Power converter apparatus

Abstract

To provide a power converter apparatus that boosts power supplied from a battery and outputs the boosted power to a motor, in which a busbar connecting an electronic unit handling boosted power and an AC connector for motor connection can be shortened.SOLUTION: The power converter apparatus includes: a plurality of electronic units for forming a power conversion circuit for boosting power supplied from a high-voltage battery and outputting the boosted power to a motor; a central plate 31 having a plate-shaped partition part 31a supporting the plurality of electronic units; and a motor output connector 15 to which the motor is connected. Above the partition part 31a, a pre-boost electronic unit as an electronic unit handling power before boosting is arranged. Below the partition part 31a, the motor output connector 15 and a post-boost electronic unit for handling power after boosting are arranged.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a power conversion device. [Background technology]

[0002] For example, Patent Document 1 discloses a power control unit equipped with a power module. The power control unit disclosed in Patent Document 1 includes a primary-side capacitor, a secondary-side capacitor, and a reactor. In the power control unit disclosed in Patent Document 1, a connector connected to a DC power supply, the reactor, the primary-side capacitor, and the secondary-side capacitor are arranged below the water jacket. The power module and a drive circuit that drives the power module are arranged above the water jacket. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5382874 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, a power conversion device such as the power module disclosed in Patent Document 1 boosts the power supplied from a battery (DC power source) before outputting it to a motor. The power conversion circuit included in the power conversion device is formed by multiple electronic units, such as a capacitor unit including a capacitor, a reactor unit including a reactor, and a power module. Here, if the electronic unit that handles the boosted power is separated from the motor-connecting AC connector that is connected to the motor, as in Patent Document 1, the bus bar connecting the electronic unit that handles the boosted power and the motor-connecting AC connector becomes long. This results in an increase in the size of the power conversion device and inductance.

[0005] The present invention has been made in consideration of the above-mentioned problems, and has an object to make it possible to shorten the busbar that connects an electronic unit that handles the boosted power to an AC connector for connecting a motor in a power conversion device that boosts power supplied from a battery and outputs the boosted power to a motor. [Means for solving the problem]

[0006] The present invention employs the following configuration as a means for solving the above problems.

[0007] One aspect of the present invention is a power conversion device comprising a plurality of electronic units forming a power conversion circuit that boosts power supplied from a battery and outputs it to a motor, a support plate having a flat partition wall portion that supports the plurality of electronic units, and a motor connection AC connector to which the motor is connected, wherein a pre-boost electronic unit, which is the electronic unit that handles the power before it is boosted, is arranged above the partition wall, and the motor connection AC connector and a post-boost electronic unit, which is the electronic unit that handles the power after it is boosted, are arranged below the partition wall. [Effects of the Invention]

[0008] According to the present invention, the motor-connecting AC connector and the post-boost electronic unit, which is an electronic unit that handles the boosted power, are disposed below the partition wall. Therefore, the present invention allows the motor-connecting AC connector and the post-boost electronic unit to be disposed close to each other, and makes it possible to shorten the bus bar that connects the electronic unit that handles the boosted power and the motor-connecting AC connector. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic configuration diagram of a vehicle equipped with a power conversion device according to an embodiment of the present invention. [Figure 2] 1 is a circuit diagram showing a schematic electrical configuration of a step-up / step-down converter and an inverter included in a power conversion device according to an embodiment of the present invention. [Figure 3]1 is an exploded perspective view showing a schematic structural configuration of a power conversion device according to an embodiment of the present invention. [Figure 4] 1 is a schematic diagram of a power conversion device according to an embodiment of the present invention, with the upper cover of the main body case omitted. DETAILED DESCRIPTION OF THE INVENTION

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a power conversion device according to the present invention will be described below with reference to the drawings.

[0011] Fig. 1 is a schematic configuration diagram of a vehicle 100 equipped with a power conversion device 1 according to the present embodiment. The vehicle 100 is, for example, an electric vehicle or a hybrid vehicle. As shown in Fig. 1, the vehicle 100 includes, for example, a high-voltage battery HB, a low-voltage battery LB, a motor M, and the power conversion device 1 according to the present embodiment.

