WO2023238651A1 - Power supply unit and power supply system - Google Patents

Abstract

This power supply unit (20) comprises: an electrical component (26); a first conductive member (23E, 23F) that is connected to the electrical component; a second conductive member (21D, 22D) that has a different current passage timing than the first conductive member does; and a first partition wall (91) and a second partition wall (29) that are provided apart from each other with respect to an arrangement direction in which the first conductive member and the second conductive member are arranged, wherein the first conductive member and the second conductive member are provided between the first partition wall and the second partition wall. As a result, it is possible to achieve both an improvement in the freedom of arrangement of the two conductive members and the suppression of noise intrusion into the electrical component, which connects from one of the conductive members to the other of the conductive members.

Description

Power supply unit and power supply system Cross-reference of related applications

This application is based on Patent Application No. 2022-094442 filed in Japan on June 10, 2022, and the content of the underlying application is incorporated by reference in its entirety.

The disclosure described herein relates to a power supply unit and a power supply system.

Patent Document 1 describes an engine control device that includes an injector wire harness that is connected to an injector drive unit, a control wire harness that connects an ECU and various sensors, and an intake manifold. The intake manifold has a shielding effect that suppresses electromagnetic noise generated from the injector wire harness from entering the control wire harness. An intake manifold is provided between the injector wire harness and the control wire harness.

Japanese Patent Application Publication No. 11-343861

Because a member with a shielding effect is provided between the two wire harnesses, the degree of freedom in arranging the two wire harnesses is low. Furthermore, it has been difficult to suppress noise from entering electrical components connected from one wire harness to the other wire harness.

An object of the present disclosure is to provide a power supply unit that is capable of improving the degree of freedom in arrangement of two conductive members and suppressing noise from entering electrical components connected from one conductive member to the other conductive member; and to provide a power supply system.

A power supply unit according to one aspect of the present disclosure includes:
electrical parts and
a first conductive member connected to the electrical component;
a second conductive member having a different energization timing from the first conductive member;
A first partition wall and a second partition wall are provided apart from each other with respect to the direction in which the first conductive member and the second conductive member are lined up,
A first conductive member and a second conductive member are provided between the first partition wall and the second partition wall.

Since the first conductive member and the second conductive member have different energization timings, it is possible to suppress noise from entering the electrical component due to the energization of the second conductive member. There is no need to provide a member between the first conductive member and the second conductive member to shield noise propagated between the first conductive member and the second conductive member. Furthermore, the degree of freedom in arranging the first conductive member and the second conductive member between the first partition wall and the second partition wall is improved.

A power supply system according to one aspect of the present disclosure includes:
electrical parts and
a first conductive member connected to the electrical component;
a second conductive member having a different energization timing from the first conductive member;
A power supply unit having a first partition wall and a second partition wall that are provided apart from each other with respect to the direction in which the first conductive member and the second conductive member are lined up;
A switching device that switches between a energized state and a non-energized state of the first conductive member and the second conductive member,
A first conductive member and a second conductive member are provided between the first partition wall and the second partition wall.

The power supply system includes a power supply unit. Since the first conductive member and the second conductive member have different energization timings, it is possible to suppress noise from entering the electrical component due to the energization of the second conductive member. The degree of freedom in arranging the first conductive member and the second conductive member between the first partition wall and the second partition wall is improved.

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

FIG. 1 is a block diagram of a power supply system and a power supply unit. FIG. 2 is a block diagram illustrating energization timing. It is a flow chart explaining control of energization timing. It is a timing chart of energization timing. FIG. 3 is a plan view of the power supply unit. FIG. 3 is a cross-sectional view of the power supply unit. FIG. 1 is a block diagram of a power supply system and a power supply unit. FIG. 2 is a block diagram illustrating a method of controlling energization timing. FIG. 1 is a block diagram of a power supply system and a power supply unit. FIG. 3 is a cross-sectional view of the power supply unit. FIG. 3 is a cross-sectional view of the power supply unit.

Hereinafter, multiple embodiments for carrying out the present disclosure will be described with reference to the drawings. In each form, parts corresponding to matters explained in the preceding form may be given the same reference numerals and redundant explanation may be omitted. When only a part of the configuration is described in each form, the other forms previously described can be applied to other parts of the structure.

In addition, it is not only possible to combine parts that are explicitly shown to be combinable in each embodiment, but also to combine embodiments with each other even if it is not explicitly stated, or between embodiments and modified examples, as long as there is no particular problem with the combination. It is also possible to partially combine the modified examples.

(First embodiment)
A power supply system 1 and a power supply unit 20 according to the present embodiment will be explained based on FIGS. 1 to 6. The power supply system 1 and the power supply unit 20 are applied to electric vehicles such as electric vehicles and plug-in hybrid vehicles. In this embodiment, a configuration in which the power supply system 1 and the power supply unit 20 are applied to an electric vehicle will be described as an example.

<Power supply system>
As shown in FIG. 1, the power supply unit 20 is included in the vehicle power supply system 1. In addition to the power supply unit 20, the power supply system 1 includes a battery pack 10, a first vehicle load 30, a second vehicle load 40, a PCU 50, an MG 51, and a vehicle ECU 52. A DC power supply 70 and an AC power supply 80 are connected to this power supply system 1 from the outside. PCU is an abbreviation for Power Control Unit. MG is an abbreviation for Motor Generator. ECU is an abbreviation for electronic control unit.

In the drawings, the in-vehicle ECU 52 is abbreviated as "PCECU". Further, in the drawings, in order to simplify the explanation, a configuration in which the power supply system 1 is provided with one PCU 50 and one MG 51 is illustrated. However, the power supply system 1 may be provided with a plurality of PCUs 50 and a plurality of MGs 51. For example, the power supply system 1 may include an FrPCU that drives and controls the FrMG and an RrPCU that drives and controls the RrMG.

As a power supply path, the battery pack 10 and the power supply unit 20 are electrically connected via a conductive member such as a wire harness or a bus bar. A first vehicle load 30 and a second vehicle load 40 are electrically connected to the power supply unit 20 via a conductive member. A PCU 50 is electrically connected to the power supply unit 20 via a conductive member. The MG 51 is electrically connected to the PCU 50 via a conductive member.

