Thermal management system and method of industrial and commercial energy storage cabinet and server

Abstract

The invention provides a thermal management system and method of an industrial and commercial energy storage cabinet and a server, and relates to the technical field of system thermal management, the thermal management system of the industrial and commercial energy storage cabinet comprises a water cooling unit, a controller, a first water cooling loop and a second water cooling loop, the first water cooling loop comprises a battery pack, and the second water cooling loop comprises an energy storage inverter; wherein the water-cooling unit is used for controlling the temperature of refrigerant fluid flowing through the water-cooling unit in the first water-cooling loop and the second water-cooling loop by starting a heating mode or a refrigeration mode in a working state, so that the outlet water temperature of the first water-cooling loop and the second water-cooling loop is maintained at a preset temperature value; the controller is used for conducting heat management on the battery pack and the energy storage inverter by switching the working mode of the water cooling unit and the communication state of the first water cooling loop and the second water cooling loop. According to the invention, independent thermal management can be carried out on the battery pack and the energy storage inverter, so that the reliability and safety of thermal management are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of system thermal management, and in particular to a thermal management system, method and server for industrial and commercial energy storage cabinets. Background Art

[0002] Industrial and commercial energy storage cabinets mainly include battery packs and energy storage inverter PCS. During the use of industrial and commercial energy storage cabinets, it is necessary to maintain the battery packs and PCS at the optimal operating temperature through thermal management. At present, relevant technologies have proposed that due to the large size and high temperature rise of traditional air-cooled PCS, its reliability and safety are affected, and the air-cooled PCS is prone to power limitation due to overheating during operation. Therefore, an overall liquid cooling solution can be adopted for the battery pack and PCS. However, in the above solution, if the PCS and the battery pack are in the same water circuit, the water cooling unit will cause the synchronous thermal management of the parts that do not need to work, thereby affecting the overall operating efficiency of the water cooling unit. If two sets of water cooling units are set up, the cost will be higher. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a thermal management system, method and server for industrial and commercial energy storage cabinets, which can independently perform thermal management on battery packs and energy storage inverters, thereby significantly improving the reliability and safety of thermal management.

[0004] In a first aspect, an embodiment of the present invention provides a thermal management system for an industrial and commercial energy storage cabinet, wherein the thermal management system for the industrial and commercial energy storage cabinet comprises: a water cooling unit, a controller, a first water cooling circuit and a second water cooling circuit, wherein the controller is respectively connected to the water cooling unit, the first water cooling circuit and the second water cooling circuit, wherein the first water cooling circuit comprises: a battery pack, and the second water cooling circuit comprises: an energy storage inverter; wherein the water cooling unit is used to control the temperature of the refrigerant flowing through the first water cooling circuit and the second water cooling circuit in a working state by turning on a heating mode or a cooling mode, so that the outlet water temperature of the first water cooling circuit and the second water cooling circuit is maintained at a preset temperature value; the controller is used to perform thermal management on the battery pack and the energy storage inverter respectively by switching the working mode of the water cooling unit and the connectivity state of the first water cooling circuit and the second water cooling circuit, wherein the working modes of the water cooling unit include: a heating mode, a cooling mode and a self-circulation mode.

[0005] In one embodiment, the first water cooling circuit also includes: a first solenoid valve; wherein the first water cooling circuit is used to close the first solenoid valve when the temperatures of each battery cell in the battery pack are within a preset battery pack temperature threshold range, and to open the first solenoid valve when there is a battery cell temperature in the battery pack that is not within the preset battery pack temperature threshold range.

[0006] In one embodiment, the second water cooling circuit also includes: a second solenoid valve; wherein the second water cooling circuit is used to close the second solenoid valve when the lowest battery cell temperature in the battery pack is less than a preset battery pack minimum temperature threshold, and to open the second solenoid valve when the lowest battery cell temperature in the battery pack is not less than a preset battery pack minimum temperature threshold.

