Energy storage cabinet

Abstract

The utility model relates to an energy storage cabinet, which comprises a box body, and a refrigerator, a liquid cooling pipeline structure and a plurality of battery cabinets which are arranged in the box body, the battery cabinet comprises a shell and a battery module, a containing cavity is formed in the shell, the battery module is arranged in the containing cavity, the battery module is in direct contact with cooling liquid, a liquid inlet communicated with the containing cavity is formed in the top of the shell, and a liquid outlet communicated with the containing cavity is formed in the bottom of the shell; the liquid cooling pipeline structure comprises a liquid inlet pipeline and a liquid return pipeline, wherein the liquid inlet pipeline comprises a liquid inlet connecting pipe, a liquid inlet main pipe and a plurality of liquid inlet branch pipes. The energy storage cabinet and the liquid cooling pipeline structure are simple in structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage, and relates to an energy storage cabinet. Background Art

[0002] A liquid-cooled energy storage container is disclosed in the related art, which includes a container, multiple battery clusters and a liquid-cooling system; the multiple battery clusters are arranged in an array in the container, each battery cluster includes a plurality of battery packs arranged vertically, and each battery pack is provided with a coolant inlet and a coolant outlet; the liquid-cooling system includes a liquid-cooling unit and liquid-cooling pipelines arranged in the container, the liquid-cooling pipelines include a primary pipeline, a secondary pipeline and a tertiary pipeline, the primary pipeline is arranged at the bottom of the battery cluster, one end of the tertiary pipeline is connected to the coolant inlet and the coolant outlet of each battery pack, the other end of the tertiary pipeline is communicated with one end of the secondary pipeline, the other end of the secondary pipeline is communicated with one end of the primary pipeline, and the other end of the primary pipeline is respectively connected to the liquid inlet end and the liquid outlet end of the liquid-cooling unit.

[0003] In the liquid-cooled energy storage container in the related art, multiple sections of tertiary pipelines are required to enter each heat dissipation surface of the battery module to achieve heat dissipation, and the liquid-cooling pipelines are relatively complex. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is: aiming at the problem that in the liquid-cooled energy storage container in the related art, multiple sections of tertiary pipelines are required to enter each heat dissipation surface of the battery module to achieve heat dissipation, and the liquid-cooling pipelines are relatively complex, an energy storage cabinet is provided.

[0005] To solve the above technical problem, the utility model provides an energy storage cabinet, which includes a box body, and a refrigerator, a liquid-cooling pipeline structure and multiple battery cabinets arranged in the box body;

[0006] The battery cabinet includes a housing and a battery module, a receiving cavity is formed in the housing, the battery module is arranged in the receiving cavity, the battery module is in direct contact with the coolant, a liquid inlet is arranged at the top of the housing and communicated with the receiving cavity, and a liquid outlet is arranged at the bottom of the housing and communicated with the receiving cavity;

[0007] The liquid-cooling pipeline structure includes a liquid inlet pipeline and a liquid return pipeline, the liquid inlet pipeline includes a liquid inlet connecting pipe, a liquid inlet main pipe and multiple liquid inlet branch pipes, one end of the liquid inlet connecting pipe is connected to the coolant outlet of the refrigerator, the other end is connected to one end of the liquid inlet main pipe, one end of the liquid inlet branch pipe is connected to the liquid inlet main pipe, and the other end is connected to the liquid inlet; the liquid return pipeline includes a liquid return main pipe and multiple liquid return branch pipes, one end of the liquid return main pipe is connected to the coolant inlet of the refrigerator, one end of the liquid return branch pipe is connected to the liquid return main pipe, and the other end is connected to the liquid outlet;

[0008] The cooler is used to cool the coolant.

[0009] According to the energy storage cabinet of the embodiment of the present invention, the liquid cooling pipeline structure includes a liquid inlet pipeline and a liquid return pipeline. The liquid inlet pipeline includes a liquid inlet connecting pipe, a liquid inlet main pipe, and a plurality of liquid inlet branch pipes. The liquid return pipeline includes a liquid return main pipe and a plurality of liquid return branch pipes. The liquid inlet connecting pipe and the liquid inlet main pipe are the first-level pipelines for liquid inlet, the liquid inlet branch pipes are the second-level pipelines for liquid inlet, the liquid return main pipe is the first-level pipeline for liquid return, and the liquid return branch pipes are the second-level pipelines for liquid return. The liquid inlet and liquid return of the liquid cooling pipeline structure only have two levels of pipelines, canceling the third-level pipelines for entering each heat dissipation surface of the battery module in the prior art. The structure of the liquid cooling pipeline structure is simple and has few components, which is beneficial to later maintenance.

[0010] Optionally, the battery module is immersed in the coolant in the accommodation cavity; or,

[0011] The coolant at the liquid inlet directly contacts the battery module by spraying.

[0012] Optionally, the liquid inlet main pipe is located at the top of the box body, and the liquid return pipeline is located at the bottom of the box body.

[0013] Optionally, the other end of the liquid inlet main pipe is closed, and the other end of the liquid return main pipe is closed.

[0014] Optionally, a plurality of the liquid inlet branch pipes are arranged at intervals along the extending direction of the liquid inlet main pipe;

[0015] A plurality of the liquid return branch pipes are arranged at intervals along the extending direction of the liquid return main pipe.

[0016] Optionally, the liquid inlet main pipe is horizontally arranged, and the liquid inlet connecting pipe is vertically arranged;

[0017] The liquid return pipeline is horizontally arranged and is located directly below the liquid inlet main pipe.

