Relay detection device and charging pile comprising same
By designing a relay detection device that utilizes rectifier modules and isolation modules, the problems of large size, high cost and impaired insulation performance caused by the prior art relay detection methods are solved, and the efficient, accurate and economical effect of relay detection is achieved.
Patent Information
- Application Number
- CN202421036656.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-13
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-05-13
AI Technical Summary
Existing relay detection methods usually require the setting of auxiliary contacts or damage to insulation, resulting in large size, high cost and impaired insulation performance of the relay.
A relay detection device is designed to output the electrical signals of the live and neutral lines to the isolation module through the rectifier module, and then transmitted to the control module for detection after voltage division and adjustment, avoiding the problem of setting auxiliary contacts and destroying insulation.
It realizes the reduction of relay volume and cost, while not affecting insulation performance, and improves the accuracy and reliability of detection.
Smart Images
Figure CN222800856U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of electric control components, and in particular to a relay detection device and a charging pile comprising the same. Background Art
[0002] In existing relay products, in order to detect the status of the relay circuit, relays with auxiliary contacts are usually used, which makes the relays larger in size and higher in cost. Some other relays use a technical solution of cross-detection of the input and output ends of the live wire and the neutral wire, but this solution affects the input and output insulation resistance and is not good for the electrical performance of the equipment.
[0003] In view of the above-mentioned defects, the present invention proposes a new relay detection device and a charging pile including the same. Utility Model Content
[0004] The utility model aims to provide a relay detection device and a charging pile including the same, which can reduce the volume of the relay, reduce the cost of the relay, and do not affect the insulation performance of the relay.
[0005] The utility model solves the above technical problems through the following technical solutions:
[0006] The utility model provides a relay detection device for detecting a relay module, comprising: a rectifier module, an isolation module and a control module; the relay module is electrically connected to the control module, two ends of the rectifier module are electrically connected to the relay module and the isolation module respectively, and the isolation module is electrically connected to the control module;
[0007] The relay module comprises a live relay, a neutral relay, a live output terminal and a neutral output terminal, a first node is provided between the live relay and the live output terminal, and a second node is provided between the neutral relay and the neutral output terminal; the first node and the second node are both connected to the rectifier module;
[0008] The isolation module comprises a voltage divider circuit and a regulating circuit which are electrically connected in sequence. The regulating circuit is electrically connected to the control module and is used to output a DC voltage signal after a single-channel AC voltage is processed.
[0009] In the present technical solution, the first node between the live wire relay and the live wire output terminal and the second node between the neutral wire relay and the neutral wire output terminal output electrical signals to the isolation module through the rectifier module, which are processed by the isolation module and transmitted to the control module for calculation to detect the state of the relay module. There is no need to set auxiliary contacts, nor to destroy the insulation at the live wire output terminal and the neutral wire output terminal, thereby reducing the size of the relay and reducing product costs without affecting the insulation performance of the product.
[0010] Preferably, the rectifier module comprises a first diode and a second diode, two ends of the first diode are respectively connected to the first node and the isolation module, and two ends of the second diode are respectively connected to the second node and the isolation module.
[0011] In the technical solution, the first diode and the second diode rectify the electrical signal obtained from the relay module and prevent the neutral line and the live line of the relay from being short-circuited.
[0012] Preferably, an electromagnetic switch is provided between the live wire relay and the neutral wire relay, for keeping the live wire relay and the neutral wire relay in the same on-off state.
[0013] In this technical solution, the electromagnetic switch controls the live wire relay and the neutral wire relay to be turned on and off at the same time, so as to avoid the inconsistent states of the two affecting the operation or detection of the relay module.
[0014] Preferably, the voltage divider circuit includes a first resistor, a second resistor, a third resistor and a fourth resistor connected in series in sequence, and the fourth resistor is grounded; the voltage divider circuit also includes a transistor, the transistor is connected in parallel with the fourth resistor, the base of the transistor is electrically connected to an end of the fourth resistor close to the third resistor, and the emitter of the transistor is electrically connected to an end of the fourth resistor that is grounded; the voltage divider circuit also includes a first capacitor, and the first capacitor is connected in parallel with the fourth resistor.
[0015] In the present technical solution, the four resistors connected in series realize the functions of voltage division and current reduction, so that the voltage of the fourth resistor and the current flowing through the fourth resistor are reduced, thereby improving the detectable AC voltage range and the insulation resistance value of the live wire to the ground wire; when adhesion occurs in the relay module, the current value increases, thereby causing the transistor to turn on, and then the control module detects the abnormal state of the relay module; the first capacitor is connected in parallel with the fourth resistor to play a filtering role.
