The aim is to have a leading position in 48-volt batteries for the growing electric mobility segment.

Bosch and Contemporary Amperex Technology Co. Limited (CATL) have concluded a long-term strategic cooperation agreement. The partners are going to jointly specify high-performance battery cells. CATL will then design, develop, and manufacture these cells in accordance with Bosch requirements.

The cells are to be used in the 48-volt battery developed by Bosch. This battery is the core element of hybrid powertrain systems, whose efficiency is making them globally ever more important. In joining this alliance, the supplier of technology and services is also securing its long-term sourcing for battery cells.

“We have to understand battery cells, butwe do not have to make them ourselves,” says Dr. Stefan Hartung, member of theboard of management and chairman of the Mobility Solutions business sector.“With CATL, we have brought an established cell specialist for lithium-ionbatteries on board as a partner. In combination with our systems know-how andexpertise in battery management, we will extend our strong position in the48-volt battery market.”

CATL, one of the world’s leading experts oflithium-ion battery is currently building a battery factory in Erfurt, Germany.For Bosch, this alliance is another step on the path to market leadership inelectromobility. Numerous global automakers already use Bosch’s 48-voltbattery.

Destined to be the minimum standard in tomorrow’s automotive market

Bosch’s portfolio for 48-volt systems extends beyond the 48-volt battery to encompass other system components such asDC/DC converters and electrical machines. With this technology, Bosch aims to gear up all classes of vehicles for future emissions requirements and offer affordable hybridization.

Its 48-volt electrification augments the combustion engine with an electric motor. This motor is powered by the 48-volt battery, which in turn is charged by recovering energy expended during braking.This can cut fuel consumption by as much as 15 percent. If we want to improve efficiency, we can no longer afford to let brake energy dissipate unused,”Hartung says.

The market for 48-volt solutions is growing worldwide. Bosch expects that by 2025, nearly 20 percent of new cars sold annually around the globe will have this system and matching battery on board. Demand for this systems is rising, especially in Europe and China.

Cost-effectiveand easy to integrate – the Bosch 48-volt battery

The Bosch plant in Wuxi, China, startedmaking the first generation of the 48-volt battery late last year. The USP ofthe latest version of this product is that the battery is compact and cooledpassively. This means automakers can simply integrate it into their vehiclemodels, and do not require any additional cooling units. In addition, they candispense with the long and costly effort of proprietary engineering work. “Weare confident that our 48-volt battery will achieve a leading position in themarket, and make the 48-volt hybrid affordable for the mass market,” Hartungsays.