Battery cover plate and battery pack

Abstract

The application relates to a battery cover plate, belonging to the technical field of batteries, which comprises two cover plate assemblies and a screw sleeve. The two cover plate assemblies are oppositely arranged along a first direction. The cover plate assembly comprises a cover plate body, a pole, a sealing element and an insulating sleeve. The cover plate body is provided with a mounting hole. Part of the pole is arranged in the mounting hole. One end of the pole along the first direction is provided with a threaded stud. The sealing element is sleeved on the pole. Part of the sealing element is arranged between the pole and the inner wall of the mounting hole. The insulating sleeve is sleeved on the pole. Part of the insulating sleeve is arranged between the pole and the cover plate body. The screw sleeve is arranged between the two cover plate assemblies. One end of the screw sleeve is threadedly connected with the threaded stud on one of the poles. The other end of the screw sleeve is threadedly connected with the threaded stud on the other pole. The battery cover plate and the battery pack can reduce the number of bus bars, improve the space utilization of the battery pack, reduce the welding steps and improve the production efficiency.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery cover and a battery pack. Background Technology

[0002] In the battery field, a battery pack consists of multiple battery cells, with adjacent battery cells connected in series via busbars. In related technologies, a large number of busbars are used for multiple battery cells, affecting the space utilization of the battery pack. Consequently, the welding steps for fixing multiple busbars are numerous, impacting production efficiency. Summary of the Invention

[0003] To address the aforementioned technical problems, embodiments of this application provide a battery cover and a battery pack, which can reduce the number of busbars used, improve the space utilization of the battery pack, reduce welding steps, and improve production efficiency.

[0004] In a first aspect, a battery cover is provided, comprising: Two cover plate assemblies are distributed opposite to each other along a first direction. Each cover plate assembly includes a cover plate body, a pole, a sealing element, and an insulating sleeve. The cover plate body has a mounting hole. A portion of the pole is disposed in the mounting hole. The pole protrudes from the cover plate body at opposite ends along the first direction. A stud is provided at one end of the pole along the first direction. The sealing element is sleeved on the pole. A portion of the sealing element is disposed between the pole and the inner wall of the mounting hole. The insulating sleeve is sleeved on the pole. A portion of the insulating sleeve is disposed between the pole and the cover plate body. A threaded sleeve is disposed between the two cover plate assemblies, one end of the threaded sleeve is threadedly engaged with the stud on one of the pole posts, and the other end of the threaded sleeve is threadedly engaged with the stud on the other pole post; One of the cover plate assemblies has a terminal for connecting to the positive tab of a battery cell, and the other of the cover plate assemblies has a terminal for connecting to the negative tab of another battery cell.

[0005] According to a first aspect of this application, the pole post is provided with a connecting end face at one end along the first direction, and the stud is provided on the connecting end face; The distance between the threaded sleeve and the connecting end face along the first direction is A, and A satisfies: 0≤A≤20mm.

[0006] According to a first aspect of this application, the length of the threaded section of the sleeve and the same stud along the first direction is B, and B satisfies: 2mm≤B≤50mm.

[0007] According to a first aspect of this application, an insulating region is formed between the two cover plate bodies; The sealing element includes: A first sealing ring is fitted onto the pole post. The first sealing ring is located on the side of the cover plate body away from the insulating area. A portion of the first sealing ring is located between the pole post and the inner wall of the mounting hole. The second sealing ring is sleeved on the pole post. The second sealing ring is located on the side of the cover plate body near the insulating area. A portion of the second sealing ring is located between the pole post and the inner wall of the mounting hole.

[0008] According to a first aspect of this application, the cover plate assembly further includes: A first plastic component is disposed on the side of the cover plate body away from the insulating area, and the first plastic component is sleeved on the first sealing ring.

[0009] According to a first aspect of this application, the cover plate assembly further includes: A fixing block is disposed on the side of the first plastic part away from the cover plate body, and the fixing block is sleeved on the pole post; wherein, the first sealing ring is disposed between the fixing block and the cover plate body.

[0010] According to a first aspect of this application, the first plastic part has a first recess on the side away from the cover plate body, and a portion of the fixing block is disposed in the first recess.

