WO2006033163A1 - 負荷駆動回路における異常監視装置および異常監視方法 - Google Patents
負荷駆動回路における異常監視装置および異常監視方法 Download PDFInfo
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- WO2006033163A1 WO2006033163A1 PCT/JP2004/014319 JP2004014319W WO2006033163A1 WO 2006033163 A1 WO2006033163 A1 WO 2006033163A1 JP 2004014319 W JP2004014319 W JP 2004014319W WO 2006033163 A1 WO2006033163 A1 WO 2006033163A1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/48—Arrangements for obtaining a constant output value at varying speed of the generator, e.g. on vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
- B60K6/48—Parallel type
- B60K6/485—Motor-assist type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0038—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to sensors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2210/00—Converter types
- B60L2210/10—DC to DC converters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/24—Energy storage means
- B60W2510/242—Energy storage means for electrical energy
- B60W2510/244—Charge state
-
- 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
- H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
- H02J7/1423—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle with multiple batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/45—Special adaptation of control arrangements for generators for motor vehicles, e.g. car alternators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Definitions
- the present invention relates to an electric circuit for driving a load mounted on a vehicle, and more particularly, to an apparatus and a method for monitoring a sensor abnormality in the load driving circuit.
- a 14 V battery means a battery with a charge voltage of 14 V and a discharge voltage of 12 V.
- the 42V battery means a battery with a charge voltage of 42V and a discharge voltage of 36V.
- Japanese Laid-Open Patent Publication No. Hei 8-2 1 4 5 9 2 (Reference 1) can realize motor driving, regenerative braking, and battery charging with a simple configuration, and can also perform battery refreshing.
- a motor drive device is disclosed. This motor drive device has one or more arms made by connecting two switching elements with flywheel diodes in series, the input terminal is connected to the battery, and the output terminal is connected to the motor.
- a drive circuit that is connected to control the energization of the motor by turning on and off the switching element; a chopper circuit that is formed by connecting two switching elements having flywheel diodes connected in parallel to the drive circuit; and
- the DC side reactor connected between the neutral point of the circuit and the battery, and the switching elements of the drive circuit and chopper circuit are provided to turn on and off, and the chopper circuit supplies power from the battery to the drive circuit. It can be used as a step-up chopper when the power is supplied, and when power is supplied from the drive circuit to the battery, the voltage is stepped down.
- a control circuit capable acting as a Chiyoppa.
- the control circuit supplies the reference voltage of the battery to the drive circuit when the motor output is low, and controls the chopper circuit to act as a boosting chopper when the motor output is high.
- the chopper circuit when power is supplied from the battery to the motor via the drive circuit, the chopper circuit can act as a boost chopper, so that a voltage higher than the battery voltage is applied to the motor. Therefore, the motor can be driven at a higher rotation speed than in a steady state.
- the chopper circuit when power is supplied from the drive circuit to the battery, the chopper circuit can act as a step-down chipper. Therefore, when the motor is regeneratively braked or when the battery is charged from an external power supply, the motor generated voltage or external power supply Even if the voltage is higher than the battery voltage, the battery can be charged without damaging the circuit elements. Further, Japanese Patent Laid-Open No.
- Patent Document 2 discloses a control method that estimates a battery voltage that allows control to be continued even when an abnormality or the like occurs in a voltage sensor.
- This control method obtains the motor next voltage based on the battery voltage and the previous switching pattern, estimates the current values of the motor next magnetic flux and motor torque based on the motor next voltage and motor primary current, and outputs the required output. Based on this, the command values for the motor next flux and motor torque are calculated, and the current values of the estimated motor next flux and motor torque are compared with the command values for the calculated motor next flux and motor torque to determine the switching pattern.
- the battery voltage is normally detected by the voltage sensor, and when the output of the voltage sensor is abnormal, the battery Estimate the battery voltage based on the load condition.
- the An estimate of the voltage is used. Therefore, it is possible to continue control based on the high-speed direct torque control theory even when the output of the voltage sensor is irregular. Even if the estimated battery voltage includes an error, an unstable control state will not occur unless the error is extremely large. Since the battery voltage is estimated based on the load state of the battery, a large error does not occur in the estimated value, and stable control is realized over a wide range.
