CN112415372A - Relay adhesion detection circuit - Google Patents
Relay adhesion detection circuit Download PDFInfo
- Publication number
- CN112415372A CN112415372A CN202011243038.3A CN202011243038A CN112415372A CN 112415372 A CN112415372 A CN 112415372A CN 202011243038 A CN202011243038 A CN 202011243038A CN 112415372 A CN112415372 A CN 112415372A
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- relay
- electronic switch
- resistor
- output end
- detection circuit
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- 238000001514 detection method Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
Abstract
The invention belongs to the technical field of charging piles, and particularly relates to a relay adhesion detection circuit which comprises a relay K1 and a relay K2 for controlling the on-off of the output end of a charging pile, and comprises a device resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, an electronic switch S1, an electronic switch S2 and an electronic switch S3 for detecting the relay K1 and the relay K2. The method can effectively detect the adhesion condition of various states of the relay in the charging pile, reduce the cost of the device, enlarge the range of selectable models of the device, timely and reliably detect the adhesion fault of a single relay, save the cost, have high detection stability and improve the safety performance of the charging pile.
Description
Technical Field
The invention relates to the technical field of charging piles, in particular to a relay adhesion detection circuit.
Background
At present, the development of new energy industry electric automobile is widely advocated in the country, and as relying on electric energy operation's car, it becomes indispensable important supporting infrastructure equipment to fill electric pile, and wherein direct current fills electric pile and is widely used with its quick charge's characteristics. The output power supply main loop relay of the direct current charging pile controls the disconnection between the charging power supply and the electric automobile battery, and the reliable work of the relay is directly related to the safety problem in the charging process of the electric automobile. Direct current fills electric pile work and will probably cause the incident under the relay adhesion state, needs timely reliable detection to go out relay adhesion state. Most manufacturers realize adhesion detection by selecting a relay with a state feedback signal, and a controller in a pile judges whether the adhesion is caused or not by comparing the feedback signal with a control signal.
Disclosure of Invention
The invention provides a relay adhesion detection circuit which solves the problems in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a relay adhesion detection circuit comprises a relay K1 and a relay K2 which are used for controlling the on-off of the output end of a charging pile, and comprises a device resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, an electronic switch S1, an electronic switch S2 and an electronic switch S3 which are used for detecting the relay K1 and the relay K2; the input end of the electronic switch S1 is connected with the input end of the relay K1, the output end of the relay K1 is connected with the input end of the resistor R4, the output end of the electronic switch S1 is connected with the input end of the resistor R2 and the input end of the electronic switch S2, the output end of the electronic switch S2 is connected with the input end of the electronic switch S3, the output end of the electronic switch S3 is connected with the output end of the resistor R4 and the input end of the resistor R5, the output end of the resistor R2 is connected with the input end of the resistor R3, the output end of the resistor R3 is connected with the input end of the relay K2, the output end of the relay K2 is connected with the output end.
Preferably, the electronic switch S1, the electronic switch S2, the electronic switch S3, the relay K1 and the relay K2 are disconnected to form a relay detection loop when the charging of the charging pile is closed.
Preferably, the electronic switch S1, the electronic switch S2 and the electronic switch S3 close a detection circuit forming a relay K2.
Preferably, the electronic switch S1 is opened, and the electronic switch S2 and the electronic switch S3 close a detection circuit forming a relay K1.
Preferably, the electronic switch S2 and the electronic switch S3 are opened, and the electronic switch S2 and the electronic switch S3 are closed to form a relay K1 and a relay K2 sticking detection output circuit.
In the present invention,
this design can effectually detect out the adhesion condition that fills various states of electric pile internal relay, reduces the device cost, enlarges the optional model scope of device, and the cost is saved to the single relay adhesion trouble of timely reliable detection, and detection stability is high, improves the security performance that fills electric pile.
