JP2020108250A - Power conversion equipment - Google Patents

Abstract

To provide power conversion equipment capable of suppressing generation of electrical connection failure.SOLUTION: The power conversion equipment includes: a filter 320 connected with a battery; a converter for converting a battery voltage supplied through a filter; and circuit bus bars 331 and 332 connecting the filter with the converter. The filter includes: coils 321 and 322 connected with the circuit bus bars; a filter housing 327 storing the coil; and a resin member 328 fixing the coil on the filter housing. The circuit bus bars are fixed on the filter housing.SELECTED DRAWING: Figure 4

Description

The disclosure described herein relates to a power conversion device having a filter.

As shown in Patent Document 1, there is known a power conversion device in which a converter and a heat generating component are mounted on a base plate. The heating component includes a filter capacitor.

JP, 2017-112768, A

In the power conversion device disclosed in Patent Document 1, when the converter and the filter capacitor (filter) vibrate separately, there is a possibility that an electrical connection failure may occur at the electrical connection site between the two.

Therefore, it is an object of the disclosure disclosed in the present specification to provide a power conversion device in which the occurrence of electrical connection failure is suppressed.

One of the disclosures is a filter (320) connected to a battery (200),
A converter (330) for converting the voltage of the battery supplied through the filter,
A circuit bus bar (331, 332) connecting the filter and the converter,
The filter includes a passive element (321, 322) connected to the circuit bus bar, a filter housing (327) that houses the passive element, and a resin member (328) that fixes the passive element to the filter housing,
The circuit bus bar is fixed to the filter housing.

One of the disclosures is a filter (320) connected to a battery (200),
A converter (330) for converting the voltage of the battery supplied through the filter,
A power supply bus bar (311, 312) connecting the battery and the filter, and a terminal block (310) including a bus bar housing (313) housing the power supply bus bar,
A circuit bus bar (331, 332) connecting the filter and the converter,
The filter has a passive element (321, 322) connected to each of the power supply bus bar and the circuit bus bar, and a resin member (328) for fixing the passive element to the bus bar housing,
The circuit bus bar is fixed to the bus bar housing.

One of the disclosures is a filter (320) connected to a battery (200),
A converter (330) for converting the voltage of the battery supplied through the filter,
A smoothing capacitor (351) connected to the battery, and a capacitor unit (350) including a capacitor housing (354) for housing the smoothing capacitor,
A circuit bus bar (331, 332) connecting the filter and the converter,
The filter has passive elements (321, 322) connected to the circuit bus bar, and a resin member (328) for fixing the passive elements to the capacitor housing,
The circuit bus bar is fixed to the capacitor housing.

One of the disclosures is a filter (320) connected to a battery (200),
A converter (330) for converting the voltage of the battery supplied through the filter,
A power supply bus bar (311, 312) connecting the battery and the filter, and a terminal block (310) including a bus bar housing (313) housing the power supply bus bar,
A circuit bus bar (331, 332) connecting the filter and the converter,
A smoothing capacitor (351) connected to the battery, and a capacitor unit (350) including a capacitor housing (354) for housing the smoothing capacitor,
The filter includes a passive element (321, 322) connected to each of the power supply bus bar and the circuit bus bar, a filter housing (327) that houses the passive element, and a resin member (328) that fixes the passive element to the filter housing. Have,
Each of the filter housing and the circuit bus bar is fixed to the bus bar housing or the capacitor housing.

In this way, the passive elements (321, 322) and the circuit bus bars (331, 332) are fixed to the housing. Therefore, the passive elements (321, 322) and the circuit bus bars (331, 332) are suppressed from separately vibrating. The application of stress to the connection points between the passive elements (321, 322) and the circuit bus bars (331, 332) is suppressed. The occurrence of electrical connection failure at the connection portion between the passive elements (321, 322) and the circuit bus bar (331, 332) is suppressed.

Note that the reference numbers in the above parentheses only show the correspondence with the configurations described in the embodiments described later, and do not limit the technical scope in any way.