- a chopper circuit is provided in parallel with the inverter circuit, the chopper circuit acts as a boost chopper when the motor output is high, and the chopper when the motor is regenerated.
- the circuit operates as a step-down chopper, if a voltage sensor abnormality occurs during such voltage adjustment, accurate voltage control is not performed, which may degrade the battery.
- boosting simply comparing the voltage value detected by the output voltage sensor (after boosting) of the DCZDC converter with the voltage sensor of the battery, which voltage sensor is abnormal? do not know.
- the battery voltage sensor is not based on a configuration having a DC / DC converter, but simply based on the relationship between the battery voltage and the battery output. It is only determined that the sensor is abnormal, and in such a case, the estimated battery voltage is used to control the induction motor. The abnormality of the battery voltage sensor is detected only when the map deviates from the relationship between the battery output and the battery voltage.
- An object of the present invention is to provide an abnormality monitoring device for a load driving circuit, which monitors an abnormality of a sensor for detecting a voltage of each part in a load driving circuit having a converter and a battery for supplying electric power to the load. It is to provide an anomaly monitoring method.
- An abnormality monitoring apparatus includes a converter that performs at least one of a step-up operation and a step-down operation, and a battery connected to an input side of the converter, and supplies power from the converter to a load.
- This is an abnormality monitoring device for the load drive circuit to be supplied.
- the abnormality monitoring device includes a battery voltage sensor that detects a voltage value of the battery, an output-side voltage sensor that detects a voltage value on the output side of the converter, a battery voltage estimation calculation process that calculates an estimated voltage value of the battery,
- a temporary abnormality of the battery voltage sensor is detected based on the absolute value of the difference between the battery voltage value detected by the battery voltage sensor and the estimated voltage value.
- An electronic control unit that executes processing for detecting a temporary abnormality of the output sensor based on the absolute value of the difference between the output voltage value of the converter detected by the output sensor and the voltage command value to the converter. Including.
- this abnormality monitoring device when the converter is performing a step-up operation or a step-down operation, at least whether the two voltage sensors are normal is detected, and if a possibility of abnormality is detected, a temporary abnormality is detected.
- the electronic control unit has a battery detected by a battery voltage sensor.
- the battery voltage sensor When the absolute value of the difference between the battery voltage value and the estimated voltage value is greater than or equal to a predetermined threshold value, the battery voltage sensor is detected to be temporarily abnormal, and the output side voltage sensor detects it.
- the absolute value of the difference between the voltage value on the output side of the converter and the voltage command value to the converter is equal to or greater than a predetermined threshold value, a process for detecting a temporary abnormality of the output side voltage sensor is performed. Execute.
- the battery voltage sensor is based on the difference between the detected voltage value and the estimated voltage value
- the output side voltage sensor is based on the difference between the detected voltage value and the voltage command value. Can be detected while the converter is operating.
- the electronic control unit has a predetermined absolute value of the difference between the battery voltage value detected by the battery voltage sensor and the estimated voltage value!
- the process for detecting that the battery voltage sensor is temporarily abnormal the voltage value on the output side of the converter detected by the output side voltage sensor, and A process for detecting that the output side voltage sensor is temporarily abnormal when the absolute value of the difference from the voltage command value to the converter is equal to or greater than a predetermined threshold value.
- the battery voltage sensor detects the absolute difference between the detected voltage value and the voltage command value based on the time when the absolute value of the difference between the detected voltage value and the estimated voltage value is large. Great value! / Based on the time, each temporary abnormality can be accurately detected even while the converter is operating.
- the electronic control unit preferably detects the voltage value of the battery detected by the battery voltage sensor. Is further executed to identify an abnormal sensor among the sensors based on the absolute value of the difference between the output voltage value of the converter detected by the output side voltage sensor and the tolerance of each sensor. .
