WO2019065236A1 - Dispositif de commande d'alimentation électrique - Google Patents

Dispositif de commande d'alimentation électrique Download PDF

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Publication number
WO2019065236A1
WO2019065236A1 PCT/JP2018/033783 JP2018033783W WO2019065236A1 WO 2019065236 A1 WO2019065236 A1 WO 2019065236A1 JP 2018033783 W JP2018033783 W JP 2018033783W WO 2019065236 A1 WO2019065236 A1 WO 2019065236A1
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WIPO (PCT)
Prior art keywords
voltage
storage battery
starter
restart
boost
Prior art date
Application number
PCT/JP2018/033783
Other languages
English (en)
Japanese (ja)
Inventor
良樹 竹内
祐次 池ヶ谷
Original Assignee
株式会社デンソー
スズキ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 株式会社デンソー, スズキ株式会社 filed Critical 株式会社デンソー
Priority to DE112018004398.3T priority Critical patent/DE112018004398T5/de
Publication of WO2019065236A1 publication Critical patent/WO2019065236A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0851—Circuits or control means specially adapted for starting of engines characterised by means for controlling the engagement or disengagement between engine and starter, e.g. meshing of pinion and engine gear
    • 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
    • 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
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/10—Parallel operation of dc sources
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0851—Circuits or control means specially adapted for starting of engines characterised by means for controlling the engagement or disengagement between engine and starter, e.g. meshing of pinion and engine gear
    • F02N11/0855—Circuits or control means specially adapted for starting of engines characterised by means for controlling the engagement or disengagement between engine and starter, e.g. meshing of pinion and engine gear during engine shutdown or after engine stop before start command, e.g. pre-engagement of pinion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0862—Circuits or control means specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery
    • F02N11/0866—Circuits or control means specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery comprising several power sources, e.g. battery and capacitor or two batteries

Definitions

  • the present disclosure relates to a power supply control device applied to an on-vehicle power supply system having a plurality of storage batteries.
  • an on-vehicle power supply system mounted on a vehicle for example, a lead storage battery and a lithium ion storage battery are connected in parallel to a starter (for example, a starter, ISG, etc.), and the lead storage battery
  • a starter for example, a starter, ISG, etc.
  • the lead storage battery There is a dual power supply system in which the lithium ion storage batteries are connected in parallel (for example, Patent Document 1).
  • power is supplied to various electric loads while using two storage batteries properly by switch control.
  • an electric load there is an electric load which needs to apply a constant voltage after boosting the voltage of the storage battery with a booster circuit.
  • an electric load there is, for example, a blower motor in which the air volume of the air blowing changes due to the change in the number of rotations according to the applied voltage.
  • the voltage of the storage battery is acquired (detected), and feedback control is performed to boost the voltage by the booster circuit based on the acquired voltage. There is. Thereby, it is possible to supply power at a constant voltage regardless of how the voltage of the storage battery changes as the storage battery is charged and discharged.
  • the switch when the switch is used to cut off the current between the lead storage battery from which the voltage is obtained and the booster circuit, the voltage can not be properly boosted if a voltage is applied from the lithium ion storage battery to the booster circuit. There is a risk.
  • the voltage difference between the lead storage battery and the lithium ion storage battery becomes large due to the drive of the starter, there is a high possibility that the voltage can not be appropriately boosted.
  • This indication is made in view of the above-mentioned situation, and when making a starter drive, it makes it a main purpose to provide a power supply control device which enables appropriate voltage application to an electric load.
  • the first storage battery and the second storage battery are connected in parallel to the booster circuit connected to the electric load, and the first storage battery and the second storage battery are connected when restarting the internal combustion engine in the idling stop state.
  • the starter is driven by the storage battery or the second storage battery, and the electric path connecting the first storage battery and the second storage battery is closer to the first storage battery than a connection point with the booster circuit.
  • a power supply control device applied to an on-vehicle power supply system including a switch provided, a voltage acquisition unit acquiring a voltage of the first storage battery, and application in the booster circuit according to the acquired voltage acquired by the voltage acquisition unit
  • a step-up control unit which determines a step-up amount with respect to a voltage and executes step-up control of the step-up circuit according to the step-up amount;
  • the switch is switched to be in a state of de-energizing at least during the restart, and the boost control unit is controlled by the restart determination unit.
  • the switch can be operated by the switch even if the starter is driven based on any of the power of the first storage battery and the second storage battery.
  • Energization is interrupted between the first storage battery and the second storage battery.
  • the current supply between the booster circuit and the first storage battery is also cut off, and the voltage of the second storage battery is input to the booster circuit.
  • the boosting amount is determined according to the voltage of the first storage battery, the voltage can not be appropriately boosted because the voltage difference between the first storage battery and the second storage battery is large.
