WO2018126634A1 - Procédé et dispositif de détection d'un commutateur de charge d'un véhicule électrique - Google Patents

Procédé et dispositif de détection d'un commutateur de charge d'un véhicule électrique Download PDF

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Publication number
WO2018126634A1
WO2018126634A1 PCT/CN2017/092322 CN2017092322W WO2018126634A1 WO 2018126634 A1 WO2018126634 A1 WO 2018126634A1 CN 2017092322 W CN2017092322 W CN 2017092322W WO 2018126634 A1 WO2018126634 A1 WO 2018126634A1
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WIPO (PCT)
Prior art keywords
charging
electrical connection
state
vehicle
electric vehicle
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PCT/CN2017/092322
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English (en)
Chinese (zh)
Inventor
王嵩飞
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宁德时代新能源科技股份有限公司
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Publication of WO2018126634A1 publication Critical patent/WO2018126634A1/fr

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    • 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
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
    • G01R19/2506—Arrangements for conditioning or analysing measured signals, e.g. for indicating peak values ; Details concerning sampling, digitizing or waveform capturing
    • G01R19/2509—Details concerning sampling, digitizing or waveform capturing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • 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
    • 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
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • the invention belongs to the technical field of electric vehicles, and more particularly to a method and a device for detecting an electric vehicle charging switch.
  • the charging method of the existing electric vehicle is mainly AC charging, and the electric vehicle can be directly connected to the power grid through a charging pile or a charging socket.
  • AC charging uses a lower current to charge the vehicle's power battery.
  • the charging time is usually more than 3 hours, also called slow charging. In this way, the charging current and power are both low, the impact on the battery life and the impact on the power grid are small, and the power trough can be fully utilized to reduce the cost.
  • AC charging is a simple, convenient, and practical way to charge.
  • a guiding circuit specified in GB/T 18487.1-2015 is shown in Figure 1.
  • the circuit consists of L1, L2, L3, N phase power lines, power supply control device 4, contactors K1 and K2, resistors R1, R2, R3, R4, RC, diode D1, switches S1, S2, S3, and car charger 1
  • the vehicle control device 2 and the residual current protection device 5 are composed.
  • the national standard stipulates that the switch S2 is the internal charging switch of the vehicle.
  • the existing AC charging method has the following problems:
  • the vehicle Since there is no CAN communication between the AC charging post and the vehicle, the vehicle informs the charging pile whether the current vehicle is ready to be charged by the on/off of the internal switch S2.
  • the existing AC charging method does not detect the fault of the vehicle internal charging switch S2. Therefore, if the vehicle is not ready and does not satisfy the charging condition, and at this time, the S2 is in a normally closed fault, the charging pile may be erroneously notified that the charging pile is currently available. Charging, causing a safety hazard or damage to the vehicle.
  • the present invention provides an electric vehicle charging switch detecting method, the electric vehicle including an in-vehicle charger, a vehicle control device, and a charging interface, and the in-vehicle charger passes the vehicle internal charging switch and the charging
  • the control guide wire of the interface is electrically connected
  • the vehicle control device is electrically connected to the electrical connection confirmation line and the control guide line of the charging interface, respectively.
  • the charging state includes an offline state indicating that the charging interface is not electrically connected to the external power supply device, indicating that the charging interface is electrically connected to the external power supply device, but the vehicle is internally charged.
  • the electrical connection state in which the switch is open, the on-line state indicating that the charging interface is electrically connected to the external power supply device and the internal charging switch of the vehicle is closed.
  • the determining the current charging state of the electric vehicle specifically includes:
  • the current charging state is an electrical connection state, and the amplitude is lower than a preset electrical connection abnormal threshold, determining a fault
  • the current charging state is an online state, and the amplitude is higher than a preset charging abnormal threshold, determining a fault
  • the charging abnormality threshold is greater than the electrical connection abnormality threshold.
  • the acquiring the amplitude of the pulse width modulation signal on the control guide line includes:
  • the present invention provides an electric vehicle charging switch detecting device, which includes an in-vehicle charger, a vehicle control device, and a charging interface, and the in-vehicle charger passes the vehicle internal charging switch and the charging
  • the control guide wire of the interface is electrically connected
  • the vehicle control device is electrically connected to the electrical connection confirmation line of the charging interface and the control guide wire
  • the detecting device comprises:
  • a status confirmation module configured to: determine a current state of charge of the electric vehicle
  • An amplitude obtaining module configured to: acquire a magnitude of a pulse width modulation signal on the control guide line;
  • the fault alarm module is configured to: if the amplitude does not match the current charging state, determine a fault and alarm.
