| 摘要 |
PROBLEM TO BE SOLVED: To provide a cylindrical Li-ion battery while exhibiting high capacity, high output, has superior reliability. SOLUTION: A hollow cylindrical shaft core 11 is made up of polyethylene mixed dispersedly with glass fibers as filler at the ratio of 30%. A polyethylene separator 33 is wound around the shaft core 11 with more than one turn, with the lead end thereof adhered to the shaft core 11 by an acryl-based adhesive. The adhesive area of the separator 33 in the shaft core 11 is set to be less than 40% of the surface area of the shaft core 11. With this, the retentive force with respect to the movement of the wound separator group along the longitudinal axis of the shaft core 11 is improved. Furthermore, this arrangement prevents internal short circuits due to breakage the lead strip and movement of the separator group, even upon application of vibration. |
