a battery pack for a vehicle may include a cell array defining an upper surface and a housing defining a raised portion extending along and above a length of the array such that the raised portion and upper surface define a vent manifold therebetween which may be configured to collect gases generated by the array . the housing may define a discharge opening configured to allow gases to exit the manifold . a pair of end plates may be disposed at opposing ends of the array . one of the end plates may define a pass through portion in at least partial registration with the discharge opening . an outlet tube may be configured to facilitate fluid communication between the vent manifold and exterior of the vehicle . the battery pack may also include spacers located between upper edges of adjacent cells and may be configured to prevent cooling gases from entering the vent manifold .