| 摘要 |
PROBLEM TO BE SOLVED: To adjust the number of unit cells parallely connected while using the same battery holder.SOLUTION: A battery pack comprises: entire housing sections 6 for housing unit cells 1 constituting an odd-number battery unit 8 in a first battery holder 3A and a second battery holder 3B; and partial housing sections 7 for housing some of the unit cells 1 constituting the odd-number battery unit 8. The odd number of the unit cells 1 housed in the entire housing sections 6 are parallely connected to constitute the odd-number battery unit 8. The battery holder 3A and the secondary battery holder 3B house the unit cells 1 in one partial housing section 7 with the number smaller by one than the other partial housing section 7. One partial housing section 7 is designated as a vacant housing section 4X in which the unit cells 1 are not housed, and the odd number of the unit cells 1 housed in both of the partial housing sections 7 are parallely connected to constitute the odd-number battery units 8. The battery pack serially connects plural sets of the odd-number battery units 8 constituted by the unit cells 1 housed in the first battery holder 3A and the second battery holder 3B with each other. |
