Abstract: A method for managing an electric or hybrid vehicle including at least one rechargeable electrical energy storage module, each storage module being arranged in order to: provide a high-voltage electrical supply signal for the drive of the vehicle, and be maintained at a temperature, called operating temperature, by a heating apparatus; said method including, before a prolonged period of non-use of the vehicle, a phase, called winterizing phase, including a step of cooling each storage module in order to reach a predetermined temperature, lower than the operating temperature. A system and a vehicle implementing such a method are also provided.