Vehicle control device

Abstract

This invention relates to a vehicle control device. The power distribution ECU (100) is a vehicle control device used in a vehicle to control the distribution of power supplied from multiple power supply units (110) to multiple load units (120). The power distribution ECU (100) includes multiple power terminals (10), multiple load terminals (20), a first power line section (31), a second power line section (32), and a trunk line disconnection circuit (70). The power terminals (10) are electrically connected to the power supply units (110). The load terminals (20) are electrically connected to the load units (120). The first power line section (31) is electrically connected to the first power terminal (11). The second power line section (32) is electrically connected to the second power terminal (12). The trunk line disconnection circuit (70) disconnects the electrical connection between the first power line section (31) and the second power line section (32) based on an abnormality in at least one of the current value and voltage value.

Description

[0001] Cross-references to related applications

[0002] This application is based on Japanese Patent Application No. 2023-186044, filed in Japan on October 31, 2023, and incorporates the contents of the base application in its entirety by reference. Technical Field

[0003] This specification relates to a control device for a vehicle. Background Technology

[0004] Patent Document 1 discloses a power supply device that supplies power from multiple power sources to a load unit as a control device for a vehicle. This power supply device includes a switching unit that cuts off the power supplied from the power sources based on the detection result of the current detected by a current detection unit.

[0005] Patent Document 1: Japanese Patent Application Publication No. 2020-120479

[0006] In recent years, there has been a demand for the ability to distribute power to multiple loads. However, the power supply device in Patent Document 1 does not have this capability. Therefore, it is natural that in the event of an anomaly in the circuitry related to the power supply device, the structure of Patent Document 1 cannot adequately supply power to the loads. Summary of the Invention

[0007] The purpose of this disclosure is to provide a control device for a vehicle that can provide appropriate power supply to the load even in the event of an anomaly.

[0008] To achieve the above objectives, one disclosed embodiment is a vehicle control device used in a vehicle to control the distribution of power supplied from multiple power sources to multiple loads. The device includes: multiple power terminal sections electrically connected to the power sources; multiple load terminal sections electrically connected to the loads; a first power line section electrically connected to a first power terminal included in the multiple power terminal sections; a second power line section electrically connected to a second power terminal included in the multiple power terminal sections; and a trunk line disconnection circuit that electrically connects the first power line section and the second power line section, and disconnects the electrical connection between the first power line section and the second power line section based on an abnormality in at least one of the current value and voltage value.

[0009] In this method, based on an anomaly in at least one of the current or voltage values, the electrical connection between the first power supply section and the second power supply section is severed by the mains disconnect circuit, and the first power supply section and the second power supply section can be electrically isolated. Based on the above, even in the event of an anomaly in the circuit related to the vehicle control device, power can be appropriately supplied from multiple power supply sections to multiple load terminals, thereby appropriately supplying power to the load sections connected to each load terminal.

[0010] Furthermore, the reference numbers in parentheses in the claims are merely examples of the correspondence with specific structures in the embodiments described later, and do not impose any limitation on the scope of the technology. Additionally, combinations of claims not explicitly stated in the claims are also possible, provided that such combinations do not particularly hinder the process. Attached Figure Description

[0011] Figure 1 This is a circuit diagram illustrating the structure of a power distribution ECU according to one embodiment of the present disclosure.

[0012] Figure 2 It is a circuit diagram showing the structure of a power cut-off circuit.

[0013] Figure 3 It is a circuit diagram showing the structure of the trunk line disconnection circuit.

[0014] Figure 4 This is a circuit diagram showing the structure of a load disconnection circuit.

[0015] Figure 5 It is a flowchart showing the detailed process of the startup procedure performed by the power distribution ECU.

[0016] Figure 6 This is a diagram representing the power distribution ECU in abnormal scenario 1.

[0017] Figure 7 This is a diagram showing the power distribution ECU performing the cut-off process in operating mode 1.

[0018] Figure 8 This is a diagram showing the power distribution ECU performing the cut-off process in operating mode 1.

[0019] Figure 9 This is a flowchart showing the details of the cut-off process in working mode 1.

[0020] Figure 10 This is a diagram representing the power distribution ECU in abnormal scenario 2.

[0021] Figure 11 This is a diagram showing the power distribution ECU implementing the cut-off process in operating mode 2.

[0022] Figure 12 This is a flowchart showing the details of the cut-off process in working mode 2.

[0023] Figure 13 This is a diagram representing the power distribution ECU in abnormal scenario 3.

[0024] Figure 14 This is a diagram showing the power distribution ECU performing the cut-off process in operating mode 3.

[0025] Figure 15 This is a flowchart detailing the cutting process in working mode 3.

[0026] Figure 16 This is a diagram representing the power distribution ECU in abnormal scenario 4.

[0027] Figure 17 This is a diagram showing the power distribution ECU performing the disconnection process in operating mode 4.

[0028] Figure 18 This is a flowchart showing the details of the cut-off process in working mode 4.

[0029] Figure 19 This is a diagram representing the power distribution ECU in abnormal scenario 5.

[0030] Figure 20 This is a diagram showing the power distribution ECU implementing the cut-off process in operating mode 5.

[0031] Figure 21 This is a flowchart detailing the cutting process in working mode 5.

[0032] Figure 22 This is a diagram representing the power distribution ECU in abnormal scenario 6.

[0033] Figure 23 This is a diagram showing the power distribution ECU implementing the cut-off process in operating mode 6.

[0034] Figure 24 This is a flowchart showing the details of the cut-off process in working mode 6.

[0035] Figure 25 This is a diagram representing the power distribution ECU in abnormal scenario 7.

[0036] Figure 26 This is a diagram showing the power distribution ECU implementing the cut-off process in operating mode 7.

[0037] Figure 27 This is a flowchart showing the details of the cut-off process in working mode 7.

[0038] Figure 28 This is a diagram representing the power distribution ECU in abnormal scenario 8.

[0039] Figure 29 This is a diagram showing the power distribution ECU performing the cut-off process in operating mode 8.

[0040] Figure 30 This is a flowchart detailing the cutting process in working mode 8.

[0041] Figure 31 This is a circuit diagram showing the structure of the trunk line disconnection circuit in Modified Example 2.

[0042] Figure 32 This is a circuit diagram showing the structure of the load cut-off circuit in variation example 3. Detailed Implementation

[0043] Figure 1 The power distribution ECU (Electronic Control Unit) 100 shown in one embodiment of this disclosure is a vehicle control device used in a vehicle. The power distribution ECU 100 is mounted in the vehicle and connected to multiple power supply units 110 and multiple load units 120. The power distribution ECU 100 distributes power supplied from the multiple power supply units 110 to a large number of load units 120. The power distribution ECU 100 may also be a single control device that integrates the power distribution functions of the vehicle, or it may be a structure installed in a control device together with other functional units.

[0044] As an example, the power distribution ECU 100 is installed within a zone ECU. The zone ECU, along with the central ECU, on-board equipment, and communication lines, constitutes the on-board network system. Zone ECUs are configured in each of several pre-defined zones within the vehicle. One of these zone ECUs also functions as the power distribution ECU 100. The zone ECU has a gateway function, enabling communication between networks using different communication methods by converting and relaying data. The zone ECU controls the on-board equipment based on instructions from the central ECU. The zone ECU, with the functionality of the power distribution ECU 100, controls the distribution of power to other zone ECUs, as well as to the individual ECUs, actuators, and sensors that constitute the on-board equipment.

[0045] <Structure of power supply section and load section>

[0046] First, the details of the power supply unit 110 and the load unit 120 connected to the power distribution ECU 100 will be explained.

[0047] The power supply unit 110 is a power source installed in the vehicle. The power supply unit 110 supplies power to the power distribution ECU 100. The power supply unit 110 includes a main power supply 111 (…). Figure 1 Power supply A) and auxiliary power supply 112 ( Figure 1Power supply B). The main power supply 111 is a power supply unit 110 with a higher power supply capacity compared to the auxiliary power supply 112. As an example, the main power supply 111 is a DC-DC converter in the vehicle. The auxiliary power supply 112 is a power supply unit 110 with a lower power supply capacity compared to the main power supply 111. As an example, the auxiliary power supply 112 is installed in the vehicle's auxiliary battery. The power supply capacity of the main power supply 111 can be several times to about ten times that of the auxiliary power supply 112.

[0048] <Structure of the load section>

[0049] The load unit 120 includes the aforementioned area ECU, independent ECU, actuators, and sensors. The load unit 120 consumes power allocated by the power distribution ECU 100 to perform its designated functions. The load unit 120 includes a priority load 121 (…). Figure 1 Load C) and typical load 122 ( Figure 1 Loads A, B, D, and E). Priority load 121 is a load 120 that receives priority power supply compared to normal loads 122. As an example, loads 120 requiring redundancy are designated as priority loads 121. Specifically, vehicle-mounted equipment related to electric power steering and braking systems, as well as other regional ECUs, become priority loads 121 with high priority functions. Loads 120 other than these priority loads 121 are designated as normal loads 122. Normal loads 122 are loads 120 that do not require redundancy and are low-priority (non-priority) loads 120 with only low-priority functions.

[0050] <Structure of the Power Distribution ECU>

[0051] Next, the structure of the power distribution ECU 100 will be described. The power distribution ECU 100 has multiple power terminals 10, multiple load terminals 20, power supply wiring KH, and multiple disconnection circuits.

[0052] Power terminal 10 is electrically connected to power supply unit 110. Power terminal 10 is integrated with a connector exposed outside the housing of the control device. Power to power supply unit 110 is supplied to power terminal 10 via a wire harness or the like connected to the connector. Power terminal 10 includes a first power terminal 11 and a second power terminal 12. First power terminal 11 is electrically connected to main power supply 111. Power is supplied from main power supply 111 to first power terminal 11. Second power terminal 12 is electrically connected to auxiliary power supply 112. Power is supplied from auxiliary power supply 112 to second power terminal 12. Compared to second power terminal 12, more power is supplied to first power terminal 11. Therefore, first power terminal 11 is made larger than second power terminal 12 to handle the larger power.

[0053] Load terminal 20 is electrically connected to load section 120. Load terminal 20 is integrated with a connector exposed outside the housing of the control device. Load terminal 20 supplies power to load section 120 via a wire harness or the like connected to the connector. Load terminal 20 includes a first load terminal 21 and a second load terminal 22. First load terminal 21 is electrically connected to first power line section 31 via first load line section 51 and first interval 41 (described later). Second load terminal 22 is electrically connected to second power line section 32 via second load line section 52 and second interval 42 (described later).

[0054] The first load terminal 21 further includes a first priority terminal 21a and a first normal terminal 21b. The second load terminal 22 further includes a second priority terminal 22a and a second normal terminal 22b. The first priority terminal 21a and the second priority terminal 22a are electrically connected to the priority load 121. The first normal terminal 21b and the second normal terminal 22b are electrically connected to the normal load 122.

[0055] One of the first priority terminals 21a and one of the second priority terminals 22a are electrically connected to the same priority load 121. The first priority terminal 21a and the second priority terminal 22a connected to the same priority load 121 are adjacent to each other. Specifically, the first priority connector containing the first priority terminal 21a and the second priority connector containing the second priority terminal 22a are identical in shape. The first priority connector and the second priority connector are disposed adjacent to each other on the outside of the housing. The pin configurations inside the first priority connector and the second priority connector are identical. Furthermore, the first priority connector and the second priority connector can also be integrally formed. Through such integral formation of the connector, the first priority terminal 21a and the second priority terminal 22a also become adjacent to each other.

