Energy storage container

Abstract

The utility model discloses a kind of energy storage container equipment, including box, box includes battery compartment and electrical compartment, battery compartment includes several sub-battery compartments arranged along first direction, equipment box and battery pack are provided in each sub-battery compartment, electrical compartment is provided with liquid cooling unit, further include the electrical cooling system for the cooling of equipment box, electrical cooling system sets up the pipeline of containing cooling medium, including first main liquid inlet pipe and first main liquid return pipe, first main liquid inlet pipe and first main liquid return pipe are communicated by being set up with several shunt pipelines in parallel, shunt pipeline is correspondingly set with equipment box, shunt pipeline and equipment box heat exchange contact, first main liquid inlet pipe and first main liquid return pipe are communicated with the first heat exchanger of liquid cooling unit in air cooling.In the utility model, the temperature of battery compartment is reduced by the heat of equipment box, and the service life of battery pack in battery compartment is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of energy storage device technology, and in particular to an energy storage container device. Background Technology

[0002] Energy storage containerized equipment is a modular energy storage device based on electrochemical energy storage technology, integrating a battery system within a container. It features large capacity, high efficiency, and flexible deployment, making it widely adaptable to various scenarios such as thermal, wind, and solar power plants, as well as islands and factories. It provides crucial support for renewable energy consumption, grid peak shaving, and load characteristic regulation. Energy storage containerized equipment comprises multiple sub-battery compartments, each containing an equipment box. The electronic components within these equipment boxes generate significant heat. In existing technologies, cooling fans are installed within the equipment box to dissipate heat from the electronic components through air cooling. However, these cooling fans transfer heat into the battery compartment, failing to utilize the cooling capacity of the battery pack within the compartment. Utility Model Content

[0003] In view of this, the present invention provides an energy storage container that solves the problem of excessive heat in the equipment box causing the battery compartment temperature to rise, reduces the temperature inside the battery compartment, and extends the service life of the battery pack inside the battery compartment.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An energy storage container includes a housing, which comprises a battery compartment and an electrical compartment. The battery compartment includes several sub-battery compartments arranged along a first direction. Each sub-battery compartment contains an equipment box and a battery pack. The electrical compartment contains a liquid cooling unit and also includes an electrical cooling system for cooling the equipment box. The electrical cooling system has pipelines for containing cooling medium, including a first main liquid inlet pipe and a first main liquid return pipe. The first main liquid inlet pipe and the first main liquid return pipe are connected by several parallel branch pipes. The branch pipes are corresponding to the equipment box and have heat exchange contact with the equipment box. The first main liquid inlet pipe and the first main liquid return pipe are connected to an air-cooled first heat exchanger in the liquid cooling unit.

[0006] As can be seen from the above technical solution, the energy storage container provided by this utility model, through the setting of an electrical cooling system for cooling the equipment box, includes a first main liquid inlet pipe, a first main liquid return pipe, and branch pipes connected in series. The branch pipes are correspondingly arranged with the equipment box and have heat exchange contact with the equipment box, thereby achieving heat exchange and cooling of the equipment box. By setting up an electrical cooling system for cooling the equipment box, the temperature of the equipment box is reduced, preventing excessive heat from the equipment box from dissipating into the battery compartment, solving the problem of the temperature rise in the battery compartment caused by the heat of the equipment box, reducing the temperature inside the battery compartment, and extending the service life of the battery pack inside the battery compartment. The first main liquid inlet pipe and the first main liquid return pipe are connected to an air-cooled first heat exchanger, and the cooling medium is cooled by air-cooling heat exchange, which improves the heat exchange efficiency and has a good heat exchange effect. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 A schematic diagram of the structure of the energy storage container provided in this embodiment of the present invention, after removing the container door, at one angle;

[0009] Figure 2 A schematic diagram of the energy storage container provided in this embodiment of the present invention, taken from another angle after the container door has been removed;

[0010] Figure 3 A schematic diagram of the electrical cooling system and battery liquid cooling system (including a liquid cooling plate) provided in an embodiment of this utility model from one angle;

