Energy storage device

Abstract

Provided is an energy storage device, comprising: an electrical module (100), the electrical module (100) comprising an electrical cabinet (110), and an accommodating cavity (111) being formed in the electrical cabinet (110); two battery modules (200), the electrical module (100) being sandwiched between the two battery modules (200), and the two battery modules (200) respectively covering two ends of the accommodating cavity (111); and a first sealing member (300), wherein the first sealing member (300) surrounds the accommodating cavity (111), and the first sealing member (300) is pressed between the battery modules (200) and the electrical module (100) so as to seal the accommodating cavity (111). The battery modules (200) can serve as cabinet doors for sealing the accommodating cavity (111) of the electrical module (100), so that the sealing structure of the energy storage device is simplified, reducing the manufacturing cost of the energy storage device after being subjected to sealing treatment.

Description

Energy storage device

[0001] This disclosure claims priority to Chinese patent application number 202310753913.X, filed on June 26, 2023, entitled “Energy Storage Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to an energy storage device. Background Art

[0003] Energy storage devices are widely used in the new energy sector. They typically require sealing to prevent droplets and dust from entering the device, potentially causing short circuits or damage. However, sealing traditional energy storage devices complicates their structure, increasing manufacturing costs.

[0004] Summary of the Invention

[0005] The present disclosure provides an energy storage device to reduce the manufacturing cost of the energy storage device after a sealing process.

[0006] According to one aspect of the present disclosure, there is provided an energy storage device, comprising:

[0007] An electrical module, the electrical module comprising an electrical cabinet, the electrical cabinet being provided with a receiving cavity;

[0008] A battery module, wherein there are two battery modules, the electrical module is sandwiched between the two battery modules, and the two battery modules respectively cover the two ends of the receiving cavity; and

[0009] a first sealing member, the first sealing member being disposed around the receiving cavity and being pressed between the battery module and the electrical module to seal the receiving cavity;

[0010] The battery module includes a box body, a cover plate, a battery cell, and a second sealing member. The box body is provided with a receiving cavity, the battery cell is accommodated in the receiving cavity, the cover plate is provided on the box body and covers the receiving cavity, the second sealing member is provided around the receiving cavity, and the second sealing member is pressed between the cover plate and the box body to seal the receiving cavity;

[0011] The battery module further includes a liquid cooling plate connected to the box body and used to cool the battery cells. All the battery cells are placed naked in the accommodating cavity and share the liquid cooling plate.

[0012] The battery module also includes a fixing part, a first liquid cooling connector and a first electrical connector. The fixing part is connected to the box body and is located in the accommodating cavity. The first liquid cooling connector and the first electrical connector are both arranged on the fixing part. The first liquid cooling connector is connected to the liquid cooling plate and the electrical module. The first electrical connector is electrically connected to the electrodes of the battery module and the electrical module.

[0013] Technical effects of the present disclosure:

[0014] Given that the battery module is arranged on the electrical module and covers the receiving cavity, the first seal is pressed between the battery module and the electrical module to seal the receiving cavity, that is, the battery module directly seals the receiving cavity of the electrical module through the first seal, so that the battery module can serve as a cabinet door for sealing the receiving cavity of the electrical module, thereby eliminating the need to set an additional cabinet door on the electrical cabinet for sealing the receiving cavity, thereby simplifying the sealing structure of the energy storage device and reducing the manufacturing cost of the energy storage device after the sealing process.

[0015] All cells are placed naked within the housing and share a common liquid cooling plate. This reduces the number of connecting pipes used, lowering the probability of failure during manufacturing and operation, thereby reducing manufacturing costs and improving operational stability and reliability. Furthermore, high-voltage and low-voltage connecting wires between adjacent cells are eliminated, further reducing manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other features and advantages of the present disclosure will become more apparent by describing in detail example embodiments thereof with reference to the accompanying drawings.

[0017] FIG1 is a schematic diagram of the three-dimensional structure of an energy storage device provided in one embodiment.

[0018] FIG2 is a schematic diagram of the exploded structure of the energy storage device shown in FIG1 after removing a battery module.

[0019] FIG3 is a schematic structural diagram of FIG2 from another perspective.

[0020] FIG4 is a schematic diagram of a three-dimensional cross-sectional structure of the energy storage device shown in FIG1 with one battery module removed.

