Patent ID: 8790812
Filing Date: 2014-07-29
Classification: H01M,Y02E

Abstract:
1. A battery pack comprising: multiple battery cells built-up in a layer direction and held as one unit by a binding force in the layer direction; fluid passages respectively formed between neighboring battery cells, so that cooling fluid flows through the fluid passages to cool-down the respective battery cells; multiple wall-shaped projecting portions provided on a side surface of the battery cell perpendicular to the layer direction, each of which extends in a flow direction of the cooling fluid, the multiple wall-shaped projecting portions being arranged in a direction perpendicular to the flow direction so as to form the fluid passages respectively between the neighboring battery cells; and multiple enlarged projecting portions provided at intermediate portions of each wall-shaped projecting portion extending in the flow direction, so that the enlarged projecting portions and the wall-shaped projecting portions are alternately arranged in the flow direction, the enlarged projecting portions being in contact with the neighboring battery cell to receive action force from the neighboring battery cell, wherein an outer dimension of the enlarged projecting portion in the direction in which multiple wall-shaped projecting portions are arranged is made larger than a thickness dimension of the wall-shaped projecting portion.