- the voltage value detected by the battery voltage sensor and the voltage value detected by the output side voltage sensor It should show almost the same value. Nevertheless, not showing the same value indicates that at least one of the sensors is abnormal. Based on whether or not each sensor is out of tolerance, the abnormal sensor in the two sensors Can be identified.
- the electronic control unit is configured such that an absolute value of a difference between a battery voltage value detected by the battery voltage sensor and a voltage value on the output side of the converter detected by the output side voltage sensor is a predetermined threshold value. If this is the case, a process is performed to determine that one of the sensors is abnormal. When the voltage value detected by the battery voltage sensor is outside the tolerance range of the battery voltage sensor, the electronic control unit executes a process of specifying that the battery voltage sensor is an abnormal sensor. When the voltage value on the output side of the converter detected by the output side voltage sensor is outside the tolerance range of the output side voltage sensor, the electronic control unit performs processing to identify that the output side voltage sensor is an abnormal sensor. Execute.
- the battery voltage sensor can be identified as an abnormal sensor. Further, it can be identified that the output side voltage sensor is an abnormal sensor.
- the electronic control unit is configured such that the absolute value of the difference between the battery voltage value detected by the battery voltage sensor and the output voltage value detected by the output side voltage sensor is a predetermined threshold value.
- the voltage value detected by the battery voltage sensor is not outside the tolerance range of the battery voltage sensor, and the voltage value on the output side of the converter detected by the output side voltage sensor is the tolerance of the output side voltage sensor. If it is not out of range, the converter is controlled to start the buck-boost operation by the converter.
- the electronic control unit detects a temporary abnormality of the battery voltage sensor, the electronic control unit executes a process of specifying that the battery voltage sensor is abnormal. If the electronic control unit does not detect a temporary abnormality of the battery voltage sensor, the electronic control unit executes a process of specifying that the output side voltage sensor is abnormal.
- the voltage value detected by the battery voltage sensor and the voltage value detected by the output side voltage sensor are as follows. It should show almost the same value. Nevertheless, if they do not show the same value, an abnormal sensor can be identified by whether or not a temporary abnormality is detected by operating the converter.
- the electronic control unit detects a temporary abnormality of the sensor during the buck-boost operation, and stops the boost-boost operation by the converter.
- the absolute value of the difference between the battery voltage value detected by the battery voltage sensor and the output voltage value of the converter detected by the output side voltage sensor is equal to or greater than a predetermined threshold value.
- a process of specifying that the battery voltage sensor is abnormal is further executed.
- the electronic control unit determines whether the absolute value of the difference between the battery voltage value detected by the battery voltage sensor and the output voltage value of the converter detected by the output side voltage sensor is not more than a predetermined threshold. Executes the process to specify that the battery voltage sensor and the output side voltage sensor are not temporarily abnormal.
- the abnormality monitoring device when the converter detects a temporary abnormality during the step-up / step-down operation and the converter's step-up / high-pressure operation is stopped, the abnormality sensor is specified and it is determined that it is not a temporary abnormality. Can do.
- An abnormality monitoring method includes a converter that performs at least one of a step-up operation and a step-down operation, a battery connected to the input side of the converter, and a battery that detects a voltage value of the battery.
- This abnormality monitoring method includes a battery voltage estimation calculation step for calculating an estimated voltage value of the battery, and a battery voltage value and an estimated voltage value detected by the battery voltage sensor when the converter is performing a step-up operation or a step-down operation.
- FIG. 1 is a control block diagram of a vehicle including an abnormality monitoring apparatus according to an embodiment of the present invention.
- FIG. 2 is a partially enlarged view of FIG.
- FIG. 3 is a flowchart (part 1) showing the control structure of the program executed by the ECU shown in FIG.
- FIG. 4 is a flowchart (part 2) showing the control structure of the program executed by the ECU of FIG.
- Fig. 5 is a flowchart (No. 3) showing the control structure of the program executed by ECU in Fig. 1.
- a power supply system mounted on a vehicle has two batteries: a 14 V battery as a first battery and a 4 2 V battery as a second battery.
- the present invention is not limited to a power supply system equipped with two kinds of batteries having different voltages.
