Energy storage cabinet

Abstract

The utility model relates to the technical field of energy storage cabinets, in particular to an energy storage cabinet which comprises a battery pack and a heat exchange unit, the battery pack comprises a liquid cooling plate, the heat exchange unit comprises a compressor, a reversing valve and a heat exchanger, and during refrigeration, the compressor, the reversing valve, the heat exchanger, the liquid cooling plate, the reversing valve and the compressor are sequentially communicated to form a circulating refrigeration path; during heating, the compressor, the reversing valve, the liquid cooling plate, the heat exchanger, the reversing valve and the compressor are sequentially communicated to form a circulating heating path. According to the scheme, the refrigerant directly flows through the liquid cooling plate for heat exchange, namely, the battery pack is refrigerated, the step of heat exchange between the refrigerant and the cooling liquid is reduced, the refrigeration efficiency is greatly improved, more energy is saved, when the refrigerant leaks, the refrigerant can be quickly volatilized, and generally, the potential safety hazard of short circuit or thermal runaway cannot be caused.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage cabinets, and in particular to an energy storage cabinet. Background Art

[0002] At present, the traditional liquid-cooled energy storage cabinet is equipped with a cooling unit and a plate heat exchanger inside. The refrigerant first cools the ethylene glycol aqueous solution through the plate heat exchanger, and then the low-temperature ethylene glycol aqueous solution flows through the liquid cooling plate of the battery pack to take away the heat in the battery pack. In this scheme, the refrigerant first exchanges heat with the ethylene glycol aqueous solution, and the ethylene glycol aqueous solution after heat exchange is used as a cooling liquid to cool the battery pack. There are many heat exchange links in the middle, the cooling efficiency is low, and the energy consumption is high. Utility Model Content

[0003] The purpose of the present application is to provide an energy storage cabinet, which to some extent solves the technical problems existing in the prior art in that in the liquid-cooled energy storage cabinet, the refrigerant first cools the ethylene glycol aqueous solution through a plate heat exchanger, and then the low-temperature ethylene glycol aqueous solution flows through the liquid-cooled battery pack to take away the heat, there are many intermediate heat exchange links, the refrigeration efficiency is low, and the energy consumption is high.

[0004] The present application provides an energy storage cabinet, comprising: a battery pack and a heat exchange unit; wherein the battery pack comprises a liquid cooling plate, and the heat exchange unit comprises a compressor, a reversing valve and a heat exchanger. When cooling, the compressor, the reversing valve, the heat exchanger, the liquid cooling plate, the reversing valve and the compressor are sequentially connected to form a circulating cooling path, and after the refrigerant flows out of the compressor, it flows through the reversing valve and the heat exchanger in sequence, and then flows into the liquid cooling plate. After the heat exchange of the refrigerant is completed, it flows out of the liquid cooling plate, flows through the reversing valve, and finally flows back into the compressor;

[0005] When heating, the compressor, the reversing valve, the liquid cooling plate, the heat exchanger, the reversing valve and the compressor are connected in sequence to form a circulating heating path, and after the refrigerant flows out of the compressor, it flows into the liquid cooling plate through the reversing valve. After the heat exchange of the refrigerant is completed, it flows out of the liquid cooling plate, then flows through the heat exchanger and the reversing valve in sequence, and finally flows back into the compressor.

[0006] In the above technical solution, further, the energy storage cabinet also includes a first heat exchange pipeline assembly and a second heat exchange pipeline assembly; wherein the liquid cooling plate is connected to the heat exchanger via the first heat exchange pipeline assembly; the liquid cooling plate is connected to the reversing valve via the second heat exchange pipeline assembly.

[0007] In any of the above technical solutions, further, the first heat exchange pipeline assembly includes a first main pipeline, a first merging pipeline and a first branch pipeline; wherein, the first branch pipeline is connected to the first main pipeline via the first merging pipeline, and the first main pipeline is also connected to the heat exchanger; the first branch pipeline corresponds to the liquid cooling plate one by one and is respectively connected.

[0008] In any of the above technical solutions, further, the first main line is provided with a first stop valve assembly.