[0016] Preferably, the isolation module further comprises an optocoupler relay, a negative electrode of an output terminal of the optocoupler relay is connected to the regulating circuit, and a negative electrode of an input terminal of the optocoupler relay is electrically connected to a collector of the transistor.
[0017] In the present technical solution, when adhesion occurs in the relay module, the current value increases, thereby causing the optocoupler relay to be turned on, and then the voltage divider circuit and the regulating circuit to be connected, and the control module can detect the abnormal state of the relay module.
[0018] Preferably, the isolation module also includes a first power supply and a second power supply, the negative pole of the output end of the optocoupler relay is electrically connected to the first power supply, and a fifth resistor is provided between the optocoupler relay and the first power supply; the positive pole of the input end of the optocoupler relay and the control module are both electrically connected to the second power supply, and a sixth resistor is provided between the optocoupler relay and the second power supply.
[0019] In the present technical solution, the second power supply stabilizes the current at the input end of the optocoupler relay to avoid excessive voltage difference at the input end of the optocoupler relay; the first power supply simultaneously supplies power to the control module and the output end of the optocoupler relay, and stabilizes the current at the output end of the optocoupler relay to make the electrical signal entering the control module more continuous and smooth.
[0020] Preferably, the regulation circuit includes a seventh resistor and a second capacitor connected in series in sequence, and the second capacitor is grounded; the negative pole of the output end of the optocoupler relay is electrically connected to the seventh resistor, and the positive pole of the output end of the optocoupler relay is grounded; an output port connected to the control module is provided between the seventh resistor and the second capacitor.
[0021] In the present technical solution, the sampling signal output from the output end of the optocoupler relay is filtered through the seventh resistor and the second capacitor to obtain a DC voltage, which is output to the control module through the output port, effectively improving the reliability and accuracy of the sampling.
[0022] Preferably, the regulating circuit includes a seventh resistor, an eighth resistor, a second capacitor and a third capacitor; the seventh resistor and the second capacitor are connected in series in sequence, and the second capacitor is grounded; the eighth resistor and the third capacitor are connected in series in sequence and in parallel with the second capacitor, the third capacitor is electrically connected to the grounded end of the second capacitor, and the eighth resistor is electrically connected to the end of the second capacitor close to the seventh resistor; the negative electrode of the output end of the optocoupler relay is electrically connected to the seventh resistor, and the positive electrode of the output end of the optocoupler relay is grounded; an output port connected to the control module is provided between the seventh resistor and the second capacitor.
[0023] In the present technical solution, the sampling signal output from the output end of the optocoupler relay obtains a DC voltage through second-order filtering of the seventh resistor and the second capacitor and the eighth resistor and the third capacitor, thereby generating a smoother and more continuous output signal, which is output to the control module through the output port, effectively improving the reliability and accuracy of the sampling.
[0024] Preferably, the relay detection device further comprises a display module, which is electrically connected to the control module and is used to display a processing result of the control module.
[0025] In this technical solution, the display module displays the processing results of the control module, thereby facilitating use by operators.
[0026] The utility model also provides a charging pile, characterized by comprising a relay detection device as described in any one of the above items.
[0027] In the present technical solution, the charging pile includes the above-mentioned relay detection device, which reduces product cost and improves detection accuracy.
[0028] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.
[0029] The positive and progressive effects of the utility model are:
[0030] The utility model discloses a relay detection device and a charging pile including the same, wherein a first node between a live wire relay and a live wire output terminal and a second node between a neutral wire relay and a neutral wire output terminal output electrical signals to an isolation module via a rectifier module, which are processed by the isolation module and transmitted to a control module for operation to detect the state of the relay module. It is not necessary to set auxiliary contacts, nor to destroy the insulation at the live wire output terminal and the neutral wire output terminal, thereby reducing the size of the relay and reducing the product cost without affecting the insulation performance of the product.
[0031] To further understand the features and technical contents of the present application, please refer to the following detailed description and drawings of the present application. However, the detailed description and drawings here are only used to illustrate the present application and do not impose any limitations on the scope of the claims of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] The above and other features and advantages of the present application will become more apparent by describing in detail example embodiments thereof with reference to the attached drawings.