Note that in the following description, what is called a line corresponds to a conductive member such as a wire harness or a bus bar. The PCU 50 also includes an inverter and a converter for converting power. A plurality of switches included in these inverters and converters are on/off controlled by an on-vehicle ECU 52. The PCU 50 is controlled by an on-vehicle ECU 52.

The DC power output from the battery pack 10 is supplied to the first on-vehicle load 30, the second on-vehicle load 40, and the PCU 50 via the power supply unit 20. As described above, the PCU 50 includes an inverter and a converter for performing power conversion. The PCU 50 converts the supplied DC power into AC power. Conversely, the PCU 50 converts the supplied AC power into DC power. MG51 is a motor generator for driving the vehicle to provide propulsive force to the vehicle. The MG51 is powered by AC power supplied from the PCU50.

The wheels rotate due to the power running of MG51. The MG51 generates regenerative power using the vehicle's propulsion force. The AC power generated by this regenerative power generation is converted into DC power by the PCU 50. This DC power is supplied to the first on-vehicle load 30 and the second on-vehicle load 40 via the power supply unit 20. This DC power is supplied to the battery pack 10 via the power supply unit 20.

Hereinafter, for ease of notation, the DC power supplied from the battery pack 10 will be referred to as power source power. The power generated by regenerative power generation and converted into DC power by the PCU 50 is referred to as regenerative power. The power supply unit 20 functions to supply power source power and regenerated power output inside the vehicle to various electrical devices mounted on the vehicle. Further, the power supply unit 20 has a function of supplying charging power supplied from an external power source to various electrical devices mounted on the vehicle. Hereinafter, the components included in the battery pack 10 and the power supply unit 20 will be explained individually.

<Battery pack>
The battery pack 10 includes a battery pack 11, an SMR 12, a power relay 13, a battery ECU 14, and battery connectors 15A and 15B. The driving of the SMR 12 and the power relay 13 is controlled by the battery ECU 14. The output to the battery connectors 15A and 15B is controlled to be energized and cut off by driving the SMR 12 and the power relay 13. Note that in the drawings, the battery ECU 14 is abbreviated as "BAECU".

The assembled battery 11 has a plurality of battery cells connected in series. The voltage corresponding to the potential difference between the positive terminal of the battery cell with the highest potential among the plurality of battery cells connected in series and the negative terminal of the battery cell with the lowest potential corresponds to the power supply voltage of the battery pack 11. As the battery cells included in this assembled battery 11, for example, a secondary battery such as a lithium ion battery can be employed. One end of the first power supply line 10A is connected to the positive terminal of the battery cell located at the highest potential among the plurality of battery cells connected in series. One end of the second power supply line 10B is connected to the negative terminal of the battery cell located at the lowest potential. The other end of the first power line 10A and the other end of the second power line 10B are provided in the first battery connector 15A.

SMRs 12 are provided on the first power line 10A and the second power line 10B. The SMR 12 is a mechanical switch element. The SMR 12 is a switch element that is switched between an on state and an off state by inputting a drive signal output from the battery ECU 14. SMR is an abbreviation for System Main Relay.

One end of the third power line 10C is connected to the midpoint between the assembled battery 11 and the SMR 12 on the first power line 10A. One end of the fourth power line 10D is connected to the middle point between the assembled battery 11 and the SMR 12 on the second power line 10B. The other end of the third power line 10C and the other end of the fourth power line 10D are provided in the second battery connector 15B. A power relay 13 is provided on the third power line 10C and the fourth power line 10D. Power supply relay 13 is a mechanical switch element.

The power relay 13 is a switch element that is switched between an on state and an off state by inputting a drive signal output from the battery ECU 14. The battery ECU 14 communicates with an on-vehicle ECU 52 and a power supply ECU 26 (described later) via wiring (not shown). The battery ECU 14 controls the driving of the SMR 12 and the power relay 13 based on communication with these ECUs.

As described above, the first battery connector 15A is provided with the other ends of the first power line 10A and the second power line 10B. The other ends of the third power line 10C and the fourth power line 10D are provided. Electrical connection and disconnection with the assembled battery 11 on the other end side of these four power supply lines is controlled by outputting and not outputting drive signals from the battery ECU 14 to the SMR 12 and the power relay 13. The other ends of these four power lines are connected to the power supply unit 20.

<Power supply unit>
Power supply unit 20 includes DC relays 23A, 23B, DCDC converter 24, ACDC converter 25, power supply ECU 26, and distribution connector 28. DC relays 23A and 23B are mechanical switches. The DC relays 23A and 23B are switches that are switched between an on state and an off state by inputting a drive signal output from the power supply ECU 26. The DC/DC converter 24 steps down the supplied power to 12V and supplies it to the second on-vehicle load 40. ACDC converter 25 converts AC power supplied from AC power supply 80 into DC power. Note that in the drawings, the power supply ECU 26 is abbreviated as "PDECU". The power supply ECU 26 corresponds to an electrical component. The power supply ECU 26 may also be referred to as a control device.

The power supply ECU 26 communicates with the vehicle ECU 52 and the battery ECU 14 via wiring (not shown). The power supply ECU 26 controls the driving of the DCDC converter 24, the DC relays 23A and 23B, and the ACDC converter 25 based on communication with these ECUs and vehicle signals including vehicle information input from onboard sensors (not shown). The distribution connector 28 has a first power connector 28A, a second power connector 28B, a first load connector 28C, a second load connector 28D, a DC connector 28E, a PCU connector 28F, and an AC power connector 28G.

The first power connector 28A is provided with one end of the first power line 20A and the second power line 20B. The first battery connector 15A of the battery pack 10 is electrically connected to the first power supply connector 28A. The other end of the first power line 10A is connected to one end of the first power line 20A. The other end of the second power line 10B is connected to one end of the second power line 20B. As a result, the SMR 12 of the battery pack 11 is in the ON state, and the first power line 20A and the second power line 20B are electrically connected to the battery pack 11. When the SMR 12 is in the off state, the electrical connection between the assembled battery 11 of the first power line 20A and the second power line 20B is cut off.

The first power line 20A branches into a plurality of positive electrode lines. Similarly, the second power line 20B branches into a plurality of negative electrode lines. Tips of the plurality of positive electrode lines are provided at the first load connector 28C, second load connector 28D, DC connector 28E, and PCU connector 28F as the other ends of the first power line 20A. Tips of the plurality of negative electrode lines are provided at the first load connector 28C, second load connector 28D, DC connector 28E, and PCU connector 28F as the other ends of the second power line 20B. Note that DC relays 23A, 23B and a DC/DC converter 24 are provided on the positive line and the negative line. The positive electrode line and negative electrode line will be explained in detail later.

