CN108732456A - A kind of direct-current charging interface of electric automobile connection status detector - Google Patents
A kind of direct-current charging interface of electric automobile connection status detector Download PDFInfo
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- CN108732456A CN108732456A CN201810539774.XA CN201810539774A CN108732456A CN 108732456 A CN108732456 A CN 108732456A CN 201810539774 A CN201810539774 A CN 201810539774A CN 108732456 A CN108732456 A CN 108732456A
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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
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/68—Testing of releasable connections, e.g. of terminals mounted on a printed circuit board
- G01R31/69—Testing of releasable connections, e.g. of terminals mounted on a printed circuit board of terminals at the end of a cable or a wire harness; of plugs; of sockets, e.g. wall sockets or power sockets in appliances
Abstract
The invention discloses a kind of direct-current charging interface of electric automobile connection status detector, which includes test jack, for connecting charging gun to be measured；Test plug, for connecting vehicle DC charging socket to be measured；Test board, the connection status of each pin for testing the charging gun to be measured and the vehicle DC charging socket to be measured.The detector can charging gun and electric vehicle DC charging socket is intact do not dismantle in the case of carry out charging interface connection status detection, it judges whether there is and connects exception, and clear failure reason when exception occurs can be connected having, the safety and reliability for effectively ensuring electric vehicle charging, is conducive to the popularization and application of electric vehicle.
Description
Technical field
The present invention relates to electric vehicle charging technique field, more particularly to a kind of direct-current charging interface of electric automobile connects shape
State detector.
Background technology
A few days ago, the departments such as National Development and Reform Committee, National Energy Board, Ministry of Industry and Information, which combine, prints and distributes《Electric vehicle charging basis is set
Apply development guide (2015-2020)》And relevant departments print and distribute《About the finger for accelerating electric vehicle charging infrastructure construction
Lead opinion》Proposing the target of China's charging infrastructure development from now on is：It is built up to the year two thousand twenty and concentrates electric charging station 1.2 ten thousand
Seat disperses charging pile 4,800,000, meets the charge requirement of national 5,000,000 electric vehicles.State General Administration for Quality Supervision, national standard
The departments such as committee, the Department of Science and Technology have further issued 5 national standards such as electric vehicle charge interface and communication protocol of new revision again,
And it is formally executed on January 1st, 2016.Effective compatibility for solving charging pile and safety are asked in the promotion and implementation of new national standard
Topic promotes the simultaneously match of electric vehicle and charging pile to develop.
Country encourages and normal development electric vehicle industry makes the key technology of electric vehicle industry especially electric vehicle obtain
To being rapidly developed, but the technology for even lacking complete set requires and technology detection architecture.As electric vehicle fills
Electric facility is built on a large scale and application, the charging interface connectivity problem of electric car conduction charging connecting device become increasingly conspicuous,
It is mainly reflected in：It needs to carry out charging pile basic connecting test when checking and accepting after the completion of electrically-charging equipment construction；Electric vehicle day
In normal charging process, if there is charging connection exception, the problem of can not being clearly specifically charging pile side or electric vehicle side
Problem.And the connected sets of electric vehicle charge interface and charging communication reliability are related to the safety, steady of charging process
It is qualitative.Therefore, it is very necessary to the research of the test of the connection status of direct-current charging interface.
Therefore, a kind of direct-current charging interface of electric automobile testing scheme how is provided, it is ensured that the safety of electric vehicle charging
Property is those skilled in the art's technical problem urgently to be resolved hurrily.
Invention content
The object of the present invention is to provide a kind of direct-current charging interface of electric automobile connection status detectors, which can
Charging gun and electric vehicle DC charging socket is intact do not dismantle in the case of carry out charging interface connection status detection, judge
Whether there is connection exception, and clear abnormal cause when exception occurs can be connected having, effectively ensures that electric vehicle fills
The safety and reliability of electricity, is conducive to the popularization and application of electric vehicle.
In order to solve the above technical problems, the present invention provides a kind of detections of direct-current charging interface of electric automobile connection status
Instrument, including：
Test jack, for connecting charging gun to be measured；
Test plug, for connecting vehicle DC charging socket to be measured；
Test board, the connection of each pin for testing the charging gun to be measured and the vehicle DC charging socket to be measured
State.
Optionally, the test board includes：
Analog charge rifle circuit, the connection status of each pin for testing the vehicle DC charging socket to be measured；
Simulating vehicle DC charging socket circuit, the connection status of each pin for testing the charging gun to be measured；
Mode switch is used for switch test pattern, controls the analog charge rifle circuit and the simulating vehicle direct current
Charging socket circuit is successively attached state verification respectively.