[0011] According to a first aspect of this application, the cover plate body has a second recess on the side away from the insulating area, and a portion of the first plastic part and the first sealing ring are disposed in the second recess.

[0012] According to a first aspect of this application, the pole post is provided with a first stepped surface, the second sealing ring is disposed between the cover plate body and the first stepped surface, and a portion of the insulating sleeve is disposed between the first stepped surface and the cover plate body.

[0013] Secondly, a battery pack is also provided, comprising: case; Multiple battery cells are disposed within the housing, and each battery cell is provided with a positive electrode tab and a negative electrode tab; As described in the previous embodiment, the battery cover is disposed inside the housing. For two battery cells arranged opposite each other, the terminal of one of the cover assembly is connected to the positive terminal of one of the battery cells, and the terminal of the other cover assembly is connected to the negative terminal of the other battery cell.

[0014] The battery cover and battery pack provided in this application embodiment firstly connect the terminals of two cover assemblies to each other through the threaded engagement of the screw sleeve and the stud. Then, the terminal of one cover assembly is connected to the positive electrode of one battery cell, and the terminal of the other cover assembly is connected to the negative electrode of another battery cell, thereby realizing the series connection of two battery cells. In this way, the process of connecting two battery cells in series achieves several advantages. First, it eliminates the need for busbars, reducing the number of busbars required, improving the space utilization of the battery pack, and lowering production costs and the overall weight of the cover assembly. Second, it reduces the welding process for busbars, improving production efficiency. Third, the threaded connection between the sleeve and the stud allows for a detachable connection between the two cover assemblies, facilitating quick assembly and disassembly, as well as convenient storage and transportation. Fourth, by placing a seal on the terminal post, with a portion of the seal positioned between the terminal post and the inner wall of the mounting hole, the seal prevents external foreign objects from entering the battery cell through the gap between the terminal post and the inner wall of the mounting hole. Fifth, by placing an insulating sleeve on the terminal post, positioned between the terminal post and the cover body, it prevents direct contact between the terminal post and the cover body, avoiding short-circuit accidents. Attached Figure Description

[0015] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0016] Figure 1 This is a schematic diagram of the structure of a battery cover provided for an exemplary embodiment of this application.

[0017] Figure 2 An exploded view of a battery cover provided as an exemplary embodiment of this application.

[0018] Figure 3 A cross-sectional view of a battery cover provided for an exemplary embodiment of this application.

[0019] Figure 4 This is a schematic diagram of the structure of the second sealing ring provided for an exemplary embodiment of this application.

[0020] Figure 5 This is a schematic diagram of the structure of a first plastic part provided for an exemplary embodiment of this application.

[0021] Figure 6 A schematic diagram of the cover plate body provided in an exemplary embodiment of this application from a first-view perspective.

[0022] Figure 7 A schematic diagram of the cover plate body provided in an exemplary embodiment of this application from a second perspective.

[0023] Figure 8 This is a schematic diagram of the structure of a pole provided for an exemplary embodiment of this application.

[0024] Figure 9 A cross-sectional view of a battery cover provided for another exemplary embodiment of this application.

[0025] Reference numerals: 100-Battery cover; 110-Cover assembly; 111-Cover body; 1111-Mounting hole; 1112-Second recess; 1113-Third recess; 112-Terminal post; 1121-Connecting end face; 1122-First stepped surface; 113-Seal; 1131-First sealing ring; 1132-Second sealing ring; 11321-First sealing section; 11322-Second sealing section; 114-Insulating sleeve; 115-Stud; 116-Insulating area; 117-First plastic part; 1171-First recess; 118-Fixing block; 119-Second plastic part; 120-Threaded sleeve. Detailed Implementation

[0026] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein.

[0027] This application provides a battery pack, which may include a casing, multiple battery cells, and a battery cover 100. Figure 1 As shown in the figure, multiple battery cells and a battery cover 100 are disposed inside the housing. The battery cells are provided with positive and negative tabs at opposite ends. For two battery cells arranged opposite each other, the battery cover 100 can connect the positive and negative tabs of the two battery cells respectively, so as to connect the two battery cells in series.

