Energy storage device and its casing

Abstract

The casing of the energy storage device includes a casing body 10, a grounding joint assembly 20, and a grounding connection member 30. The grounding portion of the battery pack is electrically connected to the second connecting member 23 via the grounding connection member 30 and is connected to a grounding network outside the casing body 10 by the first connecting member 22 of the grounding joint assembly, thereby realizing grounding attachment of the battery pack. During assembly, a first fastening member 40 is used to penetrate the joint assembly body 21 and connect to the corresponding support 13, thereby connecting the grounding joint assembly 20 to the inner wall of the casing body 10, and the first connecting member 22 is inserted into the through-hole 11, connecting the first connecting member 22 to the grounding network for grounding. The grounding joint assembly 20 has a simple structure, making it easy to produce and assemble, reducing costs, and allowing the size of the grounding joint assembly 20 to be made smaller, further reducing its occupied space.

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This disclosure claims priority to a Chinese patent application entitled "Energy Storage Device and Casing Thereof," filed with the State Intellectual Property Office of the People's Republic of China on December 28, 2023, bearing application number 202311829638.1, the entire contents of which are incorporated herein by reference.

[0002] This application relates to the field of battery technology, and in particular to energy storage devices and casings thereof. [Background technology]

[0003] An energy storage device in the related art includes a casing made of an insulating material and a battery pack installed inside the casing. To improve safety and prevent electrical leakage from the casing, it has been proposed to install a grounding member in the casing and electrically connect the grounding member to a first connecting member of the battery pack and a grounding network outside the casing via conductors to form a circuit. However, the grounding member in the related art is typically a machined part and fixed to the casing by injection molding. The complex design of the grounding member not only makes it difficult to automate production, but also increases costs and occupies a large space. Summary of the Invention [Problem to be solved by the invention]

[0004] According to embodiments of the present application, the present application provides an energy storage device and a casing thereof. [Means for solving the problem]

[0005] 1. A casing for an energy storage device, comprising: a casing body having a through hole and at least one support portion on an inner wall thereof; a grounding joint assembly including a joint assembly body connected to the inner wall of the casing body, a first coupling member and a second coupling member connected to the joint assembly body, the first coupling member being inserted into the through hole; at least one first fastening member that penetrates the joint assembly body and is connected to the support portion; A connector is provided connected to the second coupling member and includes a ground connection member used for electrically connecting to a battery pack.

[0006] In one embodiment, a first protrusion is provided on the inner wall of the casing body, and a first escape hole communicating with the through hole is provided in the first protrusion, the joint assembly body is in close contact with the first protrusion, and the first connecting member may be further inserted into the first escape hole.

[0007] In one embodiment, there may be at least two support portions, at least two first fastening members, each first fastening member being installed corresponding to a respective support portion, and / or the joint assembly body may include a flat plate, and both the first fastening member and the first connecting member may be installed on the flat plate.

[0008] In one embodiment, the joint assembly body includes a first joint assembly plate and a second joint assembly plate that are installed at an angle and connected to each other, the first joint assembly plate abutting against the support portion, the first fastening member passing through the first joint assembly plate and correspondingly connecting to the support portion, the second joint assembly plate abutting against the support portion, and a clearance space is provided between the first joint assembly plate and an inner wall of the casing body, and the first coupling member may be provided on the second joint assembly plate.

[0009] In one embodiment, the support portion is provided as a support pillar or a support block. Two support portions may be provided, and the two support portions may be located on opposite sides of the through hole.

[0010] In one embodiment, an engaging connection portion may be provided on the support portion and / or the inner wall of the casing body, and the second joint assembly plate may be engaged and fixed to the engaging connection portion at a side portion thereof facing away from the first joint assembly plate.

[0011] In one embodiment, the casing body may include a first casing wall and a second casing wall connected to the first casing wall and installed at an angle to the first casing wall, the through hole being formed in the first casing wall, and the support portion being connected to the second casing wall.

[0012] In one embodiment, the first casing wall may be provided as a side wall of the casing body, the second casing wall may be provided as a bottom wall of the casing body, and the second connecting member may be installed on the first joint assembly plate.

