Energy storage cabinet

Abstract

Embodiments of the present application relate to the technical field of energy storage cabinets, and in particular to an energy storage cabinet, comprising battery packs and a heat exchange unit. The battery packs comprise liquid cooling plates. The heat exchange unit comprises a compressor, a reversing valve, and a heat exchanger. When refrigeration is performed, the compressor, the reversing valve, the heat exchanger, the liquid cooling plates, the reversing valve and the compressor are sequentially communicated to form a circulating refrigeration path. When heating is performed, the compressor, the reversing valve, the liquid cooling plates, the heat exchanger, the reversing valve and the compressor are sequentially communicated to form a circulating heating path. In the solution, a refrigerant directly flows through the liquid cooling plates for heat exchange, that is, the battery packs are refrigerated, reducing the heat exchange steps of the refrigerant and a cooling liquid, thereby greatly improving the refrigeration efficiency, and saving more energy; additionally, in the solution, when the refrigerant leaks, the refrigerant can be rapidly volatilized, generally avoiding the potential safety hazard of a short circuit or thermal runaway.

Description

Energy storage cabinet

[0001] Cross-reference to related applications

[0002] The present disclosure claims priority to the Chinese patent application No. 202421135977.X, filed on May 22, 2024, entitled "Energy storage cabinet", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of energy storage cabinets, in particular to an energy storage cabinet. BACKGROUND

[0004] At present, the traditional liquid-cooled energy storage cabinet is provided with a cooling unit, and a plate heat exchanger is arranged 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 then the heat-exchanged ethylene glycol aqueous solution is used as a cooling liquid to cool the battery pack. There are many intermediate heat exchange links, the refrigeration efficiency is low, and the energy consumption is large.

[0005] SUMMARY

[0006] The present application aims to provide an energy storage cabinet, which solves the technical problem of the liquid-cooled energy storage cabinet in the prior art, in which 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-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 large.

[0007] 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 refrigerating, the compressor, the reversing valve, the heat exchanger, the liquid cooling plate, the reversing valve and the compressor are sequentially connected in communication to form a circulating refrigeration path, and the refrigerant flows out of the compressor, then flows through the reversing valve and the heat exchanger in sequence, and then flows into the liquid cooling plate; after the refrigerant is heat-exchanged, it flows out of the liquid cooling plate, then flows through the reversing valve, and finally flows back into the compressor.

[0008] When heating, the compressor, the reversing valve, the liquid cooling plate, the heat exchanger, the reversing valve and the compressor are sequentially connected in communication to form a circulating heating path, and the refrigerant flows out of the compressor, then flows into the liquid cooling plate through the reversing valve, and after the refrigerant is heat-exchanged, 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.

[0009] In an optional embodiment, the energy storage cabinet further comprises a first heat exchange pipe assembly and a second heat exchange pipe assembly; wherein the liquid cooling plate is in communication with the heat exchanger via the first heat exchange pipe assembly; and the liquid cooling plate is in communication with the reversing valve via the second heat exchange pipe assembly.

[0010] In an optional embodiment, the first heat exchange pipe assembly comprises a first main pipe, a first merging pipe and a first branch pipe; wherein the first branch pipe is in communication with the first main pipe via the first merging pipe, and the first main pipe is further in communication with the heat exchanger; and the first branch pipe is in one-to-one correspondence with the liquid cooling plate and is in communication with the liquid cooling plate respectively.

[0011] In an optional embodiment, the first main pipe is provided with a first stop valve assembly.

[0012] In an optional embodiment, the first stop valve assembly comprises a first stop valve and a second stop valve, and the first stop valve and the second stop valve are detachably connected.

[0013] In an optional embodiment, any of the first branch pipes is provided with a second stop valve assembly.

[0014] In an optional embodiment, the second stop valve assembly comprises a third stop valve and a fourth stop valve, and the third stop valve and the fourth stop valve are detachably connected.

