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Lithium battery thermal runaway fire inhibition capsule and lithium ion battery

A lithium-ion battery, fire suppression technology, applied in batteries, fire rescue, secondary batteries, etc., can solve the problems of general flame retardant effect, flame retardant can not inhibit thermal runaway gas production reaction, etc., to avoid direct contact effect

Active Publication Date: 2019-11-12
ZHEJIANG NARADA POWER SOURCE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this measure has many limitations. First, in order not to affect the performance of lithium-ion batteries, too much flame retardant cannot be added, and the flame retardant effect is average; second, flame retardants cannot inhibit thermal runaway gas production reactions.

Method used

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  • Lithium battery thermal runaway fire inhibition capsule and lithium ion battery
  • Lithium battery thermal runaway fire inhibition capsule and lithium ion battery
  • Lithium battery thermal runaway fire inhibition capsule and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Please refer to figure 1 and figure 2 . Embodiment 1 of the present invention provides a lithium electric thermal runaway fire suppression capsule 001. The lithium electric thermal runaway fire suppression capsule 001 includes: a capsule container 002 that produces a breach in the range of 70°C to 100°C and a heat sink inside the capsule container 002. Runaway Fire Composite Inhibitor 003.

[0029] The lithium electric thermal runaway fire suppression capsule 001 wraps the thermal runaway composite fire inhibitor 003 with a capsule container 002 to avoid direct contact between the thermal runaway composite fire inhibitor 003 and the outside world and prevent the thermal runaway composite fire inhibitor 003 from conducting electricity to the electrolyte and the like sexual influence. When a fire occurs, when the ambient temperature of the capsule container 002 reaches 70°C to 100°C, it will rupture, thereby releasing the internal thermal runaway fire compound inhibit...

Embodiment 2

[0039] Please refer to figure 1 and image 3 . The structure and shape of the lithium electric thermal runaway fire suppression capsule in Example 2 and the lithium electric thermal runaway fire suppression capsule in Example 1 are the same, and the same structure uses the same label, which will not be repeated here, and only the differences will be given below. illustrate.

[0040] The lithium-ion battery includes an electrode group and positive and negative poles (positive pole 015 and negative pole 014), without a support, and a lithium electric thermal runaway fire suppression capsule is arranged between the positive and negative poles. The pole group 012 includes positive and negative plates and a diaphragm. When the fire extinguishing agent coming out of the breach absorbs heat and vaporizes, the fire extinguishing agent stretches the diaphragm and the positive and negative plates, increasing the distance between the electrolyte on the diaphragm and the active materia...

Embodiment 3

[0041] Embodiment 3 and Embodiment 4 both provide a soft pack lithium ion battery. And the capsule containers in the third to fourth examples are the aluminum-plastic film for encapsulating the soft-pack battery, which integrates the thermal runaway fire suppression capsule of the lithium battery and the soft-pack battery.

[0042] Embodiment three

[0043] Please refer to Figure 4 . Embodiment 3 provides a soft pack lithium ion battery. Lithium electric thermal runaway fire suppression capsules are arranged on the side of the pole group. The sealing width of the soft-pack lithium-ion battery is set to 3-10 mm, the width of the inner edge sealing 039 of the suppression capsule is set to 0.5-5 mm, and the outer edge sealing 040 is set to 3-10 mm. The strength of the inner edge 039 is weakened by setting the width of the inner edge 039 to be 1-3mm narrower than the other edges (top outer edge 034, left outer edge 033 and outer edge 040). When the battery is thermally runaw...

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Abstract

The invention provides a lithium battery thermal runaway fire inhibition capsule and a lithium ion battery. The lithium battery thermal runaway fire inhibition capsule comprises a capsule container and a thermal runaway fire compound inhibitor, wherein the capsule container can generate an opening in the temperature range of 60 DEG C-200 DEG C, and the thermal runaway fire compound inhibitor is arranged in the capsule container. The lithium ion battery comprises a shell and the lithium battery runaway fire inhibition capsule, wherein the lithium battery thermal runaway fire inhibition capsuleis arranged in the shell.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a lithium electric thermal runaway fire suppression capsule and a lithium ion battery. Background technique [0002] With the widespread application of lithium-ion batteries in the fields of electric bicycles, energy storage, and electric vehicles, related fires and explosions occur frequently, posing a serious threat to the safety of users' lives and property. [0003] Lithium-ion battery is a closed system containing high-energy materials, flammable substances and flame retardants. Lithium-ion batteries only exchange energy with the outside world, and there is no exchange of matter. The combustibles of lithium-ion battery fire mainly include electrolyte and combustible gas generated by thermal runaway reaction, and thermal runaway reaction of lithium-ion battery can continuously generate combustible gas, oxygen and heat. When a thermal runaway fire occurs in a l...

Claims

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Application Information

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IPC IPC(8): A62C3/16H01M10/0525A62D1/00
CPCA62C3/16A62D1/0021H01M10/0525H01M2200/10Y02E60/10
Inventor 王羽平刘桃松王瑜相佳媛陈建
Owner ZHEJIANG NARADA POWER SOURCE CO LTD
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