It is a block diagram showing a schematic structure of an in-vehicle system. It is a schematic diagram which shows schematic structure of a power converter device. It is sectional drawing which shows the fixed state of the filter of the power converter device which concerns on 1st Embodiment. It is a top view which shows the fixed state of the power supply bus bar and the circuit bus bar in 1st Embodiment. It is sectional drawing which shows the fixed state of the filter of the power converter device which concerns on 2nd Embodiment. It is a top view which shows the fixed state of the power supply bus bar and the circuit bus bar in 2nd Embodiment. It is sectional drawing which shows the fixed state of the filter of the power converter device which concerns on 3rd Embodiment. It is a top view which shows the fixed state of the power supply bus bar and the circuit bus bar in 3rd Embodiment. It is sectional drawing which shows the fixed state of the filter of the power converter device which concerns on 4th Embodiment. It is a top view which shows the fixed state of the power supply bus bar and the circuit bus bar in 4th Embodiment.

Hereinafter, embodiments will be described with reference to the drawings.

(First embodiment)
<In-vehicle system>
First, the in-vehicle system 100 provided with the power conversion device 300 will be described with reference to FIG. 1. This in-vehicle system 100 constitutes a system for an electric vehicle. The in-vehicle system 100 includes a battery 200, a power conversion device 300, and a motor 400.

The in-vehicle system 100 has a plurality of ECUs. The plurality of ECUs exchange signals with each other via bus wiring. A plurality of ECUs cooperate to control the electric vehicle. The power running and regeneration of the motor 400 according to the SOC of the battery 200 is controlled by the control of the plurality of ECUs. In FIG. 1, MGECU 340 is shown as a representative of a plurality of ECUs. MGECU 340 is included in power conversion device 300. SOC is an abbreviation for state of charge. ECU is an abbreviation for electronic control unit.

The battery 200 has a plurality of secondary batteries. The plurality of secondary batteries form a battery stack connected in series. The SOC of this battery stack corresponds to the SOC of the battery 200. As the secondary battery, a lithium ion secondary battery, a nickel hydrogen secondary battery, an organic radical battery or the like can be adopted.

The power conversion device 300 performs power conversion between the battery 200 and the motor 400. At the same time, the power conversion device 300 steps down the DC power of the battery 200. The power conversion device 300 supplies the reduced direct-current power to the in-vehicle device that consumes less power than the motor 400 such as the MGECU 340.

The motor 400 is connected to the output shaft of an electric vehicle (not shown). The rotation energy of the motor 400 is transmitted to the running wheels of the electric vehicle via the output shaft. Conversely, the rotational energy of the running wheels is transmitted to the motor 400 via the output shaft.

The motor 400 runs by the AC power supplied from the power converter 300. As a result, propulsive force is applied to the running wheels. Further, the motor 400 is regenerated by the rotational energy transmitted from the traveling wheels. As a result, AC power is generated by the motor 400.

<Power converter>
Next, the power conversion device 300 will be described. As shown in FIGS. 1 and 2, the power conversion device 300 includes a terminal block 310, a filter 320, a converter 330, and an MGECU 340. The power conversion device 300 also includes a first capacitor unit 350, a second capacitor unit 360, an inverter 370, and a case 380. The terminal block 310, the filter 320, the converter 330, the MGECU 340, the first capacitor unit 350, the second capacitor unit 360, and the inverter 370 are housed in the case 380. Then, these stored items are fixed to the case 380 by bolts or the like.

As shown in a simplified manner in FIG. 2, the case 380 has a housing 381 and a connecting wall 382 connected to the inner wall of the housing 381. The forming material of each of the housing 381 and the connecting wall 382 is a metal such as aluminum.

The connection wall 382 is formed with a flow path for flowing the refrigerant. On the connecting wall 382, one of the components of the power conversion device 300 that is particularly prone to generate heat is mounted. Specifically, the converter 330, the first capacitor unit 350, the second capacitor unit 360, the inverter 370, etc. are mounted on the connecting wall 382. A configuration in which the MGECU 340 is mounted on the connecting wall 382 can also be adopted. Other components are appropriately fixed to the housing 381. In FIG. 2, the second capacitor unit 360 is shown in an overlapping manner with other components.

Converter 330 steps down the DC power supplied from battery 200 according to the required voltage of the on-vehicle device such as MGECU 340. The inverter 370 converts the DC power of the battery 200 into AC power. This AC power is supplied to the motor 400. The inverter 370 also converts the AC power generated by the motor 400 into DC power. Hereinafter, the electrical connection configuration of the power conversion device 300 will be described.

