The supplier Benteler has presented an effective cooling system for electric vehicles. The high-pressure heat exchanger is only the size of a packet of cigarettes and is designed to couple the battery cooling and air conditioning systems – providing more efficient cooling performance in some situations.
The high-pressure heat exchanger is designed to be easily installed in the vehicle’s air conditioning circuit, according to the company’s statement. “Coupling battery cooling and air conditioning in this way increases the cooling power available during charging,” says Jens-Eike Jesau, the developer responsible at Benteler. “This shortens the battery charging time.”
Shorter charging times are a factor in widespread acceptance of electric cars, the company says. The charging power (and thus the duration of the charging process) is limited, among other things, by the heat generated by the battery during fast charging. On the one hand, the high-pressure heat exchanger should make it possible to use the cooling power of the interior air conditioning system for battery cooling. On the other hand, it should also be possible to use waste heat from the battery to heat the passenger compartment if required.
The heat exchanger uses CO2 as a coolant; in this function CO2 is referred to as R744. Before entering the cooler, the refrigerant is liquefied. There it evaporates and absorbs the waste heat from the battery charging process – the simple and familiar principle of a heat exchanger. With the high-pressure version, however, the cooling capacity is supposed to be “considerably higher” according to Benteler – but the exact cooling capacity is not quantified in the press release.
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January 29, 2021 at 11:02PM
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Benteler presents new high-pressure heat exchanger - www.electrive.com
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