Exploring the battery insulation sheet: material secrets
Among the many components of the battery, the battery insulation sheet is small, but it plays a key role in ensuring the safe and stable operation of the battery. It can effectively isolate the conductors of different potentials inside the battery to prevent dangerous situations such as short circuit. What is the material of the battery insulation? Here are the details for you.
Polycarbonate (PC) is a common material for battery insulation. PC insulation sheet is made of insulated and flame retardant PC film as the base material, and has the characteristics of insulation, flame retardant, fire prevention and high efficiency resistance. In the field of new energy batteries, it is often used as an insulating material between cells to prevent short circuits, and its flame retardant performance can also slow the spread of fire when the battery is thermal out of control. PC insulation sheet long-term temperature resistance of up to 130 degrees, black, transparent, frosting semi-transparent and other colors, the thickness is generally between 0.1-1.5 mm, not only good insulation performance, but also has good high temperature resistance, chemical resistance, wear resistance, arc resistance and weather resistance, widely used in electronic appliances, new energy batteries and other fields.
There is also a commonly used polyethylene terephthalate (PET) material, commonly known as Mylar tablet. PET insulation is milky white or light yellow, is a highly crystalline polymer, smooth and shiny surface. It has excellent physical and mechanical properties in a wide temperature range, long-term use temperature up to 120℃, excellent electrical insulation, even at high temperature and high frequency, electrical properties are still good, creep resistance, fatigue resistance, friction resistance and dimensional stability are good. Its common thickness is between 0.1-0.5mm, the biggest feature is good temperature resistance and cheap, widely used in mechanical and electrical, electronics, information communication and other fields, such as car dashboards, game consoles, digital cameras and home appliances in the flexible circuit board has its figure.
In addition, there are PP, PVC and other materials of insulation sheets. PP insulation sheet with high quality fire, flame retardant, insulation, high temperature resistance and other properties, long-term temperature resistance 115 degrees, diverse colors, thickness range of 0.125 mm-1.5 mm, excellent processing performance, soft material, folding easy to form and not easy to break and damage; PVC insulation sheet belongs to the low-end application insulation sheet, temperature resistance of up to 90 degrees, in the low-end power supply, battery and other fields more applications.
Different materials of the battery insulation sheet have advantages and disadvantages, in practical applications, according to the type of battery, the use of the environment, performance requirements and other factors, choose the most appropriate insulation sheet material to ensure the safety and performance of the battery.