TRACTION BATTERY PACK THERMAL MANAGEMENT ASSEMBLY

A traction battery assembly includes a thermal exchange device of a battery pack, and battery arrays disposed adjacent the thermal exchange device. A phase change material is secured to an area of the thermal exchange device. A method of managing thermal energy within a battery pack includes, among other things, positioning battery arrays against a thermal exchange device, and securing a phase change material to the thermal exchange device. The phase change material is configured to take on thermal energy from at least one of the battery arrays.