[0018] Optionally, the liquid inlet connecting pipe includes a vertical connecting pipe extending along the height direction of the box body and a bottom connecting pipe extending along the width direction of the box body. One end of the bottom connecting pipe is connected to the coolant outlet of the cooler, and the other end is connected to the bottom end of the vertical connecting pipe. The top end of the vertical connecting pipe is connected to one end of the liquid inlet main pipe.

[0019] Optionally, the liquid inlet main pipe includes a first liquid inlet pipe, a second liquid inlet pipe, and a first communication pipe. The first liquid inlet pipe and the second liquid inlet pipe are spaced from each other in the width direction of the box body. One end of the first liquid inlet pipe is connected to the top end of the liquid inlet connecting pipe, and the first communication pipe is connected between the other end of the first liquid inlet pipe and the end of the second liquid inlet pipe away from the liquid inlet connecting pipe;

[0020] A plurality of the liquid inlet branch pipes are connected to the first liquid inlet pipe, and a plurality of the liquid inlet branch pipes are connected to the second liquid inlet pipe.

[0021] Optionally, the liquid return pipeline further includes a liquid return connecting pipe, one end of the liquid return connecting pipe is connected to the coolant inlet of the cooler, and the other end is connected to one end of the liquid return main pipe.

[0022] Optionally, the liquid return main pipe includes a first liquid return pipe, a second liquid return pipe and a second communication pipe. The first liquid return pipe and the second liquid return pipe are spaced apart from each other in the width direction of the box body. One end of the first liquid return pipe is connected to the other end of the liquid return connecting pipe, and the second communication pipe is connected between the other end of the first liquid return pipe and the end of the second liquid return pipe away from the liquid return connecting pipe;

[0023] A plurality of the liquid return branch pipes are connected to the first liquid return pipe, and a plurality of the liquid return branch pipes are connected to the second liquid return pipe.

[0024] Optionally, a pressure sensor is further included, and the pressure sensor is arranged on the liquid inlet connecting pipe or the liquid inlet main pipe for detecting the liquid pressure of the liquid inlet connecting pipe or the liquid inlet main pipe.

[0025] Optionally, a protection pipe, a first electromagnetic valve and a second electromagnetic valve are further included. The first electromagnetic valve is arranged on the liquid inlet connecting pipe, and the second electromagnetic valve is arranged on the liquid return connecting pipe;

[0026] By controlling the first electromagnetic valve and the second electromagnetic valve, the protection pipe can be communicated between the coolant inlet and the coolant outlet of the cooler, so that the protection pipe and the cooler form a loop.

[0027] Optionally, the first electromagnetic valve is a first three-way valve, the second electromagnetic valve is a second three-way valve. The first three-way valve has a first interface, a second interface and a third interface. The liquid inlet connecting pipe is disconnected into a first section and a second section at the first three-way valve. The first section is connected between the first interface and the coolant outlet of the cooler, and the second section is connected to the second interface. One end of the protection pipe is connected to the third interface; the second three-way valve has a fourth interface, a fifth interface and a sixth interface. The liquid return connecting pipe is connected between the fourth interface and the coolant inlet of the cooler. One end of the liquid return main pipe is connected to the fifth interface, and the other end of the protection pipe is connected to the sixth interface;

[0028] When the pressure detected by the pressure sensor is less than or equal to the preset pressure, the first interface is communicated with the second interface, and both the first interface and the second interface are blocked from the third interface. The fourth interface is communicated with the fifth interface, and both the fourth interface and the fifth interface are blocked from the sixth interface, so as to block the protection tube and the cooler.

[0029] When the pressure detected by the pressure sensor is greater than the preset pressure, the first interface is communicated with the third interface, and both the first interface and the third interface are blocked from the second interface. The fourth interface is communicated with the sixth interface, and both the fourth interface and the sixth interface are blocked from the fifth interface, so that the protection tube and the cooler are communicated to form a loop.

[0030] Optionally, the liquid inlet connecting pipe includes a vertical connecting pipe extending along the height direction of the box body and a bottom connecting pipe extending along the width direction of the box body. One end of the bottom connecting pipe is connected to the coolant outlet of the cooler, and the other end is connected to the bottom end of the vertical connecting pipe. The top end of the vertical connecting pipe is connected to one end of the liquid inlet main pipe.

[0031] The first section is the bottom connecting pipe, and the second section is the vertical connecting pipe.

[0032] Optionally, the liquid inlet branch pipe is a flexible pipe, and the liquid return branch pipe is a flexible pipe.

[0033] Optionally, a two-way stop valve is connected between the liquid inlet branch pipe and the liquid inlet of the corresponding battery cabinet, and a two-way stop valve is connected between the liquid return branch pipe and the liquid return port of the corresponding battery cabinet.

[0034] Optionally, at least one of the liquid inlet main pipe and the liquid inlet connecting pipe is provided with a first exhaust valve for exhausting the gas in the coolant in at least one of the liquid inlet main pipe and the liquid inlet connecting pipe.

[0035] Optionally, the first exhaust valve is arranged at the connection between the liquid inlet connecting pipe and the liquid inlet main pipe. Optionally, a second exhaust valve is arranged at the top of the housing for exhausting the gas inside the housing.

[0036] Optionally, the battery module includes a plurality of battery packs stacked along the height direction of the box body;

[0037] The liquid level of the coolant in the accommodation cavity is higher than the top surface of the battery module.

[0038] Optionally, the liquid inlet main pipe is fixed to the top wall of the box body, and the liquid return main pipe is fixed to the bottom wall of the box body.

