WO2022270279A1 - 給電制御装置、給電制御方法、及びプログラム - Google Patents
給電制御装置、給電制御方法、及びプログラム Download PDFInfo
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- WO2022270279A1 WO2022270279A1 PCT/JP2022/022707 JP2022022707W WO2022270279A1 WO 2022270279 A1 WO2022270279 A1 WO 2022270279A1 JP 2022022707 W JP2022022707 W JP 2022022707W WO 2022270279 A1 WO2022270279 A1 WO 2022270279A1
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- switch
- power supply
- state
- control device
- control
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- 238000000034 method Methods 0.000 title claims description 19
- 230000005856 abnormality Effects 0.000 claims abstract description 81
- 238000001514 detection method Methods 0.000 claims abstract description 52
- 239000000758 substrate Substances 0.000 claims description 33
- 239000004065 semiconductor Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
Definitions
- the present disclosure relates to a power supply control device, a power supply control method, and a program.
- Patent Document 1 discloses a power supply control device capable of suppressing temperature rise of a semiconductor switch when a half-on failure occurs.
- the power supply control device disclosed in Patent Literature 1 has a function of determining whether current is flowing when a semiconductor switch is instructed to be turned off.
- the present disclosure provides a technique for reducing the effective value of the current flowing through a switch when an abnormality occurs in which the switch is maintained in an energized state while an off signal is being applied.
- a power supply control device which is one of the present disclosure, A power supply control device mounted on a vehicle, a first switch provided between the first conductive path and the second conductive path, switched to an ON state in response to application of an ON signal, and switched to an OFF state in response to application of an OFF signal; a second switch provided in parallel with the first switch between the first conductive path and the second conductive path; an abnormality detection unit that detects an abnormality in which the first switch is maintained in an energized state when the off signal is applied to the first switch; a control unit that controls the first switch and the second switch; has the on-resistance of the first switch is smaller than the on-resistance of the second switch; The control unit performs first control for turning on the first switch, and on/off control for alternately switching the second switch between an on state and an off state when the abnormality is detected by the abnormality detection unit. ,I do.
- a power supply control method which is one of the present disclosure, A power supply control method for controlling power supply in a vehicle using a power supply control device, The power supply control device, a first switch provided between the first conductive path and the second conductive path, switched to an ON state in response to application of an ON signal, and switched to an OFF state in response to application of an OFF signal; a second switch provided in parallel with the first switch between the first conductive path and the second conductive path; an abnormality detection unit that detects an abnormality in which the first switch is maintained in an energized state when the off signal is applied to the first switch; a control unit that controls the first switch and the second switch; has the on-resistance of the first switch is smaller than the on-resistance of the second switch; a first control in which the control unit turns on the first switch; and an on/off control in which the second switch is alternately turned on and off when the abnormality is detected by the abnormality detection unit. ,I do.
- a program which is one of the present disclosure, A program for causing a power supply control device mounted in a vehicle to perform power supply control, The power supply control device, a first switch provided between the first conductive path and the second conductive path, switched to an ON state in response to application of an ON signal, and switched to an OFF state in response to application of an OFF signal; a second switch provided in parallel with the first switch between the first conductive path and the second conductive path; an abnormality detection unit that detects an abnormality in which the first switch is maintained in an energized state when the off signal is applied to the first switch; a control unit that controls the first switch and the second switch; has the on-resistance of the first switch is smaller than the on-resistance of the second switch;
- the program is causing the control unit to perform a first control to turn on the first switch; causing the control unit to perform on/off control for alternately switching the second switch between an on state and an off state when the abnormality is detected by the abnormality detection unit; including.
- the technology according to the present disclosure tends to reduce the effective value of the current flowing through the switch when an abnormality occurs in which the switch is maintained in an energized state while an off signal is being supplied.
- FIG. 1 is a block diagram schematically illustrating an in-vehicle system including a power supply control device according to the first embodiment.
- FIG. 2 is an explanatory diagram that schematically illustrates a vehicle that includes the power supply control device of the first embodiment.
- FIG. 3 is a plan view for briefly explaining the mounting structure of the power supply control device of the first embodiment on a substrate.
- FIG. 4 is a front view for briefly explaining a mounting structure of the power supply control device of the first embodiment on a substrate.
- FIG. 5 is a flowchart illustrating the flow of power supply control performed by the power supply control device of the first embodiment.
- a power supply control device mounted on a vehicle, a first switch provided between the first conductive path and the second conductive path, switched to an ON state in response to application of an ON signal, and switched to an OFF state in response to application of an OFF signal; a second switch provided in parallel with the first switch between the first conductive path and the second conductive path; an abnormality detection unit that detects an abnormality in which the first switch is maintained in an energized state when the off signal is applied to the first switch; a control unit that controls the first switch and the second switch; has the on-resistance of the first switch is smaller than the on-resistance of the second switch; The control unit performs first control for turning on the first switch, and on/off control for alternately switching the second switch between an on state and an off state when the abnormality is detected by the abnormality detection unit. , a power supply controller.
- the power supply control device of [1] above performs the first control to turn on the first switch, thereby allowing current to flow through the first switch having a relatively low on-resistance.
- the power supply control device performs on/off control to alternately switch the second switch between an on state and an off state, so that the first conductive path and the second conductive path are switched.
- the current flowing between the paths can be distributed between the first switch and the second switch. Therefore, the effective current of the first switch is suppressed, and heat generation due to increased loss is suppressed.
- the power supply control device of [2] has the following features in the power supply control device of [1] above.
- the vehicle is configured to switch between a drivable state and a non-drivable state, and when the on/off control of the second switch is performed at least when the vehicle is in the drivable state, an abnormality is notified to the occupants in the vehicle. It has a notification unit to perform.
