Liquid cooling system and energy storage system

Abstract

The utility model provides a liquid cooling system and an energy storage system, and the system comprises a first liquid cooling module which comprises a first liquid cooling plate which extends along a first direction; the second liquid cooling module comprises at least one second liquid cooling plate, the second liquid cooling plate is connected with the first liquid cooling plate, the second liquid cooling plate is perpendicular to the first liquid cooling plate, the second liquid cooling plate extends in the second direction, and the second direction is perpendicular to the first direction; the third liquid cooling module comprises at least one third liquid cooling plate, the third liquid cooling plate is connected with the first liquid cooling plate and the second liquid cooling plate, at least one containing space is defined by the third liquid cooling plate, and the third liquid cooling plate is perpendicular to the first liquid cooling plate and the second liquid cooling plate; wherein the first liquid cooling module, the second liquid cooling module and the third liquid cooling module are of an integrated structure. The liquid cooling system provided by the utility model can effectively improve the cooling effect on the battery cell in the energy storage system.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a liquid cooling system and an energy storage system. Background Art

[0002] The new energy industry has ushered in rapid development. Due to the volatility of new energy power generation and grid connection, the demand for new energy storage is increasing. At present, the new energy industry generally uses 20-foot or 40-foot standard container energy storage systems as energy storage carriers. During the charging and discharging process, the container energy storage system will release a lot of heat and affect the service life of the battery box. Therefore, the battery box of the container energy storage system needs to be cooled.

[0003] At present, the battery box structure on the market generally includes a box body, a liquid cooling plate and a battery cell. The battery cell is generally placed on the liquid cooling plate, and the coolant flows inside the liquid cooling plate while taking away the heat of the battery cell. Currently, there is only one end surface of the battery cell in direct contact with the liquid cooling plate, and the cooling effect of the battery cell is not good, which has a great impact on the consistency and service life of the battery box. Utility Model Content

[0004] The embodiments of the present utility model provide a liquid cooling system and an energy storage system. The liquid cooling system is an integrated structure and can cool multiple surfaces of a battery cell at the same time, thereby effectively improving the cooling effect of the battery cell in the energy storage system.

[0005] The utility model provides a liquid cooling system, comprising:

[0006] A first liquid cooling module, comprising at least one first liquid cooling plate, wherein the first liquid cooling plate extends along a first direction;

[0007] A second liquid cooling module, comprising at least one second liquid cooling plate, wherein the second liquid cooling plate is connected to the first liquid cooling plate, the second liquid cooling plate is perpendicular to the first liquid cooling plate, and the second liquid cooling plate extends along a second direction, and the second direction is perpendicular to the first direction;

[0008] A third liquid cooling module, comprising at least one third liquid cooling plate, wherein the third liquid cooling plate is connected to the first liquid cooling plate and the second liquid cooling plate and defines at least one accommodating space, and the third liquid cooling plate is perpendicular to the first liquid cooling plate and the second liquid cooling plate;

[0009] Wherein, the first liquid cooling module, the second liquid cooling module and the third liquid cooling module are an integrated structure.

[0010] In one embodiment, the second liquid cooling module includes a plurality of second liquid cooling plates, and in the first direction, the plurality of second liquid cooling plates are arranged at equal intervals.

[0011] In one embodiment, the third liquid cooling module includes a plurality of the third liquid cooling plates, and in the third direction, the plurality of the third liquid cooling plates are arranged at equal intervals, wherein the third direction is perpendicular to the first direction and the second direction.

[0012] In one embodiment, a first flow channel is provided in the first liquid cooling plate, a second flow channel is provided in the second liquid cooling plate, a third flow channel is provided in the third liquid cooling plate, and the first flow channel, the second flow channel and the third flow channel are communicated.

[0013] In one embodiment, the liquid cooling system further includes at least one liquid inlet and at least one liquid outlet;

[0014] The liquid inlet is provided on the first liquid cooling module or the second liquid cooling module or the third liquid cooling module;

[0015] The liquid outlet is provided on the first liquid cooling module or the second liquid cooling module or the third liquid cooling module.

[0016] In one embodiment, the liquid cooling system has opposite bottom and top surfaces, and in the direction from the bottom surface to the top surface, the liquid inlet is located below the liquid outlet.

