A diagnosis system performs, while a vehicle is being driven, a diagnosis of a rotation portion of a rotating electrical machine included in the vehicle. The diagnosis system includes a measurement unit that, when performing the diagnosis of the rotation portion, stops charging of a storage battery included in the vehicle from the rotating electrical machine, and measures an inductive voltage of the rotating electrical machine generated by a rotation of the rotation portion, and a judgment unit that judges that there is an anomaly in the rotation portion when a magnitude of the inductive voltage is equal to or larger than a predetermined value.

A diagnosis system performs, while a vehicle is being driven, a diagnosis of a rotation portion of a rotating electrical machine included in the vehicle. The diagnosis system includes a measurement unit that, when performing the diagnosis of the rotation portion, stops charging of a storage battery included in the vehicle from the rotating electrical machine, and measures an inductive voltage of the rotating electrical machine generated by a rotation of the rotation portion, and a judgment unit that judges that there is an anomaly in the rotation portion when a magnitude of the inductive voltage is equal to or larger than a predetermined value.

A vehicle control apparatus includes a generator, a brake system, first and second sensors, first and second deceleration rate setting units, and a power generation torque controller. The first deceleration rate setting unit sets, when a first control mode that decelerates a vehicle on the basis of a brake operation performed by an occupant is executed, an allowable deceleration rate upon deceleration of the vehicle on the basis of a brake operation amount. The second deceleration rate setting unit sets, when a second control mode that decelerates the vehicle on the basis of a situation ahead of the vehicle is executed, the allowable deceleration rate upon deceleration of the vehicle on the basis of a brake fluid pressure. The power generation torque controller controls power generation torque of the generator on the basis of the allowable deceleration rate that is set by the first or second deceleration rate setting unit.

A vehicle control apparatus includes a generator, a brake system, first and second sensors, first and second deceleration rate setting units, and a power generation torque controller. The first deceleration rate setting unit sets, when a first control mode that decelerates a vehicle on the basis of a brake operation performed by an occupant is executed, an allowable deceleration rate upon deceleration of the vehicle on the basis of a brake operation amount. The second deceleration rate setting unit sets, when a second control mode that decelerates the vehicle on the basis of a situation ahead of the vehicle is executed, the allowable deceleration rate upon deceleration of the vehicle on the basis of a brake fluid pressure. The power generation torque controller controls power generation torque of the generator on the basis of the allowable deceleration rate that is set by the first or second deceleration rate setting unit.

A system for protecting a vehicle inverter from overvoltage includes a first inverter having switching elements and converting energy from an energy storage device into AC power. A first motor is driven by receiving the converted AC power. A second inverter is connected in parallel with the first inverter, includes a switching elements, and converts energy from the energy storage device into AC power. A second motor is driven by receiving the converted AC power. A first capacitor is connected in parallel between the first inverter and the energy storage device and stores electric energy of the first motor during regenerative braking. A controller turns off a relay connecting the energy storage device and the motor when a voltage of the first capacitor is equal to or greater than a predetermined voltage and operates the switching elements in the inverters in response to first and second current commands.

A powertrain for an electric vehicle has a driveshaft connected to two or more motors where each motor is connected to a battery pack associated with that motor. A controller is used to select one or more motors to be energized for propulsion or used for regenerative braking to recharge the battery pack to which it is coupled. The controller can optimize the state of charge (SOC) difference of the battery packs and provide for a smooth and efficient powering of the vehicle for acceleration and climbing and optimize the range of the vehicle by management of the relative SOC of the battery packs. The electric vehicle can include two or more fuel cells that individually coupled to a motor.

A regenerative torque control unit is configured to reduce a regenerative torque and increase a rising gradient of the regenerative torque at a start of regeneration when a road surface friction coefficient acquired by a road surface friction coefficient acquisition unit is low as compared to when the road surface friction coefficient is high. Thus, it is possible to suppress occurrence of a slip on a low μ road, and it is less likely to provide a feeling of strangeness from a change between a low μ road and a high μ road.

A regenerative torque control unit is configured to reduce a regenerative torque and increase a rising gradient of the regenerative torque at a start of regeneration when a road surface friction coefficient acquired by a road surface friction coefficient acquisition unit is low as compared to when the road surface friction coefficient is high. Thus, it is possible to suppress occurrence of a slip on a low μ road, and it is less likely to provide a feeling of strangeness from a change between a low μ road and a high μ road.

Systems and methods directed to improved battery management, motor control, energy storage and battery charging. The systems and methods enable vehicle electrification and provides a paradigm changing platform that enables integration of battery management, charging and motor controls with means to manage regenerative braking, traction and handling. In embodiments, systems and methods are directed to a unified modular battery pack system having a cascaded architecture comprising an integrated combination of a networked low voltage converter/controller with peer-to-peer communication capability, embedded ultra-capacitor or other secondary energy storage element, battery management system and serially connected set of individual cells as the fundamental building block.

Systems and methods directed to improved battery management, motor control, energy storage and battery charging. The systems and methods enable vehicle electrification and provides a paradigm changing platform that enables integration of battery management, charging and motor controls with means to manage regenerative braking, traction and handling. In embodiments, systems and methods are directed to a unified modular battery pack system having a cascaded architecture comprising an integrated combination of a networked low voltage converter/controller with peer-to-peer communication capability, embedded ultra-capacitor or other secondary energy storage element, battery management system and serially connected set of individual cells as the fundamental building block.