CN211741532U - Broken line detection circuit of PE line - Google Patents
Broken line detection circuit of PE line Download PDFInfo
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- CN211741532U CN211741532U CN201921952152.6U CN201921952152U CN211741532U CN 211741532 U CN211741532 U CN 211741532U CN 201921952152 U CN201921952152 U CN 201921952152U CN 211741532 U CN211741532 U CN 211741532U
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Abstract
The utility model relates to the technical field of charging equipment, in particular to a broken wire detection circuit of PE line, which comprises a current-limiting voltage-dividing module, a signal processing module and a control module which are connected in sequence, wherein the current-limiting voltage-dividing module is connected with a live wire, the current-limiting voltage-dividing module, the signal processing module and the control module all take the system ground as reference, and the PE line is connected with the system ground; the current limiting and voltage dividing module comprises: the device comprises a first resistor and a second resistor, wherein the first resistor is connected in series on the live wire, one end of the second resistor is connected with the first resistor, the other end of the second resistor is connected with the PE wire, and the resistance value of the second resistor is smaller than that of the first resistor. Through the mode, the charging pile can detect the connection state of the PE lines, the labor cost of field inspection of maintenance personnel is reduced, and the accuracy and timeliness of detection are improved.
Description
Technical Field
The utility model relates to a battery charging outfit technical field, concretely relates to broken string detection circuitry of PE line.
Background
With the development of national green energy, new energy electric vehicles are more and more popular, the number of charging piles is increased, the importance of safe charging is more important, and therefore the grounding protection function is more important. The PE disconnection detection is the grounding protection function plus a safety to ensure the completeness of the grounding protection function.
According to the requirement of an electric appliance grounding standard, most of charging piles are provided with grounding copper bars or grounding wires so as to ensure the safe grounding of the charging piles. Because fill electric pile and all be by staff's on-the-spot installation, there is the possibility of ground connection misloading or neglected loading, can't guarantee that every fills electric pile all is in the state of safe ground connection, and the earth connection still probably suffers because of environmental reason to corrode simultaneously and rusts, leads to the earth connection route unsmooth, can't monitor in real time that the PE line is in the state of opening circuit, fills electric pile no longer safe ground connection, leads to endangering the personnel safety of personnel that charge.
In view of the above, it is an urgent technical problem in the art to provide a new circuit for detecting a broken PE line.
Disclosure of Invention
An object of the utility model is to provide an open circuit detection circuitry of PE line to prior art's above-mentioned defect.
The purpose of the utility model can be realized by the following technical measures:
the embodiment of the utility model provides a broken string detection circuitry of PE line, this broken string detection circuitry sets up inside filling electric pile, include: the current-limiting voltage-dividing module, the signal processing module and the control module are connected in sequence, the current-limiting voltage-dividing module is connected with a live wire, the current-limiting voltage-dividing module, the signal processing module and the control module are all referenced to a system ground, and the PE wire is connected with the system ground;
the current limiting and voltage dividing module comprises: the device comprises a first resistor and a second resistor, wherein the first resistor is connected in series with the live wire, one end of the second resistor is connected with the first resistor, the other end of the second resistor is connected with the PE wire, and the resistance value of the second resistor is smaller than that of the first resistor;
the current-limiting voltage-dividing module obtains an alternating current voltage signal between the live wire and the PE wire according to a voltage-dividing signal generated by the second resistor, the signal processing module converts the alternating current voltage signal into a direct current voltage signal, and the control module compares a sampling voltage value corresponding to the direct current voltage signal with a preset voltage value to determine whether the PE wire is disconnected.
According to the utility model discloses an embodiment, the signal processing module include the rectifier cell and with the filtering unit that the rectifier cell is connected, the rectifier cell will alternating voltage signal converts to direct voltage signal, the filtering unit will direct voltage signal exports after stable.
According to an embodiment of the present invention, the rectifying unit includes a diode, and an input end of the diode is connected to the first resistor and the second resistor.
According to the utility model discloses an embodiment, the filtering unit includes third resistance, fourth resistance and electric capacity, the third resistance with the output of diode is connected, the one end of fourth resistance with the one end of electric capacity all with the PE line is connected, the other end of fourth resistance with the other end of electric capacity all with connect in the diode with between the third resistance.
According to the utility model discloses an embodiment, control module include the ADC collector and with the treater that the ADC collector is connected, the ADC collector is gathered direct current voltage signal and the corresponding sampling voltage value of output give the treater, the treater will sampling voltage value compares with preset voltage value, works as when sampling voltage value is greater than preset voltage value, judges the PE line is in normal on-state, otherwise, the PE line is in the disconnected state.
According to the utility model discloses an embodiment, the treater is connected with the server, works as when the PE line is in the broken string state, the treater to the server sends fault signal.
According to an embodiment of the present invention, the first resistor has a resistance value in a range of 6-20M.
According to an embodiment of the present invention, the resistance of the second resistor is in the range of 50-200K.
