An interchange energy device for an electric vehicle enables an electric vehicle to be compatible with existing power lines such as overhead catenary system with little to no modification necessary to a modern electric vehicle. The interchangeable energy device has the same form factor as a battery pack, and is fully compatible with the drive system of the vehicle. The interchangeable device enables a battery pack to be swapped for an adapter to take advantage of existing power systems such as an overhead catenary system.

Various personal mobility vehicles, such as scooters, are disclosed. The scooter can include at least one battery and motor for powering at least one driven wheel. The vehicle can include a gear assembly to convert a torque produced by the motor to a different torque to a driven shaft to power the at least one driven wheel. The battery can be removable.

A power supply device for a vehicle that is chargeable from an external power supply provided external to the vehicle, including a main battery and a battery pack that is attachable to and detachable from the vehicle. The battery pack includes a sub battery for driving electric loads common to the main battery and the sub battery, and a connector provided with a first storage unit storing information related to the sub battery. The power supply device for the vehicle further includes a control device performing control related to the main battery, and reading the information from the first storage unit and performing control related to the sub battery.

A foldable electric wheelchair that includes an array of support frame members strategically joined together at hinge joint points to allow the support user seat, a back support frame, a main support frame and a lower support frame to be easily manually folded into an array that are substantially parallel in the same plane occupying a small volume. The electric motors are powered by a pair of batteries each of which is mounted inside hollow main frame support members out of the way to reduce the overall volume and weight of the electric wheelchair

A machine is adapted for operation powered by any one of a plurality of interchangeable power sources. The machine may include an undercarriage configured for supporting ground engagement members that propel the machine and an upper structure rotatably supported on the undercarriage. The upper structure may include a swing frame, with the swing frame supporting an operator cab, any one of the plurality of interchangeable power sources, hydraulic components, electrical components, and a counterweight disposed at a first end of the swing frame. The counterweight may include a hollowed out portion facing toward the swing frame. The hollowed out portion of the counterweight may be centrally aligned with a center core portion of the swing frame configured for supporting any one of the plurality of interchangeable power sources, with the one power source being partially accommodated within the hollowed out portion of the counterweight.

Systems and methods for replacing one or more battery modules of a battery pack include using one or more communication devices to instruct a battery management system of the battery pack that a number of battery modules of the battery pack is equal to a remaining number of battery modules in the battery pack after one or more battery modules have been disconnected. The remaining battery modules of the battery pack may be charged to any voltage within a nominal voltage range while the one or more communication devices are coupled to the battery pack.

Provided is a lock mechanism, wherein the lock mechanism includes a lock base, the lock base is provided with an opening and a cavity extending from the opening, the opening is used for the lock shaft mounted to the battery pack to enter the cavity, the lock mechanism further includes: a lock assembly, the lock assembly is connected to one side of the lock base opposite the lock shaft, the lock assembly is moveable relative to the lock base, and the side of the lock base opposite the lock shaft extends into the cavity or exits the cavity; wherein, the lock assembly is capable of preventing the lock shaft from exiting the cavity from the opening when the lock assembly extends into the cavity; the lock assembly is capable of allowing the lock shaft to exit the cavity from the opening when the lock assembly exits the cavity.

Disclosed are a movable battery replacing platform (103) and a quick replacing system (100), wherein the movable battery replacing platform (103) comprises: a travel-driving portion (106) used for driving the movable battery replacing platform (103) to move on the ground; a lifting portion (107) mounted on the travel-driving portion (106), for lifting a battery during the replacement of the battery; and a battery mounting portion (108) mounted on the top of the lifting portion (107), for placing a battery to be replaced or a replaced battery, wherein the battery mounting porting (108) is provided with a battery replacing device. The device can use an unlocking device (50) to unlock a battery locked on the bottom of an electric vehicle, automatically aligning an unlocking point of a battery locking mechanism and realizing automatic unlocking in the movement. The whole process is fully automated without manual intervention and can improve battery replacement efficiency. In addition, the angle of an upper board (10) relative to the battery unlocking position can be adjusted by a movement actuating device, so that the unlocking point of the battery can automatically fit where the movable battery replacing platform (103) remains still, so as to further improve unlocking efficiency.

A battery pack comprises a plurality of batteries which store electric power for activating an electric utility vehicle; a battery case which accommodates the plurality of batteries therein; and an external frame unit which is provided on an outer surface of the battery case and supports the batteries from below, wherein the external frame unit includes a lower support section placed on a lower surface of the battery case, an upper support section placed on an upper surface of the battery case, and a coupling section which couples the lower support section and the upper support section to each other. This allows the battery case to ensure a required stiffness while providing insulation between the batteries and an outside of the batteries, without increasing a thickness of the battery case.

A battery case unlocking apparatus, a battery case, and a quick battery case replacement system. The battery case unlocking apparatus comprises: a mount (1), an extensible/retractable mechanism (2), a transmission mechanism (3), and a locking mechanism (4). The locking mechanism (4) is used for locking and fixing a body (6) of a battery case to a battery holder (7) of an electric vehicle. The extensible/retractable mechanism (2) passes through the mount (1) and carries out extension/retraction movement in the mount (1) relative to the transmission mechanism (3) to drive the transmission mechanism (3) to move between the extensible/retractable mechanism (2) and the locking mechanism (4), thereby controlling the locking or unlocking of the locking mechanism (4). The battery case comprises the body (6) and the battery case unlocking apparatus. The quick battery case replacement system comprises: the battery holder (7), a replacement device (8), and the battery case.