[0017] In one embodiment, the first liquid cooling module, the second liquid cooling module and the third liquid cooling module are connected by welding;

[0018] and / or the materials of the first liquid cooling plate, the second liquid cooling plate and the second liquid cooling plate are aluminum or aluminum alloy.

[0019] In one embodiment, the first liquid cooling module includes a plurality of the first liquid cooling plates, and the plurality of the first liquid cooling plates are arranged along the first direction and / or the third direction, and adjacent two of the first liquid cooling plates are connected to each other, wherein the third direction is perpendicular to the first direction and the second direction.

[0020] The present utility model further provides an energy storage system, including:

[0021] A housing having an accommodation cavity;

[0022] The liquid cooling system as described above, which is disposed in the accommodation cavity;

[0023] At least one battery cell, and the battery cell is disposed in the accommodation space of the liquid cooling system.

[0024] In one embodiment, the energy storage system further includes a fire protection system, and the fire protection system includes at least one fire protection module, and one fire protection module is correspondingly provided for one accommodation space.

[0025] The present utility model provides a liquid cooling system and an energy storage system. The liquid cooling system includes a first liquid cooling module, a second liquid cooling module, and a third liquid cooling module. The first liquid cooling module, the second liquid cooling module, and the third liquid cooling module are interconnected to define an accommodation space for accommodating and carrying battery cells. The first liquid cooling module, the second liquid cooling module, and the third liquid cooling module respectively cool different surfaces of the battery cells, which can effectively improve the cooling effect on the battery cells in the energy storage system. Moreover, the first liquid cooling module, the second liquid cooling module, and the third liquid cooling module are of an integral structure, having high strength, and can act as a support beam structure of the energy storage system to play a supporting role, reducing the original steel structure in the energy storage system, thereby reducing the weight of the energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following described drawings are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0027] Figure 1 is a schematic structural diagram of a liquid cooling system provided by an embodiment of the present utility model;

[0028] Figure 2 is Figure 1 a front view of a liquid cooling system provided;

[0029] Figure 3 is Figure 1 a top view of a liquid cooling system provided;

[0030] Figure 4 is Figure 1 a side view of a liquid cooling system provided;

[0031] Figure 5 is a schematic structural diagram of an energy storage system provided by an embodiment of the present utility model;

[0032] Figure 6 is Figure 5 a front view of an energy storage system provided;

[0033] Figure 7 is Figure 5 a top view of an energy storage system provided;

[0034] Figure 8 is Figure 5 a side view of an energy storage system provided. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are only a part rather than all of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model. In the present utility model, unless otherwise stated, the orientation terms such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the accompanying drawings; and "inner" and "outer" refer to the outline of the device.

[0036] Please refer to Figures 1-4 , a liquid cooling system 100 provided by the present application, including:

[0037] The first liquid cooling module 110 includes at least one first liquid cooling plate 111, and the first liquid cooling plate 111 extends along the first direction X;

[0038] The second liquid cooling module 120 includes at least one second liquid cooling plate 121, the second liquid cooling plate 121 is connected to the first liquid cooling plate 111, and the second liquid cooling plate 121 is perpendicular to the first liquid cooling plate 111. The second liquid cooling plate 121 extends along the second direction Y, and the second direction Y is perpendicular to the first direction X;

[0039] The third liquid cooling module 130 includes at least one third liquid cooling plate 131, the third liquid cooling plate 131 is connected to the first liquid cooling plate 111 and the second liquid cooling plate 121 and defines at least one accommodation space 140, and the third liquid cooling plate 131 is perpendicular to the first liquid cooling plate 111 and the second liquid cooling plate 121;

[0040] Among them, the first liquid cooling module 110, the second liquid cooling module 120 and the third liquid cooling module 130 are of an integral structure.

[0041] In the present application, the liquid cooling system 100 includes the first liquid cooling module 110, the second liquid cooling module 120 and the third liquid cooling module 130. The three liquid cooling modules are connected to each other and define independent accommodation spaces 140. One battery cell 300 is arranged in one accommodation space 140, which can avoid mutual interference between different battery cells 300. Moreover, the first liquid cooling module 110, the second liquid cooling module 120 and the third liquid cooling module 130 are located on different sides of the battery cell 300, and can cool multiple surfaces of the battery cell 300 simultaneously, which can effectively improve the cooling effect of the battery cell 300.