[0028] Specifically, Figure 1 This is a schematic diagram of the structure of a battery cover provided for an exemplary embodiment of this application. Figure 2 An exploded view of a battery cover provided as an exemplary embodiment of this application. Figure 3 A cross-sectional view of a battery cover provided for an exemplary embodiment of this application. Figures 1 to 3 As shown, the battery cover 100 provided in this embodiment may include two cover assemblies 110 and a screw sleeve 120, with the two cover assemblies 110 along a first direction (refer to...). Figure 1 and Figure 3The two battery cells are relatively distributed (in the Z-axis direction) and the screw sleeve 120 is disposed between the two cover plate assemblies 110. The two cover plate assemblies 110 are connected by the screw sleeve 120. For two battery cells that are relatively disposed, one cover plate assembly 110 can be connected to the positive electrode of one battery cell, and the other cover plate assembly 110 can be connected to the negative electrode of the other battery cell, thereby connecting the two battery cells in series.

[0029] It should be noted that using two cover plate assemblies 110 to connect two battery cells in series can not only reduce the number of busbars used and production costs, but also reduce the welding process of the busbars and improve work efficiency.

[0030] It should be noted that in this embodiment, the two cover plate assemblies 110 have similar structures; the following description uses one of the cover plate assemblies 110 as an example. Figures 1 to 3 As shown, the cover plate assembly 110 may include a cover plate body 111 and a pole post 112. The cover plate body 111 is provided with a mounting hole 1111. A portion of the pole post 112 is disposed in the mounting hole 1111. The two ends of the pole post 112 protrude relative to the cover plate body 111 along the first direction, so that the pole post 112 can be conveniently welded to the positive electrode (or negative electrode).

[0031] In practical applications, one of the cover plate assemblies 110 has its terminal 112 connected to the positive tab of one battery cell, and the other cover plate assembly 110 has its terminal connected to the negative tab of another battery cell. One end of the terminal 112 along a first direction is provided with a stud 115. One end of a threaded sleeve 120 is threadedly engaged with the stud 115 on one of the terminal assemblies 112, and the other end of the threaded sleeve 120 is threadedly engaged with the stud 115 on the other terminal 112. Thus, through the threaded engagement between the threaded sleeve 120 and the stud 115, the two cover plate assemblies 110 can be connected to each other, thereby enabling the two battery cells to be connected in series.

[0032] It should be noted that in the process of connecting the two cover plate assemblies 110 to each other using the screw sleeve 120, on the one hand, there is no need to use a busbar, which can reduce the number of busbars used, improve the space utilization of the battery pack, and reduce production costs and the overall weight of the cover plate assembly 110; on the other hand, it can reduce the welding process of the busbar and improve production efficiency.

[0033] It should be noted that the two cover plate assemblies 110 are detachably connected by screw sleeves 120, which facilitates the quick assembly and disassembly of the two cover plate assemblies 110, and also facilitates their classification, storage and transportation.

[0034] In one embodiment, there are multiple threaded sleeves 120, and each pole post 112 has multiple studs 115, which are the same number as the number of threaded sleeves 120. The multiple studs 115 and multiple threaded sleeves 120 are threadedly engaged in a one-to-one correspondence, which can improve the connection stability between the two cover plate assemblies 110 and ensure that the current is stably transmitted between the two pole posts 112.

[0035] In one embodiment, the terminal post 112 in one of the cover plate assemblies 110 is a positive terminal post, which is welded to the positive tab of one of the battery cells. The terminal post 112 in the other cover plate assembly 110 is a negative terminal post, which is welded to the negative tab of another battery cell. The positive terminal post and the positive tab are made of aluminum, which can improve the welding quality between the positive terminal post and the positive tab. The negative electrode post consists of an aluminum layer and a copper layer, which are connected. A stud 115 is provided at the end of the aluminum layer near the positive electrode post. The copper layer is welded to the negative electrode lug (made of metallic copper), which can improve the welding quality between the negative electrode post and the negative electrode lug. The threaded sleeve 120 is made of metallic aluminum. One end of the threaded sleeve 120 is threaded with the stud 115 on the positive electrode post, and the other end of the threaded sleeve 120 is threaded with the stud 115 on the aluminum layer. The threaded sleeve 120, the stud 115 on the positive electrode post, and the stud 115 on the aluminum layer are all made of metallic aluminum. In this way, after the three are threaded together, the problem of electrochemical corrosion caused by the use of different metals can be prevented, which can effectively improve the structural strength of the threaded connection and extend the service life.

