A vehicular power system includes a battery branch including a battery unit arranged in series with a diode, and a high-capacity unit having a maximum voltage that exceeds a nominal voltage of the battery unit. The battery branch and high-capacity unit are arranged in parallel, to feed a load side of the vehicular power system. The battery branch further includes a switching arrangement configured to disconnect the battery unit in response to excessive load-side current. The switching arrangement may allow the high-capacity unit to inject current into the load side at a voltage less than the nominal voltage of the battery unit and/or may allow the high-capacity unit to absorb regenerated current from the load side at a voltage which is greater than the nominal voltage of the battery unit.

This disclosure provides systems, devices, apparatus and methods, including computer programs encoded on storage media, for wireless power transmission. A wireless power transmission apparatus may transmit multiple wireless power signals to a wireless power reception apparatus configured to combine the power from the multiple wireless power signals. The wireless power reception apparatus may provide a combined wireless power signal to a load such as a battery charger or electronic device. In some implementations, each set of primary coil and secondary coil may utilize low power wireless power signals (such as 15 Watts or less) in accordance with a wireless charging standard. By combining power from multiple low power wireless power signals, the wireless power reception apparatus may support higher power requirements of an electronic device. Multiple communication channels may be established between the wireless power transmission apparatus and the wireless power reception apparatus.

A battery pack includes a housing, a cell group, an interface disposed on the housing so as to be connected to a charger or a power tool. The interface includes a first terminal electrically connected to a first electrode of the cell group, a second terminal electrically connected to the first electrode of the cell group, and a third terminal electrically connected to a second electrode of the cell group. The battery pack includes a first interrupt circuit disposed on a discharging loop, a second interrupt circuit disposed on a charging loop, and a control unit connected to the second interrupt circuit. The second interrupt circuit has an on state and an off stat. The control unit outputs, under a preset condition, a control signal to the second interrupt circuit such that the second interrupt circuit switches from the on state to the off state.

A solar control device controls a solar power generation system having at least one first group including a solar panel and a first DC/DC converter and at least one second group including a second DC/DC converter and a battery. The solar control device includes an electronic control unit that sets an output command value for the second DC/DC converter such that the output command value periodically switches between a first value and a second value that is smaller than the first value, when an output of the second DC/DC converter is equal to or smaller than a threshold value, and determines that the second DC/DC converter is abnormal when the output command value and the output of the second DC/DC converter satisfy a predetermined condition.

The present disclosure provides a charging system and method and a power adapter. The system includes: a battery; a first rectification unit, configured to output a voltage with a first pulsating waveform; a switch unit, configured to modulate the voltage with the first pulsating waveform; a transformer, configured to output a voltage with a second pulsating waveform according to the modulated voltage; a second rectification unit, configured to rectify the voltage with the second pulsating waveform to output a voltage with a third pulsating waveform; and a control unit, configured to output the control signal to the switch unit to decrease a length of a valley of the voltage with the third pulsating waveform such that a peak value of a voltage of the battery is sampled.

A line module for use in a network device includes a plurality of circuits; and a power module connected to the plurality of circuits, and to a first Power Distribution Unit (PDU) and a second PDU, wherein the first PDU and the second PDU provide power distribution by different feeds, wherein the power module is configured to initiate a shutdown procedure when one or more of i) a current drawn from any feed equals or exceeds a first current threshold, and ii) an aggregate current drawn from all feeds equal or exceeds a second current threshold.

A method for reactivation of an electrical system of a vehicle comprising a first electrical system operating at a first lower voltage and a second electrical system operating at a second higher voltage, comprising: detecting a fault or a crash situation in the second electrical system; disconnecting a power source of the second electrical system; determining the fault of the second electrical system is no longer present or that the crash situation is resolved; reconnecting the power source to the second electrical system and increasing the voltage of the second electrical system from zero to an intermediate voltage lower than the second voltage; and if a detected current in the second electrical system is higher than a current threshold value; or if a detected voltage of the first electrical system is higher than a voltage threshold value; reducing the voltage of the second electrical system to zero.

A vehicle includes a battery, an electric power acquirer, a relay, a pre-charge relay, a power supply unit, and a controller. The controller performs a control of electric power transmission through a power line of the vehicle. The controller executes pre-charge processing on a request for operation of the power supply unit, with the relay being in a disconnected state, and with the electric power acquirer being available for electric power acquisition. The pre-charge processing includes raising a voltage of the power line by switching the pre-charge relay. The controller causes a transition of a mode of the electric power transmission to a direct transmission mode. The direct transmission mode includes transmitting electric power acquired by the electric power acquirer to the power supply unit.

A charging base, including a charging circuit, a power supply circuit and a control unit; where the control unit is electrically connected to the charging circuit and the power supply circuit; when a charging voltage or a charging current of the charging circuit exceeds a preset threshold, the control unit controls a connecting line on the charging base to connect to a ground to form a short circuit and be disconnected from an external charging power supply, and controls a charging mode of the charging circuit to switch to a power supply mode of the power supply circuit for supplying power to a safety reminder unit provided on the charging base. The solution in the embodiments can turn off the power output in time and provide a safety alarm when the hardware circuit of the charger fails.

Provided is a protection circuit capable of reliably preventing an overcurrent or a sneak current after cutoff to improve safety, implementing cost reduction with a device configuration simpler than conventional device configurations, and further reducing a failure rate of a device. In a protection circuit, after one of two fuse elements provided in each of a plurality of protection elements is blown due to an overcurrent flowing along a current-carrying path, a heater provided in at least one of the plurality of protection elements generates heat due to a sneak current flowing via the plurality of protection elements on the current-carrying path which is remained and blows the other of the two fuse elements provided in the at least one of the plurality of protection elements.