A hybrid vehicle includes a control apparatus having an engine controller and a motor controller A first battery and a second battery which has higher voltage than the first battery are provided An electric power generator which is driven by the engine is provided for charging the first battery The second battery and the electric motor are connected through the motor controller, and the first battery or the electric power generator is connected to the motor controller and the engine controller In addition, the first battery or the electric power generator is connected to the engine controller for maintaining a power supply for operation maintenance of the engine controller The second battery and the electric motor are connected through the motor controller The second battery or the electric motor is connected to the motor controller through a DC/DC converter As a result, even if the high voltage line including the electric motor in the control apparatus for the hybrid vehicle has failed, this system can drive the vehicle

Control apparatus for hybrid vehicle

A method is disclosed for improving the performance of an energy storage system that incorporates a high density electrical energy storage device, such a battery or ultracapacitor The method may be implemented in an energy storage system of a hybrid electric vehicle (HEV) as a computer control algorithm for controlling the discharge power limits of an energy storage device, such as a battery The method allows the discharge power limits of the battery to be temporarily expanded under vehicle launch conditions where the power demands are high, thereby making additional stored energy available for use under such conditions by improving battery utilization and providing more consistent vehicle launch characteristics than would otherwise be available

Method for adjusting battery power limits in a hybrid electric vehicle to provide consistent launch characteristics

A hybrid electric propulsion system for powering a vehicle using a natural fuel engine and an electric motor. The hybrid electric vehicle is comprised of a drive train; an electric motor for driving the drive train; an auxiliary power unit (APU); an electric energy storage system electrically coupled to the electric motor; and wherein the auxiliary power unit and the electric energy storage system provide energy for powering the vehicle. An electric bus is directly connected to both the auxiliary power unit and the electric energy source and the voltage across the electric bus is substantially the same as the voltage across the electric energy source so that a change in voltage of the electric bus results in the same change to the voltage across the electric energy source. A power management controller is programmed to control output power of the power unit to maintain the energy storage system between a predetermined high voltage set-point and a predetermined low voltage set-point.

Hybrid electric vehicle

In an electric connection box, even if accuracy of a relative position between a first screw passage hole and a first screw hole, as well as accuracy of a relative position between a second screw passage hole and a second screw hole, is low, the relative positional relation between the first screw passage hole and the first screw hole, as well as the relative positional relation between the second screw passage hole and the second screw hole, can be adjusted because of the provision of a gap between an outer peripheral surface of a constricted engagement portion of a provisionally-placing projection and a hole-defining peripheral surface of a mounting member at the time of mounting a connection box body on the mounting member so that the passage of a first screw through the first screw passage hole and the first screw hole, as well as the passage of a second screw through the second screw passage hole and the second screw hole, can be easily carried out.

Electric connection box

A method for determining a voltage based or current based state of charge (SOC) and state of health (SOH) of a battery system is provided. The method includes: providing a model of the battery system including an equivalent circuit having both low frequency and high frequency elements; establishing a plurality of functional relationships comprising relationship of the equivalent circuit with SOC; reducing at least part of the plurality of functional relationships into a set of time segmented recursive functional relationships, wherein a state at a first time t can be modeled by a functional presentation of a state at a second time t−Δt that occurred before the first time t; and computing a set of data points based upon the set of time segmented recursive functional relationships using a matrix for operation in matrix algebra.

Method and apparatus for generalized recursive least-squares process for battery state of charge and state of health

A hybrid electric vehicle comprises an electric motor, a battery pack for the electric motor, a generator driven by an engine to provide electric power used for charging the battery pack, and a battery management for the battery pack. The battery management determines a current value of battery temperature (BT) of the battery pack and a current value of state of charge (SOC) within the battery pack. What are stored are a first set of varying SOC values and a second set of varying SOC values against varying BT values. The first set of varying SOC values are minimum SOC values required for the battery pack to produce a constant electric power output at varying BT values. The second set of varying SOC values are each indicative of an allowable upper limit to the quantity of electric charge that will accumulate in the battery pack due to operation of charging the battery pack with a constant electric power input at a corresponding BT value. The battery management provide an actuator command for control of electric power input upon charging the battery pack in response to the current value of BT, the current value of SOC, the first set of varying SOC values and the second set of varying SOC values.

Hybrid electric vehicle with battery management

A cooling system for an electric motor of a vehicle comprises an electric motor which drives the vehicle, a reduction gear which adjusts a driving force of an output shaft of the electric motor and transmits the driving force to a drive shaft, and an in-shaft refrigerant passage provided in a shaft of the reduction gear and the output shaft of the electric motor. In the cooling system, a refrigerant which has passed through the in-shaft refrigerant passage is collected outside a motor case housing the electric motor, and is circulated.

Cooling system for electric motor of vehicle

There is disclosed a controller for an electric vehicle that allows for securing a sufficient battery capacity and is able to substantially avoid giving an uncomfortable feeling to the crew even if an engine for power generation is started. The controller comprises a power generation control unit which makes a generator of the electric vehicle generate electric power by starting a generator-driving engine of the electric vehicle in the case that an SOC (state of charge) of a battery of the electric vehicle is equal to or less than a first value, and further makes the generator generate the electric power by starting the generator-driving engine in the case that the SOC of the battery is equal to or less than a second value larger than the first value and a predetermined condition is satisfied. Further, an electric vehicle provided with such a controller is also disclosed.

Controller for electric vehicle and electric vehicle using the same

A generating control device for a hybrid vehicle includes a motor 13 for driving the hybrid vehicle, a battery 12 for driving the motor, a generator 11 for supplying the motor 13 and the battery 12 with electricity, an engine 10 for driving the generator 11 and a control unit 16  In operation, the unit 16 operates to change the operations of the generator 11 and the engine 10 in both of the normal generating mode and the battery protection mode Therefore, it is possible to reduce the deterioration of the battery 12 of the hybrid vehicle and to ensure the fine driving performance

Generating control device for hybrid vehicle

A high power cable ( 53 A, 53 B) connects an electric terminal ( 51 A, 51 B) of a transaxle case ( 45 ) housing an electric motor ( 4 ) coupled to a drive shaft S and an electric terminal ( 52 A, 52 B) of an inverter housing ( 40 ) which supplies power to the electric motor ( 4 ) in a hybrid drive vehicle. A holder ( 54 A, 54 B) is provided which holds the high power cable ( 53 A, 53 B) in a curved shape in the axial direction of the drive shaft. The holder ( 54 A, 54 B) releases the high power cable ( 53 A, 53 B) when a predetermined external force acts on the high power cable ( 53 A, 53 B) toward the front of the vehicle.

Hiroyuki Hirano

Papers

Hybrid electric vehicle with battery management

Cooling system for electric motor of vehicle

Controller for electric vehicle and electric vehicle using the same

Generating control device for hybrid vehicle

High power cable aligning device for electric vehicle