[0007] In one embodiment, the thermal management system of the industrial and commercial energy storage cabinet also includes: a sensor collection; wherein the sensor collection is used to collect the cell temperature of each cell in the battery pack, the inverter temperature of the energy storage inverter, and the water outlet temperature of the water cooling unit, and send each cell temperature, inverter temperature, and water outlet temperature to the controller.

[0008] In a second aspect, an embodiment of the present invention further provides a thermal management method for an industrial and commercial energy storage cabinet, and the method is applied to a thermal management system of an industrial and commercial energy storage cabinet as provided in any one of the first aspects, and the thermal management system of the industrial and commercial energy storage cabinet includes: a water cooling unit, a controller, a first water cooling circuit, and a second water cooling circuit, and the controller is respectively connected to the water cooling unit, the first water cooling circuit, and the second water cooling circuit, and the first water cooling circuit includes: a battery pack, and the second water cooling circuit includes: an energy storage inverter, and the method includes: obtaining the cell temperature of each battery cell in the battery pack sent by the sensor set, and the inverter temperature of the energy storage inverter; according to the battery cell temperature and the inverter temperature, adjusting the working mode of the water cooling unit and the connectivity status of the first water cooling circuit and the second water cooling circuit, so as to perform thermal management on the battery pack and the energy storage inverter respectively.

[0009] In one embodiment, the working mode of the water cooling unit and the connectivity status of the first water cooling circuit and the second water cooling circuit are adjusted according to the battery cell temperature and the inverter temperature to perform thermal management steps for the battery pack and the energy storage inverter respectively, including: when the lowest battery cell temperature in the battery pack is less than a preset battery pack minimum temperature threshold, closing the second solenoid valve in the second water cooling circuit, and switching the water cooling unit to the heating mode to perform separate heating treatment on the battery pack in the first water cooling circuit; when the lowest battery cell temperature in the battery pack is not less than the preset battery pack minimum temperature threshold, if the highest When the battery cell temperature is greater than or equal to the preset battery pack maximum temperature threshold, the water cooling unit is switched to cooling mode to synchronously cool the battery pack in the first water cooling circuit and the energy storage inverter in the second water cooling circuit; when the lowest battery cell temperature in the battery pack is not less than the preset battery pack minimum temperature threshold, and the highest battery cell temperature is less than the preset battery pack maximum temperature threshold, if the inverter temperature is greater than or equal to the preset inverter temperature threshold, the first solenoid valve in the first water cooling circuit is closed, and the water cooling unit is switched to cooling mode to separately cool the energy storage inverter in the second water cooling circuit.

[0010] In one embodiment, the step of performing a separate heating treatment on the battery pack in the first water cooling circuit includes: using a water cooling unit to heat the low-temperature water cooling liquid flowing through the battery pack in the first water cooling circuit, and when the lowest battery cell temperature in the battery pack is greater than a first temperature control threshold, controlling the water cooling unit to stop working.

[0011] In one embodiment, the step of synchronously cooling the battery pack in the first water cooling loop and the energy storage inverter in the second water cooling loop includes: cooling the high-temperature water-cooling liquid flowing through the battery pack in the first water cooling loop and the high-temperature water-cooling liquid flowing through the energy storage inverter in the second water cooling loop by a water cooling unit, and when the highest battery cell temperature in the battery pack is not greater than the second temperature control threshold, controlling the water cooling unit to switch to a self-circulation mode, wherein the water cooling unit stops heating or cooling in the self-circulation mode, so that the water-cooling liquid starts the next round of water cooling cycle at the original temperature when flowing through the battery pack or the energy storage inverter; when the battery cell temperature difference between the battery cells in the battery pack is less than the preset temperature difference threshold, controlling the water cooling unit to stop working.

