Current collector, battery pole piece and method for making current collector

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 the problems of poor performance of high-energy-density batteries, achieve the effects of reducing polarization and improving charge and discharge performance

Active Publication Date: 2022-05-03
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 method for making current collector
  • Current collector, battery pole piece and method for making current collector
  • Current collector, battery pole piece and method for making current collector

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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 application discloses a current collector, a battery pole piece and a method for making the current collector, which belong to the technical field of batteries. The current collector includes: a first current collector layer, a first coating layer, a second coating layer and a second current collector layer stacked in sequence, there is an inner cavity between the first coating layer and the second coating layer, and the The first coating layer and the second coating layer are supported and connected by supporting columns; wherein, the current collector further includes through holes, and the through holes sequentially penetrate through the first current collector layer, the first coating layer, and the second coating layer. The plating layer and the second current collector layer, and the through hole communicates with the inner cavity. In this way, the compaction density of the active material on the current collector can be reduced, the polarization of the battery can be reduced, and the purpose of improving the charging and discharging performance of the battery can be 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 Patents(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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