Power distribution apparatus

Abstract

The positive common line (201g) and the negative common line (202g) are connected to a power supply connector (211) connected to the battery pack. First filters (291) are provided on these two common lines, respectively. The positive common line is branched into a positive front line (201e) and a positive rear line (201f). The negative common line is branched 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. Electromagnetic noise waves on the common lines can be suppressed.

Description

Technical Field

[0001] This disclosure relates to a power distribution device including multiple connectors. Background Technology

[0002] As shown in JP5936745B, a power conversion device is known in the art. The power conversion device includes components such as an inverter circuit, a capacitor module, a power module, a DC-DC converter, a charging device, a controller for the charging device and the DC-DC converter, and an inverter controller.

[0003] In the power conversion device described in JP5936745B, components are arranged within a housing. Electromagnetic noise can enter or propagate from the housing. Further improvements to the power distribution device are needed in the aforementioned aspects or in other aspects not mentioned. Summary of the Invention

[0004] One object of this disclosure is to provide a power distribution device capable of suppressing electromagnetic noise.

[0005] According to one aspect of this disclosure, a power distribution device is provided. A power distribution device includes:

[0006] A power connector that connects to the vehicle's power supply;

[0007] Multiple power connectors, each of which can be connected to multiple on-board power converters and can supply power to multiple on-board electrical devices respectively;

[0008] At least one conductive member, the conductive member comprising a common conductive member connected to a power connector and a plurality of branch conductive members branching from the common conductive member to the power connector; and

[0009] A noise reduction element is disposed on a common conductive member.

[0010] According to this design, electromagnetic noise is suppressed at the common conductive component.

[0011] Furthermore, electromagnetic noise entering the vehicle's power supply is suppressed. Compared to multiple noise reduction elements disposed on multiple branch conductive components, the number of components can be reduced. Attached Figure Description

[0012] This disclosure will be further described with reference to the accompanying drawings, in which:

[0013] Figure 1 It is a circuit diagram used to illustrate the power supply system;

[0014] Figure 2 This is a schematic diagram used to illustrate the wires and the first filter;

[0015] Figure 3 This is a schematic diagram illustrating the first filter and wires according to the second embodiment;

[0016] Figure 4 This is a schematic diagram illustrating the first filter and wires according to the third embodiment. Detailed Implementation

[0017] In the following description, embodiments and variations of this disclosure are illustrated with reference to the accompanying drawings. These embodiments and variations include common elements. When a common element is described in a particular embodiment, its description may be omitted in other embodiments and variations. The same reference numerals are used to denote common elements in each of the various embodiments and variations.

[0018] First Implementation Method

[0019] refer to Figure 1 and Figure 2 This description describes a power distribution device according to this embodiment. In the following description, "one end" and "the other end" are used. One end may be referred to as the first end. The other end may be referred to as the second end. The power distribution device is applied to electric vehicles, such as fully electric vehicles and plug-in hybrid vehicles.

[0020] In this embodiment, as an example, a configuration for applying a power distribution device to an electric vehicle is described. In the following description, an electronic control unit is mounted in multiple units. The electronic control unit includes at least one processor that performs a specific function. The processor may be logic circuitry, etc., including circuitry configured to perform the specific function. The processor or a portion thereof may be a part of logic circuitry, a gate array, a field-programmable gate array, etc. The processor may be combined with tangible non-transitional memory that stores a program that can be read and executed by the processor. The processor or a portion thereof may be provided by an accelerator that performs the specific function faster than the program execution.

[0021] Power supply system

[0022] like Figure 1As shown, the power distribution unit 200 is one of several components constituting the vehicle's power supply system 10. Besides the power distribution unit 200, the power supply system 10 includes several 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 power supply system 10 includes an onboard ECU and onboard sensors (not shown). The power supply system 10 is capable of connecting to at least one external power source, such as a DC power supply 700 (DCPS) and / or an AC power supply 800 (ACPS). PCU is an abbreviation for Power Control Unit. MG is an abbreviation for Motor Generator.

[0023] The battery pack 100 and the power distribution unit 200 are electrically connected to each other in the vehicle via wiring harnesses or the like, which serve as power supply paths. The first vehicle load 300 and the second vehicle load 400 are electrically connected to the power distribution unit 200 via wiring harnesses or the like. Furthermore, the front PCU 500 and the rear PCU 600 are electrically connected to the power distribution unit 200 via wiring harnesses 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.

[0024] Due to the electrical connection configuration, the DC power output from the battery pack 100 is supplied to the first vehicle load 300 and the second vehicle load 400 via the power distribution device 200. Furthermore, this DC power is supplied to the front PCU 500 and the rear PCU 600. The battery pack 100 corresponds to the vehicle's power supply.

[0025] Each of the front PCU 500 and the rear PCU 600 includes inverter circuitry and / or converter circuitry for performing power conversion. Furthermore, each of the front PCU 500 and the rear PCU 600 includes at least one electronic control unit. The front PCU 500 and the rear PCU 600 convert the supplied DC power to AC power. Conversely, the front PCU 500 and the rear PCU 600 convert the supplied AC power to DC power. The front PCU 500 and the rear PCU 600 correspond to on-board power conversion units.