[0033] Figure 1 This is a schematic diagram of the principle of the relay detection device of Embodiment 1-2 of the present utility model.
[0034] Figure 2 This is a partial circuit diagram of the relay detection device of Example 1 of the utility model.
[0035] Figure 3 This is a partial circuit diagram of the relay detection device of Example 2 of the utility model.
[0036] Reference numerals
[0037] 1 Relay module
[0038] 2 Rectifier module
[0039] 3 Isolation module
[0040] 4 Control Module
[0041] 5 Display module
[0042] 101 Live relay
[0043] 102 Neutral relay
[0044] 103 LiveWire Output
[0045] 104 Neutral line output terminal
[0046] 105 FireWire input
[0047] 106 Neutral line input terminal
[0048] 107 First Node
[0049] 108 Second Node
[0050] 109 Solenoid switch
[0051] 201 First Diode
[0052] 202 Second diode
[0053] 301 First resistor
[0054] 302 Second resistor
[0055] 303 The third resistor
[0056] 304 Fourth resistor
[0057] 305 transistor
[0058] 306 First Capacitor
[0059] 307 Optocoupler Relay
[0060] 3071 Output negative terminal
[0061] 3072 Output positive terminal
[0062] 3073 Input negative terminal
[0063] 3074 Input positive terminal
[0064] 308 First Power
[0065] 309 Fifth resistor
[0066] 310 Second Power Supply
[0067] 311 Sixth resistor
[0068] 312 Seventh resistor
[0069] 313 Eighth Resistor
[0070] 314 Second capacitor
[0071] 315 The third capacitor
[0072] 316 Output Port
[0073] 317 Ninth Resistor DETAILED DESCRIPTION
[0074] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the present application. The present application can also be implemented or applied through other different specific implementation methods, and the details in the present application can also be modified or changed in various ways according to different viewpoints and application systems without departing from the spirit of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.
[0075] The following is a detailed description of the embodiments of the present application with reference to the accompanying drawings so that those skilled in the art can easily implement the present application. The present application can be embodied in a variety of different forms and is not limited to the embodiments described herein.
[0076] In the representations of the present application, the representations with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the represented specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples represented in the present application and the features of the different embodiments or examples, unless they contradict each other.
[0077] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the representation of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0078] In order to clearly describe the present application, components irrelevant to the description are omitted, and the same reference symbols are given to the same or similar components throughout the specification.
[0079] Throughout the specification, when a device is said to be "connected" to another device, this includes not only the case of "direct connection" but also the case of "indirect connection" by placing other elements therebetween. In addition, when a device is said to "include" a certain component, unless otherwise stated, it does not exclude other components, but means that other components may be included.
[0080] When a device is said to be "on" another device, it may be directly on the other device, but there may also be other devices between it. In contrast, when a device is said to be "directly" on another device, there are no other devices between it.
[0081] Although the terms first, second, etc. are used to represent various elements in some examples, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, the first interface and the second interface, etc. are represented. Moreover, as used in this article, the singular forms "one", "one" and "the" are intended to also include plural forms, unless there is an opposite indication in the context. It should be further understood that the terms "comprising" and "including" indicate the existence of features, steps, operations, elements, components, projects, kinds, and / or groups, but do not exclude the existence, occurrence or addition of one or more other features, steps, operations, elements, components, projects, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Only when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way, will there be an exception to this definition.
[0082] The technical terms used herein are only used to refer to specific embodiments and are not intended to limit the present application. The singular form used herein also includes the plural form unless the sentence clearly indicates the contrary meaning. The meaning of "including" used in the specification is to specify specific characteristics, regions, integers, steps, operations, elements and / or components, and does not exclude the existence or addition of other characteristics, regions, integers, steps, operations, elements and / or components.
[0083] Although not defined differently, all terms, including technical and scientific terms used herein, have the same meaning as those generally understood by those skilled in the art to which this application belongs. Terms defined in commonly used dictionaries are additionally interpreted as having meanings consistent with the relevant technical literature and the contents of the current disclosure, and unless defined, shall not be overly interpreted as ideal or very formal meanings.