[0009] In any of the above technical solutions, further, the first stop valve assembly includes a first stop valve and a second stop valve, and the first stop valve and the second stop valve are detachably connected.

[0010] In any of the above technical solutions, further, any of the first branch pipelines is provided with a second stop valve assembly.

[0011] In any of the above technical solutions, further, the second stop valve assembly includes a third stop valve and a fourth stop valve, and the third stop valve and the fourth stop valve are detachably connected.

[0012] In any of the above technical solutions, further, any of the first branch pipes is provided with an electronic expansion valve.

[0013] In any of the above technical solutions, further, the second heat exchange pipeline assembly includes a second main pipeline, a second merging pipeline and a second branch pipeline connected to the second main pipeline; wherein, the second branch pipeline is connected to the second main pipeline via the second merging pipeline, and the second main pipeline is also connected to the reversing valve; the second branch pipeline corresponds to the liquid cooling plate one by one and is respectively connected.

[0014] In any of the above technical solutions, further, any of the second branch pipelines is provided with a third stop valve assembly.

[0015] In any of the above technical solutions, further, the third stop valve assembly includes a fifth stop valve and a sixth stop valve, and the fifth stop valve and the sixth stop valve are detachably connected.

[0016] In any of the above technical solutions, further, the second main pipeline is provided with a fourth stop valve assembly.

[0017] In any of the above technical solutions, further, the fourth stop valve assembly includes a sixth stop valve and a seventh stop valve, and the sixth stop valve and the seventh stop valve are detachably connected.

[0018] In any of the above technical solutions, further, the number of the battery packs is multiple, and forms at least one column of battery packs arranged along the height direction of the energy storage cabinet.

[0019] In any of the above technical solutions, further, the energy storage cabinet also includes a main control box and an electric energy conversion module; wherein, along the height direction of the energy storage cabinet and from top to bottom, the main control box, the electric energy conversion module and the heat exchanger unit are sequentially arranged below the battery pack.

[0020] In any of the above technical solutions, further, the energy storage cabinet also includes a fan, and the fan is used to dissipate heat from the heat exchanger.

[0021] In any of the above technical solutions, further, the energy storage cabinet also includes a heating component, and the heating component is used to heat the heat exchanger.

[0022] In any of the above technical solutions, further, the energy storage cabinet also includes a water receiving container, and the water receiving container is arranged below the heat exchanger; and a drain pipe is connected to the bottom of the water receiving container.

[0023] In any of the above technical solutions, further, the reversing valve is a four-way reversing valve, and is formed with a first interface, a second interface, a third interface and a fourth interface, the first interface is connected to the inlet end of the compressor, the second interface is connected to the liquid cooling plate, the third interface is connected to the outlet end of the compressor, and the fourth interface is connected to the heat exchanger.

[0024] Compared with the prior art, the beneficial effects of this application are:

[0025] Compared with the traditional liquid-cooled energy storage cabinet, the refrigerant first cools the ethylene glycol aqueous solution through a plate heat exchanger, and then the low-temperature ethylene glycol aqueous solution flows through the liquid-cooled battery pack to take away the heat. In this solution, the refrigerant directly flows through the liquid cooling plate for heat exchange, that is, the battery pack is cooled, which reduces the steps of heat exchange between the refrigerant and the cooling liquid, thereby greatly improving the cooling efficiency and saving energy. Moreover, compared with the traditional liquid-cooled energy storage cabinet, when a leak occurs, the heat exchanged ethylene glycol aqueous solution may cause insulation failure of the conductive system, and even cause a short circuit, resulting in thermal runaway. In this solution, when the refrigerant leaks, the refrigerant can evaporate quickly, and generally will not cause safety hazards of short circuit or thermal runaway. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the present application 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A heat exchange flow chart of an energy storage cabinet provided in an embodiment of the present application;

[0028] Figure 2 A flow chart of the energy storage cabinet during refrigeration provided in an embodiment of the present application;

[0029] Figure 3 A flow chart of the energy storage cabinet heating provided in an embodiment of the present application;

[0030] Figure 4 An internal schematic diagram of an energy storage cabinet provided in an embodiment of the present application;

[0031] Figure 5 Another internal schematic diagram of the energy storage cabinet provided in an embodiment of the present application.

