What are the applications of polyimide film in the field of new energy
Polyimide film has been widely used in the field of new energy due to its excellent high temperature resistance, insulation, chemical corrosion resistance, and good mechanical properties, mainly including the following aspects:
Polyimide film has been widely used in the field of new energy due to its excellent high temperature resistance, insulation, chemical corrosion resistance, and good mechanical properties, mainly including the following aspects:
1. In the field of new energy vehicle batteries
Thermal management system protection: Polyimide film can be used as a battery separator coating for long-term use at temperatures up to 300 ℃, preventing the separator from melting and shrinking at high temperatures and preventing short circuits between the positive and negative electrodes. The composite film made by adding thermal conductive fillers can quickly conduct battery heat and avoid local overheating.
Battery insulation and packaging: It has good flexibility and chemical stability, and can be used as insulation, sealing, and packaging materials for batteries to prevent electrolyte corrosion of other components and prevent electrolyte leakage. In lithium sulfur batteries, it can prevent the leakage of polysulfides and extend the battery cycle life.
Improving battery performance: Coating on the surface of lithium-ion battery separators can enhance their high temperature resistance and mechanical strength, improve their wettability with electrolytes, optimize ion transport channels, and thus improve battery charging and discharging efficiency and energy density.
2. New energy vehicle motor field
Enhanced insulation performance: New energy vehicle drive motors generate high temperatures and voltages during operation. The excellent electrical insulation performance, high temperature resistance, and low dielectric constant of polyimide film make it an ideal material for motor insulation. The use of polyimide coated enameled wire can enhance the high power of electric vehicle drive motors, improve motor efficiency and reliability.
Extend motor life: Anti corona polyimide film is applied to the drive motor of new energy vehicles, which can withstand corona discharge during motor operation, reduce insulation material aging and damage, effectively extend motor life, and reduce maintenance costs.
3. In the field of solar cells
As an encapsulation layer, polyimide film can protect solar cells from external environmental influences and extend their service life. It has excellent transparency and conductivity, and can also be used as a transparent electrode material to improve the photoelectric conversion efficiency of solar cells.
For steel mesh printing: Ultra thin polyimide film can be used for solar steel mesh printing, reducing the amount of silver paste used in solar steel mesh and lowering production costs.
4. Fuel cell field: Polyimide film can be used as the electrolyte membrane of fuel cells, which has excellent gas permeability and chemical corrosion resistance, and can improve the efficiency and stability of fuel cells.
5. In the field of flexible circuits: With the development of intelligent and lightweight new energy vehicles, the demand for flexible circuit boards (FPCs) has increased. Polyimide film, as an ideal substrate for FPC, has the characteristics of thin, light, and flexible, as well as excellent insulation performance, heat resistance, and mechanical strength. It can be repeatedly bent, suitable for 3D assembly, meets the complex wiring requirements inside automobiles, improves space utilization, and reduces vehicle weight.
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