The second power connector 28B is provided with one end of the third power line 20C and the fourth power line 20D. The second battery connector 15B of the battery pack 10 is electrically connected to the second power supply connector 28B. The other end of the third power line 10C is connected to one end of the third power line 20C. The other end of the fourth power line 10D is connected to one end of the fourth power line 20D. When the power relay 13 of the assembled battery 11 is in the ON state, the third power line 20C and the fourth power line 20D are electrically connected to the assembled battery 11. When the power relay 13 is in the OFF state, the electrical connection between the assembled battery 11 of the third power line 20C and the fourth power line 20D is cut off.

An ACDC converter 25 is provided on the third power line 20C and the fourth power line 20D. The other end of the third power line 20C and the other end of the fourth power line 20D are provided at the AC power connector 28G. An AC power source 80 is connected to this AC power connector 28G from the outside. As a result, the power relay 13 is turned on, and the assembled battery 11 and the AC power source 80 are electrically connected via the ACDC converter 25.

<Positive line and negative line>
As shown in FIG. 1, the first power line 20A branches from the first main wiring into four lines: a first positive line 21A, a second positive line 21B, a third positive line 21C, and a fourth positive line 21D. are doing. The second power line 20B branches from the second main wiring into four lines: a first negative line 22A, a second negative line 22B, a third negative line 22C, and a fourth negative line 22D.

The tip of the first positive line 21A and the tip of the first negative line 22A are provided in the first load connector 28C. Thereby, the assembled battery 11 and the first on-vehicle load 30 are electrically connected with the SMR 12 in the on state. The tip of the second positive line 21B and the tip of the second negative line 22B are provided in the second load connector 28D. A DCDC converter 24 is provided on the second positive line 21B and the second negative line 22B. Thereby, when power is supplied to the DCDC converter 24, 12V DC power is supplied to the second on-vehicle load 40.

The tip of the third positive electrode line 21C and the tip of the third negative electrode line 22C are provided in the DC connector 28E. DC relays 23A and 23B are provided on the third positive line 21C and the third negative line 22C. The DC relays 23A and 23B include a first DC relay 23A and a second DC relay 23B. A first DC relay 23A is provided on the third positive electrode line 21C. A second DC relay 23B is provided on the third negative electrode line 22C. With the DC relays 23A and 23B in the on state, the first on-vehicle load 30 and the DCDC converter 24 are electrically connected to the DC power supply 70. Further, the assembled battery 11 is electrically connected to the DC power source 70 while the SMR 12 is in the on state.

Furthermore, a first communication line 23C that communicates with the power supply ECU 26 is connected to the first DC relay 23A. Power supply ECU 26 and first DC relay 23A are electrically connected via first communication line 23C. A second communication line 23D that communicates with the power supply ECU 26 is connected to the second DC relay 23B. Power supply ECU 26 and second DC relay 23B are electrically connected via second communication line 23D. Hereinafter, the first communication line 23C and the second communication line 23D may be collectively referred to as communication lines 23C and 23D, as appropriate.

Further, a first monitoring line 23E is provided for monitoring whether or not a leakage occurs in the third positive electrode line 21C. One end of the first monitoring line 23E is electrically connected to the third positive electrode line 21C. The other end of the first monitoring line 23E is electrically connected to the power supply ECU 26. The power supply ECU 26 monitors whether a leakage occurs in the third positive electrode line 21C via the first monitoring line 23E.

A second monitoring line 23F is provided on the third negative electrode line 22C to monitor whether a leakage occurs in the third negative electrode line 22C. One end of the second monitoring line 23F is electrically connected to the third negative electrode line 22C. The other end of the second monitoring line 23F is electrically connected to the power supply ECU 26. The power supply ECU 26 monitors whether a leakage occurs in the third negative electrode line 22C via the second monitoring line 23F. Hereinafter, the first monitoring line 23E and the second monitoring line 23F may be collectively referred to as monitoring lines 23E and 23F, as appropriate. Note that the monitoring lines 23E and 23F correspond to the first conductive member.

The tip of the fourth positive electrode line 21D and the tip of the fourth negative electrode line 22D are provided in the PCU connector 28F. Thereby, the first on-vehicle load 30 and the DCDC converter 24 are electrically connected to the PCU 50. When the SMR 12 is in the on state, the assembled battery 11 and the PCU 50 are electrically connected. Note that the fourth positive line 21D and the fourth negative line 22D are also power lines that supply power to drive the MG 51. Hereinafter, the fourth positive electrode line 21D may be referred to as a first drive line 21D. The fourth negative electrode line 22D may be referred to as a second drive line 22D. The first drive line 21D and the second drive line 22 may be collectively referred to as drive lines 21D and 22D. Note that the drive lines 21D and 22D correspond to the second conductive member.

<Operation of power supply system>
A DC power supply 70 and an AC power supply 80 are connected to the power supply unit 20 from the outside. If the DC power source 70 or the AC power source 80 is, for example, a charger connected to a charging station, the power supply ECU 26 communicates with a CPU included in the charging station. In the present embodiment, a case in which power is supplied to the power supply unit 20 from the DC power supply 70, which is a charger, will be described below.

During normal times, such as when the vehicle is parked or parked or during normal driving, the battery ECU 14 turns on the SMR 12. Further, the battery ECU 14 turns off the power relay 13. The power supply ECU 26 turns off the DC relays 23A and 23B. Thereby, the power source of the assembled battery 11 is supplied to the first on-vehicle load 30, the DCDC converter 24, and the PCU 50. Conversely, the regenerated power of the MG 510 is supplied to the first on-vehicle load 30, the DCDC converter 24, and the assembled battery 11. At this time, the drive lines 21D and 22D are in an energized state. Monitoring lines 23E and 23F are in a de-energized state.

On the other hand, during DC charging when the DC power source 70 is connected to the power supply unit 20 while the vehicle is parked or stopped, the battery ECU 14 turns on the SMR 12. The battery ECU 14 turns off the power relay 13. The power supply ECU 26 turns on the DC relays 23A and 23B. Thereby, the DC power supplied from the DC power supply 70 is supplied to the assembled battery 11, the first on-vehicle load 30, and the DCDC converter 24. At this time, the monitoring lines 23E and 23F are in a energized state. Drive lines 21D and 22D are in a non-energized state.