- the motor and the motor generator functioning as a motor to assist the engine, or functioning as a generator when regenerative braking is performed to collect energy and charge the battery.
- a so-called hybrid vehicle will be described, but the present invention is not limited to such a hybrid vehicle.
- the present invention is applied to a system including a D CZD C converter, at least one battery connected to the input side of the DCDC converter, and a load such as an inverter connected to the output side of the DC / DC converter.
- a load such as an inverter connected to the output side of the DC / DC converter.
- the voltage sensor that detects the voltage value of the battery and the voltage sensor that detects the voltage value on the output side (load side) of the DC / DC converter are monitored, and there is an abnormality in these voltage sensors. It monitors whether or not it has occurred.
- FIG. 1 shows a control block diagram of a vehicle including ECU 1 00 0 0 constituting the abnormality monitoring apparatus according to the present embodiment.
- the vehicle includes an engine 1 0 0, a motor generator 2 0 0 that functions as a motor and assists the engine 1 0 0, and an inverter 3 that supplies electric power to the motor generator 2 0 0 0, and a DCZDC converter 4OO which performs at least one of step-up and step-down of the voltage of the battery in order to supply power of a predetermined voltage value to a load such as the inverter 300.
- the DCZC C converter 400 has a first battery 60 00 (here, the first battery 60 00 is assumed to be a 14 V system battery, but is not limited to this), and a system main relay It is connected to a second battery 7 0 0 (here, the second battery is assumed to be a 4 2 V system battery, but is not limited to this) via a 5 0 0 and a fuse 5 5 0.
- the D C / D C converter 400 can boost the electric power discharged from the first battery 60 0 and the second battery 70 0 to the rated voltage of the inverter 300.
- the first battery 6 0 0 is a traveling battery, and for example, a DC / DC converter 4 0 0 is used as a nickel hydrogen battery of 2 0 to 3 0 0 [V].
- a description will be given of a converter that boosts the voltage of the first battery 60 0 to about 5 0 0 [V].
- the crankshaft pulley 1 2 0 of the engine 1 0 0 is connected to the motor generator pulley 1 3 0 via the electromagnetic clutch 1 1 0 via the base 1 4 0, and the motor generator 2 0 0 is connected to the inverter 3 0
- the motor generator 200 functions as a generator to regenerate the driving power from the drive wheels connected to the crankshaft of the engine 100 so that the travel energy Is converted into electric energy and the battery is charged.
- ECU 1 0 0 0 consists of an inverter 3 0 0, DC / DC converter 4 0 0 and It is connected to the stem main relay 500 and sends control signals to each device.
- the control signal lines are indicated by dotted lines.
- the engine 100 is controlled by an engine ECU (not shown).
- the vehicle shown in Fig. 1 is equipped with an idling stop system that automatically stops the engine 100 when the vehicle stops due to a red light, etc., and controls the power to the auxiliary machine using the second battery 700. It is.
- the present invention is not limited to a vehicle equipped with such an idling stop system. It may be a vehicle that uses an engine and a motor, which are commonly referred to as hybrid vehicles, as the drive source of the vehicle, or does not have a motor generator that assists the engine 100, but has a battery 600, a DC / DC converter 400, and a DCZDC. It may be a load driving circuit only including a load connected to the converter 400 and an ECU for controlling them.
- FIG. 2 shows a partially enlarged view of Figure 1.
- DC / DC converter 400 includes an output side voltage sensor 420 (hereinafter also referred to as VH sensor 420), a booster circuit 430, and a switching circuit 440.
- the DC / DC converter 400 is characterized by not having the input side voltage sensor of the DC / DC converter 400.
- the switching circuit 440 controls the booster circuit 430 of the DC / DC converter based on the control signal transmitted from the ECU 1000, boosts the voltage of the first battery 600 to a predetermined voltage, and supplies the booster 300 with the booster circuit 430.
- the output side voltage sensor 420 is connected to the output side circuit of the DC / DC converter 400, detects the boosted voltage VH, and transmits it to the ECU 1000.
- the output side voltage sensor 420 may be provided outside the DCZDC converter 400.