[0039] Optionally, a first space is formed between the top wall of the box body and the top surfaces of the plurality of battery cabinets, and the main liquid inlet pipe is located in the first space.

[0040] Optionally, a plurality of support seats are provided on the bottom wall of the box body, and the bottom of the battery cabinet is installed on the support seats to form a second space between the bottom wall of the box body and the bottom surfaces of the plurality of battery cabinets;

[0041] The main liquid return pipe is located in the second space.

[0042] Optionally, the cooler is an air conditioner, and an electric refrigeration device, a heat exchange channel and a refrigerant circulation pipeline are provided in the air conditioner. The heat exchange channel is communicated between the coolant inlet and the coolant outlet of the cooler. The electric refrigeration device is used for refrigerating the refrigerant in the refrigerant circulation pipeline, and the refrigerated refrigerant in the refrigerant circulation pipeline exchanges heat with the coolant in the heat exchange channel to cool the coolant. Description of the Drawings

[0043] Figure 1 is a schematic diagram of an energy storage cabinet provided by an embodiment of the present invention;

[0044] Figure 2 is a schematic diagram of the liquid cooling pipeline structure of the energy storage cabinet provided by an embodiment of the present invention in the box body;

[0045] Figure 3 is Figure 2 another perspective view of

[0046] Figure 4 is a schematic diagram of the battery cabinet of the energy storage cabinet provided by an embodiment of the present invention;

[0047] Figure 5 is an exploded view of the battery cabinet of the energy storage cabinet provided by an embodiment of the present invention;

[0048] Figure 6 is a side view of the energy storage cabinet provided by an embodiment of the present invention;

[0049] Figure 7 is a schematic diagram of the liquid cooling pipeline structure provided by an embodiment of the present invention.

[0050] The reference numerals in the specification are as follows:

[0051] 1. Box body; 11. Top wall; 12. Bottom wall; 13. Support column; 14. First space; 15. Support seat; 16. Second space;

[0052] 2. Cooler;

[0053] 3. Liquid cooling pipeline structure; 31. Liquid inlet pipeline; 311. Liquid inlet connecting pipe; 3111. Vertical connecting pipe; 3112. Bottom connecting pipe; 31121. First pipe orifice; 312. Liquid inlet main pipe; 3121. First liquid inlet pipe; 3122. Second liquid inlet pipe; 3123. First communication pipe; 313. Liquid inlet branch pipe; 32. Liquid return pipeline; 321. Liquid return main pipe; 3211. First liquid return pipe; 3212. Second liquid return pipe; 3213. Second communication pipe; 322. Liquid return branch pipe; 323. Liquid return connecting pipe; 3231. Second pipe orifice;

[0054] 4. Battery cabinet; 41. Housing; 411. Housing main body; 412. Top cover; 42. Battery module; 421. Battery pack; 43. Liquid inlet; 44. Liquid outlet;

[0055] 5. Protection tube;

[0056] 6. First solenoid valve;

[0057] 7. Second solenoid valve;

[0058] 8. Two-way stop valve;

[0059] 9. First exhaust valve;

[0060] 10. Second exhaust valve. Specific embodiments

[0061] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0062] See Figures 1 to 7 , a energy storage cabinet provided by an embodiment of the present utility model includes a box body 1, and a cooler 2, a liquid cooling pipeline structure 3 and a plurality of battery cabinets 4 arranged in the box body 1; the battery cabinet 4 includes a housing 41 and a battery module 42, a receiving cavity is formed in the housing 41, the battery module 42 is arranged in the receiving cavity, the battery module 42 is in direct contact with the coolant, a liquid inlet 43 communicating with the receiving cavity is arranged at the top of the housing 41, and a liquid outlet 44 communicating with the receiving cavity is arranged at the bottom of the housing 41.

[0063] The liquid cooling pipeline structure 3 includes a liquid inlet pipeline 31 and a liquid return pipeline 32. The liquid inlet pipeline 31 includes a liquid inlet connecting pipe 311, a liquid inlet main pipe 312, and a plurality of liquid inlet branch pipes 313. One end of the liquid inlet connecting pipe 311 is connected to the coolant outlet, and the other end is connected to one end of the liquid inlet main pipe 312. One end of the liquid inlet branch pipe 313 is connected to the liquid inlet main pipe 312, and the other end is connected to the liquid inlet 43. The liquid return pipeline 32 includes a liquid return main pipe 321 and a plurality of liquid return branch pipes 322. One end of the liquid return main pipe 321 is connected to the coolant inlet, one end of the liquid return branch pipe 322 is connected to the liquid return main pipe 321, and the other end is connected to the liquid outlet 44.

[0064] The cooler 2 is used to cool the coolant. When the coolant flows through the battery cabinet 4, it takes away the heat of the battery module 42. Each battery cabinet 4 enters the liquid return main pipe 321 through a plurality of liquid return branch pipes 322, and then enters the cooler 2 through the coolant inlet. The cooler 2 cools the coolant, and the cooled coolant then flows into the liquid inlet main pipe 312 from the coolant outlet of the cooler 2 and the liquid inlet connecting pipe 311. The liquid inlet main pipe 312 distributes it to each liquid inlet branch pipe 313, so as to enter each battery cabinet 4, realizing the circulating heat dissipation of the battery module 42 in the battery cabinet 4.

