The present disclosure relates to systems, methods, and devices for controlling charging of vehicles, to avoid charging during charge-adverse time periods or during charge restriction events. This can advantageously reduce cost to vehicles owners, and or provide access to reward incentives. Further, power distribution entities (utility providers) advantageously have increased control over power distribution to avoid over-burdening of power distribution infrastructure. Further, systems and methods for determining or inferring whether a vehicle is connected to a charge station are described, which can be used to inform automatic restriction of vehicle charging.

A pack for containing and recharging an e-cigarette includes: a re-chargeable pack battery; a first connector which is electrically connectable to an external power source; a first recharging mechanism for re-charging the pack battery using the external power source when the first connector is electrically connected to the external power source; a second connector which is electrically connectable to an e-cigarette contained within the pack; and a second recharging mechanism for re-charging the e-cigarette when the e-cigarette is electrically connected to the second connector. The first recharging mechanism includes a first protection circuit module and the second re-charging mechanism includes a second protection circuit module, wherein the protection modules protect the pack and e-cigarette against excessive voltage or current during re-charging.

There is provided a power conversion device including: a non-isolated DC-DC converter provided between a battery and a DC bus to which one or more batteries are connected and a bus voltage is applied; and current limiting means which limits at least one of an input current to the non-isolated DC-DC converter or an output current from the non-isolated DC-DC converter, in which the non-isolated DC-DC converter performs an operation to convert a battery voltage of the battery to the bus voltage for outputting to the DC bus when the battery is discharged, and performs an operation to convert the bus voltage to the battery voltage for outputting to the battery when the battery is charged, and the current limiting means is connected between the non-isolated DC-DC converter and the battery, or between the non-isolated DC-DC converter and the DC bus.

A charging/discharging circuit and an electronic device are provided. The circuit includes: a first terminal of a first branch is connected to an electrical energy supply terminal, and a second terminal of the first branch is connected to the first battery; a first terminal of a second branch is connected to the electrical energy supply terminal, and a second terminal of the second branch is connected to the second battery; the first branch includes a first control circuit; the first control circuit is configured to adjust impedance of the first branch; and a controller is configured to: indicate, based on a first current and a second current, the first control circuit to adjust impedance of the first branch, so that a ratio of the first current to the second current is close to the first value.

This disclosure discloses a power supply apparatus, a power supply system, and a method. The apparatus includes: a power supply bus connected to an output end of a voltage conversion unit and a low-voltage battery through separate bidirectional isolation units. The bidirectional isolation units control connection and disconnection between the bus and the voltage conversion unit or the low-voltage battery. The bidirectional isolation unit includes two switches connected in series. The two switches connected in series each are connected in parallel to one diode, and the two diodes are disposed back to back. The power supply apparatus further includes another circuit, where the circuit is electrically connected to the bus, and is configured to supply power to a load. Solutions in embodiments are applied to new energy vehicles such as an electric vehicle and a hybrid electric vehicle, to improve functional safety performance of power supply of the vehicles.

The present application relates to a power supply circuit of a vehicle, which power supply circuit comprises a first side (A) comprising a power source (14), a first battery pack (12) and first power consumers (16), a second side (B) connected in series with the first side (A), the second side (B) comprising a second battery pack (18) and second power consumers (20), an overload current breaker (22) provided between the first and the second side, said overload current breaker (22) having a pre-determined threshold breaking current (I.sub.Threshold) value, at which value the circuit is broken; a controller (24) connected to said power source for regulating voltage from said power source (14), the controller (24) being provided with said threshold breaking current (I.sub.Threshold) value, the controller further being operatively connected to devices (26, 28) providing information related to a current (I.sub.ch) through said overload current breaker (22). The controller (24) is arranged to determine a maximum permissible charging current (I.sub.Permissible) value in relation to the threshold breaking current (I.sub.Threshold) value; to set a low voltage (V) from said power source (14) for charging said second battery pack (18) at activation of said power source (14); to monitor, with the information from the devices (26, 28), the charging current (I.sub.ch) through said overload current breaker (22) to the second battery pack (18) and to compare the charging current (I.sub.ch) with the maximum permissible charging current (I.sub.Permissible); to increase the voltage (V) of the power source (14) if the charging current (I.sub.ch) is below the maximum permissible charging current (I.sub.ch<I.sub.Permissible); and to decrease the voltage (V) of the power source (14) if the charging current (I.sub.ch) is the same as or above the maximum permissible current (I.sub.chI.sub.Permissible).

A portable energy storage device capable of simultaneous multi-port discharge and a power allocation method. The energy storage device is equipped with multiple charging output ports, some of which have different preset power allocation priorities. This allows the user to determine the priority sequence of multiple power-receiving according to needs when using the device. The invention ensures that when multiple charging output ports are all connected to power-receiving devices and the sum of 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. When the number of charging output ports connected to power-receiving devices changes, the device reallocates power, achieving dynamic power adjustment and enabling the device to operate at its maximum output power whenever possible.

A control method for an inverter circuit is provided. When an output current of a T-type three-level inverter circuit is greater than a preset threshold and the circuit is not in an overcurrent protection state, the overcurrent protection state is triggered. When the circuit is in the overcurrent protection state, outputting of a first drive signal is stopped, and a third drive signal is outputted, so that a first switch transistor and a second switch transistor in a first bridge arm are in an off state due to not receiving the first drive signal, and a second bridge arm is alternately turned on due to receiving the third drive signal.

A short-circuit determination circuit includes a current detection unit, a voltage detection unit, and a short-circuit determination unit. The current detection unit detects the current flowing in a power circuit. The voltage detection unit detects the voltage applied to the power circuit. The short-circuit determination unit determines a short circuit in the power circuit on the basis of the difference between a detection value of the current detected by the current detection unit and a detection value of the voltage detected by the voltage detection unit.

A short-circuit determination circuit includes a current detection unit, a voltage detection unit, and a short-circuit determination unit. The current detection unit detects the current flowing in a power circuit. The voltage detection unit detects the voltage applied to the power circuit. The short-circuit determination unit determines a short circuit in the power circuit on the basis of the difference between a detection value of the current detected by the current detection unit and a detection value of the voltage detected by the voltage detection unit.