CN213633722U - Detection device - Google Patents
Detection device Download PDFInfo
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- CN213633722U CN213633722U CN202021885486.9U CN202021885486U CN213633722U CN 213633722 U CN213633722 U CN 213633722U CN 202021885486 U CN202021885486 U CN 202021885486U CN 213633722 U CN213633722 U CN 213633722U
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Abstract
The application provides a detection device, this detection device is used for detecting the adhesion of the relay that awaits measuring, and the relay that awaits measuring includes first end and second end, and first end is connected with power battery's anodal electricity, and the second end is connected with power battery's negative pole electricity, and the device includes: the first voltage acquisition circuit is electrically connected with the first end and used for acquiring a first voltage signal; the second voltage acquisition circuit is electrically connected with the second end and used for acquiring a second voltage signal, and the second voltage acquisition circuit is the same as the first voltage acquisition circuit; and the alarm is respectively and electrically connected with the first voltage acquisition circuit and the second voltage acquisition circuit and is used for sending alarm information according to the first voltage signal and the second voltage signal. After the relay to be detected is disconnected, the detection device collects the first voltage signal and the second voltage signal to be compared, whether the relay to be detected is adhered or not is determined, and therefore warning information is sent out, the relay to be detected is easy to malfunction compared with an auxiliary contact, and the stability of detection is improved.
Description
Technical Field
The application relates to the technical field of relay detection, in particular to a detection device.
Background
High-power relays or contactors are commonly adopted in high-voltage switches of new energy vehicles, and electric arcs or adhesion conditions may occur in the process of closing or opening the switches of the relays. If the situation occurs, the service life of the relay is shortened or the relay cannot be disconnected, and unsafe factors are caused to the system, so that the relay adhesion detection is well done, and the problem is found in time, which is very important. At present, a relay with an auxiliary contact and a relay without the auxiliary contact are provided, whether the relay is adhered or not can be detected by the aid of the auxiliary contact, and the relay is low in stability and high in price.
The above information disclosed in this background section is only for enhancement of understanding of the background of the technology described herein and, therefore, certain information may be included in the background that does not form the prior art that is already known in this country to a person of ordinary skill in the art.
SUMMERY OF THE UTILITY MODEL
The application mainly aims to provide a detection device to solve the problem that relay adhesion in the prior art is unstable in detection.
According to the utility model discloses an aspect of the embodiment provides a detection device for detect the adhesion of the relay that awaits measuring, the relay that awaits measuring includes first end and second end, first end and power battery's anodal electric connection, the second end with power battery's negative pole electricity is connected, the device includes: the first voltage acquisition circuit is electrically connected with the first end and used for acquiring a first voltage signal; the second voltage acquisition circuit is electrically connected with the second end and used for acquiring a second voltage signal, and the second voltage acquisition circuit is the same as the first voltage acquisition circuit; and the alarm is respectively and electrically connected with the first voltage acquisition circuit and the second voltage acquisition circuit and is used for sending alarm information according to the first voltage signal and the second voltage signal.
Optionally, the first voltage acquisition circuit includes: the first voltage division circuit comprises a plurality of first voltage division resistors which are sequentially connected in series, one end of the first voltage division circuit is electrically connected with the first end, and the other end of the first voltage division circuit is connected with the negative electrode of the power battery; the first voltage acquisition end is electrically connected with a first connecting circuit and used for outputting the first voltage signal, and the first connecting circuit is a connecting circuit between any two adjacent first voltage dividing resistors.
Optionally, the second voltage acquisition circuit includes: the second voltage division circuit comprises a plurality of second voltage division resistors which are sequentially connected in series, one end of the second voltage division circuit is electrically connected with the second end, and the other end of the second voltage division circuit is connected with the negative electrode of the power battery; and the second voltage acquisition end is electrically connected with the second connecting circuit and is used for outputting the second voltage signal, and the second connecting circuit is a connecting circuit between any two adjacent second voltage division resistors.
Optionally, the apparatus further comprises: the power-on circuit comprises a first switch, one end of the first switch is electrically connected with the first end, and the other end of the first switch is electrically connected with the positive electrode of the storage battery; and the reference circuit comprises a second switch, one end of the second switch is connected with the negative electrode of the power battery, and one end of the second switch is connected with the negative electrode of the storage battery.