The reason why the drive lines 21D and 22D are in a non-energized state during DC charging is because the PCU 50 is in an OFF state during DC charging. As described above, the power supply ECU 26 communicates with the vehicle ECU 52 and the battery ECU 14 via wiring (not shown). The on-board ECU 52 includes a mask circuit 52A that turns off the PCU 50. During DC charging, the power supply ECU 26 outputs an operation signal to the on-vehicle ECU 52 to operate the mask circuit 52A.

The on-vehicle ECU 52 operates the mask circuit 52A based on the operation signal. When the mask circuit 52A operates, the PCU 50 is turned off. The PCU 50 is turned off by the mask circuit 52A. Accordingly, no potential difference occurs between the DC power supply 70 and the PCU 50. As a result, during DC charging, the drive lines 21D and 22D are in a non-energized state.

Note that in FIG. 2, the energization timing is simply shown. When power is supplied to the power supply unit 20 from the DC power supply 70, the power supply ECU 26 outputs an on signal to the DC relays 23A, 23B to turn on the DC relays 23A, 23B, for example. At the same time, the power supply ECU 26 outputs an operation signal to the mask circuit 52A to operate the mask circuit 52A. According to this, power is supplied to the power supply unit 20 from the DC power supply 70 from the outside. In this case, the monitoring lines 23E and 23F are energized. Drive lines 21D and 22D are in a non-energized state. Note that the on signal and the operation signal correspond to switching signals. The DC relays 23A, 23B and the mask circuit 52A correspond to a switching device.

When the DC power supply 70 is removed from the power supply unit 20, the power supply ECU 26 does not output ON signals to the DC relays 23A and 23B. At the same time, the power supply ECU 26 does not output the operation signal to the mask circuit 52A. When the DC power supply 70 is removed from the power supply unit 20, the monitoring lines 23E and 23F are de-energized. The drive lines 21D and 22D are energized.

A method of controlling the energization timing of the monitoring lines 23E, 23F and the drive lines 21D, 22D will be described below based on the functions provided by the power supply ECU 26. The power supply ECU 26 includes a processing device such as a CPU, a memory device such as a ROM and a RAM, and the like. The power supply ECU 26 performs various controls by the CPU executing programs stored in the ROM. Functionally, the CPU includes a determination section 26A and a signal output section 26B. Functions are also referred to as functional blocks. It can be said that the program includes the functions of the determination section 26A and the signal output section 26B. In the drawings, the determination unit 26A is abbreviated as "JDP". The signal output section 26B is abbreviated as "STP".

Note that the means and/or functions provided by the power supply ECU 26 can be provided by software recorded in a tangible memory device and a computer that executes it, only software, only hardware, or a combination thereof. For example, if the power supply ECU 26 is provided by an electronic circuit that is hardware, it may be provided by a digital circuit including multiple logic circuits, or by an analog circuit.

The power supply ECU 26 has a switching control flow that controls switching of the energization timing of the monitoring lines 23E, 23F and the drive lines 21D, 22D. The power supply ECU 26 repeatedly performs the switching control flow at predetermined time intervals. The power supply ECU 26 always repeats the switching control flow at predetermined time intervals.

In the switching control flow shown in FIG. 3, in step S110, the determining unit 26A determines whether or not the monitoring lines 23E and 23F are energized. In step S110, the determination unit 26A communicates with the CPU included in the DC power supply 70. As a result of the communication, it is determined whether or not it is connected to the DC power supply 70. Based on this, the determining unit 26A determines whether or not the monitoring lines 23E and 23F are energized. If the determining unit 26A determines in step S110 that the monitoring lines 23E and 23F are energized, the process advances to step S121.

In step S121, the signal output section 26B outputs an on signal to the DC relays 23A and 23B. Next, in step S122, an operation signal is output to the mask circuit 52A. Then proceed to the end. In this case, the monitoring lines 23E and 23F are energized. Drive lines 21D and 22D are in a non-energized state. Note that the on signal and the operation signal may be output at the same time. The on signal and the operation signal may be output in sequence.

In step S110, if the determining unit 26A determines that the monitoring lines 23E and 23F are not energized, the process advances to step S131. In step S131, the signal output unit 26B does not output the ON signal to the DC relays 23A and 23B. Next, in step S132, the operation signal is not output to the mask circuit 52A. Then proceed to the end. In this case, the monitoring lines 23E and 23F are in a non-energized state. Drive lines 21D and 22D are in an energized state. Note that the non-output of the on signal and the non-output of the operation signal may be performed simultaneously. The non-output of the on signal and the non-output of the operation signal may be performed in sequence.

Next, based on the timing chart shown in FIG. 4, the switching timing of energization of the monitoring lines 23E, 23F and the drive lines 21D, 22D will be explained. In the timing chart, from time t1 to time t2, the vehicle is in a parked or stopped state or a running state. From time t2 to time t3, the vehicle is in a parked and stopped state and is also in a charging state. At time t2, the DC power supply 70 is connected to the DC connector 28E. Between time t1 and time t2, the power supply ECU 26 executes step S131 and step S132. At time t2, when the monitoring lines 23E, 23F and the drive lines 21D, 22D are energized, the power supply ECU 26 executes step S121 and step S122 from time t2 to time t3. According to this, the monitoring lines 23E, 23F and the drive lines 21D, 22D are not energized at the same time. The timing of energization of the monitoring lines 23E and 23F is different from the timing of energization of the drive lines 21D and 22D.

<Mechanical configuration of power supply unit>
In describing the components included in the power supply unit 20, the thickness direction of the substrate 27, which will be described later, may be referred to as a TD (thickness direction) direction. The two depth directions orthogonal to the thickness direction of the substrate 27 are sometimes referred to as a DP (depth direction) direction, and the width direction is sometimes referred to as a WD (width direction) direction. The DP direction and the WD direction correspond to the direction in which the front surface 27A and the back surface 27B of the substrate 27 extend. The DP direction corresponds to the first orthogonal direction. The WD direction corresponds to the second orthogonal direction.

