Battery cooling element, battery module unit and method for manufacturing a battery cooling element

A battery cooling element for a traction battery, the battery cooling element comprising:

• a main body, and
• a multilayer composite film including:
• a first outwardly oriented plastic material layer, and
• a metal material layer covered by the first plastic material layer, the metal material layer to improve electromagnetic compatibility,
• wherein the main body and the multilayer composite film at least partially enclose an interior of the battery cooling element for receiving a cooling medium, the interior being connected to a cooling medium inflow and a cooling medium outflow,
• wherein the multilayer composite film is three-dimensionally shaped,
• wherein the first plastic material layer includes one or more of polyethylene (PE), polyamide (PA), or polypropylene (PP), and
• wherein the multilayer composite film has a first region to contact at least a portion of the traction battery and a second region to couple the multilayer composite film to the main body, the first region having a higher heat transfer coefficient than the second region, the second region being adjacent to the first region.