TotalEnergies Released Battery Coolant Plate Technology
A new passive component for immersion-cooled electric vehicle batteries aims to enhance fire safety during cell venting.
Updated on Oct. 13, 2026 in Electric Vehicles
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TotalEnergies Lubrifiants has introduced the Coolant Keep Plate, a passive technology designed to prevent dielectric fluid displacement in immersion-cooled lithium-ion batteries. The device helps maintain cooling fluid levels during cell venting to improve safety in electric vehicles.
Why it matters
By retaining cooling fluid during gas release, the technology directly addresses a critical failure point in battery thermal management. This development seeks to prevent thermal runaway propagation, which is essential for the long-term safety and stability of electric vehicle battery packs.
In laboratory testing, the Coolant Keep Plate prevented thermal runaway propagation in immersion-cooled systems. TotalEnergies manages these innovations through a network of 42 production sites worldwide and 130 researchers in its specialized R&D centers.
The players
TotalEnergies
An international energy company with operations in 160 countries that manufactures lubricants and invests in advanced battery cooling technologies.
The details
The plate functions as a passive interface positioned between the battery cell group and the venting area. During a venting event, gas jets typically displace dielectric cooling fluid, leaving cells exposed and at risk. This device uses a mechanical separation method to keep liquid surrounding the cells while allowing gases to escape, ensuring the battery remains cool and protected during emergencies.
The Home Front
This development marks a technical evolution in direct immersion cooling technology for lithium-ion batteries. It builds on industry trends to increase battery density and safety without requiring active, power-consuming hardware.
Drivers of electric vehicles should monitor manufacturer safety updates regarding their specific battery cooling systems. While this component is an internal engineering solution, keeping up with official vehicle maintenance schedules remains the best way to ensure your battery health.
The takeaway
This technology highlights how passive engineering can mitigate the risks of thermal events in modern EV batteries. Moving forward, look for vehicle manufacturers to emphasize advanced thermal management systems as a key safety feature in their future model lineups.
Further reading
For more on the latest developments in vehicle power, visit our Electric Vehicles section.
Source note: This article includes information reported by Ai-online.
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