- the power supply control device of [2] above can notify the occupants in the vehicle to that effect, so that the occupants in the vehicle can grasp the situation and deal with it.
- the power supply control device of [3] has the following features in the power supply control device of [1] or [2] above.
- the vehicle is configured to switch between a drivable state and an undrivable state.
- the control unit continues the on-off control even after switching to the travel-impossible state.
- the power supply control device of [3] above can prevent excessive current from continuing to flow through the abnormal first switch after switching to the non-running state.
- the power supply control device of [4] has the following features in the power supply control device of [3] above.
- the control unit supplies power to a predetermined load from the power storage unit, which is a power supply source for supplying current to the first switch and the second switch. I do.
- the power supply control device of [4] above is a power supply source for supplying current to the first switch and the second switch while continuing the on/off control after switching to the non-running state when the abnormality is detected.
- the power supply control device of [5] has the following features in the power supply control device according to any one of [1] to [4] above.
- the power supply control device of [5] has a resistance detection unit that detects the resistance of the first switch when the first switch is in an energized state.
- the control unit outputs a PWM (Pulse Width Modulation) signal, performs the on/off control so as to control the on/off of the second switch by the PWM signal, and based on the resistance detected by the resistance detection unit Sets the duty of the PWM signal.
- PWM Pulse Width Modulation
- the power supply control device of [5] above can perform PWM control in accordance with the actual resistance of the first switch when performing the on/off control according to the abnormality.
- the power supply control device of [6] has the following features in the power supply control device according to any one of [1] to [5] above.
- the first switch and the second switch are mounted on a common substrate, the first switch is mounted on one side of the substrate, and the second switch is mounted on the other side of the substrate.
- the first switch and the second switch can be arranged separately on the surfaces opposite to each other, it is possible to further suppress the concentration of heat when the abnormality occurs. .
- the power supply control device of [7] has the following features in the power supply control device of any one of [1] to [6] above.
- the first switch and the second switch are mounted on a common substrate.
- the first switch is mounted near a first end provided on one side of the substrate in a predetermined direction.
- the second switch is mounted on the substrate near the second end opposite to the one side in the predetermined direction.
- the first switch and the second switch can be arranged on the opposite end side apart from each other, it is possible to further suppress the concentration of heat when the abnormality occurs. can be done.
- a power supply control method for controlling power supply in a vehicle using a power supply control device The power supply control device, a first switch provided between the first conductive path and the second conductive path, switched to an ON state in response to application of an ON signal, and switched to an OFF state in response to application of an OFF signal; a second switch provided in parallel with the first switch between the first conductive path and the second conductive path; an abnormality detection unit that detects an abnormality in which the first switch is maintained in an energized state when the off signal is applied to the first switch; a control unit that controls the first switch and the second switch; has the on-resistance of the first switch is smaller than the on-resistance of the second switch; a first control in which the control unit turns on the first switch; and an on/off control in which the second switch is alternately turned on and off when the abnormality is detected by the abnormality detection unit. , a power supply control method.
- the above [8] power supply control method has the same effect as the above [1] power supply control device.
- a program for causing a power supply control device mounted in a vehicle to perform power supply control The power supply control device, a first switch provided between the first conductive path and the second conductive path, switched to an ON state in response to application of an ON signal, and switched to an OFF state in response to application of an OFF signal; a second switch provided in parallel with the first switch between the first conductive path and the second conductive path; an abnormality detection unit that detects an abnormality in which the first switch is maintained in an energized state when the off signal is applied to the first switch; a control unit that controls the first switch and the second switch; has the on-resistance of the first switch is smaller than the on-resistance of the second switch;
- the program is causing the control unit to perform a first control to turn on the first switch; a step of causing the control unit to perform ON/OFF control for alternately switching the second switch between an ON state and an OFF state when the abnormality is detected by the abnormality detection unit;
- the program of [9] above has the same effect as the power supply control device of [1] above.
- the vehicle 190 is equipped with not only the load 106, the power supply unit 102, and the power supply control device 1, but also many other components.
- the vehicle-mounted system 100 is a system mounted on a vehicle 190 as shown in FIG. In the in-vehicle system 100 , the power supply system 101 controls power supplied to the load 106 .
- the load 106 is an electrical component that can operate by being supplied with power. Various components or devices may be applied to the load 106 .
- the load 106 illustrated in FIG. 1, for example, has a resistive component.
- the load 106 may have an inductance component and a capacitive component.
- the power supply system 101 mainly includes a power supply section 102, a power path 104, a power supply control device 1, and the like.
- the power supply system 101 is a system that supplies power to the load 106 based on the power supplied from the power supply unit 102 .
- the power supply unit 102 is an electricity storage unit that serves as a main power supply for supplying power to the load 106 .
- the power supply unit 102 is configured as an in-vehicle battery such as a lead battery, for example.
- the power supply unit 102 has, for example, a terminal on the high potential side electrically connected to the power path 104 and applies a constant voltage to the power path 104 .
- the voltage that power supply 102 applies to power path 104 is also referred to as the +B voltage.
- the power supply unit 102 may include a power supply circuit.
- the power supply unit 102 may be configured such that the power supply circuit applies a constant voltage to the power path 104 based on the power from the power storage unit.
- a voltage is a ground-based voltage.
- the power path 104 is electrically connected to the high-potential side terminal of the power supply section 102 directly or via another conductive path, and is configured to receive a constant DC voltage from the power supply section 102 .
- the power path 104 is a path for transmitting power from the power supply unit 102 .
- the power path 104 may be provided with components such as fuses and relays.
- a power supply control device 1 is a device mounted on a vehicle 190 as shown in FIG.
