| 摘要 |
PURPOSE:To enable any leakage of electrolyte to be securely prevented inside an extremely limited volume, without deteriorating the effective generation volume, by providing a chromium-oxide layer on only a necessary part of the surface of a current-collecting lead. CONSTITUTION:A part of a current-collecting lead 4 which is not coated with a plating layer 7, that is, only the surface of an intermediate part 4c, is oxidized to make a chromium-oxide layer 8. Next, the current-collecting lead 4 only the intermediate part 4c of which is coated with the chromium oxide layer 8, after being made to penetrate through the hole of a battery case 1, is fused insulatedly from the case 1 by means of a sealing member 3 made of glass or ceramics. As a result, since the chromium oxide layer 8 is provided only on the joined interface between the sealing member 3 and the oxide layer 8, the liquid-leakage resistant performance of a sealed battery is greatly increased owing to the oxide layer 8. |
