Battery cell cover plate, battery cell and battery module

Abstract

The utility model provides a battery cell cover plate, a battery cell and a battery module, and belongs to the field of battery cell structures. The battery cell cover plate comprises a pole column, wherein a main body and a limiting part positioned at the end part of the main body are formed on the pole column; the pressing assembly is arranged on the outer side portion of the main body in a sleeving mode, assembly holes corresponding to the pole columns and the pressing assembly are formed in the plate body assembly, and when the pole columns and the pressing assembly are correspondingly connected with the assembly holes, the plate body assembly is connected with the main body. The limiting part and the plate body assembly are located at the top and the bottom of the pressing assembly respectively and abut against the pressing assembly.

Description

Technical Field

[0001] The present application relates to the field of battery cell structures, and in particular to a battery cell cover, a battery cell and a battery module. Background Art

[0002] The cover is the core component of the battery cell. The existing cover consists of a cover body, a plastic gasket, a pole and a rivet sheet, which are connected together by injection molding and then riveting, so that the plastic is fixed between the cover body and the battery pole, and the plastic gasket plays a role of sealing and insulation. However, the disadvantage of the existing riveting method is that an additional rivet sheet needs to be set to connect with the battery pole. Therefore, during assembly, the rivet sheet needs to be positioned on the battery pole before riveting. There are many assembly processes and the component cost is high. Utility Model Content

[0003] In view of this, the purpose of the present application is to provide a battery cover, a battery cell and a battery module to solve the problem that the existing cover assembly method using riveting has more assembly steps and higher costs.

[0004] According to the above purpose, the first aspect of the present utility model provides a battery cover, wherein the battery cover comprises:

[0005] A pole, formed with a main body and a limiting portion located at an end of the main body;

[0006] A pressing assembly is sleeved on the outer side of the main body, and

[0007] The plate assembly is formed with an assembly hole corresponding to the pole and the press-fit assembly. When the pole and the press-fit assembly are connected correspondingly to the assembly hole, the limiting portion and the plate assembly are respectively located at the top and bottom of the press-fit assembly and abut against the press-fit assembly.

[0008] Preferably, the main body is formed into a columnar structure; the limiting portion includes a first limiting portion and a second limiting portion, and the first limiting portion and the second limiting portion are respectively located at the top and bottom ends of the main body in the axial direction.

[0009] Preferably, the plate assembly includes a first plate and a second plate which are sequentially attached to each other, wherein the first plate is located on top of the second plate; the first plate and the second plate are respectively formed with a first through hole and a second through hole to form the assembly hole.

[0010] Preferably, the inner wall of the first through hole is provided with a corresponding annular boss, and the bottom of the boss is flush with the bottom of the first plate body.

[0011] Preferably, when the pole and the press-fit assembly are connected correspondingly to the assembly hole, along the axial direction of the main body, the press-fit assembly is located between the first limiting portion and the boss; the bottom of the first limiting portion abuts against the top of the press-fit assembly, and the top of the boss abuts against the bottom of the press-fit assembly.

[0012] Preferably, the pressing assembly comprises a plastic ring and a pressing ring which are connected to each other correspondingly, the first limiting portion abuts against the pressing ring correspondingly, and the boss abuts against the plastic ring correspondingly.

[0013] Preferably, the cell cover plate further comprises a sealing member sleeved on the outer side of the main body.

[0014] Preferably, when the pole is connected to the assembly hole correspondingly, along the axial direction of the main body, the bottom of the sealing member abuts against the top of the second limiting portion.

[0015] According to a second aspect of the utility model, a battery cell is provided, wherein the battery cell is provided with the battery cell cover plate as described above.

[0016] According to a third aspect of the utility model, a battery module is provided, wherein the battery module is provided with the battery cell as described above.

[0017] According to the battery cover, battery and battery module of the utility model, during the installation of the battery cover, the pole is first set in the assembly hole, and then the pressing assembly is sleeved on the main body of the pole, and the limit part is punched out at the end of the main body, so that the limit part and the plate assembly are respectively located at the top and bottom of the pressing assembly and abut against the pressing assembly, so that the pressing assembly can be fixed. Compared with the existing riveting assembly method, the structure of the battery cover in the utility model does not need to use an additional riveting ring, which simplifies the process steps and reduces the production cost.