[0011] Figure 4 Another structural schematic diagram of the electrical cooling system and battery liquid cooling system provided in the embodiments of this utility model;

[0012] Figure 5 Another structural schematic diagram of the electrical cooling system and battery liquid cooling system provided in the embodiments of this utility model;

[0013] Figure 6 A schematic diagram of the electrical cooling system provided in an embodiment of this utility model from one angle;

[0014] Figure 7 A schematic diagram illustrating the connection between the electrical cooling system and the liquid cooling unit provided in this embodiment of the utility model;

[0015] Figure 8 A schematic diagram of the electrical cooling system (excluding branch circuits) provided in an embodiment of this utility model from one angle;

[0016] Figure 9 A schematic diagram of the electrical cooling system (excluding branch circuits) provided in an embodiment of this utility model from another angle;

[0017] Figure 10 A structural schematic diagram of the electrical cooling system (excluding branch circuits) provided in an embodiment of this utility model from another angle;

[0018] Figure 11 A schematic diagram of the structure of the battery pack and equipment box placed on the battery support frame according to an embodiment of the present utility model;

[0019] Figure 12 A schematic diagram of the battery liquid cooling system provided in an embodiment of this utility model from one angle;

[0020] Figure 13 This is a schematic diagram of the battery liquid cooling system provided in an embodiment of the present invention from another angle;

[0021] Figure 14 Another structural schematic diagram of the battery liquid cooling system provided in an embodiment of this utility model;

[0022] Figure 15 A schematic diagram of the arrangement structure of the liquid cooling plate in the sub-battery compartment provided in an embodiment of this utility model;

[0023] Figure 16 This is a schematic diagram of the arrangement structure of the liquid cooling plate and battery pack provided in an embodiment of the present utility model.

[0024] in:

[0025] 1. Box body,

[0026] 2. Battery compartment

[0027] 201. Sub-battery compartment; 2011. Battery pack; 2012. Equipment box.

[0028] 3. Electrical warehouse,

[0029] 301. Liquid-cooled unit,

[0030] 4. Electrical cooling system,

[0031] 401. First main inlet pipe; 402. First main return pipe; 403. First branch inlet pipe; 404. Second branch inlet pipe; 405. First branch return pipe; 406. Second branch return pipe; 407. First branch circuit; 408. Second branch circuit.

[0032] 5. Battery liquid cooling system,

[0033] 501. Liquid cooling plate; 502. Second main liquid inlet pipe; 503. Second main liquid return pipe; 504. Liquid inlet branch pipe; 505. Liquid outlet branch pipe.

[0034] 6. Battery support frame,

[0035] 601. Support wing plate,

[0036] 7. Vent valve. Detailed Implementation

[0037] This utility model discloses an energy storage container that solves the problem of excessive heat in the equipment box causing the battery compartment temperature to rise, thereby reducing the temperature inside the battery compartment and extending the service life of the battery pack inside the battery compartment.

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] A battery pack consists of multiple battery packs, and typically one or more battery packs can be contained in a battery compartment. Each battery pack contains a group of individual battery cells connected in series, which have the same voltage and capacity, and together they form a complete battery system.

[0040] A battery pack comprises a battery array consisting of multiple battery cells connected in series and / or parallel, a battery management system (BMS), a thermal management system, an electrical connection system (high-voltage / low-voltage connectors, wiring harnesses, etc.), structural components (casing, brackets, etc.), and protective parts. These components are housed within a casing and sealed with a cover, forming a complete functional unit capable of directly outputting electrical energy. The battery pack, as a rechargeable battery, is the power source for new energy vehicles. The battery pack includes a casing and multiple battery cells housed within it. The battery array, composed of multiple battery cells connected in series and / or parallel, is placed within a casing and sealed with a cover, forming a battery pack capable of directly outputting electrical energy.