[0012] In one embodiment, the step of separately cooling the energy storage inverter in the second water cooling loop includes: cooling the high-temperature water-cooling liquid flowing through the energy storage inverter in the second water cooling loop by a water cooling unit, and when the highest battery cell temperature in the battery pack is not greater than the second temperature control threshold and the inverter temperature is not greater than the third temperature threshold, controlling the water cooling unit to switch to a self-circulation mode, so as to control the water cooling unit to stop working when the battery cell temperature difference between the battery cells in the battery pack is less than a preset temperature difference threshold.

[0013] In one embodiment, the method also includes: when the lowest battery cell temperature in the battery pack is not less than a preset battery pack minimum temperature threshold, and the highest battery cell temperature is less than a preset battery pack maximum temperature threshold, if the inverter temperature is less than a preset inverter temperature threshold, then continue to perform temperature control monitoring on the battery cell temperature and the inverter temperature.

[0014] In a third aspect, an embodiment of the present invention further provides a server, comprising a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement any one of the methods provided in the second aspect.

[0015] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to implement any one of the methods provided in the second aspect.

[0016] The embodiments of the present invention bring the following beneficial effects: An embodiment of the present invention provides a thermal management system, method and server for an industrial and commercial energy storage cabinet. The system includes: a water cooling unit, a controller, a first water cooling loop and a second water cooling loop. The controller is connected to the water cooling unit, the first water cooling loop and the second water cooling loop respectively. The first water cooling loop includes: a battery pack, and the second water cooling loop includes: an energy storage inverter. The water cooling unit is used to control the temperature of the refrigerant flowing through the water cooling unit in the first water cooling loop and the second water cooling loop by turning on the heating mode or the cooling mode in the working state, so that the outlet water temperature of the first water cooling loop and the second water cooling loop is maintained at a preset temperature value. The controller is used to perform thermal management on the battery pack and the energy storage inverter respectively by switching the working mode of the water cooling unit and the connection state of the first water cooling loop and the second water cooling loop. The working mode of the water cooling unit includes: a heating mode, a cooling mode and a self-circulation mode. The embodiment of the present invention can perform independent thermal management on the battery pack and the energy storage inverter respectively, thereby significantly improving the reliability and safety of thermal management, making the system more adaptable to harsh environments and operating normally in both extremely cold and extremely hot weather.

[0017] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of a thermal management system for an industrial and commercial energy storage cabinet provided by an embodiment of the present invention; Figure 2 A schematic diagram of the specific structure of a thermal management system for an industrial and commercial energy storage cabinet provided by an embodiment of the present invention; Figure 3 A schematic flow chart of a thermal management method for an industrial and commercial energy storage cabinet provided in an embodiment of the present invention; Figure 4 A schematic diagram of a specific process of a thermal management method for an industrial and commercial energy storage cabinet provided by an embodiment of the present invention; Figure 5 A schematic diagram of the structure of a server provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described in combination with the embodiments below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] At present, industrial and commercial energy storage cabinets mainly include battery packs and energy storage inverter PCS. During the use of industrial and commercial energy storage cabinets, it is necessary to maintain the battery packs and PCS at the optimal working temperature through thermal management. The relevant technology proposes that due to the large size and high temperature of the traditional air-cooled PCS, its reliability and safety are affected, and the air-cooled PCS is prone to power limitation due to overheating during operation. Therefore, an overall liquid cooling solution can be adopted for the battery pack and PCS. However, in the above solution, if the PCS and the battery pack are in the same water channel, the water cooling unit will cause the synchronous thermal management of the parts that do not need to work, thereby affecting the overall operating efficiency of the water cooling unit. If two sets of water cooling units are set, the cost will be high. Based on this, the thermal management system, method and server of the industrial and commercial energy storage cabinet provided by the present invention can independently thermally manage the battery pack and the energy storage inverter, thereby significantly improving the reliability and safety of thermal management, making the system more adaptable to harsh environments and able to operate normally in extremely cold and hot weather.

