Disclosed is a motor-driven vehicle including: a first and second battery; a voltage converter that includes a plurality of switching elements configured to perform voltage conversion between an electric power output path and the first and second battery, and to switch the connection of the first battery and the second battery between an in-series connection and an in-parallel connection; a motor-generator; and a control device configured to turn on and off the switching elements, in which the control device switches connection to either of connection between the electric power output path and both the first battery and the second battery, and connection between the first battery and the second battery based on the switching element temperature, and the operating point of the motor-generator.

This disclosure relates to systems/arrangements and methods for controlling a temperature of a battery and of other electric components of a vehicle, and of a vehicle that includes such a system. An exemplary system may include a temperature control circuit, a battery arranged in a first section of the temperature control circuit, other electric components arranged in a second section of the temperature control circuit that is arranged in parallel with the first section, a flow control device for dividing a flow of a temperature control medium between the first and second sections, a battery temperature sensor for determining the battery temperature, a temperature sensor for determining the temperature of the other electric components, and a control unit configured to receive and process input data from the temperature sensors and to output a control signal to the flow control device in order to control the division of the flow of the temperature control medium between the first and second sections in accordance with the temperatures determined.

A vehicle includes a power reception unit, a rectifier, a power line, and a cooling fan. The power reception unit of the vehicle is configured to receive, in a contactless manner, AC power output from a power transmission unit of a power transmission device. The rectifier rectifies the electric power received by the power reception unit. The electric power rectified by the rectifier is output through the power line. The cooling fan cools the power reception unit. The cooling fan is electrically connected to the power line, and operates with the electric power received from the power line.

A motor drive device includes: an inverter circuit having a smoothing capacitor; a drive circuit portion which outputs an operation signal to the inverter circuit; a control portion which controls the drive circuit portion; and an operating voltage generation portion which supplies power to the drive circuit portion and the control portion by generating an operating voltage for the drive circuit portion and the control portion. The inverter circuit converts a DC voltage from a first power supply to an AC voltage and outputs the AC voltage to a multi-phase motor coil. The control portion outputs a signal to the drive circuit portion according to a command value from a high-level control device operating on power from a second power supply outputting a voltage lower than the first power supply. The operating voltage generation portion is capable of generating the operating voltage using power fed from either of the first power supply and the second power supply.

An electric vehicle includes a motor, an inverter, a battery, a cooler configured to cool the inverter, and an electronic control unit. The electronic control unit is configured to execute following when abnormality occurs to the cooler: i) set a vehicle speed, at which an induced voltage by the motor becomes at most equal to an input voltage that is input to the inverter from the battery side, as vehicle speed limit, and ii) control the motor such that the electric vehicle travels within a range of the vehicle speed limit.

A power-electronics system includes a plurality of power modules each having a power stage and defining a side pocket. The power stages are stacked in an array such that the side pockets are interleaved with the power stages. A dummy module defines a first coolant pocket and is disposed within the array such that the first coolant pocket cooperates with one of the side pockets to define a coolant chamber.

A vehicle power module assembly is provided. The assembly may include a first frame, a second frame, and power stages. The first frame may define a first pair of coolant cavities. The second frame may define a second pair of coolant cavities in communication with the first pair of cavities to define a serial coolant path. Each of the frames may house one of the power stages disposed between the respective pairs of cavities such that coolant flowing through the cavities is in thermal communication with the power stages. The assembly may further include a pair of endplates, one of which defines a channel to divert coolant from a last of the pair of coolant cavities to the outlet cutouts in substantial registration with one another. Each of the first frame and second frame may further define a pass-through fluidly connecting the pair of coolant cavities.

A motor drive device includes: a converter; a power supply; a plurality of inverter units configured to convert DC to AC to drive a plurality of motors by upper arm switching elements connected between a capacitor and motor coils and lower arm switching elements connected between the capacitor and motor coils; a second switch configured to connect the capacitor to the earth; a current detector configured to measure current flowing between the capacitor and the earth; a voltage detector configured to measure the voltage across the capacitor; and, an insulation resistance detector configured to detect insulation resistance of the multiple motors based on the current and voltage measured in a condition that the switching element to which the motor coil to be measured is connected is turned on and the switching elements to which a motor coil other than the target for measurement is connected are turned off.

A vehicle and a temperature control device thereof are disclosed. The temperature control device includes a motor control circuit and a heat exchange medium circulation loop. The motor control circuit includes a switch module, a three-phase inverter, a three-phase alternating current motor, and a control module. The heat exchange medium circulation loop includes a first valve electrically connected to the control module. At least one of the three-phase inverter and the three-phase alternating current motor and the first valve form an electrically driven cooling loop through a heat exchange medium pipeline. The first valve and a component to be heated form a cooling loop through a heat exchange medium pipeline.

An object of the present disclosure is to enable a wire and a refrigerant pipe to be mounted in a compact form in a vehicle. A temperature management system with a wire includes a refrigerant pipe through which a refrigerant for performing heat exchange in a heat exchange target device that is mounted in a vehicle passes and at a wire at least a portion of which extends along at least a portion of the refrigerant pipe.