Patent ID: 7704638

Claim:
A battery comprising: a battery case made of rigid plastic and having an accommodating space; a power-generating element disposed in the accommodating space of the battery case, the power-generating element comprising a positive electrode, a negative electrode, and an electrolyte; current collectors respectively connected to the positive electrode and the negative electrode of the power-generating element, the current collectors disposed spaced apart and extending outward from an opening portion of the battery case; an outer cover air-tightly and liquid-tightly enclosing an entirety of the battery case in which the power-generating element is disposed, the outer cover being a laminate of a flexible material including a metal layer; and sealing members disposed and melt-bonded so as to cover the opening portion of the battery case and sandwich the current collectors from both sides, whereby the opening portion of the battery case is sealed; and wherein the sealing members are melt-bonded to the peripheral edge of the opening portion of the battery case and to the current collectors more firmly than the sealing members are melt-bonded to each other, and the outer cover is sealed at at least a location corresponding to the opening portion of the battery case.