[0015] In an optional embodiment, any of the first branch pipes is provided with an electronic expansion valve.

[0016] In an optional embodiment, the second heat exchange pipe assembly comprises a second main pipe, a second merging pipe and a second branch pipe in communication with the second main pipe; wherein the second branch pipe is in communication with the second main pipe via the second merging pipe, and the second main pipe is further in communication with the reversing valve; and the second branch pipe is in one-to-one correspondence with the liquid cooling plate and is in communication with the liquid cooling plate respectively.

[0017] In an optional embodiment, any of the second branch pipes is provided with a third stop valve assembly.

[0018] In an optional embodiment, the third stop valve assembly comprises a fifth stop valve and a sixth stop valve, and the fifth stop valve and the sixth stop valve are detachably connected.

[0019] In an optional embodiment, the second main pipe is provided with a fourth stop valve assembly.

[0020] In an optional embodiment, the fourth stop valve assembly comprises a sixth stop valve and a seventh stop valve, and the sixth stop valve and the seventh stop valve are detachably connected.

[0021] In an optional embodiment, the number of the battery packs is multiple, and at least one column of the battery packs is arranged along the height direction of the energy storage cabinet.

[0022] In an optional embodiment, 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 packs.

[0023] In an optional embodiment, the energy storage cabinet further comprises a fan, and the fan is configured to dissipate heat from the heat exchanger.

[0024] In an optional embodiment, the energy storage cabinet further comprises a heating member, and the heating member is configured to heat the heat exchanger.

[0025] In an optional embodiment, the energy storage cabinet further comprises a water collecting container, and the water collecting container is arranged below the heat exchanger; the bottom of the water collecting container is connected with a drain pipe.

[0026] In an optional embodiment, the reversing valve is a four-way reversing valve, and it is formed with a first interface, a second interface, a third interface and a fourth interface; the first interface is in communication with the inlet end of the compressor, the second interface is in communication with the liquid cooling plate, the third interface is in communication with the outlet end of the compressor, and the fourth interface is in communication with the heat exchanger.

[0027] Compared with the prior art, the application has the following advantages:

[0028] Compared with the scheme in which, in the traditional liquid-cooled energy storage cabinet, 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-cooled battery pack to take away the heat, in the present scheme, the refrigerant directly flows through the liquid-cooled plate for heat exchange, i.e. the battery pack is refrigerated, which reduces the steps of heat exchange between the refrigerant and the cooling liquid, thereby greatly improving the refrigeration efficiency and saving 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 conduction system, and even cause short circuit, leading to thermal runaway; in the present scheme, when the refrigerant leaks, the refrigerant can quickly evaporate, and generally does not cause the safety hazards of short circuit or thermal runaway. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the specific embodiments or the prior art, the drawings needed in the following specific embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0030] Fig. 1 is a heat exchange flow chart of the energy storage cabinet provided by the embodiment of the present application;

[0031] Fig. 2 is a flow chart of the energy storage cabinet when refrigerating provided by the embodiment of the present application;

[0032] Fig. 3 is a flow chart of the energy storage cabinet when heating provided by the embodiment of the present application;

[0033] Fig. 4 is an internal schematic diagram of the energy storage cabinet provided by the embodiment of the present application;

[0034] Fig. 5 is an internal schematic diagram of the energy storage cabinet provided by the embodiment of the present application.

[0035] Reference signs:

[0036] 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 merging pipeline, 53-first branch pipeline, 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 merging pipeline, 93-second branch pipeline, 10-fan, 11-heating member, 12-water receiving container, 13-drain pipe, 14-main control box, 15-electric energy conversion module, 16-cabinet body, 17-cabinet door. DETAILED DESCRIPTION

[0037] The technical solutions of the present application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0038] The components of the embodiments of the present application generally described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application.

[0039] Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0040] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship 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, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only configured for description purposes and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] The energy storage cabinet according to some embodiments of the present application is described below with reference to FIGS. 1-5.