Optionally, the analog charge rifle circuit includes：
First test branch, the company of the positive and negative pin of DC power supply for testing the vehicle DC charging socket to be measured
Connect state；
Second test branch, the connection shape of the protective grounding pin for testing the vehicle DC charging socket to be measured
State；
Imitating charger communication port, the connection shape of the communications pins for testing the vehicle DC charging socket to be measured
State；
Third tests branch, the first control connection pin and second for testing the vehicle DC charging socket to be measured
The connection status of control connection pin；
4th test branch, the company of the positive and negative pin of accessory power supply for testing the vehicle DC charging socket to be measured
Connect state.
Optionally, the first test branch includes：
Capacitance, the first diode, the second diode and the first single-pole double-throw switch (SPDT)；Wherein, one end of the capacitance with
The DC power supply of the vehicle DC charging socket to be measured bears pin and is connected, and the other end of the capacitance is respectively with the described 1st
The cathode of the anode of pole pipe and second diode is connected；Measuring car is waited for described in the non-moving end of first single-pole double-throw switch (SPDT)
The positive pin of DC power supply of DC charging socket is connected, the movable end of first single-pole double-throw switch (SPDT) it is selectable with it is described
The anode of the cathode of first diode or second diode is connected.
Optionally, the second test branch includes：
First power supply, first resistor, the first ammeter, the second single-pole double-throw switch (SPDT)；Wherein, the cathode of first power supply
With vehicle body it is connected, the anode of first power supply is connected with one end of the first resistor, the other end of the first resistor
It is connected with one end of first ammeter, the non-moving end of second single-pole double-throw switch (SPDT) is charged with the vehicle DC to be measured
The protective grounding pin of socket is connected, and the movable end of second single-pole double-throw switch (SPDT) is selectable with first ammeter
The other end or equipment it is connected.
Optionally, the third test branch includes：
Second source, second resistance, 3rd resistor and the 4th resistance；Wherein, the cathode of the second source with it is described
One end of 3rd resistor and one end of the 4th resistance are grounded after being connected, anode and the second resistance of the second source
One end be connected, the other end of the second resistance be connected with the other end of the 3rd resistor afterwards and the vehicle DC to be measured
First control connection pin of charging socket is connected, the other end of the 4th resistance and the vehicle DC charging socket to be measured
Second control connection pin be connected.
Optionally, the 4th test branch includes：
Third power supply, the 4th power supply, the 5th power supply, the 5th resistance and double-point double-throw switch；Wherein, the third power supply
Anode be connected with one end of the 5th resistance, the cathode of the 4th power supply is connected with the anode of the 5th power supply to be followed by
Ground, the non-moving end of the double-point double-throw switch are connected with the positive and negative pin of accessory power supply of the vehicle DC charging socket to be measured,
The selectable cathode phase with the other end and the third power supply of the 5th resistance of movable end of the double-point double-throw switch
Even or with the cathode of the anode of the 4th power supply and the 5th power supply it is connected.
Optionally, the simulating vehicle DC charging socket circuit includes：
First test interface, the connection status of the positive and negative pin of DC power supply for testing the charging gun to be measured；
5th test branch, the connection status of the protective grounding pin for testing the charging gun to be measured；
Simulated battery communication port, the connection status of the communications pins for testing the charging gun to be measured；
6th test branch, the first control connection for testing the charging gun to be measured confirm that pin and the second control connect
Connect the connection status for confirming pin；
Second test interface, the connection status of the positive and negative pin of the accessory power supply for testing the charging gun to be measured.
Optionally, the 5th test branch includes：
6th power supply, the 6th resistance, the second ammeter and third single-pole double-throw switch (SPDT)；Wherein, the 6th power supply is negative
Pole with connecing equipment, the 6th power supply anode be connected with one end of second ammeter, second ammeter it is another
End is connected with one end of the 6th resistance, the protection of the non-moving end of the third single-pole double-throw switch (SPDT) and the charging gun to be measured
Grounding pin is connected, the selectable other end or vehicle body with the 6th resistance of movable end of the third single-pole double-throw switch (SPDT)
Ground is connected.
Optionally, the 6th test branch includes：
7th resistance, the 8th resistance and the 7th power supply；Wherein, one end of the 7th resistance and the charging gun to be measured
First control connection confirm pin be connected, the other end of the 7th resistance is connected with the vehicle body, the 8th resistance
The second control connection of one end and the charging gun to be measured confirm that pin is connected, the other end of the 8th resistance and described the
The anode of seven power supplys is connected, and the other end of the 7th power supply is connected with the vehicle body.