[0056] The power supply wiring KH is the wiring formed between multiple power terminals 10 and multiple load terminals 20. The power supply wiring KH is formed by a copper conductive layer (wiring pattern) disposed on the printed wiring board constituting the power distribution ECU 100. Busbars mounted along the wiring pattern on the printed wiring board may also form part of the power supply wiring KH. Busbars are connected in parallel with the wiring pattern at locations where current cannot be fully carried by the wiring pattern alone. The power supply wiring KH consists of power supply wiring 30, power mains 40, and load wiring 50, etc.

[0057] Power wiring 30 is wiring connected to power terminal 10. Power wiring 30 includes a first power line section 31 and a second power line section 32. The first power line section 31 is wiring section connected to the first power terminal 11. Power from the main power supply 111 is supplied to the first power line section 31. The wiring width (wiring cross-sectional area) of the first power line section 31 is wider (larger) than the wiring width of the second power line section 32, in order to handle the large power supplied from the main power supply 111. The second power line section 32 is wiring section connected to the second power terminal 12. Power from the auxiliary power supply 112 is supplied to the second power line section 32. Alternatively, a power type Zener diode may be arranged in the power wiring 30 in the interval between the power cut-off circuit 60 (described later) and the power terminal 10. The power type Zener diode is a structure used to prevent voltage breakdown of the power cut-off circuit 60 when a high voltage is output from the power supply section 110.

[0058] The power trunk line 40 is a wiring connection electrically connected to both the first power line section 31 and the second power line section 32. Power is supplied to the power trunk line 40 from both the main power supply 111 and the auxiliary power supply 112 via the first power line section 31 and the second power line section 32. The wiring width (wiring cross-sectional area) of the power trunk line 40 is the same as or wider than the wiring width of the first power line section 31. A trunk line disconnection circuit 70, described later, is provided in the middle of the power trunk line 40. The section between the first power line section 31 and the trunk line disconnection circuit 70 in the power trunk line 40 is designated as the first section 41. The first section 41 is the main section receiving power from the main power supply 111 when the trunk line disconnection circuit 70 is energized and disconnected (open). The section between the second power line section 32 and the trunk line disconnection circuit 70 in the power trunk line 40 is designated as the second section 42. The second section 42 is an auxiliary section that receives power from the auxiliary power supply 112 when the main line disconnection circuit 70 is energized and disconnected (open).

[0059] The load wiring 50 is the wiring connected to the load terminal 20. The wiring width (wiring cross-sectional area) of the load wiring 50 is narrower (smaller) compared to the wiring width of the power trunk 40. The wiring widths of each load wiring 50 may also be different from each other. The load wiring 50 includes a first load line portion 51 and a second load line portion 52. The first load line portion 51 electrically connects the first section 41 of the power trunk 40, which is closer to the first power line portion 31 than the trunk cut-off circuit 70, to the first load terminal 21. Among the plurality of first load line portions 51, the load wiring 50 that connects the first priority terminal 21a to the power trunk 40 is the first priority line portion 51a. Among the plurality of first load line portions 51, the load wiring 50 that connects the first normal terminal 21b to the power trunk 40 is the first normal line portion 51b. The second load line portion 52 electrically connects the second section 42 of the power trunk 40, which is closer to the second power line portion 32 than the trunk cut-off circuit 70, to the second load terminal 22. Among the plurality of second load line sections 52, the load wiring 50 that connects the second priority terminal 22a to the power supply trunk 40 is the second priority line section 52a. Among the plurality of second load line sections 52, the load wiring 50 that connects the second normal terminal 22b to the power supply trunk 40 is the second normal line section 52b.

[0060] The circuit breaker includes the electrical fuse EF (see reference). Figures 2-4 The power distribution ECU 100 is constructed by installing a large number of fuses EF on its printed wiring board. Through these fuses EF, power cut-off circuits such as the power cut-off circuit 60, mains cut-off circuit 70, and load cut-off circuit 80 are formed on the power supply wiring KH. When the cut-off circuit is in the ON state, the two wires connected to the cut-off circuit are electrically connected and energized. Conversely, when the cut-off circuit is in the OFF state, the two wires connected to the cut-off circuit are energized and disconnected.

[0061] Power cut-off circuit 60 (reference) Figure 2 The power disconnect circuit 60 is a disconnecting circuit installed on the power supply wiring 30. The power disconnecting circuit 60 disconnects the electrical connection between the power supply terminal 10 and the load terminal 20 (power trunk 40). Two power disconnecting circuits 60 are installed on the power supply wiring KH. The power disconnecting circuit 60 located on the first power line section 31 (…) Figure 1 The power cut-off circuit A) is the first power cut-off circuit 60a. The power cut-off circuit 60a is disposed in the second power line section 32. Figure 1 The cutting-off circuit B) is the second cutting-off circuit 60b. The first cutting-off circuit 60a cuts off the electrical connection between the first power terminal 11 and the first interval 41 based on an abnormality in at least one of the current value and voltage value in the first power line section 31. The second cutting-off circuit 60b cuts off the electrical connection between the second power terminal 12 and the second interval 42 based on an abnormality in at least one of the current value and voltage value in the second power line section 32.

[0062] Main line disconnection circuit 70 (reference) Figure 3 ) is a disconnect circuit located on the power supply main 40. Figure 1 (C) Shutdown Circuit 70. The trunk disconnection circuit 70 is equivalent to an isolator and a mains switch. The trunk disconnection circuit 70 is disposed in the middle of the power trunk 40, electrically connecting the first power line section 31 and the second power line section 32. Based on an abnormality in at least one of the current or voltage values ​​in the power trunk 40, the trunk disconnection circuit 70 disconnects the electrical connection between the first section 41 and the second section 42, thereby disconnecting the electrical connection between the first power line section 31 and the second power line section 32. When the trunk disconnection circuit 70 is in the on state, without disconnecting the electrical connection between the first power line section 31 and the second power line section 32, the first power terminal 11 is electrically connected to the second load terminal 22. Conversely, when the trunk disconnection circuit 70 is in the off state, having disconnected the electrical connection between the first power line section 31 and the second power line section 32, the first power terminal 11 is electrically disconnected from the second load terminal 22. Furthermore, when the trunk disconnection circuit 70 is in the on state, the second power terminal 12 is electrically connected to the first load terminal 21. On the other hand, when the main line disconnection circuit 70 is in the open state, the second power supply terminal 12 is electrically disconnected from the first load terminal 21.

[0063] Load disconnect circuit 80 (reference) Figure 4 This is a disconnection circuit provided in the load wiring 50. The load disconnection circuit 80 is provided at the middle of each of the plurality of first load line portions 51 and the plurality of second load line portions 52. Figure 1 Disconnection circuits D to I). The load disconnection circuit 80 disconnects the electrical connection between the power supply trunk 40 and the load terminal 20 based on an abnormality in at least one of the current value and voltage value in the load wiring 50.

[0064] Multiple load disconnect circuits 80 can share information with each other. Therefore, a load disconnect circuit 80 can disconnect the electrical connection implemented by the load wiring 50 based on an anomaly detected by other load disconnect circuits 80. As an example, the load disconnect circuits 80 of typical lines 51b and 52b disconnect the electrical connection between the power main 40 and typical terminals 21b and 22b based on an anomaly in the current or voltage value detected by the load disconnect circuits 80 of priority lines 51a and 52a (see reference). Figure 9 wait).

[0065] Furthermore, the load disconnection circuit 80 and the trunk disconnection circuit 70 can share information with each other. Therefore, the load disconnection circuit 80 disconnects the electrical connection between the power trunk 40 and the load terminal 20 based on an abnormality in the current or voltage value of the power trunk 40 detected by the trunk disconnection circuit 70. Similarly, the trunk disconnection circuit 70 disconnects the electrical connection between the first power line section 31 and the second power line section 32 based on an abnormality in the current or voltage value of the load wiring 50 detected by the load disconnection circuit 80 (see reference). Figure 24 ).

[0066] <Structure of the disconnect circuit>

[0067] Next, based on Figures 2-4 , refer to Figure 1 The details of the power cut-off circuit 60, the main line cut-off circuit 70, and the load cut-off circuit 80 are explained.

[0068] Figure 2 The power cut-off circuit 60 shown is a unidirectional cutting-off circuit that cuts off only the reverse current of the forward current flowing from the power terminal 10 to the load terminal 20 (power main 40) and the reverse current flowing from the load terminal 20 to the power terminal 10. The power cut-off circuit 60 does not completely cut off the forward current. The power cut-off circuit 60 has a structure including a switching unit 61 as its main body. The switching unit 61 includes a FET (Field Effect Transistor) 62, a current detection unit 66, a voltage detection unit 67, a drive unit 68, and a control unit 69.

[0069] FET62 is an N-channel MOS (Metal-Oxide-Semiconductor) FET. The source of FET62 is connected to the power supply wiring 30 on the power supply section 110 (power supply terminal 10) side. The drain of FET62 is connected to the power supply wiring 30 on the power supply trunk 40 side. The gate of FET62 is connected to the drive section 68. A body diode 63 is formed in FET62. The anode of body diode 63 is connected to the power supply wiring 30 on the power supply section 110 side. The cathode of body diode 63 is connected to the power supply wiring 30 on the power supply trunk 40 side.

[0070] A current detection unit 66 is disposed on the power supply wiring 30 on the side closer to the power supply section 110 than the FET 62. The current detection unit 66 detects the value and direction of the current flowing through the power supply wiring 30. The current detection unit 66 outputs the detected current value and direction to the control unit 69. A voltage detection unit 67 is connected to the power supply wiring 30 on the side closer to the power supply trunk 40 than the FET 62. The voltage detection unit 67 detects the voltage value of the power supply wiring 30. The voltage detection unit 67 outputs the detected voltage value to the control unit 69.

[0071] The driving unit 68 is connected to the gate of the FET 62. Based on a command signal input from the control unit 69, the driving unit 68 applies a predetermined voltage (hereinafter, gate voltage) to the gate of the FET 62. When the driving unit 68 applies the gate voltage, the source and drain of the FET 62 become in a conducting state (on state). Conversely, when no gate voltage is applied, the source and drain of the FET 62 become in a non-conducting state (off state). Furthermore, even when no gate voltage is applied, the FET 62 allows forward current flow from the source to the drain direction via the body diode 63.

[0072] Control unit 69 is connected to drive unit 68. Control unit 69 switches the on / off state of FET 62 by outputting a command signal to drive unit 68, thereby switching the energized and de-energized state of power supply wiring 30. Control unit 69 acquires the current value and direction detected by current detection unit 66 and the voltage value detected by voltage detection unit 67, and reads the latest current and voltage values ​​of power supply wiring 30. Control unit 69 determines the occurrence of an anomaly based on at least one of the current and voltage values. Control unit 69 compares at least one of the current and voltage values ​​with a pre-defined determination threshold. Based on the comparison of the detected values ​​with the determination threshold, control unit 69 detects anomalies such as ground faults, short circuits, and open circuits in the power system or power supply wiring 30. If current flows along a ground fault path and the voltage value is abnormal, control unit 69 determines that a ground fault has occurred. If no current flows and the voltage value is abnormal, control unit 69 determines that an open circuit has occurred. When the control unit 69 detects an abnormality, it cooperates with the drive unit 68 to disconnect the FET 62 and cut off the power supply provided by the power supply wiring 30.

[0073] Figure 3 The trunk line disconnection circuit 70 shown is a bidirectional disconnection circuit that disconnects the current flowing from the first power line section 31 to the second power line section 32, and the current flowing from the second power line section 32 to the first power line section 31. The trunk line disconnection circuit 70 has a structure that includes a switch section 71 as its main body. The switch section 71 switches the energization between the first power line section 31 and the second power line section 32 and disconnects the energization in the power trunk line 40. The switch section 71 includes two FETs 72a and 72b, a current detection section 76, two voltage detection sections 77a and 77b, two drive sections 78a and 78b, and a control section 79.

