CN221174886U - Relay adhesion detection device - Google Patents
Relay adhesion detection device Download PDFInfo
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- CN221174886U CN221174886U CN202322937808.XU CN202322937808U CN221174886U CN 221174886 U CN221174886 U CN 221174886U CN 202322937808 U CN202322937808 U CN 202322937808U CN 221174886 U CN221174886 U CN 221174886U
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- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 238000005070 sampling Methods 0.000 claims abstract description 25
- 239000003990 capacitor Substances 0.000 claims description 12
- 230000015556 catabolic process Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The embodiment of the utility model provides a relay adhesion detection device, which comprises: the device comprises a first rectifying module, a second rectifying module, a current limiting module, a sampling module and a microprocessor; the voltage signal is obtained by adding the resistor and the voltage-stabilizing diode, so that whether adhesion faults occur or not is confirmed, and the detection device is simple in design and improves reliability.
Description
Technical Field
The utility model relates to the technical field of circuit detection, in particular to a relay adhesion detection device.
Background
At present, in the charging process of a new energy automobile, the aging of a relay contact is inevitably caused by long-time heavy current charging or heavy current impact, the contact is adhered under certain conditions, and the charging cannot be performed or the charging is unsafe after the relay is adhered. The detection circuit in the prior art adopts different circuits to detect on the L line and the N line respectively, and the detection circuit is repeated and complex.
Disclosure of utility model
The embodiment of the utility model provides a relay adhesion detection device, which is used for detecting an L line and an N line in parallel, acquiring a voltage signal by adding a resistor and a voltage-stabilizing diode, and further confirming whether adhesion failure occurs.
In a first aspect, an embodiment of the present utility model provides a relay adhesion detection apparatus, including: the device comprises a first rectifying module, a second rectifying module, a current limiting module, a sampling module and a microprocessor; wherein,
The first port of the first rectifying module is connected with the output end of the first relay, the first port of the second rectifying module is connected with the output end of the second relay, the second port of the first rectifying module is connected with the second port of the second rectifying module and the first port of the current limiting module, the second port of the current limiting module is connected with the first port of the sampling module, and the second port of the sampling module is connected with the microprocessor;
The first rectifying module is used for converting alternating current at the output end of the first relay into direct current;
the second rectifying module is used for converting alternating current at the output end of the second relay into direct current;
and the sampling module is used for collecting the current output by the second port of the current limiting module and sending the voltage signal generated after the current flows through the sampling module to the microprocessor.
Specifically, the first rectifying module comprises a first diode, and the second rectifying module comprises a second diode; wherein,
The positive electrode of the first diode is connected with the output end of the first relay, the negative electrode of the first diode is connected with the first port of the current limiting module, and the first relay is connected with the L line; the positive pole of second diode is connected with second relay output, and the negative pole of second diode is connected with current limiting module's first port, and the second relay is connected in the N line.
Specifically, the sampling module includes a third diode and a capacitor;
The cathode of the third diode is connected with the second port of the current-limiting resistor and the first port of the capacitor, and the anode of the third diode is grounded with the second port of the capacitor; the first port of the capacitor is connected with the microprocessor.
In addition, the third diode is a zener diode.
Furthermore, the voltage signal comprises at least one of: the first port of the third diode inputs a first current from the current limiting module, and the first voltage signal is generated at two ends of the third diode; the third diode inputs a second current from the current limiting module, and generates a second voltage signal at two ends of the third diode, wherein the first voltage signal and the second voltage signal are smaller than the breakdown voltage of the third diode.
Specifically, the microprocessor is used for receiving the voltage signal sent by the sampling module and judging a circuit with the relay adhesion according to the voltage signal; when the relay of the N line is adhered, the voltage signal is in a first voltage interval, and the first voltage interval is a low voltage interval; when the relay of the L line is adhered, the voltage signal is in a second voltage interval, and any voltage in the first voltage interval is smaller than any voltage in the second voltage interval.
Specifically, the current limiting module comprises at least one current limiting resistor;
The first port of the current limiting resistor is connected with the second port of the first diode and the second port of the second diode, and the second port of the current limiting module is connected with the first port of the sampling module.
