CN219496589U - Relay state detection circuit and vehicle - Google Patents
Relay state detection circuit and vehicle Download PDFInfo
- Publication number
- CN219496589U CN219496589U CN202223534288.XU CN202223534288U CN219496589U CN 219496589 U CN219496589 U CN 219496589U CN 202223534288 U CN202223534288 U CN 202223534288U CN 219496589 U CN219496589 U CN 219496589U
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- 238000001514 detection method Methods 0.000 title claims abstract description 52
- 238000005070 sampling Methods 0.000 claims abstract description 35
- 230000003287 optical effect Effects 0.000 claims abstract description 12
- 238000001914 filtration Methods 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 7
- 238000002955 isolation Methods 0.000 abstract description 4
- 238000011897 real-time detection Methods 0.000 abstract description 4
- 230000000737 periodic effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electronic Switches (AREA)
- Emergency Protection Circuit Devices (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The relay state detection circuit comprises at least one group of detection units, wherein each detection unit comprises a first sampling terminal, a second sampling terminal, a protection module, an optocoupler, a pull-up resistor and a processor, and the first sampling terminal is connected with one end of a relay to be detected; the second sampling terminal is connected with the other end of the relay to be detected; the protection module is used for protecting and filtering the power supply voltage signal; the optical coupler outputs level signal change at a pull-up node between the pull-up resistor and the optical coupler according to whether a loop connected with a relay to be detected is conducted or not; the signal input end of the processor is connected with the pull-up node, and the state of the relay to be detected is judged according to the change of the level signal. According to the relay state detection circuit, a simple circuit design is adopted, the relay state detection circuit comprises a protection module with an isolation function, the compatibility is high, detection of various input waveforms can be achieved, and then real-time detection of the relay state is achieved.
Description
Technical Field
The present disclosure relates to the field of automotive circuit design, and more particularly, to a relay status detection circuit and a vehicle.
Background
Relay contact adhesion is a common fault of new energy automobiles. Because the contact points of the relays are subjected to high voltage and high current, the contact point states are difficult to monitor in real time, the on-off of the relays are usually controlled by a control system in the prior art, and the actual on-off of each relay is not detected and checked; if the relay works with diseases, the later-stage circuit can bear the impact of load switching, and when the relay is turned off or turned on again, larger surge can be generated for the later-stage circuit, so that the service life of the later-stage circuit is seriously influenced.
Disclosure of Invention
An object of the embodiments of the present disclosure is to provide a relay state detection circuit and a vehicle to solve the above-mentioned problems.
To achieve the above object, in one aspect, embodiments of the present disclosure provide a relay state detection circuit, including at least one set of detection units, each of the detection units including a first sampling terminal, a second sampling terminal, a protection module, an optocoupler, a pull-up resistor, and a processor,
the first sampling terminal is connected with one end of the relay to be detected and is used for receiving a power supply voltage signal;
the second sampling terminal is connected with the other end of the relay to be detected;
the protection module is used for protecting and filtering the power supply voltage signal;
the optical coupler outputs level signal change at a pull-up node between the pull-up resistor and the optical coupler according to whether a loop accessed by the relay to be detected is conducted or not;
and a signal input end of the processor is connected with the pull-up node, and the state of the relay to be detected is judged according to the change of the level signal.
Preferably, the protection module includes a first diode, a second diode and a third diode, wherein an anode of the first diode is connected with the first sampling terminal, and a cathode of the first diode is connected with an anode of a light emitting diode in the optocoupler; the anode of the third diode is connected with the second sampling terminal, the cathode of the third diode is connected with the cathode of the light-emitting diode, the cathode of the second diode is connected with the cathode of the first diode, and the anode of the second diode is connected with the cathode of the third diode.
Preferably, the protection module further comprises a filter capacitor, and the filter capacitor is connected with the second diode and the light emitting diode in parallel.