- a battery voltage sensor 610 (hereinafter also referred to as VB sensor 610) and a battery current sensor 620 for detecting the battery voltage VB of the first battery 600 are connected to the first battery 600. Is provided.
- the battery voltage VB detected by the battery voltage sensor 610 and the battery current IB detected by the battery current sensor 620 are transmitted to the ECU 1000.
- the ECU 1000 has a battery voltage VB and After-boost voltage VH is input. Based on these input voltage values, the estimated battery voltage VB estimate, and the voltage command value VH, which is the command value to DCZDC converter 400, ECU 1000 detects which voltage sensor is abnormal. Whether the DCZDC converter 400 is operating or not is monitored for abnormalities in the voltage sensor.
- ECU 1000 determines whether VB sensor 610 has no temporary abnormality and VH sensor 420 has no temporary abnormality. Details of this temporary abnormality will be described later. If VB sensor 610 has no temporary abnormality and VH sensor 420 has no temporary abnormality (YES in S100), the process proceeds to S1 1 °. If not (NO at S100), the process proceeds to S300 in Figure 4.
- ECU 1000 determines whether or not DCZDC converter 400 is in a pressure control state. If DC / DC converter 400 is under boost control (YES in S110), the process proceeds to S120. If not (NO in S110), the process proceeds to S200.
- ECU 1000 calculates an estimated VB value that is an estimated voltage value of battery 600.
- ECU 1000 has a signal representing battery voltage VB transmitted from VB sensor 610, a signal representing boosted voltage VH transmitted from VH sensor 420, and a signal representing battery current IB transmitted from battery current sensor 620. Have been entered.
- the ECU 1000 calculates a VB estimated value that is a current battery estimated voltage value as (command power / battery current IB). This command power is the power required to generate the drive torque required to drive the vehicle based on the running state of the vehicle, and is a command value of power calculated by the ECU 1000. is there.
- ECU 1000 determines whether or not the state where I VB estimated value is equal to VB I voltage threshold value X continues for a predetermined time. I VB estimated value 1 VB I ⁇ Voltage threshold X If a state continues for a predetermined time (S 1 At 30 YE S), processing proceeds to S 140. If not (NO at S 130), the process proceeds to S 150. In S 140, ECU 1000 determines that VB sensor 610 is a temporary abnormality.
- S 150 ECU 1000 determines whether or not the state of I VH voltage command value equal to VH
- the voltage threshold X and the voltage threshold Z are, for example, 50 [V], and the predetermined time is, for example, 1 [sec]. Such values are merely examples and are not limited.
- ECU 1000 determines whether or not I VB—VH I ⁇ voltage threshold Y. If I VB—VH I ⁇ voltage threshold Y ( ⁇ S at 3200), the process proceeds to S 210. If not (1 ⁇ 0 at 3200), processing moves to S230.
- the voltage threshold Y is, for example, 70 [V]. Further, assuming that the predetermined time is, for example, 500 [ms ec], it is determined whether or not the force that VB—VH I ⁇ voltage threshold Y continues for a predetermined time. Also good. Such values are merely examples and are not limited.
- ECU 1000 determines whether or not the VB value is outside the tolerance range of VB sensor 610. If the VB value is outside the tolerance range of VB sensor 610 (YES at S210), the process proceeds to S240. If not (NO in S210), the process proceeds to S220.
- ECU 1000 determines whether or not the VH value is outside the tolerance range of VH sensor 420. If the VH value is outside the tolerance range of VH sensor 420 (YES at S2 20), the process proceeds to S250. If not (NO in S220), the process proceeds to S400 in FIG.
- ECU1000 is VB sensor 610 and VH sensor 420 Is determined to be normal.
- ECU 1000 determines that VB sensor 610 is abnormal.
- S250 ECU 1000 determines that VH sensor 420 is abnormal.
- ECU 1000 stops the boost control of DC / DC converter 400.
- ECU 1000 determines whether or not I VB—VH I ⁇ voltage threshold Y. If I VB—VH I ⁇ voltage threshold Y (YES in S310), the process proceeds to S320. If not (NO in S 310), the process proceeds to S 330.
