Thermal Management System, Method and Server for Industrial and Commercial Energy Storage Cabinets

Abstract

The present invention provides a thermal management system, method and server for an industrial and commercial energy storage cabinet, relating to the technical field of system thermal management. The thermal management system of the industrial and commercial energy storage cabinet includes: a water-cooled unit, a controller, a first water-cooled circuit and a second water-cooled circuit. The first water-cooled circuit includes: a battery pack, and the second water-cooled circuit includes: an energy storage inverter; wherein, the water-cooled unit is used to control the temperature of the refrigerant flowing through the water-cooled unit in the first water-cooled circuit and the second water-cooled 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-cooled circuit and the second water-cooled 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-cooled unit and the connection state of the first water-cooled circuit and the second water-cooled circuit. 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.

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 inverters PCS. During the use of industrial and commercial energy storage cabinets, it is necessary to perform thermal management on the battery packs and PCS to maintain them at the optimal operating temperature. Currently, related technologies propose that due to the large volume and high temperature rise of traditional air-cooled PCS, its reliability and safety are affected, and the power of the air-cooled PCS is easily limited due to overheating during operation. Therefore, an overall liquid cooling solution can be adopted for the battery packs and PCS. However, in the above solution, if the PCS and the battery pack share the same water circuit, it will cause the water cooling unit to perform synchronous thermal management on the parts that do not need to work, resulting in a decrease in the overall operating efficiency of the water cooling unit. If two sets of water cooling units are set, the cost will be relatively high. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a thermal management system, method, and server for industrial and commercial energy storage cabinets, which can perform independent thermal management on the battery packs and energy storage inverters respectively, 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. The thermal management system for 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 respectively connected to the water cooling unit, the first water cooling circuit, and the second water cooling circuit. 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 connection state of the first water cooling circuit and the second water cooling circuit. Among them, the working modes of the water cooling unit include: a heating mode, a cooling mode, and a self-circulation mode.

[0005] In an implementation manner, the first water cooling circuit further includes: a first solenoid valve; wherein, the first water cooling circuit is used to close the first solenoid valve when the temperatures of all the battery cells in the battery pack are within the preset battery pack temperature threshold range, and 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 further includes: a second solenoid valve; wherein, the second water cooling circuit is configured to close the second solenoid valve when the lowest cell temperature in the battery pack is less than a preset minimum battery pack temperature threshold, and open the second solenoid valve when the lowest cell temperature in the battery pack is not less than the preset minimum battery pack temperature threshold.

[0007] In one embodiment, the thermal management system of the industrial and commercial energy storage cabinet further includes: a sensor set; wherein, the sensor set is configured to collect the cell temperatures of the individual cells in the battery pack, the inverter temperature of the energy storage inverter, and the outlet water temperature of the water cooling unit, and send the respective cell temperatures, inverter temperature, and outlet water 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. The method is applied to the thermal management system of the industrial and commercial energy storage cabinet provided in any one of the first aspect. 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 respectively connected to the water cooling unit, the first water cooling circuit, and the second water cooling circuit. The first water cooling circuit includes: a battery pack, and the second water cooling circuit includes: an energy storage inverter. The method includes: obtaining the cell temperatures of the individual cells in the battery pack sent by the sensor set, and the inverter temperature of the energy storage inverter; adjusting the working mode of the water cooling unit, and the connection states of the first water cooling circuit and the second water cooling circuit according to the cell temperature and the inverter temperature, so as to perform thermal management on the battery pack and the energy storage inverter respectively.

[0009] In one embodiment, the step of adjusting the working mode of the water cooling unit, and the connection states of the first water cooling circuit and the second water cooling circuit according to the cell temperature and the inverter temperature, so as 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 less than a preset minimum battery pack 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 independent heating treatment on the battery pack in the first water cooling circuit; when the lowest cell temperature in the battery pack is not less than the preset minimum battery pack temperature threshold, if the highest cell temperature is greater than or equal to a preset maximum battery pack temperature threshold, switching the water cooling unit to the cooling mode to perform synchronous cooling treatment on the battery pack in the first water cooling circuit and the energy storage inverter in the second water cooling circuit; when the lowest cell temperature in the battery pack is not less than the preset minimum battery pack temperature threshold, and the highest cell temperature is less than the preset maximum battery pack temperature threshold, if the inverter temperature is greater than or equal to a preset inverter temperature threshold, closing the first solenoid valve in the first water cooling circuit, and switching the water cooling unit to the cooling mode to perform independent cooling treatment on the energy storage inverter in the second water cooling circuit.

