Abstract: A battery module according to the present invention includes: a case body including a flat plate portion and a base portion projecting from the flat plate portion; a circuit board including a through-hole formed in a thickness direction and secured to the case body, the base portion being inserted into the through-hole; and a battery secured to and placed on the base portion, in which the battery is a flat battery with a coin shape or a button shape, and electrode plates connected to each of the positive and negative poles of the battery are connected to the circuit board to supply a power source to electronic components disposed on the circuit board.

Abstract: Provided is a battery case for accommodating a coin cell battery which is inserted thereinto in a sliding manner. The battery case includes: a battery case body part which includes an opening for accommodating the coin battery and in which the accommodated coin cell battery is held; and a lid part which closes the opening of the battery case body part. The lid part includes a claw part which, upon closing of the opening, is fitted and inserted into the battery case body part, and with which, upon removal of the coin cell battery held in the battery case body part, the coin battery is pushed out in a direction opposite to a direction of insertion.

Abstract: Provided is a battery case for accommodating a coin cell battery which is inserted thereinto in a sliding manner. The battery case includes: a battery case body part which includes an opening for accommodating the coin battery and in which the accommodated coin cell battery is held; and a lid part which closes the opening of the battery case body part. The lid part includes a claw part which, upon closing of the opening, is fitted and inserted into the battery case body part, and with which, upon removal of the coin cell battery held in the battery case body part, the coin battery is pushed out in a direction opposite to a direction of insertion.

Abstract: A battery module according to the present invention includes: a case body including a flat plate portion and a base portion projecting from the flat plate portion; a circuit board including a through-hole formed in a thickness direction and secured to the case body, the base portion being inserted into the through-hole; and a battery secured to and placed on the base portion, in which the battery is a flat battery with a coin shape or a button shape, and electrode plates connected to each of the positive and negative poles of the battery are connected to the circuit board to supply a power source to electronic components disposed on the circuit board.