New High-pressure Heat Exchanger Uses CO2 as The Cooling Medium

Press Release Summary:

  • Natural refrigerant with the designation R744 is liquefied before entering the cooler
  • Evaporates and absorbs the waste heat from the battery charging process
  • Coupling battery cooling and air conditioning increases the cooling power available during charging

Original Press Release:

Electric Vehicles: Shorter Charging Times Thanks to High-pressure Heat Exchanger from BENTELER

Battery cools and charges significantly faster than conventional solutions.

Salzburg, Austria and Paderborn, Germany, Jan. 28, 2021 /PRNewswire/ -- Together with range, battery charging time is one of the key issues in electromobility. "Car owners don't like the fact that the charging process currently still takes a relatively long time. They feel that this restricts their mobility and flexibility," explains Dr. Rainer Lübbers, Executive Vice President of the responsible business unit at BENTELER Automotive. Shorter charging times are therefore a factor in promoting the politically desirable broad acceptance of electric vehicles. Up to now, however, the large amount of heat generated during charging at fast charging stations has proven to be an obstacle. With its high-pressure heat exchanger, BENTELER now offers an innovative solution for particularly effective and fast cooling.

Innovative, compact and powerful – and no bigger than a pack of cigarettes

The outstanding feature is: The BENTELER high-pressure heat exchanger is installed in the air conditioning circuit. "Coupling battery cooling and air conditioning in this way increases the cooling power available during charging. This shortens the battery charging time," says Jens-Eike Jesau, the developer responsible. On the one hand, the battery and car interior can be optimally cooled while, on the other, the battery heat can be used to heat the passenger compartment when necessary.

The high-pressure heat exchanger from BENTELER uses CO2 as the cooling medium. The natural refrigerant with the designation R744 is liquefied before entering the cooler. There it evaporates and absorbs the waste heat from the battery charging process. Thanks to the completely sealed system, no CO2 can escape. The cooling capacity of the climate-friendly solution from BENTELER is significantly higher compared to conventional heat exchangers. We are proud to be able to offer this new solution to our e-mobility customers," says Lübbers. "It's backed up by our systems expertise as one of the leading global partners to the automotive industry."


BENTELER is a global, family-owned company serving customers in automotive technology, the energy sector and mechanical engineering. As innovative partner, we design, produce and distribute safety-relevant products, systems and services.

In the 2019 financial year, Group revenues were €7.713 billion. Under the management of the strategic holding BENTELER International AG, headquartered in Salzburg, Austria, the Group is organized into the Divisions BENTELER Automotive and BENTELER Steel/Tube. Our around 30,000 employees at 100 locations in 28 countries offer first-class manufacturing and distribution competence – all dedicated to delivering a first-class service wherever our customers need us.

BENTELER. The family of driven professionals. Since 1876.

About BENTELER Automotive

BENTELER Automotive is the development partner for the world´s leading automobile manufacturers. With around 26,000 employees and more than 70 plants in about 25 countries we develop tailored solutions for our customers. Our products include components and modules in the areas of chassis, body, engine and exhaust systems, as well as solutions for electric vehicles.


Press Contact:
BENTELER Automotive
Yves Ostrowski
Head of Communications/Marketing
Paderborn, Germany
Phone: +49 5254 81 30 7610 / Mobile: +49 172 5727257

Birgit Held
Vice President Corporate Communications/Marketing
Salzburg, Austria
Phone: +43 662 2283-101040 / Mobile: +43 664 8836 1890

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