  • the charging state includes an offline state indicating that the charging interface is not electrically connected to the external power supply device, indicating that the charging interface is electrically connected to the external power supply device, but the vehicle is internally charged.
  • the electrical connection state in which the switch is open, the on-line state indicating that the charging interface is electrically connected to the external power supply device and the internal charging switch of the vehicle is closed.
  • the status confirming module is specifically configured to:
  • the fault alarm module is specifically configured to:
  • the current charging state is an electrical connection state, and the amplitude is lower than a preset electrical connection abnormal threshold, determining a fault
  • the current charging state is an online state, and the amplitude is higher than a preset charging abnormal threshold, determining a fault
  • the charging abnormality threshold is greater than the electrical connection abnormality threshold.
  • the amplitude obtaining mode Block specifically for:
  • the amplitude acquiring module specifically includes: an input terminal electrically connected to the control guiding line, a first diode, and a second diode , a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a capacitor, a single chip microcomputer;
  • the input ends are respectively electrically connected to the anode of the first diode and the anode of the second diode;
  • the negative pole of the first diode is electrically connected to the first resistor, the third resistor, and the analog sampling end of the single chip, and the connection point of the first resistor and the third resistor is grounded via the second resistor, and the third resistor and the modulus of the single chip microcomputer The connection point of the sampling end is grounded via a capacitor;
  • the negative pole of the second diode is electrically connected to the sampling end of the fourth resistor and the pulse width modulation signal of the single chip, and the connection point of the negative pole of the second diode and the fourth resistor is grounded via the fifth resistor;
  • a single chip microcomputer configured to obtain an effective voltage of a pulse width modulation signal on the control guide line from an analog sampling end, and obtain a duty ratio of a pulse width modulation signal on the control guide line from a sampling end of the pulse width modulation signal And calculating, according to the duty ratio and the effective voltage, the amplitude of the pulse width modulation signal on the control guide line, and then outputting.
  • the method and device for detecting the charging switch of the electric vehicle of the present invention have the following effects:
  • the invention determines whether the internal charging switch is faulty according to the amplitude of the pulse width modulation signal on the control guide line under different charging states of the electric vehicle, and can detect the S2 switch failure of the AC charging side more conveniently and efficiently, and locate Electric vehicle AC charging failure. At the same time, the detection method is simple and practical, without additional cost.
  • FIG. 1 is a schematic diagram of a guiding circuit of an existing electric vehicle AC charging.
  • FIG. 2 is a flow chart showing the operation of a method for detecting a charging switch of an electric vehicle according to the present invention.
  • FIG. 3 is a timing chart of connection control of AC charging of an electric vehicle.
  • FIG. 4 is a flow chart showing the operation of a preferred embodiment of a method for detecting an electric vehicle charging switch according to the present invention.
  • FIG. 5 is a block diagram of a device of an electric vehicle charging switch detecting device according to the present invention.
  • FIG. 6 is a circuit diagram of an amplitude acquisition module in an embodiment of an electric vehicle charging switch detecting device according to the present invention.
  • the electric vehicle includes an in-vehicle charger 1 , a vehicle control device 2 , and a charging interface 3 .
  • the vehicle internal charging switch S2 is electrically connected to the control guide line CP of the charging interface 3, and the vehicle control device 2 respectively electrically connects with the charging interface 3 to confirm the line CC and the control guide line CP.
  • Electrical connection, the detection method includes:
  • Step S201 determining a current state of charge of the electric vehicle
  • Step S202 acquiring a magnitude of a pulse width modulation signal on the control guide line
  • Step S203 If the amplitude does not match the current charging state, determine a fault and alert.
  • the amplitudes of the pulse width modulation signals on the control guide lines are different. Therefore, the current charging state is determined in step S201, the amplitude is acquired in step S202, and the different charging states and controls are performed in step S203. The amplitude of the pulse width modulation signal on the guide line is compared to determine whether malfunction.