- the power supply control device 1 mainly includes a first switch 11, a second switch 12, a third switch 13, a first conductive path 21, a second conductive path 22, a control section 30, a detection section 40, a notification section 60, and the like. .
- the first conductive path 21 is a conductive path electrically connected to the power path 104 .
- the first conductive path 21 is short-circuited to the power path 104, and the first conductive path 21 and the power path 104 are at the same potential at a predetermined potential (for example, the potential of the high potential side terminal of the power supply section 102). be done.
- the first conductive path 21 may be composed only of wiring having a conductor, or may be provided with a fuse or the like.
- the second conductive path 22 is a conductive path forming a path for current to flow to the load 106 .
- the second conducting path 22 has the same potential or substantially the same potential as the other end of the first switch 11 and the other end of the second switch 12 .
- the second conductive path 22 is electrically connected to one end of the load 106 .
- the first conductive path 21 may be composed only of wiring having a conductor, or may be provided with a fuse or the like.
- the first switch 11 and the second switch 12 constitute the switch device 10.
- current flows from the power supply unit 102 to the load 106 when at least one of the first switch 11 and the second switch 12 is in the ON state.
- the first switch 11 is provided between the first conducting path 21 and the second conducting path 22 .
- the first switch 11 is switched to an ON state in response to an ON signal (for example, a high-level voltage signal) applied to an input terminal (specifically, a gate terminal), and an OFF signal (for example, a low-level voltage signal) to an input terminal. signal) is applied.
- an ON signal for example, a high-level voltage signal
- an input terminal specifically, a gate terminal
- an OFF signal for example, a low-level voltage signal
- the other terminal (specifically, the source terminal) of the first switch 11 is electrically connected to the second conductive path 22 .
- one terminal of the first switch 11 is short-circuited to the first conductive path 21 and the power path 104 and set to the same potential as the first conductive path 21 and the power path 104 .
- the ON resistance of the first switch 11 is smaller than the ON resistance of the second switch 12 .
- the second switch 12 is provided between the first conducting path 21 and the second conducting path 22 .
- the second switch 12 is provided in parallel with the first switch 11 .
- the second switch 12 is switched to an ON state in response to an ON signal (for example, a high-level voltage signal) being applied to the input terminal (specifically, the gate terminal). is switched to the OFF state when an OFF signal (for example, a low-level voltage signal) is given to .
- an ON signal for example, a high-level voltage signal
- the input terminal specifically, the gate terminal
- an OFF signal for example, a low-level voltage signal
- one terminal of the second switch 12 is short-circuited to the first conductive path 21 and the power path 104 and set to the same potential as the first conductive path 21 and the power path 104 .
- the ON resistance of the first switch 11 when the ON signal is given to the first switch 11 is is smaller than the ON resistance of the second switch 12 when .
- the normal state of the first switch 11 is that the first switch 11 is turned on when an on signal is given to the first switch 11, and when an off signal is given to the first switch 11, This is a state in which the first switch 11 is turned off.
- the normal state of the second switch 12 is that the second switch 12 is turned on when an on signal is given to the second switch 12, and when an off signal is given to the second switch 12, This is a state in which the second switch 12 is turned off.
- the third switch 13 is provided between the power path 104 and ground.
- the third switch 13 is switched to an ON state in response to an ON signal (for example, a high-level voltage signal) being applied to the input terminal (specifically, the gate terminal), and the input terminal (specifically, the gate terminal) is switched to the ON state. is switched to the OFF state when an OFF signal (for example, a low-level voltage signal) is given to .
- an ON signal for example, a high-level voltage signal
- the input terminal specifically, the gate terminal
- an OFF signal for example, a low-level voltage signal
- the first switch 11, the second switch 12, and the third switch 13 are all composed of semiconductor switches such as FETs (Field Effect Transistors) and IGBTs (Insulated Gate Bipolar Transistors).
- FETs Field Effect Transistors
- IGBTs Insulated Gate Bipolar Transistors
- the first switch 11, the second switch 12, and the third switch 13 are all composed of N-channel FETs.
- the control unit 30 is a device that can perform various controls. For example, the control unit 30 controls on/off of the first switch 11, the second switch 12, and the third switch 13, respectively.
- the control unit 30 mainly has a control device 32 and drive circuits 34 , 35 and 36 .
- the control device 32 is configured by a control device such as an MCU (Micro Controller Unit), for example.
- the control device 32 is a device capable of performing various information processing and calculations.
- the control device 32 corresponds to an example of an abnormality detection section.
- the control unit 30 detects an abnormality in which the first switch 11 is maintained in the energized state while the off signal is being supplied to the first switch 11 .
- the drive circuit 34 applies a high level signal of the first voltage (second switch 12) is applied.
- the drive circuit 34 applies a low level signal of a second potential lower than the first voltage to the input terminal of the second switch 12 (turns off the second switch 12) while the low level signal is being supplied from the control device 32. off signal) of the voltage to operate.
- the drive circuit 35 applies a high-level signal of the first voltage (first switch 11) to the input terminal (specifically, the gate terminal) of the first switch 11 while the high-level signal is being supplied from the control device 32 . 11) is applied.
- the drive circuit 35 applies a low level signal of a second potential lower than the first voltage to the input terminal of the first switch 11 (turns off the first switch 11) while the low level signal is being supplied from the control device 32 off signal) of the voltage to operate.
- the driving circuit 36 applies a high-level signal of the first voltage to the input terminal (specifically, the gate terminal) of the third switch 13 while the high-level signal is being supplied from the control device 32 . 13) is applied.
- the driving circuit 36 applies a low level signal of a second potential lower than the first voltage to the input terminal of the third switch 13 (turning off the third switch 13) while the low level signal is being supplied from the control device 32. off signal) of the voltage to operate.
