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Current collector, battery pole piece and current collector manufacturing method

A current collector and electrical connection technology, which is applied in the production of battery pole pieces and current collectors, and in the field of current collectors, can solve problems such as poor performance of high energy density batteries, and achieve the effect of reducing polarization and improving charge and discharge performance.

Active Publication Date: 2021-06-25
ZHUHAI COSMX BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of this application is to provide a current collector, a battery pole piece and a method for making a current collector, which can solve the problem of poor performance of high energy density batteries in the related art

Method used

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  • Current collector, battery pole piece and current collector manufacturing method
  • Current collector, battery pole piece and current collector manufacturing method
  • Current collector, battery pole piece and current collector manufacturing method

Examples

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Embodiment Construction

[0036] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, and are only for explaining the present application, and should not be construed as limiting the present application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0037] The features of the terms "first" and "second" in the description and claims of the present application may explicitly or implicitly include one or more of these features. In the description of the present application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification ...

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Abstract

The invention discloses a current collector, a battery pole piece and a current collector manufacturing method, and belongs to the technical field of batteries. The current collector comprises a first current collector layer, a first plating layer, a second plating layer and a second current collector layer which are sequentially stacked, wherein an inner cavity is formed between the first plating layer and the second plating layer, and the first plating layer and the second plating layer are supported and connected through a supporting column; and the current collector further comprises a through hole, the through hole sequentially penetrates through the first current collector layer, the first plating layer, the second plating layer and the second current collector layer, and the through hole is communicated with the inner cavity. Therefore, the compaction density of an active material on the current collector can be reduced, the polarization of the battery is reduced, and the purpose of improving the charge-discharge performance of the battery is achieved.

Description

technical field [0001] The present application belongs to the field of battery technology, and in particular relates to a current collector, a battery pole piece and a method for making the current collector. Background technique [0002] In the related art, aluminum foil is used as a current collector for the battery positive plate, and copper foil is used as the current collector for the negative plate of the battery. However, with the continuous improvement of the energy density of the battery, the design area density and compaction density of the battery pole piece are becoming more and more limited, resulting in an increasing polarization of the positive and negative electrodes during the use of the battery, which in turn affects the performance of the battery. [0003] It can be seen that the high energy density battery in the related art has the problem of poor performance. Contents of the invention [0004] The purpose of the present application is to provide a cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M4/13H01M4/70
CPCH01M4/667H01M4/661H01M4/13H01M4/70H01M2004/028Y02E60/10
Inventor 余正发彭冲胡贤飞许延苹李俊义
Owner ZHUHAI COSMX BATTERY CO LTD
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