Battery cell and electric device

A battery cell and electrode assembly technology, applied in the direction of circuit, electrode manufacturing, electrical components, etc., can solve problems such as damage to welding parts, failure of tabs, etc.

Active Publication Date: 2021-04-20
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The inventors of the present invention found in the process of realizing the present invention that: at present, the tabs are fixed to the pole piece by welding processes such as laser welding and ultrasonic welding, and when the user accidentally drops

Method used

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  • Battery cell and electric device
  • Battery cell and electric device
  • Battery cell and electric device

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Embodiment Construction

[0041] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is expressed as being “fixed on” / “fixed on” / “installed on” another element, it may be directly on the other element, or there may be one or more intervening elements therebetween. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The terms "vertical", "horizontal", "left", "right", "inner", "outer" and similar expressions are used in this specification for the purpose of description only.

[0042] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. Terms ...

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Abstract

The embodiment of the invention relates to the technical field of batteries, and discloses a battery cell and an electric device. The battery cell comprises an electrode assembly and a shell for accommodating the electrode assembly; the electrode assembly comprises a first pole piece and a second pole piece. The first pole piece comprises a current collector, a connecting piece and a tab. The current collector comprises a plurality of flat parts which are arranged in a stacked mode. The fixed end of the connecting piece is connected to the flat parts, the free end of the connecting piece faces the flat parts and is close to or attached to the flat parts, and the free end can be elastically bent relative to the current collector. The first end of the tab is fixed to the connecting piece, and the second end of the tab exceeds the flat parts. On one hand, the connecting piece has a certain elastic moving space and can transfer impact on the tab, and on the other hand, part of impact force can be removed in the process that the connecting piece is elastically bent to absorb energy, so that the risk that the tab loses efficacy when falling off can be reduced by the battery cell.

Description

【Technical field】 [0001] Embodiments of the present invention relate to the technical field of batteries, and in particular, to a battery cell and an electrical device. 【Background technique】 [0002] A battery cell is a device that converts external energy into electrical energy and stores it inside, so as to supply power to external electrical devices (such as portable electronic devices) when needed. At present, batteries are widely used in electrical devices such as mobile phones, tablets, and notebook computers. [0003] Generally, a battery cell includes a case assembly and an electrode assembly disposed in the case assembly. The electrode assembly generally includes a positive electrode sheet, a negative electrode sheet arranged alternately in a cycle, and a separator arranged between the two and used to separate the two. Wherein, the pole piece (positive pole piece or negative pole piece) includes a current collector, a tab with one end welded to the current collec...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01M50/531
CPCY02E60/10
Inventor 孟春雷
Owner NINGDE AMPEREX TECH
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