Preferably, a collector of the phototriode of the optocoupler is connected with the pull-up node, and an emitter of the phototriode is grounded.
Preferably, the number of the detecting units is a plurality, and a plurality of current limiting resistors connected in series are arranged between the detecting units.
Preferably, the relay to be detected is an electromagnetic relay.
On the other hand, the embodiment of the present specification provides a vehicle including the relay state detection circuit of any one of the embodiments described above.
As can be seen from the technical solutions provided in the embodiments of the present specification, the relay state detection circuit adopts a simple circuit design, and includes a protection module with an isolation function, so that the compatibility is high, and detection of multiple input waveforms can be realized, thereby realizing real-time detection of the relay state.
Drawings
In order to more clearly illustrate the embodiments of the present description 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 below, it being obvious that the drawings in the following description are only some of the embodiments described in the present description, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. In the drawings:
fig. 1 shows a relay state detection circuit of one embodiment of the present specification.
[ reference numerals description ]
D1, a first diode;
d2, a second diode;
d3, a third diode;
c1, a filter capacitor;
u1, a light-emitting diode;
r3, pull-up resistor;
q1, a phototransistor.
Detailed Description
In order to make the technical solutions in the present specification better understood by those skilled in the art, the technical solutions in the embodiments of the present specification will be clearly and completely described below with reference to the drawings in the embodiments of the present specification, and it is obvious that the described embodiments are only some embodiments of the present specification, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are intended to be within the scope of the present disclosure.
The embodiment of the specification relates to the technical field of automobile circuit design. The vehicle may be a conventional vehicle (e.g., a fuel vehicle, etc.), or may be a new energy vehicle (e.g., a pure electric vehicle, a hybrid vehicle, a fuel cell vehicle, etc.).
The relay state detection circuit provided herein, as shown in fig. 1, comprises at least one group of detection units, each detection unit comprises a first sampling terminal, a second sampling terminal, a protection module, an optocoupler, a pull-up resistor R3 and a processor,
the first sampling terminal is connected with one end of the relay to be detected and is used for receiving a power supply voltage signal;
the second sampling terminal is connected with the other end of the relay to be detected;
the protection module is used for protecting and filtering the power supply voltage signal;
the optical coupler outputs level signal change at a pull-up node between the pull-up resistor R3 and the optical coupler according to whether a loop connected with a relay to be detected is conducted or not;
the signal input end of the processor is connected with the pull-up node, and the state of the relay to be detected is judged according to the change of the level signal.
Therefore, the relay state detection circuit adopts a simple circuit design, comprises a protection module with an isolation function, has high compatibility, can realize detection of various input waveforms, and further realizes real-time detection of the relay state.
Specifically, as shown in fig. 1, the relay state detection circuit includes two sets of detection units. The references "Relay 1_in" and "Relay 1_out" in fig. 1 may be understood as a first sampling terminal and a second sampling terminal respectively connected to two ends of a Relay to be detected in the first group of detection units. It will also be appreciated that references Relay2_in and Relay2_out in FIG. 1 are first and second sampling terminals respectively connected across the Relay to be detected in the second set of detection cells. It is further understood that the relay state detection circuit herein may detect relay states of more than two groups.
As further shown in fig. 1, specifically, the first group of detection units will be described as an example. The protection module comprises a first diode D1, a second diode D2 and a third diode D3, wherein the anode of the first diode D1 is connected with a first sampling terminal, and the cathode of the first diode D1 is connected with the anode of a light-emitting diode U1 in the optocoupler; the anode of the third diode D3 is connected with the second sampling terminal, the cathode of the third diode D3 is connected with the cathode of the light-emitting diode U1, the cathode of the second diode D2 is connected with the cathode of the first diode D1, and the anode of the second diode D2 is connected with the cathode of the third diode D3. Therefore, the protection module can play a role in preventing reverse connection of direct current power supply input.
