This reduces the weight of the vehicle and frees up space that would have been needed for a large battery pack. The cells are cheaper to manufacture than the alternative design of cell modules that are connected into packs.
Chinese EV leader BYD recently pioneered cell-to-body (CTB) EV battery technology. CTB integrates the battery cells directly into the vehicle’s structure rather than housing them in a traditional battery pack.
One, popular in laptops, uses lithium cobalt oxide, which produces relatively light but expensive batteries. Others, popular in many cars, use a mix of nickel and cobalt with aluminium or manganese as a stabilizer (NCA and NCM).
Tesla uses a similar technology, Cell-to-Chassis (CTC.) Incorporating battery cells directly into the car’s structure using a battery chassis significantly reduces the vehicle’s overall weight. It creates additional space that bulky battery packs would otherwise occupy.
In 2022, BYD Auto launched its groundbreaking cell-to-body technology, setting a new standard in battery pack design and system-level integration for the next generation of electric vehicles, by integrating battery systems directly into the vehicle’s structure.
A common concern is the distance or range they can travel on a single charge. One way of improving this is to install a larger battery – but that adds weight to the vehicle, which necessitates larger brakes, and overall could make the car more cumbersome. That’s where cell-to-body technology comes in.
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