- the detection unit 40 includes a detection circuit 42 functioning as a voltage detection unit and a current sensor 44 functioning as a current detection unit.
- the detection circuit 42 can detect the potential of the conductive path 23 A between the first switch 11 and the first conductive path 21 . Further, detection circuit 42 may detect the potential of conductive path 23B between first switch 11 and second conductive path 22 .
- the current sensor 44 is a current detection circuit that detects the current flowing through the first switch 11 (specifically, the current flowing through the conducting path 23B). In the representative example of FIG. 1, detection circuit 42 provides controller 32 with an analog voltage value that can identify the value of the voltage on conductive path 23A (ie, the value of the voltage at one end of first switch 11).
- the detection circuit 42 provides the controller 32 with an analog voltage value that can identify the voltage value of the conductive path 23B (that is, the voltage value at the other end of the first switch 11).
- Current sensor 44 provides controller 32 with an analog voltage value that can identify the value of the current flowing through first switch 11, conductive paths 23A, 23B.
- the third switch 13 is controlled by the control unit 30 and functions as a switching unit that switches between a state in which power supply to the load 108 is permitted and a state in which power supply is stopped.
- the third switch 13 is in the ON state, power is supplied so that a current based on the power from the power supply unit 102 flows to the load 108 side via the third switch 13 .
- the third switch 13 is in the OFF state, the operation of supplying power to the load 108 via the third switch 13 is stopped. Note that the configuration for supplying power to the load 108 shown in FIG.
- the notification unit 60 has, for example, a display unit such as a display lamp and an image display device, and an audio output unit such as a speaker and buzzer.
- the notification unit 60 can output sound and display information (for example, image information including character information and graphic information).
- the notification operation of the notification unit 60 is controlled by the control device 32 .
- the power supply control device 1 includes various components shown in FIG. , detection unit 40, etc.) are mounted on a common substrate 80 (FIGS. 3 and 4). 3 and 4, illustration of parts other than the first switch 11, the second switch 12, and the board 80 is omitted.
- the first switch 11 is mounted on one surface 81 of the board 80 .
- a second switch 12 is mounted on the other surface 82 of the substrate 80 .
- One surface 81 is a plate surface on one side in the thickness direction of the substrate 80 .
- the other surface 82 is a plate surface on the other side in the thickness direction of the substrate 80 .
- Various arrangements can be adopted for the arrangement of components other than the first switch 11 and the second switch 12 on the substrate 80 .
- the first switch 11 is mounted on the substrate 80 near the end 80A provided on one side in the first direction.
- the second switch 12 is mounted on the substrate 80 near the end portion 80B on the other side (the side opposite to the one side) in the first direction.
- “Arranged near the end portion 80A on one side in the first direction” means being arranged in a region closer to the end portion 80A than the center position C1 of the substrate 80 in the first direction.
- “Arranged near the end portion 80B on the other side in the first direction” means being arranged in a region closer to the end portion 80B than the center position C1 of the substrate 80 in the first direction.
- the first direction is a predetermined direction perpendicular to the thickness direction of the substrate 80 .
- the longitudinal direction of the plate surface of the substrate 80 is the first direction.
- first switch 11 is mounted on the substrate 80 near the end 80C provided on one side in the second direction.
- the second switch 12 is mounted on the substrate 80 on the other side in the second direction (the side opposite to the one side) near the end portion 80D.
- “Arranged near the end 80C on one side in the second direction” means arranged in a region closer to the end 80C than the center position C2 of the substrate 80 in the second direction.
- “Arranged near the end portion 80D on the other side in the second direction” means being arranged in a region closer to the end portion 80D than the center position C2 of the substrate 80 in the second direction.
- the second direction is a direction orthogonal to the thickness direction of the substrate 80 and the first direction. In the example of FIG. 3, the lateral direction of the plate surface of the substrate 80 is the second direction.
- Power Supply Control The following description relates to power supply control performed by the power supply control device 1 .
- the power supply control shown in FIG. 5 is executed by a program stored in a storage unit provided inside or outside the control device 32 .
- the control unit 30 (specifically, the control device 32) executes the control shown in FIG. 5 according to this program.
- the above program causes the control unit 30 to execute the control shown in FIG. 5 when a predetermined start condition is satisfied in the vehicle 190 .
- the "starting condition being satisfied” may be, for example, that a starting condition for starting the vehicle is satisfied (for example, a starting switch such as an ignition switch is switched from an off state to an on state). It may be that power is started to be supplied to the control device 1, or other conditions.
- step S1 determines in step S1 whether or not a condition for supplying power to the load 106 (load supply condition) is satisfied, and supplies the load. If it is determined that the condition is not satisfied, the process proceeds to step S3 while continuing the initial state (the state in which both the first switch 11 and the second switch 12 are kept in the OFF state).
- control unit 30 determines that the load supply condition is satisfied in step S1, it starts or continues the first control in step S2.
- the control unit 30 continues the first control if the first control has already been executed at the time of performing step S2, and continues the first control if the first control has not been executed at the time of performing step S2. to start.
- the first control is control to turn on the first switch 11 , specifically, control to turn on the first switch 11 and turn off the second switch 12 .
- the first control may be control to keep the first switch 11 in the on state, or control to turn on/off the first switch 11 (for example, control to turn on/off at a set duty).
- the control unit 30 determines whether or not an abnormality of the first switch 11 has been detected in step S3.
- the "abnormality” here is “abnormality in which the first switch 11 is maintained in an energized state when an off signal is given to the first switch 11".
