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Thermal insulation cotton and preparation method thereof, and battery module using thermal insulation cotton

A technology of thermal insulation cotton and thermal insulation material, which is applied in battery pack parts, secondary batteries, and secondary battery repair/maintenance, etc. Preparation method and other problems, to achieve the effect of great practical value, prevent fire and improve safety performance

Inactive Publication Date: 2018-05-01
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, at least the following problems still exist in related technologies: firstly, the above-mentioned method cannot reduce the heat exchange between the single cells inside the module, and once a certain battery or a certain part of the batteries has thermal runaway, it cannot be controlled; secondly, the above-mentioned battery modules The fine structure of the group and the cumbersome preparation method not only increase the cost but also reduce the energy density

Method used

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  • Thermal insulation cotton and preparation method thereof, and battery module using thermal insulation cotton
  • Thermal insulation cotton and preparation method thereof, and battery module using thermal insulation cotton
  • Thermal insulation cotton and preparation method thereof, and battery module using thermal insulation cotton

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The following steps are used to prepare thermal insulation cotton 1:

[0028] Add 250g of zirconia (particle size D50 is 0.9μm), 250g of melamine cyanurate (D50 is 1.7μm) and 10g of SBR emulsion into 125g of water and stir for 60min, pour the resulting slurry into a paper sample machine for dilution and molding . Cover the forming paper with a felt cloth, then gently roll it with a cylinder, stick the paper sheet to the felt cloth, then put the felt cloth and wet paper sheet into a vacuum dryer and vacuum dry for 50-60 seconds, take it out and peel off the felt cloth , place the incompletely dried paper sheets in an electric constant temperature blast drying oven for drying, wherein the temperature is set at 105°C, and dry for 100-120 minutes until completely dry. The resulting material is thermal insulation cotton 1 (such as figure 2 Shown), its thickness is 1mm, then cut into 160mm long, 120mm wide sheets for future use.

[0029] The battery module was prepared by...

Embodiment 2

[0036] The zirconia in Example 1 is replaced by alumina (D50 is 0.7 μm), and the rest are the same as in Example 1.

Embodiment 3

[0038] The melamine cyanurate in Example 1 was replaced by aluminum hydroxide (D50 being 3.2 μm), and the rest were the same as in Example 1.

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Abstract

The invention discloses a thermal insulation cotton and a preparation method thereof, and a battery module using the thermal insulation cotton, wherein the thermal insulation cotton contains a thermalinsulation material and a fire-retardant material, and can be placed between single cells in a battery module. The preparation method of the thermal insulation cotton comprises: mixing a thermal insulation material and a fire-retardant material, adding the obtained mixture to a solvent, adding a proper amount of a binder, stirring to obtain a mixed slurry, and carrying out pressing molding on theslurry to obtain the thermal insulation cotton. Compared to the thermal insulation cotton in the prior art, the thermal insulation cotton of the present invention contains the thermal insulation material and the fire-retardant material so as to simultaneously provide effects of effective thermal insulation and flame retardancy. According to the present invention, the preparation method has advantages of simple steps, low cost and easy mass production; and the thermal insulation cotton can be used in battery modules, can effectively inhibit the spread of the thermal runaway of the battery, canprevent the battery module from catching fire and explosion, and can remarkably improve the safety performance of the battery module.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries. More specifically, the invention relates to a heat insulation cotton, a preparation method thereof and a battery module using the heat insulation cotton. Background technique [0002] In the traditional lithium-ion battery module, the single cells are closely connected, the heat is difficult to conduct and dissipate, the heat dissipation performance is poor, the thermal runaway is very destructive, and there is a large safety risk. When there is a problem with one or a certain part of the single battery, the heat generated during thermal runaway is enough to cause the surrounding batteries to go out of control one after another. This rapid spread of characteristics forms the short board effect of traditional lithium-ion battery modules. [0003] In recent years, many improvements have been made to improve the safety performance of battery modules. For example, in the related art, someone use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/34H01M10/42H01M50/581
CPCH01M10/4207H01M50/581Y02E60/10
Inventor 刘阳李强闫传苗艾邓均宋晋阳
Owner CONTEMPORARY AMPEREX TECH CO
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