CN208383991U - A kind of impedance loop test macro of direct-current charging post - Google Patents
A kind of impedance loop test macro of direct-current charging post Download PDFInfo
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- CN208383991U CN208383991U CN201821066194.5U CN201821066194U CN208383991U CN 208383991 U CN208383991 U CN 208383991U CN 201821066194 U CN201821066194 U CN 201821066194U CN 208383991 U CN208383991 U CN 208383991U
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Abstract
The utility model discloses a kind of impedance loop test macros of direct-current charging post, including charging pile charging module simulator, the first D.C. contactor, the second D.C. contactor, DC current source, governor circuit and voltage measuring apparatus, charging pile charging module simulator includes direct-current switch power supply and third D.C. contactor.The direct current output impedance loop of charging pile can be obtained in a kind of impedance loop test macro of direct-current charging post, improves testing efficiency, reduces energy consumption needed for test.In addition, when test loop impedance, charging module directly original with charging pile charging module simulator replacement charging pile is not required to manual line.
Description
Technical field
The utility model relates to charging pile field, the impedance loop test macro of especially a kind of direct-current charging post.
Background technique
Currently, since the charging current that the loop of power circuit of charging pile exports is bigger, for each in loop of power circuit
The contact impedance requirement of tie point is small as far as possible, and the satisfactory lug plate of contact area is selected from design, is required from technique
The screw of junction will compress, and still, for industrial production, guarantee that each screw can compress and be difficult to control.Therefore, charging pile
In testing process, whether the wiring for needing to test in the loop of power circuit of charging pile is good.Current a kind of test method are as follows: pass through
Torque is measured, and does setting-out mark, but since overlapped points are relatively more, it is easy to test leakage, efficiency are also very low.Another test side
Method is the external high power load of charging pile, then controls charging pile output electric current at full capacity, by measure the temperature rise of overlapped points come
Verifying, this method can directly reflect the connection status of loop of power circuit, but time-consuming and energy consumption is relatively high, and loop of power circuit
Impedance it is larger when, high power load charging fever is easy to cause safety accident.
Utility model content
In order to solve the above-mentioned technical problem, the purpose of the utility model is to provide a kind of surveys of the impedance loop of direct-current charging post
Test system for improving the impedance loop testing efficiency of charging pile, and reduces energy consumption needed for test.
The technical scheme adopted by the utility model is a kind of impedance loop test macro of direct-current charging post, including fill
Electric stake charging module simulator, the first D.C. contactor, the second D.C. contactor, DC current source, governor circuit and voltage
Measuring device, the charging pile charging module simulator include direct-current switch power supply and third D.C. contactor, the direct current
The of charging module of the Switching Power Supply as charging pile, the first output end of the direct-current switch power supply and third D.C. contactor
The connection of one normally opened contact, the second output terminal of the direct-current switch power supply and the second normally opened contact of third D.C. contactor connect
It connects, the first output end of the direct-current switch power supply is connect with the first normally opened contact of the first D.C. contactor, and the direct current is opened
The second output terminal in powered-down source is connect with the first normally opened contact of the second D.C. contactor, and the second of first D.C. contactor
The connection of first output end of normally opened contact and DC current source, the second normally opened contact and direct current of second D.C. contactor
The second output terminal in stream source connects, the second normally opened contact of first D.C. contactor, the second D.C. contactor second often
It opens contact to connect with voltage measuring apparatus, coil, the coil of the second D.C. contactor, third of first D.C. contactor
The coil of D.C. contactor is connect with governor circuit.
Further, the DC current source, voltage measuring apparatus are connect with governor circuit.
Further, the impedance loop test macro further includes host computer, and the host computer is connect with governor circuit.
Further, the voltage measuring apparatus is voltmeter.
Further, the governor circuit includes single-chip microcontroller.
The beneficial effects of the utility model are:
A kind of impedance loop test macro of direct-current charging post of the utility model, including charging pile charging module simulation dress
It sets, the first D.C. contactor, the second D.C. contactor, DC current source, governor circuit and voltage measuring apparatus, charging pile charge
Module simulation device includes direct-current switch power supply and third D.C. contactor, and DC current source is added in the output of direct-current switch power supply
End, and the voltage at the output end both ends using voltage measuring apparatus measurement direct-current switch power supply, the direct current that charging pile can be obtained are defeated
Impedance loop out overcomes the technical problem that existing impedance loop testing efficiency is low and energy consumption is high, improves testing efficiency, reduces and survey
Energy consumption needed for examination.In addition, when test loop impedance, using direct-current switch power supply as the charging module of charging pile, directly with filling
The original charging module of electric stake charging module simulator replacement charging pile, is not required to manual line, can further improve test effect
Rate.
The utility model can be widely applied to the impedance loop test macro of charging pile testing field, especially charging pile.