[0010] In one embodiment, the step of separately heating and treating the battery pack in the first water cooling loop includes: heating and treating the low-temperature water cooling liquid flowing through the battery pack in the first water cooling loop by a water cooling unit, and controlling the water cooling unit to stop working when the lowest cell temperature in the battery pack is greater than the first temperature control threshold.

[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 controlling the water cooling unit to switch to the self-circulation mode when the highest cell temperature in the battery pack is not greater than the second temperature control threshold, where the water cooling unit stops heating or cooling in the self-circulation mode, and the water cooling liquid starts the next water cooling cycle at the original temperature when flowing through the battery pack or the energy storage inverter; when the cell temperature difference between the 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 controlling the water cooling unit to switch to the self-circulation mode 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, so as to control the water cooling unit to stop working when the cell temperature difference between the cells in the battery pack is less than the preset temperature difference threshold.

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

[0014] In a third aspect, an embodiment of the present invention further provides a server, including a processor and a memory, where 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 the second aspect.

[0015] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, where 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 cause the processor to implement the method according to any one of the second aspect.

[0016] The embodiments of the present invention bring the following beneficial effects:

[0017] A thermal management system, method, and server for an industrial and commercial energy storage cabinet provided by an embodiment of the present invention. The system includes: a water-cooled unit, a controller, a first water-cooled circuit, and a second water-cooled circuit. The controller is respectively connected to the water-cooled unit, the first water-cooled circuit, and the second water-cooled circuit. The first water-cooled circuit includes: a battery pack, and the second water-cooled circuit includes: an energy storage inverter. Among them, the water-cooled unit is used to control the temperature of the refrigerant flowing through the water-cooled unit in the first water-cooled circuit and the second water-cooled 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-cooled circuit and the second water-cooled 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-cooled unit and the connection state of the first water-cooled circuit and the second water-cooled circuit. Among them, the working modes of the water-cooled unit include: a heating mode, a cooling mode, and a self-circulation mode. Embodiments 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 easier to adapt to harsh environments, and being able to operate normally in extremely cold and extremely hot weather.

[0018] Other features and advantages of the present invention will be described in the following specification, and in part, will be obvious from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention are achieved and obtained by the structures specifically pointed out in the specification, claims, and drawings.

[0019] To make the above objectives, features, and advantages of the present invention more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic structural diagram of a thermal management system for an industrial and commercial energy storage cabinet provided by an embodiment of the present invention;

[0022] Figure 2 It is a specific structural diagram of a thermal management system for an industrial and commercial energy storage cabinet provided by an embodiment of the present invention;

[0023] Figure 3 It is a schematic flow diagram of a thermal management method for an industrial and commercial energy storage cabinet provided by an embodiment of the present invention;

[0024] Figure 4Schematic diagram of the specific process of a thermal management method for an industrial and commercial energy storage cabinet provided by an embodiment of the present invention;

[0025] Figure 5 Schematic diagram of the structure of a server provided by an embodiment of the present invention. Detailed implementation manners

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] Currently, industrial and commercial energy storage cabinets mainly include battery packs and energy storage inverters PCS. During the use of industrial and commercial energy storage cabinets, it is necessary to perform thermal management on the battery packs and PCS to keep them at the optimal operating temperature. Related technologies propose that due to the large volume and high temperature rise of traditional air-cooled PCS, its reliability and safety are affected, and the power of the air-cooled PCS is easily limited due to overheating during operation. Therefore, an overall liquid cooling solution can be adopted for the battery packs and PCS. However, in the above solution, if the PCS and the battery pack share the same water circuit, it will cause the water cooling unit to perform synchronous thermal management on 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 relatively high. Based on this, the thermal management system, method, and server for industrial and commercial energy storage cabinets provided by the embodiments of the present invention can perform independent thermal management on the battery packs and energy storage inverters respectively, thereby significantly improving the reliability and safety of thermal management, making the system more adaptable to harsh environments, and being able to operate normally in extremely cold and hot weather.