[0012] The high-voltage battery HB is a secondary battery such as a lithium-ion battery, and outputs relatively high-voltage DC power of, for example, several hundred volts. This high-voltage battery HB is a battery that outputs driving power to be supplied to the motor M, and is a so-called driving battery. The low-voltage battery LB is a secondary battery such as a lead-acid battery, and outputs relatively low-voltage DC power of, for example, about 12 V. This low-voltage battery LB is a battery that outputs auxiliary power to be supplied to auxiliary devices (not shown), and is a so-called auxiliary device battery.

[0013] The motor M generates rotational power by receiving drive power from the high-voltage battery HB via the power conversion device 1. The rotational power generated by the motor M is transmitted to the drive wheels of the vehicle 100 via a transmission mechanism (not shown). In this embodiment, the motor M includes a first motor M1 and a second motor M2. For example, the first motor M1 generates power supplied to the front wheels of the vehicle 100. Furthermore, for example, the second motor M2 generates power supplied to the rear wheels of the vehicle 100.

[0014] The power conversion device 1 of this embodiment is a device that performs power conversion. For example, the power conversion device 1 converts DC power to AC power, AC power to DC power, and voltage. Specifically, the power conversion device 1 of this embodiment boosts the drive power output from the high-voltage battery HB and converts it to AC, and supplies it to the motor M. The power conversion device 1 of this embodiment also converts the regenerative power output from the motor M to DC, reduces the voltage, and supplies it to the high-voltage battery HB. Furthermore, the power conversion device 1 of this embodiment reduces the voltage of the drive power output from the high-voltage battery HB to generate power for auxiliary devices, and supplies it to the low-voltage battery LB.

[0015] 1, a power conversion device 1 of this embodiment includes a step-up / step-down converter 2, an inverter 3, and a DC-DC converter 4. The step-up / step-down converter 2, the inverter 3, and the DC-DC converter 4 form a power conversion circuit H that performs power conversion. The power conversion circuit H boosts the power supplied from, for example, a high-voltage battery HB, and outputs the power to a motor M.

[0016] The buck-boost converter 2 boosts or lowers the voltage of electric power. For example, the buck-boost converter 2 boosts the drive power supplied from the high-voltage battery HB and outputs it to the inverter 3. The buck-boost converter 2 also lowers the regenerative power supplied from the inverter 3 and outputs it to the high-voltage battery HB.

[0017] The inverter 3 converts DC power to AC power or AC power to DC power. For example, the inverter 3 converts DC driving power supplied from the step-up / step-down converter 2 into three-phase AC power and outputs it to the motor M. The inverter 3 also converts AC regenerative power supplied from the motor M into DC power and outputs it to the high-voltage battery HB. In this embodiment, the inverter 3 includes a first inverter 3a and a second inverter 3b. The first inverter 3a is connected to the first motor M1. The second inverter 3b is connected to the second motor M2.

[0018] The DC-DC converter 4 converts the drive power output from the high-voltage battery HB into power for the auxiliary devices by stepping down the voltage. The DC-DC converter 4 converts the drive power, which is DC, into power for the auxiliary devices.

[0019] Fig. 2 is a circuit diagram showing a schematic electrical configuration of the step-up / step-down converter 2 and the inverter 3. As shown in Fig. 2, the power conversion device 1 of this embodiment includes the step-up / step-down converter 2 and the inverter 3, which are connected to each other.

[0020] The step-up / step-down converter 2 includes two power devices D, two capacitors C, and a reactor L. One of the two capacitors C (hereinafter referred to as the first capacitor C1) stores power before boosting when power is supplied from the high-voltage battery HB to the motor M. The other of the two capacitors C (hereinafter referred to as the second capacitor C2) stores power after boosting when power is supplied from the high-voltage battery HB to the motor M. Note that the first capacitor C1 and the second capacitor C2 are not limited to being formed by a single element. The first capacitor C1 may be formed by using a plurality of elements, and the second capacitor C2 may be formed by using a plurality of elements.

