Battery pack cooling system

摘要

A battery pack (1) apparatus is configured with a battery pack (5) composed of a plurality of rechargeable batteries (2) arranged in parallel with cooling medium passages (3) formed therebetween, and a cross flow fan (11) which faces a distribution space (18) formed adjacent to one side of the battery pack (5) to supply or discharge cooling medium with respect to each of the cooling medium passages (3), and which is disposed such that the rotational axis thereof follows the aligning direction of the rechargeable batteries (2). The axial position of the fan (11) is eccentric in the direction of movement of an impeller (13) at an intake chamber side with respect to a center line of the distribution space (18), the line perpendicular to the aligning direction of the rechargeable batteries. The length of a stabilizer of the fan is from 1.5 to 5 times the size of a gap between an extremity of the stabilizer and the outer circumference of the impeller, and an intake chamber wall doubles as an air discharge passage wall or is adjacent to an air discharge passage wall. The rechargeable batteries (2) are uniformly cooled within a compact configuration.