Safety valve structure for lithium battery

A safety valve, lithium battery technology, applied in structural parts, battery pack parts, circuits, etc., can solve the problems of battery failure, complex structure, battery dust, etc., to achieve high installation qualification rate, simple overall structure, and durable. Corrosive effect

Pending Publication Date: 2020-05-22
SUZHOU PHYLION BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of valve body has a complex structure, which is prone to problems such as dust and water ingress in the battery, and may cause battery failure due to spring failure.

Method used

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  • Safety valve structure for lithium battery
  • Safety valve structure for lithium battery
  • Safety valve structure for lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment one: see Figure 1 to Figure 4 As shown, a safety valve structure for a lithium battery is composed of a rubber plug 1 and a pin 2, the rubber plug 1 is made of EPDM rubber, and the pin is a metal pin; as figure 1 and figure 2 As shown, the rubber plug 1 is composed of a plug body 3 matching with the battery blast hole and a head 4 with a diameter larger than the plug body. The center of the rubber plug 1 is provided with a through hole 5 along the direction of the symmetry axis of the plug; the pin 2 consists of a pin The main body 6 and the limit head 7 at the upper end are formed. The diameter of the pin body 6 is larger than the inner diameter of the through hole 5. The pin body 6 is clamped in the through hole 5 and presses the wall of the through hole, so that the periphery of the plug body and the battery are blasted. The hole forms an interference fit; the limit head 7 at the upper end of the pin is limited by the head 4 of the rubber plug and is lo...

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Abstract

The invention discloses a safety valve structure for lithium battery. The safety valve structure is characterized in that the safety valve structure is composed of a rubber plug and a dowel, the rubber plug is composed of a plug body part matched with a battery blast hole and a head part with the diameter larger than that of the plug body part, and a through hole is formed in the center of the rubber plug in the symmetry axis direction of the rubber plug; the dowel is composed of a dowel body and a limiting head at the upper end, the diameter of the dowel body is larger than the inner diameterof the through hole, and the dowel body is clamped in the through hole and presses the wall of the through hole of the plug body, so that the periphery of the plug body is in interference fit with the battery blast hole; and a limiting head at the upper end of the dowel is limited by the head of the rubber plug and located outside the through hole. The safety valve structure is simple in overallstructure, low in precision requirement and convenient to install, online installation can be completed in the battery production process, and protection parts do not need to be additionally arranged.

Description

technical field [0001] The invention relates to a lithium battery structure, in particular to a safety structure of the lithium battery, in particular to a safety valve structure for a hard shell lithium battery. Background technique [0002] Lithium-ion batteries are widely used because of their light weight, small size, large capacity, and fast charging speed. During the normal charging and discharging process of the battery, a small amount of gas will be generated during the internal activation of the battery. As the temperature of the battery rises, the internal pressure will increase. Once the internal pressure exceeds the compressive strength of the shell, it may cause an explosion. Therefore, in order to avoid potential safety hazards, a safety valve is provided on the casing of the lithium-ion battery (usually on the end cap), which is opened to release the pressure when the air pressure exceeds a predetermined threshold. [0003] The currently commonly used safety ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/12H01M50/317
CPCH01M50/317Y02E60/10
Inventor 吴俊华王正伟
Owner SUZHOU PHYLION BATTERY
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