Micro-Channel Cooling Fin Design Based on an Equivalent Temperature Gradient

A battery module comprising

• a plurality of battery cells;
• a plurality of cooling fins interposed between battery cells in the plurality of battery cells;
• and
• a liquid coolant system for circulating liquid coolant through the cooling fins;
• wherein each cooling fin comprises a metal plate assembly defining a plurality of cooling channels therein, the metal plate assembly including:
• an inlet section that receives the coolant from the liquid coolant system and directs the coolant into the plurality of cooling channels;
• and
• an outlet section from which the coolant exits the plurality of cooling channels, a first subset of the cooling channels providing a first mass flow rate of the coolant to a first fin region of the metal plate assembly and a second subset of the cooling channels providing a second mass flow rate of the coolant to a second fin region of the metal plate assembly, the metal plate assembly positionable adjacent to a battery cell such that the first fin region is proximate to a first battery region and the second fin region is proximate to a second battery region where the first battery region has higher temperature during battery operation than the second battery region when the battery is not cooled.