A battery system, comprising: a controller; multiple battery strings connected in parallel, wherein each battery string includes: at least one battery, a passive overcurrent protection device configured to disconnect the battery string from the battery system when an electrical current in the battery string exceeds a first threshold value, and an active overcurrent protection device configured to disconnect the battery string from the battery system upon activation by the controller; and wherein the controller is configured to activate a first active overcurrent protection device of a first battery string of the multiple battery strings at a first time, characterized in that, the controller is also configured to: activate a second active overcurrent protection device of a second battery string of the multiple battery strings at a second time different from the first time, assign different time delays to the activation of the first and second active overcurrent protection devices (46A, 46B), a time delay being representative of an amount of time the controller will delay the activation of an active overcurrent protection device after a value of current in the battery string that the overcurrent protection device is part of exceeds a threshold value, and assign different time delays to the opening of the active overcurrent protection device of each battery string of the multiple battery strings based on a location of the battery string in the battery system. a controller; multiple battery strings connected in parallel, wherein each battery string includes: at least one battery, a passive overcurrent protection device configured to disconnect the battery string from the battery system when an electrical current in the battery string exceeds a first threshold value, and an active overcurrent protection device configured to disconnect the battery string from the battery system upon activation by the controller; and at least one battery, a passive overcurrent protection device configured to disconnect the battery string from the battery system when an electrical current in the battery string exceeds a first threshold value, and an active overcurrent protection device configured to disconnect the battery string from the battery system upon activation by the controller; and wherein the controller is configured to activate a first active overcurrent protection device of a first battery string of the multiple battery strings at a first time, characterized in that, the controller is also configured to: activate a second active overcurrent protection device of a second battery string of the multiple battery strings at a second time different from the first time, assign different time delays to the activation of the first and second active overcurrent protection devices (46A, 46B), a time delay being representative of an amount of time the controller will delay the activation of an active overcurrent protection device after a value of current in the battery string that the overcurrent protection device is part of exceeds a threshold value, and assign different time delays to the opening of the active overcurrent protection device of each battery string of the multiple battery strings based on a location of the battery string in the battery system. activate a second active overcurrent protection device of a second battery string of the multiple battery strings at a second time different from the first time, assign different time delays to the activation of the first and second active overcurrent protection devices (46A, 46B), a time delay being representative of an amount of time the controller will delay the activation of an active overcurrent protection device after a value of current in the battery string that the overcurrent protection device is part of exceeds a threshold value, and assign different time delays to the opening of the active overcurrent protection device of each battery string of the multiple battery strings based on a location of the battery string in the battery system.