Abstract: There is provided a method and apparatus for requesting a battery to be unlocked from an e-vehicle using an application for authorizing a user to unlock the battery. A request is received at a cloud-based server, to unlock the battery from the micro mobility vehicle. Authorisation data is provided, by the cloud-based server, if the user making the request is permitted to unlock the battery at the e-vehicle. Further, methods and apparatus for controlling a self-serviced battery swap station by a cloud-based server are described. In one example battery data may be obtained from a cloud-connected battery swap station and used to generate battery charging control data. In one example, the battery charging control data is sent to the battery swap station.

Abstract: A rotary shaft includes a projection protruding from a rotor along an axial direction of the rotary shaft. The projection has an outer peripheral surface provided with teeth engaged with a gear. The rotor has a first portion which is located around the rotary shaft and which is fixed to the rotary shaft. The rotor has a second portion which is located at an end of the rotor, the end facing the projection. The second portion has an inner diameter larger than an inner diameter of the first portion.

Abstract: System and method configured to determine a direction of movement of a vehicle in response to a brake being released or in response to initiating movement of the vehicle from a stopped position along a route. The direction of movement is determined based on a selected travel direction of the vehicle, a grade of the route, and at least one of applied tractive efforts or applied braking efforts.

Abstract: An antenna apparatus is disclosed, including a lower housing, a middle housing disposed on the lower housing and having one surface formed with one or more first heat dissipation fins, a first accommodation space formed by the lower housing and the middle housing, at least one first heat-generating element disposed in the first accommodation space, one or more heat dissipation supports each disposed on the middle housing and having at least one surface formed with one or more second heat dissipation fins, and an antenna module supported on the one or more heat dissipation supports.

Abstract: A power-assist drive system for a vehicle (e.g., a bicycle) is provided. The system includes a drive unit assembly attached to a frame of a vehicle and a motor having an output shaft, and a drive gear rotatably associated with the output shaft. The system further includes a driven unit assembly including a driven gear configured to be attached to a wheel hub of the vehicle, and a brake disc coaxially attached to the driven gear. The drive gear may be configured to operably engage the driven gear to transmit power from the motor to the wheel hub. A brake caliper may be integrated with the drive unit assembly. The system may further include a battery and a speed controller configured to receive an input signal to selectively direct electrical power from the battery to the motor to drive the wheel via the drive gear and the driven gear.

Abstract: A drive unit is configured to be provided to a human-powered vehicle. The drive unit includes a base on which a crankshaft is provided, and a holder mount provided on the base. The holder mount is configured to selectively mount a battery holder, which is configured to hold a battery unit, at a plurality of positions in a predetermined linear direction.

Abstract: An underwater thruster with improved guide stability and increased kinetic energy utilization rate comprises a power part and a propeller, wherein the power part is provided upstream of the propeller for driving the propeller to rotate. The underwater thruster further comprises a diversion part which is provided between the water inlet part and the water outlet part and is connected with the water inlet part and the water outlet part respectively in a plug-in manner, to uniformly disperse water entering the water inlet part to blades of the propeller.

Abstract: A bicycle propulsion system including a concentric rotor assembly and a chassis assembly. The concentric rotor assembly: defines an outer drive surface; defines an inner retention surface; includes a set of sprocket brackets arranged about the inner retention surface of the concentric rotor assembly and configured to engage with teeth of a bicycle sprocket; and is configured to engage around the bicycle sprocket, wherein a center axis of the outer drive surface is concentric with a rotational axis of the bicycle sprocket. The chassis assembly: is configured to secure to a stay of the bicycle; includes a retention subassembly configured to translationally constrain the concentric rotor assembly relative to the chassis assembly; includes a drive subassembly configured to engage the outer drive surface of the concentric rotor assembly; and includes a motor configured to rotate the concentric rotor assembly via the drive subassembly.

Abstract: Method and device for dynamically controlling a range of an electrically-assisted bicycle comprising an energy storage and an electric motor, wherein the method is calculating a route from the current bicycle location to the target location, dividing the calculated route into at least two segments, calculating, for each of the at least two segments, an amount of energy to be provided to the electric motor such that an energy threshold of the energy storage is maintained for the at least two segments under consideration of an environmental value and a currently available charge of the energy storage and calculating an assistance factor therefrom according to which energy is provided to the electric motor during the first segment and wherein the amount of energy to be provided to the electric motor and the assistance factor is recalculated for the second segment if an amount of energy consumed during the first segment exceeds a predetermined deviation threshold.

