BMW gears up battery development: Next stop ASSB

April 20, 2021 // By Christoph Hammerschmidt
BMW gears up battery development: Next stop ASSB
BMW regards all-solid-state batteries (ASSBs) as the technology of choice for future generations of electric vehicles. For this reason, the carmaker wants to accelerate the development of such batteries. The technology is to be demonstrated in vehicles by around 2025; series production is to start at the end of the decade.

The development of a new ASSB should not only benefit BMW itself - with its activities, the company also plans to support the ramp-up of a European cell and battery value chain. The corresponding development activities are being funded by the state within the framework of two IPCEIs (Important Projects of Common European Interest).

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he aim of the development is a new class of vehicles, explained BMW CEO Oliver Zipse. “We want to significantly increase the energy density of the cells and at the same time reduce the costs of material use and production. We will also significantly reduce the use of primary material to ensure a truly 'green' battery," he said.

ASSBs, unlike lithium-ion batteries commonly used today, have a solid electrolyte. The preferred materials under discussion are polymers or ceramics. The most important advantage of solid-state batteries is a higher energy density; they can also be charged faster. Another advantage is that such batteries are supposed to be easier to recycle than today's batteries.

With this battery generation, BMW hopes to reach the level of the most modern combustion engines in terms of range and manufacturing costs. For this e-generation of BMW e-drive technology, the company is currently evaluating different cell formats, cell chemistries and also cell modules. A key objective is to design truly green, low-CO2 and recyclable batteries.


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Frank Weber, Member of the Board of Management for Development at BMW AG: "We are developing the battery cell of the future: it will be powerful, safe, cost-effective and recyclable - from the selection of materials to recyclability after use in the vehicle to recycling. All this will be created in a European value chain."

BMW is already involved in the development of "green" battery technologies. In the current generation, for example, the company's engineers succeeded in reducing

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