[0065] In the energy storage cabinet according to the embodiment of the present invention, the liquid inlet connecting pipe 311 and the liquid inlet main pipe 312 are the first-level pipelines for liquid inlet, the liquid inlet branch pipe 313 is the second-level pipeline for liquid inlet, the liquid return main pipe 321 is the first-level pipeline for liquid return, and the liquid return branch pipe 322 is the second-level pipeline for liquid return. Both the liquid inlet and liquid return of the liquid cooling pipeline structure 3 only have two levels of pipelines, canceling the third-level pipelines for each heat dissipation surface entering the battery module in the prior art. The liquid cooling pipeline structure 3 has a simple structure and few components, which is beneficial to later maintenance and repair.

[0066] In addition, the liquid inlet of the battery cabinet 4 is arranged at the top of the housing 41, and the liquid outlet of the battery cabinet 4 is arranged at the bottom of the housing 41. In this way, the battery cabinet 4 adopts the method of inlet at the top and outlet at the bottom, which can ensure the flow rate of the coolant in the battery cabinet 4, can quickly take away the heat of the battery module 42 in the battery cabinet 4, and has a good heat dissipation effect. Moreover, the liquid cooling pipeline structure 3 is not easily blocked.

[0067] A heat exchange channel is arranged in the cooler 2, and the heat exchange channel is communicated between the coolant inlet and the coolant outlet of the cooler.

[0068] In an embodiment, the liquid inlet main pipe 312 is located at the top of the box body 1, and the liquid return pipeline 32 is located at the bottom of the box body 1. The liquid inlet main pipe 312 is arranged close to the liquid inlet of the battery cabinet 4, which can reduce the length of the liquid inlet branch pipe. The liquid return pipeline 3 is arranged close to the liquid outlet of the battery cabinet 4, which can reduce the length of the liquid return branch pipe 322.

[0069] In one embodiment, the battery module 42 is immersed in the coolant in the accommodation cavity. That is, the battery cabinet 4 is a submerged battery cabinet 4.

[0070] In other embodiments, the coolant at the liquid inlet 43 directly contacts the battery module 42 by means of spraying. A spraying device can be added during this process. The spraying device sprays the outer surface of the battery module 42 to take away the heat of the battery module 42, and the sprayed coolant flows out from the liquid outlet 44 by gravity.

[0071] In one embodiment, the other end of the liquid inlet main pipe 312 is closed to prevent the coolant from leaking from the liquid inlet main pipe 312; the other end of the liquid return main pipe 321 is closed to prevent the coolant from leaking from the liquid return main pipe 321.

[0072] In one embodiment, referring to Figure 7 ..., a plurality of the liquid inlet branch pipes 313 are arranged at intervals along the extending direction of the liquid inlet main pipe 312. More preferably, a plurality of the liquid inlet branch pipes 313 are arranged at equal intervals along the extending direction of the liquid inlet main pipe 312.

[0073] In one embodiment, referring to Figure 7 ..., a plurality of the liquid return branch pipes 322 are arranged at intervals along the extending direction of the liquid return main pipe 321. More preferably, a plurality of the liquid return branch pipes 322 are arranged at equal intervals along the extending direction of the liquid return main pipe 321.

[0074] In one embodiment, the distance between two adjacent liquid inlet branch pipes 313 is equal to the distance between two adjacent liquid return branch pipes 322, and the distance between two adjacent liquid inlet branch pipes 313 is substantially the same as the distance between two adjacent battery cabinets 4 along the length direction of the box body 1.

[0075] In one embodiment, referring to Figure 7 ..., the liquid inlet main pipe 312 is horizontally arranged, and the liquid inlet connecting pipe 311 is vertically arranged; the liquid return pipeline 32 is horizontally arranged and is located directly below the liquid inlet main pipe 312.

[0076] In one embodiment, referring to Figure 7 ..., the liquid inlet connecting pipe 311 includes a vertical connecting pipe 3111 extending along the height direction of the box body 1 and a bottom connecting pipe 3112 extending along the width direction of the box body 1. One end of the bottom connecting pipe 3112 is connected to the coolant outlet of the cooler 2, the other end is connected to the bottom end of the vertical connecting pipe 3111, and the top end of the vertical connecting pipe 3111 is connected to one end of the liquid inlet main pipe 312. One end of the bottom connecting pipe 3112 has a first pipe orifice 31121 connected to the coolant outlet of the cooler 2.

[0077] In one embodiment, referring to Figure 2 and Figure 3 , the main liquid inlet pipe 312 is fixed to the top wall 11 of the box body 1, and the main liquid return pipe 322 is fixed to the bottom wall 12 of the box body 1. The bottom connecting pipe 3112 is fixed to the bottom wall of the box body 1, and the vertical connecting pipe 3111 is fixed to the side wall of the box body 1. In this way, the liquid cooling pipeline structure 3 is stably connected to the box body 1, avoiding loosening of the liquid cooling pipeline structure 3. The fixing in this article can be in ways such as bolt connection, screw connection, snap connection, welding, and gluing.

[0078] In one embodiment, referring to Figure 2 and Figure 3 , a plurality of support columns 13 are arranged in the box body 1, and the support columns are fixedly connected between the top wall 11 and the bottom wall 12 of the box body 1 to enhance the overall strength of the box body 1.

[0079] In one embodiment, referring to Figure 6 , a first space 14 is formed between the top wall 11 of the box body 1 and the top surfaces of the plurality of battery cabinets 4, and the main liquid inlet pipe 312 is located in the first space 14. In this way, the main liquid inlet pipe 312 is located above the plurality of battery cabinets 4, making full use of the height space of the box body 1 and enabling better fixing of the main liquid inlet pipe 312 to the top wall 11 of the box body 1.