[0021] Each inverter 3 includes three power devices D. Each power device D includes a power transistor. These power transistors include semiconductor elements and are mounted on an insulated circuit board. In this embodiment, one power device D includes two power transistors. However, a power device including a single power transistor may be included. In this case, four power devices are provided in the step-up / step-down converter 2, and six power devices are provided in the inverter 3. For example, each power transistor includes a plurality of semiconductor elements formed of, for example, SiC (silicon carbide). The power transistor may include semiconductor elements formed of other materials such as Si (silicon) or GaN (gallium nitride).

[0022] Fig. 3 is an exploded perspective view showing a schematic structural configuration of the power conversion device 1 of this embodiment. As shown in Fig. 3, the power conversion device 1 of this embodiment includes an intelligent power module 10, a main body case 11, a capacitor unit 12, a reactor unit 13 (electronic unit), a DC-DC converter unit 14 (electronic unit), a motor output connector 15, a DC-DC converter output connector 16 (output connector), a DC power connector 17, a low-voltage connector 18, and an internal bus bar 19.

[0023] In the following description, for convenience of explanation, the direction in which the DC-DC converter unit 14 and the like are positioned relative to a partition wall 31a of a center plate 31 (described later) of the main body case 11 is referred to as "upward," and the direction in which the intelligent power module 10 is positioned relative to a partition wall 31a of a center plate 31 (described later) of the main body case 11 is referred to as "downward." However, the installation posture of the power conversion device 1 can be changed.

[0024] The intelligent power module 10 includes a power module 20 (electronic unit), a gate driver board 21 (control board), an ECU board 22 (control board), etc. The power module 20 includes a plurality of power devices D having semiconductor elements, a resin power module case that houses these power devices D, etc. The power module 20 is an electronic unit (post-boost electronic unit) that handles the power boosted by the boost-buck converter 2.

[0025] The gate driver board 21 is a board on which a gate driver that generates drive signals for the step-up / step-down converter 2 and the inverter 3 formed by the power devices D is provided. Such a gate driver board 21 is stacked on the power module 20. The ECU board 22 is a board on which an ECU (Electronic Control Unit) that controls the gate driver board 21 is provided. This ECU board 22 is stacked on the gate driver board 21. Note that the gate driver board 21 and ECU board 22 may be integrated.

[0026] The gate driver board 21 and ECU board 22 are control boards that control the power module 20. That is, in this embodiment, the gate driver board 21 and ECU board 22 control an electronic unit (post-boost electronic unit) that handles the power boosted by the boost-buck converter 2. However, the gate driver board 21 and ECU board 22 are driven by low-voltage power supplied via the low-voltage connector 18.

[0027] Such an intelligent power module 10 includes a power device D that forms the step-up / step-down converter 2 and the inverter 3. In other words, the intelligent power module 10 forms at least a part of the step-up / step-down converter 2 and the inverter 3.

[0028] The main body case 11 is a case that houses the intelligent power module 10, the capacitor unit 12, the reactor unit 13, the DC-DC converter unit 14, etc. The main body case 11 includes an upper cover 30, a center plate 31 (support plate), and a lower cover 32. The upper cover 30, the center plate 31, and the lower cover 32 are formed so as to be separable in the vertical direction.

[0029] The upper cover 30 is a part that covers from above the DC-DC converter unit 14 and the reactor unit 13, which are fixed from above to the center plate 31. In other words, the upper cover 30 is fastened to the center plate 31 via bolts or the like (not shown).

[0030] The central plate 31 is a support plate located between the upper cover 30 and the lower cover 32. The central plate 31 includes a flat partition wall portion 31a and a surrounding wall portion 31b that is provided so as to surround the partition wall portion 31a from the side.

[0031] The partition wall 31a is disposed so that one surface (hereinafter referred to as the upper surface 31a1) faces upward and the other surface faces downward. Such a partition wall 31a supports, for example, the intelligent power module 10, the capacitor unit 12, the reactor unit 13, and the DC-DC converter unit 14. The partition wall 31a may directly support the intelligent power module 10, the capacitor unit 12, the reactor unit 13, and the DC-DC converter unit 14, or may indirectly support them via other portions.

[0032] In this embodiment, the reactor unit 13 and the DC-DC converter unit 14 are arranged above the partition wall 31a. Also, in this embodiment, the intelligent power module 10 is arranged below the partition wall 31a. Also, in this embodiment, a portion of the capacitor unit 12 is provided so as to penetrate the partition wall 31a in the vertical direction. Therefore, the partition wall 31a is provided with an insertion opening 31c through which the capacitor unit 12 is inserted.