[0043] Referring to FIGS. 1-5, the embodiments of the present application provide an energy storage cabinet, comprising: a battery pack 1 and a heat exchange unit 2; wherein the battery pack 1 comprises a liquid cooling plate, and the heat exchange unit 2 comprises a compressor 21, a reversing valve 22 and a heat exchanger 23; when refrigerating, 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 in communication to form a circulating refrigeration path, and the refrigerant flows out from the compressor 21, then flows through the reversing valve 22 and the heat exchanger 23 in turn, and then flows into the liquid cooling plate, and the refrigerant flows out from the liquid cooling plate after completing heat exchange, then flows through the reversing valve 22, and finally flows back into the compressor 21;

[0044] 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 sequentially connected in communication to form a circulating heating path, and the refrigerant flows out from the compressor 21, then flows into the liquid cooling plate through the reversing valve 22, the refrigerant flows out from the liquid cooling plate after completing heat exchange, then flows through the heat exchanger 23 and the reversing valve 22 in turn, and finally flows back into the compressor 21.

[0045] According to the structure described above, the refrigeration and heating processes of the heat exchange structure in the energy storage cabinet provided by the present application are as follows:

[0046] When refrigerating, as shown in FIG. 2, the refrigerant flows out of the compressor 21, then flows through the reversing valve 22 and the heat exchanger 23, and then flows into the liquid cooling plate. The refrigerant evaporates and absorbs heat, thereby cooling the battery. After the heat exchange of the refrigerant is completed, the refrigerant flows out of the liquid cooling plate, then flows through the reversing valve 22, and finally flows back into the compressor 21.

[0047] When heating, as shown in FIG. 3, the refrigerant flows out of the compressor 21, then flows into the liquid cooling plate through the reversing valve 22, and then performs condensation and heat release, thereby heating the battery. After the heat exchange of the refrigerant is completed, the refrigerant 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.

[0048] It can be seen that, compared with the scheme in which 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 battery pack to take away the heat, in the present scheme, the refrigerant directly flows through the liquid cooling plate to perform heat exchange, that is, the battery pack 1 is cooled, thereby reducing the steps of heat exchange between the refrigerant and the cooling liquid, and greatly improving the refrigeration efficiency and saving energy. Moreover, compared with the traditional liquid cooling 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 short circuit and thermal runaway. In the present scheme, when the refrigerant leaks, the refrigerant can quickly evaporate, and generally does not cause the safety hazards of short circuit or thermal runaway.

[0049] In this embodiment, preferably, as shown in FIGS. 1 to 3, the energy storage cabinet further comprises a first heat exchange pipe assembly 5 and a second heat exchange pipe assembly 9; the liquid cooling plate is in communication with the heat exchanger 23 through the first heat exchange pipe assembly 5; and the liquid cooling plate is in communication with the reversing valve 22 through the second heat exchange pipe assembly 9.

[0050] According to the above-described structure, through the reasonable arrangement of the first heat exchange pipe assembly 5 and the second heat exchange pipe assembly 9, the connection of the plurality of battery packs 1 with the heat exchange unit 2 is realized, and the synchronous heat exchange such as cooling or heating of the plurality of battery packs 1 can be realized.

[0051] In this embodiment, preferably, as shown in FIGS. 1 to 3, the first heat exchange pipe assembly 5 comprises a first main pipe 51, a first merging pipe 52, and a first branch pipe 53; the first branch pipe 53 is in communication with the first main pipe 51 through the first merging pipe 52, and the first main pipe 51 is further in communication with the heat exchanger 23; and the first branch pipe 53 is in one-to-one correspondence with the liquid cooling plate and is in communication with the liquid cooling plate respectively.