<Electrical connection configuration of power converter>
As shown in FIG. 1, the terminal block 310 has a first power supply bus bar 311 and a second power supply bus bar 312. The first power supply bus bar 311 is connected to the positive terminal of the battery 200. The second power bus bar 312 is connected to the negative terminal of the battery 200.

The filter 320 has a first coil 321 and a second coil 322 as passive elements for removing electromagnetic noise. The first coil 321 and the second coil 322 are magnetically coupled. A common mode noise filter is constituted by these two coils.

The first coil 321 has two terminals. An extension bus bar for extending the terminal length is welded to these two terminals. Specifically, the first extension bus bar 323 is welded to one of the two terminals of the first coil 321. The second extension bus bar 324 is welded to the other of the two terminals of the first coil 321. The first extension bus bar 323 and the second extension bus bar 324 may not be connected to the first coil 321.

The first power supply bus bar 311 is mechanically and electrically connected to the first extension bus bar 323. The first circuit bus bar 331 is mechanically and electrically connected to the second extension bus bar 324.

The second coil 322 has two terminals. An extension bus bar for extending the terminal length is also welded to these two terminals. Specifically, the third extension bus bar 325 is welded to one of the two terminals of the second coil 322. The fourth extension bus bar 326 is welded to the other of the two terminals of the second coil 322. The third extension bus bar 325 and the fourth extension bus bar 326 may not be connected to the second coil 322.

The second power supply bus bar 312 is mechanically and electrically connected to the third extension bus bar 325. The second circuit bus bar 332 is mechanically and electrically connected to the fourth extension bus bar 326.

The converter 330 has a circuit board in which electronic elements are mounted on a wiring board. The first circuit bus bar 331 and the second circuit bus bar 332 are mechanically and electrically connected to the circuit board.

With the electrical connection configuration described above, the battery 200 and the converter 330 are electrically connected via the first coil 321 and the second coil 322 that form the common mode noise filter. DC power of the battery 200 from which noise has been removed by the common mode noise filter is supplied to the converter 330.

Although not shown, the wiring board of the converter 330 includes a first power wiring electrically connected to the first circuit bus bar 331, a second power wiring electrically connected to the second circuit bus bar 332, and a second power wiring. The third power wiring has a higher potential than that.

The electronic element of the converter 330 has one or more phase legs connected in parallel between the third power wiring and the second power wiring. The one-phase leg has two switch elements connected in series between the third power wiring and the second power wiring.

The electronic elements of converter 330 also have the same number of reactors as legs. The reactor connects the middle point between the two switch elements included in the one-phase leg and the first power wiring. Two switch elements included in the leg are PWM-controlled by the above ECU and a gate driver (not shown). The DC power supplied from the battery 200 is stepped down by this PWM control.

The first capacitor unit 350 has a first capacitor 351, a first smoothing bus bar 352, and a second smoothing bus bar 353. As shown in FIG. 1, the first smoothing bus bar 352 is mechanically and electrically connected to the first power supply bus bar 311. The second smoothing bus bar 353 is mechanically and electrically connected to the second power source bus bar 312. The first smoothing bus bar 352 and the first power supply bus bar 311 may be integrated or separated. The second smoothing bus bar 353 and the second power source bus bar 312 may be integrated or separated.

The first capacitor 351 is connected between the first smoothing bus bar 352 and the second smoothing bus bar 353. One of the two electrodes of the first capacitor 351 is connected to the first smoothing bus bar 352. The other of the two electrodes provided in the first capacitor 351 is connected to the second smoothing bus bar 353. The first capacitor 351 corresponds to a smoothing capacitor.

The second capacitor unit 360 has a second capacitor 361, a third smoothing bus bar 362, and a fourth smoothing bus bar 363. The third smoothing bus bar 362 is mechanically and electrically connected to the first smoothing bus bar 352. The fourth smoothing bus bar 363 is mechanically and electrically connected to the second smoothing bus bar 353. The first smoothing bus bar 352 and the third smoothing bus bar 362 may be integrated or separated. The second smoothing bus bar 353 and the fourth smoothing bus bar 363 may be integrated or separated.