[0013] In one embodiment, the connector is provided with a first mounting hole, the second coupling member is provided with a second mounting hole corresponding to the position of the first mounting hole, the casing of the energy storage device further includes a second fastening member, and the connector is fixed to the second coupling member by the second fastening member passing through the first mounting hole and the second mounting hole in sequence; A second protrusion may be provided on the inner wall of the casing body, and a second escape hole corresponding to the second connecting member may be provided in the second protrusion, the joint assembly body may be in close contact with the second protrusion, and the second connecting member may be further inserted into the second escape hole.

[0014] An energy storage device may include a casing of the above-mentioned energy storage device and further include a battery pack, the battery pack being installed inside the casing, and the ground portion of the battery pack being electrically connected to the ground connection member.

[0015] The details of one or more embodiments of the present application are set forth in the drawings and description that follow. Other features, objects, and advantages of the present application will become apparent from the description, drawings, and claims. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a schematic diagram of a casing configuration of an energy storage device in one embodiment of the present application. [Figure 2] FIG. 2 is an exploded schematic view of the configuration shown in FIG. [Figure 3] FIG. 3 is a cross-sectional view of the configuration shown in FIG. [Figure 4] FIG. 4 is an enlarged schematic view of the position A in FIG. [Figure 5] FIG. 5 is a diagram showing the configuration shown in FIG. 1 from a different perspective. [Figure 6] FIG. 6 is a structural diagram of a ground joint assembly according to another embodiment of the present application. [Figure 7] FIG. 7 is a schematic diagram of a casing configuration of an energy storage device according to another embodiment of the present application. [Figure 8] FIG. 8 is an exploded schematic view of the configuration shown in FIG. [Figure 9] FIG. 9 is a cross-sectional view of the configuration shown in FIG. [Figure 10] FIG. 10 is a schematic diagram of a configuration in which the position B in FIG. 9 is enlarged. [Figure 11] FIG. 11 is a diagram showing the configuration shown in FIG. 6 from a different perspective. [Figure 12] FIG. 12 is a structural diagram of a ground joint assembly according to another embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0017] In order to make the above-mentioned objects, features, and advantages of the present application clearer and easier to understand, specific embodiments of the present application will be described in detail in conjunction with the drawings. In the following description, many specific details are described in order to fully understand the present application, but the present application may be implemented in other ways different from the contents described in this specification, and those skilled in the art may make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0018] Referring to FIGS. 1 to 6 or 7 to 12, FIGS. 1 to 6 show schematic diagrams of components related to a casing of an energy storage device according to one embodiment of the present disclosure, and FIGS. 7 to 12 show schematic diagrams of components related to a casing of an energy storage device according to another embodiment of the present disclosure. In one embodiment of the present disclosure, a casing for an energy storage device is provided. The casing for the energy storage device includes a casing body 10, a grounding joint assembly 20, and a grounding connection member 30. A through-hole 11 is provided in the casing body 10. The casing body 10 is specifically manufactured using a non-metallic material. Furthermore, the shape of the casing body 10 may be freely adjusted and installed in various regular or irregular shapes, such as a rectangular parallelepiped or cylindrical shape, according to actual needs, and is not limited thereto. Furthermore, the specific location of the through-hole 11, i.e., the location where the first connecting member 22 is installed on the casing body 10, may be freely adjusted and installed in any of the bottom wall, side wall, and top wall of the casing body 10 according to actual needs.

[0019] The ground joint assembly 20 is connected to the inner wall of the casing body 10, and includes a joint assembly body 21 connected to the inner wall of the casing body 10, and a first connecting member 22 and a second connecting member 23 connected to the joint assembly body 21. The first connecting member 22 is inserted into the through-hole 11.

[0020] Furthermore, the ground connection member 30 is provided with a connector 31. The connector 31 is connected to the second coupling member 23. The ground connection member 30 is electrically connected to a battery pack (not shown). The ground connection member 30 includes a ground wire, a conductive piece, and a conductive strip, or a combination thereof, and can be freely adjusted and installed according to actual requirements.