[0021] FIG5 is a schematic diagram of the exploded structure of the battery module in the energy storage device shown in FIG1 .

[0022] FIG6 is a schematic diagram of the partial structure of the battery module shown in FIG5 after removing the box body and the cover plate.

[0023] FIG7 is a schematic diagram of a first partial planar cross-sectional structure of the energy storage device shown in FIG1 .

[0024] FIG8 is a schematic diagram of a second partial planar cross-sectional structure of the energy storage device shown in FIG1 .

[0025] Figure numerals: energy storage device 10; electrical module 100; electrical cabinet 110; accommodating cavity 111; limiting groove 112; liquid cooling unit 120; controller 130; second liquid cooling connector 160; second electrical connector 170; bolt 180; battery module 200; box body 210; accommodating cavity 211; cover plate 220; mounting hole 221; battery cell 230; second sealing member 240; fixing member 250; first liquid cooling connector 260; first electrical connector 270; copper busbar 280; liquid cooling plate 290; positive electrode column 201; negative electrode column 202; first sealing member 300; positioning column 410; positioning hole 420. DETAILED DESCRIPTION

[0026] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of the illustrations to another component, these terms are used in this specification only for convenience, such as the orientation of the examples described in the accompanying drawings. It will be understood that if the device of the illustrations is flipped so that it is upside down, the component described as "upper" will become the component "lower". Other relative terms such as "top" and "bottom" are also used to have similar meanings. When a structure is "on" another structure, it may mean that the structure is formed integrally on the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

[0027] The terms "a", "an", "the" and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express open-ended inclusion and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc.; the terms "first", "second", etc. are used only as labels and do not limit the quantity of their objects.

[0028] 1, 2, and 3, an energy storage device 10 provided in one embodiment of the present application includes an electrical module 100, a battery module 200, and a first sealing member 300. The battery module 200 can be stacked on the electrical module 100, with the first sealing member 300 pressed between the electrical module 100 and the battery module 200.

[0029] Referring to Figures 2, 3, and 4, the electrical module 100 includes an electrical cabinet 110, which is provided with a receiving cavity 111 for accommodating other components of the electrical module 100. The electrical cabinet 110 also has a limiting groove 112. The limiting groove 112 can be formed by recessing the surface of the electrical cabinet 110 to a set depth. The limiting groove 112 is arranged around the opening of the receiving cavity 111. The first sealing member 300 can be a sealing ring. The first sealing member 300 cooperates with the limiting groove 112. The limiting groove 112 plays a good positioning role for the first sealing member 300, thereby improving the assembly efficiency and accuracy of the first sealing member 300. Of course, the limiting groove 112 can also be provided on the battery module 200. When the battery module 200 is stacked on the electrical module 100, the battery module 200 covers the receiving cavity 111, that is, the battery module 200 covers the receiving cavity 111, so that the first sealing member 300 is pressed between the electrical module 100 and the battery module 200, and then the first sealing member 300 plays a good sealing role in the receiving cavity 111.

[0030] If the electrical module and battery module share a cabinet, the cabinet is separated by partitions to form an electrical compartment and a battery compartment. The electrical module is housed in the electrical compartment, and the battery module is housed in the battery compartment. The electrical cabinet door covers the battery compartment, and the battery cabinet door covers the battery compartment. Therefore, the gap between the electrical cabinet door and the cabinet needs to be filled to seal the electrical compartment, and the gap between the battery cabinet door and the cabinet needs to be filled to seal the battery compartment. Seals are also required on the partitions to seal and isolate the electrical and battery compartments. This results in a more complex sealing structure for the entire energy storage device, increasing the manufacturing cost of the sealed energy storage device.

[0031] In the energy storage device 10 of the above embodiment, the battery module 200 is directly sealed against the receiving cavity 111 of the electrical module 100 via the first sealing member 300, so that the battery module 200 can serve as a cabinet door for sealing the receiving cavity 111 of the electrical module 100, thereby eliminating the need for an additional cabinet door on the electrical cabinet 110 for sealing the receiving cavity 111. This simplifies the sealing structure of the energy storage device 10 and reduces the manufacturing cost of the sealed energy storage device 10. It can be understood that by sealing the receiving cavity 111, external dust and liquid droplets can be effectively prevented from entering the receiving cavity 111, thereby preventing corrosion of components within the receiving cavity 111 or causing short circuits.

