Battery insulation layer: the key to ensure battery safety and performance

The most important function of the battery insulation layer is to prevent short circuit between cells. In the battery module, the cell is closely arranged, if there is no good insulation layer, once the positive and negative poles accidentally contact, it will cause a short circuit, which may lead to serious consequences such as overheating, fire and even explosion of the battery. The insulation layer can effectively isolate the positive and negative electrodes of the cell to avoid the occurrence of such dangerous situations.

Common battery insulation materials are rich and varied. Gas insulation materials such as air, nitrogen, etc., with self-recovery ability, stable permittivity, minimal dielectric loss, often used in closed battery packs to prevent the external environment from affecting the battery; The liquid insulating material is the insulating oil, which is mainly used to fill the void, improve the dielectric property and heat dissipation capacity, and is crucial to maintain the temperature stability of the battery module during high power discharge. Solid insulating materials are divided into inorganic and organic two categories, inorganic such as mica, electric porcelain and other high temperature resistance but poor processing performance, organic like insulating paint, plastic and other flexible but easy to process aging and poor heat resistance, they can provide mechanical support while isolating the conductor. In addition, new materials such as powder coatings, high-shear insulation materials, and high-temperature resistant polymers are also emerging and applied to the field of battery insulation.

With the rapid development of battery technology, higher requirements are also put forward for battery insulation layer. In the future, insulation materials will develop in the direction of higher voltage resistance, better thermal stability, stronger mechanical strength and better durability to meet the needs of the growing electric vehicle and energy storage market. At present, with the vigorous development of the new energy industry, the research and innovation of the battery insulation layer will continue to promote the progress of battery technology and provide a more reliable guarantee for new energy applications.