Heat-conducting structural adhesive for new energy power battery and manufacturing method thereof

A heat-conducting structure and power battery technology, which is applied in the direction of adhesives, epoxy resin glue, rubber-derived glue, etc., can solve the problems of fracture failure of the bonding surface, low shear bond strength and tensile strength of heat-conducting glue, and unsatisfactory problems.

Pending Publication Date: 2021-10-22
SHENZHEN GOLDLINK TONGDA ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Based on the requirements of "12m free fall, 45 tilt impact, no short-circuit burning" or 25G deceleration impact of automobile battery packs, DFEAM analysis shows that the shear viscosity The bonding strength should be ≥8MPa, and the tensile strength should be ≥13MPa. Obviously, the above-mentioned patented technology cannot meet the requirements of replacing the fixed components of the new energy vehicle power battery module. Inherent defect of too low tensile strength
[0008] For pure epoxy resin system thermal conductive structural adhesive, although its shear bonding strength and tensile strength can meet the requirements of new energy battery module thermal There is a risk of bonded surface fracture and failure in long-term impact environments

Method used

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  • Heat-conducting structural adhesive for new energy power battery and manufacturing method thereof
  • Heat-conducting structural adhesive for new energy power battery and manufacturing method thereof
  • Heat-conducting structural adhesive for new energy power battery and manufacturing method thereof

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Experimental program
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Effect test

Embodiment 47

[0126] Embodiment 47, step (1):

[0127] A composition, block polymerization process of telechelic carboxyl compound base material——

[0128] In reactor A, add any one of isocyanate or epoxy resin or epoxy polyalkylsiloxane, telechelic carboxypolybutadiene according to the mass ratio in Table 1, start the stirring device to make isocyanate or epoxy Base resin or epoxy-based polyalkylsiloxane and telechelic carboxypolybutadiene are mixed uniformly; when the added material is isocyanate and telechelic carboxypolybutadiene, the temperature of the material is controlled at (25-45 )°C, and the holding time is 6h, the reaction product is obtained according to the chemical structural formula (2); when the added material is epoxy resin and telechelic carboxy polybutadiene, the temperature of the material is controlled between (75~135)°C Between, and holding time 4.0h, reaction product is gained according to chemical structural formula (3); When adding material is epoxy polyalkyl silo...

Embodiment ，48

[0135] Embodiment, 48 steps (two):

[0136] In a reactor A with high-speed stirring and high-shear dispersing device, according to Table 1, at least one of the telechelic carboxyl compound and / or telechelic amino compound base material, coupling agent and / or modifiers, curing accelerators, thermally conductive powders, flame retardant components;

[0137] In a B reactor with a high-speed stirring and high-shear dispersing device, according to Table 2, first add at least one of the telechelic isocyanate-based compound and / or the telechelic epoxy-based compound according to step (1), Coupling agent and / or modifier, curing accelerator, thermal conductive powder, flame retardant components;

[0138] In reactor A and reactor B respectively, according to the average particle size of the powder D 50 The specifications are divided into three batches of "fine→medium→coarse", and the thinnest D is added first 50 Specification of powder → sub-fine D 50 Specification powder→coarse D ...

Embodiment 49

[0139] Embodiment 49, step (3):

[0140] Start the vacuum pump at the same time or at the later stage of step (2), slowly reduce the pressure in the reactor to -0.1MPa, and maintain the pressure at -0.1MPa for (0.25-1.5) hours.

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Abstract

The invention discloses a heat-conducting structural adhesive for a new energy power battery and a manufacturing method thereof. The heat-conducting structural adhesive comprises the following components in percentage by weight: 3-14% of a component A containing at least one of block polymerization telechelic carboxyl and block polymerization telechelic amine compounds, 3-14% of a component B containing at least one of block polymerization telechelic isocyanate and block polymerization telechelic epoxy compounds, 0.1-1% of a coupling agent and a modifier, 0-1.6% of a curing accelerator, 84-92% of heat-conducting powder and 0.3-3% of a flame-retardant component; and telechelic carboxyl group, telechelic amine group, telechelic isocyanate group and telechelic epoxy group compound block polymerization methods are adopted. The component A and the component B are mixed and cured according to the proportion of 0.25-2 parts, the actually measured heat conductivity coefficient is 6-11 W/(m.K), the tensile strength is 44-16 MPa, the elongation at break is 11-78%, the shear bonding strength is 0.7-15 MPa and can be continuously regulated and controlled, and the flame retardance is V0 which is extinguished when being away from fire; and the requirement of the CTP battery pack on the strength of the heat-conducting structure can be met.

Description

technical field [0001] The invention belongs to the design and manufacture of polymer-based composite polymer materials, high-strength bonding structural materials, and heat-conducting functional materials, and specifically relates to a heat-conducting structural adhesive for new energy power batteries and a manufacturing method thereof. Background technique [0002] With the accelerated development of new energy vehicle technology, the energy density and battery capacity requirements of power batteries are also getting higher and higher. The power battery module generates more and more heat during work, and long-term high temperature will affect the cruising range of new energy vehicles. , reduce the service life of the power battery, and even cause safety accidents. [0003] At present, new energy vehicle power battery modules will be equipped with a water-cooled active cooling system, and thermal interface materials will be used as the heat-conducting link between the bat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J109/00C09J115/00C09J187/00C09J183/10C09J163/00C09J183/08C09J171/02C09J183/12C09J183/06C09J11/04C09J11/06
CPCC09J109/00C09J115/00C09J187/00C09J183/10C09J163/00C09J183/08C09J171/02C09J183/12C09J183/06C09J11/04C09J11/06Y02E60/10
Inventor 胡黎明肖扬华陈武洲缪宗倍
Owner SHENZHEN GOLDLINK TONGDA ELECTRONICS CO LTD
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