[0032] Reference numerals:

[0033] 1-battery pack, 2-heat exchange unit, 21-compressor, 22-reversing valve, 221-first interface, 222-second interface, 223-third interface, 224-fourth interface, 23-heat exchanger, 3-first stop valve assembly, 31-first stop valve, 32-second stop valve, 4-second stop valve assembly, 41-third stop valve, 42-fourth stop valve, 5-first heat exchange pipeline assembly, 51-first main pipeline, 52-first confluence pipeline, 53-first branch pipeline Road, 6-electronic expansion valve, 7-third stop valve assembly, 71-fifth stop valve, 72-sixth stop valve, 8-fourth stop valve assembly, 81-seventh stop valve, 82-eighth stop valve, 9-second heat exchange pipeline assembly, 91-second main pipeline, 92-second converging pipeline, 93-second branch pipeline, 10-fan, 11-heating component, 12-water receiving container, 13-drain pipe, 14-main control box, 15-electric energy conversion module, 16-cabinet, 17-cabinet door. DETAILED DESCRIPTION

[0034] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0035] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the present application.

[0036] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0037] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] Refer to the following Figures 1 to 5 An energy storage cabinet according to some embodiments of the present application is described.

[0040] See also Figures 1 to 5 As shown, an embodiment of the present application provides an energy storage cabinet, including: a battery pack 1 and a heat exchange unit 2; wherein the battery pack 1 includes a liquid cooling plate, and the heat exchange unit 2 includes a compressor 21, a reversing valve 22, and a heat exchanger 23. When cooling, the compressor 21, the reversing valve 22, the heat exchanger 23, the liquid cooling plate, the reversing valve 22, and the compressor 21 are sequentially connected to form a circulating cooling path, and after the refrigerant flows out of the compressor 21, it flows through the reversing valve 22 and the heat exchanger 23 in sequence, and then flows into the liquid cooling plate. After the heat exchange of the refrigerant is completed, it flows out of the liquid cooling plate, flows through the reversing valve 22, and finally flows back into the compressor 21;

[0041] When heating, the compressor 21, the reversing valve 22, the liquid cooling plate, the heat exchanger 23, the reversing valve 22 and the compressor 21 are connected in sequence to form a circulating heating path, and after the refrigerant flows out of the compressor 21, it flows into the liquid cooling plate through the reversing valve 22. After the heat exchange of the refrigerant is completed, it flows out of the liquid cooling plate, and then flows through the heat exchanger 23 and the reversing valve 22 in sequence, and finally flows back into the compressor 21.

[0042] According to the structure described above, the cooling and heating process of the heat exchange structure in the energy storage cabinet provided by the present application is as follows:

[0043] When cooling, Figure 2 As shown, after the refrigerant flows out of the compressor 21, it flows through the reversing valve 22 and the heat exchanger 23 in sequence, and then flows into the liquid cooling plate. The refrigerant evaporates and absorbs heat, thereby dissipating heat for the battery. After the heat exchange of the refrigerant is completed, it flows out of the liquid cooling plate, flows through the reversing valve 22, and finally flows back into the compressor 21;

[0044] When heating, Figure 3 As shown, after the refrigerant flows out of the compressor 21, it flows into the liquid cooling plate through the reversing valve 22 to condense and release heat to heat the battery. After the heat exchange of the refrigerant is completed, it flows out of the liquid cooling plate, then flows through the heat exchanger 23 and the reversing valve 22 in sequence, and finally flows back into the compressor 21.

[0045] It can be seen that compared with the solution in which the refrigerant in the traditional liquid-cooled energy storage cabinet first cools the ethylene glycol aqueous solution through the plate heat exchanger, and then the low-temperature ethylene glycol aqueous solution flows through the liquid-cooled battery pack to take away the heat, in this solution, the refrigerant directly flows through the liquid cooling plate for heat exchange, that is, the battery pack 1 is cooled, which reduces the steps of heat exchange between the refrigerant and the cooling liquid, thereby greatly improving the refrigeration efficiency and saving more energy. Moreover, compared with the traditional liquid-cooled energy storage cabinet, when leakage occurs, the heat-exchanged ethylene glycol aqueous solution may cause insulation failure of the conductive system, and even cause a short circuit, resulting in thermal runaway. In this solution, when the refrigerant leaks, the refrigerant can evaporate quickly, and generally will not cause safety hazards of short circuit or thermal runaway.

