CN110261681B - Contact impedance test terminal and contact impedance test method - Google Patents
Contact impedance test terminal and contact impedance test method Download PDFInfo
- Publication number
- CN110261681B CN110261681B CN201910646054.8A CN201910646054A CN110261681B CN 110261681 B CN110261681 B CN 110261681B CN 201910646054 A CN201910646054 A CN 201910646054A CN 110261681 B CN110261681 B CN 110261681B
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- 238000012360 testing method Methods 0.000 title claims abstract description 50
- 238000010998 test method Methods 0.000 title description 7
- 239000000758 substrate Substances 0.000 claims abstract description 16
- 238000003780 insertion Methods 0.000 claims description 11
- 230000037431 insertion Effects 0.000 claims description 11
- 238000002955 isolation Methods 0.000 claims description 8
- 238000005299 abrasion Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
-
- 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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Measuring Leads Or Probes (AREA)
Abstract
The contact impedance test terminal comprises an insulating substrate, and a first contact terminal and a second contact terminal which are formed on two sides of the insulating substrate, wherein the first contact terminal and the second contact terminal are electrically isolated through the insulating substrate, and the first contact terminal and the second contact terminal respectively comprise a first cambered surface contact part, a second cambered surface contact part, a first connecting part and a second connecting part; the application also provides a contact impedance testing method.
Description
Technical Field
The application relates to the field of test equipment, in particular to a contact impedance test terminal and a contact impedance test method.
Background
The charging gun is widely applied to electric automobile charging, and is equipped with the socket that charges of connection rifle in electric automobile inside, the socket that charges is including a plurality of transmission electric energy terminal, socket terminal is the jack structure generally, the rifle that charges is equipped with the contact pin and inserts in the jack, for making socket terminal with the contact pin cooperates better, usually set up a torsional spring in the jack and switch on socket terminal and contact pin's connection, and the torsional spring can wear out or yield after a large amount of plug, leads to the contact resistance between torsional spring and the contact pin to increase. The pins of the charging gun and the jacks of the socket are generally connected with cables, so that the resistance value is the sum of cable impedance, crimping impedance of the pins and the jacks and the cables, resistance value of the pins and the jacks and contact impedance of the jacks and the pins. The resistance value of the contact resistance is far smaller than the total resistance value, and the abrasion degree of the torsion spring cannot be judged by measuring the total resistance value. The test method according to the standard GB/T33594 has higher requirements on personnel quality and is convenient to realize in a laboratory, and the existing socket terminals of the electric vehicle are installed in the vehicle, so that the dismantling detection is too complicated, and a simple contact impedance test method is urgently needed to judge the wear degree of the torsion spring.
Disclosure of Invention
In view of the above, it is desirable to provide a contact impedance testing terminal and a contact impedance testing method that can simply test the contact impedance of a socket of an electric vehicle to determine the wear level of torsion springs in the socket.
In order to solve the technical problems, the application provides a contact impedance test terminal which comprises an insulating substrate, a first contact terminal and a second contact terminal, wherein the first contact terminal and the second contact terminal are formed on two sides of the insulating substrate, the first contact terminal and the second contact terminal are electrically isolated through the insulating substrate, and the first contact terminal and the second contact terminal respectively comprise a first cambered surface contact part, a second cambered surface contact part, a first connecting part and a second connecting part.
Preferably, the insulating substrate comprises a plate-shaped base, the first cambered surface contact part and the second cambered surface contact part are respectively positioned at two sides of the plate-shaped base, and the first cambered surface contact part and the plate-shaped base form a cylindrical structure.
Preferably, the front ends of the first cambered surface contact part and the second cambered surface contact part are provided with a first boss and a second boss, the front end of the plate-shaped base part is provided with a head part in an extending mode, a step part is formed between the head part and the plate-shaped base part, the first boss and the second boss are clamped on two sides of the step part, and the first boss, the second boss and the step part form a cylindrical structure.
Preferably, the first and second connection parts are formed on two sides of the head part by extending from front ends of the first and second bosses respectively.
Preferably, the outer diameters of the first and second bosses are larger than the outer diameters of the first and second cambered surface contact portions, the thickness of the head portion is larger than the thickness of the plate-shaped base portion, the width of the head portion is larger than the width of the plate-shaped base portion, the width of the step portion is equal to the width of the head portion, and the thickness of the step portion is equal to the thickness of the plate-shaped base portion.
Preferably, the first cambered surface contact portion extends backwards to form an insertion end, the plate-shaped base tail portion extends in the direction perpendicular to the plate-shaped base portion to form an isolation tail portion, the insertion end is located at the rear end of the isolation tail portion, and the insertion end is electrically isolated from the second cambered surface contact portion through the isolation tail portion.
