Electrical power distribution device

Abstract

Electrical power distribution device (200), with: a power source connector (211) which is connected to a vehicle-side power source (100); a multitude of power connectors (215, 216) which are able to connect to a multitude of vehicle-side power converter circuits (500, 600) and are able to supply power to a multitude of vehicle-side electrical devices (510, 610); at least one power-conducting element (205, 206) comprising a common conducting element (201g, 202g) connected to the power source connector (211) and a plurality of branched conducting elements (201e, 201f, 202e, 202f) branching off from the common conducting element (201g, 202g) to the power connectors (215, 216) accordingly; a noise reduction element (291) provided on a common conductive element (201g, 202g); a power converter circuit (220) which is connected to the power source connector (211); an internal conductive element (201b, 202b) connected to the power converter circuit (220) and the common conductive element (201g, 202g); and a noise filter (292) provided on the internal conducting element (201b, 202b) or the common conducting element (201g, 202g).

Description

TECHNICAL FIELD

[0001] The disclosure relates to an electrical power distribution device having a plurality of connectors. BACKGROUND

[0002] As shown in JP 5 936 745 B1, a power conversion device is known in this field. The power conversion device includes components such as an inverter circuit, a capacitor module, a power module, a DC-DC converter, a charger, a controller for the charger and the DC-DC converter, and an inverter controller.

[0003] JP 2013-219907 A discloses an electrical power conversion device comprising a filter circuit whose input side is connected to a battery, electrical power conversion circuits each provided corresponding to motors and including input sides connected to the output side of the filter circuit and output sides connected to the motors, and converting the electrical power supplied from the battery via the filter circuit to output the converted electrical power to the motors, a first housing accommodating the filter circuit, and second housings provided corresponding to the electrical power conversion circuits and accommodating the electrical power conversion circuits.

[0004] JP 5 936 745 B1 discloses a power conversion device for vehicles that converts power between a power storage device and a load. The power conversion device includes a power module that converts between a direct current of the power storage device and an alternating current supplied to the load, a charger that converts an alternating current supplied via an external terminal to a direct current and outputs the direct current to the power storage device, and a capacitor module connected to the power module and the charger to smooth the voltage. SUMMARY

[0005] In the power conversion device described in JP 5 936 745 B1, the components are arranged within a housing. Electromagnetic noise can penetrate into the housing or propagate from the housing. In the above aspects or other aspects not mentioned, there is a need for further improvements in an electrical power distribution device.

[0006] It is an object of the disclosure to provide an electric power distribution device capable of suppressing electromagnetic noise.

[0007] According to one aspect of the disclosure, an electrical power distribution device is provided. The electrical power distribution device comprises: a power source connector (211) connected to a vehicle-side power source (100); a plurality of power connectors (215, 216) capable of connecting respectively to a plurality of vehicle-side power converters (500, 600) and capable of supplying power to a plurality of vehicle-side electrical devices (510, 610); at least one power-conducting orA current conducting element (205, 206) comprising a common conductive element (201g, 202g) connected to the power source connector, and a plurality of branched conductive elements (201e, 201f, 202e, 202f) branching from the common conductive element corresponding to the power connectors; and a noise reduction element (291) provided on a common conductive element, a power conversion circuit connected to the power source connector, an internal conductive element connected to the power conversion circuit and the common conductive element, and a noise filter provided on the internal conductive element or the common conductive element.

[0008] According to this configuration, the electromagnetic noise at the common conductive element is suppressed.

[0009] In addition, penetration of electromagnetic noise into the vehicle-side conductive source (100) is suppressed. Compared with a plurality of noise reduction elements arranged correspondingly on a plurality of branched conductive elements, it is possible to reduce the number of elements.

[0010] The above reference numerals in parentheses merely indicate a correspondence relationship with a configuration described in an embodiment described below, and in no way limit the technical scope. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The disclosure is further described with reference to the accompanying drawings, in which: Fig. 1 is a circuit diagram for explaining a power supply system; Fig. 2 is a schematic diagram for explaining a power line and a first filter; Fig. 3 is a schematic diagram for explaining a power line and a first filter according to a second embodiment; and Fig. 4 is a schematic diagram for explaining a power line and a first filter according to a third embodiment. DESCRIPTION OF THE EMBODIMENT

[0012] Embodiments and modifications of the disclosure will be described below with reference to the drawings. The embodiments and modifications include common elements. While a common element is described in a particular embodiment, the description of the common element may be omitted in other embodiments and modifications. The same reference numerals are given to the common elements in each of the plurality of embodiments and modifications. First embodiment

[0013] An electric power distribution device or an electric power distribution device according to the present embodiment will be described with reference to Fig. 1 and Fig. 2. In the following description, one end and the other end are used. One end may be referred to as a first end. The other end may be referred to as a second end. The electric power distribution device is applied to an electric vehicle, such as a fully electric vehicle and a plug-in hybrid vehicle.

[0014] In this embodiment, a configuration in which the electric power distribution device is applied to an electric vehicle is described as an example. In the following description, an electronic control unit is installed within multiple units. The electronic control unit includes at least one processor to perform a specific function. The processor may be a logic circuit or the like that includes an electrical circuit configured to perform a specific function. The processor or a part of the processor may be a part of a logic circuit, a gate array, a field-programmable gate array, or the like. The processor may be combined with a tangible non-volatile memory that stores a program readable and executable by the processor.The processor or a portion of the processor may be provided with an accelerator that performs a specific function faster than executing a program. Power supply system

[0015] As in Fig. 1, the electric power distribution device 200 is one of a plurality of components that configure a vehicle power supply system 10. In addition to the electric power supply device 200, the power supply system 10 includes a plurality of components. The power supply system 10 includes a battery pack 100, a first vehicle load 300 (LD1), a second vehicle load 400 (LD2), a front PCU 500 (FrPCU), a front MG 510 (FrMG), a rear PCU 600 (RrPCU), and a rear MG 610 (RrMG). The battery pack 100 may be referred to as an internal power source. The first vehicle load 300 and the second vehicle load 400 may be referred to as auxiliary loads. Furthermore, the vehicle supply system 10 comprises a vehicle-side ECU and a vehicle-side sensor (not shown).The power supply system 10 is capable of being connected to at least one external power source, such as a DC power source 700 (DCPS) and / or an AC power source 800 (ACPS). PCU is an abbreviation for power control unit. MG is an abbreviation for motor generator.