Optionally, the mode switch includes：
First relay group, the connection for controlling the simulating vehicle DC charging socket circuit and the test jack
Break-make；
Second relay group, the connection break-make for controlling the analog charge rifle circuit and the test plug；
Logic controller carries out test pattern switching for controlling switching circuit.
Direct-current charging interface of electric automobile connection status detector provided by the present invention, including：Test jack, for connecting
Charging gun is surveyed in reception；Test plug, for connecting vehicle DC charging socket to be measured；Test board, for testing described to be measured fill
The connection status of each pin of electric rifle and the vehicle DC charging socket to be measured.
As it can be seen that direct-current charging interface of electric automobile connection status detector provided by the present invention, only needs respectively by the inspection
The test jack surveyed on instrument is connected with charging gun to be measured, after test plug is connected with vehicle DC charging socket to be measured, passes through
Test board tests the connection status of each pin of charging gun or vehicle DC charging socket, different to determine whether there is connection
Often, and can be when connection exception occur, the concrete reason being clearly abnormal clearly is specially the pin that electric vehicle is surveyed
Connecting fault or the pin connecting fault of charging gun side effectively ensure the safety and reliability of electric vehicle charging.And
When being tested using the detector, without dismantling electric vehicle DC charging socket and charging gun, to reduce detection
Workload is conducive to the popularization and application of electric vehicle.
Description of the drawings
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
The schematic diagram for the direct-current charging interface of electric automobile connection status detector that Fig. 1 is provided by the embodiment of the present invention；
The schematic diagram for the analog charge rifle circuit that Fig. 2 is provided by the embodiment of the present invention；
The schematic diagram for the simulating vehicle DC charging socket circuit that Fig. 3 is provided by the embodiment of the present invention.
Specific implementation mode
Core of the invention is to provide a kind of direct-current charging interface of electric automobile connection status detector, which can
Charging gun and electric vehicle DC charging socket is intact do not dismantle in the case of carry out charging interface connection status detection, judge
Whether there is connection exception, and clear abnormal cause when exception occurs can be connected having, effectively ensures that electric vehicle fills
The safety and reliability of electricity, is conducive to the popularization and application of electric vehicle.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to FIG. 1, the direct-current charging interface of electric automobile connection status detector that Fig. 1 is provided by the embodiment of the present invention
Schematic diagram；With reference to figure 1 it is found that the detector includes：Test jack 101, test plug 102 and test board 103；
Test jack 101 is for connecting charging gun to be measured, to outer pin, i.e., the pin and reality that are connected with charging gun to be measured
The pin of the vehicle DC charging socket of border production application is identical.Test plug 102 is inserted for connecting vehicle DC charging to be measured
Seat is connected, to outer pin, i.e., the charging gun of the pin and production application that are connected with vehicle DC charging socket to be measured
Pin is identical.
Test board 103 is used for each of the connection status of each pin of charging gun to be measured and vehicle DC charging socket to be measured
The connection status of pin is tested.Specifically, when test jack 101 and test plug 102 respectively with charging gun to be measured and
When vehicle DC charging socket to be measured is connected, the test circuit inside test board 103 is distinguished via test jack and test plug
It establishes and connects with each pin of charging gun to be measured and vehicle DC charging socket to be measured, and then filled to be measured using the test circuit
The connection status of each pin of electric rifle and vehicle DC charging socket to be measured is tested, by the output electricity for analyzing each pin
Situations such as pressure, output current, judge whether each pin is connected to.
Optionally, test board 103 may include：Analog charge rifle circuit, for testing vehicle DC charging socket to be measured
Each pin connection status；Simulating vehicle DC charging socket circuit, the connection of each pin for testing charging gun to be measured
State；Mode switch is used for switch test pattern, with successively respectively to charging gun to be measured and vehicle DC charging socket to be measured
Each pin be attached test.
Specifically, in the present embodiment, the test circuit inside test board 103 includes analog charge rifle circuit and simulating vehicle
DC charging socket circuit, to detect the connection of each pin of vehicle DC charging socket to be measured using analog charge rifle circuit
State judges whether the interlock circuit for connecting each pin of the vehicle DC charging socket to be measured is normal；It is straight using simulating vehicle
Current charge socket circuit detects the connection status of each pin of charging gun to be measured, judges each pin for connecting the charging gun to be measured
Whether interlock circuit is normal.In addition, being laid out to simplify circuit structure, reducing cost, above-mentioned two test circuit is provided with shared electricity
Sub- device.And in order to avoid above-mentioned two test circuit is carried out at the same time test and generates and influences each other, cause test inaccurate.Cause
This, test board 103 can also include mode switch, which can make above-mentioned two tests electricity by switch test pattern
Road successively works respectively, i.e., does not work at the same time, respectively to each pin of charging gun to be measured and vehicle DC charging socket to be measured into
Row connecting test influences each other without generating.Wherein, for the specific testing sequence of above-mentioned two test circuit, the present invention is not done
It is unique to limit, it determines according to actual needs.In addition, in conjunction with practical application request, it can also be only therein a certain to utilizing
Test circuit is tested, for example, each pin for only being treated measuring car DC charging socket using analog charge rifle circuit is carried out
Test.