[0080] In one embodiment, referring to Figure 1 and Figure 6 , a plurality of support seats 15 are arranged on the bottom wall 12 of the box body 1, and the bottom of the battery cabinet 4 is installed on the support seats 15 to form a second space 16 between the bottom wall 12 of the box body 1 and the bottom surfaces of the plurality of battery cabinets 4; the main liquid return pipe 321 is located in the second space 16. In this way, the main liquid return pipe 321 is located below the plurality of battery cabinets 4, making full use of the height space of the box body 1 and enabling better fixing of the main liquid return pipe 321 to the top wall 11 of the box body 1.

[0081] The main liquid inlet pipe 312 is arranged above the battery cabinet 4, and the main liquid return pipe 321 is arranged below the battery cabinet 4, without entering the battery cabinet 4. The arrangement is simple and reliable, and is easy to overhaul and maintain.

[0082] In one embodiment, referring to Figure 7, the liquid inlet main pipe 312 includes a first liquid inlet pipe 3121, a second liquid inlet pipe, and a first connecting pipe 3123. The first liquid inlet pipe 3121 and the second liquid inlet pipe 3122 are spaced from each other in the width direction of the box body 1. One end of the first liquid inlet pipe 3121 is connected to the top end of the liquid inlet connecting pipe 311, and the first connecting pipe 3123 is connected between the other end of the first liquid inlet pipe 3121 and the end of the second liquid inlet pipe 3122 away from the liquid inlet connecting pipe 311. That is, the liquid inlet main pipe 312 is generally U-shaped. Along the height direction of the box body 1, the first liquid inlet pipe 3121 and the second liquid inlet pipe 3122 are arranged side by side above the combination composed of all the battery cabinets 4. Along the length direction of the box body 1, the first connecting pipe 3123 is located on the side of the combination composed of all the battery cabinets 4 away from the liquid inlet connecting pipe 311. A plurality of the liquid inlet branch pipes 313 are connected to the first liquid inlet pipe 3121, and a plurality of the liquid inlet branch pipes 313 are connected to the second liquid inlet pipe 3122. Correspondingly, the battery cabinets 4 are arranged in two rows, and each row of battery cabinets 4 includes a plurality of battery cabinets 4 spaced in the length direction of the box body 1. In this way, the capacity of the energy storage cabinet can be increased.

[0083] In one embodiment, refer to Figure 7 , the liquid return pipeline 32 further includes a liquid return connecting pipe 323. One end of the liquid return connecting pipe 323 is connected to the coolant inlet of the cooler 2, and the other end is connected to one end of the liquid return main pipe 321. One end of the liquid return connecting pipe 323 has a second pipe orifice 3231 connected to the coolant inlet of the cooler 2.

[0084] In one embodiment, refer to Figure 7 , the liquid return main pipe 321 includes a first liquid return pipe 3211, a second liquid return pipe 3212, and a second connecting pipe 3213. The first liquid return pipe 3211 and the second liquid return pipe 3212 are spaced from each other in the width direction of the box body 1. One end of the first liquid return pipe 3211 is connected to the other end of the liquid return connecting pipe 323, and the second connecting pipe 3213 is connected between the other end of the first liquid return pipe 3211 and the end of the second liquid return pipe 3212 away from the liquid return connecting pipe 323. That is, the liquid return main pipe 321 is generally U-shaped. Along the height direction of the box body 1, the first liquid return pipe 3211 and the second liquid return pipe 3212 are arranged below the combination composed of all the battery cabinets 4. Along the length direction of the box body 1, the second connecting pipe 3213 is located on the side of the combination composed of all the battery cabinets 4 away from the liquid outlet connecting pipe 323. A plurality of the liquid return branch pipes 322 are connected to the first liquid return pipe 3211, and a plurality of the liquid return branch pipes 322 are connected to the second liquid return pipe 3212. Correspondingly, the battery cabinets 4 are arranged in two rows, and each row of battery cabinets 4 includes a plurality of battery cabinets 4 spaced in the length direction of the box body 1. In this way, the capacity of the energy storage cabinet can be increased.

[0085] In one embodiment, a pressure sensor is further included. The pressure sensor is disposed on the liquid inlet connecting pipe 311 or the main liquid inlet pipe 312 to detect the liquid pressure of the liquid inlet connecting pipe 311 or the main liquid inlet pipe 312.

[0086] In one embodiment, referring to Figure 1 and Figure 7 , a protection pipe 5, a first solenoid valve 6 and a second solenoid valve 7 are further included. The first solenoid valve 6 is disposed on the liquid inlet connecting pipe 311, and the second solenoid valve 7 is disposed on the liquid return connecting pipe 323. By controlling the first solenoid valve 6 and the second solenoid valve 7, the protection pipe 5 can be connected between the coolant inlet and the coolant outlet of the refrigerator, so that a heat exchange channel of the protection pipe 5 and the refrigerator 2 forms a loop. That is, the refrigerator 2 can be short-circuited, and the refrigerator 2 is no longer connected to the main liquid inlet pipe 312 and the main liquid return pipe 321. For example, when the liquid cooling pipeline structure is blocked, resulting in an increase in the pressure of the liquid cooling pipeline structure, the pressure sensor will send a signal to the control system, and the control system controls the working states of the first solenoid valve 6 and the second solenoid valve 7, so that the coolant outlet of the refrigerator 2 is blocked from the main liquid inlet pipe 312, and the coolant inlet of the refrigerator 2 is blocked from the main liquid return pipe 321. The coolant for refrigeration by the refrigerator 2 circulates in the loop formed by the heat exchange channel of the protection pipe 5 and the refrigerator 2, reducing the influence of the too-high pressure of the liquid cooling pipeline structure 3 on the refrigerator 2.

