KR-102964203-B1 - Current collection structures, batteries, and electrical devices

Abstract

The present application provides a current collection structure and relates to the technical field of manufacturing lithium-ion batteries. The current collection structure comprises a current collection member—the current collection member includes a first connecting end, a second connecting end, and a bending portion, and the bending portion connects the first connecting end and the second connecting end—; and a guide member—a weak portion is installed in the guide member, and the bending resistance strength of the weak portion is smaller than the bending resistance strength of other portions excluding the weak portion of the guide member, the guide member is combined with the current collection member, the weak portion corresponds to the position of the bending portion, and the guide member is intended to guide the positional bending of the bending portion at the weak portion. Since the bending resistance strength of the weak portion is smaller than the bending resistance strength of other regions of the guide member, in the process of performing bending on the current collection member, the guide member performs bending at the weak portion, and since the position of the weak portion corresponds to the position of the bending portion, the guide member guides the positional bending of the current collection member at the bending portion.

Inventors

• 청, 싱
• 수, 화성
• 우, 용빈
• 진, 이쾅
• 뉴, 샤오쥔

Assignees

• 컨템포러리 엠퍼렉스 테크놀로지 씨오., 리미티드

Dates

Publication Date

20260512

Application Date

20231214

Priority Date

20230620

Claims (17)

1. As a current collection structure, Current collecting member - the current collecting member includes a first connecting end, a second connecting end and a bending part, and the bending part connects the first connecting end and the second connecting end - ; and A current collection structure characterized by including: a guide member - a weak portion is installed in the guide member, the bending resistance strength of the weak portion is lower than the bending resistance strength of other parts of the guide member excluding the weak portion, the guide member is installed on at least one side of the current collection member, the weak portion corresponds to the position of the bending portion, and the guide member is intended to guide the position bending of the bending portion at the weak portion.
2. In paragraph 1, A current collection structure characterized in that the current collection member comprises at least two current collection layers, the at least two current collection layers are stacked and installed along the thickness direction of the current collection member, and the guide member is installed in at least one of the current collection layers.
3. In paragraph 2, A current collection structure characterized in that the above guide member is installed between at least one pair of adjacent current collection layers.
4. In paragraph 1, A current collection structure characterized in that the current collection member is a conductive structure and the guide member is an insulating structure.
5. In paragraph 4, A current collection structure characterized in that the material of the guide member comprises at least one of polypropylene (PP), polyethylene terephthalate (PET), polyethylene (PE), polyvinyl chloride (PVC), polytetrafluoroethylene (PTFE), ethylene-vinyl acetate copolymer (EVA), and rubber.
6. In paragraph 1, A current collection structure characterized in that both the current collection member and the guide member are conductive structures.
7. In paragraph 1, A current collection structure characterized in that the guide member is attached to the current collection member; at least one of which is bonded to the current collection member and at least one of which is welded to the current collection member.
8. In paragraph 1, A current collection structure characterized in that at least a portion of the guide member and at least a portion of the current collection member come into contact with each other under the action of an external force.
9. In paragraph 1, At least a portion of the above-mentioned vulnerable part is a thinning area; A current collection structure characterized in that the thickness of at least some of the above-mentioned thinning regions is smaller than the thickness of other parts of the above-mentioned vulnerable portion excluding the above-mentioned thinning regions, or, at least some of the above-mentioned thinning regions are a cavity structure.
10. In Paragraph 9, A current collection structure characterized in that at least a portion of the above-mentioned thinning area is installed in a first direction at at least one end of the above-mentioned weak portion, and the first direction is parallel to the extension direction of the above-mentioned bending portion.
11. In Paragraph 9, A current collection structure characterized in that at least a portion of the above-mentioned thinning area is installed in a first direction in the middle of the above-mentioned weak portion, and the first direction is parallel to the extension direction of the above-mentioned bending portion.
12. In paragraph 1, A current collection structure characterized by the above guide member having an integral molded structure.
13. As a battery cell, Electrode terminal; Electrode component; and A battery cell comprising a current collection structure according to any one of claims 1 to 12, wherein one end of the current collection structure is connected to the electrode terminal and the other end of the current collection structure is connected to the electrode component.
14. In Paragraph 13, A battery cell characterized in that the above battery cell is a cylindrical battery or a prismatic battery.
15. As a battery, A battery characterized by including a battery cell according to Clause 13.
16. As an electrical device, An electric device characterized by including a battery according to Clause 15.
17. delete

Description

Current collection structures, batteries, and electrical devices This application requests priority to Chinese patent application 202310732456.6, titled "Current collection structure, battery and electric device," filed on June 20, 2023, and incorporates the entire contents of said application into the text. The present application relates to the field of lithium-ion battery manufacturing technology, and specifically, to current collection structures, batteries, and electrical devices. Rechargeable batteries have already been widely used in electric vehicles, mobile installations, and various power tools due to their advantages, such as high energy density, high power density, a high number of cycles, and long storage time. Currently, in the case of batteries, since there are certain limitations on the thickness and hardness of the current collection structure when connecting the battery tab and electrode terminal using the structure, bending treatment must generally be performed on the current collection structure. To further clarify the technical methods of the embodiments of the present application, the attached drawings to be used in the embodiments are briefly introduced below. Since the attached drawings below merely illustrate some embodiments of the present application, they should not be construed as a limitation on the scope, and it should be understood that a person skilled in the art can obtain other related attached drawings based on these attached drawings without requiring creative labor. FIG. 1 is an example diagram of the structure of a vehicle provided in an embodiment of the present application. FIG. 2 is an example diagram of the structure of a battery provided in an embodiment of the present application. FIG. 3 is an example diagram of the structure of a battery cell provided in an embodiment of the present application. FIG. 4 is an exploded perspective view of an end cover component provided in an embodiment of the present application. FIG. 5 is an example diagram of the structure of a current collection structure provided in an embodiment of the present application. FIG. 6 is an example diagram of the structure of a current collection member provided in an embodiment of the present application. FIG. 7 is an example diagram of the structure of a guide member provided in an embodiment of the present application. FIG. 8 is an example diagram of the structure of another guide member provided in an embodiment of the present application. FIG. 9 is a side view of a current collection structure provided in an embodiment of the present application. FIG. 10 is a side view of another current collection structure provided in an embodiment of the present application. FIG. 11 is a side view of another current collection structure provided in an embodiment of the present application. The embodiments of the technical solution of the present application are described in detail below in conjunction with the drawings. The embodiments below are intended merely to more clearly explain the technical solution of the present application and are used as examples; they do not limit the scope of protection of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as generally understood by a person skilled in the art of this application; terms used herein are merely for the purpose of describing specific embodiments and are not intended to limit this application; and the terms “include” and “comprising” and all variations thereof in the specification, claims, and description of the drawings of this application are intended to include non-exclusive inclusions. In the description of the embodiments of this application, technical terms such as "first," "second," etc., are intended merely to distinguish different objects and should not be understood as indicating or implying relative importance, or implying the number of designated technical features, a specific order, or major and minor relationships. Unless otherwise clearly and specifically limited, in the description of the embodiments of this application, "plural" means two or more. References to "Examples" in this specification mean that specific features, structures, or properties described in combination with the Examples may be included in at least one Example of this application. The appearance of such phrase at each location in the specification does not necessarily refer to the same Example, nor are they independent or alternative Examples mutually exclusive from other Examples. Those skilled in the art understand clearly and implicitly that the Examples described herein may be combined with other Examples. In the description of the embodiments of the present application, the term "at least one of..." is used merely to describe the association of related objects and implies that three relationships may exist; for example, "at least one of A and B" means three cases where A exists independe