Abstract: A rider-posture changing device is for a human-powered vehicle. The rider-posture changing device includes a first member, a second member, a positioning structure and an electric actuator. The second member is configured to be movable relative to the first member. The positioning structure is configured to adjustably position the first member relative to the second member. The electric actuator is configured to actuate the positioning structure. The electric actuator includes a first electrical connector and a second electrical connector. The first electrical connector is configured to be detachably and reattachably connected to a first power supply. The second electrical connector is configured to be detachably and reattachably connected to a second power supply.

Abstract: A human-powered vehicle control device includes a controller configured to control a motor that assists propulsion of a human-powered vehicle including a movable member that is extensible and retractable. The controller controls the motor in accordance with actuation of the movable member during an extending or retracting action of the movable member.

Abstract: A motorcycle, or saddle type vehicle, is disclosed that may have at least one seat and at least two wheels, at least one hub electric motor. A large dry storage compartment may be positioned between the rider and steering mount. A rechargeable battery and battery management system may be located below the storage compartment in a battery housing, where the battery housing may be a structural component of the chassis. A rear electronics housing may be attached to and located behind the battery housing, and may contain major electrical components such as electric motor controller and contactors. Two structural members, or frame side rails, may form sides of the storage compartment and extend between the electronics housing and steering mount. The electronics housing may also connect to the battery housing such that the battery housing reinforces and strengthens the chassis, or structural frame. A secondary storage compartment may be located under the seat.

Abstract: A bicycle has a bicycle body, a bicycle component, and a battery. The bicycle body has a frame including a down tube, a component mounting portion, and a seat tube. The bicycle component includes a bicycle drive unit. At least a portion of the bicycle component is arranged inside the frame. The battery is mounted on the bicycle to supply the bicycle component with electrical power. The frame further includes a first open portion that is provided on the component mounting portion and opens toward an upper side of the bicycle. At least a portion of the bicycle drive unit is disposed inside the frame and is exposed through the first open portion.

Abstract: An electric vehicle includes a frame, a wheel coupled to the frame, and a battery assembly including a housing supported by the frame. The housing includes a top side and a bottom side opposite the top side. A drive assembly of the electric vehicle is at least partially enclosed within a drive housing unit. The drive assembly includes a motor configured to receive power from the battery assembly and a gear assembly configured to transmit torque from the motor to the wheel. The drive housing unit is positioned below the bottom side of the housing.

Abstract: A bike includes a frame elongated in a longitudinal direction, a front fork rotatably engaged with a front wheel at a front end of the bike, a rear fork rotatably engaged with a rear wheel at a rear end of the bike, a handlebar supported for rotation at the front end of the frame for steering the bike, and a drive module configured to drive the rear wheel of the bike when operated selectively with power. The frame includes a down tube extending downward and rearward from the front end of the bike and a drive module enclosure formed at a second end of the down tube. The drive module enclosure defines a drive module receptacle that is open along the longitudinal direction of the bike. The drive module receptacle is sized to receive the drive module along the longitudinal direction of the bike.

Abstract: An ebike includes a front wheel, a rear wheel, a frame assembly supported on the front wheel and the rear wheel, a battery, and a battery latching assembly to secure the battery to the frame assembly. The battery latching assembly includes a latch member movable among (1) a secured position in which the latch member is configured to secure the battery in a fully mounted position, (2) an open position in which the latch member is configured to maintain the battery in a partially mounted position, and (3) a released position in which the latch member is configured to release the battery. The battery latching assembly also includes a release member coupled to the latch member and movable among (1) a first position in which the latch member is maintained in the secured position, (2) a second position in which the latch member is maintained in the open position and (3) a third position in which the latch member is maintained in the release position.

Abstract: An auxiliary power device adapted for use with a bicycle includes a drive unit, first and second one-way transmissions that are adapted to be mounted in a bike frame of the bicycle, a crankshaft and a transmission sprocket. The first one-way transmission is connected between the drive unit and the transmission sprocket. The second one-way transmission is mounted between the crankshaft and the transmission sprocket. When rotation of the transmission sprocket is driven by the drive unit via the first one-way transmission, the second one-way transmission is idling. When rotation of the transmission sprocket is driven by the crankshaft via the second one-way transmission, the first one-way transmission is idling.