[0021] The "connector 31" may be "a part of the ground connection member 30," i.e., the "connector 31" and "other parts of the ground connection member 30" may be manufactured by integral molding. Alternatively, the "connector 31" may be an individual component that can be separated from the "other parts of the ground connection member 30." In other words, the "connector 31" may be manufactured separately and then combined with the "other parts of the ground connection member 30" to form a single component.

[0022] In the casing of the above-described energy storage device, the grounding portion of the battery pack is electrically connected to the second coupling member 23 via the ground connection member 30, and is connected to a grounding network outside the casing body 10 by the first coupling member 22 of the grounding joint assembly 20, thereby realizing grounding attachment of the battery pack. During assembly, the first fastening member 40 is used to penetrate the joint assembly body 21 and connect to the corresponding support 13, thereby connecting the grounding joint assembly 20 to the inner wall of the casing body 10, and the first coupling member 22 is inserted into the through-hole 11 to connect to the grounding network for grounding. Compared to the related art method of injection molding a casing using machined parts, the grounding joint assembly 20 has a simpler structure, is easier to produce and assemble, and is less expensive, while the size of the grounding joint assembly 20 can be made smaller and occupy less space.

[0023] 1 to 6 , in one embodiment, a first protrusion 12 is provided on the inner wall of the casing body 10. A first relief hole 121 communicating with the through hole 11 is provided in the first protrusion 12, the joint assembly body 21 is closely fitted to the first protrusion 12, and the first connecting member 22 is further inserted into the first relief hole 121. In this way, when the wall thickness of the casing body 10 is smaller than the length of the first connecting member 22, the first protrusion 12 is provided on the inner wall of the casing body 10, so that the first connecting member 22 can be inserted into the first relief hole 121. In other words, the first relief hole 121 and the through hole 11 form a space to accommodate the first connecting member 22, preventing the first connecting member 22 from protruding outside the through hole 11. Furthermore, the presence of the first protrusion 12 is equivalent to increasing the local thickness of the casing body 10, which improves the structural strength of the casing body 10 and further improves the mounting stability of the joint assembly body 21, while eliminating the need to increase the overall wall thickness of the casing body 10, thereby reducing costs.

[0024] The "first protrusion 12" may be "a part of the casing body 10," i.e., the "first protrusion 12" and "other parts of the casing body 10" may be manufactured by integral molding. The "first protrusion 12" may also be an individual component that can be separated from "other parts of the casing body 10." In other words, the "first protrusion 12" may be manufactured separately and then combined with "other parts of the casing body 10" to form a single component.

[0025] 1 to 4 , in one embodiment, at least one support 13 is provided on the inner wall of the casing body 10. The casing of the energy storage device further includes at least one first fastening member 40. The first fastening member 40 passes through the joint assembly body 21 and is connected to the corresponding support 13. In this manner, the first fastening member 40 can firmly connect the joint assembly body 21 to the support 13, thereby further improving the mounting stability of the joint assembly body 21 on the casing body 10. Meanwhile, the presence of the support 13 increases the local thickness of the casing body 10, improving the structural strength of the casing body 10 and further improving the mounting stability of the joint assembly body 21. This does not require an increase in the overall wall thickness of the casing body 10, thereby reducing costs.

[0026] The "support portion 13" may be "a part of the casing body 10," i.e., the "support portion 13" and "other parts of the casing body 10" may be manufactured by integral molding. Alternatively, the "support portion 13" may be an individual component that can be separated from the "other parts of the casing body 10." In other words, the "support portion 13" may be manufactured separately and then combined with the "other parts of the casing body 10" to form a single component.

[0027] 1 to 4, in one embodiment, at least two supports 13 are provided, and at least two first fastening members 40 are provided, each of which is installed corresponding to one of the supports 13. In this manner, each of the first fastening members 40 passes through the joint assembly body 21 and is then connected to a corresponding one of the supports 13, thereby enabling the joint assembly body 21 to be stably installed in the casing body 10.

[0028] Specifically, the joint assembly body 21 is provided with a through hole 211 corresponding to the first fastening member 40 , and the first fastening member 40 is inserted into the through hole 211 .