[0026] The front MG 510 and rear MG 610 are electric generators used to propel the vehicle. The front MG 510 is powered by AC power supplied from the front PCU 500. The rear MG 610 is powered by AC power supplied from the rear PCU 600. The front MG 510 generates power to rotate the front wheels of the vehicle. The rear MG 610 generates power to rotate the rear wheels of the vehicle. The front MG 510 and rear MG 610 correspond to the vehicle's electrical equipment, respectively.

[0027] The front MG 510 and rear MG 610 generate electricity regenerates by receiving propulsion from the vehicle. The AC power generated by this regenerative power generation is converted into DC power by the front PCU 500 and rear PCU 600. The DC power is supplied to the first vehicle load 300 and the second vehicle load 400 via the power distribution device 200. In addition, the DC power is supplied to the battery pack 100 via the power distribution device 200.

[0028] In the following text, for convenience, the DC power supplied from the battery pack 100 will be referred to as on-board power. The power generated by regenerative braking and converted into DC power by the front PCU 500 and the rear PCU 600 will be referred to as regenerative power.

[0029] The first vehicle load 300 is, for example, a heater, air conditioning equipment installed on the vehicle, and an external load connected to the vehicle outlet. Onboard power and regenerative power are supplied to the first vehicle load 300 via a power distribution device 200. Furthermore, as described later, charging power is supplied to the first vehicle load 300 when an external power source is connected to the power distribution device 200. This charging power may be referred to as external power.

[0030] like Figure 1 As shown, the power distribution device 200 includes a DC-DC converter circuit 220. The DC-DC converter circuit 220 is supplied with onboard power, regenerative braking power, and charging power. The DC-DC converter circuit 220 steps down the supplied power to 12V and supplies it to a second vehicle load 400. The second vehicle load 400 is, for example, a speaker, power windows, power steering equipment, etc.

[0031] An external DC power supply 700 can be connected to the power distribution device 200. DC charging power output from the DC power supply 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. Charging power is supplied to the first vehicle load 300, and 12V DC power is supplied from the DC-DC converter circuit 220 to the second vehicle load 400.

[0032] The power distribution device 200 includes an AC-DC converter circuit 250. An AC power source 800 is externally connected to the AC-DC converter circuit 250. The AC-DC converter circuit 250 converts the AC power supplied from the AC power source 800 into DC power. This DC power is supplied to the battery pack 100 as charging power. As a result, the battery pack 100 is charged. The charging power is also supplied to the first vehicle load 300 and the DC-DC converter circuit 220 via a system relay 120, described later. The DC power source 700 and the AC power source 800 correspond to external power sources.

[0033] As shown above, the power distribution device 200 performs the function of supplying power from both regenerative power and electrical power source output from the vehicle to various electrical devices installed in the vehicle. The power distribution device 200 also performs the function of supplying charging power from an external power source to various electrical devices installed in the vehicle. Components included in the battery pack 100 and the power distribution device 200 are described below.

[0034] battery pack

[0035] The battery pack 100 includes a battery pack 110, a system relay 120 (SMR), a 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 130. The battery ECU 140 includes at least one electronic control unit. By driving the system relays 120 and 130, the output from the battery pack 110 to the battery connector 150 is controlled to be energized and de-energized.

[0036] The battery pack 110 has multiple battery cells connected in series. The voltage corresponding to the potential difference between the positive terminal of the battery cell with the highest potential and the negative terminal of the battery cell with the lowest potential among the multiple battery cells connected in series corresponds to the power supply voltage of the battery pack 110. Since the battery cells are included in the battery pack 110, a secondary battery such as a lithium-ion battery can be used.

[0037] One end of the first power line 101 is connected to the positive terminal of the battery cell with the highest potential among the multiple battery cells connected in series. One end of the second power line 102 is connected to the negative terminal of the battery cell with the lowest potential. The other ends of the first power line 101 and the second power line 102 are disposed in and connected to the battery connector 150.

[0038] System relays 120 are respectively disposed in the first power line 101 and the second power line 102. System relays 120 are mechanical switching elements. System relays 120 are normally closed switching elements, which are opened by a drive signal input from the battery ECU 140 and turned on by an interrupt drive signal. SMR is an abbreviation for System Main Relay.

[0039] One end of the third power line 103 is connected to the midpoint between the system relay 120 in the first power line 101 and the combined battery 110. One end of the fourth power line 104 is connected to the midpoint between the system relay 120 in the second power line 102 and the combined battery 110. The other ends of the third power line 103 and the fourth power line 104 are disposed in and connected to the battery connector 150.

[0040] Power relays 130 are respectively disposed in the third power line 103 and the fourth power line 104. Power relays 130 are mechanical switching elements. Power relays 130 are normally open switching elements, which are turned on by inputting a drive signal from the battery ECU 140 and turned off by interrupting the drive signal.

[0041] The battery ECU 140 communicates via wiring (not shown) with at least one of other on-board ECUs and the power distribution ECU 260, which will be described later. The battery ECU 140 controls the operation of the system relay 120 and the power relay 130 based on vehicle signals that include vehicle information from communication inputs with these ECUs and on-board sensors.

[0042] As described above, the battery connector 150 is provided with the other ends of the first power line 101 to the fourth power line 104. The electrical connection and disconnection of the first power line 101 to the fourth power line 104 are controlled and switched by system relay 120 and power relay 130 controlled by the battery ECU 140. The battery ECU 140 controls the system relay 120 and power relay 130 by switching drive signals between output (on) and non-output (off). The other ends of these four power lines can be connected to the power distribution device 200.