[0046] In this embodiment, preferably, Figures 1 to 3 As shown, the energy storage cabinet also includes a first heat exchange pipeline assembly 5 and a second heat exchange pipeline assembly 9; wherein the liquid cooling plate is connected to the heat exchanger 23 via the first heat exchange pipeline assembly 5; and the liquid cooling plate is connected to the reversing valve 22 via the second heat exchange pipeline assembly 9.

[0047] According to the structure described above, through the reasonable arrangement of the first heat exchange pipeline assembly 5 and the second heat exchange pipeline assembly 9, multiple battery packs 1 can be synchronously connected to the heat exchange unit 2, and synchronous heat exchange of multiple battery packs 1, such as cooling or heating, can be achieved.

[0048] In this embodiment, preferably, Figures 1 to 3 As shown, the first heat exchange pipeline assembly 5 includes a first main pipeline 51, a first merging pipeline 52 and a first branch pipeline 53; wherein the first branch pipeline 53 is connected to the first main pipeline 51 via the first merging pipeline 52, and the first main pipeline 51 is also connected to the heat exchanger 23; the first branch pipeline 53 corresponds to the liquid cooling plate one by one and is respectively connected.

[0049] Further, preferably, Figures 1 to 3 As shown, the second heat exchange pipeline assembly 9 includes a second main pipeline 91, a second merging pipeline 92 and a second branch pipeline 93 connected to the second main pipeline 91; wherein the second branch pipeline 93 is connected to the second main pipeline 91 via the second merging pipeline 92, and the second main pipeline 91 is also connected to the reversing valve 22; the second branch pipelines 93 correspond to the liquid cooling plates one by one and are respectively connected.

[0050] According to the structure described above, by designing the first branch pipeline 53 and the second branch pipeline 93, and making them respectively connected to the inlet end and the outlet end of the liquid cooling plate, it can be ensured that the refrigerant can flow into the liquid cooling plate of each battery pack 1 for synchronous heat exchange, and the aforementioned second merging pipeline 92 and the second merging pipeline 92 respectively play the role of connecting each first branch pipeline 53 and each second branch pipeline 93, which helps to save pipelines, reduce occupied space, and improve energy density; the first main pipeline 51 and the second main pipeline 91 respectively play the role of connecting the heat exchanger 23 and the reversing valve 22.

[0051] In this embodiment, preferably, Figures 1 to 3 As shown, the first main line 51 is provided with a first stop valve assembly 3 .

[0052] According to the structure described above, when a problem occurs in the heat exchange system, the first stop valve assembly 3 can be used to disconnect the connection with the heat exchanger 23, that is, the heat exchange system can be cut off and the refrigerant can be cut off to prevent the refrigerant from leaking, making it easier to repair the fault point.

[0053] In this embodiment, preferably, Figures 1 to 3 As shown, the first stop valve assembly 3 includes a first stop valve 31 and a second stop valve 32, and the first stop valve 31 and the second stop valve 32 are detachably connected.

[0054] According to the structure described above, the first stop valve 31 and the second stop valve 32 can be disassembled, which is convenient for disassembling the overall structure and realizing the shutoff operation of their respective pipelines to avoid leakage, thereby facilitating inspection and maintenance operations.

[0055] It should be noted that: currently two stop valves are often used in conjunction with each other, that is, the two stop valves are used in pairs and in conjunction with each other, and the stop valves at both ends can independently control the on-off of the pipeline, so the assembly structure of the two stop valves will not be described in detail here.

[0056] In this embodiment, preferably, Figures 1 to 3 As shown, any first branch pipeline 53 is provided with a second stop valve assembly 4 .