[0029] In some embodiments, the first fastener 40 may include, but is not limited to, a fastener such as a screw, a bolt, a pin, a rivet, etc. The support 13 may have a mounting hole that is compatible with the first fastener 40, thereby providing a fixed connection between the first fastener 40 and the support 13.

[0030] 1 to 4, in this embodiment, for example, two support parts 13 and two first fastening members 40 are required, and it is not necessary to install more support parts 13 and first fastening members 40. Therefore, the joint assembly body 21 can be stably installed in the casing body 10, the configuration is simplified, production and assembly are easy, costs are reduced, and the size of the ground joint assembly 20 can be made smaller, further reducing the space it occupies.

[0031] 1 to 4, in some embodiments, the two support parts 13 are installed symmetrically with respect to the central axis in the extension direction of the joint assembly body 21, the extension direction being the direction from one end of the joint assembly body 21 to the other end, and the central axis in the extension direction being a straight line that passes through the center of the joint assembly body 21 and is installed along the extension direction of the joint assembly body 21. In this way, the joint assembly body 21 can be stably installed in the casing body 10.

[0032] 1 to 6 , in one embodiment, the joint assembly body 21 includes, but is not limited to, a flat plate 212 or other irregularly shaped plate component. In the embodiment, the joint assembly body 21 includes, but is not limited to, a flat plate 212. The first fastening member 40 and the first connecting member 22 are both installed on the flat plate 212. Specifically, the first fastening member 40 is installed on the flat plate 212 in a direction perpendicular to the surface of the flat plate 212 so that the flat plate 212 is in close contact with the support 13. The first connecting member 22 is also installed on the flat plate 212 in a direction perpendicular to the surface of the flat plate 212 and inserted into the through-hole 11. In this manner, the support 13 and the first protrusion 12 are adjacently disposed, resulting in a compact overall configuration and a reduced space requirement.

[0033] Similarly, the second fastening member 50 is installed, for example, on the flat plate 212 in a direction perpendicular to the surface of the flat plate 212, to fix the connector 31 to the flat plate 212 and bring the flat plate 212 into close contact with the second protrusion 17. Furthermore, the extending direction of the first relief hole 121 of the first protrusion 12, the extending direction of the second relief hole 171 of the second protrusion 17, and the extending direction of the mounting hole of the support portion 13 are all perpendicular to the surface of the flat plate 212. In this way, the support portion 13, the first protrusion 12, and the second protrusion 17 are arranged adjacent to each other, making the overall configuration compact and reducing the occupied space.

[0034] In some embodiments, the flat plate 212 and the through-hole 11 may be provided on any of the bottom wall, side wall, and top wall of the casing body 10, but are not limited thereto. Specifically, they may be freely adjusted and installed according to actual requirements, but are not limited thereto.

[0035] 7 to 12, the shape of the joint assembly body 21 shown in FIGS. 7 to 12 is different from the shape of the joint assembly body 21 shown in FIGS. 1 to 6. In one embodiment, the joint assembly body 21 includes a first joint assembly plate 213 and a second joint assembly plate 214 that are angled and connected to each other. At least one support 13 is further provided on the inner wall of the casing body 10. The casing of the energy storage device further includes at least one first fastening member 40. The first joint assembly plate 213 abuts against the support 13, and the first fastening member 40 passes through the first joint assembly plate 213 and is connected to the corresponding support 13. The second joint assembly plate 214 abuts against the support 13, and a clearance space is provided between the second joint assembly plate 214 and the inner wall of the casing body 10. The first connecting member 22 is provided on the second joint assembly plate 214. In this way, the first fastening member 40 passes through the first joint assembly plate 213 and is fixedly connected to the support part 13, and the second joint assembly plate 214 abuts against the support part 13, allowing the joint assembly body 21 to be stably installed in the casing body 10. In addition, the support part 13 forms a gap between the second joint assembly plate 214 and the inner wall of the casing body 10, and this gap space and the through hole 11 form a space to accommodate the first connecting member 22, preventing the first connecting member 22 from protruding outside the through hole 11, eliminating the need to increase the thickness of the casing body 10.

