Introduction to the classification of lithium ion battery electric heating film

The classification of lithium-ion battery electric heating film is divided according to the different electric heating film packaging materials, metal electric heating film, inorganic electric heating film (including carbon fiber electric heating film, ink electric heating film, etc.) and polymer electric heating film. 1. The metal electric heating film for lithium ion batteries is the first generation of thin film heating products. It uses vapor growth and other film forming techniques to attach conductive metal materials to the insulating material, and then cover the surface of the metal layer with a layer of insulating material. The metal layer is tightly wrapped inside to form a thin conductive film. After energization, the internal resistance of the metal heats up, forming an electric heating effect. Commonly used metal electric heating materials are copper and nickel. Different materials have different resistivities, different working voltages and heating powers, and different metal materials cooperate with different circuit designs to meet different user parameter requirements. The choice of different metal materials will also directly affect the cost of the electric heating film. 2. Inorganic electric heating film for lithium ion batteries. Inorganic refers to the conductive material is inorganic, such as graphite, SiC, SiO2, conductive ink, carbon fiber and other conductive silicates. In the non-electro-mechanical heating film, the above-mentioned inorganic conductive materials are mixed with auxiliary materials such as flame retardants and film-forming agents, and they are applied to the insulating substrate together to form a conductive film. When voltage is applied to both ends of the heating film, the conductive layer is actually a layer of semiconductor, which converts electrical energy into heat energy. It should be noted that some inorganic conductive materials are brittle substances at room temperature. For example, SiO2 is an important component of glass. This kind of electric heating film should be coated on a rigid substrate and used as a plate-shaped material. The other part is flexible, such as conductive ink and carbon fiber. Inorganic materials are resistant to high temperatures, have a long life, and are easy to obtain. They are a class of heating equipment with excellent performance. However, the inability to bend and the difficulty in deformation are important reasons that limit the use of inorganic electric heating films. Flexible inorganic electric heating film can be more widely used. 3. The polymer electric heating film for lithium ion batteries is made by adding conductive particles to organic materials, processing them into thin film materials and then packaging, or applying conductive materials on the insulating material substrate to make organic conductive films, and then use polymer insulation Material encapsulation. Generally, the working temperature is not as high as that of an inorganic electric heating film. In the category of organic electric heating films, silica gel heating films, polyimide heating films, and PET heating films are all widely used categories. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: About the introduction of lithium-ion battery BMS