Abstract: A secondary battery includes an outer package member, a battery device, an electrode terminal, and an adhesive member. The battery device is contained inside the outer package member. The electrode terminal is disposed on an outer side of the outer package member. The adhesive member has an insulating property and is disposed between the electrode terminal and the outer package member. The outer package member includes a container part and a cover part. The container part has an opening and contains the battery device inside. The cover part closes the opening and is joined to the container part. A portion or all of a peripheral end part of the electrode terminal is adhered to the cover part via the adhesive member. The electrode terminal has a thickness greater than a thickness of the cover part.

Abstract: A battery is provided. The battery includes an electrode body having a winding structure. The electrode body includes a first electrode having a first belt shape, a second electrode having a second belt shape, and a separator having a third belt shape, and an electrolyte. The separator is provided between the first electrode and the second electrode.

Abstract: A battery includes an electrode body having a winding structure, and an electrolyte solution. The electrode body and the electrolyte solution are accommodated in a case. The electrode body includes: a positive electrode that includes a positive electrode lead, and has a belt shape; a negative electrode that includes a negative electrode lead, and has the belt shape; and a separator that is provided between the positive electrode and the negative electrode, and has the belt shape. The positive electrode lead and the negative electrode lead are led out from a first end face of the electrode body. The electrode body includes a molded part of the separator, and the molded part protrudes from a second end face.