[0057] According to the structure described above, when a problem occurs in the heat exchange system, the second shut-off valve assembly 4 on the first branch pipe 53 can be used to disconnect the connection between each first branch pipe 53 and the battery pack 1, that is, to cut off the heat exchange system and cut off the refrigerant to prevent the refrigerant from leaking, thereby facilitating the repair of the fault point.

[0058] In this embodiment, preferably, Figures 1 to 3 As shown, the second stop valve assembly 4 includes a third stop valve 41 and a fourth stop valve 42, and the third stop valve 41 and the fourth stop valve 42 are detachably connected.

[0059] According to the structure described above, the third stop valve 41 and the fourth stop valve 42 can be disassembled, which is convenient for disassembling the overall structure and realizing the shutoff operation of their respective pipelines to avoid leakage, thereby facilitating inspection and maintenance operations.

[0060] In this embodiment, preferably, Figures 1 to 3 As shown, any first branch pipeline 53 is provided with an electronic expansion valve 6 .

[0061] According to the structure described above, the flow rate of the refrigerant in each branch pipeline can be adjusted to accurately control the temperature of each battery pack 1, reduce the temperature difference between the battery packs 1, ensure the temperature consistency of each battery pack 1, and improve the overall cycle life of the energy storage cabinet.

[0062] In this embodiment, preferably, Figures 1 to 3 As shown, any second branch pipeline 93 is provided with a third stop valve assembly 7 .

[0063] According to the structure described above, when a problem occurs in the heat exchange system, the third shut-off valve assembly 7 on the first branch pipe 53 can be used to disconnect each second branch pipe 93 from the battery pack 1, that is, to cut off the heat exchange system and cut off the refrigerant to prevent the refrigerant from leaking, thereby facilitating the repair of the fault point.

[0064] In this embodiment, preferably, Figures 1 to 3 As shown, the third stop valve assembly 7 includes a fifth stop valve 71 and a sixth stop valve 72, and the fifth stop valve 71 and the sixth stop valve 72 are detachably connected.

[0065] According to the structure described above, the fifth stop valve 71 and the sixth stop valve 72 can be disassembled, which is convenient for disassembling the overall structure and realizing the shutoff operation of their respective pipelines to avoid leakage, thereby facilitating inspection and maintenance operations.

[0066] In this embodiment, preferably, Figures 1 to 3 As shown, each of the second main pipes 91 is provided with a fourth stop valve assembly 8 .

[0067] According to the structure described above, when a problem occurs in the heat exchange system, the fourth stop valve 42 can be used in conjunction with the aforementioned third stop valve assembly 7 to completely separate the liquid cooling plate from the liquid cooling system, which is safer, more reliable, and.

[0068] In this embodiment, preferably, Figures 1 to 3 As shown, the fourth stop valve assembly 8 includes a sixth stop valve 72 and a seventh stop valve 81, and the sixth stop valve 72 and the seventh stop valve 81 are detachably connected.

[0069] According to the structure described above, the seventh stop valve 81 and the eighth stop valve 82 can be disassembled, which is convenient for disassembling the overall structure and realizing the shutoff operation of their respective pipelines to avoid leakage, thereby facilitating inspection and maintenance operations.

[0070] It can be seen that by utilizing the aforementioned first stop valve assembly 3, second stop valve assembly 4, third stop valve assembly 7 and fourth stop valve assembly 8, the battery pack 1, the first heat exchange pipeline assembly 5, the second heat exchange pipeline assembly 9 and the heat exchange unit 2 are completely divided into independent structures, and each section is ensured to be leak-proof of refrigerant, which is particularly convenient for repairing or replacing the battery pack 1.

[0071] It should be noted that the first stop valve assembly 3, the second stop valve assembly 4, the third stop valve assembly 7 and the fourth stop valve assembly 8 are not limited to including two stop valves connected together, but may also include only one stop valve, and the specific design can be based on actual needs.

[0072] In this embodiment, preferably, Figures 1 to 3 As shown, there are multiple battery packs 1, and they form at least one row of battery packs 1 arranged along the height direction of the energy storage cabinet.

