Traction energy storage system for a vehicle, comprising: multiple electrical energy stores, wherein each of the energy stores comprises one or more cell modules electrically connected via busbars, an energy store high-voltage interface connected or connectable to the busbars and an energy store controller controlling the cell modules, and each of the cell modules comprises multiple storage cells and a cell module controller, and wherein each of the cell module controllers is configured to output measured values relating to the storage cells in the respective cell module to the energy store controller, and each of the energy store controllers is configured to take the measured values obtained as a basis for generating signals having electrical characteristic quantities (612, 614) of the respective energy store and at least one limit value (606, 608) for a current (602, 604) through the energy store high-voltage interface of the respective energy store; and a system controller that is configured to obtain the signals and limit values (606, 608) from the energy store controllers, characterized in that the system controller is configured to take the characteristic quantities (612, 614) of all the energy stores as a basis for computing the current (602, 604) through each of the energy store high-voltage interfaces when the energy store high-voltage interfaces are connected in parallel, and to take the computed currents and the limit values (606, 608) for the currents (602, 604) as a basis for determining a system limit value (704, 706) for the sum of the currents while taking into consideration equalization currents within the traction energy storage system and to output said system limit value as a system signal. multiple electrical energy stores, wherein each of the energy stores comprises one or more cell modules electrically connected via busbars, an energy store high-voltage interface connected or connectable to the busbars and an energy store controller controlling the cell modules, and each of the cell modules comprises multiple storage cells and a cell module controller, and wherein each of the cell module controllers is configured to output measured values relating to the storage cells in the respective cell module to the energy store controller, and each of the energy store controllers is configured to take the measured values obtained as a basis for generating signals having electrical characteristic quantities (612, 614) of the respective energy store and at least one limit value (606, 608) for a current (602, 604) through the energy store high-voltage interface of the respective energy store; and a system controller that is configured to obtain the signals and limit values (606, 608) from the energy store controllers, characterized in that the system controller is configured to take the characteristic quantities (612, 614) of all the energy stores as a basis for computing the current (602, 604) through each of the energy store high-voltage interfaces when the energy store high-voltage interfaces are connected in parallel, and to take the computed currents and the limit values (606, 608) for the currents (602, 604) as a basis for determining a system limit value (704, 706) for the sum of the currents while taking into consideration equalization currents within the traction energy storage system and to output said system limit value as a system signal.