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Intumescent battery pad

An inflatable and inflatable technology, applied in the field of battery assemblies, can solve the problems of increased risk of flame occurrence and propagation

Pending Publication Date: 2020-12-11
ROGERS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

An ongoing concern with large cells is safety, since the energy released into a thermally runaway cell is proportional to the amount of electrolyte and active material that remains inside the cell and becomes available during thermal runaway
These methods can place an upper bound on the energy density that can be achieved
[0004] As the need for batteries with high energy density increases, the risk of flame initiation and propagation increases

Method used

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Examples

Experimental program
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Embodiment 1

[0060] Seven PORON brand polyurethane foams were cut into strips with a thickness of 3mm. The intumescent coating was applied to the broad surfaces of three of the polyurethane foams, and three of the polyurethane foams were dipped into the intumescent coating. The seventh polyurethane foam does not include intumescent coatings.

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Abstract

The invention relates to an intumescent battery pad. In an aspect, the intumescent battery pad for a lithium ion battery comprises a polyurethane foam having a compression force deflection of 5 to 1,035 kilopascals at 25% deflection determined in accordance with ASTM D3574-17; and an intumescent material comprising an acid source, a carbon source, and a blowing agent; wherein the intumescent battery pad has a UL-V0 rating at a thickness of 1 millimeter. In another aspect, a battery can comprise at least two battery cells; and an intumescent battery pad located in between the at least two battery cells.

Description

technical field [0001] The present application relates to a battery assembly, and in particular to a battery assembly including an intumescent battery mat that may be used with a lithium ion battery. Background technique [0002] The demand for electrochemical energy storage devices such as lithium-ion batteries is increasing due to the growth of applications such as electric vehicles and grid energy storage systems and other multi-cell battery applications such as electric bicycles, uninterruptible power supply battery systems and lead-acid replacement batteries. increase. For large applications such as grid storage and electric vehicles, multiple cells connected in series-parallel arrays are often used. Such units may be large (eg, at least 10 ampere-hours (Ah)). An ongoing issue with large cells is safety, since the energy released into a thermally runaway cell is proportional to the amount of electrolyte and active material that remains inside the cell and is available...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/10H01M10/0525H01M10/653H01M50/209H01M50/293H01M50/489
CPCH01M10/0525H01M10/653H01M50/489H01M50/209H01M50/293H01M10/6235H01M10/658H01M10/659H01M10/052H01M50/24Y02E60/10H01M50/116H01M50/411
Inventor 王巍布雷特·基尔赫尼罗伯特·戴格尔马克·圣·让克里斯托弗·丘尔奇尔
Owner ROGERS CORP