| 摘要 |
PROBLEM TO BE SOLVED: To deal with up-sizing of a prismatic battery can, by increasing the effective volume without causing any canning.SOLUTION: Rectangular prisms 3a, 3b of the same shape, each made of a steel sheet having nickel plating layer formed on both sides and having two open adjoining surfaces, are joined while superposing the openings 31a, 31b of the same shape so that the other openings 32a, 32b are continuous. Consequently, a first linear joint 21 leading to the lower ends of the sidewalls 12, 13 facing each other is formed on the bottom 11, and second and third linear joints 22, 23 connected with the first linear joint 21 and leading to the upper ends of respective sidewalls are formed on the sidewalls 12, 13, in a prismatic battery can C having an upper surface opening 14. |
