| 摘要 |
PURPOSE:To improve environmental resistance by coating the battery surface enclosed by a high polymer film with a water absorbing polymer and/or a coating material with water repellency. CONSTITUTION:Lead-out electrode terminal parts 7, 8 constituted by the corrosion resistant sheet metal of stainless or aluminum are bonded and fixed on terminal taking- out windows 3, 4. Then, a negative electrode collector 6 and positive collector 5 are stuck to high polymer films 1, 2 using an epoxy adhesive. Further, a negative electrode active material 9 of sheet metallic lithium and paste like positive electrode active material 10 are respectively stuck to the collectors 5, 6. Polypropylene-made non-woven supporting member 11 is immersed in an electrolyte, and it is arranged together with a polypropylene made separator 12 between the negative electrode active material 9 and the positive active electrode active material 10, allowing them to be assembled. And, an adhesive 14 was applied on the outer circumference part 13 of the high polymer films 1, 2, and thereafter they were heated and bonded. Then, a coating material 15 containing a water absorbing polymer was spread over the whole surface of a battery, allowing the battery to be completed. For the water absorbing polymer, methacrylate ester, and a copolymer of acrylate ester and vinyl acetate, or a polyvinyl pyrolidone series copolymer are used. |