[0043] Power distribution device

[0044] The power distribution device 200 includes at least one distribution connector 210, a DC-DC converter circuit 220 (DCDC), a DC relay 230 (RL), a fuse 240, an AC-DC converter circuit 250 (ACDC), and a power distribution ECU 260 (PDECU).

[0045] The distribution connector 210 includes a power connector 211, a first load connector 212, a second load connector 213, a DC external power connector 214, a front power connector 215, a rear power connector 216, and an AC external power connector 217. The power connector 211 may be referred to as an internal power 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 DC external power connector 214 and the AC external power connector 217 may be referred to as external power connectors.

[0046] The power connector 211 is provided with one end of the first wire 201 to the fourth wire 204. The battery connector 150 of the battery pack 100 can be connected to the power connector 211.

[0047] One end of the first wire 201 can be connected and disconnected from the other end of the first power line 101 at the battery connector 150 and the power connector 211. One end of the second wire 202 can be connected and disconnected from the other end of the second power line 102 at the battery connector 150 and the power connector 211. As a result, when the battery connector 150 and the power connector 211 are connected via the battery ECU 140 and the system relay 120 of the combined battery 110 is turned on, the first wire 201 and the second wire 202 are electrically connected to the combined battery 110. Conversely, when the system relay 120 is turned off, the electrical connection to the combined battery 110 via the first wire 201 and the second wire 202 is disconnected.

[0048] The first wire 201 branches into multiple positive wires from the first main wiring. Similarly, the second wire 202 branches into multiple negative wires from the second main wiring.

[0049] Multiple pairs of positive and negative wires are provided in multiple load connectors 212 to 216. In other words, multiple pairs of first wires 201 and second wires 202 are provided in multiple load connectors 212 to 216. For example, the other end of one pair of first wires 201 and second wires 202 is provided in the first load connector 212. The other end of another pair of first wires 201 and second wires 202 is provided in the second load connector 213. The other end of another pair of first wires 201 and second wires 202 is provided in the front power connector 215. The other end of another pair of first wires 201 and second wires 202 is provided in the rear power connector 216. The DC-DC converter circuit 220, DC relay 230, and fuse 240 are provided on the positive and negative wires. The positive and negative wires will be described in detail later. One end of the third wire 203 can be connected and disconnected from the other end of the third power line 103 at the battery connector 150 and the power connector 211. One end of the fourth wire 204 can be connected and disconnected from the other end of the fourth power line 104 at the battery connector 150 and power connector 211. As a result, when the battery connector 150 and power connector 211 are connected via the battery ECU 140 and the power relay 130 of the battery pack 110 is turned on, the third wire 203 and the fourth wire 204 are electrically connected to the battery pack 110. When the battery connector 150 and power connector 211 are disconnected via the battery ECU 140, or when the power relay 130 of the battery pack 110 is turned off, the third wire 203 and the fourth wire 204 are electrically disconnected from the battery pack 110.

[0050] The AC-CDC converter circuit 250 is disposed on the third wire 203 and the fourth wire 204. The other ends of the third wire 203 and the fourth wire 204 are disposed in the AC external power connector 217. The AC power supply 800 is externally connected to the AC power connector 217. As a result, when the power relay 130 is turned on, the combined battery 110 and the AC power supply 800 are electrically connected via the AC-CDC converter circuit 250.

[0051] The power distribution ECU 260 communicates with at least one of the on-board ECU and battery ECU 140 via wiring (not shown). The power distribution ECU 260 includes at least one electronic control unit. The power distribution ECU 260 controls the operation of the DC-DC converter circuit 220, the DC relay 230, and the AC-DC converter circuit 250 based on vehicle signals including vehicle information input from communications with these on-board sensors and ECUs (not shown).

[0052] As described above, the DC power supply 700 and AC power supply 800 can be externally connected to the power distribution device 200 as external power sources. When these external power sources are, for example, a power charging station, the power distribution ECU 260 communicates with the control unit configured in the power charging station. The power distribution ECU 260 outputs the communication results to the vehicle ECU and the battery ECU 140. Based on the communication results and vehicle information, the power distribution ECU 260 controls the operation of the DC-DC converter circuit 220, the DC relay 230, and the AC-DC converter circuit 250. Similarly, the battery ECU 140 controls the operation of the system relay 120 and the power relay 130 based on the communication results and vehicle information.

[0053] Positive and negative lines

[0054] like Figure 1 As shown, the first wire 201 branches into four wires from the first main wiring, including: a first positive wire 201a, a second positive wire 201b, a third positive wire 201c, and a fourth positive wire 201d. The second wire 202 branches into four wires from the second main wiring, including: a first negative wire 202a, a second negative wire 202b, a third negative wire 202c, and a fourth negative wire 202d.

[0055] The distal ends of a pair of first positive wires 201a and first negative wires 202a are provided in the first load connector 212. As a result, when the system relay 120 is turned on, the combined battery 110 and the first vehicle load 300 are electrically connected.

[0056] The distal ends of a pair of second positive lines 201b and second negative lines 202b are provided in the second load connector 213. A DC-DC converter circuit 220 is disposed on the second positive lines 201b and second negative lines 202b. As a result, when power is supplied to the DC-DC converter circuit 220, 12V DC power is supplied to the second vehicle load 400.

