A boom and trailing arm control system includes an electronic control module, a plurality of sensors, and a rail connector assembly with a boom, an arm assembly, and a contactor assembly, the rail connector assembly configured to connect with a plurality of conductor rails. The control system also includes an input receiver for the electronic control module configured to receive an input to extend the rail connector assembly from a frame of a mobile machine. The electronic control module is configured to generate commands to extend the boom and arm assembly.

A boom and trailing arm control system includes an electronic control module, a plurality of sensors, and a rail connector assembly with a boom, an arm assembly, and a contactor assembly, the rail connector assembly configured to connect with a plurality of conductor rails. The control system also includes an input receiver for the electronic control module configured to receive an input to extend the rail connector assembly from a frame of a mobile machine. The electronic control module is configured to generate commands to extend the boom and arm assembly.

A vehicle power supply device is provided. The vehicle power supply device includes: a fixed base; a scissor-fork lifting mechanism, where the scissor-fork lifting mechanism is configured to be driven by a drive device to ascend or descend; and the scissor-fork lifting mechanism includes at least one scissor-fork swing rod set, the scissor-fork swing rod set includes at least one pair of swing rods, each pair of swing rods includes two swing rods that are cross-arranged and are hinged with each other, and two swing rods in a pair of swing rods that is closest to the fixed base are separately mounted on the fixed base; and a power supply head, where the power supply head is mounted on two swing rods in a pair of swing rods that is farthest from the fixed base, and the power supply head is driven by the scissor-fork lifting mechanism to ascend or descend.

A vehicle power supply device is provided. The vehicle power supply device includes: a fixed base; a scissor-fork lifting mechanism, where the scissor-fork lifting mechanism is configured to be driven by a drive device to ascend or descend; and the scissor-fork lifting mechanism includes at least one scissor-fork swing rod set, the scissor-fork swing rod set includes at least one pair of swing rods, each pair of swing rods includes two swing rods that are cross-arranged and are hinged with each other, and two swing rods in a pair of swing rods that is closest to the fixed base are separately mounted on the fixed base; and a power supply head, where the power supply head is mounted on two swing rods in a pair of swing rods that is farthest from the fixed base, and the power supply head is driven by the scissor-fork lifting mechanism to ascend or descend.

An energy transfer device is configured for electrically connecting an electrical vehicle to a charging station. The energy transfer device includes a lengthwise link having an upper end and lower end and a crosswise link having an upper end and lower end. The lower ends of the lengthwise link and the crosswise link are configured to be arranged on the electrical vehicle slidably in crosswise direction of the electrical vehicle. The upper end of the crosswise link is connected to the lengthwise link between its ends such that, by sliding the lower ends of the lengthwise link and the crosswise link towards each other, the upper end of the lengthwise link will be moved away from the electrical vehicle for connecting to the charging station.

An energy transfer device is configured for electrically connecting an electrical vehicle to a charging station. The energy transfer device includes a lengthwise link having an upper end and lower end and a crosswise link having an upper end and lower end. The lower ends of the lengthwise link and the crosswise link are configured to be arranged on the electrical vehicle slidably in crosswise direction of the electrical vehicle. The upper end of the crosswise link is connected to the lengthwise link between its ends such that, by sliding the lower ends of the lengthwise link and the crosswise link towards each other, the upper end of the lengthwise link will be moved away from the electrical vehicle for connecting to the charging station.

A slidable current collector has an array of terminals with carbon brushes for contacting conductor rails to deliver electrical power to a moving work machine. The terminals have upper sections with a conductive post, lower sections that include a reservoir of liquid metal, and bladders that connect the upper sections with the lower sections. Magnets surround outer shells of the terminals. Fluid above a threshold pressure fed into the bladders holds the upper sections apart from the lower sections and forces the magnets away from the conductor rails. Fluid below the threshold pressure allows the magnets to clamp the terminals to the conductor, lowers the conductive post into the liquid metal, and urges the carbon brushes against the conductor rails. The bladders provide a fluid suspension distributed across the array of terminals, enabling consistent electrical contact and wear for the carbon brushes.

A slidable current collector has an array of terminals with carbon brushes for contacting conductor rails to deliver electrical power to a moving work machine. The terminals have upper sections with a conductive post, lower sections that include a reservoir of liquid metal, and bladders that connect the upper sections with the lower sections. Magnets surround outer shells of the terminals. Fluid above a threshold pressure fed into the bladders holds the upper sections apart from the lower sections and forces the magnets away from the conductor rails. Fluid below the threshold pressure allows the magnets to clamp the terminals to the conductor, lowers the conductive post into the liquid metal, and urges the carbon brushes against the conductor rails. The bladders provide a fluid suspension distributed across the array of terminals, enabling consistent electrical contact and wear for the carbon brushes.

A connection system for connecting a work machine to an external large-capacity energy source includes an electrically conductive member configured to provide electrical energy from the external energy source to an energy receptacle of the work machine; a first contactor mechanically movable between a closed position electrically connecting the external energy source and the electrically conductive member, and an open position physically disconnecting the external energy source and the electrically conductive member; a second contactor mechanically movable between a closed position electrically connecting the electrically conductive member and the energy receptacle, and an open position physically disconnecting the electrically conductive member and the energy receptacle; and controller configured to receive an indication to disconnect the electrical power system of the work machine from the external energy source; and selectively initiate opening of the first contactor or the second contactor according to the received indication.

A connection system for connecting a work machine to an external large-capacity energy source includes an electrically conductive member configured to provide electrical energy from the external energy source to an energy receptacle of the work machine; a first contactor mechanically movable between a closed position electrically connecting the external energy source and the electrically conductive member, and an open position physically disconnecting the external energy source and the electrically conductive member; a second contactor mechanically movable between a closed position electrically connecting the electrically conductive member and the energy receptacle, and an open position physically disconnecting the electrically conductive member and the energy receptacle; and controller configured to receive an indication to disconnect the electrical power system of the work machine from the external energy source; and selectively initiate opening of the first contactor or the second contactor according to the received indication.