[0087] In one embodiment, the first solenoid valve 6 is a first three-way valve, and the second solenoid valve 7 is a second three-way valve. The first three-way valve has a first interface, a second interface and a third interface. The liquid inlet connecting pipe 311 is disconnected into a first section and a second section at the first three-way valve. The first section is connected between the first interface and the coolant outlet of the refrigerator 2, and the second section is connected to the second interface. One end of the protection pipe 5 is connected to the third interface. The second three-way valve has a fourth interface, a fifth interface and a sixth interface. The liquid return connecting pipe 323 is connected between the fourth interface and the coolant inlet of the refrigerator 2. One end of the main liquid return pipe 321 is connected to the fifth interface, and the other end of the protection pipe 5 is connected to the sixth interface.

[0088] When the pressure detected by the pressure sensor is less than or equal to the preset pressure, the first interface is communicated with the second interface, and both the first interface and the second interface are blocked from the third interface. The fourth interface is communicated with the fifth interface, and both the fourth interface and the fifth interface are blocked from the sixth interface to block the heat exchange channel between the protection pipe 5 and the refrigerator 2. At this time, the coolant flows from the main liquid return pipe 321 through the second three-way valve into the refrigerator 2. After the coolant is cooled, the coolant flows out of the refrigerator 2 and into the main liquid inlet pipe 312 through the first three-way valve.

[0089] When the pressure detected by the pressure sensor is greater than the preset pressure, the first interface communicates with the third interface, and both the first interface and the third interface are blocked from the second interface. The fourth interface communicates with the sixth interface, and both the fourth interface and the sixth interface are blocked from the fifth interface, so that the heat exchange channel between the protection tube 5 and the cooler 2 forms a loop.

[0090] In one embodiment, the first section is the bottom connecting pipe 3112, and the second section is the vertical connecting pipe 3111.

[0091] In one embodiment, the liquid inlet branch pipe 313 is a flexible hose that can be bent, facilitating the connection of the liquid inlet branch pipe 313 to the liquid inlet 43 on the battery cabinet 4. The liquid return branch pipe 322 is a flexible hose that can be bent, facilitating the connection of the liquid outlet branch pipe 322 to the liquid outlet 44 on the battery cabinet 4.

[0092] In one embodiment, see Figure 6 and Figure 7 , a two-way stop valve 7 is connected between the liquid inlet branch pipe 313 and the corresponding liquid inlet 43 of the battery cabinet 4. The two-way stop valve 7 has a male end 71 and a female end 72. The female end 72 is connected to the liquid inlet 43 of the battery cabinet 4, and the male end 71 is connected to the liquid inlet branch pipe 313. The male end 71 is pluggably inserted into the female end 72. In this way, when the male end 71 on the liquid inlet branch pipe 313 is pulled out from the female end 72 on the liquid inlet 43, both the male end 71 and the female end 72 can be selected to be closed. In this way, the coolant will not flow out of the liquid inlet branch pipe 313, and the coolant will not flow out of the liquid inlet 43 of the battery cabinet 4 either, achieving a cut-off flow. During maintenance, there is no need to pump out the liquid and then disconnect the pipeline, facilitating inspection and maintenance.

[0093] Similarly, a two-way stop valve 7 is connected between the liquid return branch pipe 322 and the corresponding liquid return port 44 of the battery cabinet 4. The two-way stop valve 7 has a male end 71 and a female end 72. The female end 72 is connected to the liquid outlet 44 of the battery cabinet 4, and the male end 71 is connected to the liquid return branch pipe 322. The male end 71 is pluggably inserted into the female end 72. In this way, when the male end 71 on the liquid return branch pipe 313 is pulled out from the female end 72 on the liquid outlet 44, both the male end 71 and the female end 72 can be selected to be closed. In this way, the coolant will not flow out of the liquid return branch pipe 322, and the coolant will not flow out of the liquid outlet 44 of the battery cabinet 4 either, achieving a cut-off flow. During maintenance, there is no need to pump out the liquid and then disconnect the pipeline, facilitating inspection and maintenance.

[0094] In one embodiment, see Figure 7, at least one of the main liquid inlet pipe 312 and the liquid inlet connecting pipe 311 is provided with a first exhaust valve 9 for discharging the gas in the coolant in at least one of the main liquid inlet pipe 312 and the liquid inlet connecting pipe 311. In this way, the gas can be discharged before the coolant enters the liquid inlet branch pipe 313, preventing the gas from entering the battery cabinet 4.

[0095] For the immersion cooling of the battery cabinet 4, if there is air in the liquid cooling pipeline structure 3 or in the battery cabinet 4, it will cause the air in the liquid cooling pipeline structure 3 to block and reduce the flow rate, or the top of the battery module 42 is not submerged by the coolant, which easily leads to poor heat dissipation effect.

[0096] In this application, the gas is discharged before the coolant enters the liquid inlet branch pipe 313, preventing the gas from entering the battery cabinet 4. As a result, the air in the liquid cooling pipeline structure 3 is discharged and not brought into the battery cabinet 4, and the top of the battery module 42 is submerged by the coolant, achieving good heat dissipation effect.

[0097] In one embodiment, referring to Figure 7 , the first exhaust valve 9 is provided at the connection between the liquid inlet connecting pipe 311 and the main liquid inlet pipe 312. The discharge port of the first exhaust valve 9 faces upward.

[0098] In one embodiment, referring to Figure 4 , a second exhaust valve 10 is provided at the top of the housing 41 for discharging the gas inside the housing.