[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 It is a partial assembly schematic diagram of a battery cover according to the utility model;

[0021] Figure 2 This is a schematic diagram of the assembly of the pole and the plate assembly according to the utility model

[0022] Icons: 10 - main body; 11 - first limiting portion; 12 - second limiting portion; 20 - pressure ring; 21 - plastic ring; 23 - sealing member; 30 - first plate body; 300 - first through hole; 301 - boss; 31 - second plate body; 310 - second through hole; 311 - depression. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] 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.

[0026] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] The features of the examples described herein can 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.

[0032] According to a first aspect of the present invention, a battery cover is provided. Figure 1 to Figure 2As shown, the cell cover plate in this embodiment includes poles, press-fit components and plate components that can be assembled accordingly. In the following, the specific connection methods and functions of the above-mentioned various mechanisms of the cell cover plate according to the utility model will be described in detail.

[0033] In this embodiment, if Figure 1 to Figure 2 As shown, the pole is formed with a main body 10 and a limiting portion located at the end of the main body 10. Specifically, the main body 10 is formed into a columnar structure, and the limiting portion includes a first limiting portion 11 and a second limiting portion 12, which are respectively located at the top and bottom ends of the axial direction of the main body 10. It should be noted that when the cover plate is assembled with the battery cell housing, the top of the main body 10 is the end away from the battery cell. In addition, when the following pressing assembly is not assembled with the pole, the first limiting portion 11 is formed into a protruding structure protruding along the axial direction of the main body 10, that is, in this state, the pole is formed into a T-shaped structure to facilitate the sleeve installation of the following pressing assembly.

[0034] In addition, it should be noted that the above-mentioned limiting part and the main body 10 are integrally arranged. In the negative pole of the battery cover, the limiting part is made of copper, while the main body 10 is made of aluminum. On the one hand, the aluminum material has good plasticity, so that the first limiting part 11 can be deformed during stamping. On the other hand, the copper material can ensure the conductivity of the pole. In the positive pole of the battery cover, the main body 10 and the limiting part are both made of copper. It should be further explained that the first limiting part 11 after stamping is an annular structure located at the end of the main body 10, which can fully ensure the uniformity of the force of each part of the main body 10, avoid the generation of gaps, and thus improve the firmness of the battery cover and the battery.

[0035] In addition, if Figure 1 to Figure 2 As shown, the plate assembly includes a first plate 30 (i.e., a cover plate body) and a second plate 31 (i.e., a plastic plate) which are sequentially attached, and the first plate 30 is located on top of the second plate 31. In addition, the first plate 30 and the second plate 31 are respectively formed with a first through hole 300 and a second through hole 310. When the first plate 30 and the second plate 31 are assembled and connected, the first through hole 300 and the second through hole 310 can form an assembly hole, which is used for the corresponding assembly of the pole and the following press-fit assembly.

[0036] Specifically, Figure 2As shown, the inner wall of the first through hole 300 is provided with a corresponding annular boss 301, that is, the boss 301 extends in a direction close to the center of the first through hole 300, and the bottom of the boss 301 is flush with the bottom of the first plate body 30. In this way, when the pole and the press-fit assembly are connected to the assembly hole, along the axial direction of the main body 10, the press-fit assembly is located between the first limiting portion 11 and the boss 301, that is, the bottom of the (stamped) first limiting portion 11 abuts against the top of the press-fit assembly, and the top of the boss 301 abuts against the bottom of the press-fit assembly, thereby realizing the limiting fixation of the press-fit assembly.

[0037] More specifically, if Figure 1 As shown, the press-fit assembly includes a plastic ring 21 and a pressure ring 20 that are connected to each other. The axial cross section of the plastic ring 21 is formed into an L-shaped structure, and the pressure ring 20 can be correspondingly arranged in the open structure of the plastic ring 21, that is, the inner side wall and the bottom of the plastic ring 21 are respectively limitedly abutted with the outer side wall and the bottom of the pressure ring 20. The bottom of the above-mentioned (stamped) first limiting portion 11 abuts with the top of the press-fit assembly, which is actually the bottom of the first limiting portion 11 correspondingly abutting with the top of the pressure ring 20; similarly, the top of the above-mentioned boss 301 abuts with the bottom of the press-fit assembly, which is actually the boss 301 correspondingly abutting with the outer wall of the plastic ring 21.