  • the boost control unit changes the boost amount determined according to the acquired voltage, and boosts the voltage based on the changed boost amount. I decided. Thereby, even if the voltage difference between the first storage battery and the second storage battery becomes large based on the drive of the starter, the voltage can be boosted to an appropriate voltage and applied to the electric load.
  • FIG. 1 is an electric circuit diagram showing an on-vehicle power supply system.
  • FIG. 2 is a diagram showing the relationship between the boost amount and the acquired voltage
  • Figure 3 shows the voltage drop of the acquisition voltage
  • FIGS. 4A and 4B are diagrams showing the relationship between the rotational speed of the engine and the drive start timing of the starter
  • FIG. 5 shows that (a) and (b) show convergence of polarization
  • FIG. 6 is a flowchart showing boost amount change processing
  • FIG. 7 is a diagram showing determination timings in the second embodiment
  • FIG. 8 is an electric circuit diagram showing an on-vehicle power supply system according to a third embodiment
  • FIG. 9 is a diagram showing a voltage drop in the third embodiment.
  • the on-vehicle power supply system 100 is a dual power supply system having a lead storage battery 11 as a first storage battery and a lithium ion storage battery 12 as a second storage battery. Power can be supplied to a starter 13 as a machine and a blower motor 14 as an electric load. Further, the on-vehicle power supply system 100 is communicably connected to an engine ECU 201 that controls the engine 200.
  • the lead storage battery 11 is a known general purpose storage battery.
  • the lithium ion storage battery 12 is a high-density storage battery with less power loss during charge and discharge, higher power density, and higher energy density than the lead storage battery 11.
  • the lithium ion storage battery 12 may be a storage battery having high energy efficiency at the time of charge and discharge as compared with the lead storage battery 11.
  • the lead storage battery 11 is a storage battery having a storage capacity larger than that of the lithium ion storage battery 12.
  • the lithium ion storage battery 12 is configured as a battery pack including a plurality of single cells. The rated voltages of these storage batteries 11 and 12 are all the same, for example, 12V.
  • the lithium ion storage battery 12 is housed in a housing case and configured as a battery unit U integrated with a substrate.
  • the battery unit U is shown surrounded by a broken line.
  • the battery unit U has external terminals P1 and P2, and among them, the lead storage battery 11, the starter 13 and the BCM 20 are connected to the external terminal P1, and the blower motor 14 and the electric load 15 are connected to the external terminal P2.
  • the blower motor 14 is connected to the external terminal P1 via a booster circuit 30 described later.
  • the starter 13 is used when the engine 200 is started.
  • the starter 13 is, for example, a tandem type that can independently control the rotational drive of a pinion gear by a motor and the extrusion of the pinion gear.
  • the electrical load 15 includes a constant voltage load that requires the voltage of the supplied power to fluctuate within a predetermined or predetermined range.
  • the electrical load 15 can be said to be a protected load.
  • Specific examples of the electric load 15 which is a constant voltage required load include navigation devices, audio devices, meter devices, and various ECUs such as an engine ECU. In this case, by suppressing the voltage fluctuation of the supplied power, the occurrence of unnecessary reset or the like in each of the above devices is suppressed, and stable operation can be realized.
  • the electric load 15 may include a traveling system actuator such as an electric steering device or a brake device.
  • the blower motor 14 is a motor used for blowing air.
  • the blower motor 14 is connected to a blower fan (not shown) and is driven based on the power supplied from the lead storage battery 11 or the lithium ion storage battery 12.
  • the number of revolutions of the blower motor 14 depends on the voltage applied to the blower motor 14, and when the applied voltage is high, the number of revolutions is larger than when it is low. Then, as the rotational speed of the blower motor 14 increases, the air volume also increases accordingly.
  • the required voltage of the blower motor 14 is 14 V, which is higher than the rated voltage (12 V) of the lead storage battery 11 or the lithium ion storage battery 12. Therefore, they are connected via the booster circuit 30.
  • the booster circuit 30 is a circuit that boosts the voltage applied to the booster circuit 30 and applies the boosted voltage to the blower motor 14.
  • the booster circuit 30 is, for example, a chopper type DC-DC converter.
  • on / off control is performed on the switching elements in the boosting circuit 30.
  • the applied voltage is boosted by the booster circuit 30 by controlling the duty ratio. That is, at the time of the boosting operation by the boosting circuit 30, PWM control as boosting control is performed, whereby the voltage applied to the boosting circuit 30 is boosted and output as an output voltage.
  • a BCM (Body Control Module) 20 is configured by a microcomputer including a CPU, a ROM, a RAM, an input / output interface, and the like.
