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A cylindrical lithium-ion battery with a secondary sealing valve

A lithium-ion battery, secondary sealing technology, applied in secondary batteries, battery pack components, circuits, etc., can solve the problem of spontaneous combustion of lithium-ion batteries

Inactive Publication Date: 2020-09-29
周虎
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lithium-ion battery with the explosion-proof valve opened is no longer sealed, and the moisture in the air enters the lithium-ion battery and reacts with the negative electrode of the lithium-ion battery, which may cause the lithium-ion battery to spontaneously ignite

Method used

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  • A cylindrical lithium-ion battery with a secondary sealing valve
  • A cylindrical lithium-ion battery with a secondary sealing valve
  • A cylindrical lithium-ion battery with a secondary sealing valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The cylindrical lithium-ion battery of the present invention is composed of a positive electrode, a negative electrode, a diaphragm, an electrolyte, a casing and a cap, the casing and the cap form a sealed space, the positive and negative electrodes are separated by a diaphragm and wound into shape, the positive electrode, the negative electrode, the diaphragm, the electrolyte All are in the sealed space constructed by the shell and the cap. The cap is a three-component composite cap, which is mainly composed of an upper cap, a lower cap and a rubber ball explosion-proof valve with metal coating, and has a secondary sealing function. There is a pressure relief hole 5 in the center of the lower cap 2, and a plurality of ventilation holes 4 are distributed on the off-center position of the upper cap 1. The rubber ball explosion-proof valve 3 with a metal coating is an elastic rubber ball with an aluminum coating. The upper cap is a steel stamping part, the lower cap is an...

Embodiment 2

[0014] The cylindrical lithium-ion battery of the present invention is composed of a positive electrode, a negative electrode, a diaphragm, an electrolyte, a casing and a cap, the casing and the cap form a sealed space, the positive and negative electrodes are separated by a diaphragm and wound into shape, the positive electrode, the negative electrode, the diaphragm, the electrolyte All are in the sealed space constructed by the shell and the cap. The cap is a three-component composite cap, which is mainly composed of an upper cap, a lower cap and a cover-type metal shrapnel explosion-proof valve, which has a secondary sealing function. The center of the lower cap 2 has a pressure relief hole 5, and the off-center position of the upper cap 1 distributes a plurality of ventilation holes 4, and the cover type metal shrapnel explosion-proof valve 3 is a nickel-plated spring steel sheet of the pot cover type. The upper cap is a steel stamping part, the lower cap is an aluminum st...

Embodiment 3

[0016] The cylindrical lithium-ion battery of the present invention is composed of a positive electrode, a negative electrode, a diaphragm, an electrolyte, a casing and a cap, the casing and the cap form a sealed space, the positive and negative electrodes are separated by a diaphragm and wound into shape, the positive electrode, the negative electrode, the diaphragm, the electrolyte All are in the sealed space constructed by the shell and the cap. The cap is a three-component composite cap, which is mainly composed of an upper cap, a lower cap and a plug-type metal shrapnel explosion-proof valve, which has a secondary sealing function. There is a pressure relief hole 5 in the center of the lower cap 2, and a plurality of ventilation holes 4 are distributed on the off-center position of the upper cap 1. The plug-type metal shrapnel explosion-proof valve 3 is a nickel-plated spring steel sheet with two steps. The upper cap is a steel stamping part, the lower cap is an aluminum ...

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PUM

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Abstract

The cylindrical lithium ion battery of the present invention is composed of a positive electrode, a negative electrode, a diaphragm, an electrolyte, a casing and a cap, the casing and the cap form a sealed space, the positive and negative electrodes are separated by a diaphragm and wound into shape, the positive electrode, the negative electrode, the diaphragm, the electrolyte All are in the sealed space constructed by the shell and the cap. The cap is a composite cap, mainly composed of an upper cap, a lower cap and an explosion-proof valve, and the explosion-proof valve has a secondary sealing function.

Description

technical field [0001] The invention relates to a lithium ion battery, in particular to a cylindrical lithium ion battery. Background technique [0002] Lithium-ion batteries are characterized by high monomer voltage, high specific energy, high specific power, and long service life. The disadvantages of lithium-ion batteries are high cost and flammable and explosive properties. Cylindrical lithium-ion batteries are characterized by a high degree of standardization and a high degree of production automation. In order to prevent the lithium-ion battery from exploding, an explosion-proof valve is generally arranged on the casing of the lithium-ion battery, and the explosion-proof valve of the cylindrical lithium-ion battery is generally arranged in the cap of the battery. Lithium-ion batteries generally do not produce gas during normal use, so once high-pressure gas is generated inside the lithium-ion battery, it means that the lithium-ion battery has been damaged and cannot ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/12H01M10/0525H01M50/317
CPCH01M10/0525H01M50/325Y02E60/10
Inventor 周虎周思齐
Owner 周虎