Metering schemes for reducing thermal spread in a battery pack

摘要

A battery pack assembly comprising a plurality of battery packs each including a plurality of cells and at least one metering plate for metering the quantity of air flowing respectively through each of the air paths of the battery packs. An inlet metering plate is disposed upstream of the battery packs to meter the uneven flow of cooling air generated by the inlet manifold. The inlet metering plate utilizes a plurality of apertures, which can vary in size and shape, to produce equal streams of cooling air to cool all the battery packs to a substantially uniform temperature. An outlet metering plate can be disposed downstream of the battery packs to meter the flow of outgoing cooling air through the channels of the upper cylindrical sections to produce equal air flow around all of the cells in a stack to cool all of the cells to a substantially uniform temperature.