The power supply unit 20 includes a substrate 27, an electromagnetic shield 29, a housing 60, and a terminal block 90 in addition to the components described above. The board 27 includes a power supply ECU 26 and electrical wiring electrically connected to the power supply ECU 26. The substrate 27 has a flat shape with a thin thickness in the TD direction. The substrate 27 includes a front surface 27A and a back surface 27B, which are spaced apart by a thickness in the TD direction. A power supply ECU 26 and electrical wiring are provided on the surface 27A. The electromagnetic shield 29 is a shield member for suppressing noise from entering electrical components. In this embodiment, it is provided on the back surface 27B side of the substrate 27. Note that the manner in which various components are housed in the housing 60 will be explained later.

The housing 60 is a case for housing the battery pack 10 and the components included in the power supply unit 20. The housing 60 is mainly composed of metal such as aluminum. As shown in FIG. 5, the housing 60 includes an annular side wall 62 that opens in the TD direction. The battery pack 10 and the components included in the power supply unit 20 are housed in a space surrounded by the side wall 62.

The side wall 62 includes a first wall 62A and a third wall 62C that are spaced apart in the WD direction, and a second wall 62B and a fourth wall 62D that are spaced apart in the DP direction. The first wall portion 62A to the fourth wall portion 62D are continuous in the clockwise direction, with the first wall portion 62A, the second wall portion 62B, the third wall portion 62C, and the fourth wall portion 62D continuing.

Further, the side wall 62 is provided with a partition wall 63 that divides the space in the TD direction. The partition wall 63 is continuous with the side wall 62 by the same member. The partition wall 63 divides the space inside the housing 60 into a first space and a second space. A power supply unit 20 is housed in the first space. The battery pack 10 is housed in the second space. Note that the plan view perpendicular to the WD direction shows the configuration when the power supply unit 20 is viewed from the first space side. In the plan view, illustrations of the DCDC converter 24, the ACDC converter 25, and the conductive members and connectors connected thereto are omitted.

A DC connector 28E is provided on the first wall portion 62A. A first power connector 28A and a PCU connector 28F are provided on the third wall portion 62C. The DC connector 28E is provided on the fourth wall 62D side of the first wall 62A. The first power connector 28A is provided on the fourth wall 62D side of the third wall 62C. The DC connector 28E and the first power connector 28A are provided on the side wall 62 so as to face each other in the WD direction. A PCU connector 28F is provided on the second wall portion 62B side of the third wall portion 62C. In the third wall portion 62C, the PCU connector 28F is provided closer to the second wall portion 62B than the first power connector 28A.

A third positive electrode line 21C and a third negative electrode line 22C extend from the DC connector 28E toward the first power connector 28A. The ends of the third positive electrode line 21C and the third negative electrode line 22C on the DC connector 28E side are connected to the DC connector 28E. A first power line 20A and a second power line 20B extend from the first power connector 28A toward the DC connector 28E. Ends of the first power line 20A and the second power line 20B on the first power connector 28A side are connected to the first power connector 28A.

A first DC relay 23A is provided between the end of the third positive electrode line 21C on the first power connector 28A side and the end of the first power line 20A on the DC connector 28E side. A second DC relay 23B is provided between the end of the third negative electrode line 22C on the first power connector 28A side and the end of the second power line 20B on the DC connector 28E side.

Further, the first power line 20A extends toward the second wall portion 62B on the way from the first power connector 28A toward the DC connector 28E. The second power line 20B extends from the first power connector 28A toward the DC connector 28E, and extends toward the second wall portion 62B. Hereinafter, in order to simplify the explanation, the tip of the portion of the first power line 20A that extends toward the second wall portion 62B will be referred to as a first tip. The tip of the portion of the second power line 20B that extends toward the second wall portion 62B is referred to as a second tip.

As described above, the PCU connector 28F is provided on the second wall portion 62B side of the third wall portion 62C. A fourth positive electrode line 21D extends from the PCU connector 28F toward the first tip. The fourth positive electrode line 21D extends along the WD direction. It can also be said that the fourth positive electrode line 21D extends from the third wall 62C toward the first wall 62A. The end of the fourth positive electrode line 21D on the first tip side is connected to the first tip. An end of the fourth positive electrode line 21D on the PCU connector 28F side is connected to the PCU connector 28F.

A fourth negative electrode line 22D extends from the PCU connector 28F toward the second tip. The fourth negative electrode line 22D extends along the WD direction. It can also be said that the fourth negative electrode line 22D extends from the third wall 62C toward the first wall 62A. The end of the fourth negative electrode line 22D on the second tip side is connected to the second tip. An end of the fourth negative electrode line 22D on the PCU connector 28F side is connected to the PCU connector 28F.

The PCU connector 28F, the fourth positive electrode line 21D, and the fourth negative electrode line 22D are provided on the terminal block 90. The terminal block 90 is supported by the housing 60. The terminal block 90 supports the fourth positive electrode line 21D and the fourth negative electrode line 22D, and also supports the PCU connector 28F. The terminal block 90 is mainly composed of resin or the like.

As shown in FIG. 6, the terminal block 90 includes a support portion 91, a first support wall portion 92, and a second support wall portion 93. A first support wall portion 92 and a second support wall portion 93 are provided on the upper surface 91A of the support portion 91. The first support wall part 92 and the second support wall part 93 are provided so as to face each other at a predetermined distance apart in the DP direction. A fourth positive electrode line 21D and a fourth negative electrode line 22D are provided between the first support wall portion 92 and the second support wall portion 93 in the terminal block 90.

Further, a substrate 27 is provided in a space closer to the second wall portion 62B than the third positive electrode line 21C and the third negative electrode line 22C in the first space. As described above, the electromagnetic shield 29 is provided on the back surface 27B side of the substrate 27. The electromagnetic shield 29 is a shield member for suppressing noise from entering the drive lines 21D, 22D and the monitoring lines 23E, 23F from the outside.

The electromagnetic shield 29 has a shape that follows the substrate 27. In plan view, the electromagnetic shield 29 is one size larger than the substrate 27. The electromagnetic shield 29 and the substrate 27 overlap in the WD direction. The electromagnetic shield 29 overlaps with a portion of the terminal block 90, a portion of the drive lines 21D and 22D, and a portion of the monitoring lines 23E and 23F in the WD direction.

Further, a communication plug 27C connected to the power supply ECU 26 is provided on the surface 27A of the board 27. A first communication line 23C extends from the communication plug 27C toward the first DC relay 23A. A second communication line 23D extends from the communication plug 27C toward the second DC relay 23B. Communication plug 27C and DC relays 23A and 23B are connected via communication lines 23C and 23D.