Drawings
Fig. 1 is a schematic structural diagram of a relay adhesion detection circuit according to the present invention;
fig. 2 is a schematic structural diagram of a relay adhesion detection circuit according to the present invention;
fig. 3 is a schematic structural diagram of a relay adhesion detection circuit according to the present invention;
fig. 4 is a schematic structural diagram of a relay adhesion detection circuit according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-4, a relay adhesion detection circuit comprises a relay K1 and a relay K2 for controlling the on-off of the output end of a charging pile, and comprises a device resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, an electronic switch S1, an electronic switch S2 and an electronic switch S3 for detecting the relay K1 and the relay K2; the input end of the electronic switch S1 is connected with the input end of the relay K1, the output end of the relay K1 is connected with the input end of the resistor R4, the output end of the electronic switch S1 is connected with the input end of the resistor R2 and the input end of the electronic switch S2, the output end of the electronic switch S2 is connected with the input end of the electronic switch S3, the output end of the electronic switch S3 is connected with the output end of the resistor R4 and the input end of the resistor R5, the output end of the resistor R2 is connected with the input end of the resistor R3, the output end of the resistor R3 is connected with the input end of the relay K2, the output end of the relay K2 is connected with the output end.
Furthermore, the electronic switch S1, the electronic switch S2, the electronic switch S3, the relay K1 and the relay K2 are disconnected to form a relay detection loop when the charging of the charging pile is closed.
In particular, the electronic switch S1, the electronic switch S2 and the electronic switch S3 close a detection circuit forming a relay K2.
It is worth noting that the electronic switch S1 is open, and the electronic switch S2 and the electronic switch S3 close the detection circuit forming the relay K1.
In addition, the electronic switch S2 and the electronic switch S3 are opened, and the electronic switch S2 and the electronic switch S3 are closed to form a relay K1 and a relay K2 sticking detection output loop.
The working principle is as follows:
as shown in fig. 2, in the relay detection circuit when the charging of the charging pile is closed, in the charging pile closing stage, the electronic switch S1, the electronic switch S2 and the electronic switch S3 are all in the off state, the controller controls the relay K1 and the electronic switch K2 to be off, and after the in-pile discharging circuit works, the controller collects the voltage U2 at two ends of the resistor R6, and judges whether the voltage U2 is zero; if the voltage value U2 is not equal to 0, the relay K1 and the relay K2 both have adhesion faults, the relay adhesion detection process is ended, and the controller immediately sends out an alarm signal; if the voltage value U2 is 0, the next detection step is continued.
As shown in fig. 3, the relay K2 detection circuit closes the electronic switch S1, the electronic switch S2 and the electronic switch S3, and the controller collects the voltage U2 across the resistor R6 and determines whether the voltage U2 is zero; if U2 is not equal to 0, the relay K2 has adhesion fault; if U2 is equal to 0, relay K2 is normal.
As shown in fig. 4, the relay K1 detection circuit is turned off, the electronic switch S1 is turned off, the electronic switches S2 and S3 are kept closed, the controller collects the voltage U1 across the resistor R3, and determines whether the voltage U1 is zero; if U1 is not equal to 0, the relay K1 has adhesion fault; if U1 is equal to 0, relay K1 is normal.
Finally, the electronic switch S2 and the electronic switch S3 are disconnected, the electronic switch S1, the electronic switch S2 and the electronic switch S3 are closed, and the detection results of adhesion of the relays K1 and K2 are output;
this design can effectually detect out the adhesion condition that fills various states of electric pile internal relay, reduces the device cost, enlarges the optional model scope of device, and the cost is saved to the single relay adhesion trouble of timely reliable detection, and detection stability is high, improves the security performance that fills electric pile.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. A relay adhesion detection circuit comprises a relay K1 and a relay K2 which are used for controlling the on-off of the output end of a charging pile, and is characterized by comprising a device resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, an electronic switch S1, an electronic switch S2 and an electronic switch S3 which are used for detecting the relay K1 and the relay K2; the input end of the electronic switch S1 is connected with the input end of the relay K1, the output end of the relay K1 is connected with the input end of the resistor R4, the output end of the electronic switch S1 is connected with the input end of the resistor R2 and the input end of the electronic switch S2, the output end of the electronic switch S2 is connected with the input end of the electronic switch S3, the output end of the electronic switch S3 is connected with the output end of the resistor R4 and the input end of the resistor R5, the output end of the resistor R2 is connected with the input end of the resistor R3, the output end of the resistor R3 is connected with the input end of the relay K2, the output end of the relay K2 is connected with the output end.
2. The relay adhesion detection circuit according to claim 1, wherein the electronic switch S1, the electronic switch S2, the electronic switch S3, the relay K1 and the relay K2 are disconnected to form a relay detection loop when the charging pile is charged and closed.
3. The relay sticking detection circuit as claimed in claim 1, wherein the electronic switch S1, the electronic switch S2 and the electronic switch S3 are closed to form a detection loop of the relay K2.
4. The relay sticking detection circuit as claimed in claim 1, wherein the electronic switch S1 is opened, and the electronic switch S2 and the electronic switch S3 are closed to form a detection loop of the relay K1.
5. The relay sticking detection circuit as claimed in claim 1, wherein the electronic switch S2 and the electronic switch S3 are opened, and the electronic switch S2 and the electronic switch S3 are closed to form a relay K1 and a relay K2 sticking detection output circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011243038.3A CN112415372B (en) | 2020-11-10 | Relay adhesion detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011243038.3A CN112415372B (en) | 2020-11-10 | Relay adhesion detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112415372A true CN112415372A (en) | 2021-02-26 |
| CN112415372B CN112415372B (en) | 2024-05-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114670631A (en) * | 2021-03-24 | 2022-06-28 | 北京新能源汽车股份有限公司 | Relay detection method and device and electric automobile |
| CN115184838A (en) * | 2022-09-08 | 2022-10-14 | 深圳市云天数字能源有限公司 | Relay short circuit failure detection method and device |
| CN114670631B (en) * | 2021-03-24 | 2024-05-14 | 北京新能源汽车股份有限公司 | Relay detection method and device and electric automobile |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106338688A (en) * | 2016-08-24 | 2017-01-18 | 深圳市科列技术股份有限公司 | Vehicle battery management system main relay adhesion detection circuit and detection method thereof |
| WO2018082339A1 (en) * | 2016-11-03 | 2018-05-11 | 宁德时代新能源科技股份有限公司 | Detection method and device |
| CN109143048A (en) * | 2018-07-23 | 2019-01-04 | 海马汽车有限公司 | High tension loop relay adhesion diagnostic circuit and diagnostic method |
| CN109490770A (en) * | 2018-12-20 | 2019-03-19 | 华人运通控股有限公司 | The power supply circuit and voltage sampling method and device of relay adhesion detection |
| CN111123091A (en) * | 2020-01-10 | 2020-05-08 | 江西江铃集团新能源汽车有限公司 | Electric vehicle relay adhesion detection circuit and adhesion detection method |
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338688A (en) * | 2016-08-24 | 2017-01-18 | 深圳市科列技术股份有限公司 | Vehicle battery management system main relay adhesion detection circuit and detection method thereof |
| WO2018036249A1 (en) * | 2016-08-24 | 2018-03-01 | 深圳市科列技术股份有限公司 | Main relay adhesion detection circuit of vehicle-mounted battery management system, and detection method therefor |
| WO2018082339A1 (en) * | 2016-11-03 | 2018-05-11 | 宁德时代新能源科技股份有限公司 | Detection method and device |
| CN109143048A (en) * | 2018-07-23 | 2019-01-04 | 海马汽车有限公司 | High tension loop relay adhesion diagnostic circuit and diagnostic method |
| CN109490770A (en) * | 2018-12-20 | 2019-03-19 | 华人运通控股有限公司 | The power supply circuit and voltage sampling method and device of relay adhesion detection |
| CN111123091A (en) * | 2020-01-10 | 2020-05-08 | 江西江铃集团新能源汽车有限公司 | Electric vehicle relay adhesion detection circuit and adhesion detection method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114670631A (en) * | 2021-03-24 | 2022-06-28 | 北京新能源汽车股份有限公司 | Relay detection method and device and electric automobile |
| CN114670631B (en) * | 2021-03-24 | 2024-05-14 | 北京新能源汽车股份有限公司 | Relay detection method and device and electric automobile |
| CN115184838A (en) * | 2022-09-08 | 2022-10-14 | 深圳市云天数字能源有限公司 | Relay short circuit failure detection method and device |
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