[0041] A battery cell can store chemical energy and controllably convert it into electrical energy. In recyclable battery cells, the active materials can be reactivated by charging after discharge, allowing for continued use. A battery cell includes a casing and a battery cell housed within the casing.

[0042] See Figures 1 to 16 The energy storage container of this utility model includes a housing 1, which includes a battery compartment 2 and an electrical compartment 3. The battery compartment 2 includes several sub-battery compartments 201 arranged along a first direction. Each sub-battery compartment 201 contains an equipment box 2012 and a battery pack. The electrical compartment 3 contains a liquid cooling unit 301. The energy storage container also includes an electrical cooling system 4 for cooling the equipment box 2012. The electrical cooling system 4 is provided with pipelines for containing cooling medium. Specifically, the pipelines include a first main liquid inlet pipe 401 and a first main liquid return pipe 402. The first main liquid inlet pipe 401 and the first main liquid return pipe 402 are connected by several parallel branch pipes. Each branch pipe is correspondingly arranged with an equipment box 2012. The branch pipes are in direct or indirect heat exchange contact with the equipment box 2012. The first main liquid inlet pipe 401 and the first main liquid return pipe 402 are connected to an air-cooled first heat exchanger in the liquid cooling unit 301.

[0043] The first main inlet pipe 401 and the first main return pipe 402 are connected to the first air-cooled heat exchanger inside the liquid cooling unit 301, thereby achieving air cooling of the cooling fluid in the electrical cooling system 4 piping. The cooling fluid flows into the branch pipe from the first main inlet pipe 401, and then flows out from the branch pipe through the first main return pipe 402, where it is recycled after heat exchange in the first heat exchanger. The battery pack includes several battery packs 2011 arranged in a row. The electrical cooling system 4 can direct the heat generated by the equipment box 2012 to the liquid cooling unit 301 outside the battery compartment 2. The first heat exchanger inside the liquid cooling unit 301 dissipates heat through a cooling fan, transferring the heat to the outside atmosphere for cooling. Figure 1 The diagram shows a battery compartment 2011 and a device box 2012.

[0044] This utility model discloses an energy storage container that utilizes an electrical cooling system 4 to cool the equipment box 2012. The electrical cooling system 4 includes a first main inlet pipe 401, a first main return pipe 402, and branch pipes connected in series. Each branch pipe is correspondingly positioned to one equipment box 2012 and makes heat exchange contact with the equipment box 2012, thereby achieving heat exchange and cooling of the equipment box 2012. By implementing the electrical cooling system 4 to cool the equipment box 2012, the temperature of the equipment box 2012 is reduced, preventing heat dissipation from the equipment box 2012 into the battery compartment 2. This solves the problem of excessive heat in the equipment box 2012 causing a temperature rise in the battery compartment 2, thus reducing the temperature inside the battery compartment 2 and extending the service life of the battery pack 2011 inside the battery compartment 2. The first main inlet pipe 401 and the first main return pipe 402 are connected to an air-cooled first heat exchanger, using air cooling to cool the cooling medium, improving heat exchange efficiency and achieving good heat exchange effect.

[0045] Specifically, the first main inlet pipe 401 is connected to the branch pipe via a first branch inlet pipe 403 and a second branch inlet pipe 404 arranged in parallel, and the first main return pipe 402 is connected to the branch pipe via a first branch return pipe 405 and a second branch return pipe 406 arranged in parallel. The branch pipe includes a first branch line 407 and a second branch line 408, such as... Figure 6 As shown, the first inlet pipe 403 and the first return pipe 405 are connected by a first branch line 407 to form a cooling circuit. In this embodiment, three first branch lines 407 are provided; in other embodiments, other numbers may be provided, which is not limited here. The second inlet pipe 404 and the second return pipe 406 are connected by a second branch line 408 to form another cooling circuit. In this embodiment, three second branch lines 408 are provided; in other embodiments, other numbers may be provided, which is not limited here. By setting up first branch lines 407 and second branch lines 408 that connect different inlet and return pipes, the problem of insufficient cooling fluid at the end of the branch lines caused by providing cooling fluid to all the branch lines with a single pipe is solved. This improves the uniformity of cooling fluid flow in the branch lines at different locations, thereby achieving reliable cooling of the equipment box 2012 at different locations and reducing the impact of the different locations of the equipment box 2012 on the cooling performance.