Preferably, the insertion end constitutes a rear end of the entire test terminal and has an outer diameter gradually decreasing in a direction away from the plate-like base body.
Preferably, the first and second connection parts are connected with an impedance testing device, the contact impedance testing terminal is inserted into a torsion spring, so that the first and second contact terminals, the torsion spring and the impedance testing device form a loop, and the impedance testing device measures the impedance of the loop.
In order to solve the technical problem, the application also provides a contact impedance testing method, which comprises the steps of:
S01, providing an electric vehicle to be tested, wherein the electric vehicle to be tested is provided with a charging interface, a socket terminal is arranged in the charging interface, and a torsion spring is arranged in a jack of the socket terminal;
s02, inserting the contact impedance test terminal into the torsion spring, wherein the first contact terminal and the second contact terminal of the contact impedance test terminal are respectively in electrical contact with the contact surface of the torsion spring;
s03, providing a micro-ohm meter, and connecting the micro-ohm meter to the first connecting part and the second connecting part of the first contact terminal and the second contact terminal of the contact impedance test terminal;
S04, starting the micro-ohm meter, enabling the first contact terminal, the torsion spring, the second contact terminal and the micro-ohm meter to form a current loop, and measuring impedance of the current loop;
s05, judging whether the acquired impedance of the current loop is in a preset normal value range.
Preferably, the insulating substrate comprises a plate-shaped base, the first cambered surface contact part and the second cambered surface contact part are respectively positioned at two sides of the plate-shaped base, the first cambered surface contact part and the plate-shaped base form a cylindrical structure, and the first cambered surface contact part and the second cambered surface contact part are in contact with the contact surface of the torsion spring.
According to the contact impedance test terminal and the test method, the first contact part and the second contact part are formed on the insulating substrate at the same time, the first contact part and the second contact part are respectively contacted with the torsion spring in the electric vehicle to form a current loop, and the resistance value of the loop is measured through the micro-ohm meter, so that whether the torsion spring is in a normal abrasion state or not can be judged, and whether the torsion spring needs to be replaced or not can be judged.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application.
FIG. 1 is a perspective view of a contact impedance test terminal of the present application;
FIG. 2 is an exploded perspective view of the contact impedance test terminal of the present application;
FIG. 3 is a cross-sectional view of a contact impedance test terminal of the present application;
fig. 4 is a test state diagram and a partial enlarged view of the contact impedance test terminal of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings.
Referring to fig. 1 to 3, the contact impedance testing terminal a of the present application includes an insulating substrate 10 and first and second contact terminals 20 and 30 formed on two sides of the insulating substrate 10.
The insulating base 10 includes a plate-like base 11, an isolation tail 12 extending from a tail of the plate-like base 11 toward one side, and a head 13 extending from a front end of the plate-like base 11. The width of the head 13 is larger than the width of the plate-shaped base 11, and a step 14 is formed between the plate-shaped base 11 and the head 13, and the step 14 is equal to the head 13 in width. The thickness of the head 13 is greater than the thickness of the plate-shaped base 11, and the thickness of the step 14 is equal to the thickness of the plate-shaped base 11.
The first contact terminal 20 includes a first cambered surface contact portion 21 formed on a first side of the plate-shaped base 11, an insertion end 22 formed by extending from a rear end of the first cambered surface contact portion 21 and covering a tail portion of the insulating base 10, a first boss 23 formed at a front end of the first cambered surface contact portion 21, and a first connection portion 24 formed by extending forward from the first boss 23.
The second contact terminal 30 includes a second cambered surface contact portion 31 formed on the second side of the plate-shaped base 11, a second boss 33 formed at the front end of the second cambered surface contact portion 31, and a second connection portion 34 formed extending forward from the second boss 33.
The insertion end 22 forms a part of cone structure with gradually smaller outer diameter at the rear end of the entire test terminal a, and the rear end of the second cambered surface contact portion 31 is electrically isolated from the insertion end 22 by the isolation tail portion 12 of the insulating base 10. The first and second cambered surface contact portions 21, 31 are electrically isolated by the plate-shaped base 11. The first and second arc surface contact portions 21, 31 are combined with the plate-like base 11 into a cylindrical structure. The contact cambered surfaces of the first cambered surface contact part 21 and the second cambered surface contact part 31 are equal to the contact cambered surface of the butting torsion spring.
The outer diameters of the first and second bosses 23, 33 are larger than the outer diameters of the first and second arc surface contact portions 21, 31.