Optionally, analog charge rifle circuit may include：First test branch is inserted for testing vehicle DC charging to be measured
The connection status of the positive and negative pin of DC power supply of seat；Second test branch, the guarantor for testing vehicle DC charging socket to be measured
Protect the connection status of grounding pin；Imitating charger communication port, the communication for testing vehicle DC charging socket to be measured are drawn
The connection status of foot；Third tests branch, the first control connection pin for testing the vehicle DC charging socket to be measured
With the connection status of the second control connection pin；4th test branch, the auxiliary for testing vehicle DC charging socket to be measured
The connection status of the positive and negative pin of power supply.
Specifically, the pin of vehicle DC charging socket to be measured include the positive and negative pin of DC power supply, protective grounding pin,
The positive and negative pin of communications pins, accessory power supply, the first control connection pin and the second control connection pin.Then, the present embodiment
Above-mentioned all kinds of pins are tested respectively by different test branches.Referring to FIG. 2, Fig. 2 is carried by the embodiment of the present invention
The schematic diagram of the analog charge rifle circuit of confession.
According to Fig. 2：First, which tests branch, may include：Capacitance C, the first diode D1, the second diode D2 and
First single-pole double-throw switch (SPDT) S1；Wherein, one end of capacitance C and the DC power supply of vehicle DC charging socket to be measured bear pin phase
Even, the other end of capacitance C is connected with the cathode of the anode of the first diode D1 and the second diode D2 respectively；First hilted broadsword is double
Throw switch S1Non-moving end be connected with the positive pin of DC power supply of vehicle DC charging socket to be measured, the first single-pole double-throw switch (SPDT) S1
Movable end it is selectable withFirstThe anode of the cathode of diode D1 or the second diode D2 are connected.
Based on foregoing circuit structure, the test process of the first test branch is：First single-pole double-throw switch (SPDT) S1It is movable
End is connected with the anode of the second diode D2, i.e., is capacitance C chargings, when the voltage of capacitance C is slightly above vehicle after being connected with contact 2
When power battery voltage, when such as the voltage of capacitance C being 450V, by the first single-pole double-throw switch (SPDT) S1Movable end and the one or two
The cathode of pole pipe D1 is connected, i.e., is connected with contact 1.At this point, the first switch K5 of vehicle side and second switch K6 are closed, if waiting for
The positive and negative pin connection of DC power supply of measuring car DC charging socket, then the first diode D1 forward conductions, capacitance C are put at this time
Electricity, capacitance C voltage reduce and are finally maintained at the cell voltage of vehicle side.To by the voltage feelings for analyzing the both ends capacitance C
Condition can judge the connection status of the positive and negative pin of DC power supply of vehicle DC charging socket to be measured.
Second, which tests branch, may include：First power supply U1, first resistor R1, the first ammeter A1 and the second hilted broadsword it is double
Throw switch S2；Wherein, the first power supply U1Cathode with vehicle body be connected, the first power supply U1Anode with first resistor R1One end
It is connected, first resistor R1The other end be connected with one end of the first ammeter A1, the second single-pole double-throw switch (SPDT) S2Non-moving end with wait for
The protective grounding pin of measuring car DC charging socket is connected, the second single-pole double-throw switch (SPDT) S2Movable end it is selectable with first
The other end of ammeter A1 or equipment it is connected.
Based on foregoing circuit structure, the test process of the second test branch is：Second single-pole double-throw switch (SPDT) S2It is movable
End is connected with the other end of the first ammeter A1, i.e., after being connected with contact 4, reads the registration of the first ammeter A1, if the first electricity
The registration of flow table A1 and the first power supply U1With first resistor R1The numerical value being calculated by Ohm's law is unanimous on the whole, for example, working as
First power supply U1For 5V, first resistor R1For 5 Ω when, if the registration of the first ammeter A1 is 1A, or when differing less with 1A,
The then protective grounding pin connection of vehicle DC charging socket to be measured.If the registration of the first ammeter A1 is zero, vehicle to be measured
The protective grounding pin of DC charging socket is not connected to.