[0057] A pair of third positive lines 201c and third negative lines 202c are disposed at the distal ends of the DC power connector 214. DC relays 230 are disposed on the third positive lines 201c and third negative lines 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 supply 700. Furthermore, when the system relay 120 is turned on, the battery pack 110 is electrically connected to the DC power supply 700.

[0058] DC relay 230 is a mechanical switching element. DC relay 230 is a normally open switching element that is turned on by a drive signal from the power distribution ECU 260 and turned off by interrupting the drive signal. DC relay 230 corresponds to a switching element.

[0059] The fourth positive electrode line 201d is branched into two: the positive front line 201e and the positive rear line 201f. The fourth negative electrode line 202d is divided into two: the negative front line 202e and the negative rear line 202f. A fuse 240 is installed on each of these four lines.

[0060] The distal ends of a pair of positive front wires 201e and negative front wires 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 relay 120 is turned on, the battery pack 110 and the front PCU 500 are electrically connected.

[0061] The distal ends of a pair of positive rear wires 201f and negative rear wires 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, respectively. When the system relay 120 is turned on, the battery pack 110 and the rear PCU 600 are electrically connected.

[0062] Operation of power supply system

[0063] The operation of power supply system 10 is described below.

[0064] The battery ECU 140 activates the system relay 120 during normal periods, such as when the vehicle is parked or stopped, or during normal driving. Additionally, the battery ECU 140 deactivates the power relay 130. The power distribution ECU 260 deactivates the DC relay 230.

[0065] As a result, the on-board power of the battery pack 110 is supplied to the first vehicle load 300, the DC-DC converter circuit 220, the front PCU 500, and the rear PCU 600. Conversely, the regenerative 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 battery pack 110.

[0066] When the DC power supply 700 is connected to the power distribution unit 200 in a parked or stopped state during DC charging, the battery ECU 140 activates the system relay 120. Simultaneously, the battery ECU 140 deactivates the power relay 130. The power distribution ECU 260 activates the DC relay 230.

[0067] As a result, DC power supplied from DC power supply 700 is supplied to the battery pack 110, the first vehicle load 300, and the DC-DC converter circuit 220. The amount of power supplied to the first vehicle load 300 is determined based on the power requirements of the first vehicle load 300.

[0068] When the AC power supply 800 is connected to the power distribution device 200 in a parked or stopped state during AC charging, the battery ECU 140 activates the system relay 120 and the power relay 130, respectively. The power distribution ECU 260 deactivates the DC relay 230.

[0069] As a result, AC power supplied from AC power source 800 is converted into DC power via AC-DC converter circuit 250. This DC power is then supplied to battery pack 110, first vehicle load 300, and DC-DC converter circuit 220. The amount of power supplied to the first vehicle load 300 is determined based on its power requirements.

[0070] Vehicle status

[0071] Next, refer to Figure 2 The on-board status of the power distribution device 200 is described. Figure 2 Part of the wiring, DC-DC converter circuit 220, DC relay 230, fuse 240, AC-DC converter circuit 250, and power distribution ECU 260 are not shown. Furthermore, illustrations of the cover components, described later, are omitted.

[0072] In the following text, the three mutually orthogonal directions are referred to as the x-direction, y-direction, and z-direction. One of the x-direction and y-direction corresponds to the left and right directions of the vehicle, and the other corresponds to the front and rear directions of the vehicle, i.e., the direction of travel and the direction of reversing. The z-direction corresponds to the top and bottom directions of the vehicle.

[0073] In addition to the electrical equipment described herein, the power distribution device 200 also includes Figure 2 The housing 270 and the cover member that closes the opening of the housing 270 are shown. The housing 270 may be referred to as a frame. The housing 270 has a bottom wall 271 and side walls 272, the bottom wall 271 being thinner in the z-direction, and the side walls 272 rising in an annular shape from the inner bottom surface 271a of the bottom wall 271 in the z-direction.

[0074] The outer bottom surface on the rear side of the inner bottom surface 271a is positioned relative to the inner bottom surface 271a on the side closer to the chassis of the vehicle in the z-direction. The flange portion 271c for bolting the power distribution device 200 to the chassis is integrally connected to the bottom wall 271 on which the outer bottom surface is provided.

[0075] Inner and outer walls

[0076] like Figure 2 As shown, sidewall 272 includes an inner horizontal wall 273 and an outer horizontal wall 274 arranged separately from each other in the x-direction. Sidewall 272 also includes an inner vertical wall 275 and an outer vertical wall 276 arranged separately from each other in the y-direction. Sidewall 272 forms an annular shape by connecting these four walls side by side in the circumferential direction around the z-direction.

[0077] These four walls are arranged so that they face the horizontal side of the vehicle in the vehicle's installed state. In the x-direction, the inner horizontal wall 273 is arranged inside the vehicle, instead of the outer horizontal wall 274. In the y-direction, the inner vertical wall 275 is arranged inside the vehicle, instead of the outer vertical wall 276.

[0078] Connector layout

[0079] The four walls of sidewall 272 have formed notches, openings, etc., to accommodate the distribution connector 210. Of the four walls, the power connector 211, the front power connector 215, and the rear power connector 216 are disposed on the inner horizontal wall 273 or the inner vertical wall 275, which are arranged opposite each other inside the vehicle. The DC power connector 214 and the AC power connector 217 are disposed on the outer horizontal wall 274 or the outer vertical wall 276, which are arranged opposite each other outside the vehicle. The first load connector 212 and the second load connector 213 can be disposed on any of these four walls.

