Battery cell cover plate
By adopting a split pole column assembly structure and the design of fuses directly at the welding station, the problem of many parts and difficult specifications of existing battery cell cover plates is solved, and the effect of flexible specification adjustment and cost reduction is achieved.
Patent Information
- Application Number
- CN202421505323.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-06-27
AI Technical Summary
The existing battery cell cover plates have a large number of parts, and the specifications of the base plate and pole columns are not convenient for flexible adjustment.
The split pole column assembly structure is adopted, that is, the column and the welding station are assembled and then welded, and the fuse is directly arranged at the welding station, eliminating the connection piece.
The specifications of the welding station and column are flexibly adjusted according to the specifications of the battery cell, reducing production costs and optimizing the internal space of the battery cell.
Smart Images
Figure CN222749665U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of battery cell structures, and in particular to a battery cell cover. Background Art
[0002] In the existing battery cell cover plate, a connecting piece is usually welded, and the fuse is arranged on the connecting piece, that is, the number of parts is large; in addition, the pole and the bottom plate are an integrated structure, which is not convenient for flexibly adjusting the specifications of the bottom plate and the pole. Utility Model Content
[0003] In view of this, the purpose of the present application is to provide a battery cell cover to solve the problem that the existing battery cell cover has a large number of parts and the specifications of the bottom plate and the pole are not easy to flexibly adjust.
[0004] According to the above purpose, the utility model provides a battery cover, wherein the battery cover comprises:
[0005] A plate assembly is formed with a connecting portion and an embedding groove;
[0006] A pole assembly, comprising a column and a welding platform, wherein the welding platform is formed with a welding hole corresponding to the column; a first end and a second end of the column in an axial direction are respectively connected to the connecting portion and the welding hole, and the welding platform is connected to the embedding groove; and
[0007] The fuse is arranged at the soldering station.
[0008] Preferably, the second end in the axial direction of the cylinder is formed with a first cylindrical portion and a second cylindrical portion connected in sequence, the second cylindrical portion is close to the first end of the cylinder, and the diameter of the second cylindrical portion is larger than the diameter of the first cylindrical portion; the welding hole is formed as a step-shaped through hole structure to correspond to the first cylindrical portion and the second cylindrical portion.
[0009] Preferably, the plate assembly includes a sealing ring, which is sequentially formed with a large diameter end and a small diameter end; the connecting portion includes a first assembly hole formed at the sealing ring, the first assembly hole passes through the large diameter end and the small diameter end, and the first assembly hole is adapted to correspond to the column.
[0010] Preferably, the plate assembly further includes a lower plastic, the bottom of which is formed with the embedding groove, and the bottom of which is formed with a recess; the connecting portion further includes a second assembly hole formed at the bottom of the recess, and the second assembly hole is adapted to correspond to the large diameter end.
[0011] Preferably, the outer diameter of the small diameter end is formed to be W1, the outer diameter of the large diameter end is formed to be W2, and (W2-W1)>1.8 mm.
[0012] Preferably, the inner diameter of the recess is formed to be L1, (L1-W2)>1 mm.
[0013] Preferably, the outer diameter of the second cylindrical portion is formed to be L2, (L2-W2)>1 mm.
[0014] Preferably, the welding hole is located at the second end of the length direction of the welding platform; the distance between the end face of the first end of the length direction of the welding platform and the welding hole is formed as M1, 10mm<M1<35mm; the distance between the end face of the second end of the length direction of the welding platform and the welding hole is formed as M2, 0.8mm<M1<5mm.
[0015] Preferably, the thickness of the lower plastic is formed to be H1; the distance between the bottom surface of the soldering station and the top surface of the lower plastic is formed to be H2, (H2-H1)≥0.2mm.
[0016] Preferably, an insulating sheet is further provided at the bottom of the column, and the insulating sheet can cover the weld between the column and the welding platform.
[0017] According to the battery cell cover plate of the present invention, the column and the welding platform (i.e. the above-mentioned bottom plate) in the pole assembly adopt a split structure, that is, the two are assembled correspondingly and then welded, so that the specifications of the welding platform and the column can be flexibly adjusted according to the actual specifications of the battery cell; in addition, the fuse in the battery cell cover plate is directly arranged at the welding platform, and there is no need to add other parts (such as connecting plates), which effectively reduces the production cost and effectively optimizes the space inside the battery cell.
[0018] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1 is an exploded view of a cell cover according to an embodiment of the utility model;
[0021] Figure 2 is a cross-sectional view of a cell cover according to an embodiment of the utility model;
[0022] Figure 3 It is another cross-sectional view of the battery cell cover according to an embodiment of the utility model.