[0016] The battery pack 100 and the electric power distribution device 200 are electrically connected to each other in the vehicle via a wiring harness or the like provided as a power supply path. The first vehicle load 300 and the second vehicle load 400 are electrically connected to the electric power distribution device 200 via a wiring harness or the like. Furthermore, the front PCU 500 and the rear PCU 600 are electrically connected to the electric power distribution device 200 via a wiring harness or the like. The front MG 510 is electrically connected to the front PCU 500. The rear MG 610 is electrically connected to the rear PCU 600.

[0017] Due to the electrical connection configuration, DC electric power output from the battery pack 100 is supplied to the first vehicle load 300 and the second vehicle load 400 via the electric power distribution device 200. Furthermore, this DC electric power is supplied to the front PCU 500 and the rear PCU 600. The battery pack 100 corresponds to a vehicle-side power source.

[0018] Each of the front PCU 500 and the rear PCU 600 includes an inverter circuit and / or a converter circuit for performing power conversion. Furthermore, each of the front PCU 500 and the rear PCU 600 includes at least one electrical control unit. The front PCU 500 and the rear PCU 600 convert supplied DC electrical power into AC electrical power. Conversely, the front PCU 500 and the rear PCU 600 convert supplied AC electrical power into DC electrical power. The front PCU 500 and the rear PCU 600 correspond to the vehicle-side power conversion unit.

[0019] The front MG 510 and the rear MG 610 are motor generators for driving the vehicle, ensuring that the vehicle travels. The front MG 510 is driven by the AC electric power supplied from the front PCU 500. The rear MG 610 is driven by the AC electric power supplied from the rear PCU 600. The front MG 510 generates power to rotate a front wheel of the vehicle. The rear MG 610 generates power to rotate a rear wheel of the vehicle. The front MG 510 and the rear MG 610 each correspond to vehicle-side electrical devices.

[0020] The front MG 510 and the rear MG 610 regeneratively generate electricity by receiving the driving force of the vehicle. The AC electric power generated by this regenerative power generation is converted into DC electric power by the front PCU 500 and the rear PCU 600. The DC electric power is supplied to the first vehicle load 300 and the second vehicle load 400 via the electric power distribution device 200. Furthermore, the DC electric power is supplied to the battery pack 100 via the electric power distribution device 200.

[0021] Hereinafter, for convenience, the DC electric power supplied from the battery pack 100 is referred to as on-vehicle source electric power. The electric power generated by regenerative power generation and converted into DC electric power by the front PCU 500 and the rear PCU 600 is referred to as regenerative electric power.

[0022] The first vehicle load 300 includes, for example, a heater mounted on the vehicle, an air conditioner, and an external load connected to an outlet of the vehicle. The electric power from an on-vehicle source and the regenerative electric power are supplied to the first vehicle load 300 via the electric power distribution device 200. Furthermore, as described later, when an external power source is connected to the electric power distribution device 200, charging electric power is supplied to the first vehicle load 300. The charging electric power may be referred to as external electric power.

[0023] As in Fig. As shown in Figure 1, the electric power distribution device 200 includes a DC-DC converter circuit 220. The DC-DC converter circuit 220 is supplied with the electric power from an on-vehicle source, the regenerative electric power, and the charging electric power. The DC-DC converter circuit 220 reduces the supplied electric power to 12V and supplies it to the second vehicle load 400. The second vehicle load 400 is, for example, a speaker, a power window, an electric power steering device, and the like.

[0024] The external DC power source 700 can be connected to the electric power distribution device 200. DC charging electric power output from the DC power source 700 is supplied to the battery pack 100, the first vehicle load 300, and the DC-DC converter circuit 220. As a result, the battery pack 100 is charged. The charging electric power is supplied to the first vehicle load 300, and 12V DC electric power is supplied from the DC-DC converter circuit 220 to the second vehicle load.

[0025] The electric power distribution device 200 includes an AC-DC converter circuit 250. The AC power source 800 is connected to the AC-DC converter circuit 250 from the outside. The AC-DC converter circuit 250 converts the AC electric power supplied from the AC power source 800 into DC electric power. This DC electric power is supplied to the battery pack 100 as charging electric power. As a result, the battery pack 100 is charged. The charging electric power is also supplied to the first vehicle load 300 and the DC-DC converter circuit 220 by controlling the system relay 120, which will be described below. The DC power source 700 and the AC power source 800 correspond to the external power sources.

[0026] As shown above, the electric power distribution device 200 performs a function of supplying the electric power from both the power source and the regenerative power source output in the vehicle to various electrical devices mounted on the vehicle. The electric power distribution device 200 performs a function of supplying charging power supplied from an external power source to various electrical devices mounted on the vehicle. Components included in the battery pack 100 and the electric power distribution device 200 will be described below. Battery pack or accumulator pack

[0027] The battery pack 100 includes an assembled battery 110, system relay 120 (SMR), power relay 130 (RL), a battery ECU 140 (BTECU), and a battery connector 150. The battery ECU 140 controls the operation of the system relays 120 and the power relay 130. The battery ECU 140 includes at least one electrical control unit. An output of the assembled battery 110 to the battery connector 150 side is energized or turned on and off by controlling the system relay 120 and the power relay 130.

[0028] The assembled battery 110 includes a plurality of battery cells connected in series. A voltage corresponding to a potential difference between a positive terminal of the battery cell with the highest potential and a negative terminal of the battery cell with the lowest potential among the plurality of battery cells connected in series corresponds to a power source voltage of the assembled battery 110. A secondary battery such as a lithium-ion battery can be used as the battery cell included in the assembled battery 110.

[0029] One end of a first power source line 101 is connected to the positive terminal of the battery cell at the highest potential among the plurality of battery cells connected in series. One end of the second power source line 102 is connected to the negative terminal of the battery cell at the lowest potential. The other ends of the first power supply line 101 and the second power supply line 102 are provided in and connected to the battery collector 150.

[0030] The system relays 120 are provided in the first power source line 101 and the second power source line 102, respectively. The system relays 120 are mechanical switching elements. The system relays 120 are normally closed switching elements that are turned off by inputting control signals from the battery ECU 140 and turned on by interrupting the control signals. SMR is an abbreviation for System Main Relay.