  • the BCM 20 corresponds to a power control device.
  • the BCM 20 has various functions.
  • the BCM 20 has functions as a voltage acquisition unit 21 that acquires the voltage of the lead storage battery 11 and a step-up control unit 22.
  • the BCM 20 as the voltage acquisition unit 21 acquires the voltage of the lead storage battery 11 detected from the voltage detection circuit 21 a that detects the voltage of the lead storage battery 11. Then, the BCM 20 as the boost control unit 22 determines a boost amount according to the acquired voltage acquired by the voltage acquisition unit 21 and boosts the voltage input (applied) to the booster circuit 30 based on the boost amount. I do.
  • the boosting amount determines how much the voltage is boosted with respect to the applied voltage applied to the boosting circuit 30.
  • the boost amount is determined in accordance with the acquired voltage as shown in FIG. Specifically, the boost amount is determined such that the predetermined voltage (the required voltage of the blower motor 14, that is, 14 V) is obtained by adding the boost amount to the acquired voltage.
  • the boost amount is stored in the storage unit of the BCM 20.
  • the BCM 20 determines the boosting amount according to the acquired voltage, it determines the duty ratio based on the boosting amount and performs PWM control on the boosting circuit 30. As a result, the booster circuit 30 outputs a voltage obtained by boosting the voltage by the amount of boost to the applied voltage as the output voltage to the blower motor 14.
  • the voltage detection circuit 21a is provided inside the BCM 20 in the present embodiment, but may be provided outside. Further, the BCM 20 operates by the power supply from the lead storage battery 11.
  • the various functions of the BCM 20 may be realized by an electronic circuit that is hardware, or at least a part may be realized by software, that is, a process executed on a computer.
  • the battery unit U is provided with an electric path L1 connecting the external terminals P1 and P2 and an electric path L2 connecting the connection point N1 on the electric path L1 and the lithium ion storage battery 12 as an electric path in the unit .
  • the switch SW1 as a first switch is provided in the electric path L1
  • the switch SW2 as a second switch is provided in the electric path L2.
  • Electric power to the blower motor 14 is supplied from the lead storage battery 11 or the lithium ion storage battery 12 via the electric paths L1 and L2.
  • switch SW1 is provided closer to lead storage battery 11 than external connection point N1 (external terminal P1 side), and lithium ion storage battery than connection point N1.
  • a switch SW2 is provided on the 12 side.
  • the battery unit U includes a switch control unit 51 that controls each of the switches SW1 to SW2.
  • the switch control unit 51 is configured by a microcomputer including a CPU, a ROM, a RAM, an input / output interface, and the like.
  • the switch control unit 51 controls the switches SW1 to SW2 and the like based on the storage state and the like of the storage batteries 11 and 12. Further, for example, when the engine 200 is started in the idling stop state, the switch control unit 51 opens (off) the switch SW1 and closes (on) the switch SW2. As a result, the conduction between the lead storage battery 11 and the blower motor 14 or the electric load 15 is cut off, and power is supplied from the lithium ion storage battery 12 to the blower motor 14 or the electric load 15. Therefore, a large amount of power is consumed based on the driving of the starter 13, and even if a voltage drop occurs in the lead storage battery 11, it is possible to prevent the power supply to the blower motor 14 and the electric load 15 from being affected.
  • Engine ECU 201 performs idling stop control of engine 200.
  • idling stop control stops combustion of engine 200 when a predetermined automatic stop condition is satisfied, and then restarts engine 200 when a predetermined restart condition is satisfied.
  • the automatic stop condition for example, the vehicle speed of the host vehicle is in the engine automatic stop speed range (for example, vehicle speed ⁇ 10 km / h) and that the accelerator operation is canceled or the brake operation is performed. included.
  • the restart condition includes, for example, that the accelerator operation has been started and that the brake operation has been released.
  • the engine ECU 201 also has a function of determining that the engine 200 has been completely destroyed (that is, the restart has been completed) after the engine 200 is restarted.
  • the engine control function and the idling stop function may be implemented by separate ECUs.
  • the engine ECU 201 is connected to the BCM 20 and outputs a signal to the BCM 20 indicating that the restart condition is satisfied (that is, the restart of the engine 200 is performed using the starter 13). Is configured. Further, when it is determined that the restart is completed, the engine ECU 201 is configured to output a signal indicating that to the BCM 20.
  • the BCM 20 of the present embodiment obtains the voltage of the lead storage battery 11, determines the amount of boosting according to the acquired voltage, and boosts the voltage input (applied) to the boosting circuit 30 by the amount of boosting. ing. For this reason, when the switch SW1 is closed and the booster circuit 30 and the lead storage battery 11 are energized, the BCM 20 is a booster circuit so as to have an appropriate output voltage (that is, a voltage required by the blower motor 14). 30 can boost the applied voltage.