[0023] Icons: 10-riveting block; 11-upper plastic; 12-plain aluminum plate; 13-lower plastic; 130-embedded groove; 131-recess; 132-second assembly hole; 14-sealing ring; 140-first assembly hole; 20-column; 200-first cylindrical portion; 201-second cylindrical portion; 21-soldering table; 210-welding hole; 22-insulating sheet; 23-fuse. DETAILED DESCRIPTION
[0024] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.
[0025] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.
[0026] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.
[0027] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.
[0028] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.
[0029] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.
[0030] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.
[0031] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.
[0032] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.
[0033] According to the utility model, a battery cover is provided, such as Figures 1 to 3As shown, the cell cover plate in this embodiment includes a plate body assembly and a pole assembly, and the pole assembly is assembled corresponding to the plate body assembly. Hereinafter, the specific structures of the above-mentioned parts of the cell cover plate according to the utility model will be described in detail.
[0034] In this embodiment, if Figure 1 to Figure 2 As shown, the plate assembly is formed with a connecting portion and an embedding groove 130 for connecting the pole assembly; the pole assembly includes a column 20 and a welding platform 21, and the welding platform 21 is formed with a welding hole 210 corresponding to the column 20, and the first end and the second end of the column 20 in the axial direction are respectively connected to the connecting portion and the welding hole 210, and the welding platform 21 is connected to the embedding groove 130.
[0035] Specifically, Figure 2 As shown, the second end of the column 20 in the axial direction is formed with a first cylindrical portion 200 and a second cylindrical portion 201 connected in sequence, the second cylindrical portion 201 is close to the first end of the column 20, and the diameter of the second cylindrical portion 201 is larger than the diameter of the first cylindrical portion 200, so that the accuracy of assembling the column 20 and the welding platform 21 can be improved. Correspondingly, the welding hole 210 of the welding platform 21 is adapted to the first cylindrical portion 200 and the second cylindrical portion 201, that is, the welding hole 210 is specifically formed with a small diameter hole and a large diameter hole corresponding to the first cylindrical portion 200 and the second cylindrical portion 201, respectively.
[0036] In this embodiment, after the second end of the column 20 is embedded in the welding hole 210 of the welding platform 21, the small diameter hole and the first cylindrical portion 200 are welded to fix them, so as to improve the strength of the overall structure of the pole assembly. Furthermore, an insulating sheet 22 is also provided at the bottom of the column 20, and the insulating sheet 22 can cover the weld between the column 20 and the welding platform 21, thereby effectively reducing the risk of overlapping between the pole assembly and the pole lug.
[0037] In this embodiment, if Figure 3 As shown, the welding hole 210 is located at the second end in the length direction of the welding platform 21; the distance between the end face of the first end in the length direction of the welding platform 21 and the welding hole 210 (the large diameter hole) is set to M1, 10mm<M1<35mm; and the distance between the end face of the second end in the length direction of the welding platform 21 and the welding hole 210 (the large diameter hole) is set to M2, 0.8mm<M1<5mm, so as to avoid deformation, breakage, etc. of the column 20 while reducing the cost as much as possible.
[0038] Furthermore, the fuse 23 is disposed on one side of the column 20 close to the first end of the soldering platform 21 , and the connection method between the fuse 23 and the soldering platform 21 can adopt the existing connection method between the fuse 23 and the connecting piece.
[0039] In addition, if Figure 1 to Figure 2As shown, the plate assembly includes a sealing ring 14, which is sequentially formed with a large diameter end and a small diameter end; the above-mentioned connecting portion includes a first assembly hole 140 formed at the sealing ring 14, the first assembly hole 140 penetrates the large diameter end and the small diameter end of the sealing ring 14, and the first assembly hole 140 is adapted to the column 20 so that the sealing ring 14 can be sleeved on the outer wall of the column 20. When the sealing ring 14 is sleeved on the outer wall of the column 20, the end surface of the large diameter end of the sealing ring 14 abuts against the top surface of the second cylindrical portion 201.
[0040] In addition, the plate assembly further includes a lower plastic 13, the bottom of which is formed with the above-mentioned embedding groove 130 for correspondingly connecting to the welding platform 21. The bottom of the embedding groove 130 is formed with a recess 131, and the above-mentioned connecting portion further includes a second assembly hole 132 formed at the bottom of the recess 131, and the second assembly hole 132 is correspondingly adapted to the large diameter end of the sealing ring 14, so that the lower plastic is correspondingly sleeved on the outer side wall of the sealing ring 14.