A monitoring plug 27D connected to the power supply ECU 26 is provided on the surface 27A of the board 27. A first monitoring line 23E extends from the monitoring plug 27D toward the third positive electrode line 21C. A second monitoring line 23F extends from the monitoring plug 27D toward the third negative electrode line 22C. The monitoring plug 27D, the third positive electrode line 21C, and the third negative electrode line 22C are connected via monitoring lines 23E and 23F.

The monitoring lines 23E and 23F extend from the monitoring plug 27D toward the third wall portion 62C, and then toward the fourth wall portion 62D. The monitoring lines 23E and 23F cross the electromagnetic shield 29 while extending toward the fourth wall 62D. Regarding the WD direction, the monitoring lines 23E and 23F are provided closer to the partition wall 63 than the electromagnetic shield 29. The monitoring lines 23E and 23F overlap the electromagnetic shield 29 in the WD direction.

Furthermore, the portions of the monitoring lines 23E and 23F that overlap with the electromagnetic shield 29 in the WD direction overlap with the drive lines 21D and 22D and the terminal block 90 on the partition wall 63 side. A support portion 91, drive lines 21D and 22D, monitoring lines 23E and 23F, and electromagnetic shield 29 are provided in the order of overlapping from the partition wall 63 toward the substrate 27. Note that the direction in which the drive lines 21D and 22D extend differs from the direction in which the monitoring lines 23E and 23F extend by 90 degrees. In plan view, the drive lines 21D, 22D and the monitoring lines 23E, 23F are orthogonal to each other.

Drive lines 21D, 22D and monitoring lines 23E, 23F are provided between the support portion 91 and the electromagnetic shield 29 in the TD direction. Drive lines 21D and 22D and monitoring lines 23E and 23F are provided between the first support wall portion 92 and the second support wall portion 93. For example, cutouts are provided in the first support wall portion 92 and the second support wall portion 93 to allow the monitoring lines 23E and 23F to pass therethrough. Monitoring lines 23E and 23F are passed through the notches. Drive lines 21D and 22D and monitoring lines 23E and 23F are provided in a space formed by the support part 91, the first support wall part 92, the second support wall part 93, and the electromagnetic shield 29. Note that the support portion 91 corresponds to the first partition. The electromagnetic shield 29 corresponds to the second partition.

Note that the monitoring lines 23E and 23F extend from the second wall 62B toward the fourth wall 62D, and then from the third wall 62C toward the first wall 62A. Thereafter, the monitoring lines 23E and 23F extend toward the third positive electrode line 21C and the third negative electrode line 22C. The first monitoring line 23E is connected to the third positive electrode line 21C via a conductive connecting member or the like. The second monitoring line 23F is connected to the third negative electrode line 22C via a conductive connecting member or the like.

<Effect>
As described above, the monitoring lines 23E, 23F and the drive lines 21D, 22D are provided between the support portion 91 and the electromagnetic shield 29. The monitoring lines 23E and 23F are lines connected to the power supply ECU 26 as electrical components. The drive lines 21D and 22D are lines connected to the PCU 50 as electrical components. The monitoring lines 23E, 23F and the drive lines 21D, 22D have different energization timings.

Since the energization timing of the monitoring lines 23E, 23F and the energization timing of the drive lines 21D, 22D are different, it is possible to suppress noise generated due to energization of the drive lines 21D, 22D from entering the power supply ECU 26. Accordingly, there is no need to provide a member between the monitoring lines 23E, 23F and the drive lines 21D, 22D to shield noise propagating between the lines. Between the electromagnetic shield 29 and the support part 91, the degree of freedom in arranging the monitoring lines 23E, 23F and the drive lines 21D, 22D is improved.

As explained above, the monitoring lines 23E and 23F are electrically connected to the power supply ECU 26. Drive lines 21D and 22D are electrically connected to a PCU 50 that is connected to the MG 51. The timing of energization of the monitoring lines 23E and 23F is different from the timing of energization of the drive lines 21D and 22D. When the drive lines 21D, 22D are energized, noise is suppressed from entering the power supply ECU 26 connected from the drive lines 21D, 22D to the monitoring lines 23E, 23F. Problems occurring in the power supply ECU 26 are suppressed.

As described above, the power supply ECU 26 outputs an on signal to the DC relays 23A and 23B, and also outputs an operation signal to the mask circuit 52A. This makes the monitoring lines 23E and 23F energized. The drive lines 21D and 22D are de-energized. Further, the power supply ECU 26 does not output ON signals to the DC relays 23A and 23B, and also does not output an operation signal to the mask circuit 52A. This causes the monitoring lines 23E and 23F to be de-energized. The drive lines 21D and 22D are energized. Monitoring lines 23E, 23F and drive lines 21D, 22D are prevented from being energized at the same time.

As described above, the power supply ECU 26 includes a determination section 26A and a signal output section 26B. The determining unit 26A determines whether or not the monitoring lines 23E and 23F are energized. The determination unit 26A communicates with the CPU included in the DC power supply 70. As a result of the communication, it is determined whether or not it is connected to the DC power supply 70. Based on this, the determining unit 26A determines whether or not the monitoring lines 23E and 23F are energized.

When the determining unit 26A determines that the monitoring lines 23E and 23F are energized, the signal output unit 26B outputs an ON signal to the DC relays 23A and 23B and outputs an operation signal to the mask circuit 52A. According to this, the monitoring lines 23E and 23F are in a energized state, and the drive lines 21D and 22D are in a non-energized state. When the determining section 26A determines that the monitoring lines 23E and 23F are not energized, the signal output section 26B disables the on-signal to the DC relays 23A and 23B, and also disables the output of the operation signal to the mask circuit 52A. do. According to this, the monitoring lines 23E and 23F are in a non-energized state, and the drive lines 21D and 22D are in a energized state.

(Second embodiment)
In the second embodiment, as shown in FIG. 7, the power supply unit 20 includes a first changeover switch 21E and a second changeover switch 22E that control power supply to the PCU 50. A first changeover switch 21E is provided on the first drive line 21D. A second changeover switch 22E is provided on the second drive line 22D. In the second embodiment, the mask circuit 52A is not mounted on the vehicle ECU 52. Note that the mask circuit 52A may be mounted on the on-vehicle ECU 52. Note that the DC relays 23A, 23B and the changeover switches 21E, 22E correspond to a changeover device.

