Battery and a method of manufacturing same
A battery having a single cell, an outer paper package covering the single cell, and a water-repellent layer included in the outer paper package.
1. A method of manufacturing a battery, comprising the steps of:
partially applying an adhesive on an inner surface of a paper sheet having an outer surface;
covering a circumferential surface of a single cell with said paper sheet and bonding said single cell and the inner surface through the adhesive;
drying the adhesive;
applying a water-repellent agent on the outer surface of said paper sheet so that said paper sheet will not be impregnated with the water-repellant agent along its entire thickness and said paper sheet will have a water-absorbing layer left at the inner surface after said drying step; and
drying the water-repellant agent applied on the outer surface of said paper sheet, wherein
said applying is by rolling said single cell covered with said paper sheet on a porous material containing the water-repellant agent.
2. The method of manufacturing a battery according to claim 1 , wherein said water-repellent agent is a silicone water-repellent agent.
3. The method of manufacturing a battery according to claim 1 , wherein said adhesive contains water as a solvent before said drying step.
4. The method of manufacturing a battery according to claim 1 , wherein said single cell is a nickel-hydrogen storage cell.