Flame-retardant material as well as preparation method and application thereof

A flame retardant material, alkali metal silicate technology, applied in the field of flame retardant materials, can solve the problems of low temperature resistance, degradation of polymer materials, gas production and combustion, etc., and achieve the effect of preventing the spread of thermal runaway

Pending Publication Date: 2022-07-26
VOLKSWAGEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the problem it faces is its relatively low tolerance temperature (less than 200°C)
Another disadvantage is that because it is a polymer material, when the thermal runaway of the battery cell occurs and reaches a high temperature, the polymer material itself still has the risk of degradation, gas generation and combustion (http: / / www.pinlue.com / article / 2018 / 03 / 1021 / 545736349040.html)

Method used

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  • Flame-retardant material as well as preparation method and application thereof
  • Flame-retardant material as well as preparation method and application thereof
  • Flame-retardant material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Example 1 of the present invention consists of an aqueous alkali metal silicate solution, ZrO 2 , Al 2 O 3 , TiO 2 Powder, and surfactant preparation.

[0080] A. Preparation of raw materials

[0081] 1. Liquid components

[0082] Weigh out the following components and mix well. Based on the liquid component with a total weight of 100g:

[0083] - 20 grams of water;

[0084] - 2 grams of NaOH solution (33% concentration, manufacturer: Sigma-Aldrich);

[0085] - 2 grams of KOH solution (45% concentration, manufacturer: Sigma-Aldrich);

[0086] -75 grams of sodium silicate solution (manufacturer: Sigma-Aldrich; trade name: KENING, model: KN-40A);

[0087] - 1 g of Sodium Dodecylbenzene Sulfonate SDBS (Manufacturer: Sigma-Aldrich)

[0088] The total solids content of the liquid components is 40 wt% based on the total weight of the composition, SiO 2 The content was 25 wt%, the modulus was 2, and the pH was 13; the viscosity of the aqueous solution was 29 mPas. ...

Embodiment 2

[0099] The flame retardant composition of Example 2 was prepared using the same liquid components and preparation method as in Example 1 except that the composition of the solid components was different.

[0100] The solid component of Example 2 consisted of 140 g of molten SiO 2 , 50g of ZrO 2 and 10g of graphite powder (manufacturer: Zhongnuo new material, model: 3N-4N, density 1g / cm 3 ) composition, based on solid components with a total weight of 200 g.

[0101] Using a bulk density tester (manufacturer: Jiahangbo Company; model: HYL-103 natural bulk density meter) to measure the bulk density of solid components based on GB / T 16913.3-1997, the bulk density is 500g / cm 3 .

Embodiment 3-10

[0103]The flame retardant compositions of Examples 3-10 were prepared using the same method as Example 1 except that the composition of the solid components was different. The composition of the solid components is shown in Table 1 for details.

[0104] Among them, MgCO3 powder was added in Example 7, dolomite powder was added in Example 8, CaCO3 powder was added in Example 9, and SiC powder was added in Example 10.

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Abstract

The present invention relates to a flame retardant material comprising: 55-70 wt.% of an alkali metal silicate condensate; 5 to 20 wt.% of a metal oxide comprising ZrO2; and a surfactant wherein the metal oxide partially co-forms a copolymerized network structure with the alkali metal silicate condensate and partially embedded in the copolymerized network structure in the form of particles. The invention also relates to a method for preparing the flame retardant material, comprising the following steps: providing a liquid component comprising an alkali metal silicate aqueous solution; the preparation method comprises the following steps: providing a liquid component containing ZrO2 particles, providing a solid component containing ZrO2 particles, uniformly mixing the liquid component and the solid component to form a viscous slurry, coating the slurry on a carrier or injecting the slurry into a mold, ventilating and heating, dehydrating and condensing the slurry, and curing to obtain the foamable flame-retardant material. The flame-retardant material according to the invention is particularly used for preventing thermal runaway propagation of power batteries.

Description

technical field [0001] The present invention relates to a flame retardant material, a method for preparing the flame retardant material and the application of the flame retardant material. The flame retardant material is particularly useful for preventing the thermal runaway propagation of the power battery and protecting the power battery from being ignited by a high temperature heat source. The present invention also relates to battery modules or CTP battery packs comprising such flame retardant materials. Background technique [0002] Lithium batteries are now more and more widely used in the field of new energy vehicles as a power source. The development trend of lithium-ion battery vehicles is that the long-range and high-power fast charging are combined. In order to improve the cruising range, it is necessary to increase the number of lithium batteries and the energy density of each cell. Due to the pursuit of high energy density in the power battery industry, there ...

Claims

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Application Information

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IPC IPC(8): H01M10/658
CPCH01M10/658
Inventor 李鑫
Owner VOLKSWAGEN AG
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