Composite formulations for Teijin Automotive Technologies’ cover and tray can be customized to meet OEM specifications

September 12, 2022

AUBURN HILLS, Mich.—An innovative, multi-material battery enclosure manufactured by Teijin Automotive Technologies (formerly Continental Structural Plastics) received the Society of Plastics Engineers (SPE) ACCE People’s Choice Award. The winner of the award is selected from the SPE ACCE Innovation Awards entries by all attendees at the annual automotive composites exposition, Teijin Automotive said in a release.

The full-sized, multi-material battery enclosure features a one-piece composite cover and one-piece composite tray with aluminum and steel reinforcements. By molding the cover and the tray each as one piece, Teijin Automotive said it created a system that is easier to seal and can be certified prior to shipment. Teijin has two patents pending for its innovative box assembly and fastening systems, the company said.

The company also developed a mounting frame using a structural foam for energy absorption. This is said to enable reduced frame thickness and weight while improving crash performance. Because the tray and cover are made from composites, it can be formed into complex shapes while reducing tooling complexity and cost. Composite formulations for the cover and tray can be customized to meet OEM specifications, according to Teijin Automotive.

“As the automotive industry moves toward electrification, Teijin Automotive Technologies’ R&D teams are continually searching for composite solutions that make sense for our customers and the end users,” said Steve Rooney, CEO of Teijin Automotive Technologies and general manager of Teijin Composites Business Unit, in the release. “This full battery enclosure is an example of how composites can make EVs lighter, safer, and less complex from a servicing perspective.”

Teijin Automotive’s multi-material battery enclosure is reported to be 15 percent lighter than a steel battery box. Although it is equal in weight to an aluminum enclosure, the enclosure is said to provide better temperature resistance than aluminum, especially if the phenolic resin system is used. The one-piece design for the tray has no through holes, so no sealing or sealant are required. This eliminates the chance of leaks and reduces overall production costs and complexity, the company said.

Teijin Automotive Technologies specializes in development and production of advanced composite components, including carbon and glass fiber, for the global automotive and transportation industries. The company, an integral part of the Teijin Group of companies, focuses on providing automakers with lightweight, durable products that enable design and packaging flexibility.

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