[0084] Example 1
[0085] like Figure 1 and Figure 2 As shown, the relay detection device in this embodiment is used to detect the relay module 1, including: a rectifier module 2, an isolation module 3 and a control module 4; the relay module 1 is electrically connected to the control module 4, the two ends of the rectifier module 2 are electrically connected to the relay module 1 and the isolation module 3 respectively, and the isolation module 3 is electrically connected to the control module 4; the relay module 1 includes a live wire relay 101, a neutral wire relay 102, a live wire output terminal 103 and a neutral wire output terminal 104, a first node 107 is provided between the live wire relay 101 and the live wire output terminal 103, and a second node 108 is provided between the neutral wire relay 102 and the neutral wire output terminal 104; the first node 107 and the second node 108 are both connected to the rectifier module 2; the isolation module 3 includes a voltage divider circuit and a regulating circuit electrically connected in sequence, and the regulating circuit is electrically connected to the control module 4, and is used to output a DC voltage signal after a single-channel AC voltage is processed. The first node 107 between the live wire relay 101 and the live wire output terminal 103 and the second node 108 between the neutral wire relay 102 and the neutral wire output terminal 104 output electrical signals to the isolation module 3 through the rectifier module 2, and after being processed by the isolation module 3, the electrical signals are transmitted to the control module 4 for calculation to detect the state of the relay module 1. There is no need to set auxiliary contacts, nor to destroy the insulation at the live wire output terminal 103 and the neutral wire output terminal 104, thereby reducing the size of the relay and reducing product costs without affecting the insulation performance of the product.
[0086] The rectifier module 2 includes a first diode 201 and a second diode 202, wherein two ends of the first diode 201 are respectively connected to the first node 107 and the isolation module 3, and two ends of the second diode 202 are respectively connected to the second node 108 and the isolation module 3. The first diode 201 and the second diode 202 rectify the electrical signal obtained from the relay module 1 and prevent the neutral line and the live line of the relay from being short-circuited.
[0087] An electromagnetic switch 109 is provided between the live relay 101 and the neutral relay 102 to keep the live relay 101 and the neutral relay 102 in the same on-off state. The electromagnetic switch 109 controls the live relay 101 and the neutral relay 102 to be on and off at the same time to avoid the inconsistent state between the two affecting the operation or detection of the relay module 1.
[0088] The voltage-dividing circuit includes a first resistor 301, a second resistor 302, a third resistor 303 and a fourth resistor 304 connected in series in sequence, and the fourth resistor 304 is grounded; the voltage-dividing circuit also includes a transistor 305, the transistor 305 is connected in parallel with the fourth resistor 304, the base of the transistor 305 is electrically connected to one end of the fourth resistor 304 close to the third resistor 303, and the emitter of the transistor 305 is electrically connected to one end of the fourth resistor 304 that is grounded; the voltage-dividing circuit also includes a first capacitor 306, and the first capacitor 306 is connected in parallel with the fourth resistor 304. The four resistors connected in series realize the functions of voltage division and current reduction, so that the voltage of the fourth resistor 304 and the current flowing through the fourth resistor 304 are reduced, and the detectable AC voltage range and the insulation resistance value of the live wire to the ground wire are increased; when adhesion occurs in the relay module 1, the current value increases, so that the transistor 305 is turned on, and then the control module 4 detects the abnormal state of the relay module 1; the first capacitor 306 is connected in parallel with the fourth resistor 304 to play a filtering role.
[0089] The isolation module 3 further includes an optical coupler relay 307, wherein a negative electrode 3071 of the output terminal of the optical coupler relay 307 is connected to the regulating circuit, and a negative electrode 3073 of the input terminal of the optical coupler relay 307 is electrically connected to the collector of the transistor 305. When adhesion occurs in the relay module 1, the current value increases, thereby turning on the optical coupler relay 307, and then connecting the voltage divider circuit and the regulating circuit, and the control module 4 can detect the abnormal state of the relay module 1.
[0090] The isolation module 3 also includes a first power supply 308 and a second power supply 310. The negative electrode 3071 of the output end of the photocoupler relay 307 is electrically connected to the first power supply 308, and a fifth resistor 309 is provided between the photocoupler relay 307 and the first power supply 308; the positive electrode 3074 of the input end of the photocoupler relay 307 and the control module 4 are both electrically connected to the second power supply 310, and a sixth resistor 311 is provided between the photocoupler relay 307 and the second power supply 310. The second power supply 310 stabilizes the current at the input end of the photocoupler relay 307 to avoid excessive voltage difference at the input end of the photocoupler relay 307; the first power supply 308 simultaneously supplies power to the output ends of the control module 4 and the photocoupler relay 307, and stabilizes the current at the output end of the photocoupler relay 307, so that the electrical signal entering the control module 4 is more continuous and smooth.
