A power supply includes fuel cell, secondary battery, power converter, current detecting unit and control unit. The power converter couples the fuel cell with the secondary battery, and is adapted to convert current outputted by the fuel cell into output current. The current detecting unit couples the power converter with the secondary battery and adapted to detect charging current of the output current transferred to the secondary battery. The control unit couples the current detecting unit with the power converter and is adapted to: when the charging current is greater than a charging current upper-limit-setting value of the secondary battery, a down-adjustment signal is outputted to the power converter to reduce the output current; and when the charging current is less than the charging current upper-limit-setting value, an up-adjustment signal is outputted to the power converter to increase the output current.

A ground utility robot and implement attachment apparatus having a ground utility robot, at least one implement, at least one solar panel, at least one battery that is chargeable by the at least one solar panel, a power take-off system that is connected to the ground utility robot and to the at least one implement; where the battery powers said ground utility robot and the implement; a safety system that has a computer, a safety program that utilizes a processing logic on the computer, where the safety program initiates precautionary measures that are carried out by the ground utility robot and the power take-off system if an object comes within a predefined distance from the ground utility robot and implement attachment apparatus.

A power supply system connected to a motor unit of an electric vehicle, the power supply system includes: a fuel cell; a secondary battery; a voltage control unit; and a switch. The fuel cell is directly connected to the motor unit, the secondary battery is connected to the motor unit via the voltage control unit, and the switch is configured to switch between a first state in which the secondary battery and the voltage control unit are connected in parallel with the fuel cell and a second state in which the secondary battery and the voltage control unit are connected in series with the fuel cell.

A power supply system connected to a motor unit of an electric vehicle, the power supply system includes: a fuel cell; a secondary battery; a voltage control unit; and a switch. The fuel cell is directly connected to the motor unit, the secondary battery is connected to the motor unit via the voltage control unit, and the switch is configured to switch between a first state in which the secondary battery and the voltage control unit are connected in parallel with the fuel cell and a second state in which the secondary battery and the voltage control unit are connected in series with the fuel cell.

A hydrogen fuel cell, PV solar panel, and thermoelectric power generator powered all-electric mobile utility vehicle with an onboard regulated power supply with multiple power outlets and charging ports that uses DC/DC converters and DC/AC inverters to provide multiple DC and AC voltages to power or charge multiple external electrical devices, electronic instruments, electronic equipment, communications equipment, power tools, and vehicles simultaneously. A utility vehicle integrated with a component thermal management system GPS, Wi-Fi, ADAS, automotive Ethernet, telecommunications, real-time data reporting, warning notification capable, weather station, environmental sensors, with EMI, RFI, high voltage surge protection, circuit breakers, computer and supporting software programs which can be used in on-road, off-road and emergency response situations.

The present invention provides a fuel cell stack protection method, a fuel cell stack protection device and a fuel cell power supply system. The method comprises: determining whether a load-dump failure occurs to the fuel cell; controlling the bleeder circuit connected to the output ends of a DC-DC circuit in the fuel cell so as to discharge the DC-DC circuit when a load-dump failure occurs to the fuel cell. When a load-dump failure occurs to the fuel cell, the bleeder circuit connected to the output ends of the DC-DC circuit in the fuel cell is turned on to discharge the DC-DC circuit so that the DC-DC circuit in the fuel cell can continue to output a current, thus preventing the voltage of a fuel cell stack from rising abruptly because of a load-dump failure and preventing any damage caused by a load-dump failure to the fuel cell stack

A battery management device includes: a first switch state acquisition unit configured to acquire the state of an ignition switch; a determination unit configured to determine to perform correction control for correcting an error in the state of charge (SOC) of the battery when the ignition switch is operated from ON to OFF; a correction control unit configured to perform the correction control of the SOC of the battery when it is determined that the correction control is to be performed; and a second switch state acquisition unit configured to acquire the state of a cancel switch for canceling the execution of the correction control. When the ignition switch is operated from ON to OFF while the cancel switch is ON, the determination unit determines that the correction control is not to be performed.

A hybrid plug-in battery and hydrogen fuel engine vehicle with swappable modular hydrogen tanks and integrated with solar power generation system synergistically combines the advantages of electric vehicle, the solar powered electric vehicle, and the hydrogen fuel engine vehicle. This combination of battery electric vehicle and hydrogen fuel engine vehicle mitigates the issues of prolong charging time of battery electric vehicle and prohibitive high cost of fuel cell electric vehicle. This hybrid configuration of vehicle is able to take advantages of the electric vehicle charging station infrastructure and the hydrogen charging station infrastructure simultaneously. The introduction of the water electrolysis system into the new structure of the hybrid vehicle enables onboard hydrogen generation; has the advantage of conventional hybrid vehicle, but without using fossil fuel. The swappable hydrogen tanks comprise sensors and wireless communication electronic terminals to be shared by all vehicles.

A fuel cell vehicle is mounted with a fuel cell system including a fuel cell stack and a battery. The fuel cell vehicle controls operation of the fuel cell system with an ECU, to perform standby power generation from activation to when travel is allowed and to perform power generation during operation of the fuel cell vehicle after travel has been allowed. In an activation method, the power generation current is increased in accordance with a low-temperature efficiency rate during the power generation during operation, the battery is charged and the power generation current is increased in accordance with a standby current increase rate that is lower than the low-temperature efficiency rate during the standby power generation.

A fuel cell vehicle is mounted with a fuel cell system including a fuel cell stack and a battery. The fuel cell vehicle controls operation of the fuel cell system with an ECU, to perform standby power generation from activation to when travel is allowed and to perform power generation during operation of the fuel cell vehicle after travel has been allowed. In an activation method, the power generation current is increased in accordance with a low-temperature efficiency rate during the power generation during operation, the battery is charged and the power generation current is increased in accordance with a standby current increase rate that is lower than the low-temperature efficiency rate during the standby power generation.