[0099] In this way, the gas in the liquid inlet pipeline 31 is discharged through the first exhaust valve 9, and the gas in the battery cabinet 4 is discharged through the second exhaust valve 10. In this way, the cooling liquid in the battery cabinet 4 has discharged the gas before flowing into the return liquid pipeline 32, and there is no gas in the coolant in the return liquid pipeline 32, achieving gas-liquid separation, and the coolant flowing back to the cooler no longer contains gas.

[0100] In one embodiment, referring to Figure 4 and Figure 5 , the housing 41 includes a housing main body 411 and a top cover 412. The housing main body 411 is in the shape of a square barrel, and the top cover 412 is sealingly connected to the top opening of the housing main body 411. The second exhaust valve 10 is provided on the top cover 412, the liquid inlet 43 is located at the top of one side wall of the housing main body 411, and the liquid outlet 44 is located at the bottom of one side wall of the housing main body 411.

[0101] In one embodiment, referring to Figure 5 , the battery module 42 includes a plurality of battery packs 421 stacked along the height direction of the box body; the liquid level of the coolant in the accommodation cavity is higher than the top surface of the battery module 42.

[0102] In one embodiment, the cooler is an air conditioner, which is provided with an electric refrigeration device, a heat exchange channel and a refrigerant circulation pipeline. The heat exchange channel is connected between the coolant inlet and the coolant outlet of the cooler. The electric refrigeration device is used for refrigerating the refrigerant in the refrigerant circulation pipeline, and the refrigerated refrigerant in the refrigerant circulation pipeline exchanges heat with the coolant in the heat exchange channel to cool the coolant.

[0103] Of course, in other embodiments, other forms of coolers may also be used. For example, a thermoelectric cooler. The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A energy storage cabinet, characterized in that, It includes a box body, as well as a refrigerator, a liquid cooling pipeline structure and a plurality of battery cabinets arranged in the box body; The battery cabinet includes a housing and a battery module. An accommodation cavity is formed in the housing. The battery module is arranged in the accommodation cavity. The battery module is in direct contact with the coolant. A liquid inlet communicating with the accommodation cavity is arranged at the top of the housing, and a liquid outlet communicating with the accommodation cavity is arranged at the bottom of the housing; The liquid cooling pipeline structure includes a liquid inlet pipeline and a liquid return pipeline. The liquid inlet pipeline includes a liquid inlet connecting pipe, a liquid inlet main pipe and a plurality of liquid inlet branch pipes. One end of the liquid inlet connecting pipe is connected to the coolant outlet of the refrigerator, and the other end is connected to one end of the liquid inlet main pipe. One end of the liquid inlet branch pipe is connected to the liquid inlet main pipe, and the other end is connected to the liquid inlet; The liquid return pipeline includes a liquid return main pipe and a plurality of liquid return branch pipes. One end of the liquid return main pipe is connected to the coolant inlet of the refrigerator, one end of the liquid return branch pipe is connected to the liquid return main pipe, and the other end is connected to the liquid outlet; The refrigerator is used to cool the coolant.

2. The energy storage cabinet according to claim 1, wherein, The battery module is immersed in the coolant in the accommodation cavity; or The coolant at the liquid inlet directly contacts the battery module by spraying.

3. The energy storage cabinet according to claim 1, characterized in that, The liquid inlet main pipe is located at the top of the box body, and the liquid return pipeline is located at the bottom of the box body.

4. The energy storage cabinet according to claim 1, characterized in that The other end of the liquid inlet main pipe is closed, and the other end of the liquid return main pipe is closed.

5. The energy storage cabinet according to claim 1, wherein A plurality of the liquid inlet branch pipes are arranged at intervals along the extending direction of the liquid inlet main pipe; A plurality of the liquid return branch pipes are arranged at intervals along the extending direction of the liquid return main pipe.

6. The energy storage cabinet according to claim 1, wherein, The liquid inlet main pipe is horizontally arranged, and the liquid inlet connecting pipe is vertically arranged; The liquid return pipeline is horizontally arranged and is located directly below the liquid inlet main pipe.

7. The energy storage cabinet according to claim 1, wherein, The liquid inlet connecting pipe includes a vertical connecting pipe extending along the height direction of the box body and a bottom connecting pipe extending along the width direction of the box body. One end of the bottom connecting pipe is connected to the coolant outlet of the refrigerator, and the other end is connected to the bottom end of the vertical connecting pipe. The top end of the vertical connecting pipe is connected to one end of the liquid inlet main pipe.

8. The energy storage cabinet according to claim 1, characterized in that, The liquid inlet main pipe includes a first liquid inlet pipe, a second liquid inlet pipe and a first communication pipe. The first liquid inlet pipe and the second liquid inlet pipe are spaced from each other in the width direction of the box body. One end of the first liquid inlet pipe is connected to the top end of the liquid inlet connecting pipe, and the first communication pipe is connected between the other end of the first liquid inlet pipe and the end of the second liquid inlet pipe far from the liquid inlet connecting pipe; A plurality of the liquid inlet branch pipes are connected to the first liquid inlet pipe, and a plurality of the liquid inlet branch pipes are connected to the second liquid inlet pipe.

9. The energy storage cabinet according to claim 1, wherein, The liquid return pipeline further includes a liquid return connecting pipe. One end of the liquid return connecting pipe is connected to the coolant inlet of the refrigerator, and the other end is connected to one end of the liquid return main pipe.