Third tests branch：Second source U2, second resistance R2, 3rd resistor R3And the 4th resistance R4；The
Two power supply U2Cathode and 3rd resistor R3One end and the 4th resistance R4One end be connected after be grounded, second source U2Anode
With second resistance R2One end be connected, second resistance R2The other end and 3rd resistor R3The other end be connected after with vehicle to be measured
First control connection pin of DC charging socket is connected, the 4th resistance R4The other end and vehicle DC charging socket to be measured
Second control connection pin is connected.
Based on foregoing circuit structure, the test process of third test branch is：Test plug 101 and vehicle DC to be measured
After charging socket connection, whether the voltage for detecting the first controlling switch of vehicle DC charging socket to be measured is consistent with preset value,
Wherein, the preset value is related to the voltage value of third test each constituent element of branch or resistance value, for example, working as second source U2For
12V, second resistance R2, 3rd resistor R3And the 4th resistance R4When being 1000 Ω, which is 4V.If vehicle to be measured is straight
The voltage and 4V of first controlling switch of current charge socket are unanimous on the whole, i.e., both difference within the allowable range when, vehicle to be measured
First controlling switch of DC charging socket is connected to.On the contrary, not being connected to then.Detect the second control of vehicle DC charging socket to be measured
Whether the voltage-to-ground of system connection pin is preset value, and the voltage or resistance value of the preset value and vehicle side circuit element have
Close, i.e., with U' shown in Fig. 22、R'5Value it is related, work as U'2For 12V, R'5And the 4th resistance R4When being 1000 Ω, the preset value
For 6V.If the voltage-to-ground of the second control connection pin of vehicle DC charging socket to be measured is 6V, or when close to 6V, should
Second control connection pin connection of vehicle DC charging socket to be measured；On the contrary, not being connected to then.
4th, which tests branch, includes：Third power supply U3, the 4th power supply U4, the 5th power supply U5, the 5th resistance R5And double-pole is double
Throw switch S3；Third power supply U3Anode with the 5th resistance R5One end be connected, the 4th power supply U4Cathode and the 5th power supply U5's
Anode is grounded after being connected, double-point double-throw switch S3The accessory power supply of non-moving end and vehicle DC charging socket to be measured positive and negative draw
Foot is connected, double-point double-throw switch S3Movable end it is selectable with the 5th resistance R5The other end and third power supply U3Cathode phase
Even or with the 4th power supply U4Anode and the 5th power supply U5Cathode be connected.
Based on foregoing circuit structure, the test process of the 4th test branch is：Double-point double-throw switch S3Movable end with
5th resistance R5The other end and third power supply U3Cathode be connected after, i.e., after being connected with contact 1' and contact 2', waited for if detecting
Voltage between the positive and negative pin of accessory power supply of measuring car DC charging socket decreased significantly compared with floating voltage, then waits for measuring car
The positive and negative pin of accessory power supply of DC charging socket is connected to.Conversely, not being connected to then.Wherein, when the 4th test branch is upper
When stating structure, in the voltage-to-ground of the second control connection pin for testing above-mentioned vehicle DC charging socket to be measured, needing will be double
Double-pole double throw switch S3With above-mentioned 5th resistance R5The other end and third power supply U3Cathode be connected, i.e., with 2 phase of contact 1 and contact
Even.
In addition, by imitating charger communication port, the connection of the communications pins of vehicle DC charging socket to be measured is tested
The process of state is：It, can be by the lateral analog charge of vehicle after test plug is connected with vehicle DC charging socket to be measured
Machine communication port sends message, or sends message from the imitating charger communication port to vehicle side, to be somebody's turn to do by analysis
Imitating charger communication port success receives or sends message, judges that the communications pins of vehicle DC charging socket to be measured are
No connection.If message can be properly received or be sent, the communications pins of vehicle DC charging socket to be measured are connected to, on the contrary, then
It is not connected to.
Optionally, simulating vehicle DC charging socket circuit may include：First test interface, for testing charging to be measured
The connection status of the positive and negative pin of DC power supply of rifle；5th test branch, the protective grounding pin for testing charging gun to be measured
Connection status；Simulated battery communication port, the connection status of the communications pins for testing charging gun to be measured；6th test branch
Road, the first control connection for testing charging gun to be measured confirm that pin and the second control connection confirm the connection status of pin；
Second test interface, the connection status of the positive and negative pin of the accessory power supply for testing charging gun to be measured.
Specifically, simulating vehicle DC charging socket circuit again by different test branches respectively to charging gun to be measured
All kinds of pins tested.Referring to FIG. 3, the simulating vehicle DC charging socket electricity that Fig. 3 is provided by the embodiment of the present invention
The schematic diagram on road.
