Secondary or rechargeable battery e.g. lithium battery, forming expandable device for car, has assembly part assembled with battery forming unit so as to provide electrical connection between electrode and battery forming unit

摘要

The device (1) has a battery forming unit (10) comprising a battery core (11), and an external mounting (13) electrically connected to the battery core. An external side edge of the external mounting includes an assembly part i.e. projection. The assembly part comprises an electrode. The assembly part is assembled with another battery forming unit (20) so as to provide an electrical connection between the electrode and the latter battery forming unit.