The second capacitor 361 is connected between the third smoothing bus bar 362 and the fourth smoothing bus bar 363. One of the two electrodes of the second capacitor 361 is connected to the third smoothing bus bar 362. The other of the two electrodes of the second capacitor 361 is connected to the fourth smoothing bus bar 363.

The third smoothing bus bar 362 and the fourth smoothing bus bar 363 are mechanically and electrically connected to the inverter 370.

With the connection configuration described above, the first capacitor 351, the second capacitor 361, and the inverter 370 are electrically connected to the battery 200. The DC power of the battery 200 is supplied to each of the first capacitor 351, the second capacitor 361, and the inverter 370.

The power conversion device 300 may not have both the first capacitor unit 350 and the second capacitor unit 360. It is also possible to adopt a configuration in which the power conversion device 300 has only the first capacitor unit 350.

The inverter 370 has three or more legs connected in parallel between the third smoothing bus bar 362 and the fourth smoothing bus bar 363. Each of these three-phase or more legs has two switching elements connected in series. A bus bar is connected to the midpoint between these two switch elements. The bus bar is electrically connected to the stator coil of the motor 400. The switch element is PWM-controlled by the ECU and the gate driver. Thereby, the DC power supplied from the battery 200 is converted into AC power. AC power generated by regeneration (power generation) in the motor 400 is converted into DC power.

The inverter 370 of this embodiment has a cooling body for cooling the plurality of switch elements, in addition to the plurality of switch elements described above. The cooling body has a coolant supply pipe, a coolant discharge pipe, and a plurality of relay pipes that interconnect and relay the coolant supply pipe and the coolant discharge pipe. Refrigerant flows through these three tubes. The coolant flows from the coolant supply pipe to the coolant discharge pipe through the plurality of relay pipes.

The coolant supply pipe and the coolant discharge pipe extend in the same direction. Each of the plurality of relay pipes extends from the coolant supply pipe toward the coolant discharge pipe. The plurality of relay pipes are spaced apart and arranged in the direction in which the refrigerant supply pipe and the refrigerant discharge pipe extend.

An air gap is formed between two adjacent relay pipes. The switch element is provided in this gap. The switch element is in contact with the relay pipe. The heat generated in the switch element is radiated to the refrigerant via the relay pipe.

In addition, as the switch element described so far, an IGBT, a MOSFET, or the like can be adopted. As a material for forming the switch element, a semiconductor such as Si and a wide gap semiconductor such as SiC can be adopted.

<Mechanical connection of power converter>
Next, a mechanical connection configuration of the power conversion device 300 will be described. The terminal block 310 has a bus bar housing 313 that houses the first power supply bus bar 311 and the second power supply bus bar 312 described above. The bus bar housing 313 is made of an insulating resin material. The bus bar housing 313 is fixed to the housing 381 with bolts or the like.

The filter 320 has a filter housing 327 that houses the first coil 321 and the second coil 322 described above. The filter housing 327 is made of an insulating resin material. As shown in FIG. 3, the filter housing 327 is fixed to the housing 381 with bolts or the like.

As shown in FIGS. 3 and 4, the filter housing 327 has a second recess 327a that is locally recessed. The first coil 321 and the second coil 322 are provided in the second recess 327a. The first coil 321 and the second coil 322 are fixed to the filter housing 327 in the second recess 327a by an insulating resin member 328, respectively. At least a part of the portions of the first coil 321 and the second coil 322 excluding the welded joint portions with the bus bars is embedded in the resin member 328. The first extension bus bar 323 to the fourth extension bus bar 326, which extend the respective terminals of the first coil 321 and the second coil 322, are located outside the resin member 328.

As shown in FIG. 4, the first extension bus bar 323 and the first power supply bus bar 311 are mechanically and electrically connected by the first bolt 391. At the same time, the first extension bus bar 323 and the first power supply bus bar 311 are mechanically connected (fixed) to the first capacitor housing 354 by the first bolt 391.

The second extension bus bar 324 and the first circuit bus bar 331 are mechanically and electrically connected by the second bolt 392. At the same time, the second extension bus bar 324 and the first circuit bus bar 331 are fixed to the filter housing 327 by the second bolt 392.