  • the switch SW1 may be opened, and the conduction between the lead storage battery 11 and the booster circuit 30 may be cut off.
  • a voltage difference may occur between the voltage applied to the booster circuit 30 and the voltage of the lead storage battery 11.
  • the switch SW1 is opened in order to prevent the influence of the voltage drop of the lead storage battery 11, but in this case, as shown in FIG. growing.
  • the amount of boosting is determined based on the voltage of the lead storage battery 11 Can not be boosted to an appropriate output voltage. For example, when the BCM 20 determines the amount of boosting according to the acquired voltage at which the voltage has dropped, the amount of boosting will be increased by the amount of decrease. However, since the voltage actually applied to the booster circuit 30 is the voltage of the lithium ion storage battery 12, the voltage does not decrease in the same manner as the acquired voltage (voltage of the lead storage battery 11). Therefore, as indicated by a broken line in FIG.
  • the BCM 20 has a function as the restart determination unit 23 that determines whether the restart of the engine 200 is performed using the starter 13. Then, the BCM 20 as the boost control unit 22 changes the boost amount determined according to the acquired voltage, on the condition that the restart determination unit 23 determines that the restart of the engine 200 is performed, and after the change The voltage is boosted based on the amount of voltage boost.
  • the BCM 20 changes the boosting amount so that the output voltage of the boosting circuit 30 is lower than the output voltage of the boosting circuit 30 when the boosting control is performed by the boosting amount determined according to the acquired voltage. That is, the BCM 20 changes the amount of boost according to the acquired voltage to a smaller side.
  • the BCM 20 has a value corresponding to the voltage drop of the acquired voltage based on the driving of the starter 13 under the prediction that the acquired voltage decreases based on the driving of the starter 13 from the boosting amount according to the acquired voltage
  • the absolute boost value is subtracted to determine the post-change boosting amount. Since the mode of the voltage drop based on the driving of the starter 13 is almost the same each time, it is measured in advance by experiments etc. and stored in the storage unit of the BCM 20.
  • the BCM 20 reads this and subtracts a value corresponding to the voltage drop of the acquired voltage based on the driving of the starter 13 from the boosting amount corresponding to the acquired voltage.
  • the voltage drop of the acquisition voltage (lead storage battery 11) based on the drive of the starter 13 changes according to the time from the drive start of the starter 13, as shown in FIG. For this reason, it is desirable to change the value corresponding to the voltage drop to be subtracted from the boosting amount corresponding to the acquired voltage according to the time from the start of driving of the starter 13. As a result, as shown by the solid line in FIG. 3, the voltage can be boosted to an appropriate voltage and applied to the blower motor 14.
  • engine ECU 201 is set according to the rotational speed (rotational speed (rpm)) of engine 200 when restart is determined. It is When the engine 200 is stopped (when the output shaft of the engine 200 is not rotating), the drive of the starter 13 is started when it is determined that the restart is performed.
  • engine ECU 201 rotates the engine ECU 201 to prevent noise. After waiting for the speed to reach a low speed area (for example, an area of 300 rpm or less, and in the present embodiment, 0 or around 0), the driving of the starter 13 is started.
  • a low speed area for example, an area of 300 rpm or less, and in the present embodiment, 0 or around 0
  • the BCM 20 has a function as the estimation unit 24 that estimates the drive start time of the starter 13 when it is determined that the restart is to be performed. Then, the BCM 20 starts to change the boosting amount based on the start of driving of the starter 13 estimated by the estimation unit 24.
  • the BCM 20 as the estimation unit 24 will be described in detail with reference to FIG.
  • the BCM 20 estimates the drive start time according to the rotational speed of the engine 200 when it is determined that the restart is to be performed (when the restart condition is satisfied). 3 and 4, when the restart condition is satisfied, it is time T11, when the drive is started, it is time T12, and the timing indicating the complete explosion of the engine is time T13. Further, in FIG. 3 and FIG. 4, the timing at which the engine 200 can not return independently is at time T10. Further, the state (rotational speed etc.) of the engine 200 may be acquired from the engine ECU 201 or the like. Then, the BCM 20 starts changing the boosting amount at the estimated start of driving.
  • the BCM 20 has a function as the completion determination unit 25 that determines that the restart of the engine 200 is completed. However, even if the engine 200 is completely detonated and the restart is completed, and even if the driving of the starter 13 is ended accordingly, the lead storage battery 11 is polarized due to the power consumption, so FIGS. 3 and 5 As shown in, there is a time difference until the voltage of the lead storage battery 11 returns to the rated voltage.