[0023] To facilitate understanding of this embodiment, a thermal management method for an industrial and commercial energy storage cabinet disclosed in an embodiment of the present invention is first described in detail. The method is applied to a thermal management system for an industrial and commercial energy storage cabinet. To facilitate understanding of the thermal management system for an industrial and commercial energy storage cabinet, an embodiment of the present invention provides a schematic diagram of a thermal management system for an industrial and commercial energy storage cabinet, such as Figure 1 As shown, the thermal management system of the industrial and commercial energy storage cabinet includes: a water cooling unit, a controller, a first water cooling circuit and a second water cooling circuit. The controller is connected to the water cooling unit, the first water cooling circuit and the second water cooling circuit respectively. The first water cooling circuit includes: a battery pack, and the second water cooling circuit includes: an energy storage inverter.

[0024] See also Figure 2A specific structural schematic diagram of a thermal management system of an industrial and commercial energy storage cabinet is shown, wherein the water cooling unit is used to control the temperature of the refrigerant flowing through the water cooling unit in the first water cooling circuit and the second water cooling circuit by turning on the heating mode or the cooling mode in the working state, so that the outlet water temperature of the first water cooling circuit and the second water cooling circuit is maintained at a preset temperature value; the controller is used to perform thermal management on the battery pack and the energy storage inverter respectively by switching the working mode of the water cooling unit and the connection state of the first water cooling circuit and the second water cooling circuit, wherein the working modes of the water cooling unit include: heating mode, cooling mode and self-circulation mode. In actual application, if the outlet water temperature is 25 degrees Celsius, in the self-circulation mode, if the temperature of the water-cooled liquid is 28 degrees Celsius after one cycle, the water cooling unit is not used to adjust the outlet water temperature to 25 degrees Celsius, but the next cycle is started at 28 degrees Celsius.

[0025] In one embodiment, the first water cooling circuit further includes: a first solenoid valve (ie, Figure 2 The second water cooling circuit also includes: a second solenoid valve (ie, Figure 2 The first water cooling circuit is used to close the first solenoid valve when the temperature of each battery cell in the battery pack is within the preset battery pack temperature threshold range, and to open the first solenoid valve when there is a battery cell temperature in the battery pack that is not within the preset battery pack temperature threshold range, wherein, Figure 2 PACK1, PACK2, PACK3, PACK4, PACK5 are cell 1, cell 2, cell 3, cell 4 and cell 5 in the battery pack respectively; the second water cooling circuit is used for closing the second solenoid valve when the lowest cell temperature in the battery pack is lower than a preset battery pack lowest temperature threshold, and opening the second solenoid valve when the lowest cell temperature in the battery pack is not lower than a preset battery pack lowest temperature threshold.

[0026] In addition, the thermal management system of the industrial and commercial energy storage cabinet also includes: a sensor collection; wherein the sensor collection is used to collect the cell temperature of each cell in the battery pack, the inverter temperature of the energy storage inverter and the water outlet temperature of the water cooling unit, and send each cell temperature, inverter temperature and water outlet temperature to the controller.

[0027] based on Figure 1 The structural diagram of a thermal management system of an industrial and commercial energy storage cabinet is shown in FIG. Figure 2 The specific structural diagram of a thermal management system for an industrial and commercial energy storage cabinet is shown in FIG. The thermal management method for an industrial and commercial energy storage cabinet is described in detail in the embodiment of the present invention. Figure 3 The flowchart of a thermal management method for an industrial and commercial energy storage cabinet is shown, and the method mainly includes the following steps S302 to S304: Step S302, obtaining the cell temperature of each cell in the battery pack and the inverter temperature of the energy storage inverter sent by the sensor assembly.