With continued reference to fig. 4, the contact impedance test terminal a of the present application is inserted into the receptacle of the receptacle terminal 40 of the receptacle B and is in electrical contact with the torsion spring 41 in the receptacle.
The contact impedance testing method comprises the following steps:
S01, providing an electric vehicle to be tested, wherein the electric vehicle to be tested is provided with a charging interface B, a socket terminal 40 is arranged in the charging interface B, and a torsion spring 41 is arranged in a jack of the socket terminal 40;
s02, inserting the contact impedance test terminal A into the torsion spring 41 of the socket terminal 40, wherein the first cambered surface contact parts 21 and the second cambered surface contact parts 31 of the contact impedance test terminal are respectively in electrical contact with the torsion spring 41;
S03, providing a micro-ohm meter, and respectively connecting two electrodes of the micro-ohm meter to the first and second connection parts 24 and 34 of the first and second contact terminals 20 and 30 of the contact impedance test terminal;
s04, starting the micro-ohm meter, enabling the first contact terminal 20, the torsion spring 41, the second contact terminal 30 and the micro-ohm meter to form a current loop, and measuring the resistance value of the loop formed by the first cambered surface contact parts 21 and the second cambered surface contact parts 31 of the first contact terminal 20 and the second contact terminal 30 and the torsion spring 41;
s05, comparing the acquired resistance value of the loop with a normal value range, judging the abrasion degree of the torsion spring, and determining whether replacement is needed.
According to the contact impedance test terminal and the test method, the first contact part 20 and the second contact part 30 are formed on the insulating substrate 10 at the same time, the first contact part 20 and the second contact part 30 are respectively contacted with the torsion spring in the electric vehicle to form a current loop, and the resistance value of the loop is measured through the micro-ohm meter, so that whether the torsion spring is in a normal abrasion state or not can be judged, and whether the torsion spring needs to be replaced or not can be judged.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.
Claims (8)
1. The contact impedance test terminal is characterized by comprising an insulating substrate, a first contact terminal and a second contact terminal, wherein the first contact terminal and the second contact terminal are formed on two sides of the insulating substrate and are electrically isolated through the insulating substrate, and the first contact terminal and the second contact terminal respectively comprise a first cambered surface contact part, a second cambered surface contact part, a first connecting part and a second connecting part;
The insulating substrate comprises a plate-shaped base, the first cambered surface contact part and the second cambered surface contact part are respectively positioned at two sides of the plate-shaped base, and the first cambered surface contact part, the second cambered surface contact part and the plate-shaped base form a cylindrical structure;
The first cambered surface contact part extends backwards to form an insertion end, the plate-shaped base tail extends in the direction perpendicular to the plate-shaped base to form an isolation tail, the insertion end is located at the rear end of the isolation tail, and the insertion end is electrically isolated from the second cambered surface contact part through the isolation tail.
2. The contact resistance test terminal according to claim 1, wherein first and second bosses are formed at front ends of the first and second arc surface contact portions, a head portion is formed at front ends of the plate-shaped base portion in an extending manner, a step portion is formed between the head portion and the plate-shaped base portion, the first and second bosses are clamped on both sides of the step portion, and the first and second bosses and the step portion form a cylindrical structure.
3. The contact impedance test terminal of claim 2 wherein said first and second connection portions extend from front ends of said first and second bosses, respectively, on opposite sides of said head portion.
4. The contact resistance test terminal according to claim 3, wherein the outer diameters of the first and second bosses are larger than the outer diameters of the first and second cambered surface contact portions, the thickness of the head portion is larger than the thickness of the plate-shaped base portion, the width of the head portion is larger than the width of the plate-shaped base portion, the width of the step portion is equal to the width of the head portion, and the thickness of the step portion is equal to the thickness of the plate-shaped base portion.
5. The contact resistance test terminal according to claim 1, wherein the insertion end constitutes a rear end of the entire test terminal and gradually becomes smaller in outer diameter in a direction away from the plate-like base.
6. The contact impedance testing terminal of claim 1, wherein said first and second connection portions are connected to an impedance testing device, said contact impedance testing terminal being inserted into a torsion spring such that said first and second contact terminals, torsion spring and said impedance testing device form a loop, said impedance testing device measuring the impedance of the loop.