[0031] One end of a third power source line 103 is connected to an intermediate point between the assembled battery 110 and the system relay 120 on the first power source line 101. One end of a fourth power source line 104 is connected to an intermediate point between the assembled battery 110 and the system relay 120 on the second power source line 102. The other ends of the third power source line 103 and the fourth power source line 104 are provided in and connected to the battery connector 150.

[0032] The power relays 130 are provided in the third power source line 103 and the fourth power source line 104, respectively. The power relays 130 are mechanical switching elements. The power relays 130 are normally open switching elements that are turned on by inputting control signals from the battery ECU 140 and turned off by interrupting the control signals.

[0033] The battery ECU 140 communicates with at least one of the other vehicle-mounted ECUs and the power distribution ECU 260, which will be described later, via wiring (not shown). The battery ECU 140 controls the operations of the system relay 120 and the power relay 130 based on vehicle signals, including vehicle information, input from communications with these ECUs and the vehicle-mounted sensors.

[0034] As described above, the battery connector 150 is provided with the other ends of the first to fourth power source lines 101 to 104. Electrical connections and disconnections of the first to fourth power source lines 101 to 104 are controlled and switched by the system relays 120 and the power relays 130, which are controlled by the battery ECU 140. The battery ECU 140 controls the system relays 120 and the power relays 130 by switching drive signals between output (on) and non-output (off). The other ends of these four power source lines are capable of being connected to the electric power distribution device 200. Power distribution device

[0035] The electrical power distribution device 200 includes at least a distribution connector 210, a DC-DC converter circuit 220 (DCDC), DC relays 230 (RL), fuses 240, an AC-DC converter circuit 250 (ACDC), and a power distribution ECU 260 (PDECU).

[0036] The distribution connector 210 includes a power source connector 211, a first load connector 212, a second load connector 213, an external DC power source connector 214, a front power connector 215, a rear power connector 216, and an external AC power source connector 217. The power source connector 211 may be referred to as an internal power source connector. The first load connector 212 and the second load connector 213 may be referred to as auxiliary load connectors. The front power connector 215 and the rear power connector 216 may be referred to as power connectors.The external DC power source connector 214 and the external AC power source connector 217 may be referred to as external power source connectors.

[0037] The power source connector 211 is provided with one end of the first to fourth power lines 201 to 204. The battery connector 150 of the battery pack 100 can be connected to the power source connector 211.

[0038] One end of the first power line 201 can be connected to or disconnected from the other end of the first power source line 101 at the battery connector 150 and the power source connector 210. One end of the second power line 202 can be connected to or disconnected from the other end of the second power source line 101 at the battery connector 250 and the power source connector 211. As a result, when the battery connector 150 and the power source connector 211 are coupled and the system relays 120 of the assembled battery 110 are turned on by the battery ECU 140, the first power line 201 and the second power line 202 are electrically connected to the assembled battery 110.Conversely, when the system relays 120 are turned off, electrical connections to the assembled battery 110 via the first power line 201 and the second power line 202 are disconnected.

[0039] The first power line 201 branches from a first main wiring into a plurality of positive lines. Similarly, the second power line 202 branches from a second main wiring into a plurality of negative lines.

[0040] A plurality of pairs of the distal end of the positive line and the distal end of the negative line are provided in a plurality of load connectors 212 to 216. In other words, a plurality of pairs of the other ends of the first power line 201 and the second power line 202 are provided in a plurality of load connectors 212 to 216. For example, one pair of the other ends of the first power line 201 and the second power line 202 is provided in the first load connector 212. The other one pair of the other ends of the first power line 201 and the second power line 202 is provided in the second load connector 213. The other one pair of the other ends of the first power line 201 and the second power line 202 is provided in the front power connector 215.The other one pair of the other ends of the first power line 201 and the second power line 202 is provided in the rear power connector 216. The DC-DC converter circuit 220, the DC relays 230, and the fuses 240 are provided on the positive line and the negative line. The positive line and the negative line are described in more detail below.

[0041] One end of the third power line 203 can be connected to and disconnected from the other end of the third power source line 103 at the battery connector 150 and the power source connector 211. One end of the fourth power line 204 can be connected to and disconnected from the other end of the fourth power source line 104 at the battery connector 150 and the power source connector 211. As a result, when the battery connector 150 and the power source connector 211 are coupled and the power relays 130 of the assembled battery 110 are turned on by the battery ECU 140, the third power line 203 and the fourth power line 204 are electrically connected to the assembled battery 110.When the battery connector 150 and the power source connector 211 are uncoupled or the power relays 130 of the assembled battery 110 are turned off by the battery ECU 140, the third power line 203 and the fourth power line 204 are electrically disconnected from the assembled battery 110.

[0042] The AC-DC converter circuit 250 is provided on the third power line 203 and the fourth power line 204. A pair of the other ends of the third power line 203 and the fourth power line 204 are provided in the external AC power source connector 217. The AC power source 800 is connected to the AC power source connector 217 from the outside. As a result, when the power relays 130 are turned on, the assembled battery 110 and the AC power source 800 are electrically connected via the AC-DC converter circuit 250.

[0043] The power distribution ECU 260 communicates with at least one of the vehicle-mounted ECUs and the battery ECU 140 via wiring (not shown). The power distribution ECU 260 includes at least one electrical control unit. The power distribution ECU 260 controls operations of the DC-DC converter circuit 220, the DC relays 230, and the AC-DC converter circuit 250 based on vehicle signals, including vehicle information, input from communications with the ECUs and vehicle-mounted sensors (not shown).

[0044] As described above, the DC power source 700 and the AC power source 800 can be connected to the electric power distribution device 200 from outside as external power sources. If these external power sources are, for example, an electric power charging station, the power distribution ECU 260 communicates with a control unit arranged in the electric power charging station. The power distribution ECU 260 outputs this communication result to the vehicle-side ECUs and the battery ECU 140. The power distribution ECU 260 controls an operation of the DC-DC converter circuit 220, the DC relays 230, and the AC-DC converter circuit 52 based on the communication result and the vehicle information. Similarly, the battery ECU 140 controls an operation of the system relay 120 and the power relays 130 based on the communication result and the vehicle information. Positive line and negative line

[0045] As in Fig. As shown in Figure 1, the first power line 201 branches off from the first main wiring into four lines, including: a first positive line 201a, a second positive line 201b, a third positive line 201c, and a fourth positive line 201d. The second power line 202 branches off from the second main wiring into four lines, including: a first negative line 202a, a second negative line 202b, a third negative line 202c, and a fourth negative line 202d.

