Electricity storage device
AssigneeSanyo Electric Co., Ltd.
InventorsHiroyuki Okuda, Seiji Omura
Life of this patent
Estimating the term…
Abstract
A battery pack includes a plurality of unit cells, each including a cylindrical battery case, and a connecting member (12) that connects the unit cells to each other. The battery case of each unit cell includes a bottom surface portion (30b) including a plurality of gas discharging sections (32) that open when an internal pressure of the unit cell reaches a predetermined pressure. The gas discharging sections (32) are separated from each other. The connecting member (12) is joined to a non-opening section (34) of the bottom surface portion (30b), the non-opening section (34) being disposed between the gas discharging sections (32).
Claims5
An electricity storage device comprising:
- a plurality of storage cells, each including a cylindrical cell case;
- and
- a connecting member that connects the storage cells to each other,
- wherein the cell case of each storage cell includes a bottom surface portion including a plurality of gas discharging sections that open when an internal pressure of the storage cell reaches a predetermined pressure, the gas discharging sections being separated from each other, and
- wherein a distal end portion of the connecting member is joined to a non-opening section of the bottom surface portion of the cell case, the non-opening section being disposed between the gas discharging sections.
The electricity storage device according to 1, wherein the bottom surface portion of the cell case includes loop-shaped grooves, and
- wherein sections surrounded by the grooves serve as the gas discharging sections.
Dependencies are inferred from the claim text.