Similarly, the third extension bus bar 325 and the second power supply bus bar 312 are mechanically and electrically connected by the third bolt 393. At the same time, the third extension bus bar 325 and the second power supply bus bar 312 are fixed to the first capacitor housing 354 by the third bolt 393.

The fourth extension bus bar 326 is mechanically and electrically connected to the second circuit bus bar 332 by the fourth bolt 394. At the same time, the fourth extension bus bar 326 and the second circuit bus bar 332 are fixed to the filter housing 327 by the fourth bolt 394. In FIG. 1, each of the first bolt 391 to the fourth bolt 394 is indicated by a white circle.

It is also possible to employ a configuration in which the extension bus bar and the power supply bus bar are connected by bolts, and a part of them is mechanically and electrically joined by welding or the like. In this case, the extension bus bar and the power supply bus bar do not have to be electrically connected by a bolt.

Similarly, the extension bus bar and the circuit bus bar may be connected by bolts, and a part of them may be mechanically and electrically joined by welding or the like. In this case, the extension bus bar and the circuit bus bar may not be electrically connected by the bolt.

The first capacitor unit 350 has a first capacitor housing 354 that houses the above-described first capacitor 351, first smoothing bus bar 352, and second smoothing bus bar 353. The first capacitor housing 354 is made of an insulating resin material. Part of each of the first smoothing bus bar 352 and the second smoothing bus bar 353 is insert-molded in the first capacitor housing 354. The first capacitor housing 354 is fixed to the connecting wall 382 with bolts or the like. Further, as described above, in this embodiment, the first extension bus bar 323 and the first power supply bus bar 311 and the third extension bus bar 325 and the second power supply bus bar 312 are bolted to the first capacitor housing 354.

Similarly to the first capacitor unit 350, the second capacitor unit 360 also has a second capacitor housing 364 made of an insulating resin material. As schematically shown in FIG. 2, the second capacitor unit 360 is larger in size than the first capacitor unit 350.

Due to the circuit configuration shown in FIG. 1, the second capacitor unit 360 becomes easier to be arranged farther from the terminal block 310 than the first capacitor unit 350. Therefore, the first extension bus bar 323 and the third extension bus bar 325 are bolted to the first capacitor housing 354 instead of the second capacitor housing 364.

<Effect>
Next, the function and effect of the power conversion device 300 will be described. As described above, the first coil 321 and the second coil 322 are fixed to the filter housing 327. The first circuit bus bar 331 and the second circuit bus bar 332 connected to the first coil 321 and the second coil 322 are fixed to the filter housing 327.

Therefore, the first coil 321 and the first circuit bus bar 331 are suppressed from separately vibrating due to external force such as vibration of the vehicle. Similarly, the second coil 322 and the second circuit bus bar 332 are suppressed from separately vibrating. This suppresses the stress application to the connection part between the first coil 321 and the first circuit bus bar 331 and the connection part between the second coil 322 and the second circuit bus bar 332. The occurrence of electrical connection failure at the connection between the coil and the circuit bus bar is suppressed.

As described above, the first coil 321 and the second coil 322 are fixed to the filter housing 327. The first power supply bus bar 311 connected to the first coil 321 and the second power supply bus bar 312 connected to the second coil 322 are fixed to the first capacitor housing 354. The filter housing 327 and the first capacitor housing 354 are fixed to the case 380.

Thus, the filter housing 327 and the first capacitor housing 354 are indirectly connected via the case 380. Therefore, the first coil 321 and the first power source bus bar 311 are suppressed from separately vibrating due to an external force such as vibration of the vehicle. Similarly, the second coil 322 and the second power source bus bar 312 are suppressed from separately vibrating. As a result, the stress application is suppressed at the connection portion between the first coil 321 and the first power supply bus bar 311 and the connection portion between the second coil 322 and the second power supply bus bar 312, respectively. The occurrence of electrical connection failure at the connection between the coil and the power supply bus bar is suppressed.

In addition, in order to more effectively suppress the vibration of the coil and the power supply busbar separately, a configuration in which the filter housing 327 and the first capacitor housing 354 are directly connected by fitting or the like may be adopted. it can. The form of connection between the two is not particularly limited.

In this embodiment, the first power supply bus bar 311 and the second power supply bus bar 312 are fixed to the first capacitor housing 354. However, the first power supply bus bar 311 and the second power supply bus bar 312 may be fixed to the filter housing 327. It is also possible to adopt a configuration in which the first power supply bus bar 311 and the second power supply bus bar 312 are fixed to the bus bar housing 313.

