan control method for a battery module in an energy storage system according to claim 1, characterized in that, If the maximum temperature difference within the stack is not lower than the first threshold, the battery module fan is controlled to operate in a second operating mode, including the following steps: The battery modules are sorted according to their lowest temperature. The top 10% of battery modules with the lowest temperatures are designated as the first module, and the operating duty cycle of the fan corresponding to the first module is adjusted to the sixth duty cycle. The battery modules are sorted according to their highest temperature. The top 10% of battery modules with the highest highest temperature are designated as the second module. The operating duty cycle of the fan of the battery module corresponding to the second module is adjusted to the first duty cycle. If the highest temperature of the battery module is not lower than the second threshold, the operating duty cycle of the corresponding battery module fan will be adjusted to the first duty cycle.

4. The fan control method for a battery module in an energy storage system according to claim 3, characterized in that, If the maximum temperature difference within the stack is not lower than the first threshold, controlling the battery module fan to operate in a second operating mode further includes the following steps: The battery module other than the first module and the second module is designated as the third module; If the difference between the average temperature of the module and the average temperature of the stack in the third module is less than the seventh threshold, then the battery module fan corresponding to the third module is controlled to operate in the first operating mode.

5. The fan control method for a battery module in an energy storage system according to claim 4, characterized in that, If the difference between the average temperature of the module and the average temperature of the stack in the third module is not lower than the seventh threshold, and the average temperature of the module is higher than the average temperature of the stack, then the duty cycle of the battery module fan in the third module is adjusted by increasing the duty cycle by a first preset amount based on the adjustment of the duty cycle of the battery module fan in the first operating mode. If the difference between the average temperature of the module and the average temperature of the stack in the third module is not lower than the seventh threshold, and the average temperature of the module is lower than the average temperature of the stack, then the operating duty cycle of the battery module fan in the third module is adjusted by reducing the duty cycle by a first preset amount based on adjusting the operating duty cycle of the battery module fan in the first operating mode.

6. A fan control device for a battery module of an energy storage system, the device being used to implement the fan control method for a battery module of an energy storage system according to any one of claims 1-5, characterized in that, include: The acquisition module is used to acquire the temperature of the cells inside each battery module; The first calculation module is used to calculate the temperature data of the corresponding battery module based on the temperature of the battery cell. The temperature data of the battery module includes the highest temperature of the module, the lowest temperature of the module, and the average temperature of the module. The second calculation module is used to calculate the temperature data of the corresponding battery stack based on the temperature data of the battery module. The temperature data of the battery stack includes the highest temperature inside the stack, the lowest temperature inside the stack, the maximum temperature difference inside the stack, and the average temperature of the stack. The control module is used to adjust the operating duty cycle of the battery module fan according to the temperature data of the battery module and / or the temperature data of the battery stack; If the maximum temperature difference within the stack is less than the first threshold, the operating duty cycle of the battery module fan is adjusted in the first operating mode, that is, the operating duty cycle of the battery module fan is adjusted according to the highest temperature of the module or the average temperature of the module. If the maximum temperature difference within the stack is less than the first threshold and the highest temperature of the module is greater than the second threshold, the operating duty cycle of the battery module fan is adjusted according to the highest temperature of the module. If the maximum temperature difference within the stack is less than the first threshold and the highest temperature of the module is not higher than the second threshold, the operating duty cycle of the battery module fan is adjusted according to the average temperature of the module. If the maximum temperature difference within the stack is not lower than the first threshold, the operating duty cycle of the battery module fan is adjusted in the second operating mode.

7. A fan control device for a battery module in an energy storage system, characterized in that, The energy storage system battery module fan control device includes: a memory and at least one processor, wherein the memory stores computer execution instructions; the at least one processor invokes the computer execution instructions in the memory to cause the energy storage system battery module fan control device to execute the energy storage system battery module fan control method as described in any one of claims 1-5.

8. A computer-readable storage medium storing computer-executable instructions thereon, characterized in that, The computer execution instructions are executed by the processor to implement the energy storage system battery module fan control method as described in any one of claims 1-5.

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