Assembled battery

1. An assembled battery, comprising:

a case in which a plurality of electric cells are accommodated, each of the electric cells having a flat rectangular parallelepiped shape; and

an abutment member which abuts against top portions of the electric cells accommodated in the case to position the electric cells with respect to the case,

wherein the abutment member includes a projection inserted into a first gap defined by the case and mutually adjacent electric cells to align the abutment member, and

wherein the projection is tapered from its proximal end toward its distal end.

2. The assembled battery according to claim 1 , wherein the plurality of electric cells are arrayed in line so that long sides of the electric cells, as viewed from above, are opposed to each other.

3. The assembled battery according to claim 1 , wherein the abutment member abuts against a surface of the electric cells from which a pair of terminals projects.

4. The assembled battery according to claim 1 , wherein the abutment member includes a body which abuts against the electric cells and a rib which projects from the body so as to be inserted into the case.

5. The assembled battery according to claim 4 , wherein a distance from the body to the distal end of the projection is longer than a distance from the body to a distal end of the rib.

6. The assembled battery according to claim 4 , wherein a gap is provided between the projection and the rib.

7. The assembled battery according to claim 1 , wherein, as viewed from a direction in which the projection is inserted, one of the electric cells is provided at its corner portion with an arc portion on a side of a sidewall of the case and a straight portion connected to the arc portion.

8. The assembled battery according to claim 7 , wherein the proximal end of the projection inserted into the first gap is located closer to the sidewall than a connected portion between the arc portion and the straight portion.

9. The assembled battery according to claim 8 , wherein said one of the electric cells extends in a direction away from the sidewall.

10. The assembled battery according to claim 1 , wherein the case includes an angle portion formed on a connected portion between two sidewalls.

11. The assembled battery according to claim 10 , wherein the abutment member includes another projection inserted between a second gap defined by the angle portion and the electric cells so that the abutment member is aligned with respect to an opening of the case.

12. An assembled battery, comprising:

a case in which a plurality of electric cells are accommodated; and

an abutment member which abuts against the electric cells accommodated in the case to position the electric cells with respect to the case,

wherein the abutment member includes a projection inserted into a first gap defined by the case and mutually adjacent electric cells to align the abutment member,

wherein the abutment member includes a body which abuts against the electric cells and a rib which projects from the body so as to be inserted into the case, and

wherein a length from the body to a distal end of the projection is longer than a length from the body to a distal end of the rib.

13. The assembled battery according to claim 12 , wherein a gap is provided between the projection and the rib.

14. The assembled battery according to claim 12 , wherein the case includes a sidewall which surrounds the plurality of electric cells,

wherein the rib includes a main rib which projects from the body so as to be inserted between the electric cells and the sidewall, and

wherein the projection projects from a distal end of the main rib.

15. The assembled battery according to claim 14 , wherein the projection includes a pair of first inclined surfaces, a distance between the first inclined surfaces in an arraying direction of the mutually adjacent electric cells being gradually reduced from a proximal end toward the distal end.

16. The assembled battery according to claim 15 , wherein, as viewed from a direction in which the projection is inserted, one of the electric cells is provided at its corner portion with an arc portion on a side of the sidewall and a straight portion connected to the arc portion and extending in a direction away from the sidewall, and

wherein the proximal end of the projection inserted into the first gap is located closer to the sidewall than a connected portion between the arc portion and the straight portion.

17. The assembled battery according to claim 15 , wherein the rib includes a partition rib inserted between the mutually adjacent electric cells, and

wherein the projection is provided at a position of the main rib corresponding to an end of the partition rib.

18. The assembled battery according to claim 17 , wherein the projection includes a second inclined surface which is provided on an extension line of the partition rib and gradually approaches the main rib from the proximal end toward the distal end.

19. An assembled battery, comprising:

a case in which a plurality of electric cells are accommodated; and

an abutment member which abuts against the electric cells accommodated in the case to position the electric cells with respect to the case,

wherein the abutment member includes a first projection inserted into a first gap defined by the case and mutually adjacent electric cells to align the abutment member,

wherein the case includes an angle portion formed on a connected portion between two sidewalls, and

wherein the abutment member includes a second projection inserted between a second gap defined by the angle portion and the electric cells so that the abutment member is aligned with respect to an opening of the case.