CN113589194B - Adhesion detection and short circuit detection circuit and control method thereof - Google Patents
Adhesion detection and short circuit detection circuit and control method thereof Download PDFInfo
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- CN113589194B CN113589194B CN202010363689.XA CN202010363689A CN113589194B CN 113589194 B CN113589194 B CN 113589194B CN 202010363689 A CN202010363689 A CN 202010363689A CN 113589194 B CN113589194 B CN 113589194B
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- switch
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- charging pile
- diode
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- 238000001514 detection method Methods 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000007547 defect Effects 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 206010000369 Accident Diseases 0.000 description 1
- 206010014357 Electric shock Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- 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
- G01R31/54—Testing for continuity
-
- 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
- G01R31/56—Testing of electric apparatus
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
A bonding detection and short circuit detection circuit and a control method thereof comprise a controller, a first switch, a second switch, a first resistor, a second resistor, a third resistor, a first diode and a second diode, wherein a contact end of the first switch is connected with the first resistor in series, the second switch is connected with one end of the second resistor in series, and the other end of the second resistor is respectively connected with the third resistor, an anode of the first diode, a cathode of the second diode and a first detection port. The device further comprises a fourth resistor, a fifth resistor, a sixth resistor, a third diode and an optocoupler, wherein the fourth resistor is connected with the anode of the input end of the optocoupler, the cathode of the input end of the optocoupler is connected with the anode of the third diode, and the cathode of the third diode is connected with the fifth resistor; the output end of the optical coupler is connected with the sixth resistor and the second detection port respectively. The invention overcomes the defects of the prior art, and can effectively detect whether the charging pile is stuck and failed or not and detect whether the charging pile is short-circuited or not.
Description
Technical Field
The invention relates to the technical field of charging piles, in particular to an adhesion detection and short circuit detection circuit and a control method thereof.
Background
In the current operation process of the charging pile, if the output adhesion fault or the short circuit fault cannot be detected in time, serious safety accidents are easy to occur, the electric shock risk of a user can be caused, and fire accidents can be also caused.
In this case, a circuit is proposed which can detect both whether the charging pile is stuck and failed and whether the charging pile is shorted.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a sticking detection and short circuit detection circuit capable of effectively detecting sticking and short circuit faults at the output side of a charging pile and a control method thereof.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
The utility model provides an adhesion detection and short circuit detection circuit, includes controller, first switch, second switch, first resistance, second resistance, third resistance, first diode and second diode, first switch and second switch all include control end and a contact end, the contact end and the first resistance of first switch are established ties, the control end of first switch and second switch is connected with the controller respectively, the contact end and the one end of second resistance of second switch are established ties, the other end of second resistance is connected with the positive pole of third resistance, first diode, the negative pole of second diode and first detection port respectively.
Preferably, the circuit further comprises a fourth resistor, a fifth resistor, a sixth resistor, a third diode and an optocoupler, wherein the fourth resistor is connected with an anode of an input end of the optocoupler, a cathode of the input end of the optocoupler is connected with an anode of the third diode, and a cathode of the third diode is connected with the fifth resistor; and the output end of the optical coupler is respectively connected with the sixth resistor and the second detection port.
Preferably, the first switch, the second switch, the fourth resistor and the fifth resistor are respectively connected with the alternating current output end of the charging pile.
Preferably, the controller is electrically connected with the battery management system and is used for obtaining information of the charging voltage and the charging current of the battery pack.
The invention also discloses a control method of the adhesion detection and short circuit detection circuit, which is applied to the adhesion detection and short circuit detection circuit and comprises the following steps:
s1: before starting charging, the controller controls the first switch and the second switch to be closed;
s2: judging whether an output live wire switch of the charging pile is adhered or not through waveforms of the first detection port;
S21: if the waveform of the first detection port is constant direct-current voltage Vcc, a live wire switch of the charging pile is not adhered;
S22: if the waveform of the first detection port is pulse superposition direct-current voltage Vcc×R2/(R2+R3), the live wire switch of the charging pile is adhered;
S23: if the waveform of the first detection port is constant direct-current voltage Vcc× (R1+R2)/(R1+R2+R3), the zero line and the live line of the output side of the charging pile are short-circuited;
s4: the controller controls the first switch and the second switch to be opened;
s5: the controller controls the closing of the charging pile live wire switch;
S6: judging whether an output zero line switch of the charging pile is adhered or not through waveforms of the second detection port;
s61: if the pulse is the pulse with the amplitude of Vcc, the zero line switch of the charging pile is adhered;
s62: if the voltage is constant direct-current voltage Vcc, a zero line switch of the charging pile is not adhered;
s7: the controller controls the disconnection of the charging pile live wire switch;
s71: if no adhesion or short circuit is detected in both step S2 and step S6, entering a control guidance phase;
S72: if step S2 or step S6 detects adhesion or short circuit, the controller controls to give an alarm.