[0091] The regulating circuit includes a seventh resistor 312 and a second capacitor 314 connected in series, and the second capacitor 314 is grounded; the negative electrode 3071 of the output end of the optical coupling relay 307 is electrically connected to the seventh resistor 312, and the positive electrode 3072 of the output end of the optical coupling relay 307 is grounded; an output port 316 connected to the control module 4 is provided between the seventh resistor 312 and the second capacitor 314. The sampling signal output from the output end of the optical coupling relay 307 is filtered by the seventh resistor 312 and the second capacitor 314 to obtain a DC voltage, which is output to the control module 4 through the output port 316, which effectively improves the reliability and accuracy of the sampling.
[0092] The relay detection device further comprises a display module 5, which is electrically connected to the control module 4 and is used to display the processing result of the control module 4. The display module 5 displays the processing result of the control module 4, so as to facilitate the use of the operator.
[0093] The utility model also provides a charging pile, comprising the relay detection device as described in any one of the above items. The charging pile comprises the relay detection device, which reduces product cost and improves detection accuracy.
[0094] In this embodiment, the resistance values of the first resistor 301, the second resistor 302, and the third resistor 303 are all 2MΩ, the resistance value of the fourth resistor 304 is 120kΩ, the resistance values of the fifth resistor 309 and the sixth resistor 311 are both 10kΩ, the resistance value of the seventh resistor 312 is 120kΩ, the capacitance of the first capacitor 306 is 100pF, and the capacitance of the second capacitor 314 is 2.2μF; the voltage of the first power supply 308 is 3.3V, and the voltage of the second power supply 310 is 12V; the second power supply 310 also controls the on and off of the electromagnetic switch 109.
[0095] In other embodiments, according to different application environments, the resistance of each resistor, the capacitance of each capacitor and the voltage of each power source may also be adjusted accordingly.
[0096] Example 2
[0097] like Figure 1 and Figure 3 As shown, the difference between this embodiment and embodiment 1 is that:
[0098] The regulating circuit includes a seventh resistor 312, an eighth resistor 313, a second capacitor 314 and a third capacitor 315; the seventh resistor 312 and the second capacitor 314 are connected in series in sequence, and the second capacitor 314 is grounded; the eighth resistor 313 and the third capacitor 315 are connected in series in sequence and in parallel with the second capacitor 314, the third capacitor 315 is electrically connected to the grounded end of the second capacitor 314, and the eighth resistor 313 is electrically connected to the end of the second capacitor 314 close to the seventh resistor 312; the negative electrode 3071 of the output end of the optocoupler relay 307 is electrically connected to the seventh resistor 312, and the positive electrode 3072 of the output end of the optocoupler relay 307 is grounded; an output port 316 connected to the control module 4 is provided between the seventh resistor 312 and the second capacitor 314. The sampling signal output from the output end of the optocoupler relay 307 obtains a DC voltage through second-order filtering of the seventh resistor 312 and the second capacitor 314 and the eighth resistor 313 and the third capacitor 315, thereby generating a smoother and more continuous output signal, which is output to the control module 4 through the output port 316, effectively improving the reliability and accuracy of the sampling.
[0099] A ninth resistor 317 is connected in series between the third resistor 303 and the fourth resistor 304 . The base of the transistor 305 is electrically connected to an end of the fourth resistor 304 close to the ninth resistor 317 .
[0100] In this embodiment, the resistance values of the first resistor 301, the second resistor 302, the third resistor 303, and the ninth resistor 317 are all 2MΩ, the resistance value of the fourth resistor 304 is 150kΩ, the resistance values of the fifth resistor 309 and the sixth resistor 311 are all 10kΩ, the resistance values of the seventh resistor 312 and the eighth resistor 313 are all 51kΩ, the capacitance of the first capacitor 306 is 100pF, and the capacitance of the second capacitor 314 and the third capacitor 315 are all 1μF.
[0101] In other embodiments, the resistance of each resistor and the capacitance of each capacitor may be adjusted accordingly according to different application environments.
[0102] In summary, the purpose of the utility model is to provide a relay detection device and a charging pile including the same, which can reduce the size of the relay, reduce the cost of the relay, and do not affect the insulation performance of the relay.
[0103] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.
