The hydrogen production apparatus includes: a rectifier supplied with first electrical power from outside, and that outputs direct-current second electrical power; an electrolyzer supplied with the second electrical power and that carries out electrolysis of an alkaline aqueous solution; a pure water tank that retains a pure water; a pure water pipe connected between the pure water tank and an electrolyzer, allowing the pure water to be distributed from the pure water tank to the electrolyzer; an inert gas cylinder that contains an inert gas; and a first valve connected between the inert gas cylinder and the pure water pipe, is the first valve being closed when the first electrical power is supplied, and being open when the first electrical power is not supplied. The inert gas is introduced into the pure water pipe by opening the first valve.

The hydrogen production apparatus includes: a rectifier supplied with first electrical power from outside, and that outputs direct-current second electrical power; an electrolyzer supplied with the second electrical power and that carries out electrolysis of an alkaline aqueous solution; a pure water tank that retains a pure water; a pure water pipe connected between the pure water tank and an electrolyzer, allowing the pure water to be distributed from the pure water tank to the electrolyzer; an inert gas cylinder that contains an inert gas; and a first valve connected between the inert gas cylinder and the pure water pipe, is the first valve being closed when the first electrical power is supplied, and being open when the first electrical power is not supplied. The inert gas is introduced into the pure water pipe by opening the first valve.

A basketball that uses compression or decompression of piezo elements to produce current that charges a rechargeable battery in the basketball. The current is generated by the piezo elements that are placed between an inner shell and an outer shell of the basketball so that the bouncing of the basketball creates current to charge the battery. The charged battery can be coupled to an electronic device (e.g., smartphone) to charge the electronic device.

A basketball that uses compression or decompression of piezo elements to produce current that charges a rechargeable battery in the basketball. The current is generated by the piezo elements that are placed between an inner shell and an outer shell of the basketball so that the bouncing of the basketball creates current to charge the battery. The charged battery can be coupled to an electronic device (e.g., smartphone) to charge the electronic device.

Provided are a three-phase power conversion circuit for a household electrical appliance, a household electrical appliance, and a power-on control method for a household electrical appliance. The three-phase power conversion circuit includes a three-level active PFC unit, at least two power-on units, and a control unit. The three-phase power, subsequent to being converted by the three-level active PFC unit, obtains a first DC power and a second DC power to supply power to corresponding loads. The power-on unit is arranged at input terminals of the three-level active PFC unit to buffer a device in the three-level active PFC unit when the three-level active PFC unit is powered on. A first controllable switch module and a second controllable switch module in the power-on unit and the three-level active PFC unit are controlled by the control unit to complete buffering.

Provided are a three-phase power conversion circuit for a household electrical appliance, a household electrical appliance, and a power-on control method for a household electrical appliance. The three-phase power conversion circuit includes a three-level active PFC unit, at least two power-on units, and a control unit. The three-phase power, subsequent to being converted by the three-level active PFC unit, obtains a first DC power and a second DC power to supply power to corresponding loads. The power-on unit is arranged at input terminals of the three-level active PFC unit to buffer a device in the three-level active PFC unit when the three-level active PFC unit is powered on. A first controllable switch module and a second controllable switch module in the power-on unit and the three-level active PFC unit are controlled by the control unit to complete buffering.

A direct current fast charge (DCFC) system and associated method that lower standby power dramatically when the DCFC system is not in operation, and that provide a reset capability for communication needs. The DCFC system utilizes an appropriate load disconnection switch and an associated control and communication circuit, timer circuit, and automatic turn on system. This improves the reliability of the electronics by removing voltage stress during the standby mode. The DCFC system prevents energy waste, and therefore provides a green alternative to conventional DCFC systems.

A direct current fast charge (DCFC) system and associated method that lower standby power dramatically when the DCFC system is not in operation, and that provide a reset capability for communication needs. The DCFC system utilizes an appropriate load disconnection switch and an associated control and communication circuit, timer circuit, and automatic turn on system. This improves the reliability of the electronics by removing voltage stress during the standby mode. The DCFC system prevents energy waste, and therefore provides a green alternative to conventional DCFC systems.

A battery charging system can include a voltage input, one or more secondary power supplies, direct loads that can be coupled to the voltage input, indirect loads that can be coupled to the one or more secondary power supplies, a switch that can be disposed between the indirect loads and the one or more secondary power supplies, a control circuit directly or indirectly coupled to the switch, and a communications circuit directly or indirectly coupled to the switch.

A battery charging system can include a voltage input, one or more secondary power supplies, direct loads that can be coupled to the voltage input, indirect loads that can be coupled to the one or more secondary power supplies, a switch that can be disposed between the indirect loads and the one or more secondary power supplies, a control circuit directly or indirectly coupled to the switch, and a communications circuit directly or indirectly coupled to the switch.