In addition, the resistance of the current limiting resistor ranges from 100K to 1000MΩ.
Further, the average rectified current of the first diode and the second diode was 1A, and the reverse voltage of the first diode and the second diode was 2000V.
Specifically, the detection device further comprises a warning module, and the warning module is connected with the microprocessor; the warning module is used for receiving and responding to the warning signal sent by the microprocessor.
According to the utility model, the L line and the N line are detected in parallel, and the voltage signal is obtained by adding the resistor and the voltage stabilizing diode, so that whether adhesion failure occurs or not is confirmed.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a relay adhesion detection device according to an embodiment of the present utility model;
fig. 2 is a topology diagram of a relay adhesion detection apparatus according to an embodiment of the present utility model.
Detailed Description
In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
It should be understood that the term "and/or" is merely an association relationship describing the associated object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In this context, the character "/" indicates that the front and rear associated objects are an "or" relationship.
The term "plurality" as used in the embodiments of the present utility model means two or more. The "connection" in the embodiment of the present utility model refers to various connection manners such as direct connection or indirect connection, so as to implement communication between devices, which is not limited in the embodiment of the present utility model.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a relay adhesion detection device according to an embodiment of the present utility model, as shown in fig. 1, the relay adhesion detection device includes a first rectifying module 10, a second rectifying module 20, a current limiting module 30, a sampling module 40, a microprocessor, and a warning module.
The first port of the first rectifying module 10 is connected with the output end of the first relay, the first port of the second rectifying module 20 is connected with the output end of the second relay, the second port of the first rectifying module 10 is connected with the second port of the second rectifying module 20 and the first port of the current limiting module 30, the second port of the current limiting module 30 is connected with the first port of the sampling module 40, and the second port of the sampling module 40 is connected with the microprocessor;
the first rectifying module 10 is used for converting alternating current at the output end of the first relay into direct current;
The second rectifying module 20 is configured to convert an ac current at an output end of the second relay into a dc current;
Specifically, the current limiting module 30 is configured to limit the current flowing through the current limiting module 30, and control the current to be at a lower level, for example, control the current to be less than 1mA.
The sampling module 40 is configured to collect the current output from the second port of the current limiting module 30, and send the voltage signal generated after the current flows through the sampling module to the microprocessor.
Specifically, after receiving the voltage signal, the microprocessor confirms that the adhesion fault occurrence position is L line or N line according to the voltage signal, controls the warning module, and sends a warning signal to the outside to prompt a user that the adhesion fault exists in the relay of the charging pile, and timely takes measures to ensure safety.
Specifically, referring to fig. 2, fig. 2 is a topology diagram of a relay adhesion detection apparatus according to an embodiment of the present utility model, as shown in fig. 2, a first rectifying module 10 includes a first diode D1, and a second rectifying module 20 includes a second diode D2;
the positive electrode of the first diode is connected with the output end of the first relay, the negative electrode of the first diode is connected with the first port of the current limiting module, and the first relay is connected with the L line; the positive pole of second diode is connected with second relay output, and the negative pole of second diode is connected with current limiting module's first port, and the second relay is connected in the N line.
Specifically, the first diode D1 and the second diode D2 having an average rectified current of 1A and a reverse voltage of 2000V may be selected.
Specifically, the sampling module 40 includes a third diode D3 and a capacitor C;
The cathode of the third diode D3 is connected with the second port of the current-limiting resistor R and the first port of the capacitor C, and the anode of the third diode is grounded with the second port of the capacitor C;
Wherein the first port of the capacitor C is connected to the microprocessor.
Specifically, the third diode D3 is a zener diode, preferably a zener diode with low leakage, so as to ensure that when the voltage of the N line to the ground is small and the value of R is large, the third diode D3 can accurately obtain a voltage signal, and avoid the occurrence of the situations of missing report faults and the like.
