Battery connecting body and power supply device

1. A battery connecting body comprising:

a plurality of connecting members that each connect electrodes of adjacent ones of a plurality of batteries arranged such that the electrodes thereof are arranged on a straight line to electrically connect the plurality of batteries; and

a casing that houses the plurality of connecting members, wherein

the casing includes a plurality of connecting member housing portions that each house each of the connecting members and cover portions that each cover an opening of each of the connecting member housing portions, and

the cover portions are each retained by protruding portions inside of the cover portions inserted into the connecting members wherein at least one of the connecting members is a bus bar.

2. The battery connecting body according to claim 1 , wherein

a protruding portion, of the protruding portions, is formed so as to protrude toward the connecting member, and

the connecting member has a locking portion for locking the protruding portion.

3. The battery connecting body according to claim 2 , wherein

the cover portion has a pair of arms as the protruding portion, and

each of the connecting members has a pair of contact portions that contact the electrodes of the adjacent batteries, and the locking portion that is disposed between the pair of contact portions and detachably locks the pair of arms.

4. The battery connecting body according to claim 3 , wherein

the connecting member housing portion has a bottom wall on which the connecting member is placed, and

the connecting member has a stepped portion formed between the pair of contact portions and the locking portion so that the locking portion is disposed at a side further away from the bottom wall than the pair of contact portions in a state where the connecting member is housed in the connecting member housing portion.

5. The battery connecting body according to claim 3 , wherein

the connecting member housing portion has a bottom wall on which the connecting member is placed, and

the cover portion has a press portion that is formed so as to protrude in the same direction as the pair of arms and presses the connecting member toward the bottom wall of the connecting member housing portion.

6. The battery connecting body according to claim 4 , wherein

the connecting member housing portion has a bottom wall on which the connecting member is placed, and

the cover portion has a press portion that is formed so as to protrude in the same direction as the pair of arms and presses the connecting member toward the bottom wall of the connecting member housing portion.

7. A power supply device comprising:

a battery assembly including a plurality of batteries in which positive and negative electrodes are overlapped mutually in reverse; and

a battery connecting body as claimed in claim 1 , wherein

the connecting member is fixed to the electrodes of the batteries.

8. A power supply device comprising:

a battery assembly including a plurality of batteries in which positive and negative electrodes are overlapped mutually in reverse; and

a battery connecting body as claimed in claim 2 , wherein

the connecting member is fixed to the electrodes of the batteries.

9. A power supply device comprising:

a battery assembly including a plurality of batteries in which positive and negative electrodes are overlapped mutually in reverse; and

a battery connecting body as claimed in claim 3 , wherein

the connecting member is fixed to the electrodes of the batteries.

10. A power supply device comprising:

a battery assembly including a plurality of batteries in which positive and negative electrodes are overlapped mutually in reverse; and

a battery connecting body as claimed in claim 4 , wherein

the connecting member is fixed to the electrodes of the batteries.

11. A power supply device comprising:

a battery assembly including a plurality of batteries in which positive and negative electrodes are overlapped mutually in reverse; and

a battery connecting body as claimed in claim 5 , wherein

the connecting member is fixed to the electrodes of the batteries.

12. A power supply device comprising:

a battery assembly including a plurality of batteries in which positive and negative electrodes are overlapped mutually in reverse; and

a battery connecting body as claimed in claim 6 , wherein

the connecting member is fixed to the electrodes of the batteries.

13. The battery connecting body according to claim 1 , wherein the bus bar comprises:

a plurality of arms, each comprising one of a plurality of holes configured to receive ones of the electrodes;

a locking portion arranged between the plurality of arms and raised from the plurality of arms by a plurality of stepped portions of the bus bar,

wherein the locking portion comprises at least one insertion hole through which at least one of the protruding portions of the cover portions is inserted, and

wherein the locking portion further comprises a locking projection within the at least one insertion hole, the locking projection locked to the at least one of the protruding portions.

14. The battery connecting body according to claim 13 , wherein the locking projection projects through an opening of the at least one of the protruding portions, and

wherein the locking projection is within the insertion hole and projects through the opening in a direction perpendicular to a direction in which the at least one of the protruding portions is inserted into the at least one insertion hole.