[0036] In one embodiment, the terminal post 112 in one of the cover plate assemblies 110 is a positive terminal post, which is welded to the positive tab of one of the battery cells. The terminal post 112 in the other cover plate assembly 110 is a negative terminal post, which is welded to the negative tab of another battery cell. The negative terminal post and the negative tab are made of copper, which can improve the welding quality between the negative terminal post and the negative tab. The positive electrode post consists of a copper layer and an aluminum layer, which are connected. A stud 115 is provided at the end of the copper layer near the negative electrode post. The aluminum layer is welded to the positive electrode lug (made of aluminum metal), which can improve the welding quality between the positive electrode post and the positive electrode lug. The threaded sleeve 120 is made of copper metal. One end of the threaded sleeve 120 is threaded with the stud 115 on the negative electrode post, and the other end of the threaded sleeve 120 is threaded with the stud 115 on the copper layer. The threaded sleeve 120, the stud 115 on the negative electrode post, and the stud 115 on the copper layer are all made of copper metal. In this way, after the three are threaded together, the problem of electrochemical corrosion caused by the use of different metals can be prevented, which can effectively improve the structural strength of the threaded connection and extend the service life.

[0037] like Figure 3 As shown, the cover plate assembly 110 may also include a seal 113, which is sleeved on the pole post 112, and a portion of the seal 113 is disposed between the pole post 112 and the inner wall of the mounting hole 1111.

[0038] It should be noted that the seal 113 can prevent external foreign objects from entering the battery cell through the gap between the inner wall of the terminal post 112 and the mounting hole 1111, thus protecting the battery cell.

[0039] like Figure 3 As shown, the cover plate assembly 110 may also include an insulating sleeve 114, which is sleeved on the pole post 112. A portion of the insulating sleeve 114 is located between the pole post 112 and the cover plate body 111. The insulating sleeve 114 can block the pole post 112 and the cover plate body 111, prevent the pole post 112 and the cover plate body 111 from directly contacting each other, and avoid short circuit accidents.

[0040] The battery cover 100 and battery pack provided in this application embodiment firstly connect the terminals 112 of two cover assemblies 110 to each other through the threaded engagement of the sleeve 120 and the stud 115. Then, the terminal 112 of one cover assembly 110 is connected to the positive electrode of one battery cell, and the terminal 112 of the other cover assembly 110 is connected to the negative electrode of another battery cell, thus realizing the series connection of two battery cells. In this way, in the process of realizing the series connection of two battery cells, on the one hand, it is not necessary to use a busbar, which can reduce the number of busbars used, improve the space utilization of the battery pack, and reduce production costs and the overall weight of the cover assembly 110; on the other hand, it can reduce the welding process of the busbar and improve production efficiency. Secondly, the threaded engagement of the sleeve 120 and the stud 115 enables the two cover assemblies 110 to be detachably connected, which can facilitate the quick assembly and disassembly of the two cover assemblies 110, and also facilitates classified storage and transportation. Third, by sleeved on the terminal post 112, with a portion of the seal 113 located between the terminal post 112 and the inner wall of the mounting hole 1111, the seal 113 can prevent external foreign objects from entering the battery cell through the gap between the terminal post 112 and the inner wall of the mounting hole 1111. Fourth, by sleeved on the terminal post 112, with the insulating sleeve 114 located between the terminal post 112 and the cover plate body 111, the seal 114 can prevent the terminal post 112 and the cover plate body 111 from directly contacting each other, thus avoiding short circuit accidents.

[0041] like Figure 3 As shown, an insulating region 116 is formed between the two cover plate bodies 111. The insulating region 116 can prevent the two cover plate bodies 111 from directly contacting each other and avoid short circuit accidents.

