Abstract: The present invention relates to a battery module consisting of battery cells and a cooling module comprising multiple tiers, the cooling module being designed to hold the battery cells, such as lithium-ion batteries. The cooling module consists of at least one first and one second side part, each side part having at least one flow channel, and of multiple substantially flat elements which extend along planes between the side parts. An internal area is formed between neighbouring flat elements, said internal areas being designed to hold the battery cells.