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Buffering and heat-insulating composite layer, preparation method thereof, battery and power utilization device

A technology of electrical devices and composite layers, which is applied in secondary batteries, battery pack components, circuits, etc., can solve problems such as powder dropping, heat insulation performance and poor mechanical properties, so as to avoid pollution and damage, and prevent heat loss. Spread effect

Pending Publication Date: 2022-07-08
GAC AION NEW ENERGY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiment of the present application is to provide a buffer heat insulation composite layer and its preparation method, a battery and an electrical device, which can improve the poor heat insulation and mechanical properties of existing airgel heat insulation materials, as well as the loss of heat during use. powder problem

Method used

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  • Buffering and heat-insulating composite layer, preparation method thereof, battery and power utilization device
  • Buffering and heat-insulating composite layer, preparation method thereof, battery and power utilization device
  • Buffering and heat-insulating composite layer, preparation method thereof, battery and power utilization device

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Embodiment 1

[0038] see figure 1 , the embodiment of the present application provides a battery 10 , wherein the battery 10 includes a box body 100 and a battery module 200 , and the battery module 200 is accommodated in the box body 100 . The box body 100 is used to provide an accommodation space for the battery module 200 , and the box body 100 may adopt various shapes, such as a cylinder, a rectangular parallelepiped, and the like.

[0039] see figure 1 as well as figure 2 , the battery module 200 provided by the embodiment of the present application includes: a plurality of single cells 210 and a buffer and heat insulation composite layer 220, wherein the plurality of single cells 210 are stacked in sequence along the arrangement direction; the buffer heat insulation composite layer 220 is arranged adjacent to between the two single cells 210.

[0040] The buffer and thermal insulation composite layer 220 includes at least one aerogel layer 221 and multiple layers of geopolymer lay...

Embodiment 2

[0074] The fly ash was pretreated in a planetary ball mill, and ball milled for 20 min at 350 rpm to obtain a powder with a D99 of 60 mm for use, and the alkali activator was water glass (Na 2 O nH 2 O) and NaOH as alkali activators, the water glass modulus was adjusted to 1.5 by adding NaOH and water, and the water-to-binder ratio was 0.3.

[0075] Put water glass, aluminum silicate fiber, and fly ash powder into a container in a mass ratio of 1:2:7, and use a revolution and auto-rotating mixer to disperse. 2 min to obtain the slurry; the slurry was uniformly scraped onto the surface of the aluminum silicate fiber reinforced silica aerogel with a thickness of 2 mm, and the thickness of the slurry on both sides was controlled at 1 mm. After being placed at room temperature (25 ° C) for 4 days, A buffer thermal insulation composite layer is obtained.

Embodiment 3

[0077] The fly ash was pretreated in a planetary ball mill, and ball milled for 20 min at 350 rpm to obtain a powder with a D99 of 60 mm for use, and the alkali activator was water glass (Na 2 O nH 2 O) and NaOH as alkali activators, the water glass modulus was adjusted to 1.5 by adding NaOH and water, and the water-to-binder ratio was 0.3.

[0078] The water glass and the fly ash powder are put into a container in a mass ratio of 1:9, and dispersed by a revolution and rotation mixer. The dispersion conditions are as follows: 1600 rpm revolution, 600 rpm, and 10 minutes of dispersion, and then deaerated for 2 minutes to obtain a composite slurry; The slurry was uniformly scraped onto the surface of the aluminum silicate fiber reinforced silica aerogel with a thickness of 2 mm, and the thickness of the slurry on both sides was controlled at 1 mm. After being placed at room temperature (25 ° C) for 4 days, the buffer insulation was obtained composite layer.

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Abstract

The invention provides a buffering and heat-insulating composite layer, a preparation method thereof, a battery and a power utilization device, and relates to the field of batteries. The buffering and heat-insulating composite layer comprises at least one aerogel layer and multiple geopolymer layers, the geopolymer layers and the aerogel layers are sequentially and alternately stacked, and the first layer and the last layer are the geopolymer layers. The problem that an existing aerogel heat insulation material is poor in heat insulation performance and mechanical performance can be solved through structural change, and meanwhile powder falling during use is avoided.

Description

technical field [0001] The present application relates to the field of batteries, and in particular, to a buffering and thermal insulation composite layer and a preparation method thereof, a battery and an electrical device. Background technique [0002] At present, more and more battery modules and whole package designs use aerogel materials to act as a thermal insulation and fireproof buffer between single cells, showing a good effect of inhibiting the spread of thermal runaway of batteries. However, with the further improvement of the energy density of the single battery, especially the application of the single battery of the high nickel content nickel cobalt lithium manganate positive electrode (hereinafter referred to as the high nickel ternary positive electrode) system, the maximum temperature of the single battery after thermal runaway can reach 1000 Above ℃, higher requirements are put forward for the thermal insulation and mechanical properties of aerogel thermal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/658H01M50/293H01M50/249H01M50/242B32B9/00B32B9/04
CPCH01M10/658H01M50/293H01M50/249H01M50/242B32B5/18B32B5/32B32B2262/10B32B2266/126B32B2266/12B32B2266/057B32B2262/101B32B2262/106B32B2262/0261B32B2262/0276B32B2262/0253B32B2262/0269B32B2266/04B32B2250/42B32B2307/304B32B2307/56Y02E60/10
Inventor 李进顾晓瑜刘超
Owner GAC AION NEW ENERGY AUTOMOBILE CO LTD
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