Optionally, the alarm comprises: the analog-digital converter is connected with the first voltage acquisition end and the second voltage acquisition end and is used for converting the first voltage signal and the first voltage signal into a first voltage value and a second voltage value respectively; and the processor is electrically connected with the analog-digital converter and used for sending out alarm information according to the first voltage value and the second voltage value.
Optionally, the first switch is a first relay, the power-on circuit further includes a first triode, one end of a coil of the first relay is electrically connected to a positive electrode of the battery, the other end of the coil of the first relay is electrically connected to an emitter of the first triode, the second switch is a second relay, the reference circuit further includes a second triode, one end of a coil of the second relay is electrically connected to the positive electrode of the battery, the other end of the coil of the second relay is electrically connected to an emitter of the second triode, a collector of the first triode and a collector of the second triode are both electrically connected to a negative electrode of the battery, and the device further includes: and the controller is electrically connected with the base electrode of the first triode and the base electrode of the second triode and is used for sending an enabling signal.
Optionally, the first voltage acquisition circuit further includes: the first clamping circuit comprises a first clamping diode, a second clamping diode and a first voltage limiting end, wherein the anode of the first clamping diode is electrically connected with the cathode of the power battery, the cathode of the first clamping diode is electrically connected with the anode of the second clamping diode and the first voltage collecting end, the cathode of the second clamping diode is electrically connected with the first voltage limiting end, and the first voltage limiting end is used for providing first clamping voltage.
Optionally, the second voltage acquisition circuit further includes: the second clamping circuit comprises a third clamping diode, a fourth clamping diode and a second voltage limiting end, wherein the anode of the third clamping diode is electrically connected with the cathode of the power battery, the cathode of the third clamping diode is electrically connected with the anode of the fourth clamping diode and the second voltage collecting end, the cathode of the fourth clamping diode is electrically connected with the second voltage limiting end, and the second voltage limiting end is used for providing second clamping voltage.
Optionally, the first voltage acquisition circuit further includes: the first capacitor comprises a third end and a fourth end, the third end is electrically connected with the first voltage acquisition end, and the fourth end is electrically connected with the negative electrode of the power battery; and the first current limiting resistor is positioned on a connecting circuit of the first voltage acquisition end and the first connecting circuit.
Optionally, the second voltage acquisition circuit further includes: the second capacitor comprises a fifth end and a sixth end, the fifth end is electrically connected with the second voltage acquisition end, and the sixth end is electrically connected with the negative electrode of the power battery; and the second current-limiting resistor is positioned on a connecting line of the second voltage acquisition end and the second connecting line.
In the embodiment of the utility model, among the above-mentioned detection device, after the relay disconnection that awaits measuring, first voltage acquisition circuit is connected with the first end electricity of the relay that awaits measuring, with gather first voltage signal, second voltage acquisition circuit is connected with the second end electricity of the relay that awaits measuring, with gather second voltage signal, and second voltage acquisition circuit is the same with first voltage acquisition circuit, the alarm can be through comparing first voltage signal and second voltage signal, confirm whether the relay that awaits measuring adheres, thereby send alarm information, compare in the easy failure of auxiliary contact, the stability of detection has been improved, the problem of prior art relay adhesion detection instability has been solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
FIG. 1 shows a schematic diagram of a relay under test according to an embodiment of the present application;
FIG. 2 shows a schematic diagram of a first voltage acquisition circuit according to an embodiment of the present application;
FIG. 3 shows a schematic diagram of a second voltage acquisition circuit according to an embodiment of the present application; and
FIG. 4 shows a schematic diagram of a power-up circuit and a reference circuit according to an embodiment of the present application.
Wherein the figures include the following reference numerals:
01. a relay to be tested; 02. a first end; 03. a second end; 10. a first voltage acquisition circuit; 11. a first voltage acquisition terminal; 12. a first voltage dividing resistor; 13. a first clamp circuit; 131. a first clamping diode; 132. a second clamping diode; 133. a first voltage limiting end; 14. a first capacitor; 15. a first current limiting resistor; 20. a second voltage acquisition circuit; 21. a second voltage acquisition terminal; 22. a second voltage dividing resistor; 23. a second clamp circuit; 231. a third clamping diode; 232. a fourth clamping diode; 233. a second voltage limiting end; 24. a second capacitor; 25. a second current limiting resistor; 30. a power-up circuit; 31. a first switch; 32. a first triode; 40. a reference circuit; 41. a second switch; 42. and a second triode.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
As mentioned in the background, prior art relay adhesion detection is not stable, and in order to solve the above problems, in an exemplary embodiment of the present application, a detection device is provided.