When power is supplied from the outside to the power supply unit 20 from the DC power supply 70, the power supply ECU 26 sends an on signal to the DC relays 23A, 23B to turn on the DC relays 23A, 23B, as shown in FIG. Output. At the same time, the power supply ECU 26 does not output the ON signal to the changeover switches 21E, 22E, and turns the changeover switches 21E, 22E into the OFF state. According to this, the monitoring lines 23E and 23F become energized. Drive lines 21D and 22D are de-energized.

When the DC power supply 70 is removed from the power supply unit 20, the power supply ECU 26 does not output the ON signal to the DC relays 23A, 23B, and turns the DC relays 23A, 23B into the OFF state. At the same time, the power supply ECU 26 outputs an on signal to the changeover switches 21E, 22E to turn on the changeover switches 21E, 22E. According to this, the monitoring lines 23E and 23F become de-energized. The drive lines 21D and 22D become energized.

(Third embodiment)
In the third embodiment, as shown in FIG. 9, the power supply unit 20 is provided with a related signal generating device 20E. The related signal generator 20E is associated with the energization state of one of the monitoring lines 23E, 23F and the drive lines 21D, 22D. The related signal generator 20E outputs the related signal to the power supply ECU 26 when one of these lines is energized. Power supply ECU 26 de-energizes the other of these lines based on the received relevant signals.

Examples of the related signal generating device 20E include a related signal generating section, a time-operated timer, a temperature sensor, and the like. Note that the related signal generating device 20E may or may not be included in the power supply ECU 26. In addition, in the drawings, the related signal generating device 20E is abbreviated as "RSG".

As an example, the related signal generation unit in the third embodiment determines whether the monitoring lines 23E, 23F are energized, and generates a related signal when it is determined that the monitoring lines 23E, 23F are energized, It has a function of outputting related signals to the signal output section 26B. The signal output unit 26B de-energizes the drive lines 21D and 22D based on the received related signal. This prevents the monitoring lines 23E, 23F and the drive lines 21D, 22D from being energized at the same time. Note that when the related signal generating section determines that the monitoring lines 23E and 23F are not energized, the opposite control is performed.

The related signal generation section also has a function of determining whether or not the drive lines 21D and 22D are energized, and outputting a related signal to the signal output section 26B when it is determined that the drive lines 21D and 22D are energized. may be provided. In that case, the signal output unit 26B de-energizes the monitoring lines 23E and 23F based on the received related signal. This prevents the monitoring lines 23E, 23F and the drive lines 21D, 22D from being energized at the same time. Note that when the related signal generating section determines that the drive lines 21D and 22D are not energized, the opposite control is performed.

For example, the temperature sensor determines whether the temperature of one of the monitoring lines 23E, 23F and the drive lines 21D, 22D is higher than a preset threshold. Then, when it is determined that it is equal to or greater than the threshold value, a related signal is output to the signal output section 26B. The signal output unit 26B then de-energizes the other of the monitoring lines 23E, 23F and the drive lines 21D, 22D based on the received related signal. This prevents the monitoring lines 23E, 23F and the drive lines 21D, 22D from being energized at the same time. Note that the temperature sensor may be provided in the DC relays 23A and 23B. The temperature sensor may be provided in the monitoring lines 23E, 23F or the drive lines 21D, 22D.

In the time-operated timer, for example, it is determined whether one of the monitoring lines 23E, 23F and the drive lines 21D, 22D is energized for a preset predetermined time or longer. Then, when it is determined that the power has been on for a predetermined time or longer, a related signal is output to the signal output section 26B. The signal output unit 26B then de-energizes the other of the monitoring lines 23E, 23F and the drive lines 21D, 22D based on the received related signal. This prevents the monitoring lines 23E, 23F and the drive lines 21D, 22D from being energized at the same time. Note that the time-operated timer may be provided in the DC relays 23A and 23B. Time-operated timers may be provided in the monitoring lines 23E, 23F or in the drive lines 21D, 22D.

(Fourth embodiment)
In the fourth embodiment, as shown in FIG. 10, the electromagnetic shield 29 is provided closer to the support portion 91 than the ends of the support walls 92 and 93 in the TD direction. Furthermore, an electromagnetic shield 29 is provided between the first support wall part 92 and the second support wall part 93 in the DP direction. Monitoring lines 23E, 23F and drive lines 21D, 22D are provided between the electromagnetic shield 29 and the terminal block 90. This also produces the same effect. Furthermore, it is possible to suppress an increase in body size in the TD direction. The degree of freedom in layout of the parts constituting the power supply unit 20 is improved. Note that the same holds true even if the terminal block 90 is replaced with a metal housing 60 or the like. In that case, the housing 60 includes a bottom wall 61 and a side wall 62. A side wall 62 is continuously provided on the surface of the bottom portion 61 and made of the same material. The electromagnetic shield 29 is provided closer to the bottom wall 61 than the end of the side wall 62 in the TD direction. Further, an electromagnetic shield 29 is provided between the two side walls 62 in the DP direction. Monitoring lines 23E, 23F and drive lines 21D, 22D are provided between the electromagnetic shield 29 and the housing 60. This also produces the same effect. In the drawings, a configuration to which the terminal block 90 is applied is shown as a representative.

(Fifth embodiment)
In the fifth embodiment, as shown in FIG. 11, another support stand 94 is provided in the space between the support section 91 and the support wall sections 92 and 93. The support base 94 has an opening in the TD direction, and an electromagnetic shield 29 is provided to close the opening. Monitoring lines 23E, 23F and drive lines 21D, 22D are provided in the space between the support base 94 and the electromagnetic shield 29. This also produces the same effect. In addition, from the fourth embodiment, it is possible to suppress an increase in body size. The degree of freedom in layout of the parts constituting the power supply unit 20 is improved. Note that similar to the fourth embodiment, the same holds true even if the terminal block 90 is replaced with the housing 60 or the like. In the drawings, a configuration to which the terminal block 90 is applied is shown as a representative.

Although the present disclosure has been described based on the embodiments, it is understood that the present disclosure is not limited to the embodiments or structures. The present disclosure also includes various modifications and equivalent modifications. In addition, while various combinations and configurations are shown in this disclosure, other combinations and configurations involving only one, more, or fewer elements are also within the scope and spirit of this disclosure. It is something that can be entered.

