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Lithium ion battery and case thereof

A technology of lithium-ion batteries and lithium batteries, which is applied in the direction of battery boxes/jackets, secondary batteries, battery pack components, etc., can solve problems such as easy damage of punches and difficulties in mold design, and achieve safety hazard avoidance and thickness control Easy, Consistent Results

Pending Publication Date: 2018-09-21
无锡凯帕德瑞科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Punches are prone to damage, especially when stamping housings made of stainless steel
In addition, mold design is also difficult

Method used

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  • Lithium ion battery and case thereof
  • Lithium ion battery and case thereof
  • Lithium ion battery and case thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0025] as attached Figure 2~Figure 5 As shown, the present embodiment takes the two-section arc-shaped safety valve 3 as an example. A lithium ion battery includes a casing 7, an upper cover above the casing 7, and a winding core 6 inside the casing 5. The positive pole of the winding core 6 is connected to the pole 8 located in the center of the upper cover for leading out the positive pole of the lithium battery through a foil guide. The shell 7 includes a cylindrical shell 1 and a shell bottom 2 at the bottom of the cylindrical shell 1. The negative pole of the winding core 6 is connected to the central boss 5 located at the center of the case bottom 2 for leading out the negative pole of the lithium battery through a foil guide, and two mutually symmetrical arc-shaped safety valves 3 are arranged on the base 2; The arc-shaped safety valve 3 is arranged in...

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Abstract

The invention belongs to the technical field of lithium ion batteries, and relates to a lithium ion battery and a case thereof. The lithium ion battery comprises the case, an upper cover and a roll core, wherein the upper cover covers the case; the roller core is positioned inside the case; a positive electrode of the roll core is connected with an electrode post through a guide foil strip; the electrode post is positioned in the center of the upper cover and is used for guiding out the positive electrode of the lithium ion battery; the case comprises a cylindrical case body and a case bottompositioned at the bottom of the cylindrical case body; a negative electrode of the roll core is connected with a center lug boss through a guide foil strip; the center lug boss is positioned in the center of the case bottom and is used for guiding out a negative electrode of the lithium ion battery; one section or a plurality of sections of arc-shaped safety valves are arranged on the base; the arc-shaped safety valve is an arc-shaped groove with the gradually reduced thickness in the circumference direction; the radius of the arc-shaped groove is 1 / 2 to 3 / 4 of the radius of the case bottom. Through the arrangement of the arc-shaped safety valve with the gradually reduced thickness on the case base, product service life reduction caused by occurrence of advanced opening of the safety valvecan be effectively avoided; meanwhile, the potential safety hazards caused when the safety valve is not opened at too high inside air pressure in the lithium ion battery can be avoided.

Description

technical field [0001] The invention relates to a lithium ion battery and its casing, belonging to the technical field of lithium batteries. Background technique [0002] The safety valve of the traditional shell is generally stamped on the bottom of the shell, and the cross groove, Y-shaped groove, and H-shaped groove are engraved linearly, and the width is generally ≤0.2mm. For the negative electrode, the winding core and the bottom of the casing need to be welded by resistance (there is usually a Ø3mm through hole in the middle of the winding core, and the welding pin of resistance welding passes through this through hole, so that the conductive foil strip of the negative electrode of the winding core is welded to the inner bottom of the casing) Generally speaking, safety valves with Y-shaped and H-shaped grooves cannot be applied without air escape. [0003] Such as figure 1 As shown, it is the shell of the cross groove safety valve 9, although the cross groove can be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/0587H01M2/12H01M2/02H01M50/107H01M50/342
CPCH01M10/0525H01M10/0587H01M50/107H01M50/3425Y02E60/10Y02P70/50
Inventor 陈柯吴孟大王海勇
Owner 无锡凯帕德瑞科技有限公司
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