Specifically, the third diode D3 may be another diode with smaller reverse current and low leakage, such as a TVS (TRANSIENT VOLTAGE SUPPRESSORS, transient voltage suppressor), that is, an avalanche breakdown diode, where it is understood that the selection criteria of the third diode D3 in the present application is that the reverse current is smaller, and even if the value of R is large, the microprocessor can obtain the blocking voltage signal when the voltage signal between the N line and the PE ground is small.
Specifically, the voltage signal includes at least one of: the first port of the third diode inputs a first current from the current limiting module, and the first voltage signal is generated at two ends of the third diode; the third diode inputs a second current from the current limiting module, and generates a second voltage signal at two ends of the third diode, wherein the first voltage signal and the second voltage signal are smaller than the breakdown voltage of the third diode.
For example, when the relay on the front L line or the N line has adhesion fault, there is a current flowing through the current limiting module and then flowing through the third diode, and the first current I1 is greater than the second current I2; it should be appreciated that when the relays on the L-line and the N-line do not have a stuck fault, the first current I1 and/or the second current I2 does not exist.
Specifically, the current limiting module comprises at least one current limiting resistor;
The first port of the current limiting resistor R is connected with the second port of the first diode and the second port of the second diode, and the second port of the current limiting resistor R is connected with the first port of the sampling module.
Specifically, a current limiting resistor R having a resistance value in the range of 100K to 1000MΩ is preferable.
In other possible examples, the current limiting module may include a plurality of current limiting resistors R1-Rn, where the current limiting resistors R1-Rn are connected in series in the current limiting module, and the total resistance ranges from 100K to 1000mΩ, where n > 2.
Specifically, the microprocessor is used for receiving the voltage signal sent by the sampling module and judging a circuit with relay adhesion according to the magnitude of the voltage signal; when the relay of the N line is adhered, the voltage signal is in a first voltage interval, and the first voltage interval is a low voltage interval; when the relay of the L line is adhered, the voltage signal is in a second voltage interval, and any voltage in the first voltage interval is smaller than any voltage in the second voltage interval.
Specifically, when the relay of the N line is adhered, the neutral point can deviate because the three-phase leading-out load of the mains supply transformer cannot be balanced absolutely, and a voltage is arranged between the N line and the PE ground line and is about 1-8V AC; when the relay of the L line is stuck, the voltage is higher than the voltage of the PE ground line and is about 100-240V AC, so that the voltage generated by the third diode is larger than the voltage generated by the third diode when the relay of the N line is stuck; if the voltage signal is 0, the relays of the L line and the relays of the N line are not adhered.
Wherein the detection device further comprises a warning module; the warning module is connected with the microprocessor and is used for receiving a warning signal sent by the microprocessor, and the warning signal is a control signal generated after the microprocessor receives the first voltage signal or the second voltage signal.
Specifically, the warning module can be connected with external equipment such as sound equipment and pilot lamp for reflecting warning signal, and warning module syntropy stereo set or pilot lamp send warning signal to control sound equipment sends warning suggestion sound, or control pilot lamp flash red light etc. similar signal, in order to realize the suggestion user and present the relay adhesion condition that exists.
Further, the warning signal of the microprocessor may include a first warning signal generated by the first voltage signal and a second warning signal generated by the second voltage signal, and the warning module controls the subsequent external device to execute different prompting signals according to the type of the warning signal, for example, after the warning module receives the first warning signal, the warning module controls the indicator light to flash a red light to prompt that the external L line has relay adhesion condition, or after the warning module receives the second warning signal, the warning module controls the indicator light to flash a yellow light to prompt that the external N line has relay adhesion condition, so that the prompting effect is more visual, and the external user can clearly know the internal circuit fault reason.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
In the several embodiments provided by the present utility model, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, such as a division of units, merely a division of logic functions, and there may be additional divisions in actual implementation, such as multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, or may be in electrical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present utility model may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The foregoing has outlined rather broadly the more detailed description of embodiments of the utility model, wherein the principles and embodiments of the utility model are explained in detail using specific examples, the above examples being provided solely to facilitate the understanding of the method and core concepts of the utility model; meanwhile, as those skilled in the art will appreciate, modifications will be made in the specific embodiments and application scope in accordance with the idea of the present utility model, and the present disclosure should not be construed as limiting the present utility model.
