Energy storage apparatus

1. An energy storage apparatus, comprising:

energy storage devices, each energy storage device including a side surface and a bottom surface; and

an outer housing that houses the energy storage devices,

wherein the outer housing comprises a bottom surface opposed to the bottom surface of at least one energy storage device of the energy storage devices and an attachment portion for attaching a partition plate adjacently to the side surface of the at least one energy storage device,

wherein the attachment portion includes a partition portion that extends from the bottom surface of the outer housing and is disposed as to be opposed to the side surface of the at least one energy storage device,

wherein the outer housing comprises an opening in a surface other than the bottom surface from which the partition portion extends, and

wherein the opening is provided corresponding to a position of the attachment portion such that a flow of air passes between the energy storage devices.

2. The energy storage apparatus according to claim 1 , wherein the outer housing is configured such that the partition plate is to be disposed on an extension line of the partition portion.

3. The energy storage apparatus according to claim 2 , wherein the partition portion is continuously formed on the bottom surface and extends from a first side wall of the outer housing to a second side wall of the outer housing, the first and second side walls being opposite from each other and each being continuously formed on the bottom surface and intersecting the bottom surface.

4. The energy storage apparatus according to claim 2 , wherein the partition portion comprises, at its tip end, a fitting portion for fitting an end portion of the partition plate.

5. The energy storage apparatus according to claim 2 , wherein the partition portion comprises a material different from a material of the partition plate.

6. The energy storage apparatus according to claim 2 , wherein the outer housing includes a first side wall and a second side wall that are opposite from each other and extend from the bottom surface of the outer housing, and

wherein protrusions are provided on the partition portion with an interval in a direction intersecting the first side wall and the second side wall.

7. The energy storage apparatus according to claim 1 , wherein the partition plate is detachably attached to the attachment portion.

8. The energy storage apparatus according to claim 1 , wherein the partition plate comprises an insulating member.

9. The energy storage apparatus according to claim 1 , wherein the at least one energy storage device comprises a plurality of energy storage devices that are arranged in a line, and

wherein the attachment portion is formed between the energy storage devices such that the partition plate is attachable to the attachment portion.

10. The energy storage apparatus according to claim 9 , wherein the partition plate includes a recessed section at a first end portion of the partition plate, and

wherein the partition portion comprises a protruding section that is engageable with the recessed section, the protruding section being formed in the partition portion.

11. The energy storage apparatus according to claim 10 , wherein the attachment portion comprises a support portion in a position where at least one surface of the partition plate in a vicinity of a second end portion of the partition plate is abuttable.

12. The energy storage apparatus according to claim 11 , wherein the support portion includes a groove for fitting an end portion of the partition plate.

13. The energy storage apparatus according to claim 1 , further comprising an abutment member abutting the at least one energy storage device,

wherein an end portion of the partition plate abuts the abutment member.

14. The energy storage apparatus according to claim 1 , wherein the side surface of the at least one energy storage device includes a long side surface of a rectangular, tubular metal chassis main body.

15. An energy storage apparatus, comprising:

energy storage devices arranged side by side, each energy storage device including a side surface; and

an outer housing that houses the energy storage devices,

wherein the outer housing comprises a bottom surface, a side wall that extends vertically from the bottom surface, and an attachment portion for attaching a partition plate adjacently to the side surfaces of adjacent energy storage devices of the energy storage devices,

wherein the attachment portion includes a partition portion that extends from the bottom surface and is disposed adjacently to the side surfaces of the adjacent energy storage devices of the energy storage devices,

wherein the side wall includes an opening through which a gap defined between the side surfaces of the adjacent energy storage devices of the energy storage devices is exposed,

wherein a side surface of the partition portion includes protrusions that abut the side surfaces of the adjacent energy storage devices of the energy storage devices, and

wherein the opening is provided corresponding to a position of the attachment portion such that a flow of air passes between the energy storage devices.

16. The energy storage apparatus according to claim 15 , wherein the partition plate is detachably attached to the attachment portion and is exposed through the opening.

17. The energy storage apparatus according to claim 15 , wherein the protrusions extend vertically on the side surface of the partition portion from a bottom surface of the partition portion to a top surface of the partition portion.

18. The energy storage apparatus according to claim 15 , wherein the protrusions further protrude from another side surface of the partition portion that opposes the side surface of the partition portion.

19. The energy storage apparatus according to claim 15 , wherein the opening extends in the side wall in the stacking direction of the energy storage devices.