In conjunction with Fig. 3, the connection status between the positive and negative pin of DC power supply of charging gun to be measured is tested by the first test interface
Mode be：After test jack is connected with charging gun to be measured, by the third switch for the pusher side that charges and the 4th switch, i.e., by Fig. 3
In K1 and K2 be closed, pass through the voltage value for detecting the first test interface, that is, detect voltage U12Numerical value can judge to be measured fill
The connection status of the positive and negative pin of DC power supply of electric rifle, if the voltage between the positive and negative pin of the DC power supply for measuring charging gun to be measured
Equal to charging voltage, then the positive and negative pin connection of the DC power supply of charging gun to be measured, if voltage is zero between two pins, is not connected to.
It is in such a way that simulated battery communication port tests the connection status of the communications pins of charging gun to be measured：Work as test
After socket is connected with charging gun to be measured, if simulated battery communication ends can receive or send out message, the communication of charging gun to be measured
Pin successful connection.Certainly, can also be judged in communication performance test whether testing the connection of the communications pins.
In such a way that the second test interface tests the connection status of positive and negative pin of the accessory power supply of charging gun to be measured
For：After test jack is connected with charging gun to be measured, if measuring the electric over the ground of the positive and negative pin of the accessory power supply of charging gun to be measured
Within the allowable range, the allowable range is related to internal circuit parameter for pressure.For example, the voltage-to-ground of the positive pin of accessory power supply is
The voltage-to-ground of 12V ± 0.6V, the negative pin of accessory power supply are-(12V ± 0.6V), then the positive and negative pin of the accessory power supply connects
It is logical.
Wherein, the 5th test branch may include：6th power supply U6, the 6th resistance R6, the second ammeter A2 and third list
Double-pole double throw switch S4；6th power supply U6Cathode with connecing equipment, the 6th power supply U6Anode and the second ammeter A2 one end phase
Even, the other end and the 6th resistance R of the second ammeter A26One end be connected, third single-pole double-throw switch (SPDT) S4Non-moving end with it is to be measured
The protective grounding pin of charging gun is connected, third single-pole double-throw switch (SPDT) S4Movable end it is selectable with the 6th resistance R6It is another
End or vehicle body be connected.
Based on foregoing circuit structure, the test process of the 5th test branch is：By third single-pole double-throw switch (SPDT) S4With
Six resistance R6It is connected, i.e., is connected with contact 5, by the registration for reading the second ammeter A2, you can judge the guarantor of charging gun to be measured
Whether shield grounding pin is connected.If the registration of the second ammeter A2 and the 6th power supply U6With the 6th resistance R6Pass through Ohm's law meter
Obtained value is unanimous on the whole, then the protective grounding pin is connected to.On the contrary, if the registration of the second ammeter A2 is zero, the guarantor
Shield grounding pin is not connected to.
6th, which tests branch, may include：7th resistance R7, the 8th resistance R8And the 7th power supply U7；7th resistance R7's
One end confirms that pin is connected with the first control connection of charging gun to be measured, the 7th resistance R7The other end with vehicle body be connected,
Eight resistance R8The second control connection of one end and charging gun to be measured confirm that pin is connected, the 8th resistance R8The other end and the 7th
Power supply U7Anode be connected, the 7th power supply U7Cathode with vehicle body be connected.
Based on foregoing circuit structure, the test process of the 6th test branch is：Test jack is connect with charging gun to be measured
Afterwards, if the second control connection for measuring charging gun to be measured confirms that the voltage-to-ground of pin is setting value, for example, by the 7th power supply U7
For 12V, the 7th resistance R7With the 8th resistance R8When being 1000 Ω, if measuring the second control connection confirms the electric over the ground of pin
Pressure is 6V, then the second control connection confirms pin connection.The third single-pole double-throw switch (SPDT) S for testing branch by the above-mentioned 5th4With
Vehicle body it is connected, if the first control for measuring charging gun to be measured confirms that the voltage of pin is setting value, e.g., the 7th power supply U7For
12V, the 7th resistance R7With the 8th resistance R8Be 1000 Ω, and charging gun internal resistance to be measured, i.e. R in Fig. 33' be also
When 1000 Ω, if the voltage for measuring the first control confirmation pin is 4V or smaller with 4V differences, pin connection.If surveying
The voltage zero that first control confirms pin is obtained, then the pin is not connected to.
