Using precision coating equipment, prepare a layer of 2-3μm coating on the Porous polyethylene/polypropylene film, which is composed of water, organic additives and inorganic substances.
| product name | unit | Battery Barrier Film | test method | |
| thickness | μm | 9+3 | micrometer | |
| width | mm | ＜1020 | tape measure | |
| Areal density | g/㎡ | 9.5 | gravimetric method | |
| air permeability | Sec/100cc | 170±50 | Air Permeability Tester | |
| Puncture strength | gf | ＞400 | Puncture strength tester | |
| tensile strength | Mpa | MD | 100 | Tensile machine |
| TD | 130 | Tensile machine | ||
| Elongation | % | MD | ＞40 | |
| Heat shrinkage | % | MD | 0≤MD≤2 | 105±2℃，60min |
| TD | 0≤MD≤1 | |||
| water content | ppm | ≤1000 | Coulomb method | |
The coating expands when heated, blocking the micropores of the film to avoid short circuit, and has good flame retardancy to avoid thermal runaway of the battery.
Improve the high temperature resistance of the film, so that it can still ensure the integrity of the diaphragm at 180 ℃.
The nano-coating can form a solid solution in the lithium battery to improve the rate and cycle performance.
Solve the problem of thermal conductivity of PP/PE materials.
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