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Battery

A battery and distance technology, used in secondary batteries, circuits, non-aqueous electrolyte battery electrodes, etc., can solve the problems of lithium precipitation, high manufacturing process precision requirements, and reduced battery safety performance, so as to improve energy density and inhibit precipitation. Effects of Lithium Phenomenon

Pending Publication Date: 2021-05-14
NINGDE AMPEREX TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, while maintaining the edge of the active material layer of the negative electrode sheet beyond the edge of the active material layer of the positive electrode sheet, the gap between the active material layer of the negative electrode sheet and the active material layer of the positive electrode sheet is as small as possible, In the manufacturing process, especially in the process of wound-type batteries, the requirements for the precision of the manufacturing process are high, otherwise it will lead to lithium precipitation on the edge of the negative pole piece of the battery, which will reduce the safety performance of the battery

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Embodiment Construction

[0043] The technical solutions in the embodiments of the present application are described clearly and in detail below, obviously, the described embodiments are only some of the embodiments of the present application, not all of the embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used in the description of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application.

[0044] Hereinafter, embodiments of the present application will be described in detail. This application may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and detailed to those skilled in ...

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Abstract

A battery includes a negative active material layer, a positive active material layer, and a separator. The positive electrode active material layer includes a first portion and a second portion connected to the first portion in the first direction. The second portion includes a first end, and the first portion includes a first surface. The first surface is connected with the second part through the first joint, the first end deviates from the first joint and is one end of the positive active material layer, and the thickness of the second part in a second direction perpendicular to the first direction is reduced from the first joint to the first end in the first direction. The negative active material layer comprises a third portion and a second end located on one side of the third portion in the first direction, and the third portion comprises a second surface which is at least partially opposite to the first surface. The first layer adheres the first end, the second portion, and the first surface, and continuously covers the first end, the second portion, and a portion of the first surface. The first layer is capable of blocking conduction of ions. According to the battery, the lithium precipitation phenomenon can be inhibited while the energy density of the battery is maintained.

Description

technical field [0001] The present application relates to a battery. Background technique [0002] Lithium-ion batteries have many advantages such as high energy density, long cycle life, high nominal voltage, low self-discharge rate, small size, and light weight, and have a wide range of applications in the field of consumer electronics. In a lithium battery, in order to suppress lithium precipitation, the size of the active material layer of the negative electrode sheet is usually larger than that of the positive electrode sheet. On the other hand, from the viewpoint of improving the energy density of the lithium battery, the smaller the difference in size between the active material layer of the negative electrode sheet and the active material layer of the positive electrode sheet, the better. However, while maintaining the edge of the active material layer of the negative electrode sheet beyond the edge of the active material layer of the positive electrode sheet, the g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/13H01M10/0525H01M10/0587
CPCH01M4/13H01M10/0525H01M10/0587Y02E60/10Y02P70/50
Inventor 肖良针曾巧
Owner NINGDE AMPEREX TECH
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