| 摘要 |
PROBLEM TO BE SOLVED: To provide a bipolar type lithium ion secondary battery with high capacity, compact size, and high insulation. SOLUTION: A positive active material is formed on a positive current collecting foil and a negative active material is formed on a negative current collecting foil. The positive active material and the negative active material are faced through a separator, then they are spirally wound to form a battery constitution body 26. The same other battery constitution body 26 is wound on the outside of the battery constitution body 26 through an insulating container 28, and the specified numbers of battery constitution bodies 26a-26d are wound in the same way, then electrically connected in series from the inside battery constitution body 26 to the outside other battery constitution body 26 to obtain this bipolar type lithium ion secondary battery. |