[0036] 7 to 10, in one embodiment, the support portions 13 are provided as support pillars or support blocks. Two support portions 13 are provided, and the two support portions 13 are located on opposite sides of the through hole 11. In this manner, not only is the joint assembly body 21 stably connected to the casing body 10, but the number of support portions 13 is minimized and they are installed as support pillars or support blocks, resulting in a simple and compact configuration and a reduced product size. In addition, by being located on opposite sides of the through hole 11, the two support portions 13 can avoid the first connecting member 22 and do not interfere with it.

[0037] 7 and 8, in one embodiment, the support 13 and / or the inner wall of the casing body 10 are provided with an engaging connection portion 14, and the second joint assembly plate 214 is engaged and fixed to the engaging connection portion 14 at the side away from the first joint assembly plate 213. In this way, the second joint assembly plate 214 is engaged and fixed to the engaging connection portion 14, so that the joint assembly body 21 can be more stably installed in the casing body 10.

[0038] 7 to 12, in one embodiment, the casing body 10 includes a first casing wall 15 and a second casing wall 16 connected to the first casing wall 15 and disposed at an angle thereto. The through-hole 11 is formed in the first casing wall 15, and the support portion 13 is connected to the second casing wall 16. In this manner, the first casing wall 15 and the second casing wall 16 are connected to form corners of the casing body 10, i.e., the ground joint assembly 20 is disposed at the corner of the casing body 10, thereby reducing the space occupied by the casing body 10 and achieving a compact configuration.

[0039] The first casing wall 15 and the second casing wall 16 are adjacent to either the bottom wall, the side wall, or the top wall of the casing body 10 and are independently installed on two walls installed at an angle, but they can be freely adjusted and installed according to actual requirements and are not limited here.

[0040] 7 to 12, in one embodiment, the first casing wall 15 is the side wall of the casing body 10, the second casing wall 16 is the bottom wall of the casing body 10, and the second connecting member 23 is installed on the first joint assembly plate 213. In this way, during assembly, the first joint assembly plate 213 is installed on the top surface of the support part 13, making it easy to fix the connector 31 and the first joint assembly plate 213 from above using the second fastening member 50.

[0041] 1 to 4, in one embodiment, the first protrusion 12 is integrally molded with the casing body 10. The support 13 is integrally molded with the casing body 10. Specifically, the first protrusion 12, the support 13, and the casing body 10 may be integrally molded by, but not limited to, injection molding or molding. This allows for mass production of the casing body 10 and improves production efficiency.

[0042] 1 to 4, in one embodiment, a first mounting hole 311 is provided in the connector 31, and a second mounting hole 231 is provided in the second coupling member 23 at a position corresponding to the first mounting hole 311. A second fastening member 50 is further included in the casing of the energy storage device, and the connector 31 is fixed to the second coupling member 23 via the second fastening member 50, passing through the first mounting hole 311 and the second mounting hole 231 in that order.

[0043] In some embodiments, the second fastening member 50 may include, but is not limited to, a fastening member such as a screw, a bolt, a pin, a rivet, etc. The second mounting hole 231 provided in the second coupling member 23 is provided corresponding to the second fastening member 50, thereby enabling a fixed connection between the second fastening member 50 and the second coupling member 23.

[0044] 1 to 4 , in one embodiment, a second protrusion 17 is provided on the inner wall of the casing body 10. The second protrusion 17 is provided with a second relief hole 171 corresponding to the second connecting member 23, so that the joint assembly body 21 is in close contact with the second protrusion 17, and the second connecting member 23 is further inserted into the second relief hole 171. As described above, the second protrusion 17 is provided on the inner wall of the casing body 10, allowing the second fastening member 50 to be inserted into the second relief hole 171, thereby providing a clearance. In addition, the second protrusion 17 allows the local thickness of the casing body 10 to be increased, improving the structural strength of the casing body 10 and further improving the mounting stability of the joint assembly body 21. This also eliminates the need to increase the overall wall thickness of the casing body 10, thereby reducing costs.

