The batteries in today’s electric cars constitute a large part of the vehicles’ weight, without fulfilling any load-bearing function.
A structural battery, on the other hand, is one that works as both a power source and as part of the structure – for example, in a car body.
This is termed ‘massless’ energy storage, because in essence the battery’s weight vanishes when it becomes part of the load-bearing structure. Calculations show that this type of multifunctional battery could greatly reduce the weight of an electric vehicle.
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