[0042] like Figure 2 and Figure 3As shown, the sealing element 113 may include a first sealing ring 1131 and a second sealing ring 1132. Both the first sealing ring 1131 and the second sealing ring 1132 are sleeved on the pole post 112. The first sealing ring 1131 is located on the side of the cover plate body 111 away from the insulating area 116, and a portion of the first sealing ring 1131 is located between the pole post 112 and the inner wall of the mounting hole 1111. The second sealing ring 1132 is located on the side of the cover plate body 111 close to the insulating area 116, and a portion of the second sealing ring 1132 is located between the pole post 112 and the inner wall of the mounting hole 1111.

[0043] It should be noted that the second sealing ring 1132 can prevent external foreign objects from entering the area between the terminal 112 and the inner wall of the mounting hole 1111, while the first sealing ring 1131 can prevent foreign objects between the terminal 112 and the inner wall of the mounting hole 1111 from intruding into the battery cell. In other words, the first sealing ring 1131 and the second sealing ring 1132 work together to form a two-stage sealing structure, which can effectively improve the sealing effect.

[0044] It should be noted that the first sealing ring 1131 and the second sealing ring 1132 have the same structure. The following description uses the second sealing ring 1132 as an example to introduce its specific structure.

[0045] Figure 4 This is a schematic diagram of the structure of a second sealing ring provided for an exemplary embodiment of this application. Figure 4 As shown, the second sealing ring 1132 may include a first sealing section 11321 and a second sealing section 11322. The second sealing section 11322 abuts against the cover plate body 111. The outer diameter of the first sealing section 11321 is smaller than the outer diameter of the second sealing section 11322. In this way, on the one hand, the first sealing section 11321 can be easily filled between the pole post 112 and the inner wall of the mounting hole 1111, thereby improving the sealing performance; on the other hand, the stepped structure between the first sealing section 11321 and the second sealing section 11322 can be engaged with the cover plate body 111, thereby improving the assembly stability of the second sealing ring 1132.

[0046] Figure 5 This is a schematic diagram of the structure of a first plastic part provided for an exemplary embodiment of this application. Figure 2 , Figure 3 and Figure 5 As shown, the cover plate assembly 110 may also include a first plastic part 117, which is disposed on the side of the cover plate body 111 away from the insulating area 116, and the first plastic part 117 is sleeved on the first sealing ring 1131.

[0047] In practical applications, the first plastic part 117 can block the end of the cover body 111 from the end of the battery cell, preventing the cover body 111 from directly contacting the end of the battery cell and avoiding short circuit accidents.

[0048] like Figure 2 and Figure 3 As shown, the cover plate assembly 110 may also include a fixing block 118, which is located on the side of the first plastic part 117 away from the cover plate body 111, and is sleeved on the pole post 112.

[0049] It should be noted that in practical applications, the fixing block 118 can be used to connect the positive or negative tab of the battery cell. The fixing block 118 can increase the area of ​​the weldable region of the pole 112, which can improve the problems of spatter and uneven penetration during the welding process, and improve the welding quality and reliability.

[0050] It should be noted that a portion of the first plastic part 117 is located between the fixing block 118 and the cover plate body 111, which can block the fixing block 118 and the cover plate body 111, prevent the fixing block 118 from directly contacting the cover plate body 111, and avoid short circuit accidents.

[0051] It should be noted that the first sealing ring 1131 is located between the fixing block 118 and the cover plate body 111. The first sealing ring 1131 is pressed against the fixing block 118 and the cover plate body 111, causing elastic deformation. This elastic deformation allows the first sealing ring 1131 to more tightly fill the gap between the pole post 112 and the inner wall of the mounting hole 1111, effectively improving the sealing performance. Furthermore, the fixing block 118 and the cover plate body 111 also limit the position of the first sealing ring 1131, ensuring it is firmly pressed between them, preventing it from moving freely and guaranteeing a long-term effective seal.

[0052] like Figure 3 and Figure 5 As shown, the first plastic part 117 has a first recess 1171 on the side away from the cover plate body 111, and a portion of the fixing block 118 is disposed in the first recess 1171. In this way, the thickness space of the first plastic part 117 along the first direction can be fully utilized, and the space occupied by the fixing block 118 outside the first recess 1171 can be reduced, thereby shortening the width of the insulation area 116 in the first direction, which is beneficial to improving the overall energy density of the battery pack.

