Batteries are the source of kinetic energy for pure electric vehicles. The safety hazards of the batteries seriously endanger the safety of the entire vehicle. When the batteries are working, they will generate a certain amount of heat, and can produce a certain degree of thermal expansion and contraction effects at different temperatures. , Resulting in a certain expansion of the battery core, long-term capacitance grid friction between the battery cores, it is likely to cause damage to the battery core and cause the rechargeable battery to become ineffective, or even uncontrollable in severe cases. In addition, the output voltage of the battery pack is above 200V. It is stipulated that the rechargeable battery case must be sealed and waterproof to avoid water seepage and cause circuit short circuit. The waterproof level of the rechargeable battery case is specified to be IP67.

Silicone foam has high shrinkage and reduction characteristics, avoids deformation caused by thermal expansion and contraction of the rechargeable battery cell during the whole process of battery charging and charging and discharging, and has excellent durability, low shrinkage, and impact digestion and absorption. And flame retardancy (UL 94 V0 rating). At the same time, silica gel also has good waterproof performance, as well as the following properties, so it is widely used in the thermal insulation of the buffer of new energy batteries and the sealing of the outer frame.

1. Under different temperatures, the performance of silicone foam is stable, and the performance of the product seal ring is stable.
2. Excellent waterproof and sealing performance, no water seepage when the product is used outside
3. Long-term reduction has little damage, and has a certain ability to contain and reduce deformation
4. Excellent flame retardant performance, which can effectively prevent the risks caused by thermal effects during battery operation
5. The thickness and strength can be designed according to different standards. The sealing ring must be well matched with the casing and the internal stress is low, which can effectively prevent the sealing ring from bending and arching. The silicone foam gasket is used in the sealing of the outer frame of the new energy power lithium battery. .