[0028] To facilitate the understanding of this embodiment, first, a thermal management method for an industrial and commercial energy storage cabinet disclosed in the embodiments of the present invention will be introduced in detail. This method is applied to the thermal management system of the industrial and commercial energy storage cabinet. To facilitate the understanding of the thermal management system of the industrial and commercial energy storage cabinet, the embodiments of the present invention provide a schematic diagram of the structure of a thermal management system of an industrial and commercial energy storage cabinet, as Figure 1 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 respectively connected to the water cooling unit, the first water cooling circuit, and the second water cooling circuit. The first water cooling circuit includes: a battery pack, and the second water cooling circuit includes: an energy storage inverter.

[0029] See 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.

[0030] 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.

[0031] 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.

[0032] based on Figure 1 The schematic diagram of the 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:

[0033] Step S302: Obtain the cell temperatures of each cell in the battery pack and the inverter temperature of the energy storage inverter sent by the sensor set.

[0034] Step S304: Adjust 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 cell temperature and the inverter temperature, so as to perform thermal management on the battery pack and the energy storage inverter respectively. In one implementation, when the system is working, as long as the PCS starts to operate, the temperature rise is very fast. At this time, cooling is required for the PCS. However, if the battery does not require cooling at this time, or even requires heating, then one of the two water circuits is for cooling and the other is for operation or heating. The operating state of the water cooling unit needs to be different. If two sets of water cooling units are purchased, the cost will be relatively high. Therefore, referring to Figure 4 The embodiment of the present invention shown also provides an implementation manner for thermal management of an industrial and commercial energy storage cabinet. Specifically, refer to the following (1) to (4):

[0035] (1) When the lowest cell temperature in the battery pack is lower than the preset minimum battery pack temperature threshold, close the second solenoid valve in the second water cooling circuit and switch the water cooling unit to the heating mode to perform separate heating treatment on the battery pack in the first water cooling circuit. Among them, the preset minimum battery pack temperature threshold can be 10 degrees Celsius. In one implementation, the water cooling unit is used to perform heating treatment on the low-temperature water cooling liquid flowing through the battery pack in the first water cooling circuit, and when the lowest cell temperature in the battery pack is higher than the first temperature control threshold, control the water cooling unit to stop working. In practical applications, the first temperature control threshold can be 13 degrees Celsius. When the battery temperature is lower than 10°C, heating is required for the battery and no heating is required for the PCS. Close the solenoid valve 2 and run the strategy of process 1. That is to say, when the lowest battery temperature is lower than 10 degrees Celsius, close the solenoid valve 2 and turn on the heating mode, and the outlet water temperature is 25 degrees Celsius until the lowest battery temperature is higher than 13 degrees Celsius, then the water cooling unit stops working.

[0036] (2)When the lowest cell temperature in the battery pack is not less than the preset minimum battery pack temperature threshold, if the highest cell temperature is greater than or equal to the preset maximum battery pack temperature threshold, the water-cooling unit is switched to the refrigeration mode to synchronously cool the battery pack in the first water-cooling circuit and the energy storage inverter in the second water-cooling circuit. Among them, the preset maximum battery pack temperature threshold can be 30 degrees Celsius. In one implementation, through the water-cooling unit, the high-temperature water-cooling liquid flowing through the battery pack in the first water-cooling circuit and the high-temperature water-cooling liquid flowing through the energy storage inverter in the second water-cooling circuit are cooled. 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. Among them, the water-cooling unit stops heating or refrigerating in the self-circulation mode, and 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 cells in the battery pack is less than the preset temperature difference threshold, the water-cooling unit is controlled to stop working. In practical applications, the second temperature control threshold can be 28 degrees Celsius, and the preset temperature difference threshold can be 6 degrees Celsius. When the battery is higher than 30°C, liquid cooling is required for the battery and PCS, and at this time, the solenoid valve does not need to act, and the strategy of process 2 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 refrigeration mode is turned on, the outlet water 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.

