An electric locomotive includes a first control line and DC buses laid between couplers, a power storage device connected to the DC buses, and a DC/DC converter that executes charge and discharge control with respect to the power storage device. A non-powered vehicle includes DC buses connected to the DC buses via a coupler, a second control line, a power storage device connected to the DC buses via a circuit breaker, and a BMU that manages the power storage device. The DC/DC converter executes power accumulation control with respect to the power storage device and power accumulation control with respect to the power storage device. When having determined abnormality of the power storage device, the BMU controls the circuit breaker to be turned off, thereby cutting off electrical connection between the power storage device and the DC buses.

A rechargeable battery includes a plurality of interconnected battery cells which are connected to at least one pole connection of the battery by at least one circuit element such that the plurality of interconnected battery cells can be electrically decoupled from the at least one pole connection. A control circuit for monitoring and controlling the battery comprises at least one first cell monitoring device and at least one second cell monitoring device which are configured to detect operational parameters of at least one battery cell of the plurality of interconnected battery cells and to guide the operational parameters to a control device. The at least one first cell monitoring device is connected to a first control device by a first interface, and the at least one second cell monitoring device is connected to a second control device by a second interface.

Disclosed is a motor-driven vehicle including: a first and second battery; a voltage converter that includes a plurality of switching elements configured to perform voltage conversion between an electric power output path and the first and second battery, and to switch the connection of the first battery and the second battery between an in-series connection and an in-parallel connection; a motor-generator; and a control device configured to turn on and off the switching elements, in which the control device switches connection to either of connection between the electric power output path and both the first battery and the second battery, and connection between the first battery and the second battery based on the switching element temperature, and the operating point of the motor-generator.

Electric vehicles such as scooters can have a first operating mode in which energy is supplied by a single electrical energy storage device and a second operating mode in which energy is supplied by multiple electrical energy storage devices. A circuit element can be included in the circuit connecting the electrical energy storage devices to a prime mover such as a traction motor. The circuit element has a first, electrically conductive, state that couples only the single electrical energy storage device to a traction motor and a second, electrically non-conductive, state that couples the multiple electrical energy storage devices to the prime mover. The transition of the circuit element from the first state to the second state can occur by irreversibly fracturing the circuit element upon installation of multiple electrical energy storage devices or by a controller transitioning the circuit element from the first state to the second state.

The present invention relates to a method for connecting multiple battery cells (21) of a battery (11), wherein the multiple battery cells (21) can be connected in series to one another, and a single first control variable P1 and a single second control variable P2 are predefined for all the battery cells (21). In this context, in order to generate a desired output voltage of the battery (11), each battery cell (21) is electrically coupled to the battery (11) with a corresponding first probability, defined as a function of the first control variable P1, and in each case electrically decoupled from the battery (11) with a corresponding second probability, defined as a function of the second control variable P2. In addition, a value of the first control variable P1 and a value of the second control variable P2 are respectively predefined repeatedly with an update frequency which is dependent on the desired output voltage of the battery (11) which is to be generated.

The invention relates to a method for protecting a contactless charging/discharging process of a battery-operated object (4), in particular an electric vehicle, wherein the object (4) is charged or discharged by means of inductive energy transmission between a first coil (8) of a charging/discharging station (6) and a second coil (10) of the object (4), wherein a protection area (18, 20) in the surroundings of the charging/discharging station (6) is defined, a detection range (22, 24) of monitoring sensors (16) or an evaluation range of the detection range (22, 24) of monitoring sensors (16) is adjusted to the protection area (18, 20), and the presence of metal and/or persons in the detection range (22, 24) or evaluation range of the monitoring sensors (16) is monitored during a charging/discharging process of the object (4). A computer program and a system (2) which are set up to carry out the method are also stated.

An electrical drive system for an aircraft includes: at least one first and one second electrical direct voltage sources for supplying a direct voltage, and a first and a second electrical machine modules configured to convert electrical alternating voltage into mechanical movement and vice versa. The first and second modules are connected to a first and a second power inverters, respectively. The first and second inverters are connected in series and the first and the second direct voltage sources are connected in series to generate an overall direct voltage to which the inverters are connected. The power inverters each has one voltage measuring device for measuring the power inverter direct voltage present at the respective inverter and a power inverter control device for controlling the operation of the inverters in accordance with the power inverter direct voltage.

Embodiments that provide advanced charging of energy source arrangements for energy storage applications are disclosed. The embodiments can be used within energy storage systems having a cascaded arrangement of converter modules. The embodiments can include the application of pulses to an energy source of each module of the system. The pulses can be applied for a duration sufficient to initiate an electrochemical reaction. Feedback based pulse control embodiments are also disclosed.

A power supply system includes: an inter-load switch including a first switch and a second switch connected in series, a voltage generation unit, an electric storage device connected between the first switch and the second switch, a first state control unit configured to select a first state in which power is supplied from at least one of the voltage generation unit or the electric storage device to a first load and a second load, and a second state control unit configured to, when determining that a failure has occurred, select a second state in which power is supplied from the electric storage device to a load on a side of a no-failure-occurrence system in which no failure has occurred, by turning off a switch on a side of a failure-occurrence system in which a failure has occurred and turning on a switch on a side of the no-failure-occurrence system.

A power supply system includes: an inter-load switch including a first switch and a second switch connected in series, a voltage generation unit, an electric storage device connected between the first switch and the second switch, a first state control unit configured to select a first state in which power is supplied from at least one of the voltage generation unit or the electric storage device to a first load and a second load, and a second state control unit configured to, when determining that a failure has occurred, select a second state in which power is supplied from the electric storage device to a load on a side of a no-failure-occurrence system in which no failure has occurred, by turning off a switch on a side of a failure-occurrence system in which a failure has occurred and turning on a switch on a side of the no-failure-occurrence system.