- the above “abnormality” detection may be performed at the time of step S3, or may be performed before step S3. For example, when the voltage of the conductive path 23B is equal to or higher than a predetermined value while the initial state is maintained, the control unit 30 determines that the "abnormality” has occurred (detects the abnormality). may Alternatively, the control unit 30 sets a detection period during which both the first switch 11 and the second switch 12 are turned off during the first control. First, it may be determined that the above-mentioned "abnormality" has occurred (abnormality detection).
- the control unit 30 corresponds to an example of an abnormality detection unit.
- step S3 determines in step S3 that the "abnormality" of the first switch 11 is not detected.
- the process returns to step S1.
- step S2 the process proceeds to step S2 to continue the first control. That is, the control unit 30 continues the first control when the load supply condition is being satisfied and the "abnormality" is not detected. Further, the control unit 30 continues the initial state when the load supply condition is not satisfied and when the "abnormality" is not detected.
- the control unit 30 determines in step S3 that the "abnormality" of the first switch 11 is detected, it starts the second control in step S4.
- the second control is on/off control that alternately switches the second switch 12 between an on state and an off state.
- the second control is a control to apply a PWM signal having a duty set to the input portion (gate terminal) of the second switch 12.
- the PWM signal The second switch 12 is turned on during the period of the high level signal (on signal) of the PWM signal, and turned off during the period of the low level signal (off signal) of the PWM signal.
- the second switch 12 When the control unit 30 performs the second control (on/off control), the second switch 12 may be turned on/off with a predetermined duty, or the following control may be employed.
- the power supply control device 1 has a resistance detection unit that detects the resistance of the first switch 11 when the first switch 11 is in the energized state.
- step S4 when the second control (on/off control) is started in step S4, the control unit 30 outputs a PWM signal, performs on/off control so as to control on/off of the second switch 12 by the PWM signal, and detects the resistance.
- the duty of the PWM signal may be set based on the resistance Ron detected by the section.
- the control unit 30 detects "correspondence information such as a table or an arithmetic expression that predetermines the correspondence between the on-resistance and the duty of the PWM signal" ( That is, when the on-resistance is specified, the second switch 12 is operated with the duty specified by the correspondence information as the duty corresponding to the resistance Ron based on the information that can determine the duty corresponding to the specified on-resistance. Control may be performed to turn it on and off. Various methods can be adopted for determining the correspondence information.
- a vehicle 190 equipped with the power supply control device 1 is configured to switch between a drivable state and an undrivable state.
- the drivable state is, for example, a state in which the ignition switch is turned on.
- the state in which the power switch for starting the vehicle 190 is in the ON state can be the state in which the vehicle 190 can be driven.
- the non-driving state is, for example, a state in which the ignition switch is turned off.
- the state in which the power switch for starting the vehicle 190 is in the OFF state can be the state in which the vehicle cannot be driven.
- the notification unit 60 may notify the occupants in the vehicle of the abnormality when performing the above-described on/off control.
- This notification of the abnormality may be performed by displaying a lamp indicating the abnormality of the first switch 11, emitting a sound indicating the abnormality of the first switch 11, or displaying a message or code indicating the abnormality of the first switch 11. or audio output.
- the on/off control is continued even after switching to the travel-impossible state.
- the control unit 30 turns on the third switch 13 (a state in which current can be supplied to the load 108 via the third switch 13). to control. Therefore, when the "abnormality" is detected and the vehicle becomes unable to travel, the second control (ON/OFF control) and power supply to the load 108 based on the power from the power supply unit 102 can be performed in parallel. can.
- control unit 30 performs ON/OFF control to alternately switch the second switch 12 between the ON state and the OFF state when the abnormality detection unit detects the "abnormality".
- control unit 30 performs first control to turn on the first switch 11, and when an abnormality is detected by the abnormality detection unit, the second switch 12 is turned on. ON/OFF control is performed to alternately switch between a state and an OFF state.
- step S3, S4 the program for causing the control unit 30 to perform the control shown in FIG. and a second step (steps S3, S4) and.
- the power supply control device 1, the power supply method using the power supply control device 1, and the program used in the power supply control device 1 described above have an abnormality in which the switch is maintained in an energized state when an off signal is given. When this occurs, it is easy to quickly suppress the current from continuing to flow through the switch. Specifically, the power supply control device 1 performs the first control to turn on the first switch 11, thereby allowing current to flow through the first switch 11 having a relatively low on-resistance. When an abnormality is detected by the abnormality detection unit, the power supply control device 1 performs on/off control to alternately switch the second switch 12 between an on state and an off state. The current flowing between the two conductive paths 22 can be distributed between the first switch 11 and the second switch 12 . Therefore, the effective current of the first switch 11 is suppressed, and heat generation due to an increase in loss is suppressed.
- the notification unit 60 can be used to notify the occupants in the vehicle to that effect. can.
- the power supply control device 1 can prevent excessive current from continuing to flow through the abnormal first switch 11 after the vehicle is switched to the non-running state.
- the power supply control device 1 has a power supply unit that is a power supply source for supplying current to the first switch 11 and the second switch 12 while continuing the on/off control after switching to the non-running state.
- a power supply unit that is a power supply source for supplying current to the first switch 11 and the second switch 12 while continuing the on/off control after switching to the non-running state.
- the load 108 By supplying power from 102 (power storage unit) to the load 108, not only is the current flowing through the first switch 11 suppressed, but also the electric power based on the power supply unit 102 is forcibly consumed, thereby shortening the continuation period of energization. can be planned.
- FIG. 1 exemplifies a configuration that can promote discharge of the power supply unit 102 by supplying power to the load 108 after switching to the non-running state when the above abnormality is detected. Discharge of the power supply unit 102 may be accelerated by a circuit.