- the voltage threshold Y is, for example, 70 [V]. Further, assuming that the predetermined time is, for example, 500 [ms ec], it is determined whether or not the force that VB—VH I ⁇ voltage threshold Y continues for a predetermined time. Also good. Such values are merely examples and are not limited.
- ECU1000 determines that VB sensor 610 is abnormal when S100 determines that V ⁇ sensor temporary abnormality is present, and S100 determines that VH sensor temporary abnormality is present. Confirm that the VH sensor 420 is abnormal.
- S330 ECU 1000 determines that VB sensor 610 has no temporary abnormality and VH sensor 420 has no temporary abnormality. After the processing of S320 and S330, this processing ends.
- ECU 1000 starts the boost control of DC converter DC converter 400.
- ECU 1000 executes a temporary abnormality detection routine.
- the temporary abnormality detection routine refers to the processing from S120 to S160 described above.
- ECU 1000 determines whether or not VB sensor 610 is determined to be a temporary abnormality. If VB sensor 610 is determined to be temporarily abnormal (YES in S420), the process proceeds to S430. If not (NO in S 42 0), the process proceeds to S 440.
- ECU 1000 determines that VB sensor 610 is abnormal. In S 440, ECU 1000 determines that VH sensor 420 is abnormal. After the processing of S430 and S440, this processing ends.
- abnormality determination processing is executed at a predetermined sampling time (for example, a sampling time determined by a clock frequency of a CPU (Central Processing Unit) included in the ECU 1 000).
- a predetermined sampling time for example, a sampling time determined by a clock frequency of a CPU (Central Processing Unit) included in the ECU 1 000.
- the VB sensor 610 is not out of the range of values that can be taken by design (outside the tolerance range) (NO in S210), but is outside the range of values that can be taken by the VH sensor 420 (outside the tolerance range) (YES in S220), it is determined that the VH sensor 420 is abnormal (S250).
- VB sensor 610 is not out of the range of values that can be taken by design (outside the tolerance range) (NO in S210), and must be outside the range of values that can be taken by VH sensor 420 (outside the tolerance range) ( NO in S220), it can be determined that these sensor abnormalities are not fatal. Therefore, the DC / DC converter 400 is boosted (S 400), the temporary abnormality detection routine is executed (S 410), and it is determined that the VB sensor 6 10 has a temporary abnormality (in S 420). YES), VB sensor 610 is determined to be abnormal (S 430). If VB sensor 610 is not determined to be temporarily abnormal (NO in S420), it is determined that VH sensor 420 is abnormal (S440).
- an estimated VB value that is an estimated voltage value of battery 600 is calculated (S120).
- the absolute value of the difference between the battery voltage value VB detected by the VB sensor 610 and the estimated VB value I VB estimated value 1 VB I is calculated, and this I VB estimated value 1 VB I is greater than or equal to the voltage threshold X If the time continues for a predetermined time (YES in S130), it is determined that VB sensor 610 is temporarily abnormal (S140).
- the VH voltage command that is the command value to the DCZDC converter 400
- the absolute value I of the difference between the value and the boosted voltage value VH detected by the VH sensor 420 I VH voltage command value 1 VHI is calculated. If this 1 VH voltage command value VH I is equal to or greater than the voltage threshold value Z continues for a predetermined time (YES in S 150), it is determined that the VH sensor 420 is temporarily abnormal (S 16 0).
- I VB estimated value 1 VB is equal to or greater than voltage threshold value X
- I VH voltage command value 1 VH i is equal to the voltage threshold. If the time equal to or greater than the value Z does not continue for a predetermined time (NO in S 150), it is not determined that any sensor is a temporary abnormality.
- step-up control of DCZDC converter 400 is stopped (S300).
- the absolute value I VB-VH I of the difference between the battery voltage value VB detected by the VB sensor 610 and the VH sensor 420 and the boosted voltage value VH is calculated when the DC / DC converter 400 is not boost controlled. If this I VB-VH
- the abnormality of the V B sensor 6 10 and the post-boost sensor 4 2 0 can be accurately detected even if the DCZC C converter 4 0 0 is in the boosting operation. If no sensor abnormality is detected in this way, the following problems occur.
