Abstract: To achieve effective use of space in a vehicle compartment by optimizing arrangement of a high-voltage control equipment unit including batteries. The high-voltage control equipment unit (20) includes two batteries (50-1, 50-2) juxtaposed in the width direction of the vehicle (1), a high-voltage electrical component (56) for controlling power delivery from the batteries (50-1, 50-2), and a case (30) integrally housing the batteries (50-1, 50-2) and the high-voltage electrical component (56). The two batteries (50-1, 50-2) are mounted under front seats (5-1, 5-2). The high-voltage electrical component (56) is mounted between the two front seats (5-1, 5-2) in the vehicle width direction. On a bottom surface (33) of the case (30), a recessed portion (32) in which a propeller shaft (4) extending in the longitudinal direction of the vehicle (1) is formed.

Abstract: Provided are a cooling device and an electric vehicle using the cooling device. The cooling device is used for cooling a switching module containing a switching element as a heating element. The cooling device includes a cooling liquid channel having a plurality of cooling fins through which the cooling liquid flows. The cooling fins have a cut-off portion at the position corresponding at least to a center portion of chips constituting the switching module in the flow direction of the cooling liquid. A chamber is formed in the cooling liquid channel by the cut-off portion.

Abstract: The present invention relates to an electric vehicle and a method of cooling a vehicular DC/DC converter. A fuel cell vehicle, as one example of an electric vehicle, includes a DC/DC converter connected between an electricity storage device and a fuel cell for converting a voltage generated by the electricity storage device and applying the converted voltage to a motor, and converting a regenerated voltage produced by the motor in a regenerative mode or a voltage generated by the fuel cell and applying the converted voltage to the electricity storage device, and a cooling apparatus for cooling the DC/DC converter. The cooling apparatus includes a cooling fluid passage therein for a cooling fluid that flows therethrough, the cooling fluid passage including a bend. The cooling apparatus is constructed such that the cooling fluid flowing upstream of the bend cools upper arm devices, while the cooling fluid flowing downstream of the bend cools lower arm devices.

Abstract: Provided are a cooling device and an electric vehicle using the cooling device. The cooling device is used for cooling a switching module containing a switching element as a heating element. The cooling device includes a cooling liquid channel having a plurality of cooling fins through which the cooling liquid flows. The cooling fins have a cut-off portion at the position corresponding at least to a center portion of chips constituting the switching module in the flow direction of the cooling liquid. A chamber is formed in the cooling liquid channel by the cut-off portion.

Abstract: The present invention relates to an electric vehicle and a method of cooling a vehicular DC/DC converter. A fuel cell vehicle, as one example of an electric vehicle, includes a DC/DC converter connected between an electricity storage device and a fuel cell, for converting a voltage generated by the electricity storage device and applying the converted voltage to a motor, and converting a regenerated voltage produced by the motor in a regenerative mode or a voltage generated by the fuel cell and applying the converted voltage to the electricity storage device, and a cooling apparatus for cooling the DC/DC converter. The cooling apparatus includes a cooling fluid passage therein for a cooling fluid that flows therethrough, the cooling fluid passage including a bend. The cooling apparatus constructed such that the cooling fluid flowing upstream of the bend cools upper arm devices, while the cooling fluid flowing downstream of the bend cools lower arm devices.