An intelligent rechargeable battery pack having a battery management system for monitoring and controlling the charging and discharging of the battery pack is described. The battery management system includes a memory for storing data related to the operation of the battery, and the battery management system is also configured to communicate the data related to the operation of the battery to other processors for analysis.

The present invention refers to a method of intrinsically biasing a dual DC/DC converter by means of an active pre-charging of the internal side of the converter prior to its connection with the batteries and a soft biasing of the batteries after the connection of the converter with the batteries. This has the advantage of having a dual DC/DC converter capable of charging isolated batteries in photovoltaic installations in a pole to ground configuration, eliminating the biasing transient that occurs when connecting the battery by means of passive resistive soft charging to the internal capacitor bus of the DC/DC converter, and also eliminating the biasing transient that occurs when starting the DC/DC converter for its normal operation.

A method for protecting a battery of an electronic device including a plurality of batteries, includes: measuring a total current (I.sub.total) value output from a charging module while the plurality of batteries are charged via the charging module; detecting a first current (I.sub.1) value output to a first battery via a current limiter; calculating a difference between the total current (I.sub.total) value and the first current (I.sub.1) value to estimate a second current (I.sub.2) value transferred to a second battery without passing through any current limiter, where the first battery and the second battery are included in the plurality of batteries; and controlling, based on the estimated second current (I.sub.2) value, a current of the second battery, which has the second current (I.sub.2) value, by controlling opening/closing of a switching module included in a protection circuit module of the second battery.

A battery voltage equalization device 1 includes: a transformer T including a primary winding T1 into which the output voltage of a battery pack BP is inputted and a plurality of secondary windings T2 corresponding to each of batteries B; a conversion circuit 2 that converts an AC voltage outputted by the secondary windings T2 to a DC voltage; a cutoff circuit 3 provided to cut off a conductive pathway from the conversion circuit 2 to the batteries B; and a control unit 5 that controls the energization of the primary winding T1, wherein the cutoff circuit 3 includes a first switch SW1 and the second switch SW2 which are provided in series on the conductive pathway and which are opened or closed by the control unit, a first body diode Db1 and a second body diode Db2 of which the same terminals are connected to each other and which are respectively connected in parallel with the switches, and a surge suppression resistor Rss connected in parallel with the first body diode Db 1 or the second body diode Db2 for which the direction of charging current to the batteries B is the forward direction.

A control system for charging an aircraft, comprising: a battery pack, an input device configured to enable a user to select between different charging modes, two main contactors connecting the battery pack to an electric propulsion unit (EPU) load and an auxiliary load, a EPU load contactor connecting the battery pack to the EPU load and a controller configured to receive the selected charge mode and control the contactors, keep the two main contactors open upon receiving a user selection to charge in a first mode, close the two main contactors and keep an EPU load contactor open upon receiving a user selection to charge in a second mode, and close the two main contactors and the EPU load contactor upon receiving a user selection to charge in a third mode.

Systems and methods for load pre-charging may include a machine having one or more machine batteries, one or more machine loads, and a pre-charge circuit intermediary to the one or more machine batteries and the one or more machine loads. The pre-charge circuit may include a power resistor electrically coupled in series with the one or more machine batteries. The pre-charge circuit may include a plurality of arrays of positive temperature control (PTC) resistors, the plurality of arrays of PTCs resistors electrically coupled in parallel with one another, and in series between the power resistor and the one or more machine loads.

The present disclosure relates to an overcurrent protection system for a vehicle whereby an electrochemical cell provides an interface between an inverter and a DC-DC converter. One or more sensors are operatively connected a terminal of an electrochemical cell for determining a current therethrough, and a switch is operated to enter a second state whereby a conductive path through an electrical terminal of the electrochemical cell is interrupted in dependence on a measured current. The present disclosure also relates to a vehicle.

Provided is a method for controlling an output voltage in a power supply system, including calculating, by a virtual resistance calculator, a virtual resistance value when a value of a measured output current exceeds a predetermined current limit value; calculating a signal input to a controller based on the calculated virtual resistance value; and generating, by the controller, a signal for controlling an output voltage based on the signal input to the controller.

The present invention concerns a power supply arrangement for a portable electronic device. The inventive arrangement uses a large value capacitor in the power supply circuitry to extend the operational life of the battery. The large capacitor builds up the power reserve thereby increasing current output. Because of the small footprint of the device, multiple smaller capacitors are connected in series to build up the large capacitor value. The arrangement preserves battery power by reducing the leakage typically present when using a single large capacitor. The arrangement also effectively reduces the battery's internal resistance.

A portable energy storage device capable of simultaneous multi-port discharge and power allocation method, the device including multiple charging output ports, all or part of which have different preset power distribution priorities, enabling the user to determine the priority sequence of multiple power-receiving devices according to actual needs when using the device. Furthermore, when multiple charging output ports are all connected to power-receiving devices and the sum of the required power of the power-receiving devices exceeds the maximum power that the device can provide, all ports can still operate at their respective preset minimum power. If there is remaining power, the remaining power is preferentially allocated to the charging output ports with higher priority. Furthermore, when the number of charging output ports connected to power-receiving devices changes, the device reallocates power, thereby achieving dynamic power adjustment and enabling the device to operate at its maximum output power whenever possible.