[0038] In addition, in this embodiment, Figure 1 As shown, the cell cover plate also includes a seal 23 sleeved on the outer side of the main body 10. The seal 23 is formed with a large diameter end and a small diameter end. When it is sleeved on the outer side of the main body 10, the bottom of the large diameter end of the seal 23 abuts against the top of the second limit portion 12, and the small diameter end of the seal 23 extends between the inner wall of the above-mentioned boss 301 and the outer wall of the main body 10 to ensure the consistency and stability of the overall structure of the cover plate. Furthermore, a recess 311 corresponding to the second limit portion 12 is formed at the bottom of the second plate body 31, so that the accuracy, stability and assembly efficiency of the pole and plate assembly can be ensured.

[0039] According to the battery cover of the utility model, during the installation process of the battery cover, the seal 23 is first sleeved on the outer side of the main body 10, and then the main body 10 of the pole is correspondingly arranged in the assembly hole, and the second limiting portion 12 is correspondingly matched with the recess 311 of the second plate 31, and the seal 23 is fixed between the second limiting portion 12 and the boss 301. At this time, the cover needs to be pre-pressed to ensure the sealing performance of the seal 23; then the plastic ring 21 and the pressure ring 20 are sequentially sleeved on the main body 10 of the pole, and the first limiting portion 11 is punched out on the top of the main body 10 to fix the press-fit assembly through the first limiting portion 11 and the boss 301. Compared with the existing riveting assembly method, the structure of the battery cover in the utility model does not require the use of an additional riveting ring, which simplifies the process steps and reduces the production cost.

[0040] According to a second aspect of the utility model, a battery cell is provided, wherein the battery cell is provided with the battery cell cover plate as described above.

[0041] According to a third aspect of the utility model, a battery module is provided, wherein the battery module is provided with the battery cell as described above.

[0042] 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 pole, formed with a main body and a limiting portion located at an end of the main body; A pressing assembly is sleeved on the outer side of the main body, and The plate assembly is formed with an assembly hole corresponding to the pole and the press-fit assembly. When the pole and the press-fit assembly are connected correspondingly to the assembly hole, the limiting portion and the plate assembly are respectively located at the top and bottom of the press-fit assembly and abut against the press-fit assembly.

2. The cell cover plate according to claim 1, characterized in that: The main body is formed into a columnar structure; the limiting portion includes a first limiting portion and a second limiting portion, and the first limiting portion and the second limiting portion are respectively located at the top and bottom ends of the main body in the axial direction.

3. The cell cover plate according to claim 2, characterized in that: The plate assembly includes a first plate and a second plate which are sequentially attached to each other, wherein the first plate is located on top of the second plate; the first plate and the second plate are respectively formed with a first through hole and a second through hole to form the assembly hole.

4. The cell cover plate according to claim 3, characterized in that: The inner wall of the first through hole is provided with a corresponding annular boss, and the bottom of the boss is flush with the bottom of the first plate body.

5. The cell cover plate according to claim 4, characterized in that: When the pole and the press-fit assembly are connected correspondingly to the assembly hole, the press-fit assembly is located between the first limiting portion and the boss along the axial direction of the main body; the bottom of the first limiting portion abuts against the top of the press-fit assembly, and the top of the boss abuts against the bottom of the press-fit assembly.

6. The cell cover plate according to claim 5, characterized in that: The press-fit assembly comprises a plastic ring and a pressure ring which are connected to each other correspondingly, the first limiting portion is in contact with the pressure ring correspondingly, and the boss is in contact with the plastic ring correspondingly.

7. The cell cover plate according to claim 4, characterized in that: The cell cover plate further includes a sealing member sleeved on the outer side of the main body.

8. The cell cover plate according to claim 7, characterized in that: When the pole is connected to the assembly hole correspondingly, along the axial direction of the main body, the bottom of the sealing member abuts against the top of the second limiting portion.

9. A battery cell, characterized in that: The battery cell is provided with a battery cell cover according to any one of claims 1 to 8.

10. A battery module, characterized in that: The battery module is provided with the battery cell as claimed in claim 9.

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