[0042] In the structure of the liquid cooling system 100, the third liquid cooling module 130 extends along the horizontal plane XOY and is located at the bottom surface of the battery cell 300 for supporting the battery cell 300. The first liquid cooling module 110 extends along the vertical plane XOZ, and the second liquid cooling module 120 extends along the vertical plane YOZ. They are used to space multiple battery cells 300 in the energy storage system and can also serve as vertical beams to play a supporting role in the vertical direction, thereby reducing the steel structure used for vertical beams in the energy storage system and further reducing the overall weight of the energy storage system.

[0043] In one embodiment, please refer to Figures 1-2 , the second liquid cooling module 120 may include a plurality of second liquid cooling plates 121. In the first direction X, the plurality of second liquid cooling plates 121 are arranged at equal intervals to ensure the cooling uniformity of the liquid cooling system 100 for each battery cell 300. The distance between two adjacent second liquid cooling plates 121 matches the size of the battery cell 300. For example, it may be slightly larger than the size of the battery cell 300 in the first direction X to facilitate the installation of the battery cell 300.

[0044] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 4 , the third liquid cooling module 130 includes a plurality of third liquid cooling plates 131. In the third direction Z, the plurality of third liquid cooling plates 131 are arranged at equal intervals to ensure the cooling uniformity of the liquid cooling system 100 for each battery cell 300, where the third direction Z is perpendicular to the first direction X and the second direction Y. The plurality of third liquid cooling plates 131 are stacked in the third direction Z, defining a plurality of accommodation spaces 140 arranged along the third direction Z between the first liquid cooling plate 111 and the second liquid cooling plate 121. Each third liquid cooling plate 131 bears one battery cell 300. The distance between two adjacent third liquid cooling plates 131 matches the size of the battery cell 300. For example, it may be slightly larger than the size of the battery cell 300 in the third direction Z to facilitate the assembly of the battery cell 300.

[0045] Specifically, please refer to Figure 1 , the liquid cooling system 100 includes a first liquid cooling module 110, a second liquid cooling module 120, and a third liquid cooling module 130.

[0046] The first liquid cooling module 110 includes a first liquid cooling plate 111, and the first liquid cooling plate 111 extends along the first direction X.

[0047] The second liquid cooling module 120 includes a plurality of the second liquid cooling plates 121. The plurality of the second liquid cooling plates 121 are respectively connected to the first liquid cooling plate 111, and the plurality of the second liquid cooling plates 121 are all perpendicular to the first liquid cooling plate 111. The second liquid cooling plate 121 extends along the second direction Y. Among them, the plurality of the second liquid cooling plates 121 are respectively arranged on opposite sides of the first liquid cooling plate 111 in the second direction Y, and the second liquid cooling plates 121 located on both sides of the first liquid cooling plate 111 are symmetrically arranged with respect to the first liquid cooling plate 111, and the plurality of the second liquid cooling plates 121 located on the same side of the first liquid cooling plate 111 are arranged at equal intervals.

[0048] The third liquid cooling module 130 includes a plurality of the third liquid cooling plates 131. The plurality of the third liquid cooling plates 131 are connected to the first liquid cooling plate 111 and the second liquid cooling plate 121 and define a plurality of independent accommodation spaces 140 for accommodating the battery cells 300. Among them, the third liquid cooling plate 131 is perpendicular to the first liquid cooling plate 111, and the third liquid cooling plate 131 is perpendicular to the second liquid cooling plate 121. A plurality of the third liquid cooling plates 131 are included between the first liquid cooling plate 111 and the second liquid cooling plate 121. The plurality of the third liquid cooling plates 131 are arranged at equal intervals in the third direction Z, and the third liquid cooling plates 131 on opposite sides of the first liquid cooling plate 111 in the second direction Y are symmetrically arranged with respect to the first liquid cooling plate 111, and the third liquid cooling plates 131 on opposite sides of the second liquid cooling plate 121 in the first direction X are symmetrically arranged with respect to the second liquid cooling plate 121.

[0049] In this application, the first liquid cooling module 110 includes one or more of the first liquid cooling plates 111. When the first liquid cooling module 110 includes a plurality of the first liquid cooling plates 111, the plurality of the first liquid cooling plates 111 may be arranged along the first direction X, or along the third direction Y, or arranged in an array along the first direction X and the third direction Y at the same time, and adjacent two of the first liquid cooling plates 111 are connected to each other. That is, the first liquid cooling module 110 may be an integral body formed by splicing a plurality of the first liquid cooling plates 111, and the first liquid cooling module 110 formed by splicing the plurality of the first liquid cooling plates 111 extends along the vertical plane XOZ.