  • the BCM 20 can not appropriately boost the voltage as described above. Specifically, when the amount of boost according to the acquired voltage is determined, the output voltage of the booster circuit 30 is increased. The time until the voltage of the lead storage battery 11 returns to the rated voltage after the polarization is eliminated is determined according to the state (polarization state) of the lead storage battery 11.
  • the polarization state of the lead storage battery 11 can be identified from the history of charge and discharge, and as the number of discharges increases and as the discharge becomes deeper and longer, the polarization increases and the time to return to the rated voltage It is known to be long.
  • the BCM 20 as the boost control unit 22 has a standby time according to the state of the lead storage battery 11 from when it is determined that the restart is completed (time T13).
  • the change of the boosting amount is ended at time (time T14, T14a, T14b). That is, after the standby time according to the state of the lead storage battery 11 elapses from the time when it is determined that the restart is completed, the BCM 20 determines the boosting amount according to the acquired voltage, and boosts the voltage based on the boosting amount.
  • the voltage applied to the circuit 30 is boosted.
  • the output voltage of the booster circuit 30 is lower than the output voltage of the booster circuit 30 when the BCM 20 is subjected to boost control by the boost amount determined according to the acquired voltage until the polarization converges. Change the boost amount. That is, the BCM 20 changes the pressure boosting amount determined according to the acquired voltage to a smaller side.
  • the BCM 20 subtracts the value (absolute value) corresponding to the voltage drop based on the polarization from the boosting amount according to the acquired voltage based on the prediction that the acquired voltage is decreased due to the polarization, and after the change The amount of pressure boost is determined. Since the mode of the voltage drop based on the polarization of the lead storage battery 11 is almost the same each time, it is measured in advance by experiments etc. and stored in the storage unit of the BCM 20. The BCM 20 reads this out and subtracts a value corresponding to the voltage drop of the acquired voltage based on the polarization from the amount of boost according to the acquired voltage.
  • the voltage drop of the lead storage battery 11 based on polarization differs according to the polarization state (history of charge and discharge) of the lead storage battery 11 as shown in FIG. 5 (a) shows the convergence of the polarization of the lead storage battery 11 with a small discharge polarization
  • FIG. 5 (b) shows the convergence of the polarization of the lead storage battery 11 with a large discharge polarization.
  • the convergence period of polarization (time T13 to T14a) in lead storage battery 11 with small discharge polarization is shorter than the convergence period of polarization in lead storage battery 11 with large discharge polarization (time T13 to T14b) It has become.
  • the voltage drop of the lead storage battery 11 based on the polarization converges (is reduced) by the elapsed time from the time when it is determined that the restart is completed. For this reason, it is desirable to change the value of the voltage drop to be subtracted from the amount of boost based on the polarization state of the lead storage battery 11 and the elapsed time from the completion of the restart.
  • the voltage can be boosted to an appropriate voltage and applied to the blower motor 14.
  • the boost amount changing process is executed by the BCM 20 at predetermined intervals.
  • the PWM control by the BCM 20 for causing the boosting circuit 30 to perform the boosting operation is executed regardless of the boosting amount changing process while the blower motor 14 is in operation.
  • the BCM 20 determines whether or not the idling stop state is in progress (step S101). If the determination result is negative (step S101: NO), the starter 13 is driven and the boost amount is not changed, so the boost amount change processing is ended.
  • step S101 determines whether the restart of the engine 200 is performed using the starter 13 (step S102). Specifically, the BCM 20 determines whether or not a signal indicating that the restart condition is satisfied is input from the engine ECU 201. If the determination result is negative (step S102: NO), the boost amount changing process is ended.
  • step S102 determines whether or not the driving of the starter 13 is performed (step S103). For example, when the BCM 20 determines from the rotational speed of the engine 200 that self-sustaining recovery is possible, it determines that the driving of the starter 13 is not performed and determines that the self-sustaining recovery is not possible, the driving of the starter 13 is performed. It is determined that If the determination result is negative (step S103: NO), the starter 13 is driven and the boost amount is not changed, so the boost amount change processing is ended.
  • step S104 the BCM 20 estimates the drive start time of the starter 13 (step S104). Specifically, according to the rotational speed of engine 200 at the time of restart condition satisfaction, the time from the time of satisfaction of the restart condition to the drive start time of starter 13 is estimated.
  • step S105 determines whether it is time to start driving the starter 13 (step S105). Specifically, it is determined whether or not the time from when the restart condition is established to when the drive of the starter 13 is started has elapsed. If the determination result of step S105 is negative (step S105: NO), the process waits for a predetermined time and executes step S105 again.