Optionally, mode switch module may include：Simulating vehicle DC charging socket circuit is controlled with test jack to connect
Connect the first disconnected relay group；Control analog charge rifle circuit connect the second relay group of break-make with test plug；Control
Switching circuit carries out the logic controller of test pattern switching.
Specifically, above-mentioned simulating vehicle DC charging socket circuit is distinguished with analog charge rifle circuit by two group relays
It is controlled, when needing to test the connection status of each pin of charging gun to be measured, is then controlled and simulated by the first relay group
Vehicle DC charging socket circuit is connect with test jack, and then is connected with charging gun to be measured, while the second relay group controls
Analog charge rifle circuit is disconnected with test plug, and then is disconnected with vehicle DC charging socket to be measured.Work as needs
When testing the connection status of each pin of vehicle DC charging socket to be measured, then operation contrary to the above is carried out.In addition, logic
Controller can control switching circuit to realize the switching of test pattern when needing to carry out test pattern switching.
Further, when detecting that the connection of certain pin is abnormal, which can be flickered by indicator light or alarm
The mode for sending out the sound carries out connection abnormity prompt, so that testing staff repairs processing.
In conclusion direct-current charging interface of electric automobile connection status detector provided by the present invention, only need to respectively by
Test jack on the detector is connected with charging gun to be measured, after test plug is connected with vehicle DC charging socket to be measured,
The connection status that each pin of charging gun or vehicle DC charging socket is tested by test board, to determine whether there is connection
Exception, and can be when connection exception occurs, the concrete reason being clearly abnormal clearly is specially drawing for electric vehicle survey
Foot connecting fault or the pin connecting fault of charging gun side effectively ensure the safety and reliability of electric vehicle charging.
And when being tested using the detector, without dismantling electric vehicle DC charging socket and charging gun, to reduce inspection
Workload is surveyed, the popularization and application of electric vehicle are conducive to.
Direct-current charging interface of electric automobile connection status detector provided by the present invention is described in detail above.
Principle and implementation of the present invention are described for specific case used herein, and the explanation of above example is only used
In facilitating the understanding of the method and its core concept of the invention.It should be pointed out that for those skilled in the art,
Without departing from the principle of the present invention, can be with several improvements and modifications are made to the present invention, these improvement and modification
Fall into the protection domain of the claims in the present invention.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only that
A little elements, but also include the other elements being not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or equipment including element.
Claims (11)
1. a kind of direct-current charging interface of electric automobile connection status detector, which is characterized in that including：
Test jack, for connecting charging gun to be measured；
Test plug, for connecting vehicle DC charging socket to be measured；
Test board, the connection shape of each pin for testing the charging gun to be measured and the vehicle DC charging socket to be measured
State.
2. detector according to claim 1, which is characterized in that the test board includes：
Analog charge rifle circuit, the connection status of each pin for testing the vehicle DC charging socket to be measured；
Simulating vehicle DC charging socket circuit, the connection status of each pin for testing the charging gun to be measured；
Mode switch is used for switch test pattern, controls the analog charge rifle circuit and the simulating vehicle DC charging
Socket circuit is successively attached state verification respectively.
3. detector according to claim 2, which is characterized in that the analog charge rifle circuit includes：
First test branch, the connection shape of the positive and negative pin of DC power supply for testing the vehicle DC charging socket to be measured
State；
Second test branch, the connection status of the protective grounding pin for testing the vehicle DC charging socket to be measured；
Imitating charger communication port, the connection status of the communications pins for testing the vehicle DC charging socket to be measured；
Third tests branch, the first control connection pin for testing the vehicle DC charging socket to be measured and the second control
Connect the connection status of pin；
4th test branch, the connection shape of the positive and negative pin of accessory power supply for testing the vehicle DC charging socket to be measured
State.
4. detector according to claim 3, which is characterized in that described first, which tests branch, includes：
Capacitance, the first diode, the second diode and the first single-pole double-throw switch (SPDT)；Wherein, one end of the capacitance with it is described
The DC power supply of vehicle DC charging socket to be measured bears pin and is connected, the other end of the capacitance respectively with first diode
Anode and second diode cathode be connected；The non-moving end of first single-pole double-throw switch (SPDT) and the vehicle to be measured are straight
The positive pin of DC power supply of current charge socket is connected, and the movable end of first single-pole double-throw switch (SPDT) is selectable with described first
The anode of the cathode of diode or second diode is connected.
5. detector according to claim 3, which is characterized in that described second, which tests branch, includes：
First power supply, first resistor, the first ammeter, the second single-pole double-throw switch (SPDT)；Wherein, the cathode and vehicle of first power supply
Body it is connected, the anode of first power supply is connected with one end of the first resistor, the other end of the first resistor and institute
The one end for stating the first ammeter is connected, the non-moving end of second single-pole double-throw switch (SPDT) and the vehicle DC charging socket to be measured
Protective grounding pin be connected, the movable end of second single-pole double-throw switch (SPDT) is selectable another with first ammeter
End or equipment be connected.