[0037] (3) When the lowest cell temperature in the battery pack is not less than the preset minimum battery pack temperature threshold and the highest cell temperature is less than the preset maximum battery pack temperature threshold, if the inverter temperature is greater than or equal to the preset inverter temperature threshold, close the first solenoid valve in the first water cooling circuit and switch the water chiller to the cooling mode to perform separate cooling treatment on the energy storage inverter in the second water cooling circuit. The preset inverter temperature threshold can be 45 degrees Celsius. In one implementation, the water chiller cools the high-temperature water coolant flowing through the energy storage inverter in the second water cooling circuit. 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, control the water chiller to switch to the self-circulation mode. When the temperature difference between the cells in the battery pack is less than the preset temperature difference threshold, control the water chiller to stop working. In practical applications, the third temperature threshold can be 43 degrees Celsius. When 10°C < battery < 30°C, judge the solenoid valve state and its operating mode according to the operating temperature of the PCS and the battery temperature. The process 3 strategy is executed in this temperature range. That is to say, when the lowest cell temperature in the battery pack is not less than 10 degrees Celsius and the highest battery temperature is less than 30 degrees Celsius, if the highest PCS temperature is greater than or equal to 45 degrees Celsius, close solenoid valve 1 and turn on the cooling mode, with the outlet water temperature of 25 degrees Celsius. If it is detected that the cell temperature is greater than or equal to 30 degrees Celsius, open solenoid valve 1. If the cell temperature is less than or equal to 28 degrees Celsius or the PCS temperature is less than or equal to 43 degrees Celsius, enter the self-circulation mode for ten minutes. If the temperature difference between the cells in the battery pack is less than or equal to 6 degrees Celsius, the water chiller stops working.

[0038] In addition, when performing separate cooling treatment on the energy storage inverter in the second water cooling circuit, if it is detected that the cell temperature is greater than 30 degrees Celsius, reopen the first solenoid valve.

[0039] (4) When the lowest cell temperature in the battery pack is not less than the preset minimum battery pack temperature threshold and the highest cell temperature is less than the preset maximum battery pack 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 the inverter temperature.

[0040] In summary, the whole cabinet liquid cooling solution of the present invention can perform separate heating and cooling on the PCS and the battery pack. When the temperature is relatively high, the air-cooled PCS will quickly have its power limited due to overheating during operation, while the liquid-cooled PCS does not have the above situation. In addition, the traditional air-cooled PCS is large in volume, has a high temperature rise, and its reliability and safety are both affected, while the liquid-cooled PCS can avoid this problem.

[0041] In addition, the present invention can also increase the operating temperature of the system environment, making it easier to adapt to harsh environments and enabling normal operation in extremely cold and hot weather, thus avoiding the situations of non-starting at low temperatures and over-temperature limits; avoiding cooling the PCS and the battery pack simultaneously when the temperature is extremely low, and heating the PCS and the battery pack simultaneously when heating the battery pack; avoiding cooling the PCS and the battery pack simultaneously when the core temperature is moderate. Therefore, the overall operating efficiency of the system can be improved (the energy storage system is for peak shaving and valley filling, and many users rely on this for income. If the system itself consumes a large part of the electric energy, it will reduce the system conversion rate and thus the overall income of the users).

[0042] The device provided by the embodiment of the present invention has the same implementation principle and the same technical effects as those of the foregoing method embodiment. For a brief description, for the parts not mentioned in the device embodiment, reference may be made to the corresponding content in the foregoing method embodiment.

[0043] The embodiment of the present invention provides a server. Specifically, the server includes a processor and a storage device; a computer program is stored on the storage device, and when the computer program is run by the processor, it executes the method described in any one of the foregoing implementation manners.

[0044] Figure 5 FIG. 10 is a schematic structural diagram of a server provided by an embodiment of the present invention. The server 100 includes: a processor 50, a memory 51, a bus 52, and a communication interface 53. The processor 50, the communication interface 53, and the memory 51 are connected through the bus 52; the processor 50 is used to execute an executable module stored in the memory 51, such as a computer program.

[0045] Among them, the memory 51 may include a high-speed random access memory (RAM, Random Access Memory), and may also include a non-volatile memory, such as at least one disk memory. Through at least one communication interface 53 (which can be wired or wireless), a communication connection is realized between the system network element and at least one other network element, and the Internet, wide area network, local area network, metropolitan area network, etc. can be used.

[0046] The bus 52 may be an ISA bus, a PCI bus, an EISA bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For the sake of convenience of representation, Figure 5 only a bidirectional arrow is used in FIG. 10, but it does not mean that there is only one bus or one type of bus.

[0047] Among them, the memory 51 is used to store a program. After receiving an execution instruction, the processor 50 executes the program. The method executed by the device defined by the flow process disclosed in any embodiment of the foregoing embodiments of the present invention can be applied to or implemented by the processor 50.