According to an embodiment of the present application, there is provided a detection apparatus for detecting adhesion of a relay, as shown in fig. 1, the relay 01 to be detected includes a first end 02 and a second end 03, the first end is electrically connected to a positive electrode of a power battery, the second end is electrically connected to a negative electrode of the power battery, as shown in fig. 2 and 3, the detection apparatus includes:
a first voltage acquisition circuit 10, electrically connected to the first end 02, for acquiring a first voltage signal;
a second voltage collecting circuit 20 electrically connected to the second terminal 03 for collecting a second voltage signal, wherein the second voltage collecting circuit 20 is the same as the first voltage collecting circuit 10;
and the alarm is respectively and electrically connected with the first voltage acquisition circuit and the second voltage acquisition circuit and is used for sending alarm information according to the first voltage signal and the second voltage signal.
Among the above-mentioned detection device, after the relay that awaits measuring breaks off, first voltage acquisition circuit is connected with the first end electricity of the relay that awaits measuring, in order to gather first voltage signal, second voltage acquisition circuit is connected with the second end electricity of the relay that awaits measuring, in order to gather second voltage signal, and second voltage acquisition circuit is the same with first voltage acquisition circuit, the alarm can be through comparing first voltage signal and second voltage signal, confirm whether the relay that awaits measuring adheres, thereby send alarm information, compare in the easy failure of auxiliary contact, the stability of detection has been improved, the problem of the prior art relay adhesion detection instability has been solved.
It should be noted that an air switch (not shown in the figure) is disposed on a connection line between the power battery and the relay to be tested, and the detection device adopts a lower-point detection mode, that is, the detection is performed when the relay to be tested is turned off and the air switch is not turned off.
In an embodiment of the present application, as shown in fig. 2, the first voltage collecting circuit 10 includes a first voltage dividing circuit and a first voltage collecting terminal 11, wherein the first voltage dividing circuit includes a plurality of first voltage dividing resistors 12, the plurality of first voltage dividing resistors 12 are sequentially connected in series, one terminal of the first voltage dividing circuit is electrically connected to the first terminal 02, and the other terminal of the first voltage dividing circuit is connected to a negative electrode HV — "of the power battery; the first voltage collecting terminal 11 is electrically connected to a first connection line, the first voltage collecting terminal 11 is used for outputting the first voltage signal, and the first connection line is a connection line between any two adjacent first voltage dividing resistors 12. Specifically, above-mentioned power battery's output voltage is higher, and above-mentioned first voltage divider circuit can regulate and control voltage for the first voltage signal of voltage acquisition end output is adjustable, thereby can adjust voltage acquisition end output voltage to suitable scope, is convenient for detect first voltage signal.
In an embodiment of the present application, as shown in fig. 3, the second voltage collecting circuit 20 includes a second voltage dividing circuit and a second voltage collecting terminal 21, wherein the second voltage dividing circuit includes a plurality of second voltage dividing resistors 22, the plurality of second voltage dividing resistors 22 are sequentially connected in series, one end of the second voltage dividing circuit is electrically connected to the second terminal 03, and the other end of the second voltage dividing circuit is connected to the negative electrode HV-; the second voltage collecting terminal 21 is electrically connected to a second connection circuit, the second voltage collecting terminal 21 is used for outputting the second voltage signal, and the second connection circuit is a connection circuit between any two adjacent second voltage dividing resistors 22. Specifically, above-mentioned power battery's output voltage is higher, and above-mentioned second voltage divider circuit can regulate and control voltage for the second voltage signal of voltage acquisition end output is adjustable, thereby can adjust voltage acquisition end output voltage to suitable scope, is convenient for detect the second voltage signal.
