A ride-on vehicle, such as for a child, includes a vehicle body and one or more wheels that support the vehicle body relative to a surface. At least one of the wheels includes a hub motor arrangement that provides a drive torque for propelling the vehicle. The hub motor arrangement includes a housing defining an interior space. An axle or other mounting element(s) define an axis of rotation of the housing. Preferably, the axle or other mounting element(s) do not pass completely through the housing. A motor drives the housing through a transmission. Preferably, the motor is a standard, compact motor that is positioned on the axis of rotation and can be laterally offset from a central plane of the housing. In some embodiments, a traction element is carried directly by the housing.

A scooter includes a frame which has a footboard and supports a rear wheel, a steering column provided with a front wheel pivotably mounted on the frame, and a motor provided with a drive shaft coupled to the rear wheel via a transmission system. The transmission system includes a rear transverse shaft having a first end portion and a second end portion rotatably coupled to the rear wheel; —a gear system having a sprocket coupled rotatably to the first end portion and in meshing engagement with a toothed gear rotatably coupled to the drive shaft; and —a rear structure attached to the frame, supporting the gear system and the rear transverse shaft, and extending laterally along one side only—right or left—of the rear wheel, such that the second end portion extends from the rear structure to support the rear wheel in a cantilevered fashion.

A scooter includes a frame which has a footboard and supports a rear wheel, a steering column provided with a front wheel pivotably mounted on the frame, and a motor provided with a drive shaft coupled to the rear wheel via a transmission system. The transmission system includes a rear transverse shaft having a first end portion and a second end portion rotatably coupled to the rear wheel; —a gear system having a sprocket coupled rotatably to the first end portion and in meshing engagement with a toothed gear rotatably coupled to the drive shaft; and —a rear structure attached to the frame, supporting the gear system and the rear transverse shaft, and extending laterally along one side only—right or left—of the rear wheel, such that the second end portion extends from the rear structure to support the rear wheel in a cantilevered fashion.

A harmonic drive system for a pedal-electric-cycle comprises a transmission gear device including a wave generator assembled by an elliptical cam and a flexible bearing, a flexible-flexspline, a rigid-circular-spline having rigid-circular-spline internal gear teeth, a gear set, and a one-way clutch having an inner surface defining a space for containing a spindle of the pedal-electric-cycle. A first end of the flexible-flexspline has flexible-flexspline external gear teeth for meshing with the rigid-circular-spline internal gear teeth and an inner surface defining a space for containing the wave generator. The gear set has a first input portion connected to a second end of the flexible-flexspline, a second input portion having an inner surface defining a space for containing the one-way clutch, and an output portion connected to a sprocket of the pedal-electric-cycle. The first input portion has a first-input rotational axis. The second input portion has a second-input rotational axis.

A harmonic drive system for a pedal-electric-cycle comprises a transmission gear device including a wave generator assembled by an elliptical cam and a flexible bearing, a flexible-flexspline, a rigid-circular-spline having rigid-circular-spline internal gear teeth, a gear set, and a one-way clutch having an inner surface defining a space for containing a spindle of the pedal-electric-cycle. A first end of the flexible-flexspline has flexible-flexspline external gear teeth for meshing with the rigid-circular-spline internal gear teeth and an inner surface defining a space for containing the wave generator. The gear set has a first input portion connected to a second end of the flexible-flexspline, a second input portion having an inner surface defining a space for containing the one-way clutch, and an output portion connected to a sprocket of the pedal-electric-cycle. The first input portion has a first-input rotational axis. The second input portion has a second-input rotational axis.

A human-powered vehicle includes a crank axle, a first rotational body, a wheel, a second rotational body, a transmission body that transmits a driving force between the first rotational body and the second rotational body, a derailleur configured to operate the transmission body to change a transmission ratio, a motor configured to drive the transmission body and an electric actuator configured to operate the derailleur. A control device has an electronic controller configured to control electric actuator and the motor. The electronic controller is configured to control the electric actuator and drive the transmission body with the motor so that the transmission ratio is changed in a predetermined shifting range in upon determining the derailleur has been actuated to change the transmission ratio and a predetermined condition related to pedaling is satisfied.

A battery-centric virtual grid system may include battery modules, each including: one or more battery cells, one or more processors that obtain performance information from the one or more battery cells, the one or more processors configured to identify a respective device being powered by the respective modules from the plurality based on the respective performance information and to determine characteristics of the respective device being powered by the respective module from the plurality based on the performance information or configured to receive data from the respective device powered by the module from the plurality, the one or more transceivers configured to remotely receive and transmit data, thus the respective device becoming part of an IOT network via the respective module, and an enclosure at least partially enclosing the one or more battery cells, the one or more module processors, and the one or more transceivers.

A home battery backup system may include a plurality of battery modules. Each battery module from the plurality may include one or more battery cells, a power output operably connected to the one or more battery cells, one or more module processors operably connected to the one or more battery cells or the power output, and an enclosure at least partially enclosing the one or more battery cells, the one or more module processors. The power outputs of each of the battery modules in the plurality may be connected to a common bus. A first battery module from the plurality may be settable to a first output power profile and a second battery module from the plurality may be simultaneously settable to a second output power profile different from the first output power profile.

A swappable drive train assembly for a vehicle includes a rod removably attachable to a coupling arrangement of the vehicle that defines a first aperture and connects a first vehicle frame component and a second vehicle frame component. The swappable drive train assembly further includes an assembled gear cartridge attachable to the vehicle by the rod. The assembled gear cartridge is configured to rotate about the rod with respect to the coupling arrangement. The assembled gear cartridge is attachable to the vehicle by extending the rod through the first aperture and a second aperture of the assembled gear cartridge which maintains the connection between the first vehicle frame component and the second vehicle frame component while attaching and detaching the assembled gear cartridge.

A swappable drive train assembly for a vehicle includes a rod removably attachable to a coupling arrangement of the vehicle that defines a first aperture and connects a first vehicle frame component and a second vehicle frame component. The swappable drive train assembly further includes an assembled gear cartridge attachable to the vehicle by the rod. The assembled gear cartridge is configured to rotate about the rod with respect to the coupling arrangement. The assembled gear cartridge is attachable to the vehicle by extending the rod through the first aperture and a second aperture of the assembled gear cartridge which maintains the connection between the first vehicle frame component and the second vehicle frame component while attaching and detaching the assembled gear cartridge.