CN113009249B - Fault diagnosis method for charging pile component - Google Patents
Fault diagnosis method for charging pile component Download PDFInfo
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- CN113009249B CN113009249B CN202110196475.2A CN202110196475A CN113009249B CN 113009249 B CN113009249 B CN 113009249B CN 202110196475 A CN202110196475 A CN 202110196475A CN 113009249 B CN113009249 B CN 113009249B
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/06—Arrangements for measuring electric power or power factor by measuring current and voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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- 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
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- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/74—Testing of fuses
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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
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a fault diagnosis method for a charging pile component in the technical field of electric automobiles, which comprises the following steps: step S10, acquiring power output current of a power unit and a switch control signal of a relay, acquiring voltage of a first end of the relay, and sending the voltage to a charging controller to diagnose the working state of the relay, so as to generate a first diagnosis result; step S20, collecting the second terminal voltage of the fuse, and a relay K 0 And the third terminal voltage of the fuse, the charging current of the fuse, and the charging current is sent to the charging controller to pair the fuse and the relay K 0 The working state of the device is diagnosed, and a second diagnosis result is generated; step S30, the charging controller adjusts the power output current of each power unit based on a current adjustment rule, collects the voltage drop of each component, calculates the resistance of each component, and draws a resistance curve; and step S40, the charge controller stores the diagnosis result and the resistance curve. The invention has the advantages that: the efficiency of component fault diagnosis is greatly improved.
Description
Technical Field
The invention relates to the technical field of electric automobiles, in particular to a fault diagnosis method for a charging pile component.
Background
The electric vehicle (BEV) is a vehicle which uses a vehicle-mounted power supply as power and uses a motor to drive wheels to run, meets various requirements of road traffic and safety regulations, has a smaller influence on environment than a traditional vehicle, has a wide prospect, and becomes a future development trend. With the development of electric vehicles, the charging demands of the electric vehicles are increasing, and the number of the charging piles is explosively increased.
The fault of the charging pile directly affects the safety and user experience of the electric automobile charging, so that the fault of the charging pile needs to be diagnosed and positioned. However, when the charging pile fails, a series of detection works are needed for the charging pile by operation and maintenance personnel, so that the failed components can be diagnosed, the efficiency is low, the user is reduced by one charging pile capable of charging, and the charging waiting time is prolonged.
Therefore, how to provide a fault diagnosis method for the components of the charging pile, so as to improve the efficiency of fault diagnosis of the components, is a problem to be solved urgently.
Disclosure of Invention
The invention aims to solve the technical problem of providing a fault diagnosis method for a charging pile component, which can improve the efficiency of fault diagnosis of the component.
The invention is realized in the following way: a fault diagnosis method for a charging pile component comprises the following steps:
step S10, the power detector acquires power output current of each power unit and switch control signals of each relay through the power controller, and acquires the relay K 1 To relay K m Is transmitted to the charging controller; the charging controller pairs the relay K based on each of the power output current, the first terminal voltage and the switch control signal 1 To relay K m The working state of the device is diagnosed, and a first diagnosis result is generated;
step S20, the power detector collects the voltage of the second end of the fuse and the relay K 0 The third terminal voltage of the fuse and the charging current of the fuse are sent to a charging controller; the charging controller controls the fuse and the relay K based on the second terminal voltage, the third terminal voltage and the charging current 0 The working state of the device is diagnosed, and a second diagnosis result is generated;
step S30, a current regulation rule is established by the charging controller, the power output current of each power unit is regulated through the power detector based on the current regulation rule, the voltage drop of each component is collected through the power detector, the resistance of each component is calculated, and a resistance curve is drawn;
step S40, the charging controller stores the first diagnosis result, the second diagnosis result and the resistance curve;
the steps S10, S20 and S30 are not sequential.
Further, the step S10 specifically includes:
step S11, the power detector obtains the power output current I of each power unit through the power controller n Switch control signal C of each relay m The method comprises the steps of carrying out a first treatment on the surface of the Wherein n represents the number of the power unit and is a positive integer; m represents the number of the relay and is a positive integer; c (C) m The value of (2) is 0 or 1, the value of 0 indicates that the relay is opened, and the value of 1 indicates that the relay is closed;
step S12, collecting relay K by power detector 1 To relay K m Is set at the first end voltage V m And outputs the power to the current I n First end voltage V m Switch control signal C m Sending the data to a charging controller;
step S13, the charging controller outputs current I based on each power n First terminal voltage V m Respectively calculating relays K 1 To relay K m Power P of (2) m ：P m ＝V m *I n ；
Step S14, the charging controller pre-stores a first power standard range, and the charging controller judges the power P m If so, entering step S15; if not, go to step S17;
step S15, the charging controller judges the switch control signal C m If the value of (2) is 0, generating a first diagnosis result of refusal of the relay switch; if not, the step S16 is carried out;
step S16, charging controlThe power P is judged by the controller m Whether the power is within a first power standard range or not, if so, generating a first diagnosis result with normal power; if not, generating a first diagnosis result of power abnormality;
step S17, the charging controller judges the switch control signal C m If the value of the relay switch is 0, generating a first diagnosis result of normal relay switch action; if not, a first diagnosis result of refusal closing of the relay switch is generated.
Further, the step S20 specifically includes:
step S21, the power detector collects the voltage V of the second end of the fuse FUSE Relay K 0 Is a third terminal voltage V of K0 Charging current I of fuse 0 And applying the second terminal voltage V FUSE Voltage V at third end K0 Charging current I 0 Sending the data to a charging controller;
step S22, the charging controller is based on the second terminal voltage V FUSE (fusion device) Charging current I 0 Calculating the power P of a fuse FUSE ：P FUSE ＝V FUSE *I 0 ；
Step S23, the charging controller pre-stores a second power standard range, and the charging controller judges P FUSE Whether the power of the fuse is within a second power standard range or not, if so, generating a second diagnosis result of normal fuse power; if not, generating a second diagnosis result of abnormal fuse power;
step S24, the charging controller is based on the third terminal voltage V K0 Charging current I 0 Calculation relay K 0 Power P of (2) K0 ：P K0 ＝V K0 *I 0 ；
Step S25, the charging controller acquires a relay K 0 Switch control signal C K0 ，C K0 The value of (2) is 0 or 1, the value of 0 indicates that the relay is opened, and the value of 1 indicates that the relay is closed;
step S26, the charging controller pre-stores a third power standard range, and the charging controller judges the power P K0 Whether or not it is greater than 0, if soStep S27 is entered; if not, go to step S29;
step S27, the charging controller judges the switch control signal C K0 If the value of (2) is 0, generating a second diagnosis result of refusal of the relay switch; if not, go to step S28;
step S28, the charging controller judges the power P K0 Whether the power is within the third power standard range or not, if so, generating a second diagnosis result with normal power; if not, generating a second diagnosis result of the power abnormality;
step S29, the charging controller judges the switch control signal C K0 If the value of the relay switch is 0, generating a second diagnosis result of normal relay switch action; if not, generating a second diagnosis result of refusal closing of the relay switch.
Further, the step S30 specifically includes:
step S31, the charging controller pre-stores a plurality of standard resistance curves, the charging controller creates a current adjustment rule, and adjusts the power output current I of each power unit through the power detector based on the current adjustment rule n ；
Step S32, collecting the voltage drop U of each component through a power detector a Based on the pressure drop U a Power output current I n Calculating the resistance R of each component a ：R a ＝(U a1 -U a2 )/(I n1 -I n2 )；
Step S33, the charging controller outputs a current I based on the power n Resistor R a And drawing a resistance curve, and monitoring the resistance curve in real time based on the standard resistance curve.
Further, in the step S30, the current adjustment rule specifically includes:
setting a current decreasing proportion, and sequentially decreasing the power output current of each power unit from rated power based on the current decreasing proportion.
Further, in the step S30, the component is a fuse or a relay K 0 RelayK 1 … … or relay K m 。
Further, the step S40 specifically includes:
and the charging controller stores the first diagnosis result, the second diagnosis result and the resistance curve, and displays the first diagnosis result, the second diagnosis result and the resistance curve through a display screen.
The invention has the advantages that:
the working state of each relay can be rapidly judged by collecting the voltage and the current of each relay and combining the switch control signal and the power standard range of each relay; the working state of the fuse can be rapidly judged by collecting the voltage and the current of the fuse and combining the power standard range of the fuse; the power output current of each power unit is sequentially decreased from rated power based on the current decreasing proportion, then the voltage drop of each component is collected, the resistance of each component is calculated, a resistance curve is drawn, real-time monitoring of the resistance of each component under different currents is achieved, when the charging pile breaks down, the broken component can be immediately judged, a series of detection work is not needed to be carried out on the charging pile like the conventional one, and the efficiency of fault diagnosis of the component is greatly improved.
Drawings
The invention will be further described with reference to examples of embodiments with reference to the accompanying drawings.
Fig. 1 is a flowchart of a fault diagnosis method for a charging pile component according to the present invention.
Fig. 2 is a schematic block diagram of the circuit of the charging stake of the present invention.
Fig. 3 is a schematic block diagram of the circuit of the relay of the present invention.
Detailed Description
According to the technical scheme in the embodiment of the application, the overall thought is as follows: calculating power by collecting voltage and current of each relay and combining a switch control signal and a power standard range of each relay, and detecting each relay, namely, the power is larger than 0, the value of the switch control signal is 1, the power is in the power standard range or the power is 0, and the switch control signal is normal under the condition of 0; calculating power by collecting voltage and current of the fuse, and detecting the fuse by combining the power standard range of the fuse; the power output current of each power unit is sequentially decreased from rated power based on the current decreasing proportion, then the voltage drop of each component is collected, the resistance of each component is calculated, a resistance curve is drawn, real-time monitoring of the resistance of each component under different currents is achieved, the failed component can be judged only through simple steps, and therefore the efficiency of component fault diagnosis and positioning is improved.
Referring to fig. 2 to 3, the present invention is to use a charging pile comprising an ac power source, a plurality of power units G n A plurality of relays K m A power controller, a power detector, a fuse, a charge controller and a relay K 0 ；
Each of the power units G n The input end of (2) is connected with an alternating current power supply, and the output end is connected with a relay K m Connecting; each relay K m The output anode of the (C) is connected with the fuse, and the output cathode is connected with the relay K 0 Connecting; the power controller and each power unit G n Connecting; the power controller is respectively connected with the power controller, the charging controller, the fuse and the relay K 0 Relay K m Connecting; the charging controller is respectively connected with the power controller and the relay K 0 Relay K m And (5) connection.
The power controller is used for controlling each power unit G n Output power of (2); the power detector is used for detecting the voltage and the current of each component and further calculating the power; the fuse is used for providing overcurrent protection for the charging pile; the charging controller is used for controlling the charging pile; DC+ and DC-represent the positive and negative poles of the charging gun output, respectively.
Referring to fig. 1 to 3, a preferred embodiment of a fault diagnosis method for a charging pile component according to the present invention includes the following steps:
step S10, the power detector obtains the power output current of each power unit and each power unit through the power controllerThe relay K is collected by the switch control signal of the relay 1 To relay K m Is transmitted to the charging controller; the charging controller pairs the relay K based on each of the power output current, the first terminal voltage and the switch control signal 1 To relay K m The working state of the device is diagnosed, and a first diagnosis result is generated;
step S20, the power detector collects the voltage of the second end of the fuse and the relay K 0 A third terminal voltage of the FUSE (FUSE), and a charging current of the FUSE (FUSE), and transmitting the charging current to the charging controller; the charging controller controls the fuse and the relay K based on the second terminal voltage, the third terminal voltage and the charging current 0 The working state of the device is diagnosed, and a second diagnosis result is generated;
step S30, a current regulation rule is established by the charging controller, the power output current of each power unit is regulated through the power detector based on the current regulation rule, the voltage drop of each component is collected through the power detector, the resistance of each component is calculated, and a resistance curve is drawn;
step S40, the charging controller stores the first diagnosis result, the second diagnosis result and the resistance curve;
the steps S10, S20 and S30 are not sequential.
The step S10 specifically includes:
step S11, the power detector obtains the power output current I of each power unit through the power controller n Switch control signal C of each relay m The method comprises the steps of carrying out a first treatment on the surface of the Wherein n represents the number of the power unit and is a positive integer; m represents the number of the relay and is a positive integer; c (C) m The value of (2) is 0 or 1, the value of 0 indicates that the relay is opened, and the value of 1 indicates that the relay is closed;
step S12, collecting relay K by power detector 1 To relay K m Is set at the first end voltage V m And outputs the power to the current I n First end voltage V m Switch control signal C m Sending the data to a charging controller;
step S13,The charge controller outputs a current I based on each of the powers n First terminal voltage V m Respectively calculating relays K 1 To relay K m Power P of (2) m ：P m ＝V m *I n ；
Step S14, the charging controller pre-stores a first power standard range, and the charging controller judges the power P m If so, entering step S15; if not, go to step S17;
step S15, the charging controller judges the switch control signal C m If the value of (2) is 0, generating a first diagnosis result of refusal of the relay switch; if not, the step S16 is carried out;
step S16, the charging controller judges the power P m Whether the power is within a first power standard range or not, if so, generating a first diagnosis result with normal power; if not, generating a first diagnosis result of power abnormality;
step S17, the charging controller judges the switch control signal C m If the value of the relay switch is 0, generating a first diagnosis result of normal relay switch action; if not, a first diagnosis result of refusal closing of the relay switch is generated.
The step S20 specifically includes:
step S21, the power detector collects the voltage V of the second end of the fuse FUSE Relay K 0 Is a third terminal voltage V of K0 Charging current I of fuse 0 And applying the second terminal voltage V FUSE Voltage V at third end K0 Charging current I 0 Sending the data to a charging controller;
step S22, the charging controller is based on the second terminal voltage V FUSE (fusion device) Charging current I 0 Calculating the power P of a fuse FUSE ：P FUSE ＝V FUSE *I 0 ；
Step S23, the charging controller pre-stores a second power standard range, and the charging controller judges P FUSE Whether the power is within the second power standard range, if so, generating a second diagnosis junction with normal fuse powerFruit; if not, generating a second diagnosis result of abnormal fuse power;
step S24, the charging controller is based on the third terminal voltage V K0 Charging current I 0 Calculation relay K 0 Power P of (2) K0 ：P K0 ＝V K0 *I 0 ；
Step S25, the charging controller acquires a relay K 0 Switch control signal C K0 ，C K0 The value of (2) is 0 or 1, the value of 0 indicates that the relay is opened, and the value of 1 indicates that the relay is closed;
step S26, the charging controller pre-stores a third power standard range, and the charging controller judges the power P K0 If so, the step S27 is carried out; if not, go to step S29;
step S27, the charging controller judges the switch control signal C K0 If the value of (2) is 0, generating a second diagnosis result of refusal of the relay switch; if not, go to step S28;
step S28, the charging controller judges the power P K0 Whether the power is within the third power standard range or not, if so, generating a second diagnosis result with normal power; if not, generating a second diagnosis result of the power abnormality;
step S29, the charging controller judges the switch control signal C K0 If the value of the relay switch is 0, generating a second diagnosis result of normal relay switch action; if not, generating a second diagnosis result of refusal closing of the relay switch.
The step S30 specifically includes:
step S31, the charging controller pre-stores a plurality of standard resistance curves, the charging controller creates a current adjustment rule, and adjusts the power output current I of each power unit through the power detector based on the current adjustment rule n ；
Step S32, collecting the voltage drop U of each component through a power detector a Based on the pressure drop U a Power output current I n Calculating the resistance R of each component a ：R a ＝(U a1 -U a2 )/(I n1 -I n2 )；
The above formula is derived from:
I n1 *R a ＝U a1 ；
I n2 *R a ＝U a2 ；
step S33, the charging controller outputs a current I based on the power n Resistor R a And drawing a resistance curve (I-R curve), and monitoring the resistance curve in real time based on the standard resistance curve. In specific implementation, corresponding lifting can be performed according to the gear with resistance deviation, for example, the deviation is within 10%, normal is indicated, the deviation is between 10% and 20%, slight abnormality is indicated, the deviation is greater than 20%, severe abnormality is indicated, and operation and maintenance are suggested.
