Electrochemical cell systems with multi-chamber cooling devices, and methods of producing the same

A cooling device, comprising:

• a first plate;
• a second plate coupled to the first plate to form a first outer chamber;
• a third plate coupled to the second plate to form an inner chamber;
• a fourth plate coupled to the third plate to form a second outer chamber;
• and
• a chamber return having a curved surface, the chamber return coupled to the first plate, the second plate, the third plate, and the fourth plate and configured to direct flow of cooling fluid from the first outer chamber and the second outer chamber to the inner chamber.

A method, comprising:

• flowing a first stream of heat transfer fluid via a first flow path along a first plate and a second stream of heat transfer fluid via a second flow path along a second plate, the first plate in physical contact with a first electrochemical cell, the second plate in physical contact with a second electrochemical cell;
• converging the heat transfer fluid in the first flow path with the heat transfer fluid in the second flow to form a combined stream;
• flowing the combined stream along a common flow path;
• and
• discharging the heat transfer fluid from an outlet port fluidically coupled to the common flow path.