[0032] Referring to FIG1 , in some embodiments, the structures of the battery module 200 and the electrical module 100 can be roughly the same. For example, both can be roughly rectangular, and the coverage areas of the two can also be roughly the same. When the battery module 200 and the electrical module 100 are stacked on each other, the outer side surfaces of the electrical module 100 and the battery module 200 can be flush with each other, which will improve the overall consistency of the appearance of the entire energy storage device 10 and facilitate the installation and transportation of the energy storage device 10. After the battery module 200 and the electrical module 100 are stacked on each other, the battery module 200 and the electrical module 100 can be connected by fasteners such as bolts 180 (as shown in FIG7 ), so that the battery module 200 and the electrical module 100 form a detachable connection relationship.

[0033] Referring to FIG. 1 , in some embodiments, for example, the receiving cavity 111 of the electrical cabinet 110 has two openings, the two openings being spaced apart along the thickness direction of the electrical cabinet 110. In this case, two battery modules 200 are required, such that the two battery modules 200 are located on opposite sides of the thickness direction of the electrical cabinet 110, thereby sealing the two openings of the receiving cavity 111. Therefore, the energy storage device 10 includes one electrical module 100 and two battery modules 200. For another example, the receiving cavity 111 of the electrical cabinet 110 has one opening. In this case, only one battery module 200 is required, and the opening of the receiving cavity 111 is sealed by the battery module 200. Therefore, the energy storage device 10 includes one electrical module 100 and one battery module 200.

[0034] Referring to Figures 4, 5, and 6, in some embodiments, a battery module 200 includes a housing 210, a cover plate 220, battery cells 230, and a second sealing member 240. A housing 210 is provided with a receiving cavity 211. Multiple battery cells 230 may be arranged in a matrix within the receiving cavity 211, with all battery cells 230 positioned naked within the receiving cavity 211. The housing 210 may include a positioning groove. The positioning groove may be formed by recessing the surface of the housing 210 facing the cover plate 220 to a predetermined depth. The positioning groove surrounds the opening of the receiving cavity 211. The second sealing member 240 may be a sealing ring. The second sealing member 240 cooperates with the positioning groove, which effectively positions the second sealing member 240, improving assembly efficiency and precision. Alternatively, the positioning groove may be provided on the surface of the cover plate 220 facing the housing 210. When the battery module 200 is set on the box body 210, the cover plate 220 is covered on the accommodating cavity 211, so that the second sealing member 240 is pressed between the cover plate 220 and the box body 210, and then the second sealing member 240 plays a good sealing role on the accommodating cavity 211. Obviously, through the combined action of the first sealing member 300 and the second sealing member 240, the accommodating cavity 111 of the electrical module 100 and the accommodating cavity 211 of the battery module 200 can be sealed and isolated, thereby eliminating the need for additional sealing members to isolate and seal the accommodating cavity 111 and the accommodating cavity 211 from each other, thereby further simplifying the sealing structure of the energy storage device 10 and reducing the manufacturing cost of the energy storage device 10 after the sealing process. It can be understood that by sealing the accommodating cavity 211, it is possible to effectively prevent external dust and droplets from entering the accommodating cavity 211, thereby avoiding corrosion of the battery cell 230 and other components in the accommodating cavity 211 or causing short circuit phenomena, etc. When the battery module 200 is stacked on the electrical module 100 , the first sealing member 300 may be pressed between the cover plate 220 of the battery module 200 and the electrical cabinet 110 of the electrical module 100 .

[0035] If the battery module of the energy storage device adopts a model including multiple battery cells, that is, multiple battery cells are stacked on top of each other to form a battery module. Each battery cell includes a housing, a cover, a battery cell, and a seal. The number of battery cells can be multiple, and the multiple battery cells are housed in the inner cavity of the housing. The cover is used to cover the inner cavity of the housing. The seal is located between the housing and the cover, so that the seal seals the inner cavity of the housing. This will result in the battery module having multiple housings, covers, and seals, which will make the structure of the energy storage device 10 more complex and increase the manufacturing cost of the energy storage device.

[0036] In contrast, the battery module 200 in the aforementioned embodiment only requires a housing 210, a cover 220, and a second seal 240, with all battery cells 230 placed naked within the housing cavity 211 of the housing 210. The battery cells 230 do not need to be packaged with housings, covers, and seals to form multiple battery units. Instead, all battery cells 230 share a single housing 210, cover 220, and second seal 240, eliminating the need for multiple housings, covers, and seals used to form battery units. This simplifies the structure of the energy storage device 10 and reduces its manufacturing cost.