- the power supply control device 1 can perform PWM control according to the actual resistance of the first switch 11 when performing the on/off control according to the abnormality.
- the first switch 11 and the second switch 12 can be arranged separately on opposite surfaces, so that heat concentration can be further suppressed when the abnormality occurs.
- the first switch 11 and the second switch 12 can be arranged on the opposite end side apart from each other, it is possible to further suppress the concentration of heat when the abnormality occurs.
- the first conductive path 21 and the second conductive path 22 are provided inside the power supply control device 1, but the first conductive path 21 and the second conductive path 22 are provided outside the power supply control device 1. may be provided in
- the current sensor 44 is provided in the embodiment described above, the current sensor 44 may not be provided.
- the detection circuit 42 is configured to detect the voltage of both the conductive paths 23A and 23B, but may be configured to detect only the voltage of the conductive path 23B.
- Power supply control device 10 Switch device 11: First switch 12: Second switch 13: Third switch 21: First conducting path 22: Second conducting path 23A: Conducting path 23B: Conducting path 30: Control unit (abnormal detector, resistance detector) 32: control device 34: drive circuit 35: drive circuit 36: drive circuit 40: detection section 42: detection circuit (resistance detection section) 44: Current sensor (resistance detector) 60: notification unit 80: substrate 80A: end 80B: end 80C: end 80D: end 81: one side 82: other side 100: vehicle-mounted system 101: power supply system 102: power supply unit 104: power line 106: load 108: load (predetermined load) 190: Vehicle C1: Center position C2: Center position
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Abstract
Description
車両に搭載される給電制御装置であって、
第1導電路と第2導電路との間に設けられ、オン信号が与えられることに応じてオン状態に切り替わり、オフ信号が与えられることに応じてオフ状態に切り替わる第1スイッチと、
前記第1導電路と前記第2導電路との間において前記第1スイッチに対して並列に設けられる第2スイッチと、
前記第1スイッチに対して前記オフ信号が与えられているときに前記第1スイッチが通電状態で維持される異常を検出する異常検出部と、
前記第1スイッチ及び前記第2スイッチを制御する制御部と、
を有し、
前記第1スイッチのオン抵抗は、前記第2スイッチのオン抵抗よりも小さく、
前記制御部は、前記第1スイッチをオン状態とする第1制御と、前記異常検出部によって前記異常が検出された場合に前記第2スイッチをオン状態とオフ状態とに交互に切り替えるオンオフ制御と、を行う。
給電制御装置を用い、車両内での給電を制御する給電制御方法であって、
前記給電制御装置は、
第1導電路と第2導電路との間に設けられ、オン信号が与えられることに応じてオン状態に切り替わり、オフ信号が与えられることに応じてオフ状態に切り替わる第1スイッチと、
前記第1導電路と前記第2導電路との間において前記第1スイッチに対して並列に設けられる第2スイッチと、
前記第1スイッチに対して前記オフ信号が与えられているときに前記第1スイッチが通電状態で維持される異常を検出する異常検出部と、
前記第1スイッチ及び前記第2スイッチを制御する制御部と、
を有し、
前記第1スイッチのオン抵抗は、前記第2スイッチのオン抵抗よりも小さく、
前記制御部が、前記第1スイッチをオン状態とする第1制御と、前記異常検出部によって前記異常が検出された場合に前記第2スイッチをオン状態とオフ状態とに交互に切り替えるオンオフ制御と、を行う。
車両内に搭載される給電制御装置に給電制御を行わせるプログラムであって、
前記給電制御装置は、
第1導電路と第2導電路との間に設けられ、オン信号が与えられることに応じてオン状態に切り替わり、オフ信号が与えられることに応じてオフ状態に切り替わる第1スイッチと、
前記第1導電路と前記第2導電路との間において前記第1スイッチに対して並列に設けられる第2スイッチと、
前記第1スイッチに対して前記オフ信号が与えられているときに前記第1スイッチが通電状態で維持される異常を検出する異常検出部と、
