Abstract: According to one embodiment, an electricity storage device includes a first box, a second box, a storage battery, and a flow path. The second box includes a side plate and is housed in the first box. The storage battery is disposed in the second box while being connected to the side plate. The flow path is configured to include the side plate of the second box inside the first box and outside the second box and vertically penetrates the first box.

Abstract: According to one embodiment, an electricity storage device includes a first box, a second box, a storage battery, and a flow path. The second box includes a side plate and is housed in the first box. The storage battery is disposed in the second box while being connected to the side plate. The flow path is configured to include the side plate of the second box inside the first box and outside the second box and vertically penetrates the first box.

Abstract: According to one embodiment, a liquid cooling type power conversion apparatus is provided. The liquid cooling type power conversion apparatus has a power conversion apparatus and a cooling apparatus which are provided in an engine room of a railway vehicle, an electric component and a plurality of semiconductor devices which are provided in the power conversion apparatus, a third heat exchanger located between the electric component and an electric blower, a cooling body on which the plurality of the semiconductor devices are mounted, a first heat exchanger provided in the cooling apparatus, a second heat exchanger provided in the cooling apparatus having a size smaller than the first heat exchanger 111b, a piping to connect the third heat exchanger 5 and the second heat exchanger, and a piping to connect the cooling body and the first heat exchanger.