Provided is a power supply device including a capacitor, a pre-charge circuit and a control circuit. The capacitor is connected in series with a contactor that is connected between an inverter driving a motor and a battery and that switches on or off power supply from the battery to the inverter, and is connected in parallel with the inverter. The pre-charge circuit is connected in parallel with the contactor and pre-charges the capacitor. The control circuit controls the pre-charge circuit and the contactor. The control circuit includes a sensor that measures the voltage of the battery and the voltage of the capacitor, and determines whether the pre-charge is necessary according to whether a ratio of the voltage of the capacitor to the voltage of the battery is equal to or less than a target value.

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 the current-carrying path which is remained is cut off due to destruction of the heater.

An all-solid-state battery module includes an all-solid-state battery; a first electric path connected to a positive electrode of the all-solid-state battery; a second electric path connected to a negative electrode of the all-solid-state battery; a circuit board on which the all-solid-state battery is mounted; and a charge/discharge control switch connected on the first electric path or the second electric path, in which a predetermined charging terminal is connected between the charge/discharge control switch and the positive electrode or between the charge/discharge control switch and the negative electrode.

A secondary battery protection circuit includes a potential-difference control circuit. The potential-difference control circuit provides, when overcharge is detected by an overcharge detection circuit, a control terminal of a charge control transistor with feedback on a potential-difference detection signal to control a potential difference between an electrode of a secondary battery and a terminal for a load and charger. The potential-difference control circuit provides, when overdischarge is detected by an overdischarge detection circuit, a control terminal of each of the charge control transistor and a discharge control transistor with feedback on the potential-difference detection signal to control the potential difference.

A battery unit includes a power supply; a connection configured to be connectable with a load for atomizing an aerosol source or heating a flavor source and a charger for charging the power supply; and a controller that performs a specific process at least selectively executable to at least temporarily disable the supply of electric power to the load from the power supply, if erroneously determining the load connected to the connection as the charger is identified.

A power conversion system for electrically driven mobility device includes a first energy storage device and a second energy storage device having a voltage output lower than a voltage of the first energy storage device, a relay having one terminal connected to the first energy storage device, a DC link capacitor connected to the other terminal of the relay, a first DC converter provided between the DC link capacitor and the second energy storage device and capable of bidirectional voltage conversion, and a controller configured to control the first DC converter to convert a level of the voltage of the second energy storage device and to apply the voltage having the converted level to the capacitor before switching of the relay from an off state to an on state to charge the DC link capacitor to a preset voltage or higher, and then to switch the relay to the on state.

An online reconfigurable battery system with current surge protection modules (SPM), including: a plurality of battery module strings connected in parallel. The battery module string further includes: an SPM and a plurality of enable/bypass battery modules (EBM) connected in series; where the EBM further includes: a battery, a first switch, and a second switch; the first switch and the battery are connected in series, and then connected to the second switch in parallel to form an EBM that can be enabled or bypassed; the SPM further includes: a variable resistor, a third switch, and a fourth switch; the third switch and the variable resistors are connected in series, and then connected in parallel with the fourth switch to buffer the surge current.

A non-contact charging station with a planar-spiral power transmission core, a non-contact power-receiving apparatus, and a method for controlling the same. A primary core of the non-contact charging station transmitting a power signal to a portable device using an induced magnetic field and a secondary core of the non-contact power-receiving apparatus are configured as a power transmission Printed Circuit Board (PCB) core in which a planar-spiral core structure is formed on a core base. The power transmission PCB core has a simplified shape along with improved applicability that facilitates its mounting on a non-contact charger. In addition, the receiving core has a reduced volume to reduce the entire size of the power-receiving apparatus so that it can be easily mounted onto a portable device.

Various embodiments of the present technology may provide methods and apparatus for a battery system. The apparatus may provide a protection control circuit to detect undesired battery conditions and a fuel gauge circuit to confirm the detected battery condition, record the detected condition, and report the recorded conditions.

A system comprises an EVSE and an electric vehicle having a precharge mode. To charge a battery, the vehicle is connected to the EVSE. In some cases, the battery is unable to energize power buses. For example, if the battery is too cold and has insufficient charge, then the battery will not energize the power buses. If the battery cannot energize the power buses, then a precharge mode is enabled. During the precharge mode, charge is pumped onto two power buses until a setpoint voltage is reached. For example, a precharge circuit pumps charge onto one power bus and a power converter pumps charge from that bus onto a second bus. Once the setpoint voltage is reached, a current source charger is enabled, and energy stored on both buses is used to facilitate the turn-on of the charger, the precharge mode is disabled, and the EVSE charges the battery.