[0053] In one embodiment, all of the fixing blocks 118 may be disposed within the first recess 1171.

[0054] In one embodiment, a portion of the fixing block 118 may be disposed within the first recess 1171, while another portion of the fixing block 118 may protrude from the first recess 1171. This allows the positive or negative electrode tab to be easily welded directly onto the fixing block 118.

[0055] Figure 6 This is a schematic diagram of the cover plate body provided in an exemplary embodiment of this application from a first-view perspective. Figure 3 and Figure 6 As shown, a second recess 1112 is provided on the side of the cover plate body 111 away from the insulating region 116, and a portion of the first plastic part 117 and the first sealing ring 1131 are disposed in the second recess 1112. In this way, the thickness space of the cover plate body 111 along the first direction can be fully utilized, and the space occupied by the first sealing ring 1131 outside the second recess 1112 can be reduced, thereby shortening the width of the insulating region 116 in the first direction, which is beneficial to improving the overall energy density of the battery pack.

[0056] In one embodiment, the first plastic part 117 is stamped on the side away from the cover plate body 111 to form a first recess 1171. The cavity of the first recess 1171 can be used to accommodate the fixing block 118. The protruding part of the first recess 1171 can be accommodated in the second recess 1112 of the cover plate body 111, thereby further reducing the space occupied by the cover plate assembly 110 along the first direction, which is beneficial to improving the overall energy density of the battery pack.

[0057] Figure 7 This is a schematic diagram of the cover plate body provided in an exemplary embodiment of this application from a second perspective. Figure 3 and Figure 7 As shown, the cover plate body 111 has a third recess 1113 on the side near the insulating region 116, and a portion of the insulating sleeve 114 is disposed within the third recess 1113. In this way, the thickness space of the cover plate body 111 along the first direction can be fully utilized, reducing the space occupied by the insulating sleeve 114 outside the third recess 1113, thereby shortening the width of the insulating region 116 in the first direction, which is beneficial to improving the overall energy density of the battery pack.

[0058] Figure 8 This is a schematic diagram of the pole structure provided for an exemplary embodiment of this application. Figure 3 and Figure 8 As shown, the pole post 112 is provided with a first stepped surface 1122, and the second sealing ring 1132 is provided between the cover plate body 111 and the first stepped surface 1122.

[0059] It should be noted that the second sealing ring 1132 is pressed against the first stepped surface 1122 and the cover plate body 111, causing the second sealing ring 1132 to undergo elastic deformation. This elastic deformation allows the second sealing ring 1132 to more tightly fill the gap between the pole post 112 and the inner wall of the mounting hole 1111, effectively improving the sealing performance. Furthermore, the first stepped surface 1122 and the cover plate body 111 also limit the position of the second sealing ring 1132, ensuring it is firmly pressed between them, preventing it from moving freely and guaranteeing a long-term effective seal.

[0060] It should be noted that a portion of the insulating sleeve 114 is located between the first step surface 1122 and the cover plate body 111. The insulating sleeve 114 can prevent the first step surface 1122 and the cover plate body 111 from directly contacting each other, thus avoiding short circuit accidents.

[0061] In one embodiment, the insulating sleeve 114 can be formed by injection molding in the area between the cover plate body 111 and the pole post 112 on the side near the region.

[0062] Figure 9 A cross-sectional view of a battery cover provided for another exemplary embodiment of this application. (See figure) Figure 9 As shown, the cover plate assembly 110 may also include a second plastic part 119. The second plastic part 119 is disposed on the side of the cover plate body 111 near the insulating area 116. The second plastic part 119 is sleeved on the insulating sleeve 114. The second plastic part 119 can insulate and block the two cover plate bodies 111 to prevent short circuit accidents between the two cover plate bodies 111.

[0063] In one embodiment, each of the two cover plate bodies 111 has a second plastic component 119 on the side near the insulating region 116. The two second plastic components 119 are positioned along a first direction (reference...) Figure 9 The overall thickness in the Z-axis direction is equal to the width of the insulating region 116 along the first direction. In this way, the two second plastic parts 119 can not only play an insulating role, but also support the two cover plate bodies 111, reducing the risk of local deformation of the cover plate bodies 111.

