Ennovi launches sealing technology for EV, hybrid drivetrain busbars

Singapore – Ennovi has introduced a patent-pending busbar sealing technology designed to prevent coolant leakage in electric and hybrid vehicle (xEV) drivetrain applications, the company announced 8 May.

The Ennovi-SealTech can be applied to busbars and other interconnects in systems such as motors, inverters and oil pump interfaces, according to the company.

The system offers two sealing approaches: double-walled shrink tubing or adhesive tape for more complex use cases, with both options aiming to eliminate secondary processing steps.

The technology is designed to replace conventional sealing methods including potting, rubber O-rings, or gaskets, which the company says may involve additional processing and risk long-term leakage.

“Managing busbar interfaces in EVs where coolant is present on one side and a dry, electrically robust connection is required on the other side, presents several challenges,” said Dominik Pawlik, product portfolio director for power interconnects at Ennovi.

“Conventional sealing methods... incur the high cost and time for secondary processes and/or issues with leakage over the lifetime of the assembly,” he said, adding that the new technologies overcomes such limitations.

Ennovi said it has validated the technology through thermal aging at 150°C for 1,000 hours and thermal shock cycling from -40°C to +150°C for 600 cycles, in accordance with the EN 60068-2 standard.

Leak testing was also performed to confirm sealing performance.

The sealing technology supports a range of busbar designs and is compatible with various metals and plastics, including copper, aluminium, PA66, PBT, and PC.

Based in Singapore, Ennovi is a mobility electrification solutions company specialising in the design, development, and engineering of interconnect systems for EVs.

It was launched in late 2023 as a spin-off from Interplex, and focuses on battery, power, and signal interconnects tailored for EVs.