The utility model discloses a broken string detection circuitry of PE line can make to fill the PE line connection state that electric pile detected self, reduces the cost of labor of maintainer field inspection to the accuracy and the promptness that detect have been improved.
Drawings
Fig. 1 is a schematic structural diagram of a disconnection detection circuit for a PE line according to a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a circuit for detecting a disconnection of a PE line according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the following, many aspects of the present invention will be better understood with reference to the drawings. The components in the drawings are not necessarily to scale. Instead, emphasis is placed upon clearly illustrating the components of the present invention. Moreover, in the several views of the drawings, like reference numerals designate corresponding parts.
The word "exemplary" or "illustrative" as used herein means serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" or "illustrative" is not necessarily to be construed as preferred or advantageous over other embodiments. All of the embodiments described below are exemplary embodiments provided to enable persons skilled in the art to make and use the examples of the disclosure and are not intended to limit the scope of the disclosure, which is defined by the claims. In other instances, well-known features and methods have been described in detail so as not to obscure the invention. For purposes of the description herein, the terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," and derivatives thereof shall relate to the invention as oriented in fig. 1. Furthermore, there is no intention to be bound by any expressed or implied theory presented in the preceding technical field, background, brief summary or the following detailed description. It is also to be understood that the specific devices and processes illustrated in the attached drawings, and described in the following specification are simply exemplary embodiments of the inventive concepts defined in the appended claims. Hence, specific dimensions and other physical characteristics relating to the embodiments disclosed herein are not to be considered as limiting, unless the claims expressly state otherwise.
Fig. 1 shows a circuit for detecting a broken PE wire, which is disposed inside a charging pile, and referring to fig. 1, the circuit for detecting a broken PE wire includes: the power supply comprises a current limiting voltage dividing module 10, a signal processing module 20 and a control module 30 which are sequentially connected, wherein the current limiting voltage dividing module 10 is connected with a live wire 40, the current limiting voltage dividing module 10, the signal processing module 20 and the control module 30 are all based on a system ground, and a PE (polyethylene) wire 50 is connected with the system ground.
Further, referring to fig. 1 and 2, the current limiting and voltage dividing module 10 includes: the circuit comprises a first resistor R1 and a second resistor R2, wherein the first resistor R1 is connected in series on the live wire 40, one end of the second resistor R2 is connected with the first resistor R1, the other end of the second resistor R2 is connected with the PE wire 50, and the resistance value of the second resistor R2 is smaller than that of the first resistor R1. Preferably, the resistance value of the first resistor R1 is in the range of 6-20M, and the resistance value of the second resistor R2 is in the range of 50-200K; in a preferred embodiment, the first resistor R1 has a resistance of 12M, and the second resistor R2 has a resistance of 100K. The first resistor R1 and the second resistor R2 divide the input voltage of the live wire 40, the divided voltage of the first resistor R1 is to maintain the insulation between the live wire 40 and the PE wire 50 to satisfy the requirement of voltage resistance, and the divided voltage of the second resistor R2 is to detect the voltage between the live wire 40 and the PE wire 50.
The current-limiting voltage-dividing module 10 obtains an ac voltage signal between the live wire 40 and the PE wire 50 according to a voltage-dividing signal generated by the second resistor R2, the signal processing module 20 converts the ac voltage signal into a dc voltage signal, and the control module 30 compares a sampling voltage value corresponding to the dc voltage signal with a preset voltage value to determine whether the PE wire 50 is disconnected. When the sampling voltage value is greater than the preset voltage value, the PE line 50 is determined to be in a normal on state, otherwise, the PE line 50 is determined to be in an off state. The predetermined voltage value is a voltage value between the live wire 40 and the PE line 50 when the PE line 50 is in the disconnected state.
In this embodiment, when the PE line 50 is in the normal on state, the voltage of the PE line 50 is equal to the voltage of the system ground, and when the PE line 50 is in the off state, the system ground floats up and the reference voltage to the PE line 50 becomes high, the voltage between the system ground and the fire line 40 becomes small, and the divided voltage of the second resistor R2 also becomes small.
Further, referring to fig. 1 and 2, the signal processing module 20 includes a rectifying unit 201 and a filtering unit 202 connected to the rectifying unit 201, wherein the rectifying unit 201 converts an ac voltage signal (i.e., a voltage-divided signal of the second resistor R2) into a dc voltage signal, and the filtering unit 202 stabilizes the dc voltage signal and outputs the stabilized dc voltage signal.
Further, referring to fig. 2, the rectifying unit 201 includes a diode D1, and an input terminal of the diode D1 is commonly connected to the first resistor R1 and the second resistor R2.
Further, referring to fig. 2, the filtering unit 202 includes a third resistor R3, a fourth resistor R4, and a capacitor C1, the third resistor R3 is connected to the output end of the diode D1, one end of the fourth resistor R4 and one end of the capacitor C1 are both connected to the PE line 50, and the other end of the fourth resistor R4 and the other end of the capacitor C1 are both connected between the diode D1 and the third resistor R3.
