BATTERY MODULE AND ELECTRIC POWER SUPPLY DEVICE

摘要

PROBLEM TO BE SOLVED: To facilitate the equalization of the temperature distribution in a flow direction of a cooling plate and equalize the temperatures of multiple battery cells thermally contacting with the cooling plate thereby reducing variations in charging and discharging amounts and lives of the respective battery cells.

SOLUTION: A battery module includes: a cooling plate 150 having a coolant passage 14 that a coolant circulates therein; and multiple battery cells coupling to a surface of the cooling plate 150 so as to conduct heat thereto. In the coolant passage 14, multiple large diameter tubes 201A decelerating the coolant and multiple small diameter tubes 202A accelerating the coolant are formed. A passage cross section area of each large diameter tube 201A is larger than a passage cross section area of each small diameter tube 202A disposed on the inflow side of the large diameter tube 201A. Further, a passage cross section area of each small diameter tube 202A is smaller than a passage cross section area of the large diameter tube 201A disposed on the inflow side of the small diameter tube 202A.

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