[0074] FETs 72a and 72b are N-channel MOSFETs. FETs 72a and 72b are interconnected via an intermediate connection line 74. The sources of FETs 72a and 72b are connected to the two ends of the intermediate connection line 74, respectively. The drain of FET 72a is connected to the first section 41. The drain of FET 72b is connected to the second section 42. The gate of FET 72a is connected to the driving section 78a. The gate of FET 72b is connected to the driving section 78b. Body diodes 73a and 73b are formed in FETs 72a and 72b. The anodes of body diodes 73a and 73b are connected to the intermediate connection line 74. The cathode of body diode 73a is connected to the first section 41. The cathode of body diode 73b is connected to the second section 42.

[0075] A current detection unit 76 is disposed on the intermediate connection line section 74. The current detection unit 76 detects the value and direction of the current flowing through the power supply main line 40. The current detection unit 76 outputs the detected current value and direction to the control unit 79. A voltage detection unit 77a is connected to the first section 41 on the first power supply line section 31 side, which becomes FET 72a. The voltage detection unit 77a detects the voltage in the first section 41. A voltage detection unit 77b is connected to the second section 42 on the second power supply line section 32 side, which becomes FET 72b. The voltage detection unit 77b detects the voltage in the second section 42. Each voltage detection unit 77a and 77b outputs the detected voltage value to the control unit 79.

[0076] Driving units 78a and 78b are connected to the gates of FETs 72a and 72b, respectively. Based on a command signal input from the control unit 79, driving units 78a and 78b apply gate voltages to the gates of FETs 72a and 72b. When the driving units 78a and 78b apply gate voltages, the source and drain of FETs 72a and 72b are in a conducting state. Conversely, when no gate voltage is applied, the source and drain of FETs 72a and 72b are in a non-conducting state. Furthermore, by combining two FETs 72a and 72b, the current flowing from the first interval 41 to the second interval 42 is interrupted by the body diode 73a when no gate voltage is applied. Conversely, the current flowing from the second interval 42 to the first interval 41 is interrupted by the body diode 73b.

[0077] The control unit 79 is connected to the two drive units 78a and 78b. By outputting command signals to each drive unit 78a and 78b, the control unit 79 switches the on and off states of each FET 72a and 72b, thereby switching the energized and de-energized states of the power supply line 40. The control unit 79 acquires the current value and direction detected by the current detection unit 76, and the voltage values ​​detected by each voltage detection unit 77a and 77b, and electrically reads the latest current and voltage values ​​of the power supply line 40. Based on at least one of the current and voltage values, the control unit 79 determines that an abnormality has occurred in the power supply line 40, such as a decrease in the supplied power or a sharp increase in the current and voltage values. The control unit 79 acquires a signal indicating the occurrence of an abnormality (hereinafter, an abnormality notification signal) from the load disconnect circuit 80 (control unit 89). Furthermore, in the event of a sticking fault in the switch unit 71, the control unit 79 sends an abnormality notification signal indicating the occurrence of the fault to the load disconnect circuit 80 (control unit 89). When the control unit 79 detects an abnormality or receives an abnormality notification signal from the load cut-off circuit 80, it cooperates with each drive unit 78a and 78b to disconnect each FET 72a and 72b and cut off the power supply to the power main 40.

[0078] Figure 4 The load disconnect circuit 80 shown is a unidirectional disconnect circuit that only disconnects the positive current flowing from the power supply line 40 towards the load terminal 20, and the positive current flowing from the load terminal 20 towards the power supply line 40. The load disconnect circuit 80 does not completely disconnect the reverse current. The load disconnect circuit 80 has a structure that includes a switching unit 81 as its main body. The switching unit 81 includes a FET 82, a current detection unit 86, a voltage detection unit 87, a drive unit 88, and a control unit 89.

[0079] FET82 is an N-channel MOSFET. The source of FET82 is connected to the load wiring 50 on the load side of load portion 120 (load terminal 20). The drain of FET82 is connected to the load wiring 50 on the power supply side of power line 40. The gate of FET82 is connected to the drive portion 88. A body diode 83 is formed in FET82. The anode of body diode 83 is connected to the load wiring 50 on the load side of load portion 120. The cathode of body diode 83 is connected to the load wiring 50 on the power supply side of power line 40.

[0080] A current sensing unit 86 is disposed on the load wiring 50 on the side closer to the power supply line 40 than the FET 82. The current sensing unit 86 detects the value and direction of the current flowing through the load wiring 50. The current sensing unit 86 outputs the detected current value and direction to the control unit 89. A voltage sensing unit 87 is connected to the load wiring 50 on the side closer to the load section 120 than the FET 82. The voltage sensing unit 87 detects the voltage value of the load wiring 50. The voltage sensing unit 87 outputs the detected voltage value to the control unit 89.

[0081] The driving unit 88 is connected to the gate of the FET 82. Based on a command signal input from the control unit 89, the driving unit 88 applies a predetermined gate voltage to the gate of the FET 82. When the driving unit 88 applies the gate voltage, the source and drain of the FET 82 become conductive. Conversely, when no gate voltage is applied, the source and drain of the FET 82 become non-conductive. Furthermore, even when no gate voltage is applied, the FET 82 allows the flow of reverse current from the source to the drain direction via the body diode 83.

[0082] The control unit 89 is connected to the drive unit 88. The control unit 89 switches the on and off states of the FET 82 by outputting a command signal to the drive unit 88, thereby switching the energized and de-energized states of the load wiring 50. The control unit 89 acquires the current value and direction detected by the current detection unit 86 and the voltage value detected by the voltage detection unit 87, and electrically reads the latest current and voltage values ​​of the load disconnection circuit 80. Based on at least one of the current and voltage values, the control unit 89 determines the occurrence of an abnormality in the load wiring 50. Based on processing that compares the detected values ​​with a determination threshold, the control unit 89 detects abnormalities such as a decrease in power supply caused by grounding faults, short circuits, and open circuits in the load system, as well as a sharp increase in current and voltage values. When an abnormality is detected, the control unit 89 sends an abnormality notification signal indicating the occurrence of an abnormality in the load wiring 50 to the control units 89 of other load disconnection circuits 80 and the control unit 79 of the trunk disconnection circuit 70. In the event of a fault such as sticking in the switching unit 81, the control unit 89 sends an abnormality notification signal indicating the occurrence of the fault to other control units 89 and control units 79. The control unit 89 receives abnormality notification signals from other control units 89 indicating the occurrence of abnormalities in other load wiring 50s. When the control unit 89 detects an abnormality or receives an abnormality notification signal from other control units 89, it cooperates with the drive unit 88 to turn the FET 82 off, cutting off the power supply provided by the load wiring 50.

[0083] <Operation of the circuit to cut off when an abnormality occurs>

[0084] The power distribution ECU100 starts upon receiving the power-on command signal. Figure 5 The startup process (S10) is shown. In this startup process, in each power-off circuit 60 and trunk line disconnect circuit 70, each control unit 69, 79 cooperates with each drive unit 68, 78a, 78b to energize each FET 62, 72a, 72b (see reference). Figure 2 as well as Figure 3 Therefore, circuits A, B, and C are switched on (S11). Furthermore, in each load switching circuit 80, the control unit 89 and the drive unit 88 cooperate to energize the FET 82 (see reference). Figure 4 Therefore, the disconnect circuits D to I are switched on (S12). By switching the disconnect circuits A to I on, the main power supply 111 and the auxiliary power supply 112 supply power to the power distribution ECU 100, and the power distribution ECU 100 supplies power to multiple load units 120 (see reference). Figure 6 The state of power supply for loads A to E.

[0085] After the startup process is completed, the power distribution ECU 100 enters a waiting state (S13) awaiting the occurrence of an abnormality. This waiting state continues until the power distribution ECU 100 finishes power distribution control; in other words, it continues until the power distribution ECU 100 becomes disconnected. Then, if an abnormality occurs in the power supply unit 110, the load unit 120, or internally within the power distribution ECU 100, the power distribution ECU 100 performs a disconnection process corresponding to the abnormality mode. After the disconnection process is completed, the power distribution ECU 100 returns to the waiting state. The following is based on... Figures 6 to 30 , refer to Figures 2-4 The various operating modes of the power distribution ECU100 for handling abnormal situations are described in sequence.

[0086] [Operating Mode 1: Ground Fault in Main Power System]

[0087] exist Figures 6-8 In the abnormal scenario 1 shown, a ground fault occurs related to the main power supply 111 (power supply A). A ground fault in the main power supply 111 may occur, for example, due to incorrect wiring between the first power terminal 11 and the main power supply 111, or damage caused by an accident. In the event of a ground fault in the main power supply 111, the power distribution ECU 100 implements... Figure 9 The cut-off process for operating mode 1 is shown. In the cut-off process of operating mode 1, the main line cut-off circuit 70 ( Figure 7 With the disconnection of the disconnection circuit C), the first section 41 of the power supply trunk 40 is isolated from the auxiliary power supply 112. Furthermore, through the load disconnection circuits 80h and 80i... Figure 8The disconnection switching of circuits H and I is implemented with priority given to load 121. Figure 8 Load C) is given priority in power allocation.

[0088] In detail, during the cutoff process in operating mode 1, the control unit 69 of the first cutoff circuit 60a acquires the detection values ​​of the current detection unit 66 and the voltage detection unit 67 (S21). The control unit 69 compares at least one of the voltage value and the current value with a determination threshold to detect the voltage value or an abnormality in the voltage value of the first power line section 31. Based on the abnormality of at least one of the current value and the voltage value, the control unit 69 determines that the main power supply 111 is grounded (S22). Specifically, if, as described above, current flows in the reverse direction of the ground fault path and the voltage value of the first power line section 31 is abnormal, the control unit 69 determines that the main power supply 111 is grounded.

[0089] When the control unit 69 determines that there is a ground fault in the main power supply 111 (S22: "Yes"), it cooperates with the drive unit 68 to put the FET 62 into a cut-off state. As a result, the first cut-off circuit 60a ( Figure 7 The disconnect circuit A) becomes open (S23). Based on the above, since the first power supply terminal 11 is isolated from the power supply trunk 40, the electrical connection between the first power supply terminal 11 and the load terminal 20 is disconnected. Therefore, the reduction in the power supply voltage applied to the power supply trunk 40 from the auxiliary power supply 112 is suppressed. Furthermore, if no abnormality in the current or voltage value is detected (S22: "No"), the disconnection switching of the first disconnect circuit 60a is skipped.

[0090] Here, according to the disconnection switching of the first disconnection circuit 60a, the auxiliary power supply 112 supplies power to all load units 120. Therefore, when the power supply capacity of the auxiliary power supply 112 is insufficient, the power is supplied to the priority load 121 ( Figure 7 The power supply to load C may be insufficient. To avoid this situation, the power distribution ECU 100 periodically interrupts the power supply to the normally supplied load 122. Figure 7 Power supply for loads A, B, D, and E.

