Abstract: A power distribution device comprises a system main relay, i.e., SMR, a pre-charge circuit and a control board. The SMR selects between on and off of a current between a power conversion device and a battery. The pre-charge circuit includes a charge resistor and a charge switch which are provided to charge the smoothing capacitor with power supplied from the battery. The control board enables a current smaller than a current flowing through the SMR. The SMR and the control board are arranged in the x-direction via the pre-charge circuit.

Abstract: A battery device includes a battery pack, a circuit substrate which acquires battery information on the battery pack or controls charge and discharge of the battery pack, a switch including a first power element or a second power element, and a heat radiator. The switch is a device controlling input and output of electric power to and from the battery pack, and an exterior part of the switch is arranged away from the circuit substrate. The heat radiator is a member made of a material having thermal conductivity, and is in direct contact with or indirect contact via a heat conductor with the exterior part of the switch so that heat of the switch can be transferred.

Abstract: A power distribution device has a resin part covering a portion of a power line and a portion of a signal line and having a switch adjacent to one surface of the resin part, and a cooling part disposed adjacent to a back surface of the resin part opposite to the one surface. The power line and the signal line each have, inside the resin part, a laid-out portion extending in a planar direction orthogonal to an arrangement direction in which the one surface and the back surface are arranged, and a led-out portion extending from the laid-out portion toward the one surface. The laid-out portion of the power line and the laid-out portion of the signal line are located in a projection area of the cooling unit projected in the arrangement direction, and are separated from each other and arranged in the arrangement direction.

Abstract: Each of two opposed bus bars includes a main body portion and a connection terminal portion while the connection terminal portion is formed at the main body portion and serves as a portion to be connected to an electric power line portion of a power device. A surface of the main body portion of one of the bus bars is opposed to a surface of the main body portion of the other one of the bus bars, and the other bus bar and the one bus bar are arranged one after the other in a direction perpendicular to the surface of the main body portion. The connection terminal portions of the one bus bar, the connection terminal portions of the other bus bar are arranged one after the other in a direction along the surface of the main body portion.

Abstract: A battery device includes a battery pack, a circuit substrate which acquires battery information on the battery pack or controls charge and discharge of the battery pack, a switch including a first power element or a second power element, and a heat radiator. The switch is a device controlling input and output of electric power to and from the battery pack, and an exterior part of the switch is arranged away from the circuit substrate. The heat radiator is a member made of a material having thermal conductivity, and is in direct contact with or indirect contact via a heat conductor with the exterior part of the switch so that heat of the switch can be transferred.

Abstract: Each of two opposed bus bars includes a main body portion and a connection terminal portion while the connection terminal portion is formed at the main body portion and serves as a portion to be connected to an electric power line portion of a power device. A surface of the main body portion of one of the bus bars is opposed to a surface of the main body portion of the other one of the bus bars, and the other bus bar and the one bus bar are arranged one after the other in a direction perpendicular to the surface of the main body portion. The connection terminal portions of the one bus bar, the connection terminal portions of the other bus bar arc arranged one after the other in a direction along the surface of the main body portion.

Abstract: At least one of a current value and a voltage value of an electrical storage device which is charged and discharged is detected with the use of each of a plurality of sensors. A predetermined process is executed on the basis of the detected values of the plurality of sensors The predetermined process is executed without using the detected values of the sensors in the predetermined process when a difference between a frequency of each of the detected values, which varies with a rotation speed of a motor that operates upon reception of an output power of the electrical storage device, and a resonance frequency of a step-up circuit, which varies with operation of the step-up circuit that steps up an output voltage of the electrical storage device and outputs the stepped-up electric power to the motor, is smaller than a threshold.

Abstract: At least one of a current value and a voltage value of an electrical storage device which is charged and discharged is detected with the use of each of a plurality of sensors. A predetermined process is executed on the basis of the detected values of the plurality of sensors The predetermined process is executed without using the detected values of the sensors in the predetermined process when a difference between a frequency of each of the detected values, which varies with a rotation speed of a motor that operates upon reception of an output power of the electrical storage device, and a resonance frequency of a step-up circuit, which varies with operation of the step-up circuit that steps up an output voltage of the electrical storage device and outputs the stepped-up electric power to the motor, is smaller than a threshold.