[0028] Step S304, according to the battery cell temperature and the inverter temperature, the working mode of the water cooling unit and the connection state of the first water cooling circuit and the second water cooling circuit are adjusted to perform thermal management on the battery pack and the energy storage inverter respectively. In one embodiment, when the system is working, as long as the PCS starts to operate, the temperature rises very quickly. At this time, the PCS needs to be cooled. However, if the battery does not need to be cooled or even needs to be heated at this time, one of the two water circuits is cooling and the other is operating or heating. The operating state of the water cooling unit is different. If two sets of water cooling units are purchased, the cost is high. Therefore, see Figure 4 The embodiment of the present invention shown also provides an implementation method for thermal management of industrial and commercial energy storage cabinets, see (1) to (4) below for details: (1) When the lowest cell temperature in the battery pack is lower than a preset battery pack lowest temperature threshold, the second solenoid valve in the second water cooling circuit is closed, and the water cooling unit is switched to the heating mode to heat the battery pack in the first water cooling circuit separately, wherein the preset battery pack lowest temperature threshold may be 10 degrees Celsius. In one embodiment, the low-temperature water cooling liquid flowing through the battery pack in the first water cooling circuit is heated by the water cooling unit, and when the lowest cell temperature in the battery pack is higher than the first temperature control threshold, the water cooling unit is controlled to stop working. In actual application, the first temperature control threshold may be 13 degrees Celsius. When the battery temperature is lower than 10 degrees Celsius, the battery needs to be heated, but the PCS does not need to be heated. The solenoid valve 2 is closed and the process 1 strategy is run. That is, when the lowest battery temperature is lower than 10 degrees Celsius, the solenoid valve 2 is closed, the heating mode is turned on, and the water outlet temperature is 25 degrees Celsius until the lowest battery temperature is higher than 13 degrees Celsius, at which time the water cooling unit stops working.

[0029] (2) When the lowest cell temperature in the battery pack is not less than a preset battery pack lowest temperature threshold, if the highest cell temperature is greater than or equal to a preset battery pack highest temperature threshold, the water cooling unit is switched to a cooling mode to perform synchronous cooling treatment on the battery pack in the first water cooling loop and the energy storage inverter in the second water cooling loop, wherein the preset battery pack highest temperature threshold may be 30 degrees Celsius. In one embodiment, the high-temperature water cooling liquid flowing through the battery pack in the first water cooling loop and the high-temperature water cooling liquid flowing through the energy storage inverter in the second water cooling loop are cooled by the water cooling unit, and when the highest cell temperature in the battery pack is not greater than the second temperature control threshold, the water cooling unit is controlled to switch to a self-circulation mode, wherein the water cooling unit stops heating or cooling in the self-circulation mode. , so that the water-cooling liquid starts the next round of water cooling cycle at the original temperature when it flows through the battery pack or energy storage inverter. When the temperature difference between the cells in the battery pack is less than the preset temperature difference threshold, the water cooling unit is controlled to stop working. In actual applications, the second temperature control threshold can be 28 degrees Celsius, and the preset temperature difference threshold can be 6 degrees Celsius. If the battery temperature is higher than 30°C, the battery and PCS need to be liquid cooled. At this time, the solenoid valve does not need to be operated, and the process 2 strategy is executed. That is to say, when the minimum battery temperature is not less than 10 degrees Celsius, if the maximum battery temperature is greater than or equal to 30 degrees Celsius, the cooling mode is turned on, the water outlet temperature is 25 degrees Celsius, and the self-circulation mode is turned on for 10 minutes. At this time, if the temperature difference between the cells in the battery pack is less than or equal to 6 degrees Celsius, the water cooling unit stops working.

