Thermal insulation structural adhesive for new energy power battery and manufacturing method of thermal insulation structural adhesive
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A technology for power batteries and structural adhesives, applied in secondary batteries, circuits, adhesives, etc., can solve the problems of low shear bond strength, reduced safety, and insufficient structural strength of CTP battery packs.
Pending Publication Date: 2021-10-08
SHENZHEN GOLDLINK TONGDA ELECTRONICS CO LTD +1
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[0006] 2) Graphite-based intumescent materials are mixed in a thermal insulation layer composed of thermoplastic elastomers, ceramic-based intumescent materials, vermiculite / mineral fiber-based intumescent materials, and ammonium polyphosphate-based intumescent materials. There is shear bonding The obvious defect of too low strength is not enough to achieve the structural strength required by the CTP battery pack, and its safety is reduced instead
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Embodiment 47
[0122] A composition, block polymerization process of telechelic carboxyl compound base material——
[0123] 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 siloxane and telechelic carboxyl polybu...
Embodiment 48
[0131] In a reactor A with high-speed stirring and high-shear dispersing device, according to Table 1, first add at least one of the telechelic carboxyl compound and / or telechelic amino compound base material, coupling agent and / or Or modifiers, curing accelerators, heat insulating powders, flame retardant ingredients;
[0132] 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, heat insulating powder, flame retardant components;
[0133] 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 50 Specifications of powder; eve...
Embodiment 49
[0135] 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-insulating structural adhesive for a new energy power battery and a manufacturing method of the heat-insulating structural adhesive. A composition A contains 16-31% of a block polymerization telechelic carboxyl compound and telechelic amino compound, 0-1.5% of a coupling agent and modifier, 0-2.5% of a curing accelerator, 44-62% of heat-insulating powder and 15-26% of a flame-retardant component; a composition B contains 16 to 31% of block polymerization telechelic isocyanate group compound and telechelic epoxy group compound, 0 to 1.5% of coupling agent and modifier, 0 to 2.5% of curing accelerator, 44 to 62% of heat insulation powder and 15 to 26% of a flame retardant component; the method is characterized by uniformly mixing 1 part of the composition A and 0.25-2 parts of the composition B according to the volume ratio and curing; the density is smaller than 0.6 g / cm<3>, the heat conductivity coefficient is smaller than 0.08 W / (m.K), the tensile strength is larger than or equal to 5 MPa, the elongation at break is larger than or equal to 23%, the shear bonding strength is larger than or equal to 4 MPa, the breakdown strength is larger than or equal to 12.4 kV / mm, the volume resistivity is larger than or equal to 2.4*10<13>, and the flame retardance V0 is extinguished when being away from fire; and the requirements of thermal insulation and structural strength of a leading CTP battery pack in the service period 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-insulating functional materials, and specifically relates to a heat-insulating structural adhesive for new energy power batteries and a manufacturing method thereof. Background technique [0002] The global new energy vehicle technology is developing rapidly, and its development trend is difficult to change in the foreseeable future. The core technology of new energy vehicles is that the energy density and total electric energy index of power batteries are getting higher and higher, and the storage and conversion functions of electric power exist in the same space. One of the new problems is that the heat density per unit volume or unit area is getting higher and higher, and the safety, reliability and environmental adaptability of the power battery pack are also prominent during the service period and e...
Claims
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