[0091] The control unit 79 of the trunk line disconnection circuit 70 acquires the detection values ​​of the current detection unit 76 and the voltage detection units 77a and 77b (S24). The control unit 79 compares at least one of the voltage value and the current value with a determination threshold to detect the occurrence of an abnormality in the power supply trunk 40 (S25). If the control unit 79 determines that an abnormality has occurred in the power supply trunk 40 (S25: "Yes"), it cooperates with the drive units 78a and 78b to put the FETs 72a and 72b into a disconnected state. Thus, the trunk line disconnection circuit 70 ( Figure 7The circuit C is disconnected (S26). Based on the above, the electrical connection between the second power supply terminal 12 and the first load terminal 21 is disconnected, and the power supply to the normal load 122 is interrupted. Figure 7 The power supply to loads A and B is stopped. Additionally, if no abnormality occurs in the power supply main line 40 (S25: "No"), the disconnection switching of the main line disconnection circuit 70 is skipped.

[0092] Furthermore, if the power supply to the priority load 121 is insufficient after the main line disconnection circuit 70 is switched off, the power distribution ECU 100 will interrupt the power supply to other normal loads 122. Figure 7 The power supply to loads D and E. The control unit 89 of the load disconnect circuit 80g disposed in the second priority line section 52a acquires the detection values ​​of the current detection unit 86 and the voltage detection unit 87 (S27). The control unit 89 compares at least one of the voltage value and the current value with a determination threshold to detect the occurrence of an abnormality in the second priority line section 52a. Specifically, the control unit 89 detects a decrease in the power supplied to the priority load 121 (S28). If a decrease in the power supply is detected (S28: "Yes"), the control unit 89 sends an abnormality notification signal indicating a decrease in the power supply to each control unit 89 of the load disconnect circuits 80h and 80i disposed in the second normal line section 52b.

[0093] Based on the receipt of an abnormal notification signal, the control units 89 of the load disconnection circuits 80h and 80i cooperate with the drive unit 88 to put the FET 82 into a disconnected state. Thus, the load disconnection circuits 80h and 80i ( Figure 8 The disconnect circuits H and I are in the open state (S29). Based on the above, in each of the second normal line sections 52b, the electrical connection between the second interval 42 and the second normal terminal 22b is disconnected, and the power supply to the normal load 122 is further stopped. As a result, the load on the auxiliary power supply 112 is reduced, and sufficient power is continuously supplied to the priority load 121. Furthermore, if no reduction in the supplied power is detected (S28: "No"), the disconnection switching of the load disconnect circuits 80h and 80i is skipped.

[0094] [Operating Mode 2: Grounding fault in the main power system and adhesion of the trunk line disconnection circuit]

[0095] exist Figure 10 as well as Figure 11 In abnormal scenario 2, similar to abnormal scenario 1 described above, a ground fault related to the main power supply 111 (power supply A) occurs. Furthermore, due to adhesion of the trunk line disconnection circuit 70, the power trunk line 40 cannot be disconnected. In this situation, the power distribution ECU 100 performs... Figure 12The cutting-off process for operating mode 2 is shown. S31 to S36 of the cutting-off process in operating mode 2 are the same as those in operating mode 1 (refer to...). Figure 9 S21 to S26 are essentially the same. In the cutoff process of operating mode 2, the load cutoff circuits 80d and 80e are used. Figure 11 Disconnection switching of circuits D and E) is implemented to prioritize load 121 ( Figure 8 Load C) is given priority in power allocation.

[0096] In detail, during the disconnection process in operating mode 2, the control units 89 of the load disconnection circuits 80f and 80g receive an abnormal notification signal indicating a sticking fault from the control unit 79 of the main line disconnection circuit 70, thereby detecting the sticking in the main line disconnection circuit 70. Furthermore, the control unit 89 acquires the detection values ​​from the current detection unit 86 and the voltage detection unit 87 (S37). The control unit 89 compares at least one of the voltage and current values ​​with a determination threshold to detect the occurrence of an abnormality in the priority lines 51a and 52a. Specifically, the control unit 89 detects a decrease in the power supplied to the priority load 121 (S38). When the control unit 89 detects a sticking fault in the main line disconnection circuit 70 and a decrease in the power supplied to the priority load 121 (S38: "Yes"), it sends an abnormal notification signal indicating a decrease in the power supplied to the control units 89 of the load disconnection circuits 80d and 80e of the first normal line 51b.

[0097] Based on the receipt of an abnormal notification signal, the control units 89 of the load disconnection circuits 80d and 80e cooperate with the drive unit 88 to put the FET 82 into a disconnected state. Thus, the load disconnection circuits 80d and 80e ( Figure 11 The disconnect circuits D and E are switched off (S39). Based on the above, in each first normal line section 51b, the electrical connection between the first interval 41 and the first normal terminal 21b is disconnected, and the power supply to the normal load 122 is stopped. As a result, the load on the auxiliary power supply 112 is reduced, and sufficient power is continuously supplied to the priority load 121. Furthermore, if no reduction in power supply is detected (S38: "No"), the switching off of the load disconnect circuits 80d and 80e is skipped.

[0098] [Operating Mode 3: Open Circuit of Power System]

[0099] exist Figure 13 as well as Figure 14In the abnormal scenario 3 shown, the connection between the main power supply 111 (power supply A) and the first power terminal 11 is disconnected (open circuit), and the main power supply 111 fails. The failure of the main power supply 111 may be caused by factors such as incorrect wiring between the first power terminal 11 and the main power supply 111, damage caused by an accident, or a malfunction of the main power supply 111. In the event of a failure of the main power supply 111, the power distribution ECU 100 implements... Figure 15 The cut-off process for operating mode 3 is shown. In the cut-off process of operating mode 3, the main line cut-off circuit 70 is also used. Figure 13 The disconnection switching of the disconnection circuit C) isolates the first section 41 of the power supply trunk 40 from the auxiliary power supply 112. Furthermore, the load disconnection circuits 80h and 80i ( Figure 14 The disconnection switching of circuits H and I is implemented with priority given to load 121. Figure 14 Load C) is given priority in power allocation.

[0100] In detail, during the disconnection process in operating mode 3, the control unit 79 of the trunk disconnection circuit 70 acquires the detection values ​​of the current detection unit 76 and the voltage detection units 77a and 77b (S41). The control unit 79 compares at least one of the voltage value and the current value with a judgment threshold to detect the voltage value or an abnormality in the power trunk 40. After the failure of the main power supply 111, the auxiliary power supply 112 supplies power to all load units 120. Therefore, the control unit 79 detects the decrease in the current value or voltage value in the power trunk 40 caused by insufficient power supply capacity of the auxiliary power supply 112 as an abnormality (S42). Alternatively, the first disconnection circuit 60a can also be implemented after the failure of the main power supply 111. Figure 13 Disconnection switching of circuit A).

[0101] When the control unit 79 detects an abnormality in the power supply trunk 40 (S42: "Yes"), it cooperates with the drive units 78a and 78b to put FETs 72a and 72b into a cut-off state. As a result, the trunk cut-off circuit 70 ( Figure 13 The circuit C is disconnected (S43). Based on the above, since the first section 41 is isolated from the second power supply terminal 12, the electrical connection between the second power supply terminal 12 and the first load terminal 21 is broken. Therefore, the electrical connection to a portion of the normal load 122 ( Figure 13 The power supply to loads A and B is stopped. Additionally, if no abnormality is detected in the power supply trunk 40 (S42: "No"), the disconnection switching of the trunk disconnection circuit 70 is skipped.

[0102] Furthermore, if the power supply to the priority load 121 is insufficient after the main line disconnection circuit 70 is switched off, the power distribution ECU 100 will interrupt the power supply to other normal loads 122. Figure 14 Power supply to loads D and E. The control unit 89 of the load disconnect circuit 80g, located in the second priority line section 52a, acquires the detection values ​​of the current detection unit 86 and the voltage detection unit 87 (S44). The control unit 89 detects the current value or an abnormality in the current value in the second priority line section 52a, that is, it detects a decrease in the power supply to the priority load 121 (S45). If a decrease in the power supply is detected (S45: "Yes"), the control unit 89 sends an abnormality notification signal indicating a decrease in the power supply to each control unit 89 of the load disconnect circuits 80h and 80i located in the second normal line section 52b.

[0103] Based on the receipt of an abnormal notification signal, the control units 89 of the load disconnection circuits 80h and 80i cooperate with the drive unit 88 to put the FET 82 into a disconnected state. Thus, the load disconnection circuits 80h and 80i ( Figure 14 The disconnect circuits H and I are switched off (S46). Based on the above, in each of the second normal line sections 52b, the electrical connection between the second interval 42 and the second normal terminal 22b is disconnected, further stopping the power supply to the normal load 122. As a result, the load on the auxiliary power supply 112 is reduced, and sufficient power is continuously supplied to the priority load 121. Furthermore, if no reduction in power supply is detected (S45: "No"), the switching off of the load disconnect circuits 80h and 80i is skipped.

[0104] [Operating Mode 4: Ground Fault in Load System]

[0105] exist Figure 16 as well as Figure 17 In the abnormal scenario 4 shown, a ground fault occurs related to the normal load 122 (load A). A ground fault related to the normal load 122 may occur, for example, due to incorrect wiring between the first normal terminal 21b and the normal load 122, damage caused by an accident, or a fault in the normal load 122. In the event that a ground fault has occurred in the path connected to the normal load 122, the power distribution ECU 100 implements... Figure 18 The cutoff process for operating mode 4 is shown. In the cutoff process of operating mode 4, the load cutoff circuit 80 ( Figure 16 The disconnection of the disconnect circuit D interrupts the power supply to the normally operating load 122, which has experienced a ground fault. Furthermore, if the load disconnect circuit 80 is stuck and isolation of the normally operating load 122, which has experienced a ground fault, is difficult, the power is supplied through the main disconnect circuit 70. Figure 17 With the disconnection switching of the circuit C), the first interval 41 is isolated from the auxiliary power supply 112.

[0106] In detail, during the disconnection process in operating mode 4, the load disconnection circuit 80d, configured in the first normal line section 51b associated with the normal load 122 that has experienced a ground fault, is used. Figure 16 The control unit 89 of the circuit cut-off (D) acquires the detection values ​​of the current detection unit 86 and the voltage detection unit 87 (S51). The control unit 69 compares at least one of the voltage value and the current value with a determination threshold to detect the voltage value or an abnormality in the voltage value of the first normal line 51b. Specifically, the control unit 89 determines that there is a ground fault in the path connected to the normal load 122 based on the abnormality of at least one of the current value and the voltage value (S52). Specifically, if, as described above, current flows in the forward direction toward the ground fault path and the voltage value of the first normal line 51b is an abnormal value, the control unit 89 determines that there is a ground fault in the normal load 122.

[0107] When the control unit 89 determines that a ground fault has occurred in the normal load 122 (S52: "Yes"), it cooperates with the drive unit 88 to put the FET 82 into a cut-off state. As a result, the load disconnection circuit 80d becomes disconnected (S53). Based on the above, since the first normal terminal 21b is isolated from the power supply line 40, the flow of current towards the path where the ground fault has occurred is cut off. Furthermore, if no abnormality in current or voltage value is detected (S52: "No"), the disconnection switching of the load disconnection circuit 80d is skipped.

[0108] Here, if the first normal line section 51b cannot be cut off due to adhesion of the load disconnection circuit 80d, the control unit 79 of the trunk disconnection circuit 70 receives an abnormality notification signal indicating adhesion from the control unit 89 of the load disconnection circuit 80d, which has experienced adhesion failure. Furthermore, the control unit 79 acquires the detection values ​​from the current detection unit 76 and the voltage detection units 77a and 77b (S54). The control unit 79 compares at least one of the voltage and current values ​​with a determination threshold to detect the occurrence of an abnormality in the power trunk 40 (S55).