[0080] As described above, the power connector 211, the front power connector 215, and the rear power connector 216 are positioned further inside the vehicle than the DC external power connector 214 and the AC external power connector 217. In this way, the connectors used during vehicle operation are positioned further inside the vehicle than the connectors used when external power is supplied.

[0081] like Figure 2 Specifically, in this embodiment, the inner vertical wall 275 is provided with a power connector 211, a front power connector 215, and a rear power connector 216. On the inner vertical wall 275, the power connector 211, the front power connector 215, and the rear power connector 216 are arranged adjacent to each other in the x-direction.

[0082] DC power connector 214 and AC power connector 217 are disposed on the outer vertical wall 276. Second load connector 213 is disposed on the inner horizontal wall 273. First load connector 212 is disposed on the outer horizontal wall 274.

[0083] The second load connector 213 is used to supply 12V DC power to onboard equipment involved in vehicle driving functions. Therefore, preferably, the second load connector 213 is arranged further inside the vehicle than the DC power connector 214 and the AC power connector 217. In this embodiment, the second load connector 213 is disposed on the inner horizontal wall 273, and on a portion of the inner horizontal wall 273 further inside the inner vertical wall 275 in the y-direction.

[0084] Arrangement of electrical components

[0085] If the electrical equipment housed in the housing 270 is classified as: a first equipment group including equipment used during vehicle operation; and a second equipment group including equipment used during external power supply, then the equipment in the first equipment group is arranged further inside the vehicle than the equipment in the second equipment group.

[0086] The first device group includes a DC-DC converter circuit 220, a fuse 240, and a power distribution ECU 260. The second device group includes a DC relay 230 and an AC-DC converter circuit 250. The power distribution ECU 260 is used both during driving and when supplying external power, but is included in the first device group because it is associated with drive control during driving. However, a configuration in which at least a portion of the first device group is located further outward from the vehicle than the second device group is also possible.

[0087] power line

[0088] For convenience, in the first wire 201, the portions connecting the power connector 211 and the front power connector 215, and the portions connecting the power connector 211 and the rear power connector 216, are collectively referred to as the first power supply line 205. In the second wire 202, the portions connecting the power connector 211 and the front power connector 215, and the portions connecting the power connector 211 and the rear power connector 216, are collectively referred to as the second power supply line 206.

[0089] Figure 2 A first power supply line 205 and a second power supply line 206 are briefly shown. One end of the pair of first power supply lines 205 and 206 is provided in a power connector 211. The other end of the pair of first power supply lines 205 and 206 is branched into multiple connectors. The other end of the pair of first power supply lines 205 and 206 is provided in a front power connector 215. The other end of the pair of first power supply lines 205 and 206 is provided in a rear power connector 216.

[0090] The first power supply line 205 and the second power supply line 206 are located further inside the vehicle than the AC power connector 217 and DC power connector 214 used during external power supply. In this embodiment, the first power supply line 205 and the second power supply line 206 are located on the side closer 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 arranged along the inner wall, i.e., along the inner vertical wall 275.

[0091] The first power supply line 205 includes a positive common line 201g and a fourth positive line 201d as described above. The positive common line 201g is included in the first main wiring as described above. The fourth positive line 201d has a positive front line 201e and a positive rear line 201f as described above.

[0092] One end of the positive common line 201g corresponds to one end of the first power supply line 205 and is disposed in the power 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 the first branch point where the two positive lines branch off.

[0093] The other ends of the positive front wire 201e and the positive rear wire 201f correspond to the other ends of the first power supply line 205. The other end of the positive front wire 201e is disposed in the front power connector 215. The other end of the positive rear wire 201f is disposed in the rear power connector 216.

[0094] The second power supply line 206 includes a common negative line 202g and a fourth negative line 202d as described above. The common negative line 202g is included in the second main wiring as described above. The fourth negative line 202d has a negative front line 202e and a negative rear line 202f as described above.

[0095] One end of the negative common wire 202g corresponds to one end of the second power supply wire 206 and is disposed in the power connector 211. One end of the negative front wire 202e and one end of the negative rear wire 202f are connected to the other end of the negative common wire 202g. The other end of the negative common wire 202g is the second branch point that branches into the two negative wires.

[0096] The other ends of the negative front wire 202e and the negative rear wire 202f correspond to the other ends of the second power supply line 206. The other end of the negative front wire 202e is disposed in the front power connector 215. The other end of the negative rear wire 202f is disposed in the rear power connector 216.

[0097] The positive common wire 201g and the negative common wire 202g extend in the y-direction and then in the x-direction to separate from the power connector 211. The positive common wire 201g and the negative common wire 202g have the same length. The positive common wire 201g and the negative common wire 202g extend in both the x and y directions, such that these wires are arranged adjacent to each other and extend parallel to each other.

[0098] The positive front wire 201e extends from the first branch point of the positive common wire 201g toward the front power connector 215. The positive rear wire 201f extends from the first branch point toward the rear power connector 216. These two positive wires are shorter than the positive common wire 201g.

[0099] The negative front wire 202e extends from the second branch point of the negative common wire 202g toward the front power connector 215. The negative rear wire 202f extends from the second branch point toward the rear power connector 216. These two negative wires are shorter than the negative common wire 202g.

[0100] The positive electrode front wire 201e and the negative electrode front wire 202e have the same length. These two front wires extend in the x and y directions, such that they are arranged adjacent to each other and extend parallel to each other.