Claims
1. A relay detection device for detecting a relay module (1), characterized in that: include: A rectifier module (2), an isolation module (3) and a control module (4); the relay module (1) is electrically connected to the control module (4), two ends of the rectifier module (2) are electrically connected to the relay module (1) and the isolation module (3) respectively, and the isolation module (3) is electrically connected to the control module (4); The relay module (1) comprises a live relay (101), a neutral relay (102), a live output terminal (103) and a neutral output terminal (104); a first node (107) is provided between the live relay (101) and the live output terminal (103); a second node (108) is provided between the neutral relay (102) and the neutral output terminal (104); the first node (107) and the second node (108) are both connected to the rectifier module (2); The isolation module (3) comprises a voltage divider circuit and a regulating circuit which are electrically connected in sequence, and the regulating circuit is electrically connected to the control module (4) and is used to output a DC voltage signal after a single-channel AC voltage is processed.
2. The detection device according to claim 1, characterized in that The rectifier module (2) comprises a first diode (201) and a second diode (202), wherein two ends of the first diode (201) are respectively connected to the first node (107) and the isolation module (3), and two ends of the second diode (202) are respectively connected to the second node (108) and the isolation module (3).
3. The detection device according to claim 1, characterized in that: An electromagnetic switch (109) is provided between the live line relay (101) and the neutral line relay (102) for maintaining the live line relay (101) and the neutral line relay (102) in the same on-off state.
4. The detection device according to claim 1, characterized in that: The voltage divider circuit comprises a first resistor (301), a second resistor (302), a third resistor (303) and a fourth resistor (304) which are connected in series in sequence, and the fourth resistor (304) is grounded; the voltage divider circuit also comprises a triode (305), the triode (305) is connected in parallel with the fourth resistor (304), the base of the triode (305) is electrically connected to an end of the fourth resistor (304) close to the third resistor (303), and the emitter of the triode (305) is electrically connected to an end of the fourth resistor (304) which is grounded; the voltage divider circuit also comprises a first capacitor (306), and the first capacitor (306) is connected in parallel with the fourth resistor (304).
5. The detection device according to claim 4, characterized in that: The isolation module (3) further comprises an optical coupler relay (307), wherein the negative electrode (3071) of the output end of the optical coupler relay (307) is connected to the regulating circuit, and the negative electrode (3073) of the input end of the optical coupler relay (307) is electrically connected to the collector of the transistor (305).
6. The detection device according to claim 5, characterized in that: The isolation module (3) further comprises a first power supply (308) and a second power supply (310); the negative electrode (3071) of the output end of the optical coupling relay (307) is electrically connected to the first power supply (308), and a fifth resistor (309) is provided between the optical coupling relay (307) and the first power supply (308); the positive electrode (3074) of the input end of the optical coupling relay (307) and the control module (4) are both electrically connected to the second power supply (310), and a sixth resistor (311) is provided between the optical coupling relay (307) and the second power supply (310).
7. The detection device according to claim 5, characterized in that: The regulating circuit comprises a seventh resistor (312) and a second capacitor (314) connected in series in sequence, and the second capacitor (314) is grounded; the negative electrode (3071) of the output end of the optical coupling relay (307) is electrically connected to the seventh resistor (312), and the positive electrode (3072) of the output end of the optical coupling relay (307) is grounded; and an output port (316) connected to the control module (4) is provided between the seventh resistor (312) and the second capacitor (314).
8. The detection device according to claim 5, characterized in that: The regulating circuit comprises a seventh resistor (312), an eighth resistor (313), a second capacitor (314) and a third capacitor (315); the seventh resistor (312) and the second capacitor (314) are connected in series in sequence, and the second capacitor (314) is grounded; the eighth resistor (313) and the third capacitor (315) are connected in series in sequence and in parallel with the second capacitor (314), the third capacitor (315) is electrically connected to a grounded end of the second capacitor (314), and the eighth resistor (313) is electrically connected to an end of the second capacitor (314) close to the seventh resistor (312); the negative electrode (3071) of the output end of the optical coupling relay (307) is electrically connected to the seventh resistor (312), and the positive electrode (3072) of the output end of the optical coupling relay (307) is grounded; an output port (316) connected to the control module (4) is provided between the seventh resistor (312) and the second capacitor (314).
9. The detection device according to claim 1, characterized in that: The relay detection device further comprises a display module (5), wherein the display module (5) is electrically connected to the control module (4) and is used to display the processing result of the control module (4).
10. A charging pile, characterized in that: It comprises the relay detection device as claimed in any one of claims 1 to 9.