  • the amplitude of the pulse width modulation signal on the control guide line is the amplitude of the output point B in FIG.
  • the invention determines whether the internal charging switch is faulty according to the amplitude of the pulse width modulation signal on the control guide line under different charging states of the electric vehicle, and can detect the S2 switch failure of the AC charging side more conveniently and efficiently, and locate Electric vehicle AC charging failure. At the same time, the detection method is simple and practical, without additional cost.
  • the charging state includes an offline state indicating that the charging interface is not electrically connected to the external power supply device, indicating that the charging interface is electrically connected to the external power supply device, but the vehicle is internally charged.
  • the electrical connection state in which the switch is open, the on-line state indicating that the charging interface is electrically connected to the external power supply device and the internal charging switch of the vehicle is closed.
  • an initial state that is, when an external power supply device is not connected, for example, when the charging gun is not inserted, it is in an offline state;
  • the S2 switch closure command has not been sent at this time.
  • the line enters the online state and sends a closed S2 switch command.
  • the Online state Perform the AC charging process.
  • the determining the current state of charge of the electric vehicle includes:
  • the voltage on the electrical connection confirmation line CC is detected by the output point C of FIG.
  • the voltage of the output point C is greater than the preset electrical connection confirmation threshold, for example, entering the RC resistance corresponding voltage range, it is determined to be the connected state.
  • determining a fault and alerting specifically:
  • the current charging state is an electrical connection state, and the amplitude is lower than a preset electrical connection abnormal threshold, determining a fault
  • the current charging state is an online state, and the amplitude is higher than a preset charging abnormal threshold, determining a fault
  • the charging abnormality threshold is greater than the electrical connection abnormality threshold.
  • FIG. 3 is a schematic diagram of the detection points A, B, C, the switches S1, S2, S3, the output voltage, and the output current in each state.
  • the Offline state corresponds to the state P1 of FIG. 3
  • the Connect state corresponds to the state P2 of FIG. 3
  • the Online state corresponds to the state P3 of FIG.
  • the S2 switch closure command has not been sent at this time, and the CP amplitude should be in the range of 9V (as before the time of FIG. 3T2).
  • the CP amplitude is detected within the range of 6V, the current S2 switch can be considered to be in an abnormally closed state, and the S2 normally closed fault alarm is reported after confirmation.
  • the CP amplitude should be in the 6V range (as shown in Figure 3T2).
  • the current S2 switch can be considered to be in an abnormally disconnected state. After confirmation, the S2 normally open fault alarm is reported.
  • the acquiring the amplitude of the pulse width modulation signal on the control guide line includes:
  • a working flow chart of a preferred embodiment of a method for detecting an electric vehicle charging switch according to the present invention includes:
  • Step S401 the charging gun is not inserted, there is no CC, CP signal, and the charging state is Offline;
  • Step S402 when the charging gun is inserted, and the mechanical lock is closed, the charging gun is stably inserted, and the CC detecting voltage enters the corresponding voltage range of the RC resistor, and enters the Connect state;
  • Step S403 in the Connect state, the CC voltage of the output point C, the CP duty ratio, the frequency, and the amplitude of the output point B are detected.
  • the CP amplitude is detected within the range of 6V, the current S2 switch is considered to be abnormally closed. Status, after confirmation, the S2 normally closed fault alarm is reported;
  • Step S404 when the CC voltage is normal, the CP duty cycle frequency is normal, the condition is allowed to charge, enter the Online state and send a closed S2 switch command, step S405 is performed, and when the CC is disconnected, step S408 is performed;
  • Step S405 in the Online state, performing an AC charging process
  • step S406 the CC and the CP are detected in the Online state.
  • the CP amplitude is within the range of 9 V, the current S2 switch is considered to be in an abnormally disconnected state, and the S2 normally open fault alarm is reported after the confirmation;
  • Step S407 when the CP, CC abnormality or external request to stop charging, exit Online to enter the Connect state, step S403;
  • step S408 the offline state is entered.
  • an electric vehicle charging switch detecting device of the present invention includes an in-vehicle charger, a vehicle control device, and a charging interface, and the in-vehicle charger passes through the vehicle internal charging switch and the charging interface.