Claims (10)
1. A relay adhesion detection apparatus, characterized in that the detection apparatus comprises: the device comprises a first rectifying module, a second rectifying module, a current limiting module, a sampling module and a microprocessor; wherein,
The first port of the first rectifying module is connected with the output end of the first relay, the first port of the second rectifying module is connected with the output end of the second relay, the second port of the first rectifying module is connected with the second port of the second rectifying module and the first port of the current limiting module, the second port of the current limiting module is connected with the first port of the sampling module, and the second port of the sampling module is connected with the microprocessor;
The first rectifying module is used for converting alternating current at the output end of the first relay into direct current;
The second rectifying module is used for converting alternating current at the output end of the second relay into direct current;
the sampling module is used for collecting the current output by the second port of the current limiting module, and sending the voltage signal generated after the current flows through the sampling module to the microprocessor.
2. The relay adhesion detection apparatus of claim 1 wherein the first rectification module comprises a first diode and the second rectification module comprises a second diode; wherein,
The positive electrode of the first diode is connected with the output end of the first relay, the negative electrode of the first diode is connected with the first port of the current limiting module, and the first relay is connected with an L line;
the positive pole of second diode with the second relay output is connected, the negative pole of second diode with current limiting module's first port is connected, the second relay is connected in the N line.
3. The relay adhesion detection apparatus of claim 2 wherein the sampling module comprises a third diode and a capacitor;
The cathode of the third diode is connected with the second port of the current limiting module and the first port of the capacitor, and the anode of the third diode is grounded with the second port of the capacitor;
the first port of the capacitor is connected with the microprocessor.
4. The relay adhesion detection apparatus of claim 3 wherein the third diode is a zener diode.
5. The relay adhesion detection apparatus of claim 4, wherein the voltage signal comprises at least one of: a first voltage signal and a second voltage signal,
A first port of the third diode inputs a first current from the current limiting module, and the first voltage signal is generated at two ends of the third diode;
And a first port of the third diode inputs a second current from the current limiting module, and the second voltage signal is generated at two ends of the third diode, wherein the first voltage signal and the second voltage signal are smaller than the breakdown voltage of the third diode.
6. The relay adhesion detection apparatus according to claim 5, wherein the microprocessor is configured to receive the voltage signal sent by the sampling module, and determine a line on which relay adhesion occurs according to the magnitude of the voltage signal;
When the relay of the N line is adhered, the voltage signal is in a first voltage interval, and the first voltage interval is a low voltage interval; when the relay of the L line is adhered, the voltage signal is in a second voltage interval, and any voltage in the first voltage interval is smaller than any voltage in the second voltage interval.
7. The relay adhesion detection apparatus of claim 2 wherein the current limiting module comprises at least one current limiting resistor;
The first port of the current limiting resistor is connected with the second port of the first diode and the second port of the second diode, and the second port of the current limiting module is connected with the first port of the sampling module.
8. The relay adhesion detection apparatus according to claim 7, wherein the current limiting resistor has a resistance value in a range of 100K to 1000mΩ.
9. The relay adhesion detection apparatus according to claim 8, wherein an average rectification current of the first diode and the second diode is 1A, and a reverse voltage of the first diode and the second diode is 2000V.
10. The relay adhesion detection apparatus of any one of claims 1-9, wherein the detection apparatus further comprises a warning module, the warning module being coupled to the microprocessor;
The warning module is used for receiving and responding to the warning signal sent by the microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322937808.XU CN221174886U (en) | 2023-10-30 | 2023-10-30 | Relay adhesion detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322937808.XU CN221174886U (en) | 2023-10-30 | 2023-10-30 | Relay adhesion detection device |
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| CN221174886U true CN221174886U (en) | 2024-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322937808.XU Active CN221174886U (en) | 2023-10-30 | 2023-10-30 | Relay adhesion detection device |
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| CN (1) | CN221174886U (en) |
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