前記第1スイッチ及び前記第2スイッチを制御する制御部と、
を有し、
前記第1スイッチのオン抵抗は、前記第2スイッチのオン抵抗よりも小さく、
当該プログラムは、
前記第1スイッチをオン状態とする第1制御を前記制御部に行わせるステップと、
前記異常検出部によって前記異常が検出された場合に前記第2スイッチをオン状態とオフ状態とに交互に切り替えるオンオフ制御を前記制御部に行わせるステップと、
を含む。
第1導電路と第2導電路との間に設けられ、オン信号が与えられることに応じてオン状態に切り替わり、オフ信号が与えられることに応じてオフ状態に切り替わる第1スイッチと、
前記第1導電路と前記第2導電路との間において前記第1スイッチに対して並列に設けられる第2スイッチと、
前記第1スイッチに対して前記オフ信号が与えられているときに前記第1スイッチが通電状態で維持される異常を検出する異常検出部と、
前記第1スイッチ及び前記第2スイッチを制御する制御部と、
を有し、
前記第1スイッチのオン抵抗は、前記第2スイッチのオン抵抗よりも小さく、
前記制御部は、前記第1スイッチをオン状態とする第1制御と、前記異常検出部によって前記異常が検出された場合に前記第2スイッチをオン状態とオフ状態とに交互に切り替えるオンオフ制御と、を行う
給電制御装置。
前記給電制御装置は、
第1導電路と第2導電路との間に設けられ、オン信号が与えられることに応じてオン状態に切り替わり、オフ信号が与えられることに応じてオフ状態に切り替わる第1スイッチと、
前記第1導電路と前記第2導電路との間において前記第1スイッチに対して並列に設けられる第2スイッチと、
前記第1スイッチに対して前記オフ信号が与えられているときに前記第1スイッチが通電状態で維持される異常を検出する異常検出部と、
前記第1スイッチ及び前記第2スイッチを制御する制御部と、
を有し、
前記第1スイッチのオン抵抗は、前記第2スイッチのオン抵抗よりも小さく、
前記制御部が、前記第1スイッチをオン状態とする第1制御と、前記異常検出部によって前記異常が検出された場合に前記第2スイッチをオン状態とオフ状態とに交互に切り替えるオンオフ制御と、を行う
給電制御方法。
前記給電制御装置は、
第1導電路と第2導電路との間に設けられ、オン信号が与えられることに応じてオン状態に切り替わり、オフ信号が与えられることに応じてオフ状態に切り替わる第1スイッチと、
前記第1導電路と前記第2導電路との間において前記第1スイッチに対して並列に設けられる第2スイッチと、
前記第1スイッチに対して前記オフ信号が与えられているときに前記第1スイッチが通電状態で維持される異常を検出する異常検出部と、
前記第1スイッチ及び前記第2スイッチを制御する制御部と、
を有し、
前記第1スイッチのオン抵抗は、前記第2スイッチのオン抵抗よりも小さく、
当該プログラムは、
前記第1スイッチをオン状態とする第1制御を前記制御部に行わせるステップと、
前記異常検出部によって前記異常が検出された場合に、前記第2スイッチをオン状態とオフ状態とに交互に切り替えるオンオフ制御を前記制御部に行わせるステップと、
を含むプログラム。
1.車載システムの概要
図1に示される車載システム100は、車両190に搭載されるシステムであり、電源システム101及び負荷106を有する。車両190には、負荷106、電源部102、給電制御装置1だけでなく、その他の部品も多数搭載されている。車載システム100は、図2のように車両190に搭載されるシステムである。車載システム100では、電源システム101が負荷106に供給する電力を制御する。
給電制御装置1は、図2のように車両190に搭載される装置であり、負荷106などの車載負荷への給電を制御する装置である。給電制御装置1は、主に、第1スイッチ11、第2スイッチ12、第3スイッチ13、第1導電路21、第2導電路22、制御部30、検出部40、報知部60などを備える。
給電制御装置1は、図1に示される各種部品(例えば、第1スイッチ11、第2スイッチ12、第3スイッチ13、第1導電路21、第2導電路22、制御部30、検出部40など)が共通の基板80(図3、図4)に実装される構成をなす。なお、図3、図4では、第1スイッチ11、第2スイッチ12、基板80以外の部品の図示は省略されている。
次の説明は、給電制御装置1で行われる給電制御に関する。図5に示される給電制御は、制御装置32の内部又は外部に設けられた記憶部に記憶されたプログラムによって実行される。制御部30(具体的には制御装置32)は、このプログラムに従い、図5の制御を実行する。
上述された給電制御装置1、給電制御装置1を用いた給電方法、給電制御装置1に用いられるプログラムは、オフ信号が与えられているときにスイッチが通電状態で維持される異常が発生した場合に、そのスイッチに電流が流れ続けることを早期に抑制しやすい。具体的には、給電制御装置1は、第1スイッチ11をオン状態とする第1制御を行うことで、相対的にオン抵抗が小さい第1スイッチ11を介して電流を流すことができる。そして、給電制御装置1は、異常検出部によって異常が検出された場合には、第2スイッチ12をオン状態とオフ状態とに交互に切り替えるオンオフ制御を行うことで、第1導電路21と第2導電路22との間において流れる電流を、第1スイッチ11と第2スイッチ12とに分散させることができる。よって、第1スイッチ11の実効電流が抑えられ、損失の増大に起因する発熱が抑制される。
本開示は、上記記述及び図面によって説明した実施形態に限定されるものではない。例えば、上述又は後述の実施形態の特徴は、矛盾しない範囲であらゆる組み合わせが可能である。また、上述又は後述の実施形態のいずれの特徴も、必須のものとして明示されていなければ省略することもできる。更に、上述した実施形態は、次のように変更されてもよい。
10 :スイッチ装置
11 :第1スイッチ
12 :第2スイッチ
13 :第3スイッチ
21 :第1導電路
22 :第2導電路
23A :導電路
23B :導電路
30 :制御部(異常検出部、抵抗検出部)
32 :制御装置
34 :駆動回路
35 :駆動回路
36 :駆動回路
40 :検出部
42 :検出回路(抵抗検出部)
44 :電流センサ(抵抗検出部)
60 :報知部
80 :基板
80A :端部
80B :端部
80C :端部
80D :端部
81 :一方面
82 :他方面
100 :車載システム
101 :電源システム
102 :電源部
104 :電力路
106 :負荷
108 :負荷(所定の負荷)
190 :車両
C1 :中心位置
C2 :中心位置
Claims (9)
- 車両に搭載される給電制御装置であって、
第1導電路と第2導電路との間に設けられ、オン信号が与えられることに応じてオン状態に切り替わり、オフ信号が与えられることに応じてオフ状態に切り替わる第1スイッチと、
