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TotalEnergies Lubrifiants has modified the battery cooling system of the production car (Volvo XC 90 Hybrid) to an immersion cooling system. In this real-scale experiment, no battery or vehicle architecture was changed.
The results were immediately visible on the Volvo cars tested, and the charging time was divided by 4 because the thermal control of the battery was better.
Measurements taken during charging also highlighted the cooling capacity multiplied by seven. Through this procedure, the overall safety and sustainability of lithium batteries is enhanced.
cut costs
Finally, Volvo Cars has reduced battery pack weight by 4 percent and estimated cost by 5.6 percent, thanks to the system being easier to implement.
Gérard Quoirin, Battery Fluid Product Engineer at TotalEnergies, said: “We are very proud of the confidence the automaker has given us in the framework of this innovative project.”
“Our work demonstrates the enormous potential of immersion cooling. The large-scale potential of our system is demonstrated by the successful porting of our system to a production vehicle.”
different technologies
Today, battery cooling is often accomplished through a cooling plate that incorporates antifreeze circuitry. Now, this antifreeze technology is finding its limits, and more heat must be extracted from the battery to enable ultra-fast charging and improve its sustainability. TotalEnergies Lubrifiants has therefore developed a range of fluids with specific thermal properties.
The product is also designed to provide a fluid with a lower environmental impact as measured by life cycle analysis. Finally, the design of the fluid has been well thought out to greatly reduce the risk of battery fire, thereby increasing vehicle safety.
By using innovative dielectric fluids, TotalEnergies Lubrifiants is positioning itself at the forefront of technology that, in the future, will facilitate the deployment of electric vehicles, offering greater range and faster charging. — arab trade news agency
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