- the SOC States Of Charge
- the boost control is not accurately performed. If the voltage is too high, the electrical elements of the drive circuit will be damaged, and if the voltage is too low, the required voltage cannot be obtained, so the necessary driving force cannot be obtained. However, such a problem does not occur when the abnormality of the VH sensor 420 that detects the voltage after the boosting of the DCZDC converter 400 is accurately monitored as in the present embodiment.
- the detected battery voltage VB and the estimated VB value are used for the VB sensor.
- a temporary abnormality of the VH sensor is detected using the boosted voltage value VH and the VH voltage command value, which are the detected boosted voltages.
- the DC CZD C converter boost control is stopped and the sensor abnormality is detected by the absolute value of the difference between the notch voltage value VB and the boosted voltage value VH. can do.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Sustainable Energy (AREA)
- Combustion & Propulsion (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Dc-Dc Converters (AREA)
- Secondary Cells (AREA)
- Protection Of Static Devices (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/592,107 US7586311B2 (en) | 2004-09-22 | 2004-09-22 | Apparatus and method for monitoring load driving circuit for abnormality |
DE112004002939.2T DE112004002939B4 (de) | 2004-09-22 | 2004-09-22 | Gerät und Verfahren zur Überwachung einer Lastansteuerungsschaltung bezüglich einer Anomalie |
CN2004800434236A CN1973415B (zh) | 2004-09-22 | 2004-09-22 | 监视负载驱动电路异常的设备和方法 |
JP2006536296A JP4386075B2 (ja) | 2004-09-22 | 2004-09-22 | 負荷駆動回路における異常監視装置および異常監視方法 |
PCT/JP2004/014319 WO2006033163A1 (ja) | 2004-09-22 | 2004-09-22 | 負荷駆動回路における異常監視装置および異常監視方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2004/014319 WO2006033163A1 (ja) | 2004-09-22 | 2004-09-22 | 負荷駆動回路における異常監視装置および異常監視方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006033163A1 true WO2006033163A1 (ja) | 2006-03-30 |
Family
ID=36089930
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/014319 WO2006033163A1 (ja) | 2004-09-22 | 2004-09-22 | 負荷駆動回路における異常監視装置および異常監視方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7586311B2 (ja) |
JP (1) | JP4386075B2 (ja) |
CN (1) | CN1973415B (ja) |
DE (1) | DE112004002939B4 (ja) |
WO (1) | WO2006033163A1 (ja) |
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US9318901B2 (en) | 2012-11-30 | 2016-04-19 | Tesla Motors, Inc. | Response to detection of an overdischarge event in a series connected battery element |
US9153990B2 (en) | 2012-11-30 | 2015-10-06 | Tesla Motors, Inc. | Steady state detection of an exceptional charge event in a series connected battery element |
US9343911B2 (en) * | 2012-11-30 | 2016-05-17 | Tesla Motors, Inc. | Response to detection of an overcharge event in a series connected battery element |
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JP2014204571A (ja) * | 2013-04-05 | 2014-10-27 | 株式会社マキタ | 電動機器システム及びバッテリパック |
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- 2004-09-22 DE DE112004002939.2T patent/DE112004002939B4/de not_active Expired - Fee Related
- 2004-09-22 WO PCT/JP2004/014319 patent/WO2006033163A1/ja active Application Filing
- 2004-09-22 CN CN2004800434236A patent/CN1973415B/zh not_active Expired - Fee Related
- 2004-09-22 JP JP2006536296A patent/JP4386075B2/ja not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
---|---|
CN1973415B (zh) | 2010-06-23 |
JP4386075B2 (ja) | 2009-12-16 |
US20070223259A1 (en) | 2007-09-27 |
CN1973415A (zh) | 2007-05-30 |
US7586311B2 (en) | 2009-09-08 |
DE112004002939B4 (de) | 2020-09-03 |
JPWO2006033163A1 (ja) | 2008-05-15 |
DE112004002939T5 (de) | 2007-06-28 |
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