6. detector according to claim 3, which is characterized in that the third tests branch and includes：
Second source, second resistance, 3rd resistor and the 4th resistance；Wherein, the cathode of the second source and the third
One end of resistance and one end of the 4th resistance are grounded after being connected, the anode of the second source and the one of the second resistance
End is connected, and the other end of the second resistance charges after being connected with the other end of the 3rd resistor with the vehicle DC to be measured
First control connection pin of socket is connected, and the of the other end of the 4th resistance and the vehicle DC charging socket to be measured
Two control connection pins are connected.
7. detector according to claim 3, which is characterized in that the described 4th, which tests branch, includes：
Third power supply, the 4th power supply, the 5th power supply, the 5th resistance and double-point double-throw switch；Wherein, the third power supply is being just
Pole is connected with one end of the 5th resistance, and the cathode of the 4th power supply is grounded after being connected with the anode of the 5th power supply,
The non-moving end of the double-point double-throw switch is connected with the positive and negative pin of accessory power supply of the vehicle DC charging socket to be measured, institute
The selectable cathode with the other end of the 5th resistance and the third power supply of movable end for stating double-point double-throw switch is connected
Or it is connected with the cathode of the anode of the 4th power supply and the 5th power supply.
8. detector according to claim 2, which is characterized in that the simulating vehicle DC charging socket circuit includes：
First test interface, the connection status of the positive and negative pin of DC power supply for testing the charging gun to be measured；
5th test branch, the connection status of the protective grounding pin for testing the charging gun to be measured；
Simulated battery communication port, the connection status of the communications pins for testing the charging gun to be measured；
6th test branch, the first control connection for testing the charging gun to be measured confirm that pin and the second control connection are true
Recognize the connection status of pin；
Second test interface, the connection status of the positive and negative pin of the accessory power supply for testing the charging gun to be measured.
9. detector according to claim 8, which is characterized in that the described 5th, which tests branch, includes：6th power supply, the 6th
Resistance, the second ammeter and third single-pole double-throw switch (SPDT)；Wherein, with connecing equipment, the described 6th is electric for the cathode of the 6th power supply
The anode in source is connected with one end of second ammeter, one end of the other end of second ammeter and the 6th resistance
It is connected, the non-moving end of the third single-pole double-throw switch (SPDT) is connected with the protective grounding pin of the charging gun to be measured, the third
The movable end of single-pole double-throw switch (SPDT) is selectable to be connected with the other end of the 6th resistance or vehicle body.
10. detector according to claim 8, which is characterized in that the described 6th, which tests branch, includes：
7th resistance, the 8th resistance and the 7th power supply；Wherein, the of one end of the 7th resistance and the charging gun to be measured
One control connection confirms that pin is connected, and the other end of the 7th resistance is connected with the vehicle body, the one of the 8th resistance
The second control connection with the charging gun to be measured is held to confirm that pin is connected, the other end of the 8th resistance and the 7th electricity
The anode in source is connected, and the other end of the 7th power supply is connected with the vehicle body.
11. detector according to claim 2, which is characterized in that the mode switch includes：
First relay group, it is logical for controlling the simulating vehicle DC charging socket circuit and the connection of the test jack
It is disconnected；
Second relay group, the connection break-make for controlling the analog charge rifle circuit and the test plug；
Logic controller carries out test pattern switching for controlling switching circuit.
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| CN201810539774.XA CN108732456A (en) | 2018-05-30 | 2018-05-30 | A kind of direct-current charging interface of electric automobile connection status detector |
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| CN201810539774.XA CN108732456A (en) | 2018-05-30 | 2018-05-30 | A kind of direct-current charging interface of electric automobile connection status detector |
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| CN112881951A (en) * | 2021-01-15 | 2021-06-01 | 上海闻泰信息技术有限公司 | Interface plug-in analog circuit |
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Effective date of registration: 20200509 Address after: 510663 Building 3, 4, 5 and 3 of Building J1, 11 Kexiang Road, Science City, Luogang District, Guangzhou City, Guangdong Province Applicant after: ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID Applicant after: CHINA SOUTHERN POWER GRID Co.,Ltd. Address before: 510663 Building 3, 4, 5 and 3 of Building J1, 11 Kexiang Road, Science City, Luogang District, Guangzhou City, Guangdong Province Applicant before: ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID |