Abstract: The present invention relates to a sealed one-piece battery having an alkaline electrolyte and comprising a container made of at least two mutually-cooperating parts suitable for being bonded together by contact heat-fusion and made of a thermoplastic material comprising an alloy of at least two polymers, including not less than 50% of a first polymer selected from polyamide 6 and polyamide 6--6; and not more than 50% of a second polymer selected from polyethylene, polypropylene, and copolymers thereof; said material having permeability to hydrogen no greater than 400 cm.sup.3 /m.sup.2 0.24 h.

Abstract: An electrical interconnection system for electrochemical generators including electrodes and connection members providing continuity of electrical current flow from the electrodes to the exterior of said generators connects the electrodes to the connection members and the connection members to each other by means of a mechanical and electrical joint. In an area in which there is initially a substantially plane contact surface between the parts to be joined, the joint is in the form of a plastic deformation of the parts to be joined and is situated at a sufficient distance from the edges of the parts for the edges not to be deformed. The plastic deformation consists in cold flow of the material of the parts in parallel directions in the same sense which immobilizes the parts relative to each other, only the parts contributing to the joint and being in intimate contact throughout the area subject to deformation.

Abstract: A storage cell battery unit equipped with a cooling device that uses a circulating fluid, said battery including a housing made of plastic and constituted by a case (6) and a cover (7) heat-sealed thereon, said storage cell battery being characterized by the fact that said cooling device includes two panels (12, 13) made of plastic and heat-sealed in fluid-tight manner to respective ones of two opposite walls (3, 2) of said housing, each of the panels cooperating with the corresponding wall to delimit a circulation compartment having an inlet orifice (14) and an outlet orifice (14) for said fluid at the top of the compartment.

Abstract: A storage cell battery unit equipped with a cooling device that uses a circulating fluid, said battery including a housing made of plastic and constituted by a case (6) and a cover (7) heat-sealed thereon, said storage cell battery being characterized by the fact that said cooling device includes two panels (12, 13) made of plastic and heat-sealed in fluid-tight manner to respective ones of two opposite walls (3, 2) of said housing, each of the panels cooperating with the corresponding wall to delimit a circulation compartment having an inlet orifice (14) and an outlet orifice (14) for said fluid at the top of the compartment.