[0052] Further, preferably, as shown in FIGS. 1-3, the second heat exchange pipeline assembly 9 comprises a second main pipeline 91, a second merging pipeline 92, and a second branch pipeline 93 connected with the second main pipeline 91; the second branch pipeline 93 is connected with the second main pipeline 91 through the second merging pipeline 92, and the second main pipeline 91 is also connected with the reversing valve 22; the second branch pipeline 93 is connected with the liquid cooling plate one by one.

[0053] According to the above-described structure, by designing the first branch pipeline 53 and the second branch pipeline 93 and connecting them with the inlet end and the outlet end of the liquid cooling plate respectively, it can be ensured that the refrigerant can flow into the liquid cooling plate of each battery pack 1 to perform synchronous heat exchange, and the second merging pipeline 92 and the second merging pipeline 92 respectively serve to connect each first branch pipeline 53 and each second branch pipeline 93, which helps to save pipelines and reduce the occupied space and improve the energy density; the first main pipeline 51 and the second main pipeline 91 respectively serve to connect the heat exchanger 23 and the reversing valve 22.

[0054] In this embodiment, preferably, as shown in FIGS. 1-3, the first main pipeline 51 is provided with a first stop valve assembly 3.

[0055] According to the above-described structure, when the heat exchange system has a problem, the first stop valve assembly 3 can be used to disconnect the connection between the heat exchanger 23, that is, to cut off the heat exchange system, stop the refrigerant, so that the refrigerant does not leak, facilitating the repair of the fault point.

[0056] In this embodiment, preferably, as shown in FIGS. 1-3, the first stop valve assembly 3 comprises 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.

[0057] According to the above-described structure, the first stop valve 31 and the second stop valve 32 can be disassembled, which facilitates the disassembly of the overall structure and the stop operation of the respective pipelines to avoid liquid leakage, thereby facilitating the inspection and maintenance operations.

[0058] It should be noted that two stop valves are often used for docking, that is, two stop valves are used in pairs and in docking, 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 is not described in detail here.

[0059] In this embodiment, preferably, as shown in FIGS. 1-3, any first branch pipeline 53 is provided with a second stop valve assembly 4.

[0060] According to the above-described structure, when the heat exchange system has a problem, the second stop valve assembly 4 on the first branch pipeline 53 can be used to disconnect each first branch pipeline 53 from the battery pack 1, that is, to cut off the heat exchange system and stop the refrigerant, so that the refrigerant does not leak, facilitating the repair of the fault point.

[0061] In this embodiment, preferably, as shown in FIGS. 1-3, 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.

[0062] According to the above-described structure, the third stop valve 41 and the fourth stop valve 42 can be disassembled, facilitating the disassembly of the overall structure and the stop operation of the respective pipelines to avoid liquid leakage, thereby facilitating maintenance and maintenance operations.

[0063] In this embodiment, preferably, as shown in FIGS. 1-3, any first branch pipeline 53 is provided with an electronic expansion valve 6.

[0064] According to the above-described structure, the flow of 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.

[0065] In this embodiment, preferably, as shown in FIGS. 1-3, any second branch pipeline 93 is provided with a third stop valve assembly 7.

[0066] According to the above-described structure, when the heat exchange system has a problem, the third stop valve assembly 7 on the first branch pipeline 53 can be used to disconnect each second branch pipeline 93 from the battery pack 1, that is, to cut off the heat exchange system and stop the refrigerant, so that the refrigerant does not leak, facilitating the repair of the fault point.

[0067] In this embodiment, preferably, as shown in FIGS. 1-3, 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.

[0068] According to the above-described structure, the fifth stop valve 71 and the sixth stop valve 72 can be disassembled, facilitating the disassembly of the overall structure and the stop operation of the respective pipelines to avoid liquid leakage, thereby facilitating maintenance and maintenance operations.

[0069] In this embodiment, preferably, as shown in FIGS. 1-3, the second main pipeline 91 is provided with a fourth stop valve assembly 8.

[0070] According to the above-described structure, when the heat exchange system has a problem, the fourth stop valve 42 can be used, and in cooperation with the third stop valve assembly 7 described above, the liquid cooling plate can be completely separated from the liquid cooling system, which is more secure and reliable.