[0045] The "second protrusion 17" may be "a part of the casing body 10," i.e., the "second protrusion 17" and "other parts of the casing body 10" may be manufactured by integral molding. The "second protrusion 17" may also be an individual component that can be separated from the "other parts of the casing body 10." In other words, the "second protrusion 17" may be manufactured separately and then combined with the "other parts of the casing body 10" to form a single component.

[0046] In one embodiment, the first coupling member 22 is secured to the joint assembly body 21 using various means including, but not limited to, riveting, welding, adhesive, a mating connection, or a threaded connection, and the second coupling member 23 is secured to the joint assembly body 21 using various means including, but not limited to, riveting, welding, adhesive, a mating connection, or a threaded connection.

[0047] In this embodiment, the first connecting member 22 and the second connecting member 23 are fixed to the joint assembly body 21 by, for example, rivet crimping, respectively, and can be quickly installed and fixed to the joint assembly body 21, but are more stable on the joint assembly body 21 than other mounting methods.

[0048] In some embodiments, the first coupling member 22 includes components such as, but not limited to, a nut, terminal block, clamp, or grip, which facilitates connection to a ground wire and, through the ground wire, electrical connection to a ground network.

[0049] 1 to 6, in one embodiment, an energy storage device includes a casing of the energy storage device of any one of the above embodiments, and further includes a battery pack. The battery pack is installed inside the casing, and a ground portion of the battery pack is electrically connected to the ground connection member 30.

[0050] In the above-described energy storage device, the grounding portion of the battery pack is electrically connected to the second coupling member 23 via the ground connection member 30, and is connected to a grounding network outside the casing body 10 by the first coupling member 22 of the grounding joint assembly 20, thereby realizing grounding attachment of the battery pack. During assembly, the grounding joint assembly 20 is connected to the inner wall of the casing body 10, and the first coupling member 22 is inserted into the through-hole 11, and the first coupling member 22 is connected to the grounding network. Compared with the related art method of injection molding parts machined by a machine tool into a casing, the configuration of the grounding joint assembly 20 is simpler, and production and assembly are easier, reducing costs. The size of the grounding joint assembly 20 can also be made smaller, further reducing the space it occupies.

[0051] In the description of this application, the orientations or positional relationships indicated by terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" are based on the orientations or positional relationships shown in the drawings and are intended to be for ease of explanation and simplification of the present application only. They do not mean or suggest that the devices or elements referred to necessarily have a particular orientation or must be configured and operated in a particular orientation, and should not be construed as limiting the present application.

[0052] In describing embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or the number of the indicated technical features. Thus, a feature qualified as "first" or "second" may explicitly or implicitly include at least one of that feature. Unless otherwise expressly and specifically limited, the term "plurality" means at least two, e.g., two, three, etc.

[0053] In this application, unless otherwise clearly defined or limited, terms such as "attached," "connected," "connected," and "fixed" should be understood in a broad sense, and may mean, for example, a fixed connection, a detachable connection, or being integrated. They may also be mechanically connected or electrically connected. They may also be directly connected or indirectly connected via an intermediate medium. They may also refer to internal communication between two elements, or to an interactive relationship between two elements. Unless otherwise clearly defined, the specific meanings of the above terms in this application will be understood by those skilled in the art depending on the specific circumstances.

[0054] Unless otherwise clearly defined and limited, in this application, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intermediate medium. Furthermore, a first feature being "above," "above," and "on the upper surface" of a second feature may simply indicate that the first feature is directly above or diagonally above the second feature, or that the horizontal height of the first feature is greater than that of the second feature. A first feature being "below," "below," and "on the lower surface" of a second feature may simply indicate that the first feature is directly below or diagonally below the second feature, or that the horizontal height of the first feature is smaller than that of the second feature.

[0055] It should be noted that when an element is referred to as being "fixed" or "mounted" to another element, it may be directly connected to the other element, or there may be intervening elements. When an element is considered to be "connected" to another element, it may be directly connected to the other element, or there may be intervening elements. The terms "vertical," "horizontal," "top," "bottom," "left," "right," and similar terms used herein are for descriptive purposes only and do not represent the only embodiment.