[0030] (3) When the lowest cell temperature in the battery pack is not less than a preset battery pack lowest temperature threshold, and the highest cell temperature is less than a preset battery pack highest temperature threshold, if the inverter temperature is greater than or equal to the preset inverter temperature threshold, the first solenoid valve in the first water cooling circuit is closed, and the water cooling unit is switched to the cooling mode to perform a separate cooling treatment on the energy storage inverter in the second water cooling circuit, wherein the preset inverter temperature threshold may be 45 degrees Celsius. In one embodiment, the high-temperature water-cooling liquid flowing through the energy storage inverter in the second water cooling circuit is cooled by the water cooling unit, and when the highest cell temperature in the battery pack is not greater than the second temperature control threshold, and the inverter temperature is not greater than the third temperature threshold, the water cooling unit is controlled to switch to the self-circulation mode, so that when the cell temperature difference between the cells in the battery pack is less than the preset temperature difference threshold, the water cooling unit is controlled to switch to the self-circulation mode. The water cooling unit stops working. In actual applications, the third temperature threshold can be 43 degrees Celsius. When 10℃<battery<30℃, the state of the solenoid valve and its operating mode are determined according to the operating temperature of the PCS and the battery temperature. The process 3 strategy is executed in this temperature range. That is, when the lowest temperature of the battery cell in the battery pack is not less than 10 degrees Celsius and the highest temperature of the battery is less than 30 degrees Celsius, if the highest temperature of the PCS is greater than or equal to 45 degrees Celsius, the solenoid valve 1 is closed to start the cooling mode, and the outlet water temperature is 25 degrees Celsius. If the battery cell temperature is monitored to be greater than or equal to 30 degrees Celsius, the solenoid valve 1 is opened. If the battery cell temperature is less than or equal to 28 degrees Celsius, or the PCS temperature is less than or equal to 43 degrees Celsius, the self-circulation mode is entered for ten minutes. If the temperature difference between the batteries in the battery pack is less than or equal to 6 degrees Celsius, the water cooling unit stops working.

[0031] In addition, when the energy storage inverter in the second water cooling circuit is cooled separately, if the battery cell temperature is detected to be greater than 30 degrees Celsius, the first solenoid valve is reopened.

[0032] (4) When the lowest cell temperature in the battery pack is not less than the preset battery pack minimum temperature threshold, and the highest cell temperature is less than the preset battery pack maximum temperature threshold, if the inverter temperature is less than the preset inverter temperature threshold, continue to perform temperature control monitoring on the cell temperature and inverter temperature.

[0033] In summary, the whole cabinet liquid cooling solution of the present invention can heat and cool the PCS and battery pack separately. When the temperature is high, the air-cooled PCS will soon be overheated during operation and its power will be limited. The liquid-cooled PCS does not have the above situation. In addition, the traditional air-cooled PCS is large in size, the temperature rises, and the reliability and safety are affected. The liquid-cooled PCS can avoid this problem.

[0034] In addition, the present invention can also increase the system operating environment temperature, making it easier to adapt to harsh environments and operate normally in extremely cold and hot weather, avoiding the situation of not starting at low temperature and being limited at high temperature; avoiding cooling the battery pack while cooling the PCS when the temperature is extremely low, and heating the PCS while heating the battery pack; avoiding cooling the battery pack while cooling the PCS when the battery cell temperature is moderate, thereby improving the overall operating efficiency of the system (the energy storage system is peak shaving and valley filling, and many users rely on this benefit. If the system itself consumes a large part of the electrical energy, it will reduce the system conversion rate, thus reducing the overall benefit of the user).

[0035] The device provided in the embodiment of the present invention has the same implementation principle and technical effects as those of the aforementioned method embodiment. For the sake of brief description, for matters not mentioned in the device embodiment, reference may be made to the corresponding contents in the aforementioned method embodiment.

[0036] An embodiment of the present invention provides a server. Specifically, the server includes a processor and a storage device. The storage device stores a computer program, and when the computer program is executed by the processor, it executes the method described in any one of the above-mentioned embodiments.

[0037] Figure 5 A structural diagram of a server provided in an embodiment of the present invention, the server 100 includes: a processor 50, a memory 51, a bus 52 and a communication interface 53, wherein the processor 50, the communication interface 53 and the memory 51 are connected via the bus 52; the processor 50 is used to execute an executable module stored in the memory 51, such as a computer program.

[0038] The memory 51 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk memory. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 53 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used.