Abstract: Electric power can be generated by using an existing bicycle without impairing the durability of the tire of the bicycle. The bicycle generator device (50) comprises a housing (52) configured to be attached to a frame (18) of a bicycle (10), a generator (54) attached to the housing (52), an annular rotational input member (81) for rotationally driving the generator (54), the rotational input member being rotatably mounted on the housing and positioned around a crank axis line which is a rotational center line of a crankshaft (24) and a crank arm (26) for a pedal of the bicycle, and a connecting member (90, 130) connecting the rotational input member (81) to the crankshaft (24) or the crank arm (26) in a torque transmitting relationship.

Abstract: An electric motorcycle includes a housing for housing an electric motor and/or a transmission. The housing is positioned at the center of the electric motorcycle in a front view. An internal cooling device and/or an electronic component and two cooling elements extend outward from opposite sides of the housing. Exterior cooling ribs are arranged on the cooling elements. The cooling ribs extend in the longitudinal direction of the electric motorcycle, such that the cooling elements and the cooling ribs are directly in contact with the air surrounding the electric motorcycle. The cooling device and/or the electronic component is, at least in portions, housed in and thermally connected to at least one of the cooling elements.

Abstract: A vehicle control system determines an upper non-zero limit on deceleration of a vehicle to prevent rollback of the vehicle down a grade being traveled up on by the vehicle. The upper non-zero limit on deceleration is determined by the controller based on a payload carried by the vehicle, a speed of the vehicle, and a grade of a route being traveled upon by the vehicle. The controller is configured to monitor the deceleration of the vehicle, and to automatically prevent the deceleration of the vehicle from exceeding the upper non-zero limit by controlling one or more of a brake or a motor of the vehicle. The controller also is configured to one or more of actuate the brake or supply current to the motor of the vehicle to prevent rollback of the vehicle while the vehicle is moving up the grade at a non-zero speed.

Abstract: Herein is disclosed a straddle-ridden vehicle frame stiffener comprising a support structure for stiffening the straddle-ridden vehicle frame, the support structure comprising a first side; and a second side, adjacent to the first side; a first mounting element for removably mounting the support structure to the straddle-ridden vehicle frame, the first mounting element being attached to the first side; a second mounting element for removably mounting the support structure to the straddle-ridden vehicle frame, the second mounting element being attached to the second side; and wherein the first side and the second side are rigidly connected to one another.

Abstract: A straddle-type electric vehicle including a main frame extending in a longitudinal direction of a vehicle body, a pivot frame extending downward from a rear portion of the main frame, and a swing arm which is supported by the pivot frame and by which a rear wheel is swingably supported, the straddle-type electric vehicle, further comprising a battery supported by the main frame, a motor unit configured to be coolable by circulation of a cooling medium, a control apparatus that controls the motor unit based on electric power of the battery, and a heat exchanger connected to the motor unit via a pipe that forms a flow path for the cooling medium, wherein the control apparatus and the heat exchanger are arranged anterior to the battery in alignment with each other.

Abstract: A bicycle drive unit includes a housing, a crankshaft and a propulsion assist motor. The housing is configured to be mounted on a frame of a bicycle. The crankshaft is provided to the housing. The assist propulsion motor is provided to the housing to assist propulsion of a bicycle. The propulsion assist motor includes a rotational axis extending in a direction intersecting a direction in which crankshaft extends. The bicycle drive unit is configured such that a distance from a rotational axis of the crankshaft to a part of the bicycle drive unit that is the farthest from the rotational axis of the crankshaft in a direction parallel to the rotational axis of the propulsion assist motor is smaller than or equal to 210 mm.

Abstract: A straddle type electric vehicle comprises a vehicle body frame, a motor unit including an electric motor, a battery that supplies power to the motor unit, and a control unit that executes drive control of the motor unit. The vehicle body frame includes a main frame extending in a vehicle longitudinal direction. The motor unit, the battery, and the control unit are supported by the main frame between the front wheel and the rear wheel, and in a vehicle side view. The motor unit and the control unit are disposed overlapping one another.

Abstract: An electric motor device for pedal assist bicycles may include an electric motor connectable to a rear wheel rim of a bicycle, a pedaling sensor connectable to a hanger of a frame of the bicycle, a charging outlet, a control unit, and a block insertable into an oblique main tube of the frame. The electric motor may include at least one free wheel rigidly connectable to transmission gear wheels of the bicycle. The block may include a battery configured to actuate the electric motor, a motor controller configured to control a plurality of operating parameters of the electric motor, a battery manager configured to manage the battery connected in parallel to the battery and to the motor controller, a plurality of first cables connecting the block to the electric motor, the charging outlet, and the pedaling sensor, and a plurality of second cables connecting the block to the control unit.

