US Patent 10160344 Modular battery assembly

A modular battery assembly includes at least a first battery pack and a second battery pack. Each battery pack includes a container at least partially enclosing a first plurality of electrical storage devices, an attachment mechanism configured to removably attach the first container to a chassis of a vehicle, a mechanical connector, and an electrical connector configured to connect the plurality of electrical storage devices to a control section of the vehicle. The battery pack containers are configured to be removably attached to each other by connection of the mechanical connectors.