Detailed description of the invention
Specific embodiment of the present utility model is described further with reference to the accompanying drawing:
Fig. 1 is an a kind of specific embodiment schematic diagram of the impedance loop test macro of direct-current charging post of the utility model.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
It is an a kind of specific embodiment of the impedance loop test macro of direct-current charging post of the utility model with reference to Fig. 1, Fig. 1
Schematic diagram is tested in order to facilitate impedance loop, raising testing efficiency, in the present embodiment, provides a kind of circuit of direct-current charging post
Impedance test system, wherein straight using the original charging module of charging pile charging module simulator substitution charging pile and third
Current relay, specifically, the impedance loop test macro of direct-current charging post includes charging pile charging module simulator, first straight
Flow contactor K1, the second D.C. contactor K2, DC current source DC, governor circuit and voltage measuring apparatus, charging pile charging mould
Block simulator includes direct-current switch power supply and third D.C. contactor K3, uses direct-current switch power supply in simulator as filling
The charging module of electric stake, in the present embodiment, the first D.C. contactor K1, the second D.C. contactor K2 and third D.C. contactor K3
It is arranged inside direct-current charging post；Direct-current switch power supply is 500V direct-current switch power supply.First output end of direct-current switch power supply
It is connect with the first normally opened contact of third D.C. contactor K3, the second output terminal and third D.C. contactor of direct-current switch power supply
The second normally opened contact of K3 connects, the first normally opened contact of the first output end of direct-current switch power supply and the first D.C. contactor K1
Connection, the second output terminal of direct-current switch power supply are connect with the first normally opened contact of the second D.C. contactor K2, and the first direct current connects
The second normally opened contact of tentaculum K1 is connect with the positive output end of DC current source DC, the second normally opened touching of the second D.C. contactor K2
Point is connect with the negative output terminal of DC current source DC, the second normally opened contact, the second D.C. contactor of the first D.C. contactor K1
The second normally opened contact of K2 is connect with voltage measuring apparatus, the coil of the first D.C. contactor K1, the second D.C. contactor K2
Coil, third D.C. contactor K3 coil connect with governor circuit.
With reference to Fig. 1, the original charging module of charging pile uses pluggable design, has jointing, carries out impedance loop
When test, the original charging module of charging pile is pulled out, accesses charging pile charging module simulator, charging pile charging module mould
Quasi- device has quick connecting interface, can realize with charging pile rest part and quickly connect, substitute the original charging of charging pile
Module.Charging pile charging module simulator further includes CAN bus, for connecting the charging mould of direct-current switch power supply and charging pile
Block monitoring unit, charging module monitoring unit are used to monitor the work of direct-current switch power supply, charging module monitoring unit and charging
The governor circuit connection of stake, the governor circuit of charging pile and the governor circuit of test macro connect, to obtain direct-current switch power supply
Working condition can carry out impedance loop test when direct-current switch power supply does not export.The direct current output of direct-current charging post is returned
The anti-measurement method of roadlock is using electric bridge four-wire method principle, and DC current source DC is applied in the output end of the loop of power circuit of charging pile
Add virtual load electric current 50A, and can be conversed and be filled in the pressure drop of the output end of charging pile loop of power circuit with voltage measuring apparatus measurement
The conduction impedance of the electric entire charge circuit of stake, it is abnormal caused by avoiding any position crimping not firm.Pass through measurement charging output
The impedance (the sum of each overlapped points contact resistance and conductor resistance) in circuit, the general difference of conductor resistance is little, if measure
Impedance loop is bigger, is more than empirical value (for example, impedance loop empirical value of the 120KW output power with 7m rifle line is 8m Ω),
It may determine that being that overlapped points contact resistance is higher, so that it is determined that the tie point of loop of power circuit, which has, crimps not tight phenomenon.Specifically
Ground, when applying DC current, it is ensured that entire loop of power circuit is closed state, when doing loop-around test, governor circuit output
The first D.C. contactor K1, the second D.C. contactor K2, third D.C. contactor the K3 closure of signal output control loop are controlled,
DC current source DC output current, then detect by voltage measuring apparatus the voltage at its loop of power circuit output end both ends, then root
Resistance value is calculated according to Ohm's law.It does not need to use high power load, checks that power returns in the way of measurement loop resistance
The crimping situation of each tie point on road, it is more efficient relative to temperature rise and torgue measurement, it is more energy efficient；Automation can be achieved to survey
Examination, is not required to handmarking；In addition, being exported by DC current source, carried relative to high-power band, power consumption is smaller, saves energy consumption；
Overcome the technical problem that existing impedance loop testing efficiency is low and energy consumption is high.Using charging pile charging module simulator, protect
Charging circuit, the communication line for having demonstrate,proved charging pile are normal, so that test loop forms closed circuit, meet test condition；And
It no longer needs to connect the line between charging module and third D.C. contactor manually, saves the line time, can further mention
The efficiency of high impedance loop test.