In the step S30, the current adjustment rule specifically includes:
setting a current decreasing proportion, and sequentially decreasing the power output current of each power unit from rated power based on the current decreasing proportion. For example, the power output current of each power unit is set to be 100% I in turn Forehead (forehead) 、95％I Forehead (forehead) 、90％I Forehead (forehead) ……10％I Forehead (forehead) 。
In the step S30, the components are fuses and relays K 0 Relay K 1 … … or relay K m 。
The step S40 specifically includes:
and the charging controller stores the first diagnosis result, the second diagnosis result and the resistance curve, and displays the first diagnosis result, the second diagnosis result and the resistance curve through a display screen.
In summary, the invention has the advantages that:
the working state of each relay can be rapidly judged by collecting the voltage and the current of each relay and combining the switch control signal and the power standard range of each relay; the working state of the fuse can be rapidly judged by collecting the voltage and the current of the fuse and combining the power standard range of the fuse; the power output current of each power unit is sequentially decreased from rated power based on the current decreasing proportion, then the voltage drop of each component is collected, the resistance of each component is calculated, a resistance curve is drawn, real-time monitoring of the resistance of each component under different currents is achieved, when the charging pile breaks down, the broken component can be immediately judged, a series of detection work is not needed to be carried out on the charging pile like the conventional one, and the efficiency of fault diagnosis of the component is greatly improved.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that the specific embodiments described are illustrative only and not intended to limit the scope of the invention, and that equivalent modifications and variations of the invention in light of the spirit of the invention will be covered by the claims of the present invention.
Claims (5)
1. A fault diagnosis method for a charging pile component is characterized by comprising the following steps of: the method comprises the following steps:
step S10, the power detector acquires power output current of each power unit and switch control signals of each relay through the power controller, and acquires the relay K 1 To relay K m Is transmitted to the charging controller; the charging controller pairs the relay K based on each of the power output current, the first terminal voltage and the switch control signal 1 To relay K m The working state of the device is diagnosed, and a first diagnosis result is generated;
step S20, the power detector collects the voltage of the second end of the fuse and the relay K 0 The third terminal voltage of the fuse and the charging current of the fuse are sent to a charging controller; the charging controller controls the fuse and the relay K based on the second terminal voltage, the third terminal voltage and the charging current 0 The working state of the device is diagnosed, and a second diagnosis result is generated;
step S30, a current regulation rule is established by the charging controller, the power output current of each power unit is regulated through the power detector based on the current regulation rule, the voltage drop of each component is collected through the power detector, the resistance of each component is calculated, and a resistance curve is drawn;
step S40, the charging controller stores the first diagnosis result, the second diagnosis result and the resistance curve;
the steps S10, S20 and S30 are not sequenced;
the step S10 specifically includes:
step S11, the power detector obtains the power output current I of each power unit through the power controller n Switch control signal C of each relay m The method comprises the steps of carrying out a first treatment on the surface of the Wherein n represents the number of the power unit and is a positive integer; m represents the number of the relay and is a positive integer; c (C) m The value of (2) is 0 or 1, the value of 0 indicates that the relay is opened, and the value of 1 indicates that the relay is closed;
step S12, collecting relay K by power detector 1 To relay K m Is set at the first end voltage V m And outputs the power to the current I n First end voltage V m Switch control signal C m Sending the data to a charging controller;
step S13, the charging controller outputs current I based on each power n First terminal voltage V m Respectively calculating relays K 1 To relay K m Power P of (2) m ：P m ＝V m *I n ；
Step S14, the charging controller pre-stores a first power standard range, and the charging controller judges the power P m If so, entering step S15; if not, go to step S17;
step S15, the charging controller judges the switch control signal C m If the value of (2) is 0, generating a first diagnosis result of refusal of the relay switch; if not, the step S16 is carried out;