[0039] The bus 52 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0040] Among them, the memory 51 is used to store programs, and the processor 50 executes the program after receiving the execution instruction. The method executed by the device for flow process definition disclosed in any embodiment of the above-mentioned embodiment of the present invention can be applied to the processor 50 or implemented by the processor 50.

[0041] The processor 50 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 50. The above processor 50 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in the embodiments of the present invention can be directly embodied as a hardware decoding processor to be executed, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 51, and the processor 50 reads the information in the memory 51 and completes the steps of the above method in combination with its hardware.

[0042] The computer program product of the readable storage medium provided in the embodiment of the present invention includes a computer-readable storage medium storing program code, and the instructions included in the program code can be used to execute the methods described in the previous method embodiments. The specific implementation can be referred to the previous method embodiments, which will not be repeated here.

[0043] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0044] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A thermal management system for industrial and commercial energy storage cabinets, characterized in that: The thermal management system of the industrial and commercial energy storage cabinet includes: a water cooling unit, a controller, a first water cooling circuit and a second water cooling circuit. The controller is connected to the water cooling unit, the first water cooling circuit and the second water cooling circuit respectively. The first water cooling circuit includes: a battery pack, and the second water cooling circuit includes: an energy storage inverter; wherein, The water cooling unit is used to control the temperature of the refrigerant flowing through the water cooling unit in the first water cooling circuit and the second water cooling circuit by turning on the heating mode or the cooling mode in the working state, so that the outlet water temperature of the first water cooling circuit and the second water cooling circuit is maintained at a preset temperature value; The controller is used to perform thermal management on the battery pack and the energy storage inverter respectively by switching the working mode of the water cooling unit and the connectivity status of the first water cooling circuit and the second water cooling circuit, wherein the working modes of the water cooling unit include: heating mode, cooling mode and self-circulation mode.

2. The thermal management system of the industrial and commercial energy storage cabinet according to claim 1, characterized in that: The first water cooling circuit also includes: a first solenoid valve; wherein, The first water cooling circuit is used to close the first solenoid valve when the temperatures of each battery cell in the battery pack are within a preset battery pack temperature threshold range, and to open the first solenoid valve when there is a battery cell temperature in the battery pack that is not within the preset battery pack temperature threshold range.

3. The thermal management system of the industrial and commercial energy storage cabinet according to claim 1, characterized in that: The second water cooling circuit also includes: a second solenoid valve; wherein, The second water cooling circuit is used to close the second solenoid valve when the lowest battery cell temperature in the battery pack is lower than a preset battery pack lowest temperature threshold, and to open the second solenoid valve when the lowest battery cell temperature in the battery pack is not lower than a preset battery pack lowest temperature threshold.

4. The thermal management system of the industrial and commercial energy storage cabinet according to claim 1, characterized in that: The thermal management system of the industrial and commercial energy storage cabinet also includes: a sensor set; wherein, The sensor assembly is used to collect the cell temperature of each cell in the battery pack, the inverter temperature of the energy storage inverter and the water outlet temperature of the water cooling unit, and send each of the cell temperature, inverter temperature and water outlet temperature to the controller.

5. A thermal management method for industrial and commercial energy storage cabinets, characterized in that: The method is applied to the thermal management system of the industrial and commercial energy storage cabinet according to any one of claims 1 to 4, wherein the thermal management system of the industrial and commercial energy storage cabinet comprises: a water cooling unit, a controller, a first water cooling circuit and a second water cooling circuit, wherein the controller is respectively connected to the water cooling unit, the first water cooling circuit and the second water cooling circuit, wherein the first water cooling circuit comprises: a battery pack, and the second water cooling circuit comprises: an energy storage inverter, wherein the method comprises: Acquire the cell temperature of each cell in the battery pack and the inverter temperature of the energy storage inverter sent by the sensor set; According to the battery cell temperature and the inverter temperature, the working mode of the water cooling unit and the connectivity status of the first water cooling circuit and the second water cooling circuit are adjusted to perform thermal management on the battery pack and the energy storage inverter respectively.