  • step S105 If the determination result in step S105 is affirmative (step S105: YES), the BCM 20 starts changing the boost amount (step S106). After step S106, the BCM 20 subtracts the value corresponding to the voltage drop based on the driving of the starter 13 from the boost amount corresponding to the acquired voltage to determine the post-change boost amount. Then, the BCM 20 determines the duty ratio based on the post-change boosting amount, and executes PWM control on the boosting circuit 30.
  • step S107 it is determined whether or not the engine 200 has completely detonated and a signal indicating that the restart has been completed is input from the engine ECU 201. If the determination result is negative (step S107: NO), the process waits for a predetermined time and executes step S107 again.
  • step S107 If the determination result in step S107 is affirmative (step S107: YES), the BCM 20 estimates the time from when the restart is completed to when the voltage reduction based on the polarization ends (polarization converges) (step S108). In step S108, the BCM 20 estimates, based on the polarization state of the lead storage battery 11, a time from when the restart is completed to when the voltage drop based on the polarization is finished. Note that after step S108, the BCM 20 subtracts the value corresponding to the voltage drop based on the polarization from the step-up amount corresponding to the acquired voltage to determine the post-change step-up amount.
  • step S109 the BCM 20 determines whether or not the polarization of the lead storage battery 11 has ended (converged) (step S109). Specifically, it is determined whether or not the time until the voltage drop based on the polarization ends (the polarization converges) has elapsed since the restart completion. If the determination result of step S109 is negative (step S109: NO), the process waits for a predetermined time and executes step S109 again.
  • step S109 If the determination result of step S109 is affirmative (step S109: YES), the BCM 20 ends the change of the boost amount (step S110). After step S110, the BCM 20 determines a boost amount according to the acquired voltage, and executes PWM control on the boost circuit 30 based on the boost amount. Then, the BCM 20 ends the boosting amount changing process.
  • the starter 13 When the starter 13 is driven, the voltage of the lead storage battery 11 for supplying power to the starter 13 drops, so that the switch SW1 cuts off the conduction between the lead storage battery 11 and the lithium ion storage battery 12. At that time, in the configuration of the above embodiment, the conduction between the booster circuit 30 and the lead storage battery 11 is also cut off, and the voltage of the lithium ion storage battery 12 is input to the booster circuit 30. At this time, if the boosting amount is determined according to the voltage of the lead storage battery 11, the voltage difference between the lead storage battery 11 and the lithium ion storage battery 12 is large, so that the voltage can not be boosted appropriately.
  • the BCM 20 changes the boosting amount determined according to the acquired voltage on the condition that it is determined that the engine 200 is to be restarted, and boosts the pressure based on the post-changing boosting amount. Therefore, even if the voltage difference between the lead storage battery 11 and the lithium ion storage battery 12 becomes large based on the driving of the starter 13, the voltage can be boosted to an appropriate voltage and applied to the blower motor 14 .
  • the BCM 20 starts to change the boosting amount based on the start of driving of the starter 13 estimated by the estimation unit 24. Therefore, it is possible to change the boosting amount at an appropriate timing according to the timing of the voltage drop of the lead storage battery 11 based on the driving of the starter 13. Thus, the voltage can be boosted to an appropriate voltage and applied to the blower motor 14.
  • the BCM 20 The drive start time is estimated according to the rotational speed of the engine 200. Therefore, it is possible to change the boosting amount at an appropriate timing according to the timing of the voltage drop of the lead storage battery 11 based on the driving of the starter 13.
  • the starter 13 Since the starter 13 is supplied with power from the lead storage battery 11, the acquired voltage (the voltage of the lead storage battery 11) decreases based on the driving of the starter 13, while the lithium ion storage battery 12 inputs (applies) a voltage to the booster circuit 30. Will not decrease.
  • the applied voltage the voltage of the lithium ion storage battery 12
  • the voltage of the lithium ion storage battery 12 does not decrease. Becomes large. Therefore, the BCM 20 is changed to reduce the boosting amount determined in accordance with the acquired voltage.
  • the BCM 20 estimates a value corresponding to the voltage drop of the acquired voltage based on the driving of the starter 13 under the prediction that the acquired voltage decreases based on the driving of the starter 13 from the boosting amount according to the acquired voltage. Subtraction was performed to determine the post-change boosting amount. Thus, the voltage can be boosted to an appropriate voltage and applied to the blower motor 14.
  • the switch SW1 is switched to be in a state of deenergization at least during the restart. Thereby, it is possible to prevent both the lead storage battery 11 and the lithium ion storage battery 12 from a voltage drop based on the driving of the starter 13, and to minimize the influence thereof.
  • the drive start time of the starter 13 is estimated based on the rotational speed of the engine 200 when the restart condition is satisfied.
  • the starter 13 is based on the voltage of the lead storage battery 11. It is determined that it has been driven. Details will be described below.
