A battery control device has a relay control unit, that turns on and off a series relay and a parallel relay, and an input-output control unit, that controls the inputs and/or outputs power to and/or from the battery unit. When the relay control unit performs a voltage adjustment sequence to adjust the voltage difference between the plurality of battery packs by turning on and off the series relay and the parallel relay, the input-output control unit controls the input-output section to input or output power adjusted to suppress a circulation current based on a direction and a magnitude of the circulation current.

A system and method for intelligently managing and distributing power from a common power source to multiple Universal Serial Bus (USB) downstream ports. The system integrates dynamic power management capabilities that enable efficient use of the available power and ensure optimal performance of connected devices. The system acquires real-time power consumption data, including current sensing to measure real-time power consumption of the connected devices and provide system wide power monitoring, to provide port power renegotiation based upon the real-time power consumption.

A boost converter circuit is disclosed comprising an input to receive an input voltage from a battery; an output to generate a higher, output voltage for powering a further circuit portion; and a switching arrangement to control generation of the output voltage. The boost converter circuit compares the input voltage with a first reference input voltage and controls the switching arrangement to limit the output current of the boost converter circuit based on the comparison. The boost converter circuit monitors a parameter indicative of a condition of the battery, determines a second, lower reference input voltage in response to the monitored parameter, compares the input voltage with the second reference input voltage and controls the switching arrangement to limit the output current of the boost converter circuit based on the comparison of the input voltage and the second reference input voltage.

According to some embodiments, a battery management system for a metal-hydrogen battery system is presented. In particular, a method of managing a battery system includes applying a charging current through a battery string of the battery system, the battery string including a plurality of coupled batteries; monitoring temperature of the plurality of batteries; determining a maximum charging voltage from a Vtable that relate the charging current, the temperature, and the maximum charging voltage for each battery in the battery string; and stopping the charging current when a voltage across one or more of the batteries of the battery string reaches the maximum charging voltage.

Examples described herein provide a method for direct current (DC) fast charging for a cell of a battery of a vehicle. The method includes determining an anode potential current to apply during the DC fast charging. The method further includes determining a heat generation current to apply during the DC fast charging. The method further includes determining a cell voltage current to apply during the DC fast charging. The method further includes selecting a minimum current from the anode potential current, the heat generation current, and the cell voltage current. The method further includes charging the cell of the battery of the vehicle based on the minimum current.

A method of a central controller, and a central controller, of an energy storage system for controlling two or more battery systems, wherein at least one of the two or more battery systems has at least one operation limitation are presented. The method comprises, and the central controller is configured for: -obtaining information related to the at least one operation limitation from the at least one battery system; -determining, based on the information, control parameters for the two or more battery systems, respectively, taking into account an estimation of how the at least one battery system with the at least one operation limitation will behave over time when being controlled by its control parameters; and -providing the control parameters to the two or more battery systems, respectively.

A wireless charging system includes at least a first charging module and a second charging module. The first charging module includes a first coil module and a first controller unit. The first controller unit controls the first charging module to operate in a first mode and a second mode. The second charging module includes a second coil module and a second controller unit. The second controller unit controls the second charging module to operate in the first mode and the second mode. In response to one of the first charging module and the second charging module operating in the second mode, at least one of the first controller unit and second controller unit further: sets a corresponding one of the first charging module and the second charging module to operate at a first frequency; and sets the other one of the first charging module and the second charging module to operate at a second frequency different from the first frequency.

A multi-port charger allocates a total allocated power to power delivery modules to provide power to respective sink devices at less than or equal to a total rated power capacity of the multi-port charger. Under predetermined conditions, a subsequent power allocation provided to a sink device is allowed to result in the total allocated power of the multi-port charger being greater than the total rated power capacity of the multi-port charger. After the total allocated power has been higher than the total rated power capacity for longer than a timeout time period, the total allocated power is reset to be less than or equal to the total rated power capacity of the multi-port charger.

A shopping cart system includes a shopping cart that includes an input connector that receives a charging current and a DC voltage of a DC power supply different from a supply power supply of the charging current, a first resistor connected in parallel to an input line of the DC voltage, and a first output connector that outputs, to an input connector of another cart connected to a subsequent stage of the cart, the DC voltage across the first resistor and a part of the charging current received by the input connector. The power supply device includes a second output connector that outputs a charging current and a DC voltage via a second resistor connected in series to an output line of the DC power supply, and an energization control unit that stops the charging current when a voltage across the second resistor exceeds a predetermined value.

A wireless earphone may include a first group of contact electrodes, an earphone module, a power module, and a control module. The contact electrodes contact a second group of contact electrodes of a charger to establish an electrical connection between the wireless earphone and the charger. The earphone module outputs a sound signal. The power module provides operating power to the earphone module. The power module is charged from the charger via the first group of contact electrodes. The control module is configured to: in response to establishment of the electrical connection between the wireless earphone and the charger, perform control to prohibit charging the power module using charging power from the charger within a first time period; and after expiration of the first time period, perform control to allow charging the power module using the charging power from the charger.