A kind of heat insulation film and its preparation method and application

A heat-insulating film and heat-insulating material technology, applied in chemical instruments and methods, electrochemical generators, synthetic resin layered products, etc., can solve problems such as low structural strength and poor heat insulation effect

Active Publication Date: 2022-05-06
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is generally believed that the use of this kind of heat insulation film has poor heat insulation effect and low structural strength.

Method used

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  • A kind of heat insulation film and its preparation method and application
  • A kind of heat insulation film and its preparation method and application
  • A kind of heat insulation film and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment provides a single-layer heat-insulating film, the structure of which is as follows: Figure 1A As shown, the single-layer heat insulating film 1 includes a raised structure 11, the raised structure 11 on the heat insulating film is 10 μm, and the contact area between the raised structure 11 and the adjacent heat insulating film accounts for 30% of the surface area of ​​the heat insulating film; The thickness is 1mm.

[0043] The preparation method of the single-layer thermal insulation film of the present embodiment comprises the following steps:

[0044] (1) Use a ball mill to mix the following raw materials evenly:

[0045] 50% SiO 2 (D50 is 20nm, particle size distribution 5nm-70nm, 6808NM, SSNano), 20% ZrO 2 (D50 is 20nm, particle size distribution 5nm-70nm, 8512QI, SSNano), 10% SiC (D50 is 30μm, distribution is 5-50μm, 357391-250G, Sigma-Aldrich) and 20% glass fiber with a length of 3mm (T -786H, Nippon Electric Glass);

[0046] (2) Place the un...

Embodiment 2

[0050] This embodiment provides a composite thermal insulation material, which includes two single-layer thermal insulation films, and the structure of the composite thermal insulation material is as follows: Figure 1B As shown, the composite heat insulation material includes two layers of single-layer heat insulation film 1, the single-layer heat insulation film 1 has a raised structure 11, the two layers of single-layer heat insulation film are wrapped by plastic sealing film 2, and the single-layer heat insulation film An air layer 12 is formed therebetween.

[0051] The preparation method of the composite thermal insulation film of the present embodiment comprises the following steps:

[0052] (1) Use a ball mill to mix the following raw materials evenly:

[0053] 50% SiO 2 (D50 is 20nm, particle size distribution 5nm-70nm, 6808NM, SSNano), 20% ZrO 2 (D50 is 20nm, particle size distribution 5nm-70nm, 8512QI, SSNano), 10% SiC (D50 is 30μm, distribution is 5-50μm, 357391...

Embodiment 3

[0060] The composite heat insulation material provided in this embodiment includes three single-layer heat insulation films. The structure of composite insulation materials is as follows: Figure 1C As shown, it includes three pieces of single-layer heat insulation film 1, with a raised structure 11 on the single-layer heat insulation film 1, and the three pieces of single-layer heat insulation film are wrapped by plastic sealing film 2, and an air layer is formed between the three pieces of heat insulation film 12.

[0061] The preparation method of the composite thermal insulation film of the present embodiment comprises the following steps:

[0062] (1) Mix the following evenly with a ball mill:

[0063] 50% SiO 2 (D50 is 20nm, particle size distribution 5nm-70nm, 6808NM, SSNano), 20% ZrO 2 (D50 is 20nm, particle size distribution 5nm-70nm, 8512QI, SSNano), 10% SiC (D50 is 30μm, distribution is 5-50μm, 357391-250G, Sigma-Aldrich) and 20% glass fiber with a length of 3mm...

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Abstract

The invention provides a heat-insulating film, a preparation method and application thereof. Specifically, the present invention provides a composite heat insulation film, which includes: more than two stacked single-layer heat insulation films, and an outer film that wraps the stacked single-layer heat insulation films with plastic, wherein, The single-layer heat insulation film is integrally formed by heat insulation material through pressing, and one side of the film is provided with a plurality of raised rough surfaces and / or has a porous structure. The heat insulating film of the present invention is used in a battery module or a battery pack to prevent heat transmission from occurring. When the battery enters thermal runaway, the material has extremely high heat insulation performance, which can block the heat transfer between the battery cells and greatly improve the safety of the battery.

Description

technical field [0001] The present invention relates to a heat insulation film and its preparation method and application, in particular to a heat insulation film used in battery modules or battery packs to prevent heat transmission and its preparation method. Background technique [0002] In the past two decades, lithium-ion batteries have become the most important power source for new energy vehicles. At present, the lithium-ion battery that has been commercialized in the industry has a structure with graphite as the anode and layered LiMO (M=Ni, Co, Mn binary or ternary system) as the cathode, and the energy density of its single cell is greater than 250Wh / kg. The industry is still pursuing higher energy density (>300Wh / kg). [0003] High nickel NCM or NCA batteries have a great advantage in high energy density compared to lithium iron phosphate batteries with relatively low energy density (160-180Wh / kg). However, due to the increase of nickel content, the stabilit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/625H01M10/658H01M10/0525B32B17/02B32B17/12B32B17/10B32B27/32B32B3/30
CPCH01M10/625H01M10/658H01M10/0525B32B5/02B32B5/26B32B27/12B32B27/32B32B3/30B32B2262/101B32B2307/304Y02E60/10
Inventor 张雅潘乐平程骞蔡毅
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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