[0071] In this embodiment, preferably, as shown in FIGS. 1-3, 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.

[0072] According to the above-described structure, the seventh stop valve 81 and the eighth stop valve 82 can be detached, which facilitates disassembly of the overall structure and facilitates stoppage operation of the respective pipelines to avoid liquid leakage, thereby facilitating maintenance and maintenance operations.

[0073] As can be seen, 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 used to completely separate the battery pack 1, the first heat exchange pipeline assembly 5, the second heat exchange pipeline assembly 9, and the heat exchange unit 2 into independent structures, and ensure that each section does not leak refrigerant, which is particularly convenient for maintenance or replacement of the battery pack 1.

[0074] 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 connected stop valves, but can include only one stop valve, which can be designed according to actual needs.

[0075] In this embodiment, preferably, as shown in FIGS. 1-3, the number of battery packs 1 is multiple, and at least one column of battery packs 1 is arranged along the height direction of the energy storage cabinet.

[0076] According to the above-described structure, the battery packs 1 are arranged in columns, making full use of the space in the height direction, and the integration is higher, and further, preferably, along the height direction of the energy storage cabinet and from top to bottom, the master control box 14, the electric energy conversion module 15, and the heat exchange unit 2 are sequentially arranged below the column of battery packs 1.

[0077] Further, preferably, the bottom of each battery pack 1 is provided with a liquid cooling plate, each liquid cooling plate is provided with a first sub-pipeline 53 and a second sub-pipeline 93, and when the number of liquid cooling plates is multiple, the number of first sub-pipelines 53 and second sub-pipelines 93 is multiple, and the multiple first sub-pipelines 53 share a first main pipeline 51, and the multiple second sub-pipelines 93 share a second main pipeline 91.

[0078] It should be noted that: not only limited to a column of battery packs 1 in the present application, but also for multiple battery packs 1, and each column of battery packs 1 is equipped with a first heat exchange pipe assembly 5 and a second heat exchange pipe assembly 9, and each column of first heat exchange pipe assembly 5 can be connected together through the first communication pipe, and then the first communication pipe and the heat exchanger 23 are connected together, and each column of second heat exchange pipe assembly 9 is connected together through the second communication pipe, and then the second communication pipe and the reversing valve 22 are connected together, of course, not only limited to this, but also according to the actual needs of design.

[0079] In addition, the number of battery packs 1 in the present application is not only limited to multiple, but also one, according to the actual needs of design.

[0080] 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, not only limited to this, each battery pack 1 can also be equipped with multiple liquid cooling plates, in addition, the position of the liquid cooling plate is not only limited to be set at the bottom of the battery pack 1, but also can be designed at the top or the middle position, or the side, or other positions, according to the actual needs of design.

[0081] In this embodiment, preferably, as shown in FIG. 1 to FIG. 3, the energy storage cabinet further comprises 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 exchange unit 2 are sequentially arranged below the battery pack 1.

[0082] According to the structure described above, the heat exchange unit 2 is installed at the bottom, and the main control box 14 and the electric energy conversion module 15 containing electrical elements are installed above, so that when the heat exchange unit 2 leaks, the electrical elements will not be damaged, which is more safe and reliable.

[0083] In this embodiment, preferably, as shown in FIG. 1 to FIG. 3, the energy storage cabinet further comprises a fan 10, and the fan 10 is configured to dissipate heat for the heat exchanger 23.

[0084] 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 for the heat exchanger 23 to accelerate the cooling of the refrigerant.

[0085] In this embodiment, preferably, as shown in FIG. 1 to FIG. 3, the energy storage cabinet further comprises a heating member 11, and the heating member 11 is configured to heat the heat exchanger 23.

[0086] According to the structure described above, when the low-temperature refrigerant flows through the heat exchanger 23, the outer wall of the heat exchanger 23 will frost, so the heating member 11 can be used to heat the outer wall of the heat exchanger 23 to melt the frost.