  • the BCM 20 when the acquired voltage becomes lower than a predetermined threshold (time T40), the BCM 20 indicates that the driving of the starter 13 is started based on the restart of the engine 200. Determine (affirm the drive determination).
  • the threshold value is a value indicating that a voltage drop of the lead storage battery 11 has occurred based on the driving of the starter 13.
  • the BCM 20 changes the boosting amount determined in accordance with the acquired voltage, and boosts the voltage based on the post-changing boosting amount.
  • the BCM 20 determines that the restart of the engine 200 is completed and the driving of the starter 13 is completed.
  • the completion determination value is preferably a value equal to or more than the threshold. Then, in this case, the BCM 20 ends the change of the boosting amount and boosts the voltage based on the boosting amount according to the acquired voltage.
  • the configuration and control can be simplified. For example, it is not necessary to input the rotational speed (rotational speed) of the engine 200 from the engine ECU 201, and it is not necessary to determine the drive period of the starter 13 or the end of polarization.
  • the start or completion of restart may be determined. This eliminates the need to determine whether the restart condition is satisfied.
  • the starter 13 is driven by the power of the lead storage battery 11.
  • the circuit configuration may be changed, and the starter 13 may be driven by the power of the lithium ion storage battery 12. Details will be described below.
  • the lead storage battery 11, the electric load 15, and the BCM 20 are connected to the external terminal P1 of the battery unit U of the third embodiment, and the starter 13 and the blower motor 14 are connected to the external terminal P2. ing.
  • the voltage difference between the voltage applied to the booster circuit 30 (that is, the voltage of the lithium ion storage battery 12) and the voltage of the lead storage battery 11 becomes large, and the voltage of the lead storage battery 11 Even if the amount of boosting is determined based on the above, it can not be boosted so as to obtain an appropriate output voltage.
  • the BCM 20 determines the boosting amount according to the acquired voltage, the voltage applied to the booster circuit 30 is falling, so the output voltage of the booster circuit 30 is as shown by the broken line in FIG. It will decrease for a minute.
  • the BCM 20 as the boost control unit 22 changes the boost amount determined in accordance with the acquired voltage, and changes it.
  • Boosting control is to be performed based on the subsequent boosting amount.
  • the BCM 20 starts changing the boost amount at the start of driving (at time T51).
  • the BCM 20 changes the boosting amount so that the output voltage of the boosting circuit 30 becomes higher than the output voltage of the boosting circuit 30 in the case where the boosting control is performed by the boosting amount determined according to the acquired voltage. That is, the BCM 20 is changed to increase the boost amount determined in accordance with the acquired voltage.
  • the BCM 20 is based on the voltage drop of the lithium ion storage battery 12 based on the driving of the starter 13 under the prediction that the lithium ion storage battery 12 is reduced based on the driving of the starter 13 to the boost amount corresponding to the acquired voltage.
  • the corresponding value absolute value
  • the post-change boosting amount is determined.
  • the mode of the voltage drop of the lithium ion storage battery 12 based on the drive of the starter 13 is measured in advance by experiment etc. and stored in the storage unit of the BCM 20.
  • the BCM 20 reads this and adds a value corresponding to the voltage drop of the acquired voltage based on the driving of the starter 13 from the boosting amount according to the acquired voltage.
  • the voltage drop of the lithium ion storage battery 12 based on the drive of the starter 13 changes similarly to the lead storage battery 11 according to the time from the drive start of the starter 13.
  • FIG. 9 it is desirable that the value corresponding to the voltage drop to be added is also changed according to the time from the start of driving of the starter 13 from the boosting amount corresponding to the acquired voltage.
  • the voltage can be boosted to an appropriate voltage and applied to the blower motor 14.
  • the BCM 20 determines that the standby time according to the polarization state of the lithium ion storage battery 12 has elapsed from the time when it is determined that the restart is completed (time T52) (time T53). It is decided to end the change in boost amount).
  • the BCM 20 is configured such that the output voltage of the booster circuit 30 is higher than the output voltage of the booster circuit 30 in the case where the boost control is performed by the boost amount determined according to the acquired voltage. Change the boost amount. That is, the BCM 20 is changed to increase the boost amount determined in accordance with the acquired voltage.
  • the BCM 20 adds a value corresponding to the voltage drop based on the polarization based on the prediction that the voltage of the lithium ion storage battery 12 decreases due to the polarization from the boosting amount according to the acquired voltage, and then changes The amount of pressure boost is determined.
  • the starter 13 Since the starter 13 is driven by being supplied with power from the lithium ion storage battery 12, the voltage of the lithium ion storage battery 12 applying a voltage to the boosting circuit 30 is reduced based on the driving of the starter 13.