[0046] When the number of branch pipes is even, the number of first branch pipes 407 and second branch pipes 408 is the same; when the number of branch pipes is odd, the number of first branch pipes 407 and second branch pipes 408 differs by 1. By limiting the number of first branch pipes 407 and second branch pipes 408, the amount of cooling fluid flowing into different branch pipes is more uniform.

[0047] To improve the heat dissipation performance of the branch pipes, both the first branch pipe 407 and the second branch pipe 408 are arranged in a bent pattern, thereby extending the heat exchange length of the branch pipes and achieving better cooling effect. The first branch pipe 407 and the second branch pipe 408 are arranged corresponding to the areas of the electronic components in the corresponding equipment box 2012 to improve the heat dissipation efficiency of the electronic components.

[0048] The bending angle of the branch pipe is 60-150°. Setting the bending angle of the branch pipe within the above range can ensure the flow velocity of the heat exchange medium in the branch pipe while reducing the impact of bending on the pipe strength.

[0049] In one embodiment, such as Figure 1 and Figure 11As shown, the equipment box 2012 is located at the bottom of the sub-battery compartment 201, and the branch pipe is located between the equipment box 2012 and the bottom plate of the sub-battery compartment 201. Each sub-battery compartment 201 corresponds to one equipment box 2012. Each sub-battery compartment 201 has eight battery packs 2011, and every four battery packs 2011 form a battery group. Each sub-battery compartment 201 contains two battery groups, and the two battery groups share one equipment box 2012.

[0050] The equipment box 2012 can directly contact the branch pipe to improve heat dissipation efficiency. Alternatively, the equipment box 2012 can be connected to the branch pipe through thermally conductive adhesive to improve the reliability of the contact between the equipment box 2012 and the branch pipe, but this is not conducive to the maintenance or replacement of the equipment box 2012.

[0051] To facilitate layout and save on piping materials, the first branch inlet pipe 403, the second branch inlet pipe 404, the first branch return pipe 405, and the second branch return pipe 406 are all installed parallel to the bottom plate of the housing 1. To improve the smoothness of cooling fluid flow, the first branch inlet pipe 403 is installed at a higher height than the first branch return pipe 405, and the second branch inlet pipe 404 is installed at a higher height than the second branch return pipe 406. By setting the inlet pipe height higher than the return pipe height, it is easier for the cooling fluid to flow within the cooling pipe system. It is understood that a first power pump (not shown in the figure) is installed on the loop formed by the first branch inlet pipe 403 and the first branch return pipe 405, and on the loop formed by the second branch inlet pipe 404 and the second branch return pipe 406. The specific location of the first power pump is determined based on the actual structural space.

[0052] The inlet end of the first main liquid inlet pipe 401 is connected to the cold end of the first heat exchanger, and the outlet end of the first main liquid return pipe 402 is connected to the hot end of the first heat exchanger. The outlet end of the first main liquid inlet pipe 401 is connected to the first branch liquid inlet pipe 403 and the second branch liquid inlet pipe 404, and the inlet end of the first main liquid return pipe 402 is connected to the first branch liquid return pipe 405 and the second branch liquid return pipe 406.

[0053] In order to cool the first heat exchanger, the liquid cooling unit 301 also includes a fan for exchanging heat with the first heat exchanger. The fan is arranged corresponding to the first heat exchanger to facilitate cooling the first heat exchanger.

[0054] To facilitate the maintenance of equipment box 2012 and prevent leakage of the electrical cooling system 4 during disassembly and assembly of equipment box 2012, a two-way shut-off valve is installed on the branch pipe to control the flow of heat exchange medium in the pipe. When the two-way shut-off valve is open, the pipes at both ends of the two-way shut-off valve are disconnected, thus allowing maintenance or installation of equipment box 2012 without releasing the cooling fluid in the branch pipe. It is understood that one two-way shut-off valve can be installed at each end of each branch pipe, allowing the branch pipe to be disconnected from the inlet and / or return pipes according to actual usage.