Abstract: A bicycle crankarm has a rechargeable battery cell and a recharging port for the battery cell in a face of the crankarm body.

Abstract: A saddled electric vehicle (1, 1A, or 1B) includes an electric motor (30) for vehicle traveling, a battery (100) which supplies electric power to the electric motor (30), a power control unit (320) which controls the electric motor (30), a vehicle body frame (11) which supports the battery (100) and the power control unit (320), step floors (9) on which a rider places his/her feet, and a center tunnel (CT) which extends in a vehicle front-rear direction at a left-right center portion of the step floors (9), in which the power control unit (320) is disposed inside the center tunnel (CT), and the vehicle body frame (11) includes a pair of left and right frame members (13, 14a, and 17), and the power control unit (320) is disposed on an inward side in a left-right direction of the pair of left and right frame members (13, 14a, and 17).

Abstract: A bicycle battery pack that can be reduced in volume includes a housing configured to be located on a frame of a bicycle and battery cells accommodated in the housing. The battery cells include at least a first battery cell and a second battery cell. The housing includes a side wall extending in a longitudinal direction of the frame in a state located on the frame. An outer portion of the side wall includes at least one groove. The at least one groove is recessed toward a region between the first battery cell and the second battery cell.

Abstract: An electric vehicle includes a battery having a housing. The housing includes a rear side which is defined as a side facing away from a forward travelling direction of the electric vehicle. The electric vehicle further includes a frame, a motor having a housing, and a pivot shaft stack-up assembly co-aligned along a pivot shaft axis. The pivot shaft stack-up assembly includes first and second portions of the frame, a swingarm extending therebetween, and an idler bracket. A shock mount is integral with the battery housing. The shock mount extends from the rear side of the battery housing. The battery housing is configured as a stressed chassis member in which each of the motor housing, the frame, and the pivot shaft stack-up assembly are aligned thereof. The shock mount provides a path along which a load is directed to the battery housing.

Abstract: An electric bicycle includes a motor that includes a stator and a rotor and that is driven by a battery, a reduction gear, an output shaft configured to output power of the motor, a sprocket fixed to the output shaft, a housing, and a water jacket configured to cool the motor. The water jacket includes a flange section protruding outward in a radial direction of the stator, the flange section being formed in the water jacket at a side opposite to the reduction gear in a vehicle width direction.

Abstract: A charging connector includes a first electrical socket and a second electrical socket. A first sleeve and a second sleeve are provided, such that the first sleeve is concentrically coupled to the first electrical socket and the second sleeve is concentrically coupled to the second electrical socket. A manifold assembly is adapted to enclose the first and second electrical sockets and the first and second sleeves, such that the first and second sleeves and the manifold assembly create a hollow interior space there between. An inlet conduit and an outlet conduit within the manifold assembly such that inlet conduit, the interior space, and the outlet conduit together create a fluid flow path.

Abstract: An electric bicycle includes a battery, a high voltage electric wire extending from the battery, a motor driven by electricity supplied from the battery, and a reduction gear configured to reduce a speed of output of the motor. The battery is disposed in front of and above the motor. The reduction gear is disposed outside the motor in a vehicle width direction. The high voltage electric wire is disposed in a gap between the reduction gear and the battery in a forward/rearward direction at outer side of the motor in the vehicle width direction.

Abstract: A vehicle having an electrical drive wheel hub system (30) and the hub system incorporated in the vehicle has a wheel hub (18) driven by an electric motor (31) formed by a brushless DC motor having stators (40) and rotors (42). The electric motor is arranged to drive an epicyclic gear system (32) which provides a reduction gear arrangement to drive the hub (18). Located entirely within the periphery of the stator is power circuitry and control circuitry for the electric motor, the circuitry being provided on toroidal printed circuit boards (70, 71).

Abstract: A vehicle has a driver module and a propulsion module selectively connected to the driver module. The modules are separable from each other as independent units. The driver module has a driver module frame, at least one front wheel operatively connected to the driver module frame, at least one front suspension assembly operatively connecting the at least one front wheel to the driver module frame, and a seat connected to the frame. The propulsion module has a propulsion module frame, at least one rear wheel operatively connected to the propulsion module frame, at least one rear suspension assembly operatively connecting the at least one rear wheel to the propulsion module frame, a motor operatively connected to the at least one rear wheel, and an energy storage device operatively connected to the motor.

