Battery module comprising a fluid applying pressure to a cell

A module for a battery, the module comprising:

• an enclosure;
• cells arranged in the enclosure, each of the cells comprising a first main face and a second main face;
• a space formed between the first main face of a cell and the second main face of an adjacent cell and/or a space formed between one of the first and second main faces of a cell and the enclosure;
• a fluid intake means and a fluid evacuation means, the fluid occupying the space or spaces so as to cool the first main faces and/or the second main faces;
• and
• flexible walls each extending facing and in contact with, or substantially in contact with, the first main face or the second main face of a cell, and a flow rate of the fluid is driven so as to make it possible to vary a pressure of the fluid being applied to the flexible walls on the first main faces and/or on the second main faces of the cells, in order to follow a shrinkage and/or an inflation of the cells during charge/discharge cycles of the cells and/or in the course of the ageing of the cells.