[0033] The intelligent power module 10, the capacitor unit 12, the reactor unit 13, and the DC-DC converter unit 14 are fastened to bosses or the like provided on the partition wall portion 31a by bolts or the like.

[0034] A flow path for guiding a coolant is provided inside the partition wall 31a. By flowing the coolant through this flow path, the partition wall 31a functions as a cooling jacket, and the intelligent power module 10, the capacitor unit 12, the reactor unit 13, and the DC-DC converter unit 14 are cooled.

[0035] The surrounding wall portion 31b is provided so as to surround the intelligent power module 10, the capacitor unit 12, the reactor unit 13, and the DC-DC converter unit 14 from the sides. The surrounding wall portion 31b is connected to the edge of the partition wall portion 31a and is provided so as to protrude upward and downward from the partition wall portion 31a. The upper end of the surrounding wall portion 31b is abutted against the upper cover 30. The lower end of the surrounding wall portion 31b is abutted against the lower cover 32.

[0036] The lower cover 32 is a part that covers from below the intelligent power module 10 that is fixed from below to the central plate 31. The lower cover 32 also covers from below the capacitor unit 12. The lower cover 32 is fastened to the central plate 31 via bolts or the like (not shown).

[0037] The lower cover 32 also has an opening 32a for exposing the motor output connector 15. The motor-side connector is attached to the motor output connector 15 through the opening 32a.

[0038] The capacitor unit 12 is connected to the intelligent power module 10 and is disposed to the side of the power module 20. The capacitor unit 12 is a unit including a capacitor C provided in the step-up / step-down converter 2. The capacitor unit 12 includes elements that form the capacitor C and a housing that covers these elements.

[0039] In this embodiment, capacitor unit 12 has a first capacitor C1 that stores power before boosting and a second capacitor C2 that stores power after boosting. In capacitor unit 12, the elements that form first capacitor C1 are arranged inside capacitor unit 12 so as to be located above partition wall 31a. In addition, the elements that form second capacitor C2 are arranged inside capacitor unit 12 so as to be located below partition wall 31a.

[0040] That is, in this embodiment, capacitor unit 12 has a first capacitor C1 and a second capacitor C2, and is arranged to penetrate partition wall 31a from above to below partition wall 31a. Furthermore, first capacitor C1, which stores power before boosting, is arranged above partition wall 31a, and second capacitor C2, which stores power after boosting, is arranged below partition wall 31a.

[0041] The reactor unit 13 is fixed to the center plate 31. This reactor unit 13 is connected to the intelligent power module 10 via a bus bar (not shown), and in this embodiment, is disposed above the center plate 31. The reactor unit 13 is a unit that includes a reactor L provided in the boost / buck converter 2. The reactor unit 13 is an electronic unit that handles power before boosting (pre-boost electronic unit), and is disposed above the partition wall portion 31a.

[0042] The DC-DC converter unit 14 is fixed to the center plate 31. This DC-DC converter unit 14 is connected to the intelligent power module 10 via a bus bar (not shown), and in this embodiment, is disposed above the center plate 31. The DC-DC converter unit 14 is a unit that forms the DC-DC converter 4 shown in FIG. 1. The DC-DC converter unit 14 is an electronic unit that handles power before boosting (pre-boost electronic unit), and is disposed above the partition wall portion 31a.

[0043] The motor output connector 15 is a unit to which the motor-side connector is connected. In this embodiment, the motor output connector 15 is disposed below the partition wall portion 31a of the center plate 31. The motor output connector 15 is also disposed further below the intelligent power module 10. The motor output connector 15 is connected to the power module 20 via a motor connection bus bar 40.

[0044] The DC-DC converter output connector 16 is a connector for outputting the power output from the DC-DC converter 4 to auxiliary devices and the like outside the power conversion device 1. The DC-DC converter output connector 16 is provided on the surrounding wall portion 31b of the center plate 31. In this embodiment, the DC-DC converter unit 14 is disposed above the partition wall portion 31a. Like the DC-DC converter unit 14, the DC-DC converter output connector 16 is also disposed above the partition wall portion 31a.