The beneficial effects are that: the invention provides an adhesion detection and short circuit detection circuit and a control method thereof. Whether the charging pile is stuck to the fault can be effectively detected, and whether the charging pile is short-circuited can be detected.
Drawings
In order to more clearly illustrate the invention or the technical solutions in the prior art, the drawings used in the description of the prior art will be briefly described below.
FIG. 1 is a schematic circuit diagram of the present invention;
FIG. 2 is a control flow diagram of the present invention;
FIG. 3 is a modified circuit diagram of the present invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings.
As shown in fig. 1, the invention discloses a circuit for detecting adhesion and short circuit, which comprises a controller, a first switch K1, a second switch K2, a first resistor R1, a second resistor R2, a third resistor R3, a first diode D1 and a second diode D2, wherein the first switch K1 and the second switch K2 respectively comprise a control end and a contact end, the contact end of the first switch K1 is connected with the first resistor R1 in series, the control ends of the first switch K1 and the second switch K2 are respectively connected with the controller, the contact end of the second switch K2 is connected with one end of the second resistor R2 in series, and the other end of the second resistor R2 is respectively connected with the third resistor R3, the anode of the first diode D1, the cathode of the second diode D2 and a first detection port; the first detection port is connected to a singlechip acquisition pin and is used for detecting whether an output live wire switch of the charging pile is adhered or not;
The circuit further comprises a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a third diode D3 and an optocoupler, wherein the fourth resistor R4 is connected with an anode of an input end of the optocoupler, a cathode of the input end of the optocoupler is connected with an anode of the third diode D3, and a cathode of the third diode D3 is connected with the fifth resistor R5; the output end of the optocoupler is respectively connected with a sixth resistor R6 and a second detection port, and the second detection port is connected to a singlechip acquisition pin and used for judging whether an output zero line switch of the charging pile is adhered or not.
In the embodiment of the invention, a first switch K1, a second switch K2, a fourth resistor R4 and a fifth resistor R5 are respectively connected with an alternating current output end of a charging pile.
In the embodiment of the invention, the controller is electrically connected with the battery management system and is used for obtaining the information of the charging voltage and the charging current of the battery pack.
As shown in fig. 3, the invention also discloses 7 deformation circuits, the principle of which is similar to the working principle of the invention; the port-deforming circuit 1 shown in the figure is a deforming circuit of a first detection port, and the first detection port can be connected with an operational amplifier to improve voltage gain, so that the signal acquisition of a second detection port is more accurate; the deformation circuit 1-6 of the second port is shown as a deformation circuit of the second detection port, and the voltage stabilizing effect of the second detection port is adjusted according to different detection environments by adding the fourth diode D4 and changing the connection mode of the third diode D3.
As shown in fig. 2, the invention also discloses a control method of the adhesion detection and short circuit detection circuit, which is applied to the adhesion detection and short circuit detection circuit and comprises the following steps:
S1: before starting charging, the controller controls the first switch K1 and the second switch K2 to be closed;
s2: judging whether an output live wire switch of the charging pile is adhered or not through waveforms of the first detection port;
S21: if the waveform of the first detection port is constant direct-current voltage Vcc, a live wire switch of the charging pile is not adhered;
S22: if the waveform of the first detection port is pulse superposition direct-current voltage Vcc×R2/(R2+R3), the live wire switch of the charging pile is adhered;
S23: if the waveform of the first detection port is constant direct-current voltage Vcc× (R1+R2)/(R1+R2+R3), the zero line and the live line of the output side of the charging pile are short-circuited;
S4: the controller controls the first switch K1 and the second switch K2 to be opened;
s5: the controller controls the closing of the charging pile live wire switch;
S6: judging whether an output zero line switch of the charging pile is adhered or not through waveforms of the second detection port;
s61: if the pulse is the pulse with the amplitude of Vcc, the zero line switch of the charging pile is adhered;
s62: if the voltage is constant direct-current voltage Vcc, a zero line switch of the charging pile is not adhered;
s7: the controller controls the disconnection of the charging pile live wire switch;
s71: if no adhesion or short circuit is detected in both step S2 and step S6, entering a control guidance phase;
S72: if step S2 or step S6 detects adhesion or short circuit, the controller controls to give an alarm.