[0050] The first liquid cooling module 110, the second liquid cooling module 120, and the third liquid cooling module 130 are of an integrated structure. The first liquid cooling module 110, the second liquid cooling module 120, and the third liquid cooling module 130 can form an integrated structure through a welding connection method, for example, by using a brazing method. Specifically, the materials of the first liquid cooling plate 111, the second liquid cooling plate 121, and the third liquid cooling plate 131 can be high-strength metal materials, such as aluminum or aluminum alloy, but are not limited thereto.

[0051] In the present application, the liquid cooling system 100 can meet the requirements of energy storage systems of different sizes through modular assembly, that is, select the sizes of the first liquid cooling module 110, the second liquid cooling module 120, and the third liquid cooling module 130 according to the size of the energy storage system and then perform integrated assembly. Therefore, the liquid cooling system 100 of the present application has good versatility.

[0052] In one embodiment, a first flow channel is provided in the first liquid cooling plate 111, a second flow channel is provided in the second liquid cooling plate 121, and a third flow channel is provided in the third liquid cooling plate 131. The first flow channel, the second flow channel, and the third flow channel are connected to ensure the circulation of the coolant in the entire liquid cooling system 100 and ensure the uniformity of the liquid cooling effect of the entire liquid cooling system 100.

[0053] In one embodiment, the liquid cooling system 100 further includes at least one liquid inlet 101 and at least one liquid outlet 102. The liquid inlet 101 can be provided on the first liquid cooling module 110 or the second liquid cooling module 120 or the third liquid cooling module 130; the liquid outlet 102 can be provided on the first liquid cooling module 110 or the second liquid cooling module 120 or the third liquid cooling module 130. In the present application, the liquid inlet 101 and the liquid outlet 102 can be provided on the first liquid cooling plate 111 and connected to the first flow channel, or can be provided on the second liquid cooling plate 121 and connected to the second flow channel, or provided on the third liquid cooling plate 131 and connected to the third flow channel. Since the first flow channel, the second flow channel, and the third flow channel are connected, the liquid inlet 101 and the liquid outlet 102 can be connected to any one of the flow channels to achieve the circulation and flow of the coolant in the entire liquid cooling system 100. Therefore, the installation positions of the liquid inlet 101 and the liquid outlet 102 are not limited herein.

[0054] Specifically, please refer to Figure 1, the liquid cooling system 100 may include a plurality of the liquid inlet ports 101 and a plurality of the liquid outlet ports 102. For example, the liquid cooling system 100 includes 4 liquid inlet ports 101 and 2 liquid outlet ports 102. The 4 liquid inlet ports 101 may be arranged side by side on the third liquid cooling plate 131 and communicate with the third flow channel. The 2 liquid outlet ports 102 may be arranged side by side on the first liquid cooling plate 111 and communicate with the first flow channel. The coolant flows into the third flow channel from the 4 liquid inlet ports 101, is transported by the third flow channel to the first flow channel and the second flow channel, and finally is discharged from the 2 liquid outlet ports 102 through the first flow channel to form a coolant circulation and realize the cooling function of the liquid cooling system 100.

[0055] When the liquid cooling system 100 includes a plurality of the liquid inlet ports 101 and a plurality of the liquid outlet ports 102, the flow rate of the coolant can be increased, so that the flow rate of the entire liquid cooling system 100 is more uniform and the temperature is more balanced.

[0056] In one embodiment, please refer to Figure 1 , in the third direction Z, the liquid cooling system 100 has opposite bottom and top surfaces. The liquid inlet port 101 is arranged close to the bottom surface, and the liquid outlet port 102 is arranged close to the top surface. In the direction from the bottom surface to the top surface, the liquid inlet port 101 is located below the liquid outlet port 102, that is, the coolant enters from the bottom and exits from the top.