In some embodiments, the protection module further includes a filter capacitor C1, where the filter capacitor C1 is connected in parallel with the second diode D2 and the light emitting diode U1 of the optocoupler.
With continued reference to fig. 1, the collector of the photo transistor Q1 of the optocoupler is connected to the pull-up node, and the emitter of the photo transistor Q1 is grounded.
In some embodiments, the number of the detection units is multiple, and a plurality of current limiting resistors connected in series are arranged between the detection units. In this embodiment, two current limiting resistors R1 and R2 are connected in series between the first detection unit and the second detection unit. The number of current limiting resistors is not limited herein. It will be understood, of course, that resistors R5 and R6 in the figures also serve as current limiting functions.
In some embodiments, the relay to be detected is an electromagnetic relay. The relay state detection circuit designed herein is mainly directed to electromagnetic relays.
A specific method of detecting the relay state using the relay state detection circuit herein will be described in detail.
The design is based on the fact that the two ends of the relay are continuously changed signals, and the signals can be periodic sine waves, periodic square waves, periodic triangular waves and the like, or aperiodic sine waves, square waves, triangular waves and the like. Taking a periodic signal as a square wave as an example, the judging method is as follows:
when the Relay to be detected in the first detection unit (symbol is defined as Relay 1) and the Relay to be detected in the second detection unit (symbol is defined as Relay 2) are not adhered, the photocouplers G1 and G2 are conducted, and the sampling point 1 and the sampling point 2 acquire periodic square waves;
when the Relay1 is adhered and the Relay2 is not adhered, the optical coupler G1 is not conducted, the optical coupler G2 is conducted, the sampling point 1 is at a high level, and the sampling point 2 is a periodic square wave;
when the Relay1 is not adhered and the Relay2 is adhered, the optical coupler G1 is conducted, the optical coupler G2 is not conducted, the sampling point 1 is a periodic square wave, and the sampling point 2 is a high level;
when both Relay1 and Relay2 are stuck, the photocouplers G1 and G2 are not turned on, and the sampling point 1 and the sampling point 2 are both at high level.
Therefore, when the corresponding sampling point of the processor receives a high-level signal, the relay in the corresponding detection unit is indicated to be stuck. It will of course be appreciated that in other embodiments the circuit may be designed to indicate that a relay in the corresponding detection unit sticks when a low signal is received at the corresponding sampling point of the processor.
According to the relay state detection circuit, a simple circuit design is adopted, the relay state detection circuit comprises a protection module with an isolation function, the compatibility is high, detection of various input waveforms can be achieved, and then real-time detection of the relay state is achieved.
It should also be understood that, in the embodiments of the present specification, the term "and/or" is merely one association relationship describing the association object, meaning that three relationships may exist. For example, a and/or B may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments. In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present specification. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.
Claims (7)
1. A relay state detection circuit is characterized by comprising at least one group of detection units, wherein each detection unit comprises a first sampling terminal, a second sampling terminal, a protection module, an optocoupler, a pull-up resistor and a processor,
the first sampling terminal is connected with one end of the relay to be detected and is used for receiving a power supply voltage signal;
the second sampling terminal is connected with the other end of the relay to be detected;
the protection module is used for protecting and filtering the power supply voltage signal;
the optical coupler outputs level signal change at a pull-up node between the pull-up resistor and the optical coupler according to whether a loop accessed by the relay to be detected is conducted or not;
and a signal input end of the processor is connected with the pull-up node, and the state of the relay to be detected is judged according to the change of the level signal.
2. The relay state detection circuit of claim 1, wherein the protection module comprises a first diode, a second diode, and a third diode, an anode of the first diode is connected to the first sampling terminal, and a cathode of the first diode is connected to an anode of a light emitting diode in the optocoupler; the anode of the third diode is connected with the second sampling terminal, the cathode of the third diode is connected with the cathode of the light-emitting diode, the cathode of the second diode is connected with the cathode of the first diode, and the anode of the second diode is connected with the cathode of the third diode.
