Lithium cell safety valve

A technology for safety valves and lithium batteries, which is applied to battery components, circuits, electrical components, etc., can solve problems such as battery leakage, and achieve the effects of reducing damage, improving reliability, and enhancing overall rigidity

Inactive Publication Date: 2010-12-29
常州剑湖金城车辆设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the above-mentioned technical problems existing in the existing lithium battery safety v

Method used

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  • Lithium cell safety valve
  • Lithium cell safety valve
  • Lithium cell safety valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] See Figure 1 to Figure 3 , The lithium battery safety valve of this embodiment includes a sealing ring 1, a top cover 2, a PTC ring 3, an explosion-proof diaphragm 4, an orifice plate 5, an insulating layer 6 and a connection point 7.

[0027] The top cover 2, the PTC ring 3, the explosion-proof diaphragm 4 and the orifice plate 5 are sequentially arranged inside the sealing ring from top to bottom. The orifice plate 5 and the explosion-proof diaphragm 4 are connected by ultrasonic welding, or by conductive glue, or by stamping, or by laser welding or resistance welding. The horizontal buckle end 4-2 of the explosion-proof diaphragm 4 is buckled to the top of the periphery 2-1 of the top cover 2, and the vertical buckle end 4-1 and the horizontal buckle end 4-2 are connected to the periphery 2-1 of the top cover 2. And the outside of the edge of the PTC ring 3 forms a hemming. The outside of the periphery 2-1 of the top cover 2 is aligned with the outer edge of the P...

Embodiment 2

[0030] See Figure 4 , The rest of this embodiment is the same as that of Embodiment 1, except that the sealing ring 1 and the insulating pad 1-1 are connected by three connecting ribs 8 .

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Abstract

The invention discloses a lithium cell safety valve which comprises a sealing ring, a top cover, a PTC (Positive Temperature Coefficient) ring, an anti-explosion membrane and a pore plate, wherein the top cover, the PTC ring, the anti-explosion membrane and the pore plate are sequentially arranged in the sealing ring from top to bottom; a horizontal clip fastening end of the anti-explosion membrane is clipped and fastened above the periphery of the top cover; and the periphery of the top cover is aligned to the outer edge of the PTC ring. The lithium cell safety valve also comprises insulating layers which are arranged at the inner sides of a vertical clip fastening end and the horizontal clip fastening end of the anti-explosion membrane, at the outer side of the edge on the periphery of the top cover and at the outer side of the edge of the PTC ring and clipped and fastened above the periphery of the top cover. In the lithium cell safety valve, the insulating layers are arranged at the outer side of the edge on the periphery of the top cover, at the outer side of the edge of the PTC ring and between the vertical clip fastening end and the horizontal clip fastening end of the anti-explosion membrane, which can prevent the anti-explosion membrane from causing a short circuit on the PTC ring to invalidate the PTC ring and guarantee that the protection function of the PTC ring is not influenced, thus the lithium cell safety valve can be used for solving the problem of cell leakage quality and has the advantages of high rigidity and convenient assembly.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a lithium battery safety valve. Background technique [0002] Lithium batteries, as sealed rechargeable batteries with high energy density, are increasingly used as driving power sources for small portable devices such as notebook computers and mobile phones, and their demand is increasing. When the battery is affected by abnormal factors such as short circuit, high heat, overcharge, etc., high-pressure gas is likely to be generated inside the battery, which will cause deformation of the battery case and even cause the risk of explosion. In order to make it safe to use, a safety valve must be installed in the battery. When the internal pressure of the battery container rises to an abnormal state, this cracked safety valve can quickly open and discharge the gas to provide safety protection under abnormal conditions. effect. Since the PTC (Positive Temperature Coefficie...

Claims

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Application Information

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IPC IPC(8): H01M2/12H01M2/04H01M50/342
CPCY02E60/10
Inventor 韩金升魏军平杨国友
Owner 常州剑湖金城车辆设备有限公司
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