[0064] In one embodiment, each of the two cover plate bodies 111 has a second plastic component 119 on the side near the insulating region 116. The overall thickness of the two second plastic components 119 along the first direction is less than the width of the insulating region 116 along the first direction, thus the two second plastic components 119 serve an insulating function. Based on this, a support member can be provided between the two second plastic components 119 to support the two cover plate bodies 111. Specifically, the support member may include a support block, a support frame, a telescopic rod block, etc.

[0065] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0066] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0067] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0068] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0069] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A battery cover, characterized in that, include: Two cover plate assemblies are distributed opposite to each other along a first direction. Each cover plate assembly includes a cover plate body, a pole, a sealing element, and an insulating sleeve. The cover plate body has a mounting hole. A portion of the pole is disposed in the mounting hole. The pole protrudes from the cover plate body at opposite ends along the first direction. A stud is provided at one end of the pole along the first direction. The sealing element is sleeved on the pole. A portion of the sealing element is disposed between the pole and the inner wall of the mounting hole. The insulating sleeve is sleeved on the pole. A portion of the insulating sleeve is disposed between the pole and the cover plate body. A threaded sleeve is disposed between the two cover plate assemblies, one end of the threaded sleeve is threadedly engaged with a stud on one of the pole posts, and the other end of the threaded sleeve is threadedly engaged with a stud on the other pole post; One of the cover plate assemblies has a terminal for connecting to the positive tab of a battery cell, and the other of the cover plate assemblies has a terminal for connecting to the negative tab of another battery cell.

2. The battery cover according to claim 1, characterized in that, The pole post is provided with a connecting end face at one end along the first direction, and the stud is provided on the connecting end face; The distance between the threaded sleeve and the connecting end face along the first direction is A, and A satisfies: 0≤A≤20mm.

3. The battery cover according to claim 1, characterized in that, The length of the threaded section of the sleeve and the same stud along the first direction is B, and B satisfies: 2mm≤B≤50mm.

4. The battery cover according to any one of claims 1 to 3, characterized in that, An insulating area is formed between the two cover plate bodies; The sealing element includes: A first sealing ring is fitted onto the pole post. The first sealing ring is located on the side of the cover plate body away from the insulating area. A portion of the first sealing ring is located between the pole post and the inner wall of the mounting hole. The second sealing ring is sleeved on the pole post. The second sealing ring is located on the side of the cover plate body near the insulating area, and a portion of the second sealing ring is located between the pole post and the inner wall of the mounting hole.

5. The battery cover according to claim 4, characterized in that, The cover plate assembly also includes: A first plastic component is disposed on the side of the cover plate body away from the insulating area, and the first plastic component is sleeved on the first sealing ring.

6. The battery cover according to claim 5, characterized in that, The cover plate assembly also includes: A fixing block is disposed on the side of the first plastic part away from the cover plate body, and the fixing block is sleeved on the pole post; wherein, the first sealing ring is disposed between the fixing block and the cover plate body.

7. The battery cover according to claim 6, characterized in that, The first plastic part has a first recess on the side away from the cover plate body, and a portion of the fixing block is located in the first recess.

8. The battery cover according to claim 5, characterized in that, The cover plate body has a second recess on the side away from the insulating area, and a portion of the first plastic part and the first sealing ring are disposed in the second recess.

9. The battery cover according to claim 4, characterized in that, The pole post has a first stepped surface, the second sealing ring is disposed between the cover plate body and the first stepped surface, and a portion of the insulating sleeve is disposed between the first stepped surface and the cover plate body.

10. A battery pack, characterized in that, include: case; Multiple battery cells are disposed within the housing, and each battery cell is provided with a positive electrode tab and a negative electrode tab; The battery cover plate as described in any one of claims 1 to 9 is disposed within the housing, wherein for two battery cells disposed opposite to each other, the terminal post of one of the cover plate assemblies is connected to the positive terminal tab of one of the battery cells, and the terminal post of the other cover plate assembly is connected to the negative terminal tab of the other battery cell.

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