Safe and anti-explosion cover plate for power lithium battery

A technology of lithium battery and explosion-proof cover, which is applied in the direction of battery cover/end cover, secondary battery, battery pack components, etc., which can solve the problems of increasing the risk of battery thermal runaway, rising battery temperature, and oxidation of negative pole pieces. Avoid the risk of spontaneous combustion, prevent air oxidation, and have good sealing effects

Pending Publication Date: 2017-07-21
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the explosion-proof membrane is broken, the inside of the battery is connected to the outside world, and oxygen and moisture in the air can easily ent

Method used

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  • Safe and anti-explosion cover plate for power lithium battery
  • Safe and anti-explosion cover plate for power lithium battery
  • Safe and anti-explosion cover plate for power lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The present invention will be further described below in conjunction with accompanying drawing:

[0021] Such as Figure 1-Figure 3 A power lithium battery safety explosion-proof cover plate is shown, including a cover plate substrate 1 with an explosion-proof hole, an explosion-proof valve 4 installed in the explosion-proof hole, and a positive pole column 2 and a negative electrode installed on the cover plate substrate 1 in sequence. Pole 5. The explosion-proof valve 4 is welded on the explosion-proof hole on the cover substrate 1 by laser welding.

[0022] Further, a liquid injection port is opened on the cover substrate 1 , and a liquid injection port sealing piece 7 made of aluminum alloy stamping is arranged above the liquid injection port. The liquid injection port sealing piece 7 is welded on the cover substrate 1 by laser welding.

[0023] Further, the positive pole 2 and the negative pole 5 are installed on the cover substrate 1 through the rivet 3 for fix...

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PUM

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Abstract

The invention relates to a safe and anti-explosion cover plate for a power lithium battery. The safe and anti-explosion cover plate for the power lithium battery comprises a cover plate base plate with an anti-explosion hole, an anti-explosion valve running through the anti-explosion hole as well as a positive pole column and a negative pole column which are arranged on the cover plate base plate sequentially; the anti-explosion valve comprises a hollow anti-explosion main body, a valve cover sheet arranged at the opening position of the upper end of the anti-explosion valve main body, an anti-explosion film sheet arranged at the opening position of the lower end of the anti-explosion valve main body, a sealing sheet arranged at the middle section in the anti-explosion valve main body as well as a spring connected between the valve cover sheet and the sealing sheet; and a through hole is formed in the valve cover sheet. The safe and anti-explosion cover plate for the power lithium battery can guarantee the sealing property of the battery, also can reduce the use risk of the low lithium battery, and has the characteristics of reasonable structure, high safety, high sealing property, simplicity in manufacturing and the like.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a safety explosion-proof cover plate for power lithium batteries. Background technique [0002] Using an explosion-proof cover on a lithium-ion battery can improve the safety performance of the battery. The explosion-proof cover plate on the existing lithium-ion battery includes a base plate arranged on the top of the lithium-ion battery. The base plate is provided with an explosion-proof hole. Generally, the explosion-proof film is sealed to the explosion-proof hole by welding, and most of the explosion-proof films are made of copper foil. sheet or aluminum sheet. During the use of the lithium-ion battery, when the battery is overcharged or short-circuited, gas will be generated inside the battery, and the battery air pressure will rise. When the air pressure exceeds the set pressure of the explosion-proof membrane, the explosion-proof membrane will rupture, and...

Claims

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Application Information

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IPC IPC(8): H01M2/04H01M2/12H01M10/42H01M10/0525H01M50/147H01M50/317H01M50/325
CPCH01M10/0525H01M10/42H01M50/147H01M50/317H01M50/325Y02E60/10
Inventor 申永宽倪世杰吴自星
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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