Patent ID: 7695856

Claim:
A battery comprising: a power generation element including a cathode electrode plate, an anodic electrode plate, a separator and an electrolyte, wherein the cathode electrode plate, the anodic electrode plate and the separator are stacked to form an electrode stack; a casing housing the power generation element and including a metal layer and a sealing portion, said casing comprising an upper casing layer and lower casing layer, wherein said sealing portion is an area where said upper casing layer is adhered to said lower casing layer; a terminal configured to transmit an electric power, the terminal being connected to the power generation element and led out of the casing through the sealing portion; a film between the terminal and the casing, the film including a resin film covering and adhering to the whole of an inner surface of the sealing portion and a sealing film wrapped around the terminal and adhering to both the terminal and the resin film, wherein the sealing film is flush with the casing at an end of the casing where the terminal exits the battery, the sealing film extends from the end of the casing to an end of the sealing portion facing the stacked electrodes, and the sealing film is flush with the end of the sealing portion facing the electrode stack.