[0073] According to the structure described above, the battery packs 1 are arranged in columns, which fully utilizes the space in the height direction and has a higher degree of integration. Furthermore, preferably, along the height direction of the energy storage cabinet and from top to bottom, the main control box 14, the power conversion module 15 and the heat exchanger unit 2 are sequentially arranged below the battery packs 1 in this column.

[0074] Further, preferably, a liquid cooling plate is provided at the bottom of each battery pack 1, and each liquid cooling plate is equipped with a first branch pipe 53 and a second branch pipe 93, and when the number of liquid cooling plates is multiple, the number of first branch pipes 53 and second branch pipes 93 are both multiple, and the multiple first branch pipes 53 share a first main pipe 51, and the multiple second branch pipes 93 share a second main pipe 91.

[0075] It should be noted that: it is not limited to one column of battery packs 1 in the present application, but can also be multiple columns of battery packs 1, and each column of battery packs 1 is equipped with a first heat exchange pipeline assembly 5 and a second heat exchange pipeline assembly 9, and the first heat exchange pipeline assembly 5 of each column can be connected together through a first connecting pipeline, and then the first connecting pipeline is connected to the heat exchanger 23, and the second heat exchange pipeline assembly 9 of each column is connected together through a second connecting pipeline, and then the second connecting pipeline is connected to the reversing valve 22. Of course, it is not limited to this, and can also be designed according to actual needs.

[0076] In addition, the number of battery packs 1 in the present application is not limited to multiple, but can also be one, depending on the actual needs.

[0077] In addition, in the present embodiment, each battery pack 1 is equipped with a liquid cooling plate, and the liquid cooling plate is located at the bottom of the battery pack 1. Of course, it is not limited to this. Each battery pack 1 may also be equipped with multiple liquid cooling plates. In addition, the position of the liquid cooling plate is not limited to being set at the bottom of the battery pack 1, but can also be designed at the top or middle position, or on the side, etc., or at other positions, depending on actual needs.

[0078] In this embodiment, preferably, Figures 1 to 3 As shown, the energy storage cabinet also includes a main control box 14 and an electric energy conversion module 15; wherein, along the height direction of the energy storage cabinet and from top to bottom, the main control box 14, the electric energy conversion module 15 and the heat exchanger unit 2 are sequentially arranged below the battery pack 1.

[0079] According to the structure described above, the heat exchanger unit 2 is installed at the bottom, and the main control box 14 with electrical components and the power conversion module 15 are installed on the top. In this way, once the heat exchanger unit 2 leaks, the electrical components will not be damaged, which is safer and more reliable.

[0080] In this embodiment, preferably, Figures 1 to 3 As shown, the energy storage cabinet further includes a fan 10 , and the fan 10 is used to dissipate heat from the heat exchanger 23 .

[0081] According to the structure described above, when the high-temperature refrigerant flows through the heat exchanger 23, the fan 10 can be used to dissipate heat from the heat exchanger 23 to accelerate the cooling of the refrigerant.

[0082] In this embodiment, preferably, Figures 1 to 3 As shown, the energy storage cabinet further includes a heating component 11 , and the heating component 11 is used to heat the heat exchanger 23 .

[0083] According to the structure described above, when the low-temperature refrigerant flows through the heat exchanger 23, frost will form on the outer wall of the heat exchanger 23. Therefore, the heating component 11 can be used to heat the outer wall of the heat exchanger 23 to melt the frost.

[0084] In this embodiment, preferably, Figures 1 to 3 As shown, the energy storage cabinet further includes a water receiving container 12 , and the water receiving container 12 is disposed below the heat exchanger 23 ; a drain pipe 13 is connected to the bottom of the water receiving container 12 .

[0085] According to the structure described above, when the outer wall of the heat exchanger 23 is heated by the heating component 11, the frost on the outer wall of the heat exchanger 23 melts and flows into the water receiving container 12 below, and is discharged to the outside of the energy storage cabinet through the drain pipe 13, which is safer and more reliable.

[0086] In this embodiment, preferably, Figures 1 to 3 As shown, the reversing valve 22 is a four-way reversing valve, and is formed with a first interface 221, a second interface 222, a third interface 223 and a fourth interface 224. The first interface 221 is connected to the inlet end of the compressor 21, the second interface 222 is connected to the liquid cooling plate, the third interface 223 is connected to the outlet end of the compressor 21, and the fourth interface 224 is connected to the heat exchanger 23.