As described above, the converter 330 is a circuit board in which electronic elements are mounted on the wiring board. The filter 320 is not mounted on this wiring board. Therefore, the physique of the passive element included in the filter 320 can be determined regardless of the physique and rigidity of the wiring board.

(Second embodiment)
Next, a second embodiment will be described based on FIGS. 5 and 6. The power conversion devices according to the embodiments described below have many common points with those according to the above-described embodiments. Therefore, in the following, description of common parts will be omitted, and different parts will be mainly described. Further, in the following, the same reference numerals are given to the same elements as those shown in the above embodiment.

In the first embodiment, the filter 320 has the filter housing 327, and the filter housing 327 stores the first coil 321 and the second coil 322. On the other hand, in this embodiment, the first coil 321 and the second coil 322 are housed in the bus bar housing 313.

As shown in FIGS. 5 and 6, the bus bar housing 313 is formed with a first recess 313a that is locally recessed. The first coil 321 and the second coil 322 are provided in the first recess 313a. The first coil 321 and the second coil 322 are fixed to the bus bar housing 313 in the first recess 313a by a resin member 328, respectively.

As shown in FIG. 6, the first extension bus bar 323 and the first power supply bus bar 311 are mechanically connected (fixed) to the bus bar housing 313 by the first bolt 391. The second extension bus bar 324 and the first circuit bus bar 331 are fixed to the bus bar housing 313 by the second bolt 392.

Similarly, the third extension bus bar 325 and the second power supply bus bar 312 are fixed to the bus bar housing 313 by the third bolt 393. The fourth extension bus bar 326 and the second circuit bus bar 332 are fixed to the bus bar housing 313 by the fourth bolt 394.

As described above, the first coil 321 and the second coil 322 are fixed to the bus bar housing 313. The first circuit bus bar 331 and the first power supply bus bar 311 connected to the first coil 321 and the second circuit bus bar 332 and the second power supply bus bar 312 connected to the second coil 322 are fixed to the bus bar housing 313. ing.

Therefore, the first coil 321, the first circuit bus bar 331, and the first power supply bus bar 311 are suppressed from individually vibrating due to external force such as vibration of the vehicle. Similarly, the second coil 322, the second circuit bus bar 332, and the second power supply bus bar 312 are suppressed from individually vibrating. This suppresses the stress application to the connection part between the first coil 321 and the first circuit bus bar 331 and the connection part between the first coil 321 and the first power supply bus bar 311. The application of stress to the connection part between the second coil 322 and the second circuit bus bar 332 and the connection part between the second coil 322 and the second power supply bus bar 312 is suppressed. As a result, it is possible to suppress the occurrence of electrical connection failure at each of the connection portion between the coil and the circuit bus bar and the connection portion between the coil and the power supply bus bar.

The power conversion device 300 according to this embodiment includes the same components as the power conversion device 300 described in the first embodiment. Therefore, it goes without saying that the same operational effect is achieved. The same applies to each of the following embodiments and modified examples.

(Third Embodiment)
Next, a third embodiment will be described based on FIGS. 7 and 8.

The second embodiment has shown the example in which the first coil 321 and the second coil 322 are housed in the bus bar housing 313. On the other hand, in the present embodiment, the first coil housing 354 accommodates the first coil 321 and the second coil 322.

As shown in FIGS. 7 and 8, the first capacitor housing 354 has a locally recessed third recess 354a. The first coil 321 and the second coil 322 are provided in the third recess 354a. The first coil 321 and the second coil 322 are fixed to the first capacitor housing 354 in the third recess 354a by an insulating resin member 328, respectively.

As shown in FIG. 8, the first extension bus bar 323 and the first power supply bus bar 311 are mechanically connected (fixed) to the first capacitor housing 354 by the first bolt 391. The second extension bus bar 324 and the first circuit bus bar 331 are fixed to the first capacitor housing 354 by the second bolt 392.

Similarly, the third extension bus bar 325 and the second power supply bus bar 312 are fixed to the first capacitor housing 354 by the third bolt 393. The fourth extension bus bar 326 and the second circuit bus bar 332 are fixed to the first capacitor housing 354 by the fourth bolt 394.