前記第1導電路と前記第2導電路との間において前記第1スイッチに対して並列に設けられる第2スイッチと、
前記第1スイッチに対して前記オフ信号が与えられているときに前記第1スイッチが通電状態で維持される異常を検出する異常検出部と、
前記第1スイッチ及び前記第2スイッチを制御する制御部と、
を有し、
前記第1スイッチのオン抵抗は、前記第2スイッチのオン抵抗よりも小さく、
前記制御部は、前記第1スイッチをオン状態とする第1制御と、前記異常検出部によって前記異常が検出された場合に前記第2スイッチをオン状態とオフ状態とに交互に切り替えるオンオフ制御と、を行う
給電制御装置。 - 前記車両は、走行可能状態と走行不能状態とに切り替わる構成をなし、
少なくとも前記車両の走行可能状態のときに前記第2スイッチの前記オンオフ制御を行う場合に車内の乗員に向けて異常の報知を行う報知部を有する
請求項1に記載の給電制御装置。 - 前記車両は、走行可能状態と走行不能状態とに切り替わる構成をなし、
前記制御部は、前記オンオフ制御を行っているときに前記車両が前記走行可能状態から前記走行不能状態に切り替わった場合、前記走行不能状態への切り替わり後も前記オンオフ制御を継続する
請求項1又は請求項2記載の給電制御装置。 - 前記制御部は、前記走行不能状態への切り替わり後に前記オンオフ制御を継続する場合、前記第1スイッチ及び前記第2スイッチに電流を流すための電力供給源である蓄電部から所定の負荷への給電を行う
請求項3に記載の給電制御装置。 - 前記第1スイッチが通電状態のときの当該第1スイッチの抵抗を検出する抵抗検出部を有し、
前記制御部は、PWM信号を出力し、前記PWM信号によって前記第2スイッチのオンオフを制御するように前記オンオフ制御を行い、前記抵抗検出部で検出される抵抗に基づいて前記PWM信号のデューティを設定する
請求項1から請求項4のいずれか一項に記載の給電制御装置。 - 前記第1スイッチ及び前記第2スイッチは、共通の基板に実装され、
前記第1スイッチは、前記基板の一方面に実装され、
前記第2スイッチは、前記基板の他方面に実装される
請求項1から請求項5のいずれか一項に記載の給電制御装置。 - 前記第1スイッチ及び前記第2スイッチは、共通の基板に実装され、
前記第1スイッチは、前記基板における所定方向一方側に設けられた第1端部寄りに実装され、
前記第2スイッチは、前記基板において前記所定方向において一方側とは反対側の第2端部寄りに実装される
請求項1から請求項6のいずれか一項に記載の給電制御装置。 - 給電制御装置を用い、車両内での給電を制御する給電制御方法であって、
前記給電制御装置は、
第1導電路と第2導電路との間に設けられ、オン信号が与えられることに応じてオン状態に切り替わり、オフ信号が与えられることに応じてオフ状態に切り替わる第1スイッチと、
前記第1導電路と前記第2導電路との間において前記第1スイッチに対して並列に設けられる第2スイッチと、
前記第1スイッチに対して前記オフ信号が与えられているときに前記第1スイッチが通電状態で維持される異常を検出する異常検出部と、
前記第1スイッチ及び前記第2スイッチを制御する制御部と、
を有し、
前記第1スイッチのオン抵抗は、前記第2スイッチのオン抵抗よりも小さく、
前記制御部が、前記第1スイッチをオン状態とする第1制御と、前記異常検出部によって前記異常が検出された場合に前記第2スイッチをオン状態とオフ状態とに交互に切り替えるオンオフ制御と、を行う
給電制御方法。 - 車両内に搭載される給電制御装置に給電制御を行わせるプログラムであって、
前記給電制御装置は、
第1導電路と第2導電路との間に設けられ、オン信号が与えられることに応じてオン状態に切り替わり、オフ信号が与えられることに応じてオフ状態に切り替わる第1スイッチと、
前記第1導電路と前記第2導電路との間において前記第1スイッチに対して並列に設けられる第2スイッチと、
前記第1スイッチに対して前記オフ信号が与えられているときに前記第1スイッチが通電状態で維持される異常を検出する異常検出部と、
前記第1スイッチ及び前記第2スイッチを制御する制御部と、
を有し、
前記第1スイッチのオン抵抗は、前記第2スイッチのオン抵抗よりも小さく、
当該プログラムは、
前記第1スイッチをオン状態とする第1制御を前記制御部に行わせるステップと、
前記異常検出部によって前記異常が検出された場合に前記第2スイッチをオン状態とオフ状態とに交互に切り替えるオンオフ制御を前記制御部に行わせるステップと、
を含むプログラム。
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JP2013236297A (ja) * | 2012-05-10 | 2013-11-21 | Yazaki Corp | 半導体スイッチの制御装置 |
JP2015050553A (ja) * | 2013-08-30 | 2015-03-16 | 株式会社オートネットワーク技術研究所 | 半導体装置 |
JP2017183764A (ja) * | 2016-03-28 | 2017-10-05 | 矢崎総業株式会社 | 電源遮断装置 |
WO2018147103A1 (ja) * | 2017-02-10 | 2018-08-16 | 株式会社オートネットワーク技術研究所 | スイッチ制御装置、スイッチ切替え方法及びコンピュータプログラム |
JP2018133891A (ja) * | 2017-02-14 | 2018-08-23 | 株式会社オートネットワーク技術研究所 | 給電制御装置 |
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JP2013236297A (ja) * | 2012-05-10 | 2013-11-21 | Yazaki Corp | 半導体スイッチの制御装置 |
JP2015050553A (ja) * | 2013-08-30 | 2015-03-16 | 株式会社オートネットワーク技術研究所 | 半導体装置 |
JP2017183764A (ja) * | 2016-03-28 | 2017-10-05 | 矢崎総業株式会社 | 電源遮断装置 |
WO2018147103A1 (ja) * | 2017-02-10 | 2018-08-16 | 株式会社オートネットワーク技術研究所 | スイッチ制御装置、スイッチ切替え方法及びコンピュータプログラム |
JP2018133891A (ja) * | 2017-02-14 | 2018-08-23 | 株式会社オートネットワーク技術研究所 | 給電制御装置 |
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