| 摘要 |
PROBLEM TO BE SOLVED: To reduce the temperature difference between battery cells generating heat in a power storage device using many battery cells when the battery cells are charged/discharged.SOLUTION: Cylindrical battery cell groups charged and discharged by a power storage device are arranged in rows to be adjacent to one another in a housing so that the axial directions of the battery cells 9 are parallel to one another. The housing is provided with an upstream-side passage and a downstream-side passage through which refrigerant is made to flow in a direction intersecting to the axial direction of the battery cell groups. A discharge member which contacts the battery cell groups along the peripheral surface shape of the battery cell groups and covers the battery cell groups at the downstream side is provided. A surface opposite to the surface on which the discharge member contacts the battery cell groups is a flat surface, a passage through which refrigerant flows is formed between the flat surface and the inner surface of the housing, and the passage is configured to be narrower toward the downstream side of the housing.SELECTED DRAWING: Figure 2 |
