The utility model provides a battery pack, which comprises a shell, a battery module, a cooling unit and an elastic porous unit, the battery module, the cooling unit and the elastic porous unit are arranged in the shell, the cooling unit is in thermal contact with the battery module, the elastic porous unit is arranged between the cooling unit and the shell and isolates the cooling unit from the shell, and the elastic porous unit is filled with insulating oil. By using the battery pack provided by the utility model, dangerous accidents such as short circuit and the like caused by contact between condensation generated on the cooling unit and the shell can be effectively prevented, and the safety of the battery is improved.