[0057] Specifically, when the liquid cooling system 100 is installed on a workbench, the bottom surface contacts the workbench, and the top surface is located on the side of the bottom surface away from the workbench, where the workbench may be the ground or other bearing surfaces that support the liquid cooling system 100. In the direction from the bottom surface to the top surface, as Figure 1 the third direction Z described above, the liquid inlet port 101 is located below the liquid outlet port 102, that is, the coolant is set in the form of entering from the bottom and exiting from the top. By adopting the method of the coolant entering from the bottom and exiting from the top, it can effectively avoid the generation of air pockets during the transportation of the coolant, keep the water flow stable, and the flow resistance of the coolant entering from the bottom and exiting from the top is smaller, and the transportation efficiency is higher, which can improve the cooling efficiency of the liquid cooling system 100.

[0058] In one embodiment, please refer to Figure 1 , the liquid inlet port 101 and the liquid outlet port 102 may be arranged on the same side of the liquid cooling system 100 to facilitate the assembly of the inlet water pipeline and the outlet water pipeline, where the inlet water pipeline is connected to the liquid inlet port 101 and the outlet water pipeline is connected to the liquid outlet port 102.

[0059] Please refer to Figures 5-8 , the present utility model also provides an energy storage system 10, including:

[0060] A housing 200 having a receiving cavity 210;

[0061] The liquid cooling system 100 as described above is disposed within the receiving cavity 210;

[0062] At least one battery cell 300, the battery cell 300 being disposed within the accommodation space 140 of the liquid cooling system 100.

[0063] Specifically, as Figure 5 shown, the energy storage system 10 includes a housing 200, and a receiving cavity 210 is provided inside the housing 200. The receiving cavity 210 is used to accommodate the liquid cooling system 100 and the battery cell 300. The material of the housing 200 may be metal, such as aluminum, aluminum alloy, etc., but is not limited thereto. The housing 200 is used to protect the liquid cooling system 100 and the battery cell 300.

[0064] The liquid cooling system 100 is composed of the first liquid cooling module 110, the second liquid cooling module 120, and the third liquid cooling module 130. The first liquid cooling module 110, the second liquid cooling module 120, and the third liquid cooling module 130 are interconnected to define a plurality of independent accommodation spaces 140, and one accommodation space 140 is used to accommodate one battery cell 300. Wherein, the size of the accommodation space 140 matches the size of the battery cell 300 to facilitate the assembly of the battery cell 300. The first liquid cooling module 110, the second liquid cooling module 120, and the third liquid cooling module 130 are located on different sides of the battery cell 300 and can simultaneously dissipate heat from different surfaces of the battery cell 300, thereby improving the cooling effect on the battery cell 300.

[0065] In the liquid cooling system 100, the first liquid cooling module 110, the second liquid cooling module 120, and the third liquid cooling module 130 are connected by welding to form an integral structure, and thus have high strength. The third liquid cooling module 130 functions to carry the battery cell 300. The first liquid cooling module 110 and the second liquid cooling module 120 are used to space apart a plurality of the battery cells 300, and can also act as vertical beams to provide support in the vertical direction. Therefore, the steel structure within the housing 200 can be reduced, and the weight of the energy storage system 10 can be reduced.

[0066] The energy storage system 10 further includes a plurality of the battery cells 300, and one battery cell 300 is assembled in one accommodation space 140. Since each battery cell 300 has an independent accommodation space 140, the accommodation space 140 can protect the battery cell 300. Therefore, in this application, it is no longer necessary to provide a box on the surface of the battery cell 300 to protect the battery cell 300. In this application, the battery cell 300 is directly assembled into the accommodation space 140 of the liquid cooling system 100, which can not only improve the cooling effect of the battery cell 300, but also improve the space utilization rate of the energy storage system 10 and reduce costs.

[0067] In one embodiment, the energy storage system 10 further includes a fire protection system, and the fire protection system includes at least one fire protection module, and one fire protection module is correspondingly provided for one accommodation space 140.

[0068] In a traditional energy storage system 10, all the battery cells 300 usually share a cabin. Once a certain battery cell 300 has a thermal runaway, it will quickly spread to other battery cells 300 in the cabin, easily causing a chain fire accident. In this application, each battery cell 300 has an independent accommodation space 140, and adjacent battery cells 300 are separated by a liquid cooling module. When one of the battery cells 300 has a thermal runaway, it will not quickly spread to other battery cells 300. Moreover, a corresponding fire protection module is provided in each accommodation space 140 of this application. Once a fire occurs to the battery cell 300 in this accommodation space 140, the corresponding fire protection module can extinguish the fire in this accommodation space 140 separately and precisely, and the fire can be suppressed with a smaller amount of fire extinguishing agent, minimizing the fire risk.