[0046] A pair of distal ends of the first positive lead 201a and the first negative lead 202a are provided in the first load connector 212. As a result, when the system relays 120 are turned on, the assembled battery 110 and the first vehicle load 300 are electrically connected.

[0047] A pair of distal ends of the second positive line 201b and the second negative line 202b are provided in the second load connector 213. The DC-DC converter circuit 220 is provided on the second positive line 201b and the second negative line 202b. As a result, when electric power is supplied to the DC-DC converter circuit 220, a DC electric power of 12V is supplied to the second vehicle load 400.

[0048] A pair of distal ends of the third positive line 201c and the third negative line 202b are provided in the DC power source connector 214. The DC relays 230 are provided on the third positive line 201c and the third negative line 202c, respectively. As a result, when the DC relays 230 are turned on, the first vehicle load 300 and the DC-DC converter circuit 220 are electrically connected to the DC power source 700. Furthermore, when the system relays 120 are turned on, the assembled battery 110 is electrically connected to the DC power source 700.

[0049] The DC relays 230 are mechanical switching elements. The DC relays 230 are normally open switching elements that are turned on by inputting control signals from the power distribution ECU 260 and turned off by interrupting the control signals. The DC relays 230 correspond to switching elements.

[0050] The fourth positive line 201b branches into two lines, a positive front line 201e and a positive rear line 201f. The fourth negative line 202d branches into two lines, a negative front line 202e and a negative rear line 202f. Fuses 240 are provided on these four lines, respectively.

[0051] A pair of distal ends of the positive front lead 201e and the negative front lead 202e are provided in the front power connector 215. The front PCU 500 is connected to the front power connector 215. As a result, the first vehicle load 300 and the DC-DC converter circuit 220 are electrically connected to the front PCU 500, respectively. When the system relays 120 are turned on, the assembled battery 110 and the front PCU 500 are electrically connected.

[0052] A pair of distal ends of the positive rear lead 201f and the negative rear lead 202f are provided in the rear power connector 216. The rear PCU 600 is connected to the rear power connector 216. As a result, the first vehicle load 300 and the DC-DC converter circuit 220 are electrically connected to the rear PCU 600. When the system relays 120 are turned on, the assembled battery 110 and the rear PCU 600 are electrically connected. Operation of the power supply system

[0053] The operation of the power supply system 10 is described below.

[0054] The battery ECU 140 turns on the system relays 120 during normal times, such as when the vehicle is parked or stopped, or during normal driving. Furthermore, the battery ECU 140 turns off the power relays 130. The power distribution ECU 260 turns off the DC relays 230.

[0055] As a result, the on-vehicle source electric power of the assembled battery 110 is supplied to the first vehicle load 300, the DC-DC converter circuit 220, the front PCU 500, and the rear PCU 600. In contrast, the regenerative electric power of the front MG 510 and the rear MG 610 is supplied to the first vehicle load 300, the DC-DC converter circuit 220, and the assembled battery 110.

[0056] When the DC power source 700 is connected to the electric power distribution device 200 in a parked or stopped state while performing DC charging, the battery ECU 140 turns on the system relay 120. Furthermore, the battery ECU 140 turns off the power relays 130. The power distribution ECU 260 turns on the DC relays 230.

[0057] As a result, the DC electric power supplied from the DC-DC power source 700 is supplied to the assembled battery 110, the first vehicle load 300, and the DC-DC converter circuit 220. An amount of electric power supplied to the first vehicle load 300 is determined according to a required power of the first vehicle load 300.

[0058] When the AC power source 800 is connected to the electric power distribution device 200 in a parked or stopped state while performing AC charging, the battery ECU 140 turns on the system relay 120 and the power source relay 130, respectively. The power distribution ECU 260 turns off the DC relay 230.

[0059] As a result, the AC electric power supplied from the AC power source 800 is converted into DC electric power by the AC-DC converter circuit 250. This DC electric power is supplied to the assembled battery 110, the first vehicle load 300, and the DC-DC converter circuit 220. The amount of electric power supplied to the first vehicle load 300 is determined according to the required power of the first vehicle load. Vehicle condition

[0060] Next, a vehicle mounting state of the electric power distribution device 200 will be described with reference to FIG. Fig. 2. In Fig. 2, part of the power line, the DC-DC converter circuit 220, the DC relays 230, the fuses 240, the AC-DC converter circuit 250, and the power distribution ECU 260 are not shown. Furthermore, an illustration of a cover member, which will be described later, is omitted.

[0061] In the following, the three directions that are perpendicular to each other are referred to as the x-direction, the y-direction, and the z-direction. One of the x-direction and the y-direction corresponds to the transverse direction of the vehicle, and the other corresponds to a longitudinal direction of the vehicle, i.e., a direction of travel and a reverse direction. The z-direction corresponds to an up and down direction of the vehicle.

[0062] In addition to the electrical devices described so far, the electrical power distribution device 200 includes a housing 270 which is Fig. 2, and a cover member that closes an opening of the housing 270. The housing 270 may be referred to as a frame. The housing 270 includes a bottom wall 271 with a thin thickness in the z-direction and a side wall 272 that rises annularly in the z-direction from the inner bottom surface 271a of the bottom wall 271.

[0063] An outer floor surface on a rear side of the inner floor surface 271a is provided on a side quite close to the underbody side of the vehicle in the z-direction with respect to the inner floor surface 271a. A flange portion 271c for bolting or anchoring the electric power distribution device 200 to an underbody or underbody is integrally connected to the floor wall 271 and forms the outer floor surface. Inner wall and outer wall

[0064] As in Fig. As shown in Figure 2, the side wall 272 includes an inner horizontal wall 273 and an outer horizontal wall 274, which are spaced apart from each other in the x-direction. The side wall 272 includes an inner vertical wall 275 and an outer vertical wall 276, which are spaced apart from each other in the y-direction. The side wall 272 forms a ring shape by connecting these four walls side by side in the circumferential direction about the z-axis.

[0065] These four walls are arranged so that, when the vehicle is assembled, they face the horizontal sides of the vehicle. In the x-direction, the inner horizontal wall 273 is positioned further inside the vehicle than the outer horizontal wall 274. In the y-direction, the inner vertical wall 275 is positioned further inside the vehicle than the outer vertical wall 276. Connector arrangement

[0066] Grooves, openings, and the like are formed in these four walls of the side wall 272 to provide the distribution connectors 210. Among the four walls, the power source connector 211, the front power connector 215, and the rear power connector 216 are provided on the inner horizontal wall 273 or the inner vertical wall 275, which are located relatively on the inside of the vehicle. The DC power source connector 214 and the AC power source connector 217 are provided on the outer horizontal wall 274 or the outer vertical wall 276, which are located relatively on the outside of the vehicle. The first load connector 212 and the second load connector 213 can be provided on any of these four walls.

[0067] According to the configuration described above, the power connector 211, the front power connector 215, and the rear power connector 216 are provided on an inner side of the vehicle, compared with the external DC power source connector 214 and the external AC power source connector 217. In this way, the connectors used during operation of the vehicle are provided on an inner side of the vehicle, compared with the connectors used during supplying the external power source.

[0068] As especially in Fig. 2, in the present embodiment, the inner vertical wall 275 is provided with the power source connector 211, the front power connector 215, and the rear power connector 216. On the inner vertical wall 275, the power source connector 211, the front power connector 215, and the rear power connector 216 are arranged side by side in the x-direction.

[0069] The DC power source connector 214 and the AC power source connector 217 are provided on the outer vertical wall 276. The second load connector 213 is provided on the inner horizontal wall 273. The first load connector 212 is provided on the outer horizontal wall 274.

[0070] The second load connector 213 functions to supply 12V DC power to the vehicle-side devices involved in vehicle operating functions. Therefore, it is preferable that the second load connector 213 be disposed on the interior side of the vehicle rather than the DC power source connector 214 and the AC power source connector 217. In the present embodiment, the second load connector 213 is provided on the inner horizontal wall 273 and is provided on a portion of the inner horizontal wall 273 that is closer to the inner vertical wall 275 in the y-direction. Arrangement of the electrical components

[0071] When the electrical devices housed in the casing 270 are classified into a first device group including devices used during operation of the vehicle and a second device group including devices used during supply of the external power source, the devices in the first device group are arranged on an inner side of the vehicle rather than the devices in the second device group.

[0072] The first device group includes the DC-DC converter circuit 220, the fuses 240, and the power distribution ECU 260. The second device group includes the DC relay 230 and the AC-DC converter circuit 250. The power distribution ECU 260 is used both during operation and during external power supply, but is included in the first device group because it relates to drive control during operation. However, it is also possible to employ a configuration in which at least part of the first device group is provided on an exterior side of the vehicle rather than the second device group. Power supply line

[0073] Hereinafter, for convenience, a part connecting the power source connector 211 and the front power connector 215, and a part connecting the power source connector 211 and the rear power connector 216 are collectively referred to as a first power supply line 205 in the first power line 201. A part connecting the power source connector 211 and the front power connector 215, and a part connecting the power source connector 211 and the rear power connector 216 are collectively referred to as a second power supply line 206 in the second power line 202.

[0074] Fig. 2 briefly shows the first power supply line 205 and the second power supply line 206. A pair of ends of the first power supply line 205 and the second power supply line 206 are provided in the power source connector 211. A pair of the other ends of the first power supply line 205 and the second power supply line 206 branch into a plurality of connectors. A pair of the other ends of the first power supply line 205 and the second power supply line 206 are provided in the front power connector 215. A pair of the other ends of the first power supply line 205 and the second power supply line 206 are provided in the rear power connector 216.

[0075] The first power supply line 205 and the second power supply line 206 are provided on an inner side of the vehicle, compared to the DC power source connector 214 and the AC power source connector 217 used during supply of the external power source. In the present embodiment, the first power supply line 205 and the second power supply line 206 are provided on a side near the inner vertical wall 275 in the y-direction. Both the first power supply line 205 and the second power supply line 206 are arranged along inner walls, that is, along the inner vertical wall 275.

[0076] The first power supply line 205 includes the positive common line 201g and the aforementioned fourth positive line 201d. The positive common line 201g is included in the above-described first main wiring. The fourth positive line 201d includes the aforementioned positive front line 201e and the positive rear line 201f.

[0077] One end of the positive common line 201g corresponds to one end of the first power supply line 205 and is provided in the power source connector 211. One end of the positive front line 201e and one end of the positive rear line 201f are connected to the other end of the positive common line 201g. The other end of the positive common line 201g is a first branch point that branches into these two positive lines.

[0078] The other ends of the positive front line 201e and the positive rear line 201f correspond to the other end of the first power supply line 205. The other end of the positive front line 201e is provided in the front power connector 215. The other end of the positive rear line 201f is provided in the rear power connector 216.

[0079] The second supply line 206 includes a negative common line 202g and the aforementioned fourth negative line 202d. The negative common line 202g is included in the second main wiring described above. The fourth negative line 202d includes the aforementioned negative front line 202e and negative rear line 202f.

[0080] One end of the negative common line 202g corresponds to one end of the second power supply line 206 and is provided in the power source connector 211. One end of the negative front line 202e and one end of the negative rear line 202f are connected to the other end of the negative common line 202g. The other end of the negative common line 202g is a second branch point that branches into these two negative lines.

[0081] The other ends of the negative front line 202e and the negative rear line 202f correspond to the other ends of the second power supply line 206. The other end of the negative front line 202e is provided in the front power connector 216. The other end of the negative rear line 202f is provided in the rear power connector 216.

[0082] The positive common line 201g and the negative common line 202g each extend in the y-direction and then in the x-direction, so that they are separated from the power source connector 211. The positive common line 201g and the negative common line 202g have the same length. The positive common line 201g and the negative common line 202g extend in the x-direction and the y-direction in such a way that these lines are arranged side by side and run parallel.

[0083] The positive front lead 201e extends from the first branch point of the positive common lead 201g toward the front power connector 215. The positive rear lead 201f extends from the first branch point toward the rear power connector 216. These two positive leads are shorter than the positive common lead 201g.

[0084] The negative front line 202e extends from the second branch point of the negative common line 202g toward the front power connector 215. The negative rear line 202f extends from the second branch point toward the rear power connector 216. These two negative lines are shorter than the negative common line 202g.

[0085] The positive front line 201e and the negative front line 202e are of equal length. These two front lines extend in the x-direction and the y-direction in such a way that these lines are arranged side by side and run parallel.

[0086] The positive rear lead 201f and the negative rear lead 202f have the same length. These two rear leads extend in the x-direction and the y-direction in such a way that these leads are arranged side by side and run parallel.

[0087] The positive common line 201g corresponds to one common conductive element. The negative common line 202g corresponds to one common conductive element. The positive common line 201g and the negative common line 202g provide two common conductive elements. The positive front line 201e and the positive rear line 201f correspond to the branched conductive elements for the first power supply line 205. The negative front line 202e and the negative rear line 202f correspond to the branched conductive elements for the second power supply line 206. The positive front line 201e and the positive rear line 201f, the negative front line 202e, and the negative rear line 202f provide four branched conductive elements. The first power supply line 205 corresponds to one power conductive element.The second power supply line 206 corresponds to a power-conducting element. The first power supply line 205 and the second power supply line 206 provide two power-conducting elements. First filter

[0088] In addition to the electrical devices described so far, the electrical power distribution device 200 comprises at least a first filter 291. As in Fig. As shown in Figure 2, the electric power distribution device 200 may include two first filters 291. One of the first filters 291 is provided on the first power supply line 205. The other of the first filters 291 is provided on the second power supply line 206, respectively. As a result, the first filters 291 are provided on the first power supply line 205 and the second power supply line 206, respectively. The first filters 291 have functions of reducing noise components on a current, such as ripples, input from the front PCU 500 and the rear PCU 600. At least one of the first filters 291 corresponds to a noise reduction element. The first filter 291 may be referred to as a noise removal element.

[0089] The frequency band of the noise components on the current is approximately 2.0 MHz. As an element with a noise reduction function, for example, a ferrite core, a capacitor, a filter circuit, or the like can be used. For example, a spinel ferrite, a hexagonal crystal ferrite, a garnet ferrite, or the like can be used as the ferrite. These elements can be used as the first filter 291.

[0090] When a ferrite core is used as the first filter 291, the first filter 291 may be provided on both communication lines so that the first filter 291 collectively surrounds both the positive common line 201g and the negative common line 202g, which run side by side. Therefore, although Fig. 2 illustrates that two first filters 291 are provided on the two common lines respectively, it is possible to employ a configuration in which a single first filter 291 is provided commonly on both two common lines.

[0091] When a capacitor is used as the first filter 291, two capacitors are provided on the two common lines, respectively. For example, at least a first capacitor is arranged such that one capacitor electrode among the two capacitor electrodes is connected to the positive common line 201g. The other of the two capacitor electrodes of the first capacitor is connected to the ground. At least a second capacitor different from the first capacitor is arranged such that one capacitor electrode among the two capacitor electrodes is connected to the negative common line 202g. The other of the second capacitor electrodes of the second capacitor is connected to the ground. Two of the other capacitor electrodes of the first capacitor and the second capacitor may be connected as a single wiring, and the single wiring may be connected to the ground.

[0092] As in Fig. 2, the first filters 291 provided on the first power supply line 205 and the second power supply line 206 are provided at portions close to the other ends, that is, the branched ends. On the first power supply line 205 and the second power supply line 206, the first filters 291 are provided at portions closer to the other ends than to the one ends. In the first power supply line 205, a total length from a portion on which the first filter 291 is provided to the one end provided in the power source connector 211 is a first distance L1. In the second supply line 206, a total length from a portion on which the first filter 291 is provided to the one end provided in the power source connector 211 is a first distance L1.Although the first distances L1 in the first power supply line 205 and the second power supply line 206 may be slightly different, it is possible to consider the first distances L1 as the same. In the first power supply line 205, a total length from the portion of the first filter 291 to the other end provided in the front power connector 215 or the rear power connector 216 is a second distance L2. In the second power supply line 206, a total length from the portion of the first filter 291 to the other end provided in the front power connector 215 or the rear power connector 216 is a second distance L2.Although the second distances L2 in the first power supply line 205 and the second power supply line 206 may be slightly different, the second distance L2 can be considered the same. The second distance L2 is shorter than the first distance L1 (L2 < L1).

[0093] As described above, the first filter 291 is provided on a portion of the power supply line closer to the other end than to one end thereof. The first filter 291 is provided on a portion of the positive common line 201g and / or the negative common line 202g. The first filter 291 is still provided on the positive common line 201g and / or the negative common line 202g, and is not provided on any of the positive front line 201e, the positive rear line 201f, the negative front line 202e, and the negative front line 202f. More specifically, the first filter 291 is provided on a portion of at least one of the positive common line 201g and the negative common line 202g closer to the other end than to one end thereof.In other words, the first filter 291 is provided on a portion of the common line closer to the branching point from which both the positive front line 201e and the positive rear line 201f branch, or both the negative front line 202e and the negative front line 202f branch. Operation and Advantage

[0094] As described above, the first filters 291 are provided on both the first supply line 205 and the second supply line 206. Accordingly, the current noise flowing into the electric power distribution device 200 from the front PCU 500 and the rear PCU 600 can be reduced. Penetration of this current noise into the battery pack 100 is suppressed.

[0095] As described above, the first power supply line 205 includes the positive front line 201e, the positive rear line 201f, and the positive common power 201g connected to these two positive lines. The first filter 291 is provided on the positive common line 201g.

[0096] Similarly, the second supply line 206 includes the negative front line 202e, the negative rear line 202f, and the negative common line 202g, which is commonly connected to these two negative lines. The first filter 291 is provided on the negative common line 202g.

[0097] Accordingly, it is possible to suppress an increase in the number of elements as compared with a configuration in which a plurality of first filters 291 are provided on each of the front lines and the rear lines.

[0098] Furthermore, when a ferrite core is employed as the first filter 291, a single first filter 291 is provided on both the positive common line 201g and the negative common line 202g, which extend side by side in parallel. The ferrite core can provide a single magnetic path surrounding both the positive common line 201g and the negative common line 202g. The single first filter 291 functions as a common element on both the positive common line 201g and the negative common line 202g. As a result, it is possible to suppress an increase in the number of elements compared with a configuration in which two first filters are provided on both common lines, respectively.

[0099] Of course, noise components on the current cannot be reduced until they enter the first filter 291. The noise components may propagate electromagnetic noise while flowing from the other end side of each of the first supply line 205 and the second supply line 206 to a portion where the first filter 291 is provided. The electromagnetic noise may propagate to an internal cavity of the housing 270.

[0100] On the other hand, the first filter 291 is provided on the other end side of the first supply line 205 and the second supply line 206. More specifically, the first filter 291 is provided on a portion of at least one of the positive common line 201g and the negative common line 202 closer to the other end than one end thereof. In other words, the first filter 291 is provided on a portion of the common line that is close to the branching point from which both the positive front line 201e and the positive rear line 201f or both the negative front line 202e and the negative rear line 202f branch.

[0101] Therefore, the current noise flows through the common line until the current noise reaches the first filter 291. The distance of the common line through which the current noise flows is shortened. For example, the current noise only flows a distance from the branch point to the first filter 291 in the common line. As a result, it is possible to reduce the propagation of electromagnetic noise into the internal cavity of the housing 270.

[0102] Each of the positive front lead 201e and the positive rear lead 201f is shorter than the positive common lead 201g. Each of the negative front lead 202e and the negative rear lead 202f is shorter than the negative common lead 202g.

[0103] Accordingly, the distance over which the current noise flows between the two branched positive lines and the two branched negative lines is shortened. As a result, it is possible to reduce the propagation of electromagnetic noise into the internal cavity of the housing 270.

[0104] The power source connector 211, the front power connector 215, and the rear power connector 216 used during operation of the vehicle are provided on an inner side of the vehicle compared with the other connectors.

[0105] Therefore, it is possible to prevent the power source connector 211, the front power connector 215, and the rear power connector 216 from being damaged due to an external force applied to the interior of the vehicle. It is possible to prevent the battery pack 100 from interfering with the supply of power to the front PCU 500 and the rear PCU 600. As a result, it is possible to prevent problems in supplying power to the front MG 510 and the rear MG 610. It is possible to prevent the vehicle from becoming difficult to drive due to the external force.

[0106] Furthermore, the first power supply line 205 and the second power supply line 206, which electrically connect a pair of the power source connector 211 and the front power connector 215 and a pair of the power source connector 211 and the rear power connector 216, are provided on the inner side of the vehicle.

[0107] Therefore, it is possible to prevent failures on these supply lines due to external forces. It is possible to prevent the vehicle from experiencing problems supplying electrical power to the front MG 510 and the rear MG 610.

[0108] As described above, the power source connector 211, the front power connector 215 and the rear power connector 216, and the first power supply line 205 and the second power supply line 206 connecting these three connectors are provided on an inner side of the vehicle.

[0109] Specifically, in this embodiment, the power source connector 211, the front power connector 215, and the rear power connector 216 are provided on the inner vertical wall 275. These three connectors are arranged adjacent to each other in the x-direction. The first power supply line 205 and the second power supply line 206 are provided on a side close to the inner vertical wall 275 in the y-direction. Both the first power supply line 205 and the second power supply line 206 are provided along the inner vertical wall 275. Due to this arrangement configuration, it is possible to reduce an increase in the wiring length of each of the first power supply line 205 and the second power supply line 206.

[0110] The DC-DC converter circuit 220, the fuses 240, and the power distribution ECU 260 included in the first device group used when the vehicle is in operation are provided on an inner side of the vehicle.

[0111] Therefore, it is possible to prevent failure of the primary device due to the application of an external force to the vehicle. It is possible to prevent problems supplying electrical power to the MG. Second embodiment

[0112] Next, a second embodiment will be described with reference to Fig. 3 described.

[0113] The first embodiment shows an example in which the first filter 291 is provided on a portion closer to the other end of the positive common line 201g and the negative common line 202g. On the other hand, in this embodiment, as in Fig. 3, the first filter 291 is provided on a portion closer to the other end of the positive common line 201g and the negative common line 202g, and the second filter 292 is provided on a portion closer to the one end side of the positive common line 201g and the negative common line 202g. In this embodiment, the power connector 211 is provided on the inner horizontal wall 273 and is provided on a portion of the inner horizontal wall 273 that is close to the inner vertical wall 275.

[0114] The second positive line 201b is connected to an intermediate point between a portion where the first filter 291 is disposed and a portion where the second filter 292 is disposed on the positive common line 201g. The second negative line 202b is connected to an intermediate point between a portion where the first filter 291 is disposed and a portion where the second filter 292 is disposed on the negative common line 202g. As described above, the DC-DC converter circuit 220 is provided on the second positive line 201b and the second negative line 202b.

[0115] The DC-DC converter circuit 220 corresponds to a power converter circuit. The second positive line 201b corresponds to an internal conductive element.

[0116] The negative line 202b corresponds to an internal conductive element. The second positive line 201b and the second negative line 202b correspond to two internal conductive elements. The second filter 292 corresponds to a noise filter.

[0117] The second filter 292 has a function of reducing current noise input from the DC-DC converter circuit 220. This current noise is mainly caused by the switching of the switching element included in the DC-DC converter circuit 220, and its frequency band is approximately 1.0 MHz. As described above, the frequency band of the current noise to be reduced differs between the second filter 292 and the first filter 291. As an element with a noise reduction function, for example, a ferrite core and a capacitor or the like can be used.

[0118] Current noise may enter from the front PCU 500 and / or the rear PCU 600. Current noise may enter from the DC-DC converter circuit 220. According to the configuration shown above, it is possible to suppress the current noise flowing through the positive common line 201g and the negative common line 202g. Current noise input from the front PCU 500 and the rear PCU 600 is suppressed from being input to the DC-DC converter circuit 220.

[0119] The electric power distribution device 200 described in the present embodiment includes similar components to those of the electric power distribution device 200 described in the first embodiment. Therefore, a similar effect can be provided. This also applies to the embodiment described below. This description will be omitted below. Third embodiment

[0120] Next, a third embodiment will be described with reference to Fig. 4 described.

[0121] The second embodiment shows an example in which the second filter 292 is provided on each of the positive common line 201g and the negative common line 202g. On the other hand, this embodiment shows a configuration in which the second filters 292 are provided on the second positive line 201b and the second negative line 202b, respectively.

[0122] According to this configuration, where the current noise can be output from the DC-DC converter circuit 220, it is possible to reduce the intrusion of the current noise into the front PCU 500 and the rear PCU 600. In contrast, when the current noise is output from the front PCU 500 and the rear PCU 600, it is possible to reduce the intrusion of the current noise into the DC-DC converter circuit 220.

[0123] In this embodiment, the front power connector 215 and the rear power connector 216 are provided on the outer horizontal wall 274 and are provided on a portion of the outer horizontal wall 274 that is close to the inner vertical wall 275.

[0124] Although the present disclosure is described with reference to the preferred embodiments, the present disclosure is not limited to the above-described embodiment and may be implemented with various modifications without departing from the spirit of the present disclosure. Other modifications

[0125] In the above embodiments, examples are shown in which the system is provided with both the front MG 510 and the rear MG 610. However, it is also possible to employ a configuration in which the system is provided with only one of the front MG 510 and the rear MG 610. If only one of these MGs is provided in the system, the system is provided with only one of the front MG 510 and the rear MG 610.

[0126] As described above, it should be understood that this specification discloses the following technical solutions.

[0127] Disclosure 1. An electrical power distribution device, comprising: a power source connector (211) connected to a vehicle-side power source (100); a plurality of power connectors (215, 216) capable of connecting to a plurality of vehicle-side power converter circuits (500, 600) respectively, and capable of supplying power to a plurality of vehicle-side electrical devices (510, 610) respectively; at least one power conductive element (205, 206) comprising a common conductive element (201g, 202g) connected to the power source connector, and a plurality of branched conductive elements (201e, 201f, 202e, 202f) branching from the common conductive element to the power connectors respectively; and a noise reduction element (291) provided on a common conductive element.

[0128] Disclosure 2. The electric power distribution device according to Disclosure 1, wherein the noise reduction element is provided on a portion of the common conductive element close to the branched conductive elements.

[0129] Disclosure 3. The electric power distribution device according to Disclosure 1 or 2, wherein each of the plurality of branched conductive elements has a shorter length than the common conductive element.

[0130] Disclosure 4. The electrical power distribution device according to any one of Disclosures 1 to 3, wherein the power source connector and the plurality of power connectors are arranged side by side.

[0131] Disclosure 5. The electrical power distribution device according to any one of Disclosures 1 to 4, further comprising: a power conversion circuit (220) connected to the power source connector; an internal conductive element (201b, 202b) connected to the power conversion circuit and the common conductive element; and a noise filter (292) provided on the internal conductive element or the common conductive element.

[0132] Disclosure 6. The electric power distribution device according to Disclosure 5, wherein the noise filter is provided on the common conductive member, and wherein the internal conductive member is connected to a portion of the common conductive member between a portion of the common conductive member on which the noise filter is provided and a portion of the common member on which the noise reduction element is provided.

[0133] Disclosure 7. The electric power distribution device according to Disclosure 5, wherein the noise filter is provided on the internal conductive member, and wherein the internal conductive member is connected to a portion of the common conductive member between a portion of the common conductive member on which the noise reduction element is provided and a portion of the common conductive member connected to the power source connector.

[0134] A positive common line (201g) and a negative common line (202g) are connected to a power source connector (211) connected to a battery pack. First filters (291) are provided on these two common lines, respectively. The positive common line branches into a positive front line (201e) and a positive rear line (201f). The negative common line branches into a negative front line (202e) and a negative rear line (202f). These two front lines are connected to a front power connector (215) connected to a front power control unit. These two rear lines are connected to a rear power connector (216) connected to a rear power control unit. It is possible to suppress electromagnetic noise on common lines.

Claims

[1] Electrical power distribution device (200), comprising: a power source connector (211) connected to a vehicle-side power source (100); a plurality of power connectors (215, 216) capable of connecting respectively to a plurality of on-vehicle power converter circuits (500, 600) and capable of supplying power respectively to a plurality of on-vehicle electrical devices (510, 610); at least one power conducting element (205, 206) comprising a common conducting element (201g, 202g) connected to the power source connector (211) and a plurality of branched conducting elements (201e, 201f, 202e, 202f) branching from the common conducting element (201g, 202g) to the power connectors (215, 216) respectively; a noise reduction element (291) provided on a common conductive element (201g, 202g); a power converter circuit (220) connected to the power source connector (211); an internal conductive element (201b, 202b) connected to the power converter circuit (220) and the common conductive element (201g, 202g); and a noise filter (292) provided on the internal conductive element (201b, 202b) or the common conductive element (201g, 202g). [2] The electric power distribution device (200) according to claim 1, wherein the noise reduction element (291) is provided on a portion of the common conductive element (201g, 202g) close to the branched conductive elements (201e, 201f, 202e, 202f). [3] The electric power distribution device (200) according to claim 1 or 2, wherein each of the plurality of branched conductive elements (201e, 201f, 202e, 202f) has a shorter length than the common conductive element (201g, 202g). [4] The electrical power distribution device (200) according to any one of claims 1 to 3, wherein the power source connector (211) and the plurality of power connectors (215, 216) are arranged side by side. [5] The electric power distribution device (200) according to claim 1, wherein the noise filter (292) is provided on the common conductive member (201g, 202g), and wherein the internal conductive member (201b, 202b) is connected to a portion of the common conductive member (201g, 202g) between a portion of the common conductive member (201g, 202g) on ​​which the noise filter (292) is provided and a portion of the common conductive member (201g, 202g) on ​​which the noise reduction element (291) is provided. [6] The electric power distribution device (200) according to claim 1, wherein the noise filter (292) is provided on the internal conductive member (201b, 202b), and wherein the internal conductive member (201b, 202b) is connected to a portion of the common conductive member (201g, 202g) between a portion of the common conductive member (201g, 202g) on ​​which the noise reduction element (291) is provided and a portion of the common conductive member (201g, 202g) connected to the power source connector (211).

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