A CHARGING SYSTEM FOR AN ENERGY STORAGE IN A VEHICLE AND A METHOD FOR CONTROLLING THE CHARGING SYSTEM

The invention relates to a charging system (100) for an energy storage (102) in a vehicle comprising: a plurality of parallelly arranged charging switch units (104a-d), each having an input terminal (106a-d) configured to be connected to a common charging port (108), and an output terminal (110a-d) configured to be connected to the energy storage, wherein each charging switch unit comprises a contactor (200) configured to control a flow of current from the charging port to the energy storage; for each charging switch unit, a measurement device (202) configured to determine a parameter indicative of a resistance in a current path through the charging switch unit, and a variable resistor (204) configured to control the resistance in the current path; and a charging control unit (116) connected to each of the charging switch units and configured to, if an estimated difference in resistance between any two of the plurality of current paths through a charging switch unit is higher than a predetermined difference threshold value, control the variable resistor of a charging switch unit in the current path having the lowest resistance to increase the resistance of that current path.