BATTERY UNIT

摘要

PROBLEM TO BE SOLVED: To provide a configuration such that the downsizing of a battery unit having a flat-type battery and a substrate is achieved while securing electrical connection between the flat-type battery and the substrate by applying various measures to a connection structure between the battery and the substrate.

SOLUTION: A battery unit (1) includes: a flat-type battery (2) having a bottomed cylindrical positive electrode can (10) (outer can) and a bottomed cylindrical negative electrode can (20) (sealing can) covering an opening side of the positive electrode can (10); a circuit board (61) (substrate) which is fixed to a plane part (21) of the negative electrode can (20) and on which a circuit component (62) is mounted; and battery-side positive electrode terminals (82) (connection members) which are disposed between the flat-type battery (2) and the circuit board (61) and electrically connect the flat-type battery (2) and the circuit board (61). The battery-side positive electrode terminals (82) can be elastically deformed in the lamination direction of the flat-type battery (2) and the circuit board (61).

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