As the further improvement of technical solution, with reference to Fig. 1, test macro further includes that charging gun plug and charging gun are inserted
The positive connecting pin of power supply and the negative connecting pin of power supply are respectively arranged in the interface of seat, charging gun plug and charging gun socket, first is straight
The second normally opened contact of stream contactor K1 is connect with the positive connecting pin of the power supply of charging gun plug, and the second of the second D.C. contactor K2
Normally opened contact is connect with the negative connecting pin of the power supply of charging gun plug, the positive connecting pin of the power supply of charging gun plug and charging gun socket
The positive connecting pin connection of power supply, the negative connecting pin of the power supply of charging gun plug connect with the negative connecting pin of the power supply of charging gun socket, charges
The positive connecting pin of the power supply of rifle socket, the negative connecting pin of power supply are connect with DC current source, voltage measuring apparatus.It is inserted by charging gun
Head is with charging gun socket, it can be achieved that the quick connection of measurement circuit, can effectively improve testing efficiency.
As the further improvement of technical solution, with reference to Fig. 1, voltage measuring apparatus is DC small signal measuring device, this
In embodiment, voltage measuring apparatus uses voltmeter.Governor circuit includes single-chip microcontroller, specifically, STM32F207ZET6 can be used
The single-chip microcontroller of model is realized.DC current source is connect with governor circuit so that governor circuit obtains the electricity of DC current source output
Size is flowed, voltage measuring apparatus is connect sending voltage measurement signal to governor circuit with governor circuit, the specific course of work
In, since governor circuit has obtained the output current value of DC current source, when governor circuit gets the electricity of voltage measuring apparatus
After pressing measuring signal, according to Ohm's law, resistance value can be calculated.The artificial calculating time is saved, help improves test effect
Rate.Display circuit can also be arranged in test macro, and the output end of governor circuit and the input terminal of display circuit connect, display circuit
It can show the resistance value that governor circuit is calculated, quickly know loop resistance values for staff.In addition, impedance loop is surveyed
Test system further includes host computer, and host computer is connect with governor circuit, and host computer can be realized using computer.Governor circuit can be with
Output current value, the voltage measurement signal for the DC current source that will acquire are sent to host computer and are handled, host computer according to
Loop resistance values can be calculated in current value and voltage value, and are shown.
It is to be illustrated to the preferable implementation of the utility model, but the invention is not limited to the reality above
Example is applied, those skilled in the art can also make various equivalent variations without departing from the spirit of the present invention
Or replacement, these equivalent deformations or replacement are all included in the scope defined by the claims of the present application.
Claims (5)
1. a kind of impedance loop test macro of direct-current charging post, which is characterized in that including charging pile charging module simulator,
First D.C. contactor, the second D.C. contactor, DC current source, governor circuit and voltage measuring apparatus, the charging pile fill
Electric module simulation device includes direct-current switch power supply and third D.C. contactor, and the direct-current switch power supply is filled as charging pile
Electric module, the first output end of the direct-current switch power supply are connect with the first normally opened contact of third D.C. contactor, described straight
The second output terminal of current switching power supply is connect with the second normally opened contact of third D.C. contactor, and the of the direct-current switch power supply
One output end is connect with the first normally opened contact of the first D.C. contactor, the second output terminal of the direct-current switch power supply and second
First normally opened contact of D.C. contactor connects, and the of the second normally opened contact of first D.C. contactor and DC current source
The connection of one output end, the second normally opened contact of second D.C. contactor and the second output terminal of DC current source connect, institute
Second normally opened contact of the second normally opened contact, the second D.C. contactor of stating the first D.C. contactor connects with voltage measuring apparatus
Connect, the coil of first D.C. contactor, the coil of the second D.C. contactor, third D.C. contactor coil and master control
Circuit connection.
2. the impedance loop test macro of direct-current charging post according to claim 1, which is characterized in that the DC current
Source, voltage measuring apparatus are connect with governor circuit.
3. the impedance loop test macro of direct-current charging post according to claim 2, which is characterized in that the impedance loop
Test macro further includes host computer, and the host computer is connect with governor circuit.
4. the impedance loop test macro of direct-current charging post according to claim 1, which is characterized in that the voltage measurement
Device is voltmeter.
5. the impedance loop test macro of direct-current charging post according to any one of claims 1 to 4, which is characterized in that institute
Stating governor circuit includes single-chip microcontroller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821066194.5U CN208383991U (en) | 2018-07-05 | 2018-07-05 | A kind of impedance loop test macro of direct-current charging post |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821066194.5U CN208383991U (en) | 2018-07-05 | 2018-07-05 | A kind of impedance loop test macro of direct-current charging post |
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| Publication Number | Publication Date |
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| CN208383991U true CN208383991U (en) | 2019-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821066194.5U Active CN208383991U (en) | 2018-07-05 | 2018-07-05 | A kind of impedance loop test macro of direct-current charging post |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111884288A (en) * | 2020-07-23 | 2020-11-03 | 广东电网有限责任公司清远供电局 | Power supply circuit based on semiconductor switch and control method thereof |
-
2018
- 2018-07-05 CN CN201821066194.5U patent/CN208383991U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111884288A (en) * | 2020-07-23 | 2020-11-03 | 广东电网有限责任公司清远供电局 | Power supply circuit based on semiconductor switch and control method thereof |
| CN111884288B (en) * | 2020-07-23 | 2023-09-08 | 广东电网有限责任公司清远供电局 | Power supply circuit based on semiconductor switch and control method thereof |
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