In order to provide a battery pack that can be produced highly efficiently and contribute to an improvement in productivity, a battery pack of the present invention includes: a plurality of unit batteries 100 that include a positive-electrode pulled-out tab 120 and a negative-electrode pulled-out tab 130 ; and a board 300 on which pulled-out tab connection sections are formed to connect the pulled-out tabs of different polarities of adjacent unit batteries 100.
1. A battery pack, comprising:
a plurality of unit batteries that include a positive-electrode pulled-out tab and a negative-electrode pulled-out tab; and
a board on which pulled-out tab connection sections are formed to connect the pulled-out tabs of different polarities of adjacent unit batteries,
wherein the positive-electrode and negative-electrode pulled-out tabs of the unit battery, which is disposed on one end portion of the board, are both bent in the same direction.
2. A battery pack, comprising:
a plurality of unit batteries that include a positive-electrode pulled-out tab and a negative-electrode pulled-out tab; and
a board on which pulled-out tab connection sections are formed to connect the pulled-out tabs of different polarities of adjacent unit batteries,
wherein the positive-electrode and negative-electrode pulled-out tabs of the unit battery, which is disposed on one end portion of the board, are both bent in the same direction, and the positive-electrode and negative-electrode pulled-out tabs of the unit battery, which is disposed on another end portion of the board, are both bent in the same direction.
3. A battery pack, comprising:
a plurality of unit batteries that include a positive-electrode pulled-out tab and a negative-electrode pulled-out tab; and
a board on which pulled-out tab connection sections are formed to connect the pulled-out tabs of different polarities of adjacent unit batteries,
wherein the positive-electrode and negative-electrode pulled-out tabs of the unit battery, whose pulled-out tabs are connected by the pulled-out tab connection section, are bent in opposite directions.
4. A battery pack, comprising:
a plurality of unit batteries that include a positive-electrode pulled-out tab and a negative-electrode pulled-out tab; and
a board on which pulled-out tab connection sections are formed to connect the pulled-out tabs of different polarities of adjacent unit batteries,
wherein a divider piece is provided between the pulled-out tab connection sections, and the height of the divider piece from the board is higher than the height of a bolt used to connect pulled-out tabs in the pulled-out tab connection section.
5. A battery pack, comprising:
a plurality of unit batteries that include a positive-electrode pulled-out tab and a negative-electrode pulled-out tab;
a board on which pulled-out tab connection sections are formed to connect the pulled-out tabs of different polarities of adjacent unit batteries; and
a holder member that is fixed to the board and includes holes into which the positive-electrode and negative-electrode pulled-out tabs of a plurality of the unit batteries are inserted.
6. The battery pack according to claim 5 , wherein
guide projecting sections are provided on the holder member in such a way that the holes are sandwiched therebetween.
7. The battery pack according to claim 6 , wherein
tapered sides are provided on the guide projecting sections.
8. The battery pack according to claim 5 , wherein:
the pulled-out tabs of different polarities of adjacent unit batteries are connected in the pulled-out tab connection section with connection members; and
a plurality of the holes are provided on the holder member, and bridging structure sections are provided between a plurality of the holes.
9. The battery pack according to claim 8 , wherein
the connection members are bolts and nuts.
10. The battery pack according to claim 9 , wherein
nut housing sections are provided in the bridging structure sections to house the nuts.
11. The battery pack according to claim 8 , wherein
a divider piece, which is disposed between the pulled-out tab connection sections, is provided in the bridging structure section.
12. The battery pack according to claim 8 , wherein
a positioning projecting section is provided in the bridging structure section and used to position the board and the holder member.
13. The battery pack according to claim 8 , wherein
a screw hole, into which a fixing screw for fixing the board to the holder member is screwed, is provided in the bridging structure section.