US 11,121,650 B2 · Direct current motor combinations for electric vehicles

Abstract

A vehicular propulsion system is described that uses a plurality of direct current (DC) motors operatively attached to a common drive shaft or shafts of an electric vehicle (EV) or boat. Each motor is powered separately by direct current from a battery cassette or trays swappably inserted into the chassis of the vehicle. The battery cassettes are secured in racks, with one or more individual battery cassettes connected to each of individual motors. The individual battery cassettes are sized to have a weight suitable so as to be readily swapped out as needed for recharging, maintenance or replacement, enabling vehicle range to be extended en route by exchanging depleted battery cassettes for new batteries whenever needed. DC motors may be selected to obtain efficiencies greater than obtainable with AC motors, but require no expensive inverter unit.

Claims21

Dependent claims

An electric vehicle having lightweight exchangeably replaceable battery cassettes, which comprises:

a vehicular chassis with one or more driven axle;
a single common drive shaft for each driven axle;
a battery rack having an access port and a plurality of individual bays configured to receive and secure the exchangeably replaceable battery cassettes;
one battery cassette individually insertable into each of the bays, each bay having a guideway externally accessible on the vehicular chassis, wherein each guideway is configured to receive and secure therein a battery cassette;
three or more of DC electric motors operated in synchrony, each DC electric motor having an electrical power connection to the one or more bays in the battery rack;
wherein the three or more DC electric motors are in mechanical linkage with a single common drive shaft having an operative mechanical connection to a wheel axle in need of rotary power;
and,
wherein the total torque deliverable at the wheel axle is the sum of the torque output from all of the DC electric motors.

5 more elements

Dependencies are inferred from the claim text.

Direct current motor combinations for electric vehicles

Life of this patent

Direct current motor combinations for electric vehicles

Life of this patent

Abstract

Claims21