6. The thermal management method for industrial and commercial energy storage cabinets according to claim 5, characterized in that: The step of adjusting the working mode of the water cooling unit and the connection state of the first water cooling circuit and the second water cooling circuit according to the battery core temperature and the inverter temperature to perform thermal management on the battery pack and the energy storage inverter respectively includes: When the lowest cell temperature in the battery pack is lower than a preset battery pack lowest temperature threshold, closing the second solenoid valve in the second water cooling circuit, and switching the water cooling unit to a heating mode to heat the battery pack in the first water cooling circuit individually; When the lowest cell temperature in the battery pack is not less than a preset battery pack lowest temperature threshold, if the highest cell temperature is greater than or equal to a preset battery pack highest temperature threshold, the water cooling unit is switched to a cooling mode to synchronously cool the battery pack in the first water cooling loop and the energy storage inverter in the second water cooling loop; When the lowest battery cell temperature in the battery pack is not less than the preset battery pack minimum temperature threshold, and the highest battery cell temperature is less than the preset battery pack maximum temperature threshold, if the inverter temperature is greater than or equal to the preset inverter temperature threshold, the first solenoid valve in the first water cooling circuit is closed, and the water cooling unit is switched to the cooling mode to perform separate cooling treatment on the energy storage inverter in the second water cooling circuit.

7. The thermal management method for industrial and commercial energy storage cabinets according to claim 6, characterized in that: The step of performing a separate heating treatment on the battery pack in the first water cooling circuit includes: The water cooling unit is used to heat the low-temperature water cooling liquid flowing through the battery pack in the first water cooling circuit, and when the lowest battery cell temperature in the battery pack is greater than a first temperature control threshold, the water cooling unit is controlled to stop working.

8. The thermal management method for industrial and commercial energy storage cabinets according to claim 6, characterized in that: The step of synchronously cooling the battery pack in the first water cooling loop and the energy storage inverter in the second water cooling loop includes: The high-temperature water-cooling liquid flowing through the battery pack in the first water-cooling loop and the high-temperature water-cooling liquid flowing through the energy storage inverter in the second water-cooling loop are cooled by the water-cooling unit, and when the highest cell temperature in the battery pack is not greater than the second temperature control threshold, the water-cooling unit is controlled to switch to the self-circulation mode, wherein the water-cooling unit stops heating or cooling in the self-circulation mode, so that the water-cooling liquid starts the next round of water-cooling cycle at the original temperature when flowing through the battery pack or the energy storage inverter; When the temperature difference between the battery cells in the battery pack is less than a preset temperature difference threshold, the water cooling unit is controlled to stop working.

9. The thermal management method for industrial and commercial energy storage cabinets according to claim 6, characterized in that: The step of performing a separate cooling process on the energy storage inverter in the second water cooling circuit includes: The high-temperature water-cooling liquid flowing through the energy storage inverter in the second water-cooling circuit is cooled by the water-cooling unit, and when the highest battery cell temperature in the battery pack is not greater than the second temperature control threshold and the inverter temperature is not greater than the third temperature threshold, the water-cooling unit is controlled to switch to the self-circulation mode, so that when the battery cell temperature difference between the battery cells in the battery pack is less than the preset temperature difference threshold, the water-cooling unit is controlled to stop working.

10. The thermal management method for industrial and commercial energy storage cabinets according to claim 6, characterized in that: The method further comprises: When the lowest battery cell temperature in the battery pack is not less than the preset battery pack minimum temperature threshold, and the highest battery cell temperature is less than the preset battery pack maximum temperature threshold, if the inverter temperature is less than the preset inverter temperature threshold, continue to perform temperature control monitoring on the battery cell temperature and the inverter temperature.

11. A server, characterized in that: The method comprises a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the method according to any one of claims 5 to 10.

12. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to implement the method according to any one of claims 5 to 10.

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