[0037] Referring to Figures 4, 5, and 6, in some embodiments, the battery module 200 may further include a fixing member 250, a first liquid-cooling connector 260, a first electrical connector 270, a copper busbar 280, a liquid-cooling plate 290, and a third seal (not shown). The fixing member 250 may be disposed within the accommodating cavity 211, and the liquid-cooling plate 290 may be connected to the housing 210. A heat exchange channel may be defined within the liquid-cooling plate 290, with an inlet and an outlet at each end of the heat exchange channel. Liquid may flow in through the inlet and out through the outlet. The liquid may specifically refer to a cooling liquid having a heat exchange function. The heat generated by the battery cell 230 can be conducted to the liquid cooling plate 290. When a liquid with a lower temperature is passed into the heat exchange channel, the liquid will absorb the heat conducted to the liquid cooling plate 290 in the heat exchange channel. The liquid after absorbing the heat will be discharged from the outlet, so that the liquid can dissipate heat and cool the liquid cooling plate 290 and the accommodating cavity 211, ensuring that the battery cell 230 operates in a reasonable temperature environment and avoiding damage to the battery cell 230 due to excessive temperature.

[0038] The fixing member 250 can be a plate-like structure, and the first liquid-cooling connector 260 and the first electrical connector 270 are both arranged on the fixing member 250, so that the fixing member 250 serves as a carrier for the first liquid-cooling connector 260 and the first electrical connector 270. The first liquid-cooling connector 260 can include a liquid inlet pipe and a liquid outlet pipe. The liquid with a lower temperature enters the heat exchange channel through the liquid inlet pipe and the inlet. After absorbing heat, the liquid with a higher temperature flows from the heat exchange channel through the outlet to the liquid outlet pipe. Referring to Figure 6, the number of copper bars 280 can be two. The positive interface of the first electrical connector 270 can be electrically connected to the positive electrode 201 of the battery module 200 through one of the copper bars 280, and the negative interface of the first electrical connector 270 can be electrically connected to the negative electrode 202 of the battery module 200 through the other copper bar 280. The positive electrode column 201 and the negative electrode column 202 extend in different directions. For example, the positive electrode column 201 can extend along the width of the battery module 200, while the negative electrode column 202 can extend along the thickness of the battery module 200. This will facilitate the layout of the two copper busbars 280, thereby simplifying the structure of the battery module 200.

[0039] The first liquid-cooling connector 260 and the first electrical connector 270 can both be secured to the fixed plate via a snap-on connection, forming a quick-plug and quick-change structure, eliminating the need for fasteners such as bolts to attach the first liquid-cooling connector 260 and the first electrical connector 270 to the fixed member 250. During assembly, the first liquid-cooling connector 260 and the first electrical connector 270 can be assembled by a robot, thereby automating the assembly of the battery module 200, improving the assembly efficiency of the battery module 200 and the entire energy storage device 10, and thereby reducing manufacturing costs.

[0040] If the battery module still uses a model that includes multiple battery cells, each battery cell housing will need to have inlet and outlet ports for liquid inflow and outflow to dissipate heat and cool the battery cells within the battery cell. This will require the installation of connecting pipes at the inlet and outlet ports on each battery cell, thereby increasing the number of connecting pipes used and, in turn, the manufacturing cost of the energy storage device. In addition, high-voltage and low-voltage connecting wires are required between adjacent battery cells to electrically connect the two battery cells. Given the large number of high-voltage and low-voltage connecting wires, the manufacturing cost of the energy storage device will be further increased.

[0041] In the energy storage device 10 of the aforementioned embodiment, since all battery cells 230 within the battery module 200 share a single liquid cooling plate 290, only one inlet and outlet are provided on the liquid cooling plate 290. This reduces the number of connecting pipes used, lowering the probability of failure of the energy storage device 10 during manufacturing and operation, thereby reducing the manufacturing cost of the energy storage device 10 and improving the operational stability and reliability of the energy storage device 10. Furthermore, since all battery cells 230 are placed naked within the accommodating cavity 211, this eliminates the need for high-voltage and low-voltage connecting wires between adjacent battery cells 230, further reducing the manufacturing cost of the energy storage device 10.