10. The energy storage cabinet according to claim 9, wherein The liquid return main pipe includes a first liquid return pipe, a second liquid return pipe and a second communication pipe. The first liquid return pipe and the second liquid return pipe are spaced from each other in the width direction of the box body. One end of the first liquid return pipe is connected to the other end of the liquid return connecting pipe, and the second communication pipe is connected between the other end of the first liquid return pipe and the end of the second liquid return pipe far from the liquid return connecting pipe; A plurality of the liquid return branch pipes are connected to the first liquid return pipe, and a plurality of the liquid return branch pipes are connected to the second liquid return pipe.

11. The energy storage cabinet according to claim 9, wherein It further includes a pressure sensor which is arranged on the liquid inlet connecting pipe or the main liquid inlet pipe for detecting the liquid pressure of the liquid inlet connecting pipe or the main liquid inlet pipe.

12. The energy storage cabinet according to claim 11, wherein, It further includes a protection pipe, a first electromagnetic valve and a second electromagnetic valve. The first electromagnetic valve is arranged on the liquid inlet connecting pipe, and the second electromagnetic valve is arranged on the liquid return connecting pipe. By controlling the first electromagnetic valve and the second electromagnetic valve, the protection pipe can be communicated between the coolant inlet and the coolant outlet of the cooler so that a loop is formed between the protection pipe and the cooler.

13. The energy storage cabinet according to claim 12, wherein, The first electromagnetic valve is a first three-way valve, and the second electromagnetic valve is a second three-way valve. The first three-way valve has a first interface, a second interface and a third interface. The liquid inlet connecting pipe is disconnected into a first section and a second section at the first three-way valve. The first section is connected between the first interface and the coolant outlet of the cooler, and the second section is connected to the second interface. One end of the protection pipe is connected to the third interface. The second three-way valve has a fourth interface, a fifth interface and a sixth interface. The liquid return connecting pipe is connected between the fourth interface and the coolant inlet of the cooler. One end of the main liquid return pipe is connected to the fifth interface, and the other end of the protection pipe is connected to the sixth interface. When the pressure detected by the pressure sensor is less than or equal to the preset pressure, the first interface is communicated with the second interface, and both the first interface and the second interface are blocked from the third interface. The fourth interface is communicated with the fifth interface, and both the fourth interface and the fifth interface are blocked from the sixth interface to block the protection pipe from the cooler. When the pressure detected by the pressure sensor is greater than the preset pressure, the first interface is communicated with the third interface, and both the first interface and the third interface are blocked from the second interface. The fourth interface is communicated with the sixth interface, and both the fourth interface and the sixth interface are blocked from the fifth interface so that the protection pipe is communicated with the cooler to form a loop.

14. The energy storage cabinet according to claim 13, wherein The liquid inlet connecting pipe includes a vertical connecting pipe extending along the height direction of the box body and a bottom connecting pipe extending along the width direction of the box body. One end of the bottom connecting pipe is connected to the coolant outlet of the cooler, and the other end is connected to the bottom end of the vertical connecting pipe. The top end of the vertical connecting pipe is connected to one end of the main liquid inlet pipe. The first section is the bottom connecting pipe, and the second section is the vertical connecting pipe.

15. The energy storage cabinet according to claim 1, characterized in that, The liquid inlet branch pipe is a flexible pipe, and the liquid return branch pipe is a flexible pipe.

16. The energy storage cabinet according to claim 1, characterized in that, A two-way stop valve is connected between the liquid inlet branch pipe and the liquid inlet of the corresponding battery cabinet, and a two-way stop valve is connected between the liquid return branch pipe and the liquid return port of the corresponding battery cabinet.

17. The energy storage cabinet according to claim 1, characterized in that, At least one of the main liquid inlet pipe and the liquid inlet connecting pipe is provided with a first exhaust valve for exhausting the gas in the coolant in at least one of the main liquid inlet pipe and the liquid inlet connecting pipe.

18. The energy storage cabinet according to claim 17, wherein, The first exhaust valve is arranged at the connection between the liquid inlet connecting pipe and the main liquid inlet pipe.

19. The energy storage cabinet according to claim 1, characterized in that, A second exhaust valve is provided at the top of the housing for exhausting the gas inside the housing.

20. The energy storage cabinet according to claim 1, characterized in that, The battery module includes a plurality of battery packs stacked along the height direction of the box body, and the battery module is immersed in the coolant in the accommodation cavity; The liquid level of the coolant in the accommodation cavity is higher than the top surface of the battery module.

21. The energy storage cabinet according to claim 1, characterized in that, The liquid inlet main pipe is fixed to the top wall of the box body, and the liquid return main pipe is fixed to the bottom wall of the box body.

22. The energy storage cabinet according to claim 21, wherein, A first space is formed between the top wall of the box body and the top surfaces of the plurality of battery cabinets, and the liquid inlet main pipe is located in the first space.

23. The energy storage cabinet according to claim 21, wherein, A plurality of support seats are provided on the bottom wall of the box body, and the bottom of the battery cabinet is mounted on the support seats to form a second space between the bottom wall of the box body and the bottom surfaces of the plurality of battery cabinets; The liquid return main pipe is located in the second space.

24. The energy storage cabinet according to claim 1, characterized in that, The cooler is an air conditioner, and the air conditioner is provided with an electric refrigeration device, a heat exchange channel and a refrigerant circulation pipeline. The heat exchange channel is communicated between the coolant inlet and the coolant outlet of the cooler. The electric refrigeration device is used for refrigerating the refrigerant in the refrigerant circulation pipeline. The refrigerated refrigerant in the refrigerant circulation pipeline exchanges heat with the coolant in the heat exchange channel to cool the coolant.

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