Shovel

A shovel comprising:

• a lower travelling body;
• an upper turning body that is pivotally mounted on the lower travelling body;
• an attachment that is arranged in the upper turning body;
• a power storage device that is arranged in the upper turning body together with the attachment;
• and
• an electric part that is driven by a discharge power from the power storage device,
• wherein the power storage device comprises:
• a housing having a first wallboard in which a first flow path for coolant's flow is formed;
• and
• a power storage module which is arranged inside the housing and includes a plurality of power storage cells which are stacked on one another and each of the power storage cells is thermally coupled to the first flow path, and
• wherein the first flow path meanders on a plane of the first wallboard, and includes a first section making a coolant flow in a first direction, a second section into which the coolant flowing through the first section enters, and a third section into which the coolant flowing through the second section enters, the second section making the entered coolant flow in a second direction opposite to the first direction, the third section making the entered coolant flow in the first direction, and each of the first section, the second section and the third section includes a plurality of auxiliary flow paths divided in a width direction;
• and
• wherein a meandering part of the first flow path overlaps the power storage module in planar view, and
• wherein the plurality of auxiliary flow paths belonging to the second section are classified into a first group and a second group, the auxiliary flow paths belonging to the first group are closer to the first section than the auxiliary flow paths belonging to the second group, the auxiliary flow paths belonging to the second group are closer to the third section than the auxiliary flow paths belonging to the first group, a gap between the auxiliary flow path belonging to the first group and the auxiliary flow path belonging to the second group is wider than both of a gap between the first section and the second section and a gap between the second section and the third section.