Battery pack

Abstract

The present invention provides a battery pack that can suppress contact between water droplets and the battery stack. [Solution] The battery pack 20 comprises a housing 30 having a ceiling wall 31, an upper battery stack 40A housed in an upper storage space S5 provided inside the housing 30, a fan 60 that supplies cooling air to the upper battery stack 40A, and a flow path forming section 50 provided between the ceiling wall 31 and the upper battery stack 40A and having a bottom wall portion 53 facing the ceiling wall 31, forming an air flow path S6 between the bottom wall portion 53 and the ceiling wall 31. The flow path forming section 50 has an opening 57 that connects the upper storage space S5 and the air flow path S6.

Claims

1. A housing with a ceiling and walls, A battery stack housed in a housing space provided inside the aforementioned housing, A cooling gas supply device that supplies cooling gas to the aforementioned battery stack, The device comprises a channel forming section provided between the ceiling wall and the battery stack, having a bottom wall facing the ceiling wall, and forming a gas channel between the bottom wall and the ceiling wall, The battery pack has an opening formed in the flow path forming section that connects the containment space and the gas flow path.

2. The battery stack has a plurality of battery cells arranged in a predetermined direction, The battery cell has terminals provided at its ends in the vertical direction and in the intersecting direction which is the direction that intersects the predetermined direction. The battery pack according to claim 1, wherein the flow path forming portion is provided only in a portion of the area in the intersecting direction and is provided so as to overlap with the terminal when viewed from the up and down direction.

3. The battery pack according to claim 1, wherein the upper surface of the bottom wall portion is inclined with respect to the horizontal plane.

4. The housing has an exhaust port for discharging the cooling gas used to cool the battery stack, The battery pack according to claim 1, wherein the lower surface of the bottom wall portion is inclined such that the end on the exhaust port side is located upward.

5. The aforementioned flow path forming section extends in a predetermined direction and is provided in multiple locations. The multiple flow path forming sections are provided spaced apart in the intersecting direction, with the center line of the ceiling wall in the intersecting direction being the direction that intersects the predetermined direction. Each of the aforementioned flow path forming portions has a side wall portion that defines the end of the gas flow path on the side of the center line, The battery pack according to claim 1, wherein the opening is provided in the side wall.

6. The aforementioned side wall portions are provided in pairs so as to be spaced apart in the intersecting direction, The battery pack according to claim 5, wherein at least one of the side walls is provided with the opening and is inclined to approach the other side wall as it moves downward.

7. The housing has an exhaust port for discharging the cooling gas used to cool the battery stack, The battery pack according to claim 5, wherein the side wall portion is provided with a guide portion that guides the gas that has passed through the opening toward the end on the exhaust port side in the predetermined direction.

8. The housing has an exhaust port for discharging the cooling gas used to cool the battery stack, The aforementioned side wall portions are provided in pairs so as to be spaced apart in the intersecting direction, At least one of the side walls has an inclined portion that slopes away from the other side wall as it approaches the end on the exhaust port side in the predetermined direction, The battery pack according to claim 5, wherein the opening is provided in the inclined portion.

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