Abstract: A method for determining membrane humidification by determining the membrane protonic resistance of a fuel cell stack at humidified conditions, and normalizing the base resistance of the fuel cell stack against the base resistance of a reference fuel cell stack.

Abstract: A cooling module for a battery pack assembly is disclosed. The cooling module includes a frame having a plurality of legs forming an opening through a central portion of the frame, at least one of the plurality of legs including a slot formed therethrough. A cooling fin is coupled to the frame. The cooling fin includes a corrugated plate interposed between a first plate and a second plate forming a plurality of fluid flow channels between the first plate and the second plate. The cooling modules are disposed in a stack having at least one battery cell disposed between adjacent cooling modules. The battery cell is in heat transfer communication with the cooling fin of at least one cooling module, wherein the cooling fin facilitates a transfer of heat energy between the battery cell and the flow channels formed in the cooling fin.

Abstract: A method for determining membrane humidification by determining the membrane protonic resistance of a fuel cell stack at humidified conditions, and normalizing the base resistance of the fuel cell stack against the base resistance of a reference fuel cell stack.

Abstract: A molded cooling fin and frame is described. The molded cooling fin and frame includes a corrugated center cooling fin; a pair of outer cooling fins on opposite sides of the corrugated center cooling fin, each of the outer cooling fins having a ridge around an edge; and a frame covering an edge of each of the outer cooling fins, the frame sealed to the edge of each of the outer cooling fins. A battery pack including the molded cooling fin and frame and a method of making the molded cooling fin and frame are also described.

Abstract: A battery pack is described. One embodiment of the battery pack includes a pair of end frames, the end frames having a top and a bottom and a pair of sides, the end frames having a detent on at least one of the sides of the end frames to receive a clamp; a frame positioned between the pair of end frames, the frame having a top and a bottom and a pair of sides, the frame having a ridge on at least one of the sides of the frame; a plurality of battery cells positioned in the frame and the pair of end frames, the plurality of battery cells electrically connected to each other at the top of the frame; and at least one cooling fin positioned between the battery cells. Methods of repairing battery packs are also described.

Abstract: A molded cooling fin and frame is described. The molded cooling fin and frame includes a corrugated center cooling fin; a pair of outer cooling fins on opposite sides of the corrugated center cooling fin, each of the outer cooling fins having a ridge around an edge; and a frame covering an edge of each of the outer cooling fins, the frame sealed to the edge of each of the outer cooling fins. A battery pack including the molded cooling fin and frame and a method of making the molded cooling fin and frame are also described.

Abstract: A battery pack is described. One embodiment of the battery pack includes a pair of end frames, the end frames having a top and a bottom and a pair of sides, the end frames having a detent on at least one of the sides of the end frames to receive a clamp; a frame positioned between the pair of end frames, the frame having a top and a bottom and a pair of sides, the frame having a ridge on at least one of the sides of the frame; a plurality of battery cells positioned in the frame and the pair of end frames, the plurality of battery cells electrically connected to each other at the top of the frame; and at least one cooling fin positioned between the battery cells. Methods of repairing battery packs are also described.

Abstract: A cooling module for a battery pack assembly is disclosed. The cooling module includes a frame having a plurality of legs forming an opening through a central portion of the frame, at least one of the plurality of legs including a slot formed therethrough. A cooling fin is coupled to the frame. The cooling fin includes a corrugated plate interposed between a first plate and a second plate forming a plurality of fluid flow channels between the first plate and the second plate. The cooling modules are disposed in a stack having at least one battery cell disposed between adjacent cooling modules. The battery cell is in heat transfer communication with the cooling fin of at least one cooling module, wherein the cooling fin facilitates a transfer of heat energy between the battery cell and the flow channels formed in the cooling fin.