High-thermal conductivity insulating film for lithium ion and preparation method thereof
A high thermal conductivity, insulating film technology, used in electrical components, electrochemical generators, circuits, etc., can solve problems such as lithium-ion battery safety problems, thermal runaway, short circuit or overcharge that cannot be fundamentally solved , to achieve the effects of easy operation, high thermal conductivity and simple preparation method.
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[0027] Example 1
[0028] Step 1: The polypropylene material with a thermal conductivity of 0.23W / mk is pulverized into particles with a diameter of <1mm using a pulverizer, where the weight of the polypropylene material accounts for 80%;
[0029] Step 2: Use a hot melt machine to heat it to 200±5℃ to melt it, add Al2O3 with a particle size of 100~500 microns in proportion, and the mass of Al2O3 accounts for 20% of the total mass, stir for 5h to make the two materials sufficient Evenly mix
[0030] Step 3: Put into the feeding system again, pass the plasticizer, prepare a film with a thickness of 0.15mm, and then cool it
[0031] Step 4: After the film is cooled, use a cutting machine to cut into figure 1 The shape shown is prepared into the high thermal conductivity insulating film.
[0032] Five pieces of the above insulating film were immersed in the electrolyte and placed in a thermostat at 60°C for 7 days to observe the corrosion resistance of the insulating film. Its surface is...
Example Embodiment
[0035] Example 2
[0036] Step 1: Use a pulverizer to pulverize polypropylene with a thermal conductivity of 0.23W / mk into particles with a diameter of <1mm, wherein the weight of polypropylene material accounts for 80%;
[0037] Step 2: Use a hot melt machine to heat it to 200±5℃ to melt it, add SiO2 with a particle size of 100~500 microns in proportion, and the mass of the SiO2 accounts for 20% of the total mass. Stir for 5h to make the two materials Mix thoroughly and evenly;
[0038] Step 3: Put into the feeding system again, pass through the plasticizer, prepare a film with a thickness of 0.15mm, and then cool it
[0039] Step 4: After the film is cooled, use a cutting machine to cut into figure 1 The shape shown is prepared into the high thermal conductivity insulating film.
[0040] Five pieces of the above insulating film were immersed in the electrolyte and placed in a thermostat at 60°C for 7 days to observe the corrosion resistance of the insulating film. Its surface is sm...
Example Embodiment
[0043] Example 3
[0044] Step 1: Use a pulverizer to pulverize polypropylene with a thermal conductivity of 0.23W / mk into particles with a diameter of <1mm, wherein the weight of polypropylene material accounts for 80%;
[0045] Step 2: Use a hot melt machine to heat it to 200±5℃ to melt it, add BN with a particle size of 100~500 microns in proportion, and the mass of the BN accounts for 20% of the total mass, stir for 5h to make the two materials sufficient Evenly mix
[0046] Step 3: Put into the feeding system again, pass through the plasticizer, prepare a film with a thickness of 0.15mm, and then cool it
[0047] Step 4: After the film is cooled, use a cutting machine to cut into figure 1 The shape shown is prepared into the high thermal conductivity insulating film
[0048] Five pieces of the above insulating film were immersed in the electrolyte and placed in a thermostat at 60°C for 7 days to observe the corrosion resistance of the insulating film. Its surface is smooth, no t...
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