7. A contact impedance testing method comprising the contact impedance testing terminal according to any one of claims 1 to 6, characterized by comprising the steps of:
S01, providing an electric vehicle to be tested, wherein the electric vehicle to be tested is provided with a charging interface, a socket terminal is arranged in the charging interface, and a torsion spring is arranged in a jack of the socket terminal;
s02, inserting the contact impedance test terminal into the torsion spring, wherein the first contact terminal and the second contact terminal of the contact impedance test terminal are respectively in electrical contact with the contact surface of the torsion spring;
s03, providing a micro-ohm meter, and connecting the micro-ohm meter to the first connecting part and the second connecting part of the first contact terminal and the second contact terminal of the contact impedance test terminal;
S04, starting the micro-ohm meter, enabling the first contact terminal, the torsion spring, the second contact terminal and the micro-ohm meter to form a current loop, and measuring impedance of the current loop;
s05, judging whether the acquired impedance of the current loop is in a preset normal value range.
8. The contact resistance testing method according to claim 7, wherein the insulating base includes a plate-shaped base, the first and second arc surface contact portions are located on both sides of the plate-shaped base, respectively, the first and second arc surface contact portions and the plate-shaped base form a cylindrical structure, and the first and second arc surface contact portions are in contact with contact surfaces of the torsion spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910646054.8A CN110261681B (en) | 2019-07-17 | 2019-07-17 | Contact impedance test terminal and contact impedance test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910646054.8A CN110261681B (en) | 2019-07-17 | 2019-07-17 | Contact impedance test terminal and contact impedance test method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110261681A CN110261681A (en) | 2019-09-20 |
| CN110261681B true CN110261681B (en) | 2024-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910646054.8A Active CN110261681B (en) | 2019-07-17 | 2019-07-17 | Contact impedance test terminal and contact impedance test method |
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| Country | Link |
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| CN (1) | CN110261681B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6280209B1 (en) * | 1999-07-16 | 2001-08-28 | Molex Incorporated | Connector with improved performance characteristics |
| JP2015159079A (en) * | 2014-02-25 | 2015-09-03 | 中国電力株式会社 | Connecting instrument and terminal connecting method |
| DE102015120229A1 (en) * | 2015-11-23 | 2017-05-24 | Phoenix Contact E-Mobility Gmbh | Test terminal for shorting two contact elements of a connector part |
| CN106785545A (en) * | 2017-03-02 | 2017-05-31 | 胡世勇 | A kind of charging electric vehicle socket of fast changeable jack |
| CN106848666A (en) * | 2017-03-18 | 2017-06-13 | 昆山惠禾新能源科技有限公司 | Plug terminal, female terminal and its component |
| CN107290610A (en) * | 2017-07-24 | 2017-10-24 | 苏州航电子科技股份有限公司 | Charging gun detector and detection method |
| CN107284246A (en) * | 2017-07-04 | 2017-10-24 | 无锡英捷汽车科技有限公司 | A kind of electric automobile main contactor failure detector |
| JP2017220346A (en) * | 2016-06-07 | 2017-12-14 | 住友電装株式会社 | connector |
| CN207398431U (en) * | 2017-11-02 | 2018-05-22 | 昆山惠禾新能源科技有限公司 | Charging gun pipette tips |
| CN211086445U (en) * | 2019-07-17 | 2020-07-24 | 昆山惠禾新能源科技有限公司 | Contact impedance test terminal |
-
2019
- 2019-07-17 CN CN201910646054.8A patent/CN110261681B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6280209B1 (en) * | 1999-07-16 | 2001-08-28 | Molex Incorporated | Connector with improved performance characteristics |
| JP2015159079A (en) * | 2014-02-25 | 2015-09-03 | 中国電力株式会社 | Connecting instrument and terminal connecting method |
| DE102015120229A1 (en) * | 2015-11-23 | 2017-05-24 | Phoenix Contact E-Mobility Gmbh | Test terminal for shorting two contact elements of a connector part |
| JP2017220346A (en) * | 2016-06-07 | 2017-12-14 | 住友電装株式会社 | connector |
| CN106785545A (en) * | 2017-03-02 | 2017-05-31 | 胡世勇 | A kind of charging electric vehicle socket of fast changeable jack |
| CN106848666A (en) * | 2017-03-18 | 2017-06-13 | 昆山惠禾新能源科技有限公司 | Plug terminal, female terminal and its component |
| CN107284246A (en) * | 2017-07-04 | 2017-10-24 | 无锡英捷汽车科技有限公司 | A kind of electric automobile main contactor failure detector |
| CN107290610A (en) * | 2017-07-24 | 2017-10-24 | 苏州航电子科技股份有限公司 | Charging gun detector and detection method |
| CN207398431U (en) * | 2017-11-02 | 2018-05-22 | 昆山惠禾新能源科技有限公司 | Charging gun pipette tips |
| CN211086445U (en) * | 2019-07-17 | 2020-07-24 | 昆山惠禾新能源科技有限公司 | Contact impedance test terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110261681A (en) | 2019-09-20 |
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