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Polyurethane foaming rubber, preparation method and application thereof, and soft package lithium ion battery

A technology of polyurethane foam and foaming agent, which is applied in polyurea/polyurethane adhesives, secondary batteries, battery pack components, etc., and can solve problems affecting the electrical performance and safety performance of batteries, and prone to deformation. , to achieve excellent mechanical properties and mechanical properties, reduce deformation, and ensure the effect of mechanical support

Pending Publication Date: 2021-12-31
HUIZHOU LIWINON NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since there is an overhang between the polyurethane foam and the aluminum-plastic film in the length direction, and the positive and negative electrodes are less deformed in the length direction, the safety hazard of the battery cell in the length direction is small; but in the width direction of the battery cell, There is a certain gap between the edge of the bare cell and the inner casing of the aluminum-plastic film, because the side of the bare cell is not supported, and it is prone to deformation, which affects the electrical performance and safety performance of the cell, so a technical solution to solve the above problems is urgently needed

Method used

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  • Polyurethane foaming rubber, preparation method and application thereof, and soft package lithium ion battery
  • Polyurethane foaming rubber, preparation method and application thereof, and soft package lithium ion battery
  • Polyurethane foaming rubber, preparation method and application thereof, and soft package lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Weigh 500g of polyadipate-1,4-butylene glycol ester diol, 200g of diphenylmethane diisocyanate, 100g of 1,4-butanediol, and 10g of triethylenediamine, and heat the above raw materials to 100°C, and vacuum dehydration for 2h; add the dehydrated diphenylmethane diisocyanate dropwise to the dehydrated poly(1,4-butylene adipate)diol, stir for 0.5h, rotate at 1000r / min, and then drop Add the dehydrated cross-linking agent and catalyst, stir for 1h, rotate at 1000r / min, and raise the temperature to 80°C at the same time to obtain component 1;

[0037] Mix 30g of vinyltriethoxysilane, 20g of fluorodichloroethane, 30g of graphene and 60g of water and dichloromethane at room temperature, heat to 85°C, and vacuum dehydrate for 1h; after the reaction, cool to 30 °C to obtain component two.

[0038] Mix components 1 and 2 with a styrofoam glue gun and fill them into the left and right gaps between the cell and the inner pit of the aluminum-plastic film 1, cure at room temperature ...

Embodiment 2

[0040] Weigh 500g polyadipate-1,4-butylene glycol ester diol, 250g dodecylbenzene-2,4-diisocyanate, 100g 1,4-butanediol, 10g triethylenediamine, and mix the above raw materials Heat to 100°C respectively, and vacuum dehydrate for 2h; add the dehydrated diphenylmethane diisocyanate dropwise to the dehydrated poly(1,4-butylene adipate)diol, stir for 0.5h, and rotate at 1000r / min, then drop the dehydrated crosslinking agent and catalyst respectively, stir for 1h, rotate at 1000r / min, and raise the temperature to 80°C at the same time to obtain component one;

[0041]Mix 30g of vinyltriethoxysilane, 30g of fluorodichloroethane, 25g of silicon dioxide and 60g of water and dichloromethane at room temperature, heat to 85°C, and vacuum dehydrate for 1h; after the reaction, cool to Component 2 was obtained at 30°C.

[0042] Mix components 1 and 2 with a styrofoam glue gun and fill them into the left and right gaps between the cell and the inner pit of the aluminum-plastic film 1, cur...

Embodiment 3

[0044] Weigh 500g polyadipate-1,4-butylene glycol ester diol, 250g dodecylbenzene-2,4-diisocyanate, 100g 1,4-butanediol, 10g triethylenediamine according to the rights Heat to 100°C and vacuum dehydrate for 2h; add the dehydrated diphenylmethane diisocyanate dropwise to the dehydrated poly(1,4-butylene adipate)diol, stir for 0.5h, and rotate at 1000r / min, then drop the dehydrated cross-linking agent and catalyst respectively, stir for 1 h at a speed of 1000 r / min, and raise the temperature to 80°C at the same time to obtain component 1;

[0045] Mix 30g of vinyltriethoxysilane, 20g of fluorodichloroethane, 25g of calcium oxide and 50g of water and dichloromethane at room temperature, heat to 85°C, and vacuum dehydrate for 1h; after the reaction, cool to 30 °C to obtain component two.

[0046] Mix components 1 and 2 with a styrofoam glue gun and fill them into the left and right gaps between the cell and the inner pit of the aluminum-plastic film 1, cure at room temperature f...

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Abstract

The invention belongs to the technical field of high polymer materials, and particularly relates to polyurethane foaming rubber, a preparation method and application thereof, and a soft package lithium ion battery. The polyurethane foaming rubber is prepared from the following raw materials in parts by weight: 50-80 parts of polyol, 20-50 parts of isocyanate, 10-15 parts of a cross-linking agent, 0.1-0.3 parts of a catalyst, 2-10 parts of an elasticity regulator, 1-5 parts of an accelerant, 2-8 parts of a nucleating agent and 5-15 parts of a foaming agent. The polyurethane foaming rubber provided by the invention has excellent mechanical properties and mechanical properties, can play a role in buffering and shock resistance, provides buffering and supporting for the side edge of a naked battery cell, reduces the deformation of an aluminum plastic film, and improves the safety performance of a battery cell.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a polyurethane foam, its preparation method and application, and a soft-pack lithium-ion battery. Background technique [0002] Soft-pack batteries are mostly used in the field of lithium-ion batteries, which means that a polymer shell-aluminum-plastic film is placed on the outer layer of the bare cell. Compared with aluminum case / steel case batteries, the advantages of pouch batteries are light weight, high battery capacity, good safety, and flexible design, so they are widely used in consumer lithium batteries. The positive electrode, negative electrode and polyurethane foam are wound into a bare cell and placed in a pre-punched aluminum-plastic film case. Since there is an overhang between the polyurethane foam and the aluminum-plastic film in the length direction, and the positive and negative electrodes are less deformed in the length direction, the sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C09J175/08C08J9/10H01M10/0525H01M10/058H01M50/202H01M50/231H01M50/242
CPCC09J175/08C09J175/06C08J9/102C08J9/105C08J9/107H01M50/242H01M50/231H01M50/202H01M10/058H01M10/0525C08J2375/08C08J2375/06Y02E60/10Y02P70/50
Inventor 李叶珠江建华刘关心于子龙陈杰杨山
Owner HUIZHOU LIWINON NEW ENERGY TECH CO LTD
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