[0087] According to the structure described above, when cooling, the outlet end of the compressor 21, the third interface 223 of the reversing valve 22, the fourth interface 224 of the reversing valve 22, the heat exchanger 23, the liquid cooling plate, the second interface 222 of the reversing valve 22, the first interface 221 of the reversing valve 22 and the inlet end of the compressor 21 are connected in sequence to form a circulating cooling path; when heating, the outlet end of the compressor 21, the third interface 223 of the reversing valve 22, the second interface 222 of the reversing valve 22, the liquid cooling plate, the heat exchanger 23, the fourth interface 224 of the reversing valve 22, the first interface 221 of the reversing valve 22 and the inlet end of the compressor 21 are connected in sequence to form a circulating heating path.

[0088] Further, preferably, the aforementioned second heat exchange pipeline assembly 9 is provided on the pipeline connecting the second interface 222 and the liquid cooling plate.

[0089] In this embodiment, preferably, Figure 5As shown, the energy storage cabinet provided in the present application also includes a cabinet body 16, and the aforementioned battery pack 1, main control box 14, power conversion module 15, heat exchange unit 2, first heat exchange pipeline assembly 5 and second heat exchange pipeline assembly 9 are all arranged in the cabinet body 16.

[0090] Furthermore, preferably, the cabinet body 16 is also provided with an openable cabinet door 17 for easy maintenance.

[0091] In this embodiment, preferably, Figure 5 As shown, the refrigerant may be R134a refrigerant, i.e., tetrafluoroethane refrigerant, or R410a refrigerant, i.e., a hydrofluorocarbon mixed refrigerant. Of course, it is not limited thereto, and the type of refrigerant may be selected according to actual needs.

[0092] In summary, the detailed process of cooling and heating of the heat exchange structure in the energy storage cabinet provided in this application is as follows:

[0093] When cooling, the third interface 223 of the reversing valve 22 is communicated with the fourth interface 224 of the reversing valve 22, and the second interface 222 of the reversing valve 22 is communicated with the first interface 221 of the reversing valve 22. After the refrigerant flows out from the outlet end of the compressor 21, it flows through the third interface 223 of the reversing valve 22, the fourth interface 224 of the reversing valve 22 and the heat exchanger 23 in sequence, and then flows into the liquid cooling plate. The refrigerant evaporates and absorbs heat, thereby dissipating heat for the battery. After the heat exchange of the refrigerant is completed, it flows out from the liquid cooling plate, and then flows through the second interface 222 of the reversing valve 22 and the first interface 221 of the reversing valve 22 in sequence, and finally flows back into the compressor 21.

[0094] When heating, the third interface 223 of the reversing valve 22 is connected to the second interface 222 of the reversing valve 22, and the fourth interface 224 of the reversing valve 22 is connected to the first interface 221 of the reversing valve 22. After the refrigerant flows out of the compressor 21, it passes through the third interface 223 of the reversing valve 22 and the second interface 222 of the reversing valve 22 in sequence, and then flows into the liquid cooling plate to condense and release heat to heat the battery. After the heat exchange of the refrigerant is completed, it flows out of the liquid cooling plate, and then flows through the heat exchanger 23, the fourth interface 224 of the reversing valve 22 and the first interface 221 of the reversing valve 22 in sequence, and finally flows back into the compressor 21.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An energy storage cabinet, characterized in that: include: A battery pack and a heat exchange unit; wherein the battery pack includes a liquid cooling plate, and the heat exchange unit includes a compressor, a reversing valve, and a heat exchanger. When cooling, the compressor, the reversing valve, the heat exchanger, the liquid cooling plate, the reversing valve, and the compressor are sequentially connected to form a circulating cooling path, and after the refrigerant flows out of the compressor, it flows through the reversing valve and the heat exchanger in sequence, and then flows into the liquid cooling plate. After the heat exchange of the refrigerant is completed, it flows out of the liquid cooling plate, flows through the reversing valve, and finally flows back into the compressor; When heating, the compressor, the reversing valve, the liquid cooling plate, the heat exchanger, the reversing valve and the compressor are connected in sequence to form a circulating heating path, and after the refrigerant flows out of the compressor, it flows into the liquid cooling plate through the reversing valve. After the heat exchange of the refrigerant is completed, it flows out of the liquid cooling plate, then flows through the heat exchanger and the reversing valve in sequence, and finally flows back into the compressor.

