| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrode terminal structure of a lithium ion secondary battery, for enhancing engaging force of an electrode terminal plate and an electrode pin and demonstrating stable electrical characteristics.SOLUTION: For the electrode terminal structure of a lithium ion secondary battery, a negative electrode pin 22 with an annular groove 26 formed on an outer periphery is press-fitted to a connection hole 21a of a negative electrode terminal plate 21, and the negative electrode terminal plate 21 and the negative electrode pin 22 are joined. By the electrode terminal structure, since an inner peripheral wall of the negative electrode terminal plate 21 plastically deformed during press-fitting flows to the annular groove 26 of the negative electrode pin 22, the engaging force of the negative electrode terminal plate 21 and the negative electrode pin 22 is increased. Thus, since secular change can be suppressed for contact resistance of the negative electrode terminal plate 21 and the negative electrode pin 22, the electrode terminal structure with excellent electrical characteristics is attained. |