Abstract: The present invention relates to a portable motor assembly comprising a case, a control module disposed in the case, a motor wrapped up with a friction wheel for connecting to the case and controlled by the control module for rotation, a fixing base connecting to a bottom of the case and having a clamp for fixing to a seat tube of a bicycle and at least one tension spring for pulling down the fixing base and making the friction wheel surrounding the motor tightly press against a surface of a rear wheel of the bicycle to drive a rear wheel of the bicycle.

Abstract: An electric power-assist drive assembly for propelling a vehicle having a frame and at least one spoked wheel includes a rotatable driving ring supporting a plurality of magnets and mountable to the wheel; a stationary stator supporting a plurality of electromagnets and mountable to the frame proximate to the wheel for overlapping the electromagnets and the magnets; and a control assembly mountable to the frame, stator, or any part of the vehicle for delivering electric energy to the stator to rotate the driving ring; wherein rotation of the driving ring propels rotation of the wheel. A vehicle including the electric power-assist drive assembly and a method of propelling a vehicle using the electric power-assist assembly are included.

Abstract: A bicycle component that can be reduced in size in a direction orthogonal to a crankshaft includes a housing and a first mounting portion. The housing includes a support that supports a crankshaft of a bicycle. The first mounting portion is provided on the housing independently from the support to mount the housing on a frame of the bicycle. The first mounting portion includes a through hole through which the crankshaft extends.

Abstract: An electrical component box disposed from above to below a main frame, and a fuel tank disposed in the upper part of the main frame and above the electrical component box, are arranged to the vehicle rear with respect to a head pipe comprising a motorcycle. In this case, the top of the electrical component box is open. In the gap between the electrical component box and the fuel tank, a gap cover is arranged to hide the gap from the outside.

Abstract: An electric vehicle drive device includes a swing arm including an arm portion disposed on a left side, having a front part pivotally supported by a pivot shaft, and including a main wall having a height and extending in a front-rear direction, and a cross arm portion which has a front part pivotally supported by the pivot shaft, and including a coupling portion extending toward the left side to the main wall. A guide hole penetrating through the main wall in a vehicle width direction is formed between a part pivotally supported by the pivot shaft and a part in which the coupling portion extends. A harness extends along a side of the main wall on the left side, passes through the guide hole, and extends along the cross arm portion.

Abstract: A universal micromobility vehicle configured for use in a vehicle share system comprises a frame, a footboard fixed to the frame, a seat fixed to the frame, handlebars, and front and rear wheels supported by the frame. The seat is separated from the footboard in a vertical direction by a fixed distance between 500 mm and 600 mm. The handlebars are separated from the footboard in the vertical direction by a fixed distance between 700 mm and 900 mm. The footboard is fixed to the frame at a fixed vertical distance relative to the lower surfaces of the front and rear wheels between 160 mm and 240 mm. The seat is fixed to the frame at a fixed vertical distance relative to the lower surfaces of the front and rear wheels between 700 mm and 800 mm.

Abstract: A vehicle with a front wheel and a front wheel of a vehicle is provided. The front wheel is drivable by a first drive arrangement, and a rear wheel of the vehicle is drivable by a second drive arrangement. The first drive arrangement may be integrated into the front wheel, and includes an electric motor for selectively rotatably driving the front wheel, a reduction gear between the electric motor and the front wheel, and an actuable coupling for selectively coupling or decoupling the electric motor to the reduction gear.

Abstract: A personal mobility vehicle, such as a scooter, includes at least one battery and motor for powering at least one driven wheel. The vehicle also includes a braking assembly configured to isolate the motor from the at least one driven wheel such that power is terminated from the motor to the at least one wheel in response to a user engaging a braking assembly of the vehicle. The vehicle can include a switch or position sensor that interacts with the braking assembly to initiate the isolation of the motor from the at least one driven wheel and the switch or position sensor preferably is inaccessible to the foot of the user.