[0069] In summary, the present utility model provides a liquid cooling system and an energy storage system. The liquid cooling system includes a first liquid cooling module, a second liquid cooling module, and a third liquid cooling module. The first liquid cooling module, the second liquid cooling module, and the third liquid cooling module are connected to each other to define an accommodation space for accommodating and carrying battery cells. The first liquid cooling module, the second liquid cooling module, and the third liquid cooling module respectively cool different surfaces of the battery cells, which can effectively improve the cooling effect on the battery cells in the energy storage system. Moreover, the first liquid cooling module, the second liquid cooling module, and the third liquid cooling module are of an integral structure, having a relatively high strength, and can act as a support beam structure of the energy storage system to play a supporting role, reducing the original steel structure in the energy storage system and reducing the weight of the energy storage system.

[0070] The above has introduced the embodiments of the present utility model in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those skilled in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A liquid cooling system, characterized in that: include: A first liquid cooling module, comprising at least one first liquid cooling plate, wherein the first liquid cooling plate extends along a first direction; A second liquid cooling module, comprising at least one second liquid cooling plate, wherein the second liquid cooling plate is connected to the first liquid cooling plate, the second liquid cooling plate is perpendicular to the first liquid cooling plate, and the second liquid cooling plate extends along a second direction, and the second direction is perpendicular to the first direction; A third liquid cooling module, comprising at least one third liquid cooling plate, wherein the third liquid cooling plate is connected to the first liquid cooling plate and the second liquid cooling plate and defines at least one accommodating space, and the third liquid cooling plate is perpendicular to the first liquid cooling plate and the second liquid cooling plate; Wherein, the first liquid cooling module, the second liquid cooling module and the third liquid cooling module are an integrated structure.

2. The liquid cooling system according to claim 1, characterized in that: The second liquid cooling module includes a plurality of second liquid cooling plates, and in the first direction, the plurality of second liquid cooling plates are arranged at equal intervals.

3. The liquid cooling system according to claim 1, characterized in that: The third liquid cooling module includes a plurality of third liquid cooling plates, and the plurality of third liquid cooling plates are arranged at equal intervals in a third direction, wherein the third direction is perpendicular to the first direction and the second direction.

4. The liquid cooling system according to claim 1, characterized in that: A first flow channel is disposed in the first liquid cooling plate, a second flow channel is disposed in the second liquid cooling plate, a third flow channel is disposed in the third liquid cooling plate, and the first flow channel, the second flow channel and the third flow channel are in communication.

5. The liquid cooling system according to claim 1, characterized in that: The liquid cooling system further comprises at least one liquid inlet and at least one liquid outlet; The liquid inlet is arranged on the first liquid cooling module, the second liquid cooling module or the third liquid cooling module; The liquid outlet is arranged on the first liquid cooling module, the second liquid cooling module or the third liquid cooling module.

6. The liquid cooling system according to claim 5, characterized in that: The liquid cooling system has a bottom surface and a top surface relative to each other, and in a direction from the bottom surface to the top surface, the liquid inlet is located below the liquid outlet.

7. The liquid cooling system according to any one of claims 1 to 6, characterized in that: The first liquid cooling module, the second liquid cooling module and the third liquid cooling module are welded and connected; And / or the first liquid cooling plate, the second liquid cooling plate and the second liquid cooling plate are made of aluminum or aluminum alloy.

8. The liquid cooling system according to any one of claims 1 to 6, characterized in that: The first liquid cooling module includes a plurality of the first liquid cooling plates, which are arranged along the first direction and / or the third direction, and two adjacent first liquid cooling plates are connected to each other, wherein the third direction is perpendicular to the first direction and the second direction.

9. An energy storage system, characterized in that: include: The housing has a receiving cavity; The liquid cooling system according to any one of claims 1 to 8, arranged in the accommodating chamber; At least one battery cell is disposed in the accommodating space of the liquid cooling system.

10. The energy storage system according to claim 9, characterized in that: The energy storage system further includes a fire fighting system, and the fire fighting system includes at least one fire fighting module, and one fire fighting module is correspondingly arranged in one accommodating space.

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