Safety leakproof battery pack

A leak-proof battery pack and safe technology, applied in battery pack components, secondary batteries, and isolation of batteries from their environment, etc., can solve the problems of electrolyte lithium-ion battery pack promotion, increased battery pack contact with air, and high heat. , to achieve excellent arc extinguishing performance, increase safety factor, and improve safety performance.

Inactive Publication Date: 2014-12-24
MICROVAST POWER SYST CO LTD
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  • Abstract
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Problems solved by technology

[0002] Due to the high energy density and high cycle life characteristics of lithium-ion battery packs, it is widely used in the fields of electric tools and electric vehicles; but at the same time, it brings problems such as high heat during charging and discharging, and easy fire after leakage, especially for electrolytic batteries. The flammable properties of the liquid have seriously hindered the promotion of lithium-ion battery packs, and the existing safety design cannot fully meet the market's demand for the safety performance of lithium-ion battery packs.
[0003] At present, lithium-ion battery packs on the market are usually composed of an open battery case and several battery cells. Too high will cause the battery cell to expand and damage the shell and leak, but it will increase the chance of the battery pack being in contact with the air. Once the lithium-ion battery pack leaks, the flammable active material in the battery will react immediately , causing violent combustion, and more seriously, an explosion

Method used

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] The safety leak-proof battery pack disclosed by the present invention is composed of several battery cells 1 and a sealed battery box 2 for containing the battery cells. A certain amount of insulating and flame-retardant liquid 3 is filled in the battery box 2, so that the battery cells 1 It can be soaked in the insulating flame retardant liquid 3, and then fill the battery box with inert gas, so that the inside of the battery box is in a positive pressure state relative to the outside.

[0026] Comply with the insulating flame retardant fluid flash point ≥ 135 ℃, freezing point ≤ -45 ℃, volume resistivity ≥ 1.0×10 4 All ohm-centimeter liquids can be used in the technical solution provided by the present invention. In this embodiment, silicone oil is used as the insulating flame retardant liquid, and sulfur hexafluoride is used as the inert gas; Sulfur hexafluo...

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Abstract

The invention discloses a safety leakproof battery pack which comprises a plurality of battery monomers and a sealed battery box accommodating the battery monomers; the battery box is internally provided with an insulating flame retardant liquid, and the battery monomers are immersed in the insulating fire retardant liquid; an inert gas is arranged in the battery box, so that the interior of the battery box is in a positive pressure state.

Description

technical field [0001] The invention relates to a lithium ion battery pack, in particular to a lithium ion battery pack with high safety level. Background technique [0002] Due to the high energy density and high cycle life characteristics of lithium-ion battery packs, it is widely used in the fields of electric tools and electric vehicles; but at the same time, it brings problems such as high heat during charging and discharging, and easy fire after leakage, especially for electrolytic batteries. The flammability of the liquid makes the promotion of lithium-ion battery packs seriously hindered, and the existing safety design cannot fully meet the market's demand for the safety performance of lithium-ion battery packs. [0003] At present, lithium-ion battery packs on the market are usually composed of an open battery case and several battery cells. Too high will cause the battery cell to expand and damage the shell and leak, but it will increase the chance of the battery ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/10H01M10/613H01M10/653H01M10/48
CPCH01M10/488H01M50/24Y02E60/10
Inventor 杨从明仝志明
Owner MICROVAST POWER SYST CO LTD
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