Abstract: A bicycle comprises front and rear wheels, a frame supported on the front and rear wheels and including a frame mount, and a battery including a battery mount engaged with the frame mount. One of the battery mount and the frame mount includes a depression and the other of the battery mount and the frame mount includes a boss positioned in the depression. Preferably, depression comprises a slot, and the slot can include a resilient material to securely hold the boss. The boss can comprise an eccentric boss. Preferably, the battery mount is positioned adjacent one end of the battery, and an opposite end of the battery includes an opening. In this embodiment, the bicycle further comprises a mounting pin positioned through the opening and through a portion of the frame to secure the opposite end of the battery to the frame.

Abstract: A battery module that can improve efficiency of operation in maintenance is provided. A battery module includes a battery and a power distribution unit configured to distribute power to a load, wherein the power distribution unit includes a base and a device mounting portion supported by the base and electrically connected to the base to distribute power from the battery to the load, and the base includes a battery connection portion for connection with the battery, and a load connection portion for connection with the load.

Abstract: An electric-motor-assisted bicycle includes a vehicle-body frame and a drive unit including two couplers. The vehicle-body frame includes a bracket and a pair of chain stays. The drive unit is attached to the bracket. Each of the chain stays is attached to a position on the bracket rearward of a crank axle in the front/rear direction of the bicycle. One coupler is forward of the crank axle in the front/rear direction of the bicycle. The other coupler is rearward of the crank axle in the front/rear direction of the bicycle. At least one of a region of the bracket to which the chain stay is attached and a region of the bracket to which the other coupler is attached does not overlap a line segment connecting a shaft center of the axle of the rear wheel to a shaft center of the crank axle.

Abstract: A frame structure for an all-terrain vehicle includes left and right upper main frame members and left and right lower main frame members, each upper and lower main frame member extended in a longitudinal direction of the frame structure. The left and right upper main frame members are horizontally disposed and have upper mounting surfaces. The left and right lower main frame members have forward and rearward portions mounted to the left and right upper main frame members and central portions extended in a lateral direction of the frame structure outward of the left and right upper main frame members. Left and right first sub-frame members are mounted to the forward and rearward portions of the left and right lower main frame members, and are laterally aligned with the left and right upper main frame members in a top view of the frame structure.

Abstract: Disclosed is a battery module, and a battery pack and a vehicle including the battery module. The battery module includes: one or a plurality of unit modules; and a module case having an accommodation space therein in which the plurality of unit modules are placed, wherein the unit module includes: a tube-type unit case having a hollow formed therein; a plurality of battery cells configured in a can-type secondary battery form, located in the hollow of the unit case, disposed side by side along a length direction thereof and electrically connected to each other; and an electrode lead having a positive electrode lead located at one side of the unit module and a negative electrode lead located at the other side of the unit module.

Abstract: A method/control unit for recognizing critical driving situations of a two-wheeled motor vehicle (MV), including: ascertaining an instantaneous slip angle (ISA) and differential slip angle (DSA) of the front/rear wheels; ascertaining an instantaneous roll angle (IRA); comparing the ascertained SAs and DSAs to predetermined values (PV) of maximum allowable slip angles (MASA) or DSAs; comparing the IRA to PVs of a maximum allowable roll angle (MARA); and generating a criticality signal when one of the ISAs is greater than the PV of the MASA, at least one of the instantaneous DSAs is greater than the PV of the maximum allowable DSA, and the IRA is greater than the PV of the MARA. Critical driving situations are recognized with the method, and measures for stabilizing the two-wheeled MV or other safety-enhancing measures may be performed. Special driving situations (driving over low-? patches or braking while negotiating a curve) may be considered.

Abstract: The invention relates to a drive unit for fitting or retrofitting a two-wheeled vehicle (1), preferably a bicycle, having an electric motor which is designed as a disc motor (10), comprising a rotor disc (11) having permanent magnets (12) and an annular stator (13) with windings, which generate an electrical alternating field for driving the rotor disc (11), wherein the rotor disc (11) can be fastened non-rotatably to a receptacle (6) on the front or rear wheel of the two-wheeled vehicle (1) and the annular stator (13) can be fastened to a frame part (4, 5) of the two-wheeled vehicle (1). For tool-free dismantling the annular stator (13) can be unfolded in the circumferential direction and can be removed or pulled off from the rotor disc (11).

Abstract: An electric power unit having a heat emitting component includes a battery case provided in an extension direction of an output shaft of the motor, and spaced apart from the motor case, and a cooling fan provided between the battery case and the motor case. The battery case includes a discharge port formed at a position facing the cooling fan, and a suction port provided at a position spaced apart from the discharge port.