[0041] The outer diameter of the small diameter end of the sealing ring 14 is set to W1, and the outer diameter of the large diameter end of the sealing ring 14 is set to W2, and (W2-W1)>1.8mm should be ensured; in addition, the inner diameter of the recess 131 is set to L1, and the outer diameter of the second cylindrical portion 201 is set to L2, (L1-W2)>1mm, (L2-W2)>1mm. In this way, sufficient compression space can be left between the sealing ring 14 and the lower plastic 13, so as to ensure the consistency of the sealing end surface and not squeeze the lower plastic 13, so as to improve the sealing performance of the battery cover.
[0042] The thickness of the lower plastic 13 is set to H1, and the distance between the bottom surface of the welding platform 21 and the top surface of the lower plastic 13 is set to H2, (H2-H1)≥0.2mm, so that when the plate assembly and the pole assembly are riveted and assembled, the welding platform 21 can be accurately positioned to avoid displacement, riveting out of metal wire, etc.
[0043] It should be noted that the plate assembly further includes a riveting block 10, an upper plastic 11, and a bare aluminum plate 12. In addition, the connecting portion further includes assembly holes (such as Figure 1 to Figure 2 As shown), the above components are all existing components, so their structures and specific assembly methods of the plate components are not described in detail.
[0044] According to the battery cell cover of the present invention, the column 20 and the welding platform 21 (i.e., the above-mentioned bottom plate) in the pole assembly adopt a split structure, that is, the two are assembled correspondingly and then welded, so that the specifications of the welding platform 21 and the column 20 can be flexibly adjusted according to the actual specifications of the battery cell; in addition, the fuse 23 in the battery cell cover is directly arranged at the welding platform 21, and there is no need to add other parts (such as connecting plates), which effectively reduces the production cost and effectively optimizes the space inside the battery cell.
[0045] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims
1. A battery cell cover, characterized in that: The battery cover plate comprises: A plate assembly is formed with a connecting portion and an embedding groove; A pole assembly, comprising a column and a welding platform, wherein the welding platform is formed with a welding hole corresponding to the column; a first end and a second end of the column in an axial direction are respectively connected to the connecting portion and the welding hole, and the welding platform is connected to the embedding groove; and The fuse is arranged at the soldering station.
2. The cell cover plate according to claim 1, characterized in that: The second end of the cylinder in the axial direction is formed with a first cylindrical portion and a second cylindrical portion connected in sequence, the second cylindrical portion is close to the first end of the cylinder, and the diameter of the second cylindrical portion is larger than the diameter of the first cylindrical portion; the welding hole is formed as a stepped through hole structure to correspond to the first cylindrical portion and the second cylindrical portion.
3. The cell cover plate according to claim 2, characterized in that: The plate assembly includes a sealing ring, which is sequentially formed with a large diameter end and a small diameter end; the connecting portion includes a first assembly hole formed at the sealing ring, the first assembly hole passes through the large diameter end and the small diameter end, and the first assembly hole is adapted to correspond to the column.
4. The cell cover plate according to claim 3, characterized in that: The plate assembly also includes a lower plastic, the bottom of which is formed with the embedding groove, and the bottom of which is formed with a recess; the connecting portion also includes a second assembly hole formed at the bottom of the recess, and the second assembly hole is adapted to correspond to the large diameter end.
5. The cell cover plate according to claim 4, characterized in that: The outer diameter of the small diameter end is formed to be W1, and the outer diameter of the large diameter end is formed to be W2, (W2-W1)>1.8 mm.
6. The cell cover plate according to claim 5, characterized in that: The inner diameter of the recess is formed to be L1, (L1-W2)>1 mm.
7. The cell cover plate according to claim 5, characterized in that: The outer diameter of the second cylindrical portion is formed to be L2, (L2-W2)>1 mm.
8. The cell cover plate according to claim 4, characterized in that: The welding hole is located at the second end of the length direction of the welding platform; the distance between the end face of the first end of the length direction of the welding platform and the welding hole is formed as M1, 10mm<M1<35mm; the distance between the end face of the second end of the length direction of the welding platform and the welding hole is formed as M2, 0.8mm<M1<5mm.
9. The cell cover plate according to claim 4, characterized in that: The thickness of the lower plastic is formed to be H1; the distance between the bottom surface of the soldering station and the top surface of the lower plastic is formed to be H2, (H2-H1)≥0.2mm.
10. The battery cell cover plate according to claim 1, characterized in that: An insulating sheet is also provided at the bottom of the column, and the insulating sheet can cover the weld between the column and the welding platform.