[0109] Upon detecting a sticking fault in the load disconnection circuit 80d and determining that an abnormality has occurred in the power supply trunk 40 (S55: "Yes"), the control unit 79, in cooperation with the drive units 78a and 78b, disconnects the FETs 72a and 72b. Consequently, the trunk disconnection circuit 70 ( Figure 17The disconnect circuit C) becomes open (S56). Based on the above, since the first section 41 is isolated from the second power supply terminal 12, the electrical connection between the second power supply terminal 12 and the first load terminal 21 is severed. As a result, at least the power supply to the normal load 122 associated with the ground fault is stopped, and sufficient power can be supplied to the priority load 121. Furthermore, if no abnormality in current or voltage value is detected (S55: "No"), the disconnection switching of the main line disconnect circuit 70 is skipped.

[0110] [Operating Mode 5: Grounding fault in the auxiliary power supply system and the resulting voltage drop in the main power supply]

[0111] exist Figure 19 as well as Figure 20 In the abnormal scenario 5 shown, a ground fault occurs related to auxiliary power supply 112 (power supply B). A ground fault in auxiliary power supply 112 may occur, for example, due to incorrect wiring between the second power terminal 12 and auxiliary power supply 112, or damage caused by an accident. In the event of a ground fault in auxiliary power supply 112, the power distribution ECU 100 implements... Figure 21 The cut-off process in operating mode 5 is shown. In the cut-off process of operating mode 5, the second cut-off circuit 60b ( Figure 19 With the disconnection of the disconnection circuit B), the auxiliary power supply 112 is isolated from the power main line 40. Furthermore, in the event that the second disconnection circuit 60b is not functioning properly, the main line disconnection circuit 70 (… Figure 20 With the disconnection switching of the cut-off circuit C), the second interval 42 is isolated from the main power supply 111.

[0112] In detail, during the cutoff process in operating mode 5, the control unit 69 of the second cutoff circuit 60b acquires the detection values ​​of the current detection unit 66 and the voltage detection unit 67 (S61). The control unit 69 compares at least one of the voltage value and the current value with a determination threshold to detect the voltage value or an abnormality in the voltage value of the second power line 32. Based on the abnormality of at least one of the current value and the voltage value, the control unit 69 determines that the auxiliary power supply 112 is grounded (S62). Specifically, if, as described above, current flows in the reverse direction of the ground fault path and the voltage value of the second power line 32 is abnormal, the control unit 69 determines that the auxiliary power supply 112 is grounded.

[0113] If the control unit 69 determines that there is a ground fault in the auxiliary power supply 112 (S62: "Yes"), it cooperates with the drive unit 68 to turn off the FET 62. As a result, the second cut-off circuit 60b is disconnected (S63). Based on the above, the electrical connection between the second section 42 and the second power supply terminal 12 is severed, suppressing the increase in current load from the second section 42 towards the auxiliary power supply 112. Furthermore, if there is no ground fault in the auxiliary power supply 112 (S62: "No"), the disconnection switching of the second cut-off circuit 60b is skipped.

[0114] Here, the main power supply 111 may not respond in time due to a decrease in the output voltage of the main power supply 111, and the second cutoff circuit 60b ( Figure 20 In the case where the disconnect circuit (B) becomes inoperable, the control unit 79 of the main line disconnect circuit 70 acquires the detection values ​​from the current detection unit 76 and the voltage detection units 77a and 77b (S64). The control unit 79 compares at least one of the voltage and current values ​​with a determination threshold to detect the occurrence of an abnormality in the power supply main line 40 (S65). For example, the control unit 79 detects an increase in the current load on the power supply main line 40 based on the acquired current value.

[0115] When the control unit 79 detects an abnormality in the power supply trunk 40 (S65: "Yes"), it cooperates with the drive units 78a and 78b to put FETs 72a and 72b into a cut-off state. As a result, the trunk cut-off circuit 70 ( Figure 20 The circuit C is disconnected (S66). Based on the above, since the second section 42 is isolated from the first section 41, the electrical connection between the first power supply terminal 11 and the second load terminal 22 is severed. As a result, the power supply to the normal load 122 ( Figure 20 The power supply to loads H and I is stopped, enabling the power supply to load 120 (connected to the first section 41) to be cut off. Figure 20 Sufficient power is supplied to loads A through C. Furthermore, if no abnormality in current or voltage is detected (S65: "No"), the disconnection switching of the main line disconnection circuit 70 is skipped.

[0116] [Operating Mode 6: Increased current consumption in the load system]

[0117] exist Figure 22 as well as Figure 23 In the abnormal scenario 6 shown, the current consumption of the normal load 122 (disconnect circuit E) connected to the second normal terminal 22b increases. In this case, the power distribution ECU 100 implements... Figure 24 The cut-off process for operating mode 6 is shown. In the cut-off process of operating mode 6, the main line cut-off circuit 70 ( Figure 23The disconnection switching of the disconnecting circuit C) cuts off the electrical connection between the main power supply 111 (first power terminal 11) and the second section 42. Additionally, it can be done at other normal loads 122 ( Figure 22 When the current consumption of the circuits A, B, and D increases, the same cutting-off process of working mode 6 is also implemented.

[0118] In detail, during the cutoff process in operating mode 6, the control unit 89 of the load cutoff circuit 80i acquires the detection values ​​of the current detection unit 86 and the voltage detection unit 87 (S71). The control unit 89 compares at least one of the voltage value and the current value with a determination threshold to detect an abnormality in the detection value in the second normal line section 52b (S72). For example, the control unit 89 detects an increase in the current consumption flowing through the second normal line section 52b based on the acquired current value.

[0119] When the control unit 89 detects an increase in the current consumption in the second normal line section 52b (S72: "Yes"), it sends an abnormality notification signal indicating the increase in current consumption to the control unit 79 of the trunk line disconnection circuit 70. Based on the receipt of the abnormality notification signal, the control unit 79, in cooperation with the drive units 78a and 78b, puts FETs 72a and 72b into a disconnected state. Thus, the trunk line disconnection circuit 70 ( Figure 23 The circuit C is disconnected (S73). Based on the above, the normal load 122 (which is already connected to the second normal terminal 22b) is switched off. Figure 23 The power supply to loads D and E is stopped. Additionally, if no increase in current consumption is detected (S72: "No"), the disconnection switching of the main line disconnection circuit 70 is skipped.

[0120] [Operating Mode 7: Auxiliary power supply protection under overvoltage]

[0121] exist Figure 25 as well as Figure 26 In the abnormal scenario 7 shown, a normal disconnection switch is performed on the load disconnection circuit 80d (disconnection circuit D) of the first normal line 51b connected to the first interval 41. At this time, due to the sharp decrease in the current supplied by the main power supply 111, the output voltage of the main power supply 111 may rise sharply. The sharp rise in the output voltage of the main power supply 111 may cause an overvoltage to be applied to the auxiliary power supply 112, thereby causing a failure of the auxiliary power supply 112. To avoid such a situation, the power distribution ECU 100 performs... Figure 27 The cut-off process for operating mode 7 is shown. In the cut-off process of operating mode 7, the main line cut-off circuit 70 ( Figure 26 The disconnection switching of the cut-off circuit C) prevents the application of overvoltage to the auxiliary power supply 112.

[0122] In detail, during the disconnection process in operating mode 7, the control unit 79 of the trunk disconnection circuit 70 acquires the detection values ​​from the current detection unit 76 and the voltage detection units 77a and 77b (S81). The control unit 79 compares at least one of the voltage value and the current value with a determination threshold to detect an abnormality in the detection value in the power trunk 40 (S82). In this case, the control unit 79 detects the generation of overvoltage on the first interval 41 side based on the voltage value acquired from the voltage detection unit 77a.

[0123] When the control unit 79 detects an overvoltage on the first interval 41 side (S82: "Yes"), it cooperates with the drive units 78a and 78b to turn off FETs 72a and 72b. As a result, the trunk line disconnection circuit 70 ( Figure 26 The disconnect circuit C) becomes open (S83). As a result, since the second power supply terminal 12 is isolated from the first interval 41, the application of overvoltage to the auxiliary power supply 112 can be prevented. In addition, if no overvoltage is detected (S82: "No"), the disconnection switching of the main line disconnect circuit 70 is skipped.

[0124] [Operating Mode 8: Grounding Fault in Power Cabling]

[0125] exist Figure 28 as well as Figure 29 In the abnormal scenario 8 shown, a ground fault occurs in the power supply wiring KH within the power distribution ECU 100. This abnormality in the power supply wiring KH may be caused by damage from an accident or a fault in the printed circuit board. In this abnormal scenario 8, due to the large current flowing through the ground fault path, the voltage of the power supply trunk 40 may decrease, resulting in insufficient power supply to the priority load 121. As an example, in the case of a ground fault occurring in the first power line portion 31 on the power supply trunk 40 side relative to the first disconnect circuit 60a (disconnect circuit A), the power distribution ECU 100 implements... Figure 30 The cut-off process in operating mode 8 is shown. In the cut-off process of operating mode 8, the first cut-off circuit 60a ( Figure 29 With the disconnection of the disconnection circuit A), the main power supply 111 is electrically isolated from the first power line section 31. Furthermore, through the trunk disconnection circuit 70 ( Figure 29 The disconnection switching of the circuit C) isolates the first section 41, which is connected to the ground fault path, from the second section 42.

[0126] In detail, during the cutoff process in operating mode 8, the control unit 69 of the first cutoff circuit 60a acquires the detection values ​​of the current detection unit 66 and the voltage detection unit 67 (S91). The control unit 69 compares at least one of the voltage and current values ​​with a determination threshold to determine whether the first power line section 31 on the power supply trunk 40 side has a ground fault (S92). If the control unit 69 determines that the first power line section 31 has a ground fault (S92: "Yes"), it cooperates with the drive unit 68 to put the FET 62 into a cutoff state. Thus, the first cutoff circuit 60a ( Figure 29 The disconnect circuit A) is in the open state (S93). As a result, it is possible to prevent a large current from flowing through the ground fault path of the first power line section 31. In addition, if it is determined that no ground fault has occurred in the first power line section 31 (S92: "No"), the disconnection switching of the first disconnect circuit 60a is skipped.

[0127] Furthermore, the control unit 79 of the trunk line disconnection circuit 70 acquires the detection values ​​of the current detection unit 76 and the voltage detection units 77a and 77b (S94). The control unit 79 compares at least one of the voltage value and the current value with a determination threshold to determine whether a ground fault has occurred on the first interval 41 side (S95). If the control unit 79 determines that a ground fault has occurred on the first interval 41 side (S95: "Yes"), it cooperates with the drive units 78a and 78b to put FETs 72a and 72b into a disconnected state. Thus, the trunk line disconnection circuit 70 ( Figure 29 The disconnect circuit C) becomes open (S26). Based on the above, since the first section 41 and the second section 42 are disconnected, the voltage drop in the second section 42 is suppressed. As a result, power supply can continue to the priority load 121 and the normal load 122, which are already connected to the second load terminal 22. Furthermore, if it is determined that no ground fault has occurred on the first section 41 side (S95: "No"), the disconnection switching of the main line disconnect circuit 70 is skipped.

[0128] (Summary of Implementation Methods)

[0129] In this embodiment described above, based on an anomaly in at least one of the current or voltage values, the electrical connection between the first power line section 31 and the second power line section 32 is severed by the trunk line disconnection circuit 70, and the first power line section 31 and the second power line section 32 can be electrically isolated. Based on the above, even in the event of an anomaly in the circuit related to the power distribution ECU 100, power supply from the multiple power supply sections 110 to the multiple load terminals 20 can be appropriately maintained, and power supply to the load sections 120 connected to each load terminal 20 can be appropriately maintained.