[0087] In this embodiment, preferably, as shown in FIGS. 1-3, the energy storage cabinet further comprises a water collecting container 12, and the water collecting container 12 is arranged below the heat exchanger 23; the bottom of the water collecting container 12 is connected with a drain pipe 13.

[0088] According to the above-described structure, when the outer wall of the heat exchanger 23 is heated by the heating member 11, the frost formed on the outer wall of the heat exchanger 23 melts and flows into the water collecting container 12 below, and is discharged to the outside of the energy storage cabinet through the drain pipe 13, which is more safe and reliable.

[0089] In this embodiment, preferably, as shown in FIGS. 1-3, the reversing valve 22 is a four-way reversing valve, and the reversing valve 22 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 in communication with the inlet end of the compressor 21, the second interface 222 is in communication with the liquid cooling plate, the third interface 223 is in communication with the outlet end of the compressor 21, and the fourth interface 224 is in communication with the heat exchanger 23.

[0090] According to the above-described structure, when refrigerating, 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 sequentially communicated to form a circulating refrigeration 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 sequentially communicated to form a circulating heating path.

[0091] Further preferably, the second interface 222 is provided with the aforementioned second heat exchange pipe assembly 9.

[0092] In this embodiment, preferably, as shown in FIG. 5, the energy storage cabinet further comprises a cabinet body 16, and the aforementioned battery pack 1, the main control box 14, the electric energy conversion module 15, the heat exchange unit 2, the first heat exchange pipe assembly 5 and the second heat exchange pipe assembly 9 are all arranged in the cabinet body 16.

[0093] Further preferably, the cabinet body 16 is further provided with an openable cabinet door 17 for facilitating maintenance.

[0094] In this embodiment, preferably, as shown in FIG. 5, the refrigerant can be R134a refrigerant, i.e. tetrafluoroethane refrigerant, or R410a refrigerant, i.e. hydrofluorocarbon compound mixed refrigerant, of course, not limited to this, the type of refrigerant can also be selected according to actual needs.

[0095] To sum up, the detailed process of refrigeration and heating of the heat exchange structure in the energy storage cabinet provided in the application is as follows:

[0096] When refrigeration is performed, the third interface 223 of the reversing valve 22 is in communication with the fourth interface 224 of the reversing valve 22, the second interface 222 of the reversing valve 22 is in communication with the first interface 221 of the reversing valve 22, the refrigerant flows out of the outlet end of the compressor 21, and then 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 is evaporated to absorb heat, thereby dissipating heat from the battery, and the refrigerant flows out of the liquid cooling plate after the heat exchange is completed, 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.

[0097] When heating is performed, the third interface 223 of the reversing valve 22 is in communication with the second interface 222 of the reversing valve 22, the fourth interface 224 of the reversing valve 22 is in communication with the first interface 221 of the reversing valve 22, the refrigerant flows out of the compressor 21, and then flows 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, thereby heating the battery, and the refrigerant flows out of the liquid cooling plate after the heat exchange is completed, 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.

[0098] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application. Industrial applicability

[0099] To sum up, the application provides an energy storage cabinet, the refrigerant of the application directly flows through the liquid cooling plate for heat exchange, that is, the battery pack is refrigerated, which reduces the steps of refrigerant and cooling liquid heat exchange, thereby greatly improving the refrigeration efficiency and saving energy.