step S16, the charging controller judges the power P m Whether the power is within a first power standard range or not, if so, generating a first diagnosis result with normal power; if not, generating a first diagnosis result of power abnormality;
step S17, the charging controller judges the switch control signal C m If the value of the relay switch is 0, generating a first diagnosis result of normal relay switch action; if not, generating a first diagnosis result of refusal closing of the relay switch;
the step S20 specifically includes:
step S21, the power detector collects the voltage V of the second end of the fuse FUSE Relay K 0 Is a third terminal voltage V of K0 Charging current I of fuse 0 And applying the second terminal voltage V FUSE Voltage V at third end K0 Charging current I 0 Sending the data to a charging controller;
step S22, the charging controller is based on the second terminal voltage V FUSE Charging current I 0 Calculating the power P of a fuse FUSE ：P FUSE ＝V FUSE *I 0 ；
Step S23, the charging controller pre-stores a second power standard range, and the charging controller judges P FUSE Whether the power of the fuse is within a second power standard range or not, if so, generating a second diagnosis result of normal fuse power; if not, generating a second diagnosis result of abnormal fuse power;
step S24, the charging controller is based on the third terminal voltage V K0 Charging current I 0 Calculation relay K 0 Power P of (2) K0 ：P K0 ＝V K0 *I 0 ；
Step S25, the charging controller acquires a relay K 0 Switch control signal C K0 ，C K0 The value of (2) is 0 or 1, the value of 0 indicates that the relay is opened, and the value of 1 indicates that the relay is closed;
step S26, the charging controller pre-stores a third power standard range, and the charging controller judges the power P K0 If so, the step S27 is carried out; if not, go to step S29;
step S27, the charging controller judges the switch control signal C K0 If the value of (2) is 0, generating refusal opening of the relay switchA second diagnostic result; if not, go to step S28;
step S28, the charging controller judges the power P K0 Whether the power is within the third power standard range or not, if so, generating a second diagnosis result with normal power; if not, generating a second diagnosis result of the power abnormality;
step S29, the charging controller judges the switch control signal C K0 If the value of the relay switch is 0, generating a second diagnosis result of normal relay switch action; if not, generating a second diagnosis result of refusal closing of the relay switch.
2. The method for diagnosing a fault of a charging pile component according to claim 1, characterized by: the step S30 specifically includes:
step S31, the charging controller pre-stores a plurality of standard resistance curves, the charging controller creates a current adjustment rule, and adjusts the power output current I of each power unit through the power detector based on the current adjustment rule n ；
Step S32, collecting the voltage drop U of each component through a power detector a Based on the pressure drop U a Power output current I n Calculating the resistance R of each component a ：R a ＝(U a1 -U a2 )/(I n1 -I n2 )；
Step S33, the charging controller outputs a current I based on the power n Resistor R a And drawing a resistance curve, and monitoring the resistance curve in real time based on the standard resistance curve.
3. The method for diagnosing a fault of a charging pile component according to claim 1, characterized by: in the step S30, the current adjustment rule specifically includes:
setting a current decreasing proportion, and sequentially decreasing the power output current of each power unit from rated power based on the current decreasing proportion.
4. A kind of as claimed in claim 1The fault diagnosis method for the charging pile component is characterized by comprising the following steps of: in the step S30, the components are fuses and relays K 0 Relay K 1 … … or relay K m 。
5. The method for diagnosing a fault of a charging pile component according to claim 1, characterized by: the step S40 specifically includes:
and the charging controller stores the first diagnosis result, the second diagnosis result and the resistance curve, and displays the first diagnosis result, the second diagnosis result and the resistance curve through a display screen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110196475.2A CN113009249B (en) | 2021-02-22 | 2021-02-22 | Fault diagnosis method for charging pile component |
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| CN202110196475.2A CN113009249B (en) | 2021-02-22 | 2021-02-22 | Fault diagnosis method for charging pile component |
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| CN113009249A CN113009249A (en) | 2021-06-22 |
| CN113009249B true CN113009249B (en) | 2023-07-28 |
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