In an actual detection process, since the alarm is powered by the storage battery, when the power supply of the storage battery is stopped immediately after the relay to be detected is disconnected, for example, when an electric vehicle stops and a low voltage is disconnected immediately, the detection has not started to turn off the air switch, so that whether the relay to be detected is stuck or not cannot be detected, in an embodiment of the present application, as shown in fig. 4, the apparatus further includes a power-on circuit 30 and a reference circuit 40, wherein the power-on circuit 30 includes a first switch 31, one end of the first switch 31 is electrically connected to the first end 02, and the other end of the first switch 31 is electrically connected to a positive electrode VCC + of the storage battery; the reference circuit 40 includes a second switch 41, one end of the second switch 41 is connected to a negative electrode HV-of the power battery, and one end of the second switch 41 is connected to a negative electrode VCC-of the battery. Specifically, in the process of powering on the electric automobile, low-voltage powering on is performed first, then high-voltage powering on is performed, namely, the storage battery starts to supply power first, then the air switch is closed, the power battery starts to supply power, after the low-voltage powering on and before the high-voltage powering on, the first switch and the second switch are controlled to be closed, namely, the storage battery is adopted to supply power for the first voltage acquisition circuit and the second voltage acquisition circuit, and the negative pole VCC-of the storage battery is connected with the negative pole HV-of the power battery as a reference ground, so that the power-on detection of the relay to be detected is realized, therefore, the detection device can perform both power-off detection and power-on detection, and the stability of relay adhesion detection is.
In an embodiment of the present application, the alarm includes an analog-to-digital converter and a processor, the analog-to-digital converter is connected to the first voltage collecting terminal and the second voltage collecting terminal, and the analog-to-digital converter is configured to convert the first voltage signal and the first voltage signal into a first voltage value and a second voltage value, respectively; the processor is electrically connected with the analog-digital converter and used for sending out alarm information according to the first voltage value and the second voltage value. Specifically, the adc converts the first voltage signal and the first voltage signal into a first voltage value and a second voltage value, respectively, the processor compares the first voltage value and the second voltage value, determines that the relay to be tested is adhered and sends out an alarm message when a difference between the first voltage value and the second voltage value is within an error range, and determines that the relay to be tested is not adhered and does not send out an alarm message when the difference between the first voltage value and the second voltage value is not within the error range.
It should be noted that, the above-mentioned device further includes an isolator, an output end of the isolator is connected to the first voltage acquisition end and the second voltage acquisition end, and an output end of the isolator is connected to the analog-to-digital converter, so as to reduce interference and further improve accuracy of detection.
In one embodiment of the present application, as shown in fig. 4, the first switch is a first relay, the power-up circuit 30 further includes a first transistor 32, one end of a coil of the first relay is electrically connected to the positive electrode VCC + of the battery, the other end of the coil of the first relay is electrically connected to the emitter of the first transistor 32, the second switch is a second relay, the reference circuit 40 further includes a second transistor 42, one end of a coil of the second relay is electrically connected to the positive electrode VCC + of the battery, the other end of the coil of the second relay is electrically connected to the emitter of the second transistor 42, the collectors of the first transistor 32 and the second transistor 42 are electrically connected to the negative electrode VCC-of the battery, the apparatus further includes a controller, the controller is electrically connected to the base of the first transistor 32 and the base of the second transistor 42, for transmitting the enable signal. Specifically, under the condition that electric automobile was gone up to the electricity under the low pressure, above-mentioned controller switches on through the projecting pole and the collecting electrode of enabling signal control first triode and second triode, and the coil of first relay and second relay circular telegram for first relay and second relay are closed, thereby realize going up the electric detection to the relay that awaits measuring.
In an embodiment of the present application, as shown in fig. 2, the first voltage collecting circuit 10 further includes a first clamping circuit 13, the first clamping circuit 13 includes a first clamping diode 131, a second clamping diode 132, and a first voltage limiting terminal 133, an anode of the first clamping diode 131 is electrically connected to a negative electrode HV-of the power battery, a cathode of the first clamping diode 131 is electrically connected to an anode of the second clamping diode 132 and the first voltage collecting terminal 11, a cathode of the second clamping diode 132 is electrically connected to the first voltage limiting terminal 133, and the first voltage limiting terminal 133 is configured to provide a first clamping voltage. Specifically, the output voltage of the first voltage acquisition end is greater than the breakdown voltage of the first clamping diode, the first clamping diode is conducted reversely, so that current flows into the negative electrode HV & lt- & gt of the power battery, the voltage is prevented from being too high, the voltage alarm is damaged, the output voltage of the first voltage acquisition end is greater than the first clamping voltage, the second clamping diode is conducted, the output voltage of the first voltage acquisition end is limited below the first clamping voltage, and voltage detection is facilitated.