[0042] 4 , 5 , and 6 , in some embodiments, the cover plate 220 is provided with mounting holes 221, which are through-holes extending through the entire cover plate 220 along its thickness. The first liquid-cooling connector 260 is disposed in one of the mounting holes 221, and the first electrical connector 270 is disposed in the other mounting hole 221. A third sealing member, which may be a sealing ring, is pressed between the cover plate 220 and the fixing member 250 to seal the mounting holes 221. For example, there are two third sealing members, one of which is disposed around the first liquid-cooling connector 260 to seal the mounting hole 221 through which the first liquid-cooling connector 260 is disposed, and the other is disposed around the first electrical connector 270 to seal the mounting hole 221 through which the first electrical connector 270 is disposed.

[0043] 2 , 3 , and 4 , in some embodiments, the electrical module 100 further includes a liquid cooling unit 120, a controller 130, a second liquid cooling connector 160, and a second electrical connector 170. The liquid cooling unit 120 and the controller 130 may both be located within the receiving cavity 111, with the liquid cooling unit 120 connected to the second liquid cooling connector 160, which in turn is connected to the first liquid cooling connector 260, such that the second liquid cooling connector 160 is connected between the liquid cooling unit 120 and the first liquid cooling connector 260. The lower-temperature liquid is output through the liquid cooling unit 120 and sequentially passes through the second liquid cooling connector 160 and the first liquid cooling connector 260 to enter the inlet of the heat exchange channel of the liquid cooling plate 290. After absorbing heat, the higher-temperature liquid is returned to the liquid cooling unit 120 from the outlet of the heat exchange channel through the first liquid cooling connector 260 and the second liquid cooling connector 160, thereby achieving heat dissipation from the battery cells 230 by the liquid cooling unit 120. The second electrical connector 170 is connected between the controller 130 and the first electrical connector 270. Since the first electrical connector 270 is electrically connected to the positive and negative electrodes of the battery module 200, respectively, the controller 130 can control the voltage of the battery module 200 through the second electrical connector 170 and the first electrical connector 270, so that the battery module 200 forms a high-voltage and low-voltage electrical connection through the controller 130.

[0044] In some embodiments, the second liquid-cooling connector 160 and the second electrical connector 170 can both be secured to the electrical cabinet 110 via a snap-on connection. This allows the second liquid-cooling connector 160 and the second electrical connector 170 to form a quick-plug and quick-change structure, eliminating the need for fasteners such as bolts to attach the second liquid-cooling connector 160 and the second electrical connector 170 to the electrical cabinet 110. During assembly, the second liquid-cooling connector 160 and the second electrical connector 170 can be assembled by a robot, thereby automating the assembly of the electrical module 100 and reducing manufacturing costs by improving the assembly efficiency of the electrical module 100 and the entire energy storage device 10.

[0045] In some embodiments, one of the first liquid-cooling connector 260 and the second liquid-cooling connector 160 is a connecting plug and the other is a connecting socket. By assembling the connecting plug and the connecting socket, the assembly efficiency between the first liquid-cooling connector 260 and the second liquid-cooling connector 160 can be improved, and the first liquid-cooling connector 260 and the second liquid-cooling connector 160 can also be formed into a detachable connection. Similarly, one of the first electrical connector 270 and the second electrical connector 170 is a connecting plug and the other is a connecting socket. By assembling the connecting plug and the connecting socket, the assembly efficiency between the first electrical connector 270 and the second electrical connector 170 can be improved, and the first electrical connector 270 and the second electrical connector 170 can also be formed into a detachable connection. Given the improved assembly efficiency between the first liquid-cooling connector 260 and the second liquid-cooling connector 160, and between the first electrical connector 270 and the second electrical connector 170, the assembly efficiency of the energy storage device 10 can also be improved, thereby reducing manufacturing costs.

[0046] Referring to FIG. 8 , in some embodiments, for the electrical cabinet 110 on the electrical module 100 and the housing 210 on the battery module 200, one of the electrical cabinet 110 and the housing 210 may be provided with a positioning hole 420, while the other may be provided with a positioning post 410. For example, the electrical cabinet 110 may be provided with a positioning hole 420, while the housing 210 may be provided with a positioning post 410. For another example, the electrical cabinet 110 may be provided with a positioning post 410, while the housing 210 may be provided with a positioning hole 420. During the assembly process of the electrical module 100 and the battery module 200, the coordination of the positioning holes 420 and the positioning posts 410 can improve the assembly efficiency and accuracy of the electrical module 100 and the battery module 200.