Claims

1. An energy storage cabinet, characterized by, The application relates to a battery pack and a heat exchange unit, wherein the battery pack comprises a liquid cooling plate, the heat exchange unit comprises a compressor, a reversing valve and a heat exchanger, when refrigeration is performed, the compressor, the reversing valve, the heat exchanger, the liquid cooling plate, the reversing valve and the compressor are sequentially connected in communication to form a circulating refrigeration path, and refrigerant flows out of the compressor, sequentially flows through the reversing valve and the heat exchanger, and then flows into the liquid cooling plate, and the refrigerant flows out of the liquid cooling plate after heat exchange, then flows through the reversing valve, and finally flows back into the compressor. When heating is performed, the compressor, the reversing valve, the liquid cooling plate, the heat exchanger, the reversing valve and the compressor are sequentially connected in communication to form a circulating heating path, and refrigerant flows out of the compressor, then flows into the liquid cooling plate through the reversing valve, the refrigerant flows out of the liquid cooling plate after heat exchange, then sequentially flows through the heat exchanger and the reversing valve, and finally flows back into the compressor. The energy storage cabinet further comprises a first heat exchange pipe line assembly and a second heat exchange pipe line assembly; wherein the liquid cooling plate is connected in communication with the heat exchanger through the first heat exchange pipe line assembly; the liquid cooling plate is connected in communication with the reversing valve through the second heat exchange pipe line assembly.

2. The energy storage cabinet of claim 1, wherein, The first heat exchange pipe line assembly comprises a first main pipe line, a first merging pipe line and a first branch pipe line; wherein the first branch pipe line is connected in communication with the first main pipe line through the first merging pipe line, and the first main pipe line is further connected in communication with the heat exchanger; the first branch pipe line corresponds to the liquid cooling plate one by one and is connected in communication respectively.

3. The energy storage cabinet of claim 2, wherein, The first main pipe line is provided with a first stop valve assembly.

4. The energy storage cabinet of claim 3, wherein, The first stop valve assembly comprises a first stop valve and a second stop valve, and the first stop valve and the second stop valve are detachably connected.

5. The energy storage cabinet of claim 4, wherein, Any first branch pipe line is provided with a second stop valve assembly.

6. The energy storage cabinet of any one of claims 3-5, wherein, The second stop valve assembly comprises a third stop valve and a fourth stop valve, and the third stop valve and the fourth stop valve are detachably connected.

7. The energy storage cabinet of claim 6, wherein, Any first branch pipe line is provided with an electronic expansion valve.

8. The energy storage cabinet of any one of claims 3-7, wherein, The second heat exchange pipe line assembly comprises a second main pipe line, a second merging pipe line and a second branch pipe line connected in communication with the second main pipe line; wherein the second branch pipe line is connected in communication with the second main pipe line through the second merging pipe line, and the second main pipe line is further connected in communication with the reversing valve; the second branch pipe line corresponds to the liquid cooling plate one by one and is connected in communication respectively.

9. The energy storage cabinet of any one of claims 2-8, wherein, Any second branch pipe line is provided with a third stop valve assembly.

10. The energy storage cabinet of claim 9, wherein, The third stop valve assembly comprises a fifth stop valve and a sixth stop valve, and the fifth stop valve and the sixth stop valve are detachably connected.

11. The energy storage cabinet of claim 10, wherein, The second main pipe line is provided with a fourth stop valve assembly.

12. The energy storage cabinet of any one of claims 9-11, wherein, The fourth stop valve assembly comprises a sixth stop valve and a seventh stop valve, and the sixth stop valve and the seventh stop valve are detachably connected.

13. The energy storage cabinet of claim 12, wherein, The number of the battery packs is multiple, and at least one column of battery packs arranged along the height direction of the energy storage cabinet is formed; and / or 14. The energy storage cabinet of any one of claims 1-13, wherein, ​ 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 comprises a fan, and the fan is configured to dissipate heat from the heat exchanger; and / or The energy storage cabinet further comprises a heating member, and the heating member is configured to heat the heat exchanger; and / or The energy storage cabinet further comprises a water collecting container, and the water collecting container is arranged below the heat exchanger; a drain pipe is connected to the bottom of the water collecting 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 in communication with the inlet end of the compressor, the second interface is in communication with the liquid cooling plate, the third interface is in communication with the outlet end of the compressor, and the fourth interface is in communication with the heat exchanger.

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