In Pictures: TotalEnergies unveils passive Coolant Keep Plate to boost safety of immersion-cooled EV batteries

Immersion cooling targets the thermal risks that conventional engine engineering cannot fully address in high-voltage EV battery packs.

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The Coolant Keep Plate is designed to keep dielectric fluid in contact with cells during a venting event.

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Battery safety remains a key hurdle for wider EV adoption as packs grow denser and more powerful.

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TotalEnergies Lubrifiants tested the passive plate across multiple battery configurations and failure scenarios.

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Preventing thermal runaway propagation is central to improving consumer confidence in electric vehicles.

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In tests where packs otherwise failed, the plate reportedly prevented fire and cell-to-cell propagation.

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Passive components like the Coolant Keep Plate add a safety layer without active fluid circulation systems.

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The development reflects growing industry focus on immersion cooling as a route to safer, higher-density batteries.

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TotalEnergies positions the plate as a complement to immersion cooling rather than a replacement for pack-level safeguards.

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