[0047] It should be understood that the present disclosure is not limited in its application to the detailed structure and arrangement of the components set forth in this specification. The present disclosure is capable of other embodiments and can be implemented and carried out in a variety of ways. The aforementioned variations and modifications fall within the scope of the present disclosure. It should be understood that the present disclosure disclosed and defined in this specification extends to all alternative combinations of two or more individual features mentioned or evident in the text and / or the drawings. All of these different combinations constitute multiple alternative aspects of the present disclosure. The embodiments described in this specification illustrate the best known ways to implement the present disclosure and will enable those skilled in the art to utilize the present disclosure.

Claims

1. An energy storage device, characterized in that: include: An electrical module, the electrical module comprising an electrical cabinet, the electrical cabinet having a receiving cavity; A battery module, wherein the number of the battery modules is two, the electrical module is sandwiched between the two battery modules, and the two battery modules respectively cover the two ends of the receiving cavity; and A first sealing member, the first sealing member is disposed around the receiving cavity, and the first sealing member is pressed between the battery module and the electrical module to seal the receiving cavity; The battery module comprises a box body, a cover plate, a battery cell and a second sealing member, the box body is provided with a receiving cavity, the battery cell is received in the receiving cavity, the cover plate is provided on the box body and covers the receiving cavity, the second sealing member is provided around the receiving cavity, and the second sealing member is pressed between the cover plate and the box body to seal the receiving cavity; The battery module also includes a liquid cooling plate connected to the box body and used to cool the battery cells. All the battery cells are placed naked in the accommodating cavity and share the liquid cooling plate. The battery module also includes a fixing part, a first liquid-cooling connector and a first electrical connector. The fixing part is connected to the box body and is located in the accommodating cavity. The first liquid-cooling connector and the first electrical connector are both arranged on the fixing part. The first liquid-cooling connector is connected to the liquid cooling plate and the electrical module. The first electrical connector is electrically connected to the electrodes of the battery module and the electrical module.

2. The energy storage device according to claim 1, characterized in that: The battery module further includes a third sealing member. The cover plate is provided with a mounting hole for passing the first liquid-cooling connector and the first electrical connector. The third sealing member is pressed between the cover plate and the fixing member to seal the mounting hole.

3. The energy storage device according to claim 1, characterized in that: The first liquid-cooling connector and the first electrical connector are both snap-connected to the fixing member.

4. The energy storage device according to claim 1, characterized in that: The battery module also includes a copper busbar, through which the first electrical connector is electrically connected to the positive electrode column and the negative electrode column of the battery module respectively. The positive electrode column extends along the width direction of the battery module, and the negative electrode column extends along the thickness direction of the battery module.

5. The energy storage device according to claim 1, characterized in that: The electrical module also includes a liquid cooling unit, a controller, a second liquid cooling connector and a second electrical connector. The liquid cooling unit and the controller are located in the accommodating cavity. The second liquid cooling connector and the second electrical connector are both arranged on the electrical cabinet by means of a snap-on connection. The second liquid cooling connector is connected between the liquid cooling unit and the first liquid cooling connector, and the second electrical connector is connected between the controller and the first electrical connector.

6. The energy storage device according to claim 5, characterized in that: One of the first liquid-cooling connector and the second liquid-cooling connector is a connection plug and the other is a connection socket; one of the first electrical connector and the second electrical connector is a connection plug and the other is a connection socket.

7. The energy storage device according to claim 1, characterized in that: The first sealing member is pressed between the cover plate and the electrical cabinet.

8. The energy storage device according to claim 1, characterized in that: The outer side surfaces of the electrical module and the battery module are flush with each other.

9. The energy storage device according to claim 1, characterized in that: The electrical cabinet is recessed to form a limiting groove arranged around the receiving cavity, and the first sealing member cooperates with the limiting groove.

10. The energy storage device according to claim 1, characterized in that: The electrical module and the battery module are both connected by bolts; And / or, one of the electrical module and the battery module includes a positioning column and the other is provided with a positioning hole, and the positioning column cooperates with the positioning hole.

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