Infineon Enables Innovative Solution for Second Life of Electric Passenger Car Batteries

­STABL Energy GmbH uses MOSFETs from Infineon Technologies AG to make stationary energy storage systems from retired electric passenger car batteries. The first pilot systems have already been put into operation in Germany and Switzerland. The special advantage of the STABL solution: It can connect discarded batteries with different residual capacities to the public power grid, even in larger quantities, without a central inverter.

"STABL Energy's innovative energy storage solution impressively demonstrates how microelectronics is contributing to the energy transition and to climate protection, and how we are making the fast-growing topic of electromobility even more sustainable in the long term," said Adam White, President of Infineon's Power & Sensor Systems (PSS) Division. "Miniaturization makes smarter systems possible for greater energy efficiency. Increasing miniaturization is a necessary prerequisite for advancing decarbonization and quality of life."

"We can use MOSFETs from Infineon to integrate power electronics and batteries with one another. In this way, we are developing more flexible and safer solutions for connecting energy storage systems to the public power grid. We are taking a technological innovation leap for the second-life use of electric passenger car batteries," says Dr. Arthur Singer, founder and co-CEO of STABL Energy. "Compared to conventional systems, this reduces loss by up to 70 percent and cuts both operating costs and CO 2 emissions by up to 40 percent per year."

Now that STABL's first storage units have passed CE and grid connection standards for Germany and have been connected to the grid in Germany, a first unit in Switzerland has also been connected. Here, 27 discarded KIA batteries with a nominal capacity of 98 kWh serve a residential neighborhood as temporary storage for solar energy.

The basic electronic components used are 100V OptiMOS™ 5 MOSFETs from Infineon. STABL Energy chose Infineon because of the low on-resistance, as well as high thermal performance and product reliability. The young company is thus giving car batteries a second life after their capacity has declined in their initial use for electromobility and they have been discarded. Used batteries can thus continue to be used in the longer term and form an important building block as intermediate storage for a green power supply.     

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