[0055] Specifically, the equipment box 2012 is a PCS (Power Conversion System), which is an energy storage converter and a core component of the energy storage system. It controls battery charging and discharging and performs AC-DC conversion, directly supplying power to AC loads when there is no power grid. It consists of a bidirectional converter, control unit, etc. Each sub-battery compartment 201 contains two battery packs, and each battery pack corresponds to a set of PCS modules and battery pack control modules located within the housing of the PCS. Each PCS housing contains two sets of PCS modules and battery pack control modules, and each set of PCS modules and battery pack control modules corresponds to a branch pipe, which cools one set of PCS modules and battery pack control modules.

[0056] To achieve temperature control of the battery pack 2011 within the sub-battery compartment 201, the energy storage container of this invention also includes a battery liquid cooling system 5. The battery liquid cooling system 5 includes a second main inlet pipe 502 and a second main return pipe 503, as follows: Figures 12 to 14 As shown. The battery pack includes several battery packs 2011, and each battery pack 2011 is equipped with a corresponding liquid cooling plate 501, such as... Figure 15 As shown in the figure, eight battery packs 2011 are arranged along the second direction, and correspondingly, eight liquid cooling plates 501 are arranged, each liquid cooling plate 501 corresponding to one battery pack 2011. The different liquid cooling plates 501 are arranged in parallel, and the second main liquid inlet pipe 502 and the second main liquid return pipe 503 are connected through the liquid cooling plates 501, that is, the cooling fluid in the second main liquid inlet pipe 502 flows into the liquid cooling plate 501, and the fluid in the liquid cooling plate 501 flows into the second main liquid return pipe 503.

[0057] To facilitate the cooling of the cooling fluid returned by the second main return pipe 503, a second heat exchanger is also installed in the liquid cooling unit 301. The inlet end of the second main inlet pipe 502 is connected to the cold end of the second heat exchanger, and the outlet end of the second main return pipe 503 is connected to the hot end of the second heat exchanger. The second heat exchanger is cooled by liquid cooling. A second power pump (not shown in the figure) is installed on the loop formed by the second main inlet pipe 502 and the second main return pipe 503. The specific location of the second power pump is determined according to the actual structural space.

[0058] To provide cooling fluid to the different battery packs 2011, an inlet manifold 504 and an outlet manifold 505 are also included. Both the inlet manifold 504 and the outlet manifold 505 extend along a second direction, which is the height direction of the housing 1. The inlet end of the inlet manifold 504 is connected to the second main inlet manifold 502, and the outlet end of the inlet manifold 504 is connected to the inlet of the liquid cooling plate 501. The outlet of the liquid cooling plate 501 is connected to the outlet manifold 505. To prevent excessive pressure in the circulation loop, a vent valve 7 is provided at the top of each inlet manifold 504.

[0059] To facilitate the support of the battery pack 2011, the energy storage container includes a battery support frame 6. The battery pack 2011 in each sub-battery compartment 201 is arranged on the battery support frame 6 along the height direction (i.e., the second direction) of the container 1.

[0060] In one embodiment, reference is made to Figure 16 The liquid cooling plate 501 is located at the bottom of the battery pack 2011 and is in contact with the battery pack 2011, thereby facilitating the improvement of the heat exchange efficiency of the battery pack 2011.

[0061] The second main liquid inlet pipe 502 and the second main liquid return pipe 503 extend along the arrangement direction of the sub-battery compartment 201, that is, they extend along the first direction. The second main liquid inlet pipe 502 and the second main liquid return pipe 503 are located near the bottom of the sub-battery compartment 201, and are also located near the door of the housing 1. The liquid inlet branch pipe 504 is connected to the top of the second main liquid inlet pipe 502, and the liquid outlet branch pipe 505 is connected to the top of the second main liquid return pipe 503.

