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Temperature-control flame-retardant phase-change material for power lithium ion battery, preparation method of temperature-control flame-retardant phase-change material and lithium ion battery

A lithium-ion battery and phase-change material technology, applied in the field of lithium-ion battery flame-retardant materials, temperature-controlled flame-retardant phase-change materials for power lithium-ion batteries and their preparation, can solve volume expansion, poor thermal stability, and reduced diaphragm thickness Short-circuit risk and other issues, to achieve the effect of mild conditions, good shapeability, and good latent heat of phase change

Pending Publication Date: 2022-04-12
HAIKE GRP RES INST OF INNOVATION & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, although the application of new main materials has greatly improved the energy density of batteries, it has also brought great challenges to the safety performance of batteries, such as high-nickel cathode materials (nickel-cobalt-manganese 622, nickel-cobalt-manganese 811, nickel-cobalt-manganese 811, nickel-cobalt-manganese, etc. Cobalt-aluminum, LNMO, etc.) poor thermal stability, volume expansion of silicon-carbon materials during charging and discharging, short-circuit risk caused by reduction in diaphragm thickness, etc.

Method used

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  • Temperature-control flame-retardant phase-change material for power lithium ion battery, preparation method of temperature-control flame-retardant phase-change material and lithium ion battery
  • Temperature-control flame-retardant phase-change material for power lithium ion battery, preparation method of temperature-control flame-retardant phase-change material and lithium ion battery
  • Temperature-control flame-retardant phase-change material for power lithium ion battery, preparation method of temperature-control flame-retardant phase-change material and lithium ion battery

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Effect test

preparation example Construction

[0060] The present invention also provides a method for preparing a flame-retardant phase-change material, comprising the following steps:

[0061] 1) After heating and mixing diluent, resin, solid porous material, polyester polyol and / or polyether polyol, flame retardant and heat conduction agent, then add coupling agent or curing agent and continue stirring and mixing to obtain a mixture ;

[0062] 2) After curing and pressing the mixture obtained in the above steps, a flame-retardant phase change material is obtained.

[0063] In the preparation method of the flame-retardant phase change material of the present invention, the type, selection and addition amount of raw materials, and the corresponding preferred principles are the same as the type, selection and addition amount of the raw materials in the aforementioned flame-retardant phase change material, and the corresponding The optimization principles can all be corresponding, and will not be repeated here.

[0064] I...

Embodiment 1

[0086]The preparation method of solid-solid phase change material: Weigh the raw materials according to the mass ratio of neopentyl glycol, epoxy resin, graphene, and hexafluorocyclotriphosphazene at 65:25:8:2, and mechanically pulverize the neopentyl glycol to 50 μm; add crushed neopentyl glycol, epoxy resin, graphene, and hexafluorocyclotriphosphazene into the stirring tank, heat to 80°C and stir for 3 hours; then add epoxy resin with a mass ratio of 1% for curing The agent triethylenetetramine is continuously stirred for a certain period of time; the above-mentioned mixed material is pressed and solidified at a high temperature of 150°C according to the sheet structure to obtain a solid-solid phase change composite material.

[0087] The above-mentioned solid-solid phase change composite material is wrapped around the battery cell or pasted inside the battery PACK for use.

[0088] Performance testing was performed on the temperature-controlled flame-retardant organic phase...

Embodiment 2

[0095] The preparation method of solid-solid phase change material: weigh 1,6-hexanediol, phenolic resin, expanded shale, graphene, hexamethylcyclotriphosphazene according to the mass ratio of 70:20:5:3:2, First, mechanically crush 1,6-hexanediol and expanded shale to 50 μm, then physically mix with graphene and hexamethylcyclotriphosphazene; then add phenolic resin to the stirring tank, heat to 70°C and stir for 2 hours; Then add a curing agent hexamethylenetetramine with a weight ratio of 2% of epoxy resin, and continue to stir for a certain period of time; press and cure the above-mentioned mixed material at a high temperature of 170°C according to the sheet structure to obtain a solid-solid phase change composite material .

[0096] The above-mentioned solid-solid phase change composite material is wrapped around the battery cell or pasted inside the battery PACK for use.

[0097] Performance testing was performed on the temperature-controlled flame-retardant organic phas...

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Abstract

The invention provides a flame-retardant phase change material, which is prepared from the following raw materials in parts by mass: 1 to 90 parts by weight of polyhydric alcohol, 1 to 90 parts by weight of resin, 1 to 10 parts by weight of solid porous material, 0.1 to 7 parts by weight of flame retardant, 0.1 to 5 parts by weight of heat conduction agent and 0.01 to 2 parts by weight of coupling agent and / or curing agent. The temperature-control heat-conduction phase-change material is obtained by taking polyhydric alcohol and the like as a phase-change agent, taking resin as a support body of the phase-change material, taking a solid porous material as an auxiliary setting agent, combining with a specific heat-conduction agent and a flame retardant, uniformly mixing the phase-change agent, the support body, the auxiliary setting agent, the heat-conduction agent and the flame retardant, and polymerizing or curing. The solid-solid phase change composite material provided by the invention is wide in phase change temperature range, large in phase change latent heat and adjustable in phase change temperature and phase change latent heat, does not need complex use devices and packaging containers with good sealing performance, and is wider in application occasion and lower in system cost.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant materials for lithium-ion batteries, and relates to a flame-retardant phase-change material and a preparation method thereof, and a lithium-ion battery, in particular to a temperature-controlled flame-retardant phase-change material for power lithium-ion batteries and a preparation method thereof, Lithium Ion Battery. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, high voltage, long life, and no memory effect. According to different application scenarios, lithium-ion batteries are mainly divided into three categories: power, consumption, and energy storage. Traditional consumer batteries are mainly used in mobile phones, computers and other electronic products. Under the harsh conditions of energy shortage, environmental pollution and climate warming, the development of new energy vehicles is very important for solving energy and environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C09K5/14C09K21/12A62D1/00H01M10/0525H01M10/617H01M10/653H01M10/659
Inventor 张聪陈忠洲苗力孝
Owner HAIKE GRP RES INST OF INNOVATION & TECH
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