In an embodiment of the present invention, as shown in fig. 3, the second voltage collecting circuit 20 further includes a second clamping circuit 23, the second clamping circuit 23 includes a third clamping diode 231, a fourth clamping diode 232, and a second voltage limiting terminal 233, an anode of the third clamping diode 231 is electrically connected to the negative electrode HV-of the power battery, a cathode of the third clamping diode 231 is electrically connected to an anode of the fourth clamping diode 232 and the second voltage collecting terminal 21, a cathode of the fourth clamping diode 232 is electrically connected to the second voltage limiting terminal 233, and the second voltage limiting terminal 233 is configured to provide a second clamping voltage. Specifically, the output voltage of the second voltage collection end is greater than the breakdown voltage of the third clamping diode, the third clamping diode is conducted reversely, so that current flows into the negative electrode HV < - > of the power battery, the voltage is prevented from being too high, the voltage alarm is damaged, the output voltage of the second voltage collection end is greater than the second clamping voltage, the fourth clamping diode is conducted, and the output voltage of the second voltage collection end is limited below the second clamping voltage, so that the voltage is detected conveniently.
In an embodiment of the present application, as shown in fig. 2, the first voltage collecting circuit 10 further includes a first capacitor 14 and a first current limiting resistor 15, wherein the first capacitor 14 includes a third end and a fourth end, the third end is electrically connected to the first voltage collecting end 11, and the fourth end is electrically connected to the negative electrode HV-of the power battery; the first current limiting resistor 15 is located on a connection line between the first voltage collecting terminal 11 and the first connection line. Specifically, above-mentioned first electric capacity carries out the filtering to first voltage output signal, improves the accuracy that voltage detected, and then improves the accuracy that the adhesion detected, and first current-limiting resistance carries out the current-limiting, prevents that the electric current is too big, damages the device.
In an embodiment of the present application, as shown in fig. 3, the second voltage collecting circuit 20 further includes a second capacitor 24 and a second current limiting resistor 25, where the second capacitor 24 includes a fifth end and a sixth end, the fifth end is electrically connected to the second voltage collecting end 21, and the sixth end is electrically connected to the negative electrode HV-of the power battery; the second current limiting resistor 25 is located on a connection line between the second voltage collecting terminal 21 and the second connection line. Specifically, above-mentioned second electric capacity carries out the filtering to first voltage output signal, improves the accuracy that voltage detected, and then improves the accuracy that the adhesion detected, and the second current-limiting resistance carries out the current-limiting, prevents that the electric current is too big, damages the device.
From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:
in the detection device of this application, after the relay that awaits measuring breaks off, first voltage acquisition circuit is connected with the first end electricity of the relay that awaits measuring, with gather first voltage signal, second voltage acquisition circuit is connected with the second end electricity of the relay that awaits measuring, with gather second voltage signal, and second voltage acquisition circuit is the same with first voltage acquisition circuit, the alarm can be through comparing first voltage signal and second voltage signal, confirm whether the relay that awaits measuring adheres, thereby send alarm information, compare in the easy failure of auxiliary contact, the stability of detection has been improved, the problem of the prior art relay adhesion detection instability has been solved.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The utility model provides a detection device for detect the adhesion of the relay that awaits measuring, its characterized in that, the relay that awaits measuring includes first end and second end, first end and power battery's anodal electric connection, the second end with power battery's negative pole electricity is connected, the device includes:
the first voltage acquisition circuit is electrically connected with the first end and used for acquiring a first voltage signal;
the second voltage acquisition circuit is electrically connected with the second end and used for acquiring a second voltage signal, and the second voltage acquisition circuit is the same as the first voltage acquisition circuit;
and the alarm is respectively and electrically connected with the first voltage acquisition circuit and the second voltage acquisition circuit and is used for sending alarm information according to the first voltage signal and the second voltage signal.
2. The apparatus of claim 1, wherein the first voltage acquisition circuit comprises:
the first voltage division circuit comprises a plurality of first voltage division resistors which are sequentially connected in series, one end of the first voltage division circuit is electrically connected with the first end, and the other end of the first voltage division circuit is connected with the negative electrode of the power battery;
the first voltage acquisition end is electrically connected with a first connecting circuit and used for outputting the first voltage signal, and the first connecting circuit is a connecting circuit between any two adjacent first voltage dividing resistors.