(Disclosure of technical ideas)
This specification discloses multiple technical ideas described in multiple sections listed below. Some sections may be written in a multiple dependent form, in which subsequent sections alternatively cite preceding sections. Some terms may be written in a multiple dependent form referring to another multiple dependent form. The terms written in these multiple dependent forms define multiple technical ideas.

(Technical thought 1)
electrical parts (26);
a first conductive member (23E, 23F) connected to the electrical component;
a second conductive member (21D, 22D) whose energization timing is different from that of the first conductive member;
a first partition wall (91) and a second partition wall (29) provided apart from each other with respect to the direction in which the first conductive member and the second conductive member are lined up;
A power supply unit, wherein the first conductive member and the second conductive member are provided between the first partition wall and the second partition wall.

(Technical thought 2)
The power supply unit according to technical idea 1, wherein the electric component controls switching between an energized state and a non-energized state of the first conductive member and the second conductive member.

(Technical thought 3)
The electrical component switches the first electrically conductive member and the second electrically conductive member between a energized state and a non-energized state by outputting and not outputting a switching signal to a switching device (21E, 22E, 23A, 23B, 52A). The controlling power supply unit according to technical idea 2.

(Technical thought 4)
The electrical component outputs or does not output the switching signal when detecting an energized state of one of the first conductive member and the second conductive member, or outputs or non-outputs the switching signal. The power supply unit according to technical idea 3, which outputs or does not output the switching signal when receiving a signal related to the energization state of one of the conductive members.

(Technical Thought 5)
The electric component includes a determination unit (26A) that determines whether the first conductive member is in an energized state;
The power supply unit according to technical concept 3 or 4, further comprising a signal output section (26B) that controls output and non-output of the switching signal based on the judgment of the judgment section.

(Technical Thought 6)
Further comprising a related signal generating device (20E) that generates a related signal associated with the energization state of the first conductive member,
The electric power according to technical concept 3 or 4, wherein the electrical component includes a signal output unit (26B) that acquires the related signal and controls output and non-output of the switching signal based on the acquired related signal. supply unit.

(Technical Thought 7)
It is installed in rechargeable vehicles,
During charging, the first electrically conductive member is in a energized state and the second electrically conductive member is in a non-energized state,
The power supply unit according to any one of technical ideas 1 to 6, wherein the first conductive member is in a non-energized state and the second conductive member is in an energized state during traveling.

(Technical Thought 8)
The first partition wall is a part of a terminal block (90),
The power supply unit according to any one of technical ideas 1 to 7, wherein the second partition is an electromagnetic shield.

(Technical Thought 9)
electrical parts (26);
a first conductive member (23E, 23F) connected to the electrical component;
a second conductive member (21D, 22D) whose energization timing is different from that of the first conductive member;
a power supply unit (20) having a first partition wall (91) and a second partition wall (29) that are provided apart from each other with respect to the direction in which the first conductive member and the second conductive member are lined up;
A switching device (21E, 22E, 23A, 23B, 52A) that switches the first conductive member and the second conductive member between an energized state and a non-energized state,
A power supply system, wherein the first conductive member and the second conductive member are provided between the first partition wall and the second partition wall.

(Technical Thought 10)
In addition to the electrical component, the first conductive member is connected to a charger (70) that can communicate with the electrical component,
The power supply system according to technical idea 9, wherein the electric component determines whether the first conductive member is energized based on communication with the charger.

Claims (10)

1. electrical parts (26);
   a first conductive member (23E, 23F) connected to the electrical component;
   a second conductive member (21D, 22D) whose energization timing is different from that of the first conductive member;
   A first partition wall (91) and a second partition wall (29) provided apart from each other with respect to the direction in which the first conductive member and the second conductive member are lined up,
   A power supply unit, wherein the first conductive member and the second conductive member are provided between the first partition wall and the second partition wall.
2. The power supply unit according to claim 1, wherein the electric component controls switching between an energized state and a non-energized state of the first conductive member and the second conductive member.
3. The electrical component switches the first conductive member and the second conductive member between a energized state and a non-energized state by outputting and not outputting a switching signal to a switching device (21E, 22E, 23A, 23B, 52A). The power supply unit according to claim 2, which is controlling the power supply unit.
4. The electrical component outputs or does not output the switching signal when detecting an energized state of one of the first conductive member and the second conductive member, or outputs or non-outputs the switching signal. The power supply unit according to claim 3, wherein the switching signal is output or not output when a signal related to the energization state of one of the conductive members is received.
5. The electric component includes a determination unit (26A) that determines whether the first conductive member is in an energized state;
   The power supply unit according to claim 3 or 4, further comprising a signal output section (26B) that controls output and non-output of the switching signal based on the judgment of the judgment section.
6. Further comprising a related signal generating device (20E) that generates a related signal associated with the energization state of the first conductive member,
   The power supply according to claim 3 or 4, wherein the electric component includes a signal output unit (26B) that acquires the related signal and controls output and non-output of the switching signal based on the acquired related signal. unit.
7. It is installed in rechargeable vehicles,
   During charging, the first electrically conductive member is in a energized state and the second electrically conductive member is in a non-energized state,
   The power supply unit according to any one of claims 1 to 4, wherein the first conductive member is in a non-energized state and the second conductive member is in an energized state during traveling.
8. The first partition wall is a part of a terminal block (90),
   The power supply unit according to claim 1, wherein the second partition wall is an electromagnetic shield.
9. electrical parts (26);
   a first conductive member (23E, 23F) connected to the electrical component;
   a second conductive member (21D, 22D) whose energization timing is different from that of the first conductive member;
   a power supply unit (20) having a first partition wall (91) and a second partition wall (29) that are provided apart from each other with respect to the direction in which the first conductive member and the second conductive member are lined up;
   A switching device (21E, 22E, 23A, 23B, 52A) that switches the first conductive member and the second conductive member between an energized state and a non-energized state,
   A power supply system, wherein the first conductive member and the second conductive member are provided between the first partition wall and the second partition wall.
10. In addition to the electrical component, the first conductive member is connected to a charger (70) that can communicate with the electrical component,
    The power supply system according to claim 9, wherein the electric component determines whether the first conductive member is energized based on communication with the charger.

Images