Electric vehicle battery case blocks electromagnetic waves

According to Nikkei Asia, Japanese metal manufacturer Proterial has successfully developed a new material used in electric vehicle (EV) battery casings that can block electromagnetic waves.

Electric cars have more electronics than gasoline-powered cars. The electromagnetic waves emitted by electrical devices can interfere with the operation of the vehicle's equipment and can lead to accidents. Therefore, manufacturers often cover batteries and other parts of the car with aluminum to block the electromagnetic waves.

Proterial has developed a thin-film alternative to aluminum, made mostly of iron sheets sandwiched between films. The battery and other components will be covered with this film and a plastic layer to dampen vibrations. The new housing will make EV batteries about 30 percent lighter than aluminum.

When combined with the use of this material in other components, such as the onboard charger, the overall weight of an EV can be reduced by more than 10%. By changing the adhesive and film material, Proterial has increased the heat resistance from 80oC to 130oC, making the material suitable for a wider range of applications, including EV batteries.

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