[0130] To explain in more detail, the power distribution ECU 100, by providing a power cut-off circuit 60 on the power trunk 40 connecting the multiple power terminals 10, can appropriately supply power to the multiple load units 120 even if a part of the power supply wiring KH malfunctions. Specifically, by switching the on and off states of the power cut-off circuit 60, the power distribution ECU 100 can receive power from the multiple power supply units 110 and appropriately distribute power to the multiple load units 120. Based on the above, the power distribution ECU 100 can achieve redundancy in correctly supplying power to each load unit 120 even if the power system or load system malfunctions.

[0131] Furthermore, in this embodiment, the power trunk line 40 is electrically connected to both the first power line section 31 and the second power line section 32. Moreover, the trunk line disconnection circuit 70 includes a switch section 71 in the power trunk line 40 for switching the energization between the first power line section 31 and the second power line section 32 and for cutting off the energization. According to the above structure, the trunk line disconnection circuit 70 can quickly cut off the energization between the first power line section 31 and the second power line section 32 through the operation of the switch section 71. As a result, the power distribution ECU 100 can more smoothly control the power distribution to the load section 120 when an anomaly occurs.

[0132] Furthermore, in this embodiment, the first load terminal 21, which is electrically connected to the first power line section 31, and the second load terminal 22, which is electrically connected to the second power line section 32, are included in the plurality of load terminals 20. With this structure, even if one of the plurality of power supply sections 110 malfunctions, power supply to at least one of the first load terminal 21 and the second load terminal 22 can continue.

[0133] Furthermore, in this embodiment, the first power terminal 11 is electrically connected to the second load terminal 22 when the trunk line disconnection circuit 70 has not disconnected the electrical connection between the first power line portion 31 and the second power line portion 32. On the other hand, when the trunk line disconnection circuit 70 has disconnected the electrical connection between the first power line portion 31 and the second power line portion 32, the first power terminal 11 is electrically disconnected from the second load terminal 22. Additionally, the second power terminal 12 is electrically connected to the first load terminal 21 when the trunk line disconnection circuit 70 has not disconnected the electrical connection between the first power line portion 31 and the second power line portion 32. On the other hand, when the trunk line disconnection circuit 70 has disconnected the electrical connection between the first power line portion 31 and the second power line portion 32, the second power terminal 12 is electrically disconnected from the first load terminal 21. As described above, by the power-on disconnection performed by the trunk line disconnection circuit 70, the second load terminal 22 and the first load terminal 21 can be electrically isolated from the first power terminal 11 and the second power terminal 12. As a result, even in the event of an anomaly in the power supply system or load system, the power distribution ECU 100 can continue to supply power to a portion of the load terminals 20.

[0134] Furthermore, in this embodiment, at least one of the first power line section 31 and the second power line section 32 is provided with a power disconnection circuit 60 that cuts off the electrical connection between the power terminal 10 and the load terminal 20. Thus, if a power disconnection circuit 60, different from the main line disconnection circuit 70, is provided in the power supply wiring KH, power disconnection by the power disconnection circuit 60 can be performed even if the main line disconnection circuit 70 malfunctions. As a result, the power distribution ECU 100 can more reliably continue to supply appropriate power to the load section 120.

[0135] Furthermore, the power cut-off circuit 60 of this embodiment cuts off the electrical connection between the power supply terminal 10 and the load terminal 20 based on an abnormality in at least one of the current and voltage values ​​caused by a ground fault related to the power supply unit 110. Based on the above, the power distribution ECU 100 can electrically isolate the power supply unit 110 related to the ground fault from the power supply wiring KH by cutting off the power supply to the power supply circuit 60. As a result, power can continue to be supplied from the normal power supply unit 110 to the load unit 120.

[0136] Furthermore, in this embodiment, the first load line portion 51 electrically connects the first load terminal 21 to a first section 41 in the power supply trunk 40, on the side closer to the first power line portion 31 than the trunk line disconnection circuit 70. Additionally, the second load line portion 52 electrically connects the second load terminal 22 to a second section 42 in the power supply trunk 40, on the side closer to the second power line portion 32 than the trunk line disconnection circuit 70. According to the above structure, by cutting off the power supply to the power supply trunk 40 through the trunk line disconnection circuit 70, the first load terminal 21 and the second load terminal 22 are electrically isolated. As a result, even in the event of an abnormality, the power distribution ECU 100 can continue to supply power from the normal power supply portion 110 to the normal load portion 120.

[0137] Furthermore, in this embodiment, at least one of the first load line portion 51 and the second load line portion 52 is provided with a load disconnection circuit 80 that cuts off the electrical connection between the power supply trunk 40 and the load terminal 20. Thus, if a load disconnection circuit 80, different from the trunk disconnection circuit 70, is provided in the power supply wiring KH, power disconnection by the load disconnection circuit 80 can be performed even if the trunk disconnection circuit 70 malfunctions. As a result, the power distribution ECU 100 can more reliably continue to supply appropriate power to the load portion 120.

[0138] Furthermore, the load disconnection circuit 80 of this embodiment disconnects the electrical connection between the power supply terminal 10 and the load terminal 20 based on an abnormality in at least one of the current or voltage value caused by a ground fault related to the load unit 120. Based on the above, the power distribution ECU 100 can electrically isolate the load unit 120 related to the ground fault from the power supply wiring KH by energizing and disconnecting the load disconnection circuit 80. As a result, power can continue to be supplied to other normal load units 120.

[0139] Furthermore, in this embodiment, at least one of the first load terminal 21 and at least one of the second load terminal 22 are designated as a first priority terminal 21a and a second priority terminal 22a, respectively. Moreover, the first priority terminal 21a and the second priority terminal 22a are electrically connected to the same priority load 121 among the plurality of load units 120 that receives preferential power supply compared to other normal loads 122. According to the above structure, even if an anomaly occurs in the power supply system or load system, and the trunk line disconnection circuit 70 disconnects the power supply trunk 40, power supply to the priority load 121 can continue.

[0140] Furthermore, in this embodiment, the first priority terminal 21a and the second priority terminal 22a are electrically connected to the priority load 121 that requires redundancy. Therefore, even if an anomaly occurs in the power supply system or load system, the power distribution ECU 100 can continue to supply power to the priority load 121 that requires redundancy.

[0141] Furthermore, in this embodiment, the first priority terminal 21a and the second priority terminal 22a are adjacent to each other. Therefore, even in a configuration where multiple terminals are connected to a single priority load 121, the connection operation can be smoothly performed during the connection process between the power distribution ECU 100 and the priority load 121.

[0142] Furthermore, in this embodiment, the first priority terminal 21a and the second priority terminal 22a are electrically connected to the priority load 121, which is preferentially supplied with power among the plurality of load units 120. Additionally, the first normal terminal 21b and the second normal terminal 22b are electrically connected to the normal load 122, which is other than the priority load 121. Furthermore, the first priority line portion 51a and the second priority line portion 52a electrically connect the first priority terminal 21a and the second priority terminal 22a to the power supply trunk 40. Similarly, the first normal line portion 51b and the second normal line portion 52b electrically connect the first normal terminal 21b and the second normal terminal 22b to the power supply trunk 40. Moreover, the load disconnection circuits 80d, 80e, 80h, and 80i disconnect the power supply trunk 40 from the first normal terminal 21b and the second normal terminal 22b based on the current value or an abnormality in the first priority line portion 51a or the second priority line portion 52a. Based on the above, in abnormal scenarios 1 to 3 where the power supply to the power distribution ECU 100 is insufficient, power can be supplied to the priority load 121 with higher priority than other normal loads 122.

[0143] Furthermore, power is supplied from the main power supply 111 to the first power terminal 11 of this embodiment. On the other hand, power is supplied from the auxiliary power supply 112, which has a lower supply capacity than the main power supply 111, to the second power terminal 12. As described above, the power distribution ECU 100 can appropriately control the power distribution to each load unit 120 even when there are differences in the power supply capacity of the multiple power supply units 110 connected to each power terminal 10.

[0144] Furthermore, in this embodiment, the second priority line portion 52a electrically connects the second priority terminal 22a to the second section 42 of the power supply trunk 40. Additionally, the second normal line portion 52b electrically connects the second normal terminal 22b to the second section 42. Moreover, when the trunk line disconnection circuit 70 has disconnected the power supply to the power supply trunk 40, the load disconnection circuits 80h and 80i disconnect the electrical connection between the power supply trunk 40 and the second normal line portion 52b, based on the current value in the second priority line portion 52a or an abnormality in the current value. Based on the above, in abnormal scenarios such as 1 and 3 where there is insufficient power even when the power supply to the power supply trunk 40 is disconnected by the trunk line disconnection circuit 70, power can be supplied to the priority load 121 with higher priority relative to other normal loads 122.

[0145] Furthermore, in this embodiment, the first priority line portion 51a electrically connects the first priority terminal 21a to the first section 41 of the power supply trunk 40. Additionally, the first normal line portion 51b electrically connects the first normal terminal 21b to the first section 41. Moreover, when the trunk line disconnection circuit 70 cannot disconnect the power supply trunk 40, the load disconnection circuits 80d and 80e disconnect the electrical connection between the power supply trunk 40 and the first normal terminal 21b implemented by the first normal line portion 51a based on the current value in the first priority line portion 51a or an abnormal current value. Based on the above, even in abnormal scenarios such as scenario 2 where the trunk line disconnection circuit 70 experiences a sticking fault and cannot disconnect the power supply trunk 40, power can still be supplied to the higher priority load 121 with priority over other normal loads 122.

[0146] Furthermore, the trunk line disconnection circuit 70 of this embodiment includes an electrical fuse EF. This trunk line disconnection circuit 70, with its structure, can repeatedly switch between energizing and de-energizing. That is, switching from an off state to an on state can be performed without replacing components. As a result, the power distribution ECU 100 can quickly switch the trunk line disconnection circuit 70 on and restart power supply to each load unit 120.

[0147] Furthermore, the trunk line disconnection circuit 70 of this embodiment disconnects both the current flowing from the first power line section 31 to the second power line section 32 and the current flowing from the second power line section 32 to the first power line section 31. Therefore, the trunk line disconnection circuit 70 can reliably disconnect the first section 41 and the second section 42 in the event of an abnormality in the circuit related to the power distribution ECU 100.

[0148] Furthermore, the power cut-off circuit 60 of this embodiment cuts off the reverse current of the forward current flowing from the power terminal 10 to the load terminal 20 and the reverse current flowing from the load terminal 20 to the power terminal 10. That is, the power cut-off circuit 60 does not completely cut off the forward current. With such a structure, the power cut-off circuit 60 can maintain a simple construction, and in abnormal scenarios such as grounding faults occurring on the connection line to the main power supply 111 (see...) Figure 7 It reliably interrupts the current toward the path of the ground fault.

[0149] Furthermore, the load disconnection circuit 80 of this embodiment disconnects the positive current flowing from the power supply trunk 40 toward the load terminal 20 and the reverse current flowing from the load terminal 20 toward the power supply trunk 40. That is, the load disconnection circuit 80 does not completely disconnect the reverse current. With such a structure, the load disconnection circuit 80 can maintain a simple construction, and in abnormal scenarios such as grounding faults occurring in the connection line with the load section 120 (see reference 4) Figure 17 In this system, current can be reliably blocked from the path of a ground fault.

[0150] In the above embodiment, power terminal 10 corresponds to a "power terminal section", load terminal 20 corresponds to a "load terminal section", first priority terminal 21a and second priority terminal 22a correspond to "priority terminals", and first normal terminal 21b and second normal terminal 22b correspond to "normal terminals". Power trunk line 40 corresponds to a "power trunk line section", first section 41 corresponds to a "main section", and second section 42 corresponds to an "auxiliary section". Furthermore, first priority line section 51a and second priority line section 52a correspond to "priority supply line section", first normal line section 51b and second normal line section 52b correspond to "normal supply line section", and power distribution ECU 100 corresponds to a "vehicle control device".