As described above, the first coil 321 and the second coil 322 are fixed to the first capacitor housing 354. Then, the first circuit bus bar 331 and the first power supply bus bar 311 connected to the first coil 321 and the second circuit bus bar 332 and the second power supply bus bar 312 connected to the second coil 322 are respectively provided in the first capacitor housing 354. It is fixed.

Therefore, similarly to the power conversion device 300 of the second embodiment, in the power conversion device 300 of the present embodiment, the electrical connection between the coil and the circuit bus bar and the electrical connection between the coil and the power supply bus bar are performed. The occurrence of poor connection is suppressed.

(Fourth Embodiment)
Next, a fourth embodiment will be described based on FIGS. 9 and 10.

The third embodiment has shown the example in which the first coil 321 and the second coil 322 are housed in the first capacitor housing 354. On the other hand, in the present embodiment, the first coil 321 and the second coil 322 are housed in the filter housing 327. The filter housing 327 is fixed to the first capacitor housing 354.

The first coil 321 and the second coil 322 are provided in the second recess 327a of the filter housing 327, as in the first embodiment. The first coil 321 and the second coil 322 are fixed to the filter housing 327 in the second recess 327a by the resin member 328.

As shown in FIGS. 9 and 10, the filter housing 327 is fixed to the first capacitor housing 354 by bolts or the like. The first extension bus bar 323 and the first power supply bus bar 311 are mechanically connected (fixed) to the first capacitor housing 354 by the first bolt 391. The second extension bus bar 324 and the first circuit bus bar 331 are fixed to the first capacitor housing 354 by the second bolt 392.

The third extension bus bar 325 and the second power supply bus bar 312 are fixed to the first capacitor housing 354 by the third bolt 393. The fourth extension bus bar 326 and the second circuit bus bar 332 are fixed to the first capacitor housing 354 by the fourth bolt 394.

As described above, the filter housing 327 that houses the first coil 321 and the second coil 322 is fixed to the first capacitor housing 354. The first circuit bus bar 331 and the first power supply bus bar 311 and the second circuit bus bar 332 and the second power supply bus bar 312 are fixed to the first capacitor housing 354.

Therefore, for example, similarly to the power conversion device 300 of the third embodiment, in the power conversion device 300 of the present embodiment, electricity at the connection part between the coil and the circuit bus bar, and at the connection part between the coil and the power supply bus bar, respectively. Occurrence of defective connection is suppressed.

In this embodiment, the filter housing 327, the first power supply bus bar 311, the second power supply bus bar 312, the first circuit bus bar 331, and the second circuit bus bar 332 are fixed to the first capacitor housing 354. However, the filter housing 327, the first power supply bus bar 311, the second power supply bus bar 312, the first circuit bus bar 331, and the second circuit bus bar 332 may be fixed to the bus bar housing 313.

Although the preferred embodiment of the present disclosure has been described above, the present disclosure is not limited to the above-described embodiment and can be variously modified and implemented without departing from the gist of the present disclosure.

(Other modifications)
In each embodiment, an example is shown in which various components of the power conversion device 300 are bolted. The fastening direction of each of the plurality of bolts is the same. Particularly, the fastening direction of the bolt to the case 380 of the inverter 370 and the fastening direction of each of the first bolt 391 to the fourth bolt 394 are the same. By making the fastening directions the same, the bolting work is facilitated.

In each embodiment, the example in which the power conversion device 300 is included in the in-vehicle system 100 for an electric vehicle has been shown. However, the application of the power conversion device 300 is not particularly limited to the above example. For example, a configuration in which the power conversion device 300 is included in a hybrid system including a motor and an internal combustion engine can be adopted.

In each embodiment, the power converter 300 is connected to one motor 400. However, it is also possible to adopt a configuration in which the power conversion device 300 is connected to the two motors 400. In this case, the power conversion device 300 includes two inverters 370.

