Battery pack and method for producing same

A battery pack comprising

• a battery device having a cathode, an anode and a polymer electrolyte, with a terminal being taken out from each of the cathode and the anode;
• a first packaging member having a housing recess for accommodating the battery device therein, and a connecting piece around the housing recess;
• a second packaging member having at least a first area for covering up a first surface, exposed to outside, of the battery device accommodated in the housing recess, and a second area for covering up a second surface of the battery device opposite to the first surface;
• a frame mounted around the battery device, accommodated in the housing recess and covered up by and bonded to the first area;
• and
• a connection substrate mounted on the frame, and including a terminal unit for electrical connection to an external apparatus, the terminal unit being connected to the terminals;
• wherein
• the battery device is accommodated in the housing recess of the first packaging member, a first surface of the battery device, exposed to outside, is covered up by the first area of the second packaging member, the connecting piece is bonded to the first area;
• the terminals of the battery device, accommodated in the housing recess, and covered up by and bonded to the first area are connected to the connection substrate, the frame is mounted around the battery device, the connection substrate is mounted on the frame;
• the second area of the second packaging member is folded against the first area thereof to cover up a second surface opposite to the first surface of the battery device, accommodated in the housing recess of the first packaging member and covered up by the first area, with the second area;
• and wherein
• the first packaging member is bonded to the second area of the second packaging member.