Square secondary battery and manufacturing method thereof

A manufacturing method of a square secondary battery,

• the square secondary battery including:
• a conductive container which is formed in a rectangular parallelepiped shape opened on one surface side;
• a lid which seals the one surface side of the container;
• a charge/discharge body which is housed in the container and which has electrodes respectively formed on both sides in a width direction;
• and
• an insulating member which coats the charge/discharge body and which insulates the charge/discharge body and the container from each other,
• the insulating member being
• formed in a rectangular parallelepiped shape opened on one surface side by folding an insulation sheet formed of an insulation material, and at least one side surface among a pair of narrow-width side surfaces respectively opposing the electrodes of the charge/discharge body being folded in a direction of separation from the charge/discharge body along a height direction, and
• formed by folding an insulation sheet formed of an insulation member, and on at least one side surface among the narrow-width side surfaces respectively opposing the electrodes of the charge/discharge body in the insulation sheet, a crease for folding the narrow-width side surface in a direction of separation from the charge/discharge body is formed in a direction from the one open surface toward the bottom surface, and
• the manufacturing method of a square secondary battery comprising:
• a first step of creating the insulation sheet;
• a second step of forming the insulating member by folding the insulation sheet;
• and
• a third step of housing the charge/discharge body so as to insert the charge/discharge body into the insulating member from the open one surface side of the insulating member.

A manufacturing method of a square secondary battery,

• the square secondary battery including:
• a conductive container which is formed in a rectangular parallelepiped shape opened on one surface side;
• a lid which seals the one surface side of the container;
• a charge/discharge body which is housed in the container and which has electrodes respectively formed on both sides in a width direction;
• and
• an insulating member which coats the charge/discharge body and which insulates the charge/discharge body and the container from each other,
• the insulating member being
• formed in a rectangular parallelepiped shape opened on one surface side by folding an insulation sheet formed of an insulation material, and at least one side surface among a pair of narrow-width side surfaces respectively opposing the electrodes of the charge/discharge body being folded in a direction of separation from the charge/discharge body along a height direction, and
• formed by folding an insulation sheet formed of an insulation member, and on at least one narrow-width side surface among the side surfaces respectively opposing the electrodes of the charge/discharge body in the insulation sheet, a crease for folding the narrow-width side surface in a direction of separation from the charge/discharge body is formed in a direction from the one open surface toward the bottom surface, and
• the manufacturing method of a square secondary battery comprising:
• a first step of creating the insulation sheet;
• and
• a second step of forming the insulating member by folding the insulation sheet so as to coat the charge/discharge body.