  • the switch SW1 when the starter 13 is driven, the switch SW1 is opened, so the acquired voltage (the voltage of the lead storage battery 11) does not decrease.
  • the applied voltage the voltage of the lithium ion storage battery 12
  • the voltage of the lithium ion storage battery 12 is lowered. Becomes smaller than the required voltage.
  • the BCM 20 is changed to the side of increasing the boosting amount determined according to the acquired voltage. Specifically, the BCM 20 adds a value corresponding to the voltage drop of the lithium ion storage battery 12 to the boost amount determined in accordance with the acquired voltage. Thus, the voltage can be boosted to an appropriate voltage and applied to the blower motor 14.
  • the electrical load 15 may be a general electrical load other than the constant voltage required load.
  • the general electrical load include a seat heater, a heater for a rear window defroster, a headlight, a wiper for a front window, a blower fan for an air conditioner, and the like.
  • these electrical loads may be connected to the external terminals P1 and P2 separately from the electrical load 15.
  • the required voltage of the blower motor 14 may be variable.
  • the BCM 20 receives a signal indicating the required voltage from the blower motor 14 and changes the boosting amount accordingly.
  • the estimation may not be performed.
  • the change of the pressure increase amount may be started when the restart condition is satisfied. Further, when the restart is completed, the change of the pressure increase amount may be ended.
  • an integrated starter generator having a power generation function and a power running function may be employed as the starter.
  • blower motor 14 is adopted as the electric load to which the output voltage from the booster circuit is supplied in the above embodiment, an electric load other than the blower motor 14 may be adopted.
  • an ignition coil may be employed.
  • the voltage detection circuit 21a the voltage acquisition unit 21, the boost control unit 22, the restart determination unit 23, the estimation unit 24, and the completion determination unit 25 included in the BCM 20
  • the function may be provided in another control device, for example, an engine ECU, an idling stop ECU, and the like.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Direct Current Feeding And Distribution (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
  • Dc-Dc Converters (AREA)

Abstract

Dispositif de commande d'alimentation électrique (20) appliqué dans un système d'alimentation électrique monté sur véhicule (100) et comprenant : une unité d'acquisition de tension (21) qui acquiert une tension d'une première batterie de stockage (11) ; une unité de commande d'amplification (22) qui détermine une quantité d'amplification par rapport à une tension appliquée dans un circuit d'amplification (30) en fonction de la tension d'acquisition, et met en œuvre une commande d'amplification pour le circuit d'amplification à l'aide de la quantité d'amplification ; et une unité de détermination de redémarrage (23) qui détermine que le redémarrage d'un moteur à combustion interne (200) est effectué à l'aide d'un démarreur (13). Un commutateur, au moins pendant le redémarrage, est commuté vers un état d'arrêt d'alimentation. L'unité de commande d'amplification, s'il est déterminé par l'unité de détermination de redémarrage que le redémarrage du moteur à combustion interne est effectué, change la quantité d'amplification qui est déterminée en fonction de la tension acquise, et met en œuvre la commande d'amplification sur la base de la quantité d'amplification après le changement.
PCT/JP2018/033783 2017-09-29 2018-09-12 Dispositif de commande d'alimentation électrique WO2019065236A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009142089A (ja) * 2007-12-07 2009-06-25 Toyota Motor Corp 車両用電源装置
JP4978734B2 (ja) * 2009-11-12 2012-07-18 トヨタ自動車株式会社 昇圧制御装置及びこれを用いるアイドリングストップシステム
JP2016164015A (ja) * 2015-03-06 2016-09-08 株式会社デンソー 電源システム
WO2018012471A1 (fr) * 2016-07-11 2018-01-18 株式会社デンソー Dispositif de commande d'alimentation électrique et système d'alimentation électrique

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Publication number Priority date Publication date Assignee Title
JP2010028881A (ja) * 2008-07-15 2010-02-04 Fujitsu Ten Ltd 制御装置、及び制御方法
JP5691919B2 (ja) * 2011-07-29 2015-04-01 株式会社デンソー 車両用電力制御装置
JP6309039B2 (ja) 2016-04-12 2018-04-11 ムサシノ機器株式会社 伝搬モードトランスデューサ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009142089A (ja) * 2007-12-07 2009-06-25 Toyota Motor Corp 車両用電源装置
JP4978734B2 (ja) * 2009-11-12 2012-07-18 トヨタ自動車株式会社 昇圧制御装置及びこれを用いるアイドリングストップシステム
JP2016164015A (ja) * 2015-03-06 2016-09-08 株式会社デンソー 電源システム
WO2018012471A1 (fr) * 2016-07-11 2018-01-18 株式会社デンソー Dispositif de commande d'alimentation électrique et système d'alimentation électrique

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