[0101] The positive electrode back line 201f and the negative electrode back line 202f have the same length. These two back lines extend in the x and y directions, such that they are arranged adjacent to each other and extend parallel to each other.

[0102] A positive common line 201g corresponds to a common conductive member. A negative common line 202g corresponds to a common conductive member. Positive common line 201g and negative common line 202g provide two common conductive members. Positive front line 201e and positive rear line 201f correspond to branch conductive members for the first power supply line 205. Negative front line 202e and negative rear line 202f correspond to branch conductive members for the second power supply line 206. Positive front line 201e and positive rear line 201f, negative front line 202e and negative rear line 202f provide four branch conductive members. The first power supply line 205 corresponds to a conductive member. The second power supply line 206 corresponds to a conductive member. The first power supply line 205 and the second power supply line 206 provide two conductive members.

[0103] First filter

[0104] In addition to the electrical equipment described herein, the power distribution device 200 has at least one first filter 291. For example... Figure 2As shown, the power distribution device 200 may have two first filters 291. One of the first filters 291 is disposed on the first power supply line 205. The other of the first filters 291 is disposed on the second power supply line 206. As a result, the first filters 291 are disposed on the first power supply line 205 and the second power supply line 206, respectively. The first filters 291 have the function of reducing noise components on the current, such as ripple 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 cancellation element.

[0105] The frequency band of the noise component in the current is approximately 2.0 MHz. For example, ferrite cores, capacitors, and filter circuits can be used as components with noise reduction capabilities. For example, spinel ferrite, hexagonal crystal ferrite, and garnet ferrite can be used as ferrites. These components can be used as the first filter 291.

[0106] When a ferrite core is used as the first filter 291, the first filter 291 can be arranged on two common lines, such that the first filter 291 jointly surrounds the parallel-extending positive common line 201g and negative common line 202g. Therefore, although Figure 2 The diagram shows two first filters 291 respectively disposed on two common lines, but it is possible to use a single first filter 291 disposed on both common lines.

[0107] When a capacitor is used as the first filter 291, two capacitors are respectively arranged on the two common lines. For example, at least one first capacitor is arranged such that one of its two capacitor electrodes is connected to the positive common line 201g. The other of the two capacitor electrodes of the first capacitor is grounded. At least one second capacitor, different from the first capacitor, is arranged such that one of its two capacitor electrodes is connected to the negative common line 202g. The other of the two capacitor electrodes of the second capacitor is grounded. Two of the other capacitor electrodes of the first and second capacitors can be connected as a single wiring, and this single wiring can be grounded.

[0108] like Figure 2Simply put, the first filter 291, disposed on the first power supply line 205 and the second power supply line 206, is located on the portion closer to the other end, i.e., the branch end. On both the first power supply line 205 and the second power supply line 206, the first filter 291 is located on the portion further from one end to the other. In the first power supply line 205, the total length from the portion where the first filter 291 is disposed to the end disposed in the power connector 211 is a first distance L1. In the second power supply line 206, the total length from the portion where the first filter 291 is disposed to the end disposed in the power connector 211 is the first distance L1. Although the first distance L1 may differ slightly in the first power supply line 205 and the second power supply line 206, it can be considered the same. In the first power supply line 205, the total length from the portion where the first filter 291 is disposed to the other end disposed in the front power connector 215 or the rear power connector 216 is a second distance L2. In the second power supply line 206, the total length from a portion of the first filter 291 to the other end located in the front power connector 215 or the rear power connector 216 is the second distance L2. Although the second distance L2 may differ slightly in the first power supply line 205 and the second power supply line 206, it can be considered to be the same. The second distance L2 is shorter than the first distance L1 (L2 < L1).

[0109] As described above, the first filter 291 is disposed on a portion of the power supply line further from one end to the other. The first filter 291 is disposed on a portion of the positive common line 201g and / or the negative common line 202g. The first filter 291 is still disposed on the positive common line 201g and / or the negative common line 202g, and is not disposed on any one 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 disposed on a portion of at least one of the positive common line 201g and the negative common line 202g further from one end to the other. In other words, the first filter 291 is disposed on a portion of the common line near the branch point and branches to both the positive front line 201e and the positive rear line 201f, or both the negative front line 202e and the negative front line 202f.

[0110] Functions and advantages

[0111] As described above, the first filter 291 is disposed on the first power supply line 205 and the second power supply line 206. Accordingly, current noise flowing into the power distribution device 200 from the front PCU 500 and the rear PCU 600 can be reduced. This current noise is suppressed from entering the battery pack 100.

[0112] As described above, the first power supply line 205 has a positive front line 201e, a positive rear line 201f, and a positive common line 201g that is connected to both positive lines. The first filter 291 is disposed on the positive common line 201g.

[0113] Similarly, the second power supply line 206 has a negative front line 202e, a negative rear line 202f, and a negative common line 202g that is connected to both negative lines. The first filter 291 is disposed on the negative common line 202g.

[0114] Accordingly, compared with the construction of setting multiple first filters 291 on each of the front and rear lines, the increase in the number of elements can be suppressed.

[0115] Furthermore, when a ferrite core is used as the first filter 291, a single first filter 291 is disposed on both the positive common line 201g and the negative common line 202g extending side by side. The ferrite core can provide a single magnetic circuit around both the positive common line 201g and the negative common line 202g. The single first filter 291 serves as a common element on both the positive common line 201g and the negative common line 202g. As a result, compared to the construction of distributing two first filters 291 on each of the two common lines, the increase in the number of elements can be suppressed.

[0116] Of course, it is possible to prevent the noise component on the current from being reduced before it enters the first filter 291. The noise component can propagate electromagnetic noise while flowing from the other end of each of the first power supply line 205 and the second power supply line 206 to the portion where the first filter 291 is located. The electromagnetic noise can propagate into the inner cavity of the housing 270.

[0117] On the other hand, the first filter 291 is disposed on the other end of the first power supply line 205 and the second power supply line 206. More specifically, the first filter 291 is disposed on a portion of at least one of the positive common line 201g and the negative common line 202 that is further from one end than the other. In other words, the first filter 291 is disposed on a portion of the common line near the branch point and branches to both the positive front line 201e and the positive back line 201f, or both the negative front line 202e and the negative front line 202f. Therefore, current noise flows through the common line until it reaches the first filter 291. The distance of the common line through which the current noise flows is shortened. For example, the current noise flows only from the branch point to the first filter 291 in the common line. As a result, the propagation of electromagnetic noise entering the cavity of the housing 270 can be reduced.

[0118] Each of the positive electrode front line 201e and the positive electrode rear line 201f is shorter than the positive electrode common line 201g. Each of the negative electrode front line 202e and the negative electrode rear line 202f is shorter than the negative electrode common line 202g.

[0119] Accordingly, the distance that current noise flows between the two positive branches and the two negative branches is shortened. As a result, the propagation of electromagnetic noise into the cavity of the housing 270 can be reduced.

[0120] The power connector 211, the front power connector 215, and the rear power connector 216 used during vehicle operation are positioned further inside the vehicle than the other connectors.

[0121] Therefore, damage to the power connector 211, front power connector 215, and rear power connector 216 due to external forces applied from the outside to the inside of the vehicle can be prevented. Interference in the power supply to the front PCU 500 and rear PCU 600 by the battery pack 100 can be prevented. As a result, problems in supplying power to the front MG 510 and rear MG 610 can be prevented. The vehicle can be prevented from becoming difficult to drive due to external forces.

[0122] In addition, the first power supply line 205 and the second power supply line 206 are electrically connected to a pair of power connectors 211 and the front power connector 215, and a pair of power connectors 211 and the rear power connector 216.

[0123] Therefore, these power supply lines can be prevented from failing due to external forces. This prevents malfunctions when the vehicle is supplying power to the front MG 510 and rear MG 610.

[0124] As described above, the power connector 211, the front power connector 215 and the rear power connector 216, as well as the second power supply line 206 and the first power supply line 205 connecting these three connectors, are disposed on the inside of the vehicle.

[0125] Specifically, in this embodiment, power connector 211, front power connector 215, and rear power connector 216 are disposed on the inner vertical wall 275. These three connectors are arranged adjacent to each other in the x-direction. First power supply line 205 and second power supply line 206 are disposed in the y-direction near the inner vertical wall 275. Both first power supply line 205 and second power supply line 206 are arranged along the inner vertical wall 275. Due to this arrangement, the increase in wiring length for each of the first power supply line 205 and second power supply line 206 can be reduced.

[0126] The DC-DC converter circuit 220, fuse 240, and power distribution ECU 260, which are included in the first equipment group used when the vehicle is in motion, are located on the inside of the vehicle.

[0127] Therefore, it can prevent the first equipment group from malfunctioning due to external forces applied to the vehicle. It can also prevent malfunctions when supplying power to the MG.

[0128] Second Implementation Method

[0129] Next, refer to Figure 3 The second implementation method will be described below.

[0130] The first embodiment shows an example where the first filter 291 is disposed on a portion near the other end of the positive common line 201g and the negative common line 202g. On the other hand, in this embodiment, for example, as... Figure 3 As shown, the first filter 291 is disposed on the portion near the other end of the positive common line 201g and the negative common line 202g, and the second filter 292 is disposed on the portion near one end of the positive common line 201g and the negative common line 202g. In this embodiment, the power connector 211 is disposed on the inner horizontal wall 273, and on the portion of the inner horizontal wall 273 near the inner vertical wall 275.

[0131] The second positive line 201b is connected to the midpoint between the portion on the positive common line 201g where the first filter 291 is arranged and the portion where the second filter 292 is arranged. The second negative line 202b is connected to the midpoint between the portion on the negative common line 202g where the first filter 291 is arranged and the portion where the second filter 292 is arranged. As described above, the DC-DC converter circuit 220 is disposed on the second positive line 201b and the second negative line 202b.

[0132] The DC-DC converter circuit 220 corresponds to a power converter circuit. The second positive line 201b corresponds to an internal conductive component. The negative line 202b corresponds to an internal conductive component. The second positive line 201b and the second negative line 202b provide two internal conductive components. The second filter 292 corresponds to a noise filter.

[0133] The second filter 292 has the 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 elements included in the DC-DC converter circuit 220, and its frequency band is approximately 1.0 MHz. As mentioned above, the frequency band of the current noise to be reduced is different between the second filter 292 and the first filter 291. For example, ferrite cores and capacitors can be used as components with noise reduction function.

[0134] Current noise can enter from the front PCU 500 and / or the rear PCU 600. Current noise can also enter from the DC-DC converter circuit 220. Based on the above configuration, current noise flowing through the positive common line 201g and the negative common line 202g can be suppressed. Current noise input from the front PCU 500 and the rear PCU 600 is suppressed from entering the DC-DC converter circuit 220.

[0135] The power distribution device 200 described in this embodiment includes components equivalent to those in the power distribution device 200 described in the first embodiment. Therefore, similar effects can be provided. This also applies to the embodiments shown below. This description will be omitted below.

[0136] Third Implementation Method

[0137] Next, refer to Figure 4 The third implementation method will be described below.

[0138] The second embodiment shows an example where the second filter 292 is disposed on each of the positive common line 201g and the negative common line 202g. On the other hand, this embodiment shows a construction of the second filter 292 disposed on the second positive line 201b and the second negative line 202b, respectively.

[0139] According to this configuration, current noise can be output from the DC-DC converter circuit 220, which can reduce the current noise entering the front PCU 500 and the rear PCU 600. Conversely, current noise can be output from the front PCU 500 and the rear PCU 600, which can reduce the current noise entering the DC-DC converter circuit 220.

[0140] In this embodiment, the front power connector 215 and the rear power connector 216 are disposed on the outer horizontal wall 274 and on the portion of the outer horizontal wall 274 near the inner vertical wall 275.

[0141] Although this disclosure has been described with reference to preferred embodiments, it is not limited to the embodiments described above, but can be implemented by various modifications without departing from the spirit of this disclosure.

[0142] Other variations

[0143] In the previous embodiment, an example was shown where the system is provided with both a front MG 510 and a rear MG 610. However, it is also possible to adopt a configuration where the system is provided with only one of the two MGs, the front MG 510 or the rear MG 610. When only one of these two MGs is provided in the system, the system is provided with only one of the two MGs, either the front MG 510 or the rear MG 610.

[0144] As stated above, it should be understood that the following technical solutions are disclosed in this specification.

[0145] Disclosure 1. A power distribution device, comprising: a power connector (211) connected to an on-board power supply (100); a plurality of power connectors (215, 216) respectively connectable to a plurality of on-board power converter circuits (500, 600) and capable of supplying power to a plurality of on-board electrical devices (510, 610); at least one conductive member (205, 206) having a common conductive member (201g, 202g) connected to the power connector and a plurality of branch conductive members (201e, 201f, 202e, 202f) branching from the common conductive member to the power connector; and a noise reduction element (291) disposed on the common conductive member.

[0146] Disclosure 2. The power distribution device of Disclosure 1, wherein a noise reduction element is disposed on the portion of a common conductive member near a branch conductive member.

[0147] Disclosure 3. The power distribution device of Disclosure 1 or 2, wherein each of the plurality of branch conductive members has a shorter length than the common conductive member.

[0148] Disclosure 4. A power distribution device according to any one of disclosures 1 to 3, wherein a power connector and a plurality of power connectors are arranged adjacent to each other.

[0149] Disclosure 5. A power distribution device according to any one of disclosures 1 to 4, further comprising: a power converter circuit (220) connected to a power connector; an internal conductive member (201b, 202b) connecting the power converter circuit and a common conductive member; and a noise filter (292) disposed on the internal conductive member or the common conductive member.

[0150] Disclosure 6. The power distribution device of Disclosure 5, wherein a noise filter is disposed on a common conductive member, and wherein an internal conductive member is connected to a portion of the common conductive member between the portion of the common conductive member where the noise filter is disposed and the portion of the common conductive member where a noise reduction element is disposed.

[0151] Disclosure 7. The power distribution device of Disclosure 5, wherein a noise filter is disposed on an internal conductive member, and wherein the internal conductive member is connected to a common conductive member, between a portion of the common conductive member in which a noise reduction element is disposed and a portion of the common conductive member in which a power connector is connected.

Claims

1. A power distribution device, comprising: A power connector that connects to the vehicle's power supply; Multiple power connectors, which can be connected to multiple on-board power converter circuits respectively and can supply power to multiple on-board electrical devices respectively; At least one conductive member, the conductive member having a common conductive member connected to a power connector and a plurality of branch conductive members branching from the common conductive member to the power connector; as well as Noise reduction element, the noise reduction element being disposed on a common conductive member, The power distribution device also includes: A power converter circuit, the power converter circuit being connected to the power connector; Internal conductive components, which connect the power converter circuit and the common conductive component; and A noise filter is disposed on the internal conductive member or the common conductive member.

2. The power distribution device as described in claim 1, characterized in that, The noise reduction element is disposed on the portion of the common conductive member near the branch conductive member.

3. The power distribution device as described in claim 1, characterized in that, Each of the plurality of branch conductive members has a shorter length than the common conductive member.

4. The power distribution device as described in claim 1, characterized in that, The power connector and the plurality of power connectors are arranged adjacent to each other.

5. The power distribution device as described in claim 1, characterized in that, The noise filter is disposed on the common conductive member, and wherein the internal conductive member is connected to the portion of the common conductive member between the portion of the common conductive member where the noise filter is disposed and the portion of the common conductive member where the noise reduction element is disposed.

6. The power distribution device as described in claim 1, characterized in that, The noise filter is disposed on the internal conductive member, and wherein, The internal conductive member is connected to the common conductive member, between the portion of the common conductive member in which the noise reduction element is disposed and the portion of the common conductive member connected to the power connector.

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