Method and arrangement for determining a value of the state of energy of a battery in a vehicle

An arrangement in a vehicle (1;

• 1) for determining a value of the state of energy (SOE) of a rechargeable battery (5) connected to an electric consumer (4) in said vehicle (1;
• 1′);
• said arrangement comprising a control unit (6) being connected to said battery (5) and configured for determining the state of charge (SOC) as a measure of the present capacity of said battery (5) and for determining said state of energy (SOE) as an indication of at least the remaining charge and discharge energy of said battery (5);
• wherein said control unit (3) is further configured for calculating and determining said value of the state of energy (SOE) based on at least one parameter (I, R, SOCmax, SOCmin) which is related to the operation of said electric consumer (4) and where said at least one parameter (I, R, SOCmax, SOCmin) varies depending on a mode for operating said vehicle (1;
• 1) or electric consumer (4) during charging or discharging of said battery (5).