Inflatable structure for battery protection

The present invention relates to an energy storage module (300, 400) arranged in a vehicle (100), the energy storage module comprising: an energy storage cell (202) arranged in a casing (302), an inflatable element (206, 407, 506a-d, 706) arranged between the casing and the energy storage cell and to at least partly cover a surface portion (212) of the energy storage cell; and an inflating unit (208, 408) in communication with a detection unit arranged to determine a crash severity in the event of an accident for the vehicle, wherein the inflating unit is arranged to inflate the inflatable element when the crash severity exceeds a predetermined threshold.