[0062] In one specific embodiment, the second main inlet pipe 502 and the second main return pipe 503 are made of stainless steel. The inlet branch pipe 504 and the outlet branch pipe 505 are made of nylon. Specifically, the second main inlet pipe 502 and the second main return pipe 503 are made of stainless steel, while the inlet branch pipe 504 and the outlet branch pipe 505 are made of nylon.

[0063] To improve the compactness of the structure and save costs, each sub-battery compartment 201 is equipped with a liquid inlet pipe 504 and a liquid outlet pipe 505.

[0064] To facilitate support of the battery pack 2011, a support wing plate 601 is provided on the battery support frame 6, and the battery pack 2011 is mounted on the support wing plate 601. Specifically, the support wing plate 601 is arranged parallel to the bottom plate of the housing 1, and a connecting through hole is provided on the support wing plate 601. The battery pack 2011 is fixedly connected to the connecting through hole position by a connector. The connector can be a connecting screw or a connecting bolt, or other commonly used connecting structures, which are not limited here.

[0065] Along the second direction, that is, along the height direction of the housing 1, the spacing between adjacent support wing plates 601 is H1mm, and the height of the battery pack 2011 is H2mm. Figure 11 As shown, H1 is greater than H2, which not only facilitates the placement of the battery pack 2011 on the support wing plate 601, but also provides space for heat dissipation, making it easier for the battery pack 2011 to dissipate heat.

[0066] The energy storage container of this utility model includes an electrical cooling system 4 and a battery liquid cooling system 5. The electrical cooling system 4 is used to cool the equipment box 2012, and the battery liquid cooling system 5 is used to cool the battery pack 2011. This ensures that the temperature of both the equipment box 2012 and the battery pack 2011 is within the set range, avoiding the impact of the large heat generated by the equipment box 2012 on the battery pack 2011. It also eliminates the need to use the battery pack 2011 inside the battery compartment 2 for cooling, resulting in better temperature control and a longer service life for the battery pack 2011.

[0067] In the description of this solution, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this solution, "multiple" means two or more, unless otherwise explicitly specified.

[0068] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0069] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An energy storage container, characterized in that, The device includes a housing, which comprises a battery compartment and an electrical compartment. The battery compartment includes several sub-battery compartments arranged along a first direction. Each sub-battery compartment contains an equipment box and a battery pack. The electrical compartment contains a liquid cooling unit and also includes an electrical cooling system for cooling the equipment box. The electrical cooling system has pipelines for containing cooling medium, including a first main liquid inlet pipe and a first main liquid return pipe. The first main liquid inlet pipe and the first main liquid return pipe are connected by several parallel branch pipes. The branch pipes are corresponding to the equipment box and have heat exchange contact with the equipment box. The first main liquid inlet pipe and the first main liquid return pipe are connected to an air-cooled first heat exchanger in the liquid cooling unit.

2. The energy storage container according to claim 1, characterized in that, The branch pipes are arranged in a bend, and the branch pipes are set in the area where the electronic components of the equipment box are located.

3. The energy storage container according to claim 2, characterized in that, The bending angle of the branch pipe is 60-150°.

4. The energy storage container according to claim 1 or 2, characterized in that, The equipment box is located at the bottom of the sub-battery compartment, and the branch pipe is located between the equipment box and the bottom plate of the sub-battery compartment.

5. The energy storage container according to claim 1, characterized in that, The first main inlet pipe is connected to the branch pipe through a first branch inlet pipe and a second branch inlet pipe arranged in parallel. The first main return pipe is connected to the branch pipe through a first branch return pipe and a second branch return pipe arranged in parallel. The branch pipe includes a first branch line and a second branch line. The first liquid inlet pipe and the first liquid return pipe are connected through the first branch, and the second liquid inlet pipe and the second liquid return pipe are connected through the second branch.