The circuit can effectively detect the adhesion and short-circuit faults of the output side of the charging pile according to the whole working process.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. An adhesion detection and short circuit detection circuit, characterized in that: the device comprises a controller, a first switch (K1), a second switch (K2), a first resistor R1, a second resistor R2, a third resistor R3, a first diode (D1) and a second diode (D2), wherein the first switch (K1) and the second switch (K2) respectively comprise a control end and a contact end, the contact end of the first switch (K1) is connected with the first resistor R1 in series, the control ends of the first switch (K1) and the second switch (K2) are respectively connected with the controller, the contact end of the second switch (K2) is connected with one end of the second resistor R2 in series, and the other end of the second resistor R2 is respectively connected with the third resistor R3, the anode of the first diode (D1), the cathode of the second diode (D2) and a first detection port;
the circuit further comprises a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a third diode (D3) and an optocoupler, wherein the fourth resistor R4 is connected with an anode of an input end of the optocoupler, a cathode of the input end of the optocoupler is connected with the anode of the third diode (D3), and a cathode of the third diode (D3) is connected with the fifth resistor R5; the output end of the optocoupler is respectively connected with a sixth resistor R6 and a second detection port;
the first switch (K1), the second switch (K2), the fourth resistor (R4) and the fifth resistor R5 are respectively connected with the alternating current output end of the charging pile.
2. The adhesion detection and short circuit detection circuit of claim 1, wherein: the controller is electrically connected with the battery management system and is used for obtaining information of charging voltage and current of the battery pack.
3. A control method of an adhesion detection and short circuit detection circuit is characterized in that: application to the adhesion detection and short circuit detection circuit of any one of claims 1-2;
The method comprises the following steps:
s1: before starting charging, the controller controls to close the first switch (K1) and the second switch (K2);
s2: judging whether an output live wire switch of the charging pile is adhered or not through waveforms of the first detection port;
s3: the controller controls the first switch (K1) and the second switch (K2) to be opened;
s4: the controller controls the closing of the charging pile live wire switch;
S5: judging whether an output zero line switch of the charging pile is adhered or not through waveforms of the second detection port;
s6: the controller controls the disconnection of the charging pile live wire switch.
4. The method for controlling the adhesion detection and short-circuit detection circuit according to claim 3, wherein the step S2 comprises the steps of:
S21: if the waveform of the first detection port is constant direct-current voltage Vcc, a live wire switch of the charging pile is not adhered;
S22: if the waveform of the first detection port is pulse superposition direct-current voltage Vcc×R2/(R2+R3), the live wire switch of the charging pile is adhered;
s23: if the waveform of the first detection port is a constant direct-current voltage vcc× (r1+r2)/(r1+r2+r3), the zero line and the live line on the output side of the charging pile are short-circuited.
5. The method for controlling the adhesion detection and short-circuit detection circuit according to claim 3, wherein the step S5 comprises the steps of:
s51: if the pulse is the pulse with the amplitude of Vcc, the zero line switch of the charging pile is adhered;
s52: if the voltage is constant direct-current voltage Vcc, the zero-line switch of the charging pile is not adhered.
6. The method for controlling the adhesion detection and short-circuit detection circuit according to claim 3, wherein the step S6 further comprises the steps of:
S61: if no adhesion or short circuit is detected in both step S2 and step S5, entering a control guidance phase;
s62: if step S2 or step S5 detects adhesion or short circuit, the controller controls to give an alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010363689.XA CN113589194B (en) | 2020-04-30 | 2020-04-30 | Adhesion detection and short circuit detection circuit and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010363689.XA CN113589194B (en) | 2020-04-30 | 2020-04-30 | Adhesion detection and short circuit detection circuit and control method thereof |
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| CN113589194A CN113589194A (en) | 2021-11-02 |
| CN113589194B true CN113589194B (en) | 2024-05-28 |
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