[0056] The technical features of the above-described embodiments can be combined in any manner. For the sake of simplicity, not all combinations of the technical features in the above-described embodiments are described, but any combination of these technical features should be considered within the scope described in this specification unless there is a contradiction.

[0057] The above-described embodiments merely illustrate some embodiments of the present application, and although the description is specific and detailed, it should not be construed as limiting the scope of protection of the invention. Those skilled in the art may make minor modifications and improvements without departing from the spirit of the present application, and all of these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined in accordance with the claims. [Explanation of symbols]

[0058] 10 casing body, 11 through hole, 12 first protrusion, 121 first relief hole, 13 support portion, 14 engaging connection portion, 15 first casing wall, 16 second casing wall, 17 second protrusion, 171 second relief hole, 20 ground joint assembly, 21 joint assembly body, 211 through hole, 212 plane plate, 213 first joint assembly plate, 214 second joint assembly plate, 22 first connecting member, 23 second connecting member, 231 second mounting hole, 30 ground connection member, 31 connector, 311 first mounting hole, 40 first fastening member, 50 second fastening member

Claims

1. 1. A casing for an energy storage device, comprising: a casing body having a through hole and at least one integrally formed support portion on an inner wall; a grounding joint assembly fixedly connected to an inner wall of the casing body, the grounding joint assembly including: a joint assembly body connected to the inner wall of the casing body; and a first connecting member and a second connecting member connected to the joint assembly body, the first connecting member being inserted into the through-hole and not protruding from the through-hole to the outside of the casing body; at least one first fastening member passing through the joint assembly body and connected to the support portion, the joint assembly body including a first joint assembly plate and a second joint assembly plate connected to each other and disposed at an angle, the first joint assembly plate abutting the support portion, the first fastening member passing through the first joint assembly plate and connected to the support portion, the second joint assembly plate abutting the support portion, a clearance space being defined between the first joint assembly plate and an inner wall of the casing body, and the first coupling member being provided on the second joint assembly plate; a ground connection member having a connector connected to the second coupling member and electrically connected to a ground portion of the battery pack, the connector being used to realize grounding of the battery pack by connecting the first coupling member to a ground network outside the casing body, the connector having a first mounting hole, the second coupling member having a second mounting hole corresponding to the position of the first mounting hole, and the connector being fixedly installed to the second coupling member by the second fastening member passing through the first mounting hole and the second mounting hole in sequence; and a ground connection member and a second fastening member.

2. The casing of the energy storage device according to claim 1 , wherein the casing body is formed in a rectangular parallelepiped or cylindrical shape.

3. 2. The casing of claim 1, wherein at least two of the support portions are provided, at least two of the first fastening members are provided, and each of the first fastening members is installed corresponding to each of the support portions.

4. 2. The casing of claim 1, wherein the joint assembly body has a through hole corresponding to the first fastening member, and the first fastening member is inserted into the through hole.

5. 2. The casing of claim 1, wherein the support portion is provided as a support pillar or a support block, and two support portions are provided, and the two support portions are located on opposite sides of the through hole.

6. 2. The casing of claim 1, wherein an engaging connection portion is provided on the support portion and / or the inner wall of the casing body, and the second joint assembly plate has a side portion away from the first joint assembly plate engaged and fixed to the engaging connection portion.

7. 2. The casing of claim 1, wherein the casing body includes a first casing wall and a second casing wall connected to the first casing wall and installed at an angle to the first casing wall, the through hole being formed in the first casing wall, and the support portion being connected to the second casing wall.

8. 8. The casing of claim 7, wherein the first casing wall is provided as a side wall of the casing body, the second casing wall is provided as a bottom wall of the casing body, and the second connecting member is installed on the first joint assembly plate.

9. The casing of the energy storage device according to any one of claims 1 to 8, characterized in that the first connecting member and the second connecting member are each fixed to the joint assembly body by rivet crimping.

10. 1. An energy storage device, comprising: An energy storage device comprising: a casing for the energy storage device according to any one of claims 1 to 9; and a battery pack, wherein the battery pack is installed inside the casing, and a grounding portion of the battery pack is electrically connected to the ground connection member.

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