An electrified vehicle include a chassis, a front axle coupled to the chassis, a rear axle coupled to the chassis, an electric motor supported by the chassis, and a trailer coupled to a rear end of the chassis and configured to be towed by the electrified vehicle. The electric motor is configured to drive at least one of the front axle, the rear axle, or a component of the electrified vehicle. The trailer includes a trailer frame, a trailer axle coupled to the trailer frame, and an energy storage device supported by the trailer frame. The energy storage device includes a plurality of batteries. The energy storage device configured to power the electric motor.

A battery pack for an electric work vehicle includes: a box-shaped housing; a transport wheel provided to the housing; a transport handle; a bracket fixed to the housing; a swing shaft for swingably connecting the transport handle and the bracket, between a vertical posture in which the transport handle extends upward from the housing and a horizontal posture in which the transport handle lies above the housing; and a vertical socket for receiving a base end part of the transport handle of the vertical posture to resist a torque of the transport handle caused during an operation.

In an electric work vehicle, a power feeding assembly which connects a battery device to a power controller unit so as to feed power includes a fixed connector which is fixed to the battery device and electrically connected to the battery device, a cable harness connected to a power controller unit, and a free connector which is connected to an end of the cable harness and connectable to a fixed connector, and a connecting operation tool is configured to be movable the free connector between the connecting position in which the free connector is connected to the fixed connector and the detaching position.

A concrete mixer vehicle includes a chassis, a tractive assembly coupled to the chassis and configured to propel the concrete mixer vehicle, a mixing drum rotatably coupled to the chassis, and an electromagnetic device configured to convert electrical energy to mechanical energy to drive the tractive assembly. In a first configuration, a first battery module is removably coupled to the chassis and configured to provide the electrical energy to the electromagnetic device, and in a second configuration, the first battery module is removed from the chassis and replaced with a second battery module, the second battery module removably coupled to the chassis and configured to provide the electrical energy to the electromagnetic device.

An autonomous travel device is provided with wheels, a device main body, a power source that is provided on one end portion of the device main body within the device main body and causes the device main body to travel autonomously by driving the wheels, a battery for supplying power to the power source, and an accommodation unit for accommodating the battery from the other end portion of the device main body to a central portion of the device main body within the device main body. With this configuration, it is possible to easily perform replacement of the battery, and therefore, it is possible to perform autonomous travel that is stabilized due to disposition of the battery in consideration of the center of gravity of the device main body.

An apparatus for providing a secondary power source for an electric vehicle, the apparatus attachable to the electric vehicle and having at least one secondary electrical power storage unit for storing electrical energy for delivery to the electric vehicle as required to replace the primary power source, a power connection assembly to connect the at least one secondary power source to the electric vehicle and a control system to control supply to the electric vehicle.

A concrete mixer truck includes a chassis, a plurality of tractive assemblies coupled to the chassis, a mixing drum rotatably coupled to the chassis, the mixing drum defining an internal volume configured to contain material and an aperture through which the material can enter and exit the internal volume, an energy storage device positioned at a rear end of the chassis and configured to provide electrical energy, and an electromagnetic device electrically coupled to the energy storage device, where the electromagnetic device is configured to receive the electrical energy from the energy storage device and provide mechanical energy to drive at least one of the plurality of tractive assemblies to propel the concrete mixer truck.

The present invention provides a battery-driven traveling device including: a framework section disposed on at least a bottom part of a vehicle body for ensuring strength of the vehicle body; two slide rails being composed of a left slide rail and a right slide rail and being supported by the framework section and extending substantially horizontally; a battery supporting member that is mounted to be insertable into the vehicle body and extractable from the vehicle body by using the two slide rails; and a plurality of dampers disposed on a path through which vibration of the vehicle body is transmitted from each of the slide rails to the battery supporting member for relaxing the vibration transmitted from the vehicle body to the battery while the device travels, wherein the left slide rail is disposed on left side of the battery supporting member and the right slide rail is disposed on right side of the battery supporting member, and each of the dampers is disposed above or below the left slide rail or the right slide rail.

The invention provides a mower, which comprises a battery package assembly and a frame for bearing the battery package assembly; the battery package assembly comprises a battery package and a fixing plate, the battery package is fixed on the fixing plate, a plurality of first pulleys are arranged at the bottom of the fixing plate, and the first pulleys are distributed along the installation direction of the battery package assembly. The frame comprises a supporting surface, and the first pulleys are supported on the supporting surface. The battery package assembly of the lawn mower moves on the supporting surface in a rolling mode, generated friction force is small, and convenience and labor saving can be achieved for the mounting and dismounting processes of the battery package assembly.

A mounting and dismounting system for replaceable power sources is disclosed. The mounting and dismounting system is integrated into a vehicle. The vehicle may be an electric vehicle and the replaceable power source may include at least one battery. The mounting and dismounting system includes a lift rack assembly that engages shafts on the replaceable power source to raise and lower the replaceable power source. The mounting and dismounting system also includes a set of retaining members to help keep the shafts in place. The lift rack assembly includes rack members that move in a substantially vertical direction to limit swinging and tilting.