2. The energy storage cabinet according to claim 1, characterized in that: The energy storage cabinet also includes a first heat exchange pipeline assembly and a second heat exchange pipeline assembly; wherein the liquid cooling plate is connected to the heat exchanger via the first heat exchange pipeline assembly; and the liquid cooling plate is connected to the reversing valve via the second heat exchange pipeline assembly.

3. The energy storage cabinet according to claim 2, characterized in that: The first heat exchange pipeline assembly includes a first main pipeline, a first merging pipeline and a first branch pipeline; wherein the first branch pipeline is connected to the first main pipeline via the first merging pipeline, and the first main pipeline is also connected to the heat exchanger; the first branch pipeline corresponds to the liquid cooling plate one by one and is respectively connected.

4. The energy storage cabinet according to claim 3, characterized in that: The first main pipeline is provided with a first stop valve assembly.

5. The energy storage cabinet according to claim 4, characterized in that: The first stop valve assembly includes a first stop valve and a second stop valve, and the first stop valve and the second stop valve are detachably connected.

6. The energy storage cabinet according to claim 3, characterized in that: Any of the first branch pipelines is provided with a second stop valve assembly.

7. The energy storage cabinet according to claim 6, characterized in that: The second stop valve assembly includes a third stop valve and a fourth stop valve, and the third stop valve and the fourth stop valve are detachably connected.

8. The energy storage cabinet according to claim 3, characterized in that: Any of the first branch pipelines is provided with an electronic expansion valve.

9. The energy storage cabinet according to claim 2, characterized in that: The second heat exchange pipeline assembly includes a second main pipeline, a second merging pipeline, and a second branch pipeline connected to the second main pipeline; wherein the second branch pipeline is connected to the second main pipeline via the second merging pipeline, and the second main pipeline is also connected to the reversing valve; the second branch pipeline corresponds to the liquid cooling plate one by one and is respectively connected.

10. The energy storage cabinet according to claim 9, characterized in that: Any of the second branch pipelines is provided with a third stop valve assembly.

11. The energy storage cabinet according to claim 10, characterized in that: The third stop valve assembly includes a fifth stop valve and a sixth stop valve, and the fifth stop valve and the sixth stop valve are detachably connected.

12. The energy storage cabinet according to claim 9, characterized in that: The second main pipes are each provided with a fourth stop valve assembly.

13. The energy storage cabinet according to claim 12, characterized in that: The fourth stop valve assembly includes a sixth stop valve and a seventh stop valve, and the sixth stop valve and the seventh stop valve are detachably connected.

14. The energy storage cabinet according to claim 1, characterized in that: The number of the battery packs is plural, and the battery packs form at least one row of battery packs arranged along the height direction of the energy storage cabinet; and / or The energy storage cabinet further comprises a main control box and an electric energy conversion module; wherein, along the height direction of the energy storage cabinet and from top to bottom, the main control box, the electric energy conversion module and the heat exchange unit are sequentially arranged below the battery pack; and / or The energy storage cabinet further includes a fan, and the fan is used to dissipate heat from the heat exchanger; and / or The energy storage cabinet further includes a heating component, and the heating component is used to heat the heat exchanger; and / or The energy storage cabinet further includes a water receiving container, and the water receiving container is arranged below the heat exchanger; a drain pipe is connected to the bottom of the water receiving container; and / or The reversing valve is a four-way reversing valve, and is formed with a first interface, a second interface, a third interface and a fourth interface. The first interface is connected to the inlet end of the compressor, the second interface is connected to the liquid cooling plate, the third interface is connected to the outlet end of the compressor, and the fourth interface is connected to the heat exchanger.

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