[0048] 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 integrated logic circuit in the hardware of the processor 50 or instructions in the form of software. The above-mentioned processor 50 may be a general-purpose processor, including a central processing unit (CPU for short), a network processor (NP for short), etc.; it may also be a digital signal processor (DSP for short), an application specific integrated circuit (ASIC for short), a field-programmable gate array (FPGA for short), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present invention can be directly embodied as being executed and completed by the hardware decoding processor, or completed by a combination of the hardware and software modules in the decoding processor. The software module may be located in a mature storage medium in the art 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. This storage medium is located in the memory 51, and the processor 50 reads the information in the memory 51 and combines its hardware to complete the steps of the above method.

[0049] The computer program product of the readable storage medium provided by the embodiments of the present invention includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the method described in the foregoing method embodiments. For the specific implementation, reference can be made to the foregoing method embodiments and will not be elaborated herein.

[0050] When the above-mentioned 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, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs.

[0051] Finally, it should be noted that the above-mentioned embodiments are only specific implementation manners of the present invention, used to illustrate the technical solutions of the present invention, rather than limiting it. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art within the technical scope disclosed by the present invention can still modify the technical solutions recorded in the foregoing embodiments, or can easily think of changes, or perform equivalent replacements on some of the technical features; 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 all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A thermal management method for industrial and commercial energy storage cabinets, characterized in that: The method is applied to a thermal management system of an industrial and commercial energy storage cabinet, which comprises: a water cooling unit, a controller, a first water cooling circuit and a second water cooling circuit, wherein 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 comprises: a battery pack, 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 connection 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; Wherein, the first water cooling circuit further includes: a first solenoid valve; wherein, 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 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; Wherein, the second water cooling circuit further includes: a second solenoid valve; wherein, the second water cooling circuit is used to close the second solenoid valve when the lowest cell temperature in the battery pack is less than a preset battery pack lowest temperature threshold, and to open the second solenoid valve when the lowest cell temperature in the battery pack is not less than the preset battery pack lowest temperature threshold; The thermal management system of the industrial and commercial energy storage cabinet further includes: a sensor set; wherein the sensor set is used to collect the cell temperature of each cell in the battery pack, the inverter temperature of the energy storage inverter and the outlet water temperature of the water cooling unit, and send each of the cell temperature, the inverter temperature and the outlet water temperature to the controller; The method comprises: acquiring the cell temperature of each cell in the battery pack and the inverter temperature of the energy storage inverter sent by a sensor set; According to the battery core 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; Wherein, the steps of 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 according to the battery cell temperature and the inverter temperature to respectively perform thermal management on the battery pack and the energy storage inverter include: 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 a heating mode to perform a 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 a 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 the 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; 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 loop 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 loop; Among them, the step of synchronously cooling the battery pack in the first water-cooling circuit and the energy storage inverter in the second water-cooling circuit includes: cooling the high-temperature water-cooling liquid flowing through the battery pack in the first water-cooling circuit and the high-temperature water-cooling liquid flowing through the energy storage inverter in the second water-cooling circuit 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, controlling the water-cooling unit 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 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; Among them, when the lowest battery cell temperature in the battery pack is lower than the 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; when the lowest battery cell temperature in the battery pack is not lower than the preset battery pack lowest temperature threshold, if the highest battery cell temperature is greater than or equal to the preset battery pack highest temperature threshold, the water cooling unit is switched to the cooling mode to cool the battery pack in the first water cooling circuit and the energy storage inverter in the second water cooling circuit synchronously; when the lowest battery cell temperature in the battery pack is not lower than the preset battery pack lowest temperature threshold, if the highest battery cell temperature is greater than or equal to the preset battery pack highest temperature threshold, the water cooling unit is switched to the cooling mode to cool the battery pack in the first water cooling circuit and the energy storage inverter in the second water cooling circuit synchronously; When the minimum battery pack temperature is greater than the preset battery pack maximum temperature threshold, and the maximum 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 on the energy storage inverter in the second water cooling circuit; when the minimum battery cell temperature in the battery pack is not less than the preset battery pack minimum temperature threshold, and the maximum 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, the battery cell temperature and the inverter temperature continue to be temperature controlled and monitored.

2. The thermal management method for industrial and commercial energy storage cabinets according to claim 1, 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.

3. The thermal management method for industrial and commercial energy storage cabinets according to claim 1, 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.

4. The thermal management method for industrial and commercial energy storage cabinets according to claim 1, 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.

5. 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 1 to 4.

6. A computer-readable storage medium, characterized in that: The computer-readable storage medium 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 the method according to any one of claims 1 to 4.

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