[0045] The DC power connector 17 is a connector that is connected to the high-voltage battery HB. The DC power connector 17 is provided on the surrounding wall portion 31b of the center plate 31. In this embodiment, the DC power connector 17 is disposed above the partition wall portion 31a.

[0046] 4 is a schematic diagram of the main body case 11 without the top cover 30. As shown in this figure, in a plan view, the DC-DC converter unit 14 is located farther from the DC power connector 17 than the reactor unit 13. In other words, in the power conversion device 1 of this embodiment, the DC-DC converter unit 14, which handles a lower voltage than the reactor unit 13, is located farther from the DC power connector 17 than the reactor unit 13.

[0047] In this embodiment, the power conversion device 1 is mounted on the vehicle 100 so that the reactor unit 13 is located at the rear of the vehicle 100 and the DC-DC converter unit 14 is located at the front of the vehicle 100. The vertical thickness of the DC-DC converter unit 14 located at the front of the vehicle 100 is smaller than the vertical thickness of the reactor unit 13 located at the rear of the vehicle 100. Therefore, the upper cover 30 can be formed to have an inclined surface 30a (see FIG. 3 ) such that the thickness of the power conversion device 1 gradually decreases from the rear of the vehicle to the front of the vehicle. In general, the power conversion device 1 is disposed below a curved hood of the vehicle. The inclined surface 30a of the upper cover 30 can suppress interference between the power conversion device 1 and the hood, making it easier to horizontally dispose the power conversion device 1 below the hood.

[0048] The low-voltage connector 18 is a connector for supplying low-voltage power to the gate driver board 21 and the ECU board 22. The low-voltage connector 18 is provided on the surrounding wall portion 31b of the center plate 31. In this embodiment, the gate driver board 21 and the ECU board 22 are arranged below the partition wall portion 31a. The low-voltage connector 18, like the gate driver board 21 and the ECU board 22, is also arranged below the partition wall portion 31a.

[0049] 4, the internal bus bar 19 is disposed inside the main body case 11 (above the upper surface 31a1 of the partition wall 31a) and is a strip-shaped conductor that connects the DC power connector 17 with the capacitor unit 12, the reactor unit 13, and the DC-DC converter unit 14. In other words, the capacitor unit 12, the reactor unit 13, and the DC-DC converter unit 14 are connected to the high-voltage battery HB via the DC power connector 17.

[0050] In the power conversion device 1 of this embodiment, the DC power supply connector 17 is connected to the high-voltage battery HB, and DC power is supplied from the high-voltage battery HB. The power conversion device 1 boosts the DC power using the step-up / step-down converter 2, converts the DC power to AC using the inverter 3, and supplies the AC power to the motors M. The power conversion device 1 also converts regenerative power supplied from each motor M into DC power using the inverter 3, and then reduces the voltage using the step-up / step-down converter 2 and supplies the DC power to the high-voltage battery HB. The power conversion device 1 of this embodiment also reduces the DC power supplied from the high-voltage battery HB using the DC-DC converter 4, and supplies the DC power to the low-voltage battery LB.

[0051] The power conversion device 1 of this embodiment as described above includes a plurality of electronic units (in this embodiment, a reactor unit 13, a DC-DC converter unit 14, and a power module 20) that form a power conversion circuit H that boosts the power supplied from the high-voltage battery HB and outputs the boosted power to the motor M. The power conversion device 1 of this embodiment also includes a center plate 31 having a flat partition wall portion 31a that supports the plurality of electronic units, and a motor output connector 15 to which the motor M is connected. A pre-boost electronic unit (in this embodiment, the reactor unit 13 and the DC-DC converter unit 14) that handles the power before boosting is disposed above the partition wall portion 31a. A post-boost electronic unit (in this embodiment, the power module 20) that handles the power after boosting is disposed below the partition wall portion 31a.

[0052] According to the power conversion device 1 of this embodiment, the motor output connector 15 and the post-boost electronic unit, which is an electronic unit that handles the boosted power, are arranged below the bulkhead 31a. Therefore, in the power conversion device 1 of this embodiment, the motor output connector 15 and the post-boost electronic unit can be arranged close to each other, and the length of the motor connection bus bar 40 can be shortened.

