A riding lawn mower, including: a frame; a seat; a walking assembly and a walking motor; a cutting assembly and a driving motor configured to drive the cutting assembly; a first energy storage device configured to supply power to at least one of the walking motor or the driving motor, the first energy storage device detachably mounted to the frame and enabled to supply power to a handheld power tool when detached from the riding lawn mower; and a second energy storage device configured to supply power to at least one of the walking motor or the driving motor; wherein a ratio of a total energy of the second energy storage device to a total energy of the first energy storage device is greater than or equal to 2 and less than or equal to 20.

A riding lawn mower, including: a frame; a seat; a walking assembly and a walking motor; a cutting assembly and a driving motor configured to drive the cutting assembly; a first energy storage device configured to supply power to at least one of the walking motor or the driving motor, the first energy storage device including at least one first energy storage unit, the first energy storage device detachably mounted to the frame and enabled to supply power to a handheld power tool when detached from the riding lawn mower; and a second energy storage device configured to supply power to at least one of the walking motor or the driving motor, the second energy storage device including at least one second energy storage unit; wherein an energy density of the second energy storage unit is different from an energy density of the first energy storage unit.

An apparatus for detecting a presence of an object includes an inductive sensing coil that is configurable to generate a magnetic field. The inductive sensing coil is configured to have an electrical characteristic that is detectable when generating the magnetic field. The apparatus comprises a controller configured to detect a change in the electrical characteristic and determine a presence of the object based on the detected change in the electrical characteristic.

Systems and methods of stopping propulsion of an electric vehicle in an emergency situation are provided. One method includes receiving a command to stop propulsion of the electric vehicle while the electric vehicle is in motion, and in response to the command, attempting to regulate an operation of an electric motor of the electric vehicle toward a no-load operating state of the electric motor while the electric vehicle is in motion. When the operation of the electric motor is outside a prescribed range of the no-load operating state after attempting to regulate the operation of the electric motor toward the no-load operating state, the method includes causing braking of the electric motor.

An electric travelling vehicle including: a motor controller configured to control an electric motor based on displacement of a steering operation part to a forward travel position, a neutral position, and a rearward travel position, a brake controller configured to bring an electromagnetic power-off brake into a released state or a braking state; and a travel state detector configured to detect a travelling state that is accompanied with the released state, a stopped state that is accompanied with the braking state, and a transit stopped state that is accompanied with the braking state.

A solar powered cooler assembly includes track drive that is drivable over a support surface. The track drive includes a pair of tracks that is each drivable in a forward direction or a rearward direction. Each of the tracks is drivable independently of one another for steering the track drive and facilitating the track drive to have a zero turning radius. A cooler is mounted to the track drive for transporting the cooler over the support surface. A personal electronic device is in wireless communication with the track drive for remotely controlling the track drive. In this way the personal electronic device facilitates the user to drive the track drive.

An apparatus for detecting a presence of an object includes an inductive sensing coil that is configurable to generate a first magnetic field. The inductive sensing coil is configured to have an electrical characteristic that is detectable when generating the first magnetic field. The electrical characteristic is configured to vary as a function of a second time-varying magnetic field simultaneously applied to the object. The apparatus comprises a controller configured to detect a change in the electrical characteristic and determine a presence of the object based on the detected change in the electrical characteristic. The electrical characteristic comprises one or more of an equivalent resistance, an equivalent inductance, an equivalent impedance, and an impulse response of the inductive sensing coil. The object comprises one or more of a ferromagnetic object, a metallic film and a metallic foil.

The life of a power storage pack to be mounted on an electric vehicle is prolonged while maintaining user convenience. A monitoring device (1) communicates with a storage device (4) storing power storage packs (2) to be mounted on a electric vehicle (3) traveling at a low speed in a predetermined area. An acquisition unit of the monitoring device (1) acquires parameter information including information of a user who uses the electric vehicle (3) and state information of the power storage packs stored in the storage device (4). A prediction unit of the monitoring device (1) predicts an amount of power consumption of the electric vehicle (3) used by the user, based on the acquired parameter information. A selecting unit of the monitoring device (1) selects a combination of power storage packs to be mounted on the electric vehicle among the power storage packs, based on the predicted amount of power consumption and the acquired state information on the power storage packs.

A battery-operated electric hydrostatic utility tractor is disclosed. The utility tractor is a zero-emissions and more capable of powering work attachments to many chores. The tractor frame is supported by ground wheels and is configured to operative couple work accessories. The work accessory has a power connection to couple with an electric source or a pressurized hydraulic fluid carried by the utility tractor. A hydrostatic pump is configured to produce the source of pressurized hydraulic fluid and includes an integrally contained transaxle for selectively providing a hydraulic motive force to a driveshaft for each of an opposed pair of drive wheels. An electric motor has an output axially aligned with an input shaft of the hydrostatic pump, for developing the source of pressurized hydraulic fluid by the hydrostatic pump. A plurality of battery compartments are compartments configured to receive a rechargeable battery to provide the electric source.

An electronically controlled detachable motorized track system for a snowboard having front and rear baseplates sized to fit in a backpack with right and left motorized tracks having a length extending beyond the front and rear baseplates from proximate the rear of a snowboard to proximate the front of a snowboard and beyond the front and rear baseplates, each adapted for wrapping around drive rollers and freely rotating rear rollers. A hand controller wirelessly controls the tracks.