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18460 results about "Electric vehicle" patented technology

An electric vehicle, also called an EV, uses one or more electric motors or traction motors for propulsion. An electric vehicle may be powered through a collector system by electricity from off-vehicle sources, or may be self-contained with a battery, solar panels or an electric generator to convert fuel to electricity. EVs include, but are not limited to, road and rail vehicles, surface and underwater vessels, electric aircraft and electric spacecraft.

Method and apparatus for a hybrid battery configuration for use in an electric or hybrid electric motive power system

A power system for an electric motor drive such as may be used in an electrically propelled vehicle incorporates the combination of a high power density battery and a high energy density battery to provide an optimal combination of high energy and high power, i.e., a hybrid battery system. The hybrid battery system in one form includes components which prevent electrical recharge energy from being applied to the high energy density battery while capturing regenerative energy in the high power density battery so as to increase an electric vehicle's range for a given amount of stored energy. A dynamic retarding function for absorbing electrical regenerative energy is used during significant vehicle deceleration and while holding speed on down-hill grades, to minimize mechanical brake wear and limit excessive voltage on the battery and power electronic control devices. The high energy density battery coupled in circuit with a boost converter, a high power density battery, a dynamic retarder, and an AC motor drive circuit. The hybrid battery system is controlled by a hybrid power source controller which receives signals from a vehicle system controller using current and voltage sensors to provide feedback parameters for the closed-loop hybrid battery control functions.
Owner:GENERAL ELECTRIC CO

Method and arrangement in a hybrid vehicle for improving battery state-of-charge control and minimizing driver perceptible disturbances

Method for minimizing driver perceptible drive train disturbances during take-off in a hybrid electric vehicle when maximized power is often desired is disclosed. The method includes sensing an actual state-of-charge (SOC) value of a battery in a hybrid electric vehicle and a traveling velocity of the vehicle during take-off operation. The sensed actual SOC value is compared with a SOC reference value and computing a delta SOC value as a difference therebetween. A velocity-based SOC calibration factor is looked up that corresponds to the traveling velocity of the vehicle. A combination is utilized of the delta SOC value and the SOC calibration factor as a SOC feedback engine speed control instruction to an engine controller of the hybrid electric vehicle. A driver's desired vehicular acceleration is sensed based on accelerator position. Maximum possible engine power generatable at the sensed vehicle speed is determined, as is a required power value from the power train of the vehicle to meet the driver's desired vehicular acceleration. The maximum possible engine power generatable at the sensed vehicle speed is compared with the required power value and computing a delta power train requirement value as a difference therebetween. A velocity-based and accelerator position-based power calibration factor is looked-up that corresponds to the traveling velocity of the vehicle and the accelerator position. A combination of the delta power train requirement value and the power calibration factor is utilized as a power requirement feed-forward engine speed control instruction to an engine controller of the hybrid electric vehicle.
Owner:VOLOVO CAR CORP
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