[0053] Moreover, in the power conversion device 1 of this embodiment, one of the pre-boost electronic units is the DCDC converter unit 14. Moreover, in the power conversion device 1 of this embodiment, the post-boost electronic unit is the power module 20. According to the power conversion device 1 of this embodiment, in the power conversion device 1 including the DCDC converter unit 14 and the power module 20, it is possible to shorten the motor connecting bus bar 40.

[0054] Furthermore, in the power conversion device 1 of this embodiment, the DC-DC converter output connector 16 is disposed above the partition wall 31a. According to the power conversion device 1 of this embodiment, the DC-DC converter unit 14 and the DC-DC converter output connector 16 can be disposed close to each other. Therefore, the wiring path connecting the DC-DC converter unit 14 and the DC-DC converter output connector 16 can be shortened.

[0055] Furthermore, in the power conversion device 1 of this embodiment, the power conversion circuit H has a first capacitor C1 that stores power before boosting and a second capacitor C2 that stores power after boosting. The power conversion device 1 of this embodiment also includes a capacitor unit 12 that has the first capacitor C1 and the second capacitor C2 and is arranged to penetrate the partition wall 31a from above to below the partition wall 31a. The capacitor unit 12 is arranged so that the first capacitor C1 is located above the partition wall 31a and the second capacitor C2 is located below the partition wall 31a.

[0056] According to the power conversion device 1 of this embodiment, the first capacitor C1 and the second capacitor C2 can be integrated into one unit. The first capacitor C1, which stores power at a lower voltage than the second capacitor C2, can be accommodated in the space above the partition wall 31a, similar to the reactor unit 13 and the DC-DC converter unit 14 that handle relatively low-voltage power. The second capacitor C2, which stores power at a higher voltage than the first capacitor C1, can be accommodated in the space below the partition wall 31a, similar to the power module 20 that handles relatively high-voltage power. This allows components that handle relatively low-voltage power and components that handle relatively high-voltage power to be arranged separately.

[0057] The power conversion device 1 of this embodiment also includes, as pre-boost electronic units, a DC-DC converter unit 14 and a reactor unit 13. The DC-DC converter unit 14 has a smaller thickness in the up-down direction than the reactor unit 13, and is disposed further forward of the vehicle 100 than the reactor unit 13 when mounted on the vehicle 100.

[0058] According to the power conversion device 1 of this embodiment, even when it is placed under a curved hood of a vehicle, interference with the hood can be suppressed, and it is easy to place it horizontally under the hood.

[0059] In the power conversion device 1 of this embodiment, the gate driver board 21 and ECU board 22 that control the boosted electronic unit are arranged below the partition wall 31a. The gate driver board 21 and ECU board 22 that control the boosted electronic unit are also arranged below the partition wall 31a. The low-voltage connector 18 that supplies power to the gate driver board 21 and ECU board 22 is also arranged below the partition wall 31a.

[0060] According to the power conversion device 1 of this embodiment, the low-voltage connector 18 can be disposed close to the gate driver board 21 and the ECU board 22. Therefore, the wiring path connecting the low-voltage connector 18 and the gate driver board 21 and the wiring path connecting the low-voltage connector 18 and the ECU board 22 can be shortened.

[0061] While the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to the above-described embodiments. The shapes and combinations of the components shown in the above-described embodiments are merely examples, and various modifications can be made based on design requirements, etc., without departing from the spirit of the present invention.

[0062] The above embodiment can also be described as follows, for example:

[0063] (Appendix 1) a plurality of electronic units forming a power conversion circuit that boosts the power supplied from the battery and outputs the boosted power to the motor; a support plate having a flat partition wall portion for supporting a plurality of the electronic units; a motor connecting AC connector to which the motor is connected; Equipped with a pre-boost electronic unit, which is the electronic unit that handles power before boosting, is disposed above the partition wall; The motor-connecting AC connector and the post-boost electronic unit, which is the electronic unit that handles the boosted power, are disposed below the partition wall. A power conversion device characterized by:

[0064] (Appendix 2) The pre-boost electronic unit is a DC-DC converter unit, The post-boost electronic unit is a power module 2. The power conversion device according to claim 1,

[0065] (Appendix 3) 3. The power module according to claim 2, wherein the output connector of the DC-DC converter unit is arranged above the partition wall.