3. The relay state detection circuit of claim 2, wherein the protection module further comprises a filter capacitor, the filter capacitor being connected in parallel with both the second diode and the light emitting diode.
4. The relay state detection circuit of claim 1, wherein a collector of the phototransistor of the optocoupler is coupled to the pull-up node and an emitter of the phototransistor is grounded.
5. The relay state detection circuit according to claim 1, wherein the number of the detection units is plural, and a plurality of current limiting resistors connected in series are provided between each of the detection units.
6. The relay state detection circuit of claim 1, wherein the relay to be detected is an electromagnetic relay.
7. A vehicle characterized by comprising the relay state detection circuit according to any one of claims 1 to 6.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223534288.XU CN219496589U (en) | 2022-12-29 | 2022-12-29 | Relay state detection circuit and vehicle |
| PCT/CN2023/142471 WO2024140842A1 (en) | 2022-12-29 | 2023-12-27 | Relay state detection circuit, and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223534288.XU CN219496589U (en) | 2022-12-29 | 2022-12-29 | Relay state detection circuit and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219496589U true CN219496589U (en) | 2023-08-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223534288.XU Active CN219496589U (en) | 2022-12-29 | 2022-12-29 | Relay state detection circuit and vehicle |
Country Status (2)
| Country | Link |
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| CN (1) | CN219496589U (en) |
| WO (1) | WO2024140842A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024140842A1 (en) * | 2022-12-29 | 2024-07-04 | 长春捷翼汽车科技股份有限公司 | Relay state detection circuit, and vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002064933A (en) * | 2000-08-16 | 2002-02-28 | Kenwood Corp | Protective circuit for electronic equipment |
| CN113281642B (en) * | 2017-02-23 | 2024-04-26 | 宁德时代新能源科技股份有限公司 | Relay diagnosis circuit |
| CN107607862B (en) * | 2017-09-01 | 2024-07-26 | 北京龙鼎源科技股份有限公司 | Circuit state diagnosis circuit and method |
| CN112578273A (en) * | 2019-09-30 | 2021-03-30 | 江苏万帮德和新能源科技股份有限公司 | Adhesion detection device and method for alternating current circuit relay and alternating current charging pile |
| CN112083323B (en) * | 2020-07-23 | 2021-05-04 | 浙江高泰昊能科技有限公司 | Relay adhesion detection circuit and detection method thereof |
| CN214255718U (en) * | 2021-02-19 | 2021-09-21 | 宁波奥克斯电气股份有限公司 | Reverse connection preventing circuit, system and electronic equipment |
| CN113049950B (en) * | 2021-03-05 | 2024-02-09 | 阳光电源股份有限公司 | Relay detection device and method and charging pile |
| CN113504464B (en) * | 2021-05-24 | 2023-11-24 | 浙江艾罗网络能源技术股份有限公司 | Relay adhesion detection method, circuit and system |
| CN115453405A (en) * | 2021-06-08 | 2022-12-09 | 伟巴斯特车顶供暖系统（上海）有限公司 | Fault detection device in charging equipment, charging equipment and fault detection method thereof |
| CN217820724U (en) * | 2022-06-07 | 2022-11-15 | 上海挚达科技发展有限公司 | Circuit for detecting adhesion of charging pile relay and charging pile |
| CN219496589U (en) * | 2022-12-29 | 2023-08-08 | 长春捷翼汽车科技股份有限公司 | Relay state detection circuit and vehicle |
-
2022
- 2022-12-29 CN CN202223534288.XU patent/CN219496589U/en active Active
-
2023
- 2023-12-27 WO PCT/CN2023/142471 patent/WO2024140842A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024140842A1 (en) * | 2022-12-29 | 2024-07-04 | 长春捷翼汽车科技股份有限公司 | Relay state detection circuit, and vehicle |
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| Publication number | Publication date |
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| WO2024140842A1 (en) | 2024-07-04 |
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