[0151] (Other implementation methods)

[0152] The above describes one embodiment of the present disclosure, but the present disclosure is not limited to the above embodiment and can be applied to various embodiments and combinations without departing from the spirit of the present disclosure.

[0153] In Variation 1 of the above embodiment, a power cut-off circuit 60 capable of interrupting bidirectional current is used. That is, the power cut-off circuit 60 can also be... Figure 3 The power supply disconnect circuit 60 has the same circuit structure as the trunk line disconnect circuit 70 shown. The power supply disconnect circuit 60 disconnects both the forward current flowing from the power supply terminal 10 to the load terminal 20 and the reverse current flowing from the load terminal 20 to the power supply terminal 10. Therefore, regardless of abnormal scenarios such as a ground fault occurring in the connection line to the main power supply 111 or a ground fault occurring in the power wiring 30 on the power trunk line 40 side, the power supply disconnect circuit 60 can reliably disconnect the current flowing towards the ground fault path.

[0154] In variation 2 of the above-described embodiment, the following was used: Figure 31The trunk line disconnection circuit 70 is shown. In the trunk line disconnection circuit 70, a current detection unit 76 is provided in a first interval 41 on the side of the voltage detection unit 77a closest to the first power line portion 31. The current detection unit 76 detects the current value and current direction in the first interval 41. As in the modified example 2 above, the circuit structure of the trunk line disconnection circuit 70 can be appropriately modified. For example, the current detection unit 76 can also be provided in a second interval 42 on the side of the voltage detection unit 77b closest to the second power line portion 32.

[0155] In variation 3 of the above-described embodiment, the following was used: Figure 32 The load disconnect circuit 80 is shown. In the load disconnect circuit 80, a current detection unit 86 is provided on the load wiring 50 on the side of the load portion 120 relative to the voltage detection unit 87. The current detection unit 86 detects the current value and current direction between the FET 82 and the load terminal 20. As in the above modified example 3, the circuit structure of the load disconnect circuit 80 can be appropriately modified.

[0156] Alternatively, the power cut-off circuit 60 can also be... Figure 31 The trunk line disconnection circuit 70 shown has the same circuit structure. Furthermore, the power disconnection circuit 60 can also be configured as... Figure 32 The load cut-off circuit 80 shown has the same circuit structure and is capable of cutting off reverse current.

[0157] In the trunk line disconnection circuit 70 of the above-described embodiment, a current detection unit 76 is provided, but a voltage detection unit 77 is not provided. The control unit 79 performs the disconnection switching of the FET 72 based on the current value detected by the current detection unit 76. In the trunk line disconnection circuit 70 of the above-described embodiment, a voltage detection unit 77 is provided, but a current detection unit 76 is not provided. The control unit 79 performs the disconnection switching of the FET 72 based on the voltage value detected by the voltage detection unit 77. As in the above-described embodiments 4 and 5, the detection value used for abnormality detection in the trunk line disconnection circuit 70 can be only one of the current value and the voltage value. Similarly, the detection value used for abnormality detection in the power supply disconnection circuit 60 and the load disconnection circuit 80 can also be only one of the current value and the voltage value.

[0158] In the above embodiments, each cut-off circuit has an independent control unit. In contrast, the power distribution ECU 100 of variant 6 of the above embodiments includes an integrated control unit that integrates at least a portion of the multiple control units 69, 79, and 89. The integrated control unit controls the switching of the FETs of the multiple cut-off circuits on and off. Furthermore, in variant 7 of the above embodiments, an integrated control unit is provided independently of the control units of each cut-off circuit. The integrated control unit can cooperate with the control units of each cut-off circuit to coordinate the energization and switching of the multiple cut-off circuits. As in variants 6 and 7 above, the structure of the control unit of the power distribution ECU 100 can be appropriately modified.

[0159] Furthermore, the control unit and integrated control unit can be constructed from microcontrollers with a CPU (Central Processing Unit) as the main component, or from discrete circuits and other hardware circuits. The functions of the control unit and integrated control unit can also be provided by SoCs (System on Chip), ASICs (Application Specific Integrated Circuits), and FPGAs (Field-Programmable Gate Arrays).

[0160] In Variation 8 of the above-described embodiment, the preferred load 121 and the normal load 122 are not distinguished. Furthermore, in Variation 9 of the above-described embodiment, the preferred load 121 is connected only to one of the first load terminal 21 and the second load terminal 22. In Variation 10 of the above-described embodiment, the normal load 122 is electrically connected to both the first load terminal 21 and the second load terminal 22. Moreover, it is also possible to assume a fault in the load disconnection circuit 80, and the load portion 120 is electrically connected to either the two first load terminals 21 or the two second load terminals 22.

[0161] Vehicles equipped with the power distribution ECU 100 disclosed herein are not limited to POVs (Personally Owned Vehicles) under the premise of general private ownership. The power distribution ECU 100 can be installed in rental cars, manned taxis, carpooling vehicles, freight vehicles, and buses, etc. Furthermore, the power distribution ECU 100 can also be installed in driverless vehicles used for mobility services, construction machinery, agricultural machinery, railway vehicles, trams, and DMVs (Dual-Mode Vehicles), etc. In addition, the power distribution ECU 100 can also be installed as a mobile control device in ships, and electric aircraft such as drones and eVTOL.

[0162] In this disclosure, a record of "connection" can be directly connected to other elements, or it can be indirectly connected to other elements through an intermediate element. In addition, records of "adjacent" can be directly arranged with other elements without being separated by an intermediate element, or they can be indirectly arranged with an intermediate element in between.

[0163] The control unit and method described in this disclosure can also be implemented using a dedicated computer, which is configured as a processor programmed to perform one or more functions embodied in a computer program. Alternatively, the apparatus and method described in this disclosure can also be implemented using dedicated hardware logic circuitry. Alternatively, the apparatus and method described in this disclosure can also be implemented using one or more dedicated computers, which are configured as a combination of a processor executing a computer program and one or more hardware logic circuits. Furthermore, the computer program can also be stored as instructions executed by a computer on a computer-readable non-transferable tangible recording medium.

[0164] (The disclosure of technical ideas)

[0165] This specification discloses several technical ideas described in the following list of items. Some items are described in a multiple dependent form by selectively referencing an antecedent in a subsequent item. Furthermore, some items are described in a multiple dependent form by referring to another multiple dependent form. These items described in multiple dependent forms define several technical ideas.

[0166] (Technical Idea 1)

[0167] A vehicle control device is used in a vehicle to control the distribution of power supplied from multiple power sources (110) to multiple load units (120), wherein the device comprises:

[0168] Multiple power terminal sections (10) are electrically connected to the aforementioned power supply section;

[0169] Multiple load terminal sections (20) are electrically connected to the aforementioned load section;

[0170] The first power line section (31) is electrically connected to the first power terminal (11) included in the plurality of power terminal sections described above;

[0171] The second power line section (32) is electrically connected to the second power terminals (12) included in the plurality of power terminal sections described above; and

[0172] The trunk disconnect circuit (70) electrically connects the first power line section and the second power line section, and disconnects the electrical connection between the first power line section and the second power line section based on an abnormality in at least one of the current value and voltage value.

[0173] (Technical Idea 2)

[0174] According to the vehicle control device described in technical concept 1, wherein...

[0175] It also includes a power trunk section (40), which is electrically connected to both the first power cord section and the second power cord section.

[0176] The aforementioned trunk line disconnection circuit includes a switch section (71), which switches the power supply between the first power line section and the second power line section and disconnects the power supply.

[0177] (Technical Idea 3)

[0178] According to technical concept 1 or 2, in the vehicle control device,

[0179] The plurality of load terminal portions include a first load terminal (21) electrically connected to the first power line portion and a second load terminal (22) electrically connected to the second power line portion.

[0180] (Technical Idea 4)

[0181] According to the vehicle control device described in technical concept 3, wherein...

[0182] Regarding the aforementioned first power terminal,

[0183] When the aforementioned trunk disconnection circuit does not disconnect the electrical connection between the first power line and the second power line, it is electrically connected to the second load terminal.

[0184] With the aforementioned trunk disconnection circuit having severed the electrical connection between the first power line and the second power line, the electrical connection to the second load terminal is electrically disconnected.

[0185] Regarding the aforementioned second power supply terminal,

[0186] When the aforementioned trunk disconnection circuit does not disconnect the electrical connection between the first power line and the second power line, it is electrically connected to the first load terminal.

[0187] With the above-mentioned trunk disconnection circuit having disconnected the electrical connection between the first power line section and the second power line section, it is electrically disconnected from the first load terminal.

[0188] (Technical Idea 5)

[0189] The vehicle control device according to any one of technical concepts 1 to 4, wherein,

[0190] It also includes a power cut-off circuit (60), which is provided on at least one of the first power line portion and the second power line portion, and cuts off the electrical connection between the power terminal portion and the load terminal portion.

[0191] (Technical Idea 6)

[0192] According to the vehicle control device described in technical concept 5, wherein...

[0193] The aforementioned power cut-off circuit cuts off the electrical connection between the power supply terminal and the load terminal based on an abnormality in at least one of the current value and the voltage value caused by a ground fault related to the power supply unit.

[0194] (Technical Idea 7)

[0195] The vehicle control device according to any one of technical concepts 1 to 6, wherein,

[0196] The plurality of load terminal portions include a first load terminal (21) electrically connected to the first power line portion and a second load terminal (22) electrically connected to the second power line portion.

[0197] The aforementioned vehicle control device also includes:

[0198] The power trunk section (40) is electrically connected to both the first power cord section and the second power cord section.

[0199] The first load line section (51) electrically connects the first load terminal to a first section (41) in the power trunk section that is closer to the first power line section than the trunk disconnect circuit; and

[0200] The second load line section (52) electrically connects the second load terminal to the second section (42) of the power supply trunk section, which is closer to the second power supply line section than the trunk cutting circuit.

[0201] (Technical Idea 8)

[0202] According to the vehicle control device described in Technical Concept 7, wherein...

[0203] It also includes a load cut-off circuit (80), which is provided on at least one of the first load line portion and the second load line portion, and cuts off the electrical connection between the power supply trunk portion and the load terminal portion.

[0204] (Technical Idea 9)

[0205] According to the vehicle control device described in Technical Concept 8, wherein...

[0206] The aforementioned load disconnection circuit disconnects the electrical connection between the power supply terminal and the load terminal based on an abnormality in at least one of the current value and the voltage value caused by a ground fault related to the aforementioned load portion.

[0207] (Technical Idea 10)

[0208] According to any one of technical concepts 7 to 9, the vehicle control device wherein...

[0209] At least one of the first load terminals and at least one of the second load terminals are electrically connected as priority terminals (21a, 22a) to the same priority load (121) that is preferentially supplied with power compared to other normal loads (122) among the plurality of load units.

[0210] (Technical Idea 11)

[0211] According to the vehicle control device described in technical concept 10, wherein...

[0212] The aforementioned priority terminal is electrically connected to the aforementioned priority load that requires redundancy.

[0213] (Technical Idea 12)

[0214] According to the vehicle control device described in technical concept 10 or 11, wherein,

[0215] The first load terminal and the second load terminal, which are the aforementioned priority terminals, are adjacent to each other.

[0216] (Technical Idea 13)

[0217] The vehicle control device according to any one of technical concepts 1 to 12, wherein,

[0218] The plurality of load terminals include priority terminals (21a, 22a) electrically connected to priority loads (121) that are preferentially supplied with power among the plurality of load terminals, and ordinary terminals (21b, 22b) electrically connected to ordinary loads (122) other than the priority loads.

