Abstract: A power converter includes a capacitor and a substrate on which a plurality of switching elements for power conversion are mounted. The power converter includes a cooler for cooling the plurality of switching elements and a housing that accommodates the capacitor, the substrate, and the cooler. The power converter includes a power connector exposed from the housing and an output connector exposed from the housing. The power converter includes a plurality of lines that include a plurality of power lines each electrically connected to the capacitor, given switching elements, and the power connector. The plurality of lines include a plurality of output lines each electrically connected to given switching elements and the output connector. At least one among the plurality of lines is a line that includes a conductive pattern formed on the substrate.

Abstract: A power converter includes a positive busbar electrically connected to a positive terminal and the first capacitor electrode, and includes a negative busbar electrically connected to a negative terminal and the second capacitor electrode. The power converter includes output busbars each electrically connected to a given output terminal among multiple output terminals, a given high-side switching element among a plurality of high-side switching elements, and a given low-side switching element among a plurality of low-side switching elements. The power converter includes a cooler that cools the high-side switching elements and the low-side switching elements. The power converter includes a housing that accommodates a supply tube and a discharge tube. The positive terminal, the negative terminal, the output terminals, the inlet port, and the outlet port are exposed on the housing. The inlet port, the outlet port, the supply tube, and the discharge tube are separate members from the housing.

Abstract: A vehicle power supply system includes: a main battery; a sub-battery with output voltage; a power converter having an input end connected to the main battery and an output end connected to a motor and converting output power of the main battery to driving power for the motor; a voltage converter connected between the main battery and the sub-battery and stepping down the voltage of the main battery to the voltage of the sub-battery; a charging inlet connected to the main battery and connecting to a power supply device outside a vehicle; a capacitor connected between a positive electrode and a negative electrode of the input end; and a coil connected between the main battery and the voltage converter. The coil is connected to the capacitor not via a charging power path from the charging inlet to the main battery.

Abstract: A vehicle power supply system includes: a main battery; a sub-battery with output voltage; a power converter having an input end connected to the main battery and an output end connected to a motor and converting output power of the main battery to driving power for the motor; a voltage converter connected between the main battery and the sub-battery and stepping down the voltage of the main battery to the voltage of the sub-battery; a charging inlet connected to the main battery and connecting to a power supply device outside a vehicle; a capacitor connected between a positive electrode and a negative electrode of the input end; and a coil connected between the main battery and the voltage converter. The coil is connected to the capacitor not via a charging power path from the charging inlet to the main battery.

Abstract: A first casing includes a first baffle plate, and a second casing includes a second baffle plate. The second baffle plate is contiguous to a guide rib, which is disposed underneath the second baffle plate, having a horizontal side wall and a slanted side wall. A slit is defined between the horizontal side wall and the slanted side wall, wherein the slit extends to an end face of a partition wall. When the first casing and the second casing are connected to each other, the first baffle plate is slidably inserted in the slit. The first baffle plate projects slightly from the slit into a liquid reservoir chamber, by a distance that is not large enough to increase air resistance with respect to air flowing in the vehicular air conditioning unit. An expansion valve is sandwiched between the first baffle plate and the second baffle plate.

Abstract: A first casing includes a first baffle plate, and a second casing includes a second baffle plate. The second baffle plate is contiguous to a guide rib, which is disposed underneath the second baffle plate, having a horizontal side wall and a slanted side wall. A slit is defined between the horizontal side wall and the slanted side wall, wherein the slit extends to an end face of a partition wall. When the first casing and the second casing are connected to each other, the first baffle plate is slidably inserted in the slit. The first baffle plate projects slightly from the slit into a liquid reservoir chamber, by a distance that is not large enough to increase air resistance with respect to air flowing in the vehicular air conditioning unit. An expansion valve is sandwiched between the first baffle plate and the second baffle plate.