  • the control guide line is electrically connected
  • the vehicle control device is electrically connected to the electrical connection confirmation line of the charging interface and the control guide line
  • the device module diagram of the detecting device includes:
  • the status confirmation module 501 is configured to: determine a current state of charge of the electric vehicle;
  • the amplitude obtaining module 502 is configured to: acquire a magnitude of a pulse width modulation signal on the control guide line;
  • the fault alarm module 503 is configured to: if the amplitude does not match the current charging state, determine a fault and alarm.
  • the charging state includes an offline state indicating that the charging interface is not electrically connected to the external power supply device, indicating that the charging interface is electrically connected to the external power supply device, but the vehicle is internally charged.
  • the electrical connection state in which the switch is open, the on-line state indicating that the charging interface is electrically connected to the external power supply device and the internal charging switch of the vehicle is closed.
  • the status confirming module is specifically configured to:
  • the fault alarm module is specifically configured to:
  • the current charging state is an electrical connection state, and the amplitude is lower than a preset electrical connection abnormal threshold, determining a fault
  • the current charging state is an online state, and the amplitude is higher than a preset charging abnormal threshold, determining a fault
  • the charging abnormality threshold is greater than the electrical connection abnormality threshold.
  • the amplitude acquiring module is specifically configured to:
  • the amplitude acquiring module specifically includes: an input end 61 electrically connected to the control guiding line, and a first diode D61, the second diode D62, the first resistor R61, the second resistor R62, the third resistor R63, the fourth resistor R64, the fifth resistor R65, the capacitor C61, the single chip U61;
  • the input end 61 is electrically connected to the anode of the first diode D61 and the anode of the second diode D62, respectively;
  • the cathode of the first diode D61 is electrically connected to the first resistor R61, the third resistor R63, and the analog sampling terminal U611 of the single chip U61.
  • the connection point of the first resistor R61 and the third resistor R63 is grounded via the second resistor R62.
  • the connection point of the third resistor R63 and the analog sampling terminal U611 of the single chip U61 is grounded via the capacitor C61;
  • the cathode of the second diode D62 is electrically connected to the fourth resistor R64 and the pulse width modulation signal sampling terminal U612 of the single chip U61, and the connection point of the cathode of the second diode D62 and the fourth resistor R64 is grounded via the fifth resistor R65. ;
  • the single chip microcomputer U61 is configured to acquire the pulse width modulation on the control guide line from the analog sampling end U611 Obtaining an effective voltage of the signal, obtaining a duty ratio of the pulse width modulation signal on the control guide line from the pulse width modulation signal sampling end U612, and calculating the control guide line according to the duty ratio and the effective voltage The amplitude of the pulse width modulated signal is output.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

L'invention concerne un procédé de détection d'un commutateur de charge d'un véhicule électrique. Le véhicule électrique comprend un chargeur embarqué (1), un dispositif de commande de véhicule (2) et une interface de charge (3). Le chargeur embarqué (1) est connecté électriquement à une ligne pilote de commande (CP) de l'interface de charge (3) par l'intermédiaire d'un commutateur de charge (S2) dans le véhicule. Le dispositif de commande de véhicule (2) est connecté électriquement respectivement à une ligne de confirmation de connexion électrique (CC) de l'interface de charge (3) et à la ligne pilote de commande (CP). Le procédé de détection consiste à : déterminer un état de charge actuel du véhicule électrique (S201); acquérir une valeur d'amplitude d'un signal de modulation de largeur d'impulsions sur la ligne pilote de commande (CP) (S202); et si la valeur d'amplitude ne correspond pas à l'état de charge actuel, déterminer la présence d'une défaillance et générer une alarme (S203). La solution technique détermine si le commutateur de charge interne (S2) est défaillant sur la base de la valeur d'amplitude du signal de modulation de largeur d'impulsions sur la ligne pilote de commande (CP) dans différents états de charge du véhicule électrique, de telle sorte qu'une défaillance du commutateur côté charge CA (S2) peut être détectée de manière pratique et efficace, et qu'une défaillance de charge CA du véhicule électrique peut être localisée.
PCT/CN2017/092322 2017-01-05 2017-07-09 Procédé et dispositif de détection d'un commutateur de charge d'un véhicule électrique WO2018126634A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710006507.1 2017-01-05
CN201710006507.1A CN108279373B (zh) 2017-01-05 2017-01-05 电动汽车充电开关检测方法、装置

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