[0066] (Appendix 4) the power conversion circuit has a first capacitor that stores power before boosting and a second capacitor that stores power after boosting, a capacitor unit including the first capacitor and the second capacitor and disposed so as to penetrate the partition wall from above to below the partition wall, The capacitor unit comprises: the first capacitor is located above the partition wall, The second capacitor is located below the partition wall. It is arranged as follows: 4. The power conversion device according to any one of claims 1 to 3.

[0067] (Appendix 5) The pre-boost electronic unit includes a DC-DC converter unit and a reactor unit, The DC-DC converter unit has a thickness dimension in the vertical direction smaller than that of the reactor unit, and is disposed further forward of the vehicle than the reactor unit when mounted on the vehicle. 5. The power conversion device according to any one of claims 1 to 4.

[0068] (Appendix 6) a control board for controlling the post-boost electronic unit is disposed below the partition wall; A low-voltage connector for supplying power to a control board that controls the post-boost electronic unit is disposed below the partition wall. 6. The power conversion device according to any one of claims 1 to 5. [Explanation of symbols]

[0069] 1...Power conversion device, 2...Step-up / down converter, 3...Inverter, 4...DCDC converter, 10...Intelligent power module, 11...Main body case, 12...Capacitor unit, 13...Reactor unit (electronic unit), 14...DCDC converter unit (electronic unit), 15...Motor output connector (AC connector for connecting motor), 16...DCDC converter output connector (output connector), 17...DC power connector, 18...Low voltage connector, 19...Internal busbar , 20... power module (electronic unit), 21... gate driver board (control board), 22... ECU board (control board), 30... upper cover, 30a... inclined surface, 31... center plate (support plate), 31a... partition wall portion, 31b... surrounding wall portion, 32... lower cover, 40... motor connection bus bar (bus bar), 100... vehicle, C... capacitor, D... power device, H... power conversion circuit, HB... high voltage battery (battery), L... reactor, LB... low voltage battery, M... motor

Claims

1. a plurality of electronic units forming a power conversion circuit that boosts the power supplied from the battery and outputs the boosted power to the motor; a support plate having a flat partition wall portion for supporting a plurality of the electronic units; a motor connecting AC connector to which the motor is connected; Equipped with a pre-boost electronic unit, which is the electronic unit that handles power before boosting, is disposed above the partition wall; The motor-connecting AC connector and the post-boost electronic unit, which is the electronic unit that handles the boosted power, are disposed below the partition wall. A power conversion device characterized by:

2. The pre-boost electronic unit is a DC-DC converter unit, The post-boost electronic unit is a power module 2. The power conversion device according to claim 1.

3. 3. The power conversion device according to claim 2, wherein an output connector of the DC-DC converter unit is disposed above the partition wall.

4. the power conversion circuit includes a first capacitor for storing power before boosting and a second capacitor for storing power after boosting; a capacitor unit including the first capacitor and the second capacitor and disposed so as to penetrate the partition wall from above to below the partition wall, The capacitor unit comprises: the first capacitor is located above the partition wall, The second capacitor is located below the partition wall. It is arranged as follows:

4. The power conversion device according to claim 1, wherein the power conversion device is a power conversion device having a first resistance and a second resistance.

5. The pre-boost electronic unit includes a DC-DC converter unit and a reactor unit, The DC-DC converter unit has a thickness dimension in the up-down direction smaller than that of the reactor unit, and is disposed forward of the vehicle relative to the reactor unit when mounted on the vehicle.

4. The power conversion device according to claim 1, wherein the power conversion device is a power conversion device having a first resistance and a second resistance.

6. a control board for controlling the post-boost electronic unit is disposed below the partition wall; A low-voltage connector for supplying power to a control board that controls the post-boost electronic unit is disposed below the partition wall.

4. The power conversion device according to claim 1, wherein the power conversion device is a power conversion device having a first resistance and a second resistance.

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