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Pole piece, winding battery cell and battery

A pole piece and cell technology, applied in the battery field, can solve problems such as battery short circuit

Pending Publication Date: 2022-06-03
ZHUHAI COSMX BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The application provides a pole piece, a wound battery cell and a battery, which can solve the problem that the burrs on the current collector penetrate the separator and cause a short circuit inside the battery

Method used

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  • Pole piece, winding battery cell and battery
  • Pole piece, winding battery cell and battery
  • Pole piece, winding battery cell and battery

Examples

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Embodiment Construction

[0043] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as recited in the appended claims.

[0044] The battery 100 in this embodiment of the present application may include a lithium-ion secondary battery, a lithium-sulfur battery, or a sodium-lithium-ion battery, etc., which is not limited in this application. The battery 100 is generally divided into a prismatic battery and a soft pack battery according to the packaging method, which is not limited in this application.

[0045] The d...

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Abstract

The invention provides a pole piece, a winding battery cell and a battery. The pole piece comprises a current collector, an active material layer and an insulating layer. The current collector comprises two opposite surfaces. At least one of the two surfaces of the current collector is provided with an active material layer. Along the length direction of the current collector, the current collector comprises an empty foil region exceeding the active material layer. The active material layer and the insulating layer are provided in the longitudinal direction. And one part of the insulating layer is lapped with the empty foil region, and the other part is lapped with the active material layer. The insulating layer covers an edge of the active material layer. The pole piece can solve the problem that burrs on the current collector penetrate through the diaphragm to cause short circuit in the battery.

Description

technical field [0001] The present application relates to the technical field of batteries, and in particular, to a pole piece, a wound cell and a battery. Background technique [0002] Due to their high energy density, low self-discharge, and good cyclability, batteries are widely used in smartphones, power tools, and new energy vehicles. However, the battery has certain safety hazards, and the safety of the battery has always restricted the process of power battery industrialization. [0003] Batteries include cells. The battery cell includes a positive electrode sheet, a separator and a negative electrode sheet. The positive electrode sheet, the separator and the negative electrode sheet can be formed into a roll core by a winding process. The separator is used to insulate the positive electrode sheet and the negative electrode sheet. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer. The posit...

Claims

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Application Information

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IPC IPC(8): H01M4/13H01M50/586H01M50/59H01M10/0587H01M10/0525
CPCH01M4/13H01M50/586H01M50/59H01M10/0587H01M10/0525Y02P70/50
Inventor 陈申宋轩周乔熊家庚田生
Owner ZHUHAI COSMX BATTERY CO LTD
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