Patent ID: 7972721

Claim:
A battery pack comprising: a rechargeable battery having a plate at an external surface of the battery at a first side of the battery for sealing in battery content; a circuit substrate having an external terminal portion and overcharge, undercharge and overcurrent protecting means, said substrate being arranged on an external side of the sealing plate, a gap occurring between the substrate and the sealing plate for receiving hot melt resin; said resin serving to unite the substrate with the rechargeable battery and to seal space between the substrate's external terminal portion and the battery's sealing plate, said sealing plate defining a recess which defines a trough in said sealing plate, a heat sensitive element having an active portion arranged in the trough and being elevated relative to the sealing plate with a void therebetween, another portion of the heating sensitive element being heat-coupled to the rechargeable battery, and a heat shield comprising constituent elements of the battery pack other than the resin, wherein said constituent elements of the battery pack other than the resin cover the recess so as to prevent the resin from contacting surfaces of the heat sensitive element during filling of said gap with said resin.