6. The energy storage container according to claim 5, characterized in that, The number of the first branch road and the second branch road are the same; Alternatively, the number of the first branch road differs from the number of the second branch road by 1.

7. The energy storage container according to claim 5, characterized in that, The first liquid inlet pipe, the second liquid inlet pipe, the first liquid return pipe, and the second liquid return pipe are all arranged parallel to the bottom plate of the box. The height of the first liquid inlet pipe is higher than that of the first liquid return pipe, and the height of the second liquid inlet pipe is higher than that of the second liquid return pipe.

8. The energy storage container according to claim 1, characterized in that, The inlet end of the first main liquid inlet pipe is connected to the cold end of the first heat exchanger, and the outlet end of the first main liquid return pipe is connected to the hot end of the first heat exchanger.

9. The energy storage container according to claim 8, characterized in that, The liquid cooling unit also includes a fan for exchanging heat with the first heat exchanger, and the fan is configured corresponding to the first heat exchanger.

10. The energy storage container according to claim 1, characterized in that, The branch pipe is equipped with a two-way shut-off valve for controlling the flow of heat exchange medium in the pipe.

11. The energy storage container according to claim 1, characterized in that, The equipment box is a PCS, and each of the sub-battery compartments is equipped with two battery packs. Each battery pack corresponds to a set of PCS modules and battery pack control modules located in the housing of the PCS. Each set of PCS modules and battery pack control modules is equipped with two sets of PCS modules and battery pack control modules, and each set of PCS modules and battery pack control modules is equipped with a branch pipeline.

12. The energy storage container according to claim 1, characterized in that, It also includes a battery liquid cooling system, which includes a second main liquid inlet pipe and a second main liquid return pipe; The battery pack includes several battery packs, each of which is equipped with a liquid cooling plate. Different liquid cooling plates are connected in parallel, and the second main liquid inlet pipe and the second main liquid return pipe are connected through the liquid cooling plates.

13. The energy storage container according to claim 12, characterized in that, It also includes an inlet pipe and an outlet pipe. The inlet end of the inlet pipe is connected to the second main inlet pipe, the outlet end of the inlet pipe is connected to the inlet of the liquid cooling plate, and the outlet of the liquid cooling plate is connected to the outlet pipe.

14. The energy storage container according to claim 13, characterized in that, It includes a battery support frame, and the battery packs in each of the sub-battery compartments are arranged on the battery support frame along the height direction of the housing.

15. The energy storage container according to claim 14, characterized in that, The inlet and outlet manifolds extend along the height of the tank.

16. The energy storage container according to claim 12, characterized in that, The liquid cooling plate is disposed at the bottom of the battery pack and is in contact with the battery pack.

17. The energy storage container according to claim 13, characterized in that, The second main liquid inlet pipe and the second main liquid return pipe extend along the arrangement direction of the sub-battery compartment. The second main liquid inlet pipe and the second main liquid return pipe are located near the bottom of the sub-battery compartment. The liquid inlet branch pipe is connected to the top of the second main liquid inlet pipe, and the liquid outlet branch pipe is connected to the top of the second main liquid return pipe.

18. The energy storage container according to claim 15, characterized in that, Each of the inlet manifolds is equipped with a vent valve at its top.

19. The energy storage container according to claim 12, characterized in that, The second main inlet pipe and the second main return pipe are made of stainless steel.

20. The energy storage container according to claim 13, characterized in that, The inlet and outlet manifolds are made of nylon.

21. The energy storage container according to claim 13, characterized in that, Each of the sub-battery compartments is equipped with a liquid inlet pipe and a liquid outlet pipe.

22. The energy storage container according to claim 12, characterized in that, The liquid cooling unit is equipped with a second heat exchanger. The inlet end of the second main liquid inlet pipe is connected to the cold end of the second heat exchanger, and the outlet end of the second main liquid return pipe is connected to the hot end of the second heat exchanger.

23. The energy storage container according to claim 14, characterized in that, The battery support frame is provided with a support wing plate, and the battery pack is mounted on the support wing plate.

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