100... In-vehicle system, 200... Battery, 300... Power converter, 310... Terminal block, 311... 1st power supply bus bar, 312... 2nd power supply bus bar, 313... Bus bar housing, 313a... 1st recessed part, 320... Filter, 321 ... 1st coil, 322... 2nd coil, 327... Filter housing, 327a... 2nd recessed part, 328... Resin member, 330... Converter, 331... 1st circuit bus bar, 332... 2nd circuit bus bar, 350... 1st capacitor Unit, 351... First capacitor, 354... First capacitor housing, 354a... Third recess, 380... Case, 400... Motor

Claims (13)

A filter (320) connected to the battery (200),
A converter (330) for converting the voltage of the battery supplied through the filter;
A circuit bus bar (331, 332) connecting the filter and the converter,
The filter includes passive elements (321, 322) connected to the circuit bus bar, a filter housing (327) that houses the passive element, and a resin member (328) that fixes the passive element to the filter housing. Have
A power converter in which the circuit bus bar is fixed to the filter housing. A power supply bus bar (311, 312) connecting the battery and the passive element,
A smoothing capacitor (351) connected to the battery, and a capacitor unit (350) including a capacitor housing (354) housing the smoothing capacitor,
A case (380) accommodating each of the filter, the converter, the circuit bus bar, the power supply bus bar, and the capacitor unit,
The power bus bar is fixed to the capacitor housing,
The power conversion device according to claim 1, wherein each of the filter housing and the capacitor housing is fixed to the case. The filter housing is formed with a locally recessed recess (327a),
The passive element is provided in the recess,
The power conversion device according to claim 1, wherein a part of the passive element is embedded in the resin member. A filter (320) connected to the battery (200),
A converter (330) for converting the voltage of the battery supplied through the filter;
A power supply bus bar (311, 312) connecting the battery and the filter, and a terminal block (310) including a bus bar housing (313) housing the power supply bus bar,
A circuit bus bar (331, 332) connecting the filter and the converter,
The filter includes a passive element (321, 322) connected to each of the power supply bus bar and the circuit bus bar, and a resin member (328) for fixing the passive element to the bus bar housing.
A power converter in which the circuit bus bar is fixed to the bus bar housing. The power converter according to claim 4, wherein the power supply bus bar is fixed to the bus bar housing. The bus bar housing is formed with a locally recessed portion (313a),
The passive element is provided in the recess,
The power conversion device according to claim 5, wherein a part of the passive element is embedded in the resin member. A filter (320) connected to the battery (200),
A converter (330) for converting the voltage of the battery supplied through the filter;
A smoothing capacitor (351) connected to the battery, and a capacitor unit (350) including a capacitor housing (354) housing the smoothing capacitor,
A circuit bus bar (331, 332) connecting the filter and the converter,
The filter has passive elements (321, 322) connected to the circuit bus bar, and a resin member (328) for fixing the passive element to the capacitor housing,
A power converter in which the circuit bus bar is fixed to the capacitor housing. A power supply bus bar (311, 312) connecting the battery and the passive element,
The power converter according to claim 7, wherein the power supply bus bar is fixed to the capacitor housing. A locally recessed recess (354a) is formed in the capacitor housing,
The passive element is provided in the recess,
The power conversion device according to claim 7, wherein a part of the passive element is embedded in the resin member. A filter (320) connected to the battery (200),
A converter (330) for converting the voltage of the battery supplied through the filter;
A power supply bus bar (311, 312) connecting the battery and the filter, and a terminal block (310) including a bus bar housing (313) housing the power supply bus bar,
A circuit bus bar (331, 332) connecting the filter and the converter,
A smoothing capacitor (351) connected to the battery, and a capacitor unit (350) including a capacitor housing (354) for housing the smoothing capacitor,
The filter includes passive elements (321, 322) connected to the power supply bus bar and the circuit bus bar, a filter housing (327) housing the passive element, and a resin member for fixing the passive element to the filter housing. (328) and
Each of the filter housing and the circuit bus bar is a power conversion device fixed to the bus bar housing or the capacitor housing. The power converter according to claim 10, wherein the power supply bus bar is fixed to the bus bar housing or the capacitor housing together with the filter housing and the circuit bus bar. The filter housing is formed with a locally recessed recess (327a),
The passive element is provided in the recess,
The power conversion device according to claim 10 or 11, wherein a part of the passive element is embedded in the resin member. The filter is a common mode noise filter,
The power conversion device according to claim 1, wherein the passive element includes a first coil (321) and a second coil (322) that are magnetically coupled.

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