Sekisui Mobility Solution　- Environment -

The SEKISUI CHEMICAL Group provides materials that contribute to improving the safety and performance of batteries, especially the bonding, heat dissipation, and molding technologies we have developed over time.

2023-05-31

Challenge

Managing battery temperatures is considered important in order to maintain performance stability, safety, and battery life for EVs (electric vehicles).

For example, in low temperatures, the internal resistance of battery cells increases, affecting performance and lifespan, and this may prevent proper charging.
In high temperatures, there are effects on output density, causing drops in acceleration performance and thermal runaway, which can damage the battery and cause fires.
In addition, to improve the range of EVs, LiB are becoming increasingly higher in capacity, so both lightness and safety need to be balanced.

Moreover, there are also the background issues of global warming and the energy problem, so the needs for environmentally-friendly materials for making automobile parts is growing more and more.

Solution

For example, in our heat dissipation products, which are well regarded for their reliability when used in EV batteries in Europe, we have a lineup of grease and sheet-type products, and can provide materials that offer flexibility, adhesiveness, low volatility, low density, and so on.

In addition, we have technologies that contribute to the safety of battery packs such as shock-absorbing materials that combine low flammability with superior thermal insulation and heat retention properties, fire protection materials that prevent fires from spreading by expanding to create a thermal barrier when a fire breaks out, and thermoplastic resin sheets (currently under development) that combine inflammability, fire retardation, and thermal insulation.

In addition, we are working on the development of environmentally-friendly products that use plant-based or recycled raw materials, contributing to the reduction of CO2 emissions.