[0219] The aforementioned vehicle control device also includes:

[0220] The power trunk section (40) is electrically connected to both the first power cord section and the second power cord section.

[0221] The priority supply line section (51a, 52a) electrically connects the aforementioned priority terminal to the aforementioned power supply trunk section.

[0222] The normal supply line section (51b, 52b) electrically connects the above-mentioned normal terminals to the above-mentioned power main section; and

[0223] The load cut-off circuits (80d, 80e, 80h, 80i) cut off the electrical connection between the power supply trunk section implemented by the normal supply section and the normal terminal based on the current value or an abnormality of the current value in the priority supply line section.

[0224] (Technical Idea 14)

[0225] The vehicle control device according to any one of technical concepts 1 to 12, wherein,

[0226] Power is supplied from the main power source (111) to the first power terminal.

[0227] Power is supplied to the second power terminal from an auxiliary power source (112) whose power supply capacity is lower than that of the main power source.

[0228] (Technical Idea 15)

[0229] According to the vehicle control device described in technical concept 14, wherein...

[0230] The plurality of load terminals include a priority terminal (22a) electrically connected to a priority load (121) that is preferentially supplied with power among the plurality of load terminals, and a normal terminal (22b) electrically connected to a normal load (122) other than the priority load.

[0231] The aforementioned vehicle control device also includes:

[0232] The power trunk section (40) is electrically connected to both the first power cord section and the second power cord section.

[0233] The priority supply line section (52a) is electrically connected to the auxiliary section (42) in the power supply trunk section that is closer to the second power supply line section than the trunk cutting circuit.

[0234] The normal supply line section (52b) electrically connects the aforementioned normal terminals to the aforementioned auxiliary section of the aforementioned power main section; and

[0235] The load disconnection circuit (80h, 80i) disconnects the power supply trunk section from the normal terminal based on the current value or an abnormality in the current value in the priority supply line section when the trunk disconnection circuit has already disconnected the power supply trunk section.

[0236] (Technical Idea 16)

[0237] According to the vehicle control device described in technical concept 14 or 15, wherein...

[0238] The plurality of load terminals include a priority terminal (21a) electrically connected to a priority load (121) that is preferentially supplied with power among the plurality of load terminals, and a normal terminal (21b) electrically connected to a normal load (122) other than the priority load.

[0239] The aforementioned vehicle control device also includes:

[0240] The power trunk section (40) is electrically connected to both the first power cord section and the second power cord section.

[0241] The priority supply line section (51a) electrically connects the priority terminal to the main section (41) of the power supply trunk section that is closer to the first power supply line section than the trunk cutting circuit.

[0242] The normal supply line section (51b) electrically connects the aforementioned normal terminals to the aforementioned main section of the power supply trunk section; and

[0243] The load disconnect circuit (80d, 80e) disconnects the electrical connection between the power supply trunk section and the normal terminal, which is provided by the normal supply line section, based on the current value or an abnormality of the current value in the priority supply line section, when the trunk disconnect circuit cannot disconnect the power supply trunk section.

[0244] (Technical Idea 17)

[0245] The vehicle control device according to any one of technical concepts 1 to 16, wherein,

[0246] The aforementioned trunk line disconnection circuit includes an electrical fuse (EF).

[0247] (Technical Idea 18)

[0248] The vehicle control device according to any one of technical concepts 1 to 17, wherein,

[0249] The aforementioned trunk line disconnection circuit disconnects both the current flowing from the first power line to the second power line and the current flowing from the second power line to the first power line.

[0250] (Technical Idea 19)

[0251] According to the vehicle control device described in technical concept 5 or 6, wherein...

[0252] The aforementioned power cut-off circuit cuts off the reverse current, which is either the forward current flowing from the power terminal to the load terminal or the reverse current flowing from the load terminal to the power terminal.

[0253] (Technical Idea 20)

[0254] According to the vehicle control device described in technical concept 8 or 9, wherein...

[0255] The load disconnect circuit disconnects the positive current from the power supply trunk to the load terminal and the reverse current from the load terminal to the power supply trunk.

Claims

1. A vehicle control device, used in a vehicle, for controlling the distribution of power supplied from multiple power sources (110) to multiple load units (120), wherein, have: Multiple power terminal sections (10) are electrically connected to the aforementioned power supply section; Multiple load terminal sections (20) are electrically connected to the aforementioned load section; The first power line section (31) is electrically connected to the first power terminal (11) included in the plurality of power terminal sections described above; The second power line section (32) is electrically connected to the second power terminal (12) included in the plurality of power terminal sections described above; as well as The trunk disconnect circuit (70) electrically connects the first power line section and the second power line section, and disconnects the electrical connection between the first power line section and the second power line section based on an abnormality in at least one of the current value and voltage value.

2. The vehicle control device according to claim 1, wherein, It also includes a power trunk section (40), which is electrically connected to both the first power cord section and the second power cord section. The aforementioned trunk line disconnection circuit includes a switch section (71), which switches the power supply between the first power line section and the second power line section and disconnects the power supply.

3. The vehicle control device according to claim 1, wherein, The plurality of load terminal portions include a first load terminal (21) electrically connected to the first power line portion and a second load terminal (22) electrically connected to the second power line portion.

4. The vehicle control device according to claim 3, wherein, Regarding the aforementioned first power terminal, When the aforementioned trunk disconnection circuit does not disconnect the electrical connection between the first power line and the second power line, it is electrically connected to the second load terminal. With the aforementioned trunk disconnection circuit having severed the electrical connection between the first power line and the second power line, the electrical connection to the second load terminal is electrically disconnected. Regarding the aforementioned second power supply terminal, When the aforementioned trunk disconnection circuit does not disconnect the electrical connection between the first power line and the second power line, it is electrically connected to the first load terminal. With the above-mentioned trunk disconnection circuit having disconnected the electrical connection between the first power line section and the second power line section, it is electrically disconnected from the first load terminal.

5. The vehicle control device according to claim 1, wherein, It also includes a power cut-off circuit (60), which is provided on at least one of the first power line portion and the second power line portion, and cuts off the electrical connection between the power terminal portion and the load terminal portion.

6. The vehicle control device according to claim 5, wherein, The aforementioned power cut-off circuit cuts off the electrical connection between the power supply terminal and the load terminal based on an abnormality in at least one of the current value and the voltage value caused by a ground fault related to the power supply unit.

7. The vehicle control device according to claim 1, wherein, The plurality of load terminal portions include a first load terminal (21) electrically connected to the first power line portion and a second load terminal (22) electrically connected to the second power line portion. The aforementioned vehicle control device also includes: The power trunk section (40) is electrically connected to both the first power cord section and the second power cord section. The first load line section (51) electrically connects the first load terminal to a first interval (41) in the power trunk section that is closer to the first power line section than the trunk disconnect circuit; and The second load line section (52) electrically connects the second load terminal to the second section (42) of the power supply trunk section, which is closer to the second power supply line section than the trunk cutting circuit.

8. The vehicle control device according to claim 7, wherein, It also includes a load cut-off circuit (80), which is provided on at least one of the first load line portion and the second load line portion, and cuts off the electrical connection between the power supply trunk portion and the load terminal portion.

9. The vehicle control device according to claim 8, wherein, The aforementioned load disconnection circuit disconnects the electrical connection between the power supply terminal and the load terminal based on an abnormality in at least one of the current value and the voltage value caused by a ground fault related to the aforementioned load portion.

10. The vehicle control device according to claim 7, wherein, At least one of the first load terminals and at least one of the second load terminals are used as priority terminals (21a, 22a) and are electrically connected to the same priority load (121) that is given priority in power supply compared to other normal loads (122) among the plurality of load units.

11. The vehicle control device according to claim 10, wherein, The aforementioned priority terminal is electrically connected to the aforementioned priority load that requires redundancy.

12. The vehicle control device according to claim 10, wherein, The first load terminal and the second load terminal, which are the aforementioned priority terminals, are adjacent to each other.

13. The vehicle control device according to claim 1, wherein, The plurality of load terminals include priority terminals (21a, 22a) electrically connected to priority loads (121) that are preferentially supplied with power among the plurality of load terminals, and ordinary terminals (21b, 22b) electrically connected to ordinary loads (122) other than the priority loads. The aforementioned vehicle control device also includes: The power trunk section (40) is electrically connected to both the first power cord section and the second power cord section. The priority supply line section (51a, 52a) electrically connects the aforementioned priority terminal to the aforementioned power supply trunk section. The normal supply line section (51b, 52b) electrically connects the above-mentioned normal terminals to the above-mentioned power main section; and The load cut-off circuits (80d, 80e, 80h, 80i) cut off the electrical connection between the power supply trunk section implemented by the normal supply section and the normal terminal based on the current value or an abnormality of the current value in the priority supply line section.

14. The vehicle control device according to claim 1, wherein, Power is supplied from the main power source (111) to the first power terminal. Power is supplied to the second power terminal from an auxiliary power source (112) whose power supply capacity is lower than that of the main power source.

15. The vehicle control device according to claim 14, wherein, The plurality of load terminals include a priority terminal (22a) electrically connected to a priority load (121) that is preferentially supplied with power among the plurality of load terminals, and a normal terminal (22b) electrically connected to a normal load (122) other than the priority load. The aforementioned vehicle control device also includes: The power trunk section (40) is electrically connected to both the first power cord section and the second power cord section. The priority supply line section (52a) is electrically connected to the auxiliary section (42) in the power supply trunk section that is closer to the second power supply line section than the trunk cutting circuit. Normal supply line section (52b) electrically connects the above-mentioned normal terminal to the above-mentioned auxiliary section of the above-mentioned power supply trunk section. as well as The load disconnection circuit (80h, 80i) disconnects the power supply trunk section from the normal terminal based on the current value or an abnormality in the current value in the priority supply line section when the trunk disconnection circuit has already disconnected the power supply trunk section.

16. The vehicle control device according to claim 14, wherein, The plurality of load terminals include a priority terminal (21a) electrically connected to a priority load (121) that is preferentially supplied with power among the plurality of load terminals, and a normal terminal (21b) electrically connected to a normal load (122) other than the priority load. The aforementioned vehicle control device also includes: The power trunk section (40) is electrically connected to both the first power cord section and the second power cord section. The priority supply line section (51a) electrically connects the priority terminal to the main section (41) of the power supply trunk section that is closer to the first power supply line section than the trunk cutting circuit. The normal supply line section (51b) electrically connects the aforementioned normal terminals to the aforementioned main section of the power supply trunk section; and The load disconnect circuit (80d, 80e) disconnects the electrical connection between the power supply trunk section and the normal terminal, which is provided by the normal supply line section, based on the current value or an abnormality of the current value in the priority supply line section, when the trunk disconnect circuit cannot disconnect the power supply trunk section.

17. The vehicle control device according to claim 1, wherein, The aforementioned trunk line disconnection circuit includes an electrical fuse (EF).

18. The vehicle control device according to claim 1, wherein, The aforementioned trunk line disconnection circuit disconnects both the current flowing from the first power line to the second power line and the current flowing from the second power line to the first power line.

19. The vehicle control device according to claim 5, wherein, The aforementioned power cut-off circuit cuts off the reverse current, which is either the forward current flowing from the power terminal to the load terminal or the reverse current flowing from the load terminal to the power terminal.

20. The vehicle control device according to claim 8, wherein, The load disconnect circuit disconnects the positive current from the power supply trunk to the load terminal and the reverse current from the load terminal to the power supply trunk.

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