Steel shell lithium battery

A lithium battery and steel case technology, applied in the field of steel case batteries, can solve problems such as short circuit, battery overheating, negative electrode lugs contacting positive electrodes or positive and negative electrodes

Active Publication Date: 2012-10-03
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bending of the negative tab will cause the cell to be squeezed, so there is a risk that the negative tab will contact the positive or the positive and negative contacts, resulting in the danger of overheating, short circuit, or even fire inside the cell.

Method used

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  • Steel shell lithium battery
  • Steel shell lithium battery
  • Steel shell lithium battery

Examples

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Embodiment Construction

[0026] The present invention will be described in further detail below in conjunction with specific embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0027] Such as figure 1 and figure 2 As shown, a steel case lithium battery includes a battery cell 1, a steel case 2 accommodating the battery cell 1 and a cap 3 connected to the steel case 2, and the battery cell 1 is provided with a positive electrode tab 11 And the negative pole tab 12, the negative pole tab 12 is connected to the bottom of the battery cell 1, an insulating gasket 4 is provided between the bottom of the battery core 1 and the steel shell 2, and the insulating gasket 4 is close to the steel shell The wall 21 is provided with a gap corresponding to the position where the negative pole tab 12 protrudes.

[0028] Wherein, the shape of the insulating spacer 4 is circular, and the shape of the gap is a rectangular groove ( image 3 ), arc-shaped groov...

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PUM

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Abstract

The invention belongs to the technical field of a lithium battery and particularly relates to a steel shell lithium battery. The steel shell lithium battery comprises an electric core, a steel shell for containing the electric core and a cover cap connected to the steel shell, wherein the electric core is provided with an anode lug and a cathode lug; the cathode lug is connected with the bottom of the electric core; an insulating gasket is arranged between the bottom of the electric core and the steel shell; and a notch is arranged at the position of the insulating gasket, which is close to the steel shell wall and stretches out correspondingly to the cathode lug. Compared with the prior art, according to the steel shell lithium battery disclosed by the invention, the insulating gasket with the notch is adopted and the cathode lug is bent into an arc shape when being led out from the notch, so that a large gap is formed between the cathode lug and the bottom of the steel shell. In subsequent procedures of slot rolling, liquid injection, opening sealing and the like, the electric core is moved downwards correspondingly to the steel shell so that the lugs are stressed; and a space for releasing a lug pressure exists so that the lug deformation does not happen. The transformation ratio of the cathode lug in the steel shell lithium battery is close to 0.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and in particular relates to a steel shell battery capable of improving the bending condition of anode lugs. Background technique [0002] As a kind of clean energy, lithium batteries have been widely used in various electronic products, such as smartphones and notebooks, due to their high voltage, long charge and discharge life, low environmental pollution and low self-discharge rate Computers, digital cameras and portable small appliances, etc. [0003] Among them, steel-cased batteries have received greater attention because their casings are made of steel and have greater hardness, which can be applied to some equipment that may be collided. [0004] A traditional steel case generally includes a battery cell, a steel case encapsulating the battery cell (referred to as a steel case) and a cap connected to the steel case. There are positive pole lugs and negative pole lugs on the ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/18
CPCY02E60/12Y02E60/10
Inventor 许玉江
Owner NINGDE AMPEREX TECH
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