Further, referring to fig. 1 and 2, the control module 30 includes an ADC collector 301 and a processor 302 connected to the ADC collector 301, the ADC collector 301 collects a dc voltage signal and outputs a corresponding sampling voltage value to the processor 302, the processor 302 compares the sampling voltage value with a preset voltage value, and when the sampling voltage value is greater than the preset voltage value, it is determined that the PE line 50 is in a normal on state, otherwise, the PE line 50 is in an off state.
Further, the processor 302 is connected to a server (not shown), and when the PE line 50 is in a disconnection state, the processor 302 sends a fault signal to the server to notify the staff to troubleshoot and handle the grounding problem in time.
The disconnection detection circuit of the PE line 50 of the embodiment can enable the charging pile to detect the connection state of the PE line 50 of the charging pile, reduces the labor cost of field inspection of maintenance personnel, and improves the accuracy and timeliness of detection. When charging pile self-checking fault state, the server can be uploaded in time, workers are informed to check and process grounding problems in time, and charging safety of the charging pile is improved.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The utility model provides a broken string detection circuitry of PE line, sets up inside filling electric pile, its characterized in that, this broken string detection circuitry includes: the current-limiting voltage-dividing module, the signal processing module and the control module are connected in sequence, the current-limiting voltage-dividing module is connected with a live wire, the current-limiting voltage-dividing module, the signal processing module and the control module are all referenced to a system ground, and the PE wire is connected with the system ground;
the current limiting and voltage dividing module comprises: the device comprises a first resistor and a second resistor, wherein the first resistor is connected in series with the live wire, one end of the second resistor is connected with the first resistor, the other end of the second resistor is connected with the PE wire, and the resistance value of the second resistor is smaller than that of the first resistor;
the current-limiting voltage-dividing module obtains an alternating current voltage signal between the live wire and the PE wire according to a voltage-dividing signal generated by the second resistor, the signal processing module converts the alternating current voltage signal into a direct current voltage signal, and the control module compares a sampling voltage value corresponding to the direct current voltage signal with a preset voltage value to determine whether the PE wire is disconnected.
2. The disconnection detecting circuit of claim 1, wherein the signal processing module comprises a rectifying unit and a filtering unit connected to the rectifying unit, the rectifying unit converts the ac voltage signal into the dc voltage signal, and the filtering unit stabilizes the dc voltage signal and outputs the stabilized dc voltage signal.
3. The disconnection detecting circuit according to claim 2, wherein the rectifying unit includes a diode, and an input terminal of the diode is connected in common to the first resistor and the second resistor.
4. The disconnection detecting circuit according to claim 3, wherein the filtering unit includes a third resistor, a fourth resistor, and a capacitor, the third resistor is connected to the output terminal of the diode, one end of the fourth resistor and one end of the capacitor are both connected to the PE line, and the other end of the fourth resistor and the other end of the capacitor are both connected between the diode and the third resistor.
5. The disconnection detection circuit of claim 1, wherein the control module comprises an ADC collector and a processor connected to the ADC collector, the ADC collector collects the dc voltage signal and outputs a corresponding sampling voltage value to the processor, the processor compares the sampling voltage value with a preset voltage value, and when the sampling voltage value is greater than the preset voltage value, it is determined that the PE line is in a normal on state, otherwise, the PE line is in a disconnected state.
6. The outage detection circuit of claim 5, wherein the processor is coupled to a server, and wherein the processor sends a fault signal to the server when the PE line is in an outage state.
7. The disconnection detection circuit of claim 1, wherein the first resistor has a resistance value in the range of 6-20M.
8. The disconnection detection circuit of claim 7, wherein the second resistor has a resistance value in the range of 50-200K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921952152.6U CN211741532U (en) | 2019-11-12 | 2019-11-12 | Broken line detection circuit of PE line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921952152.6U CN211741532U (en) | 2019-11-12 | 2019-11-12 | Broken line detection circuit of PE line |
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| CN211741532U true CN211741532U (en) | 2020-10-23 |
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| CN201921952152.6U Active CN211741532U (en) | 2019-11-12 | 2019-11-12 | Broken line detection circuit of PE line |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112394302A (en) * | 2020-11-26 | 2021-02-23 | 江苏为恒智能科技有限公司 | Storage battery pack sampling line breakage detection device and method |
| CN114002505A (en) * | 2021-10-29 | 2022-02-01 | 广东浦尔顿科技有限公司 | Charging pile grounding detection method and system |
-
2019
- 2019-11-12 CN CN201921952152.6U patent/CN211741532U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112394302A (en) * | 2020-11-26 | 2021-02-23 | 江苏为恒智能科技有限公司 | Storage battery pack sampling line breakage detection device and method |
| CN114002505A (en) * | 2021-10-29 | 2022-02-01 | 广东浦尔顿科技有限公司 | Charging pile grounding detection method and system |
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