This disclosure relates to an electrified vehicle configured to selectively deactivate a restricted power mode based on an acceleration request, such as an imminent or current acceleration request. A corresponding method is also disclosed. An example electrified vehicle includes a battery and a controller configured to apply a restricted power mode when a state of health of the battery is below a predefined lower threshold. Further, when in the restricted power mode, the controller is configured to limit an amount of power drawn from the battery. Additionally, the controller is configured to selectively deactivate the restricted power mode in response to a signal indicating a current or imminent request for acceleration of the electrified vehicle requiring power to be drawn from the battery above an upper limit of the restricted power mode.

A method for determining an electric energy storage system state-of-power value. The method includes for each battery unit in the electric energy storage system, determining the battery unit state-of-power value, the battery unit state-of-power value being indicative of the maximum amount of electric load that the battery unit can deliver or receive at a constant load level during the predetermined future time range without violating electro-thermal limits of the battery unit, for each battery unit in the electric energy storage system, obtaining a battery unit measured load value indicative of the electric load actually imparted on the battery unit at a certain time instant, on the basis of the battery unit measured load value for each battery unit in the electric energy storage system, determining a load distribution amongst the battery units of the electric energy storage system, and determining the electric energy storage system state-of-power value on the basis of the battery unit state-of-power values and on the load distribution.

Discussed is a battery system including a battery; a first main relay connected between one electrode and a first output terminal of the battery; a pre-charge relay connected to the first main relay in parallel; a second main relay connected between another electrode and a second output terminal of the battery; and a battery management system controlling charging and discharging of the battery, and controlling the first main relay, the pre-charge relay, and the second main relay, wherein the battery management system opens the first main relay, the pre-charge relay, and the second main relay when a received power voltage is a predetermined reference voltage or less, closes the pre-charge relay and the second main relay to execute a pre-charge when the power voltage is higher than the reference voltage, and closes the first main relay after the pre-charge is completed.

Embodiments of the application provide a method for charging battery a charging and discharging device, which can ensure the safety performance of the battery. The charging and discharging device includes a first DC/DC converter, a unidirectional AC/DC converter and a control unit, where the first DC/DC converter is a unidirectional DC/DC converter, and the control unit is configured to: receive a first charging current and control the unidirectional AC/DC converter and the first DC/DC converter to charge a battery through an AC power source based on the first charging current; receive a first discharging current, and control the battery to release power based on the first discharging current; and receive a second charging current, and control the unidirectional AC/DC converter and the first DC/DC converter to charge the battery through the AC power source based on the second charging current.

The invention relates to a method for controlling and monitoring a plurality of battery cells (2) in a battery pack (5), wherein: by means of at least one recording unit (20), a dataset of state variables from each battery cell (2) is recorded and transferred to a selection unit (32); by means of the selection unit (32), individual state variables from the plurality of state variable datasets are selected, which form a virtual dataset of state variables; by means of a simulation unit (34), a model of a virtual cell (8) is created from the selected state variables; and by means of a data-processing unit (36), a limit value for a charging current (I) for charging the battery cells (2) in the battery pack (5) is calculated from the selected state variables of the virtual cell (8).

The invention relates to a method for controlling and monitoring a plurality of battery cells (2) in a battery pack (5), wherein: by means of at least one recording unit (20), a dataset of state variables from each battery cell (2) is recorded and transferred to a selection unit (32); by means of the selection unit (32), individual state variables from the plurality of state variable datasets are selected, which form a virtual dataset of state variables; by means of a simulation unit (34), a model of a virtual cell (8) is created from the selected state variables; and by means of a data-processing unit (36), a limit value for a charging current (I) for charging the battery cells (2) in the battery pack (5) is calculated from the selected state variables of the virtual cell (8).

A power feed control system includes: a first drive unit configured to include a first electrically driven device, a first inverter, a first fuel battery system, and a first voltage converter; a second drive unit configured to include a second electrically driven device, a second inverter, a second fuel battery system, and a second voltage converter; a common battery; and a control unit configured to perform control of the first inverter or/and the first voltage converter such that each current value of the first inverter and the first fuel battery system achieves a target value of a first current value that is determined on the basis of the first current value flowing between the first drive unit and the battery and a second current value flowing between the second drive unit and the battery and perform control of the second inverter or/and the second voltage converter such that each current value of the second inverter and the second fuel battery system achieves a target value of the second current value that is determined on the basis of the first current value flowing between the first drive unit and the battery and the second current value flowing between the second drive unit and the battery.

A computer is programmed to allocate a plurality of electric vehicles with associated electric machines to locations to perform tasks based on the charges of the electric vehicles and electric machines and expected energy consumptions of the electric vehicles traveling to the locations and of the electric machines performing the tasks at the locations; and in response to a sum of the charges of a first electric vehicle and the electric machines associated with the first electric vehicle being less than a sum of the expected energy consumptions of the first electric vehicle traveling to a first location and of the electric machines associated with the first electric vehicle performing the tasks at the first location, instruct a second electric vehicle to travel to a second location at which the first electric vehicle will be located.

A computer is programmed to allocate a plurality of electric vehicles with associated electric machines to locations to perform tasks based on the charges of the electric vehicles and electric machines and expected energy consumptions of the electric vehicles traveling to the locations and of the electric machines performing the tasks at the locations; and in response to a sum of the charges of a first electric vehicle and the electric machines associated with the first electric vehicle being less than a sum of the expected energy consumptions of the first electric vehicle traveling to a first location and of the electric machines associated with the first electric vehicle performing the tasks at the first location, instruct a second electric vehicle to travel to a second location at which the first electric vehicle will be located.

This disclosure provides systems, methods and apparatus for an energy storage system. In one aspect, the energy storage system includes a controller configured to connect a first capacitor system and a second capacitor system in series with an output of a battery system during a high current demand event such that the voltage of the output of the battery system is supported within the voltage constraints of the output of that battery system.