Abstract: A method manages an electrical energy storage battery comprising first and second branches in parallel and each having N storage elements in series. The method includes providing a non-dissipative balancing device for balancing electrical voltages at terminals of the storage elements. The device includes N+1 switching elements of a first type to electrically connect, in parallel, two storage elements belonging to first and second branches at a same stage, and 2N switching elements of a second type to electrically connect, in parallel, two storage elements belonging to first and second branches at adjacent stages. The method also includes choosing only a portion of the storage elements of the first branch, choosing only a portion of the storage elements of the second branch, and controlling the switching elements so as to electrically connect to one another, in parallel, the selected storage elements of the first and second branches.

Abstract: A method for estimating the ageing of at least one cell of a storage battery includes acquiring a voltage across the terminals of the cell and an amperage passing through the cell, and calculating a maximum capacitance and a level of charge of the cell in accordance with the voltage and the amperage acquired. The calculation is made by resolving: a system of discretized equations corresponding to a modelling of the cell as an electric circuit includes, in series, an ideal voltage source, a resistor, a first resistor and capacitor pair connected in parallel, and at least one second resistor and capacitor pair connected in parallel; and a discretized equation for estimating the variation in the maximum capacitance of the cell.

Abstract: A method manages an electrical energy storage battery comprising first and second branches in parallel and each having N storage elements in series. The method includes providing a non-dissipative balancing device for balancing electrical voltages at terminals of the storage elements. The device includes N+1 switching elements of a first type to electrically connect, in parallel, two storage elements belonging to first and second branches at a same stage, and 2N switching elements of a second type to electrically connect, in parallel, two storage elements belonging to first and second branches at adjacent stages. The method also includes choosing only a portion of the storage elements of the first branch, choosing only a portion of the storage elements of the second branch, and controlling the switching elements so as to electrically connect to one another, in parallel, the selected storage elements of the first and second branches.