3. The apparatus of claim 2, wherein the second voltage acquisition circuit comprises:
the second voltage division circuit comprises a plurality of second voltage division resistors which are sequentially connected in series, one end of the second voltage division circuit is electrically connected with the second end, and the other end of the second voltage division circuit is connected with the negative electrode of the power battery;
and the second voltage acquisition end is electrically connected with the second connecting circuit and is used for outputting the second voltage signal, and the second connecting circuit is a connecting circuit between any two adjacent second voltage division resistors.
4. The apparatus of claim 3, further comprising:
the power-on circuit comprises a first switch, one end of the first switch is electrically connected with the first end, and the other end of the first switch is electrically connected with the positive electrode of the storage battery;
and the reference circuit comprises a second switch, one end of the second switch is connected with the negative electrode of the power battery, and one end of the second switch is connected with the negative electrode of the storage battery.
5. The device of claim 3, wherein the alarm comprises:
the analog-digital converter is connected with the first voltage acquisition end and the second voltage acquisition end and is used for converting the first voltage signal and the first voltage signal into a first voltage value and a second voltage value respectively;
and the processor is electrically connected with the analog-digital converter and used for sending out alarm information according to the first voltage value and the second voltage value.
6. The apparatus of claim 4, wherein the first switch is a first relay, the power-up circuit further comprises a first transistor, one end of a coil of the first relay is electrically connected to the positive electrode of the battery, the other end of the coil of the first relay is electrically connected to the emitter of the first transistor, the second switch is a second relay, the reference circuit further comprises a second transistor, one end of a coil of the second relay is electrically connected to the positive electrode of the battery, the other end of the coil of the second relay is electrically connected to the emitter of the second transistor, the collectors of the first transistor and the second transistor are electrically connected to the negative electrode of the battery, the apparatus further comprising:
and the controller is electrically connected with the base electrode of the first triode and the base electrode of the second triode and is used for sending an enabling signal.
7. The apparatus of claim 2, wherein the first voltage acquisition circuit further comprises:
the first clamping circuit comprises a first clamping diode, a second clamping diode and a first voltage limiting end, wherein the anode of the first clamping diode is electrically connected with the cathode of the power battery, the cathode of the first clamping diode is electrically connected with the anode of the second clamping diode and the first voltage collecting end, the cathode of the second clamping diode is electrically connected with the first voltage limiting end, and the first voltage limiting end is used for providing first clamping voltage.
8. The apparatus of claim 3, wherein the second voltage acquisition circuit further comprises:
the second clamping circuit comprises a third clamping diode, a fourth clamping diode and a second voltage limiting end, wherein the anode of the third clamping diode is electrically connected with the cathode of the power battery, the cathode of the third clamping diode is electrically connected with the anode of the fourth clamping diode and the second voltage collecting end, the cathode of the fourth clamping diode is electrically connected with the second voltage limiting end, and the second voltage limiting end is used for providing second clamping voltage.
9. The apparatus of claim 2, wherein the first voltage acquisition circuit further comprises:
the first capacitor comprises a third end and a fourth end, the third end is electrically connected with the first voltage acquisition end, and the fourth end is electrically connected with the negative electrode of the power battery;
and the first current limiting resistor is positioned on a connecting circuit of the first voltage acquisition end and the first connecting circuit.
10. The apparatus of claim 3, wherein the second voltage acquisition circuit further comprises:
the second capacitor comprises a fifth end and a sixth end, the fifth end is electrically connected with the second voltage acquisition end, and the sixth end is electrically connected with the negative electrode of the power battery;
and the second current-limiting resistor is positioned on a connecting line of the second voltage acquisition end and the second connecting line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021885486.9U CN213633722U (en) | 2020-09-01 | 2020-09-01 | Detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021885486.9U CN213633722U (en) | 2020-09-01 | 2020-09-01 | Detection device |
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| CN213633722U true CN213633722U (en) | 2021-07-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117518042A (en) * | 2024-01-05 | 2024-02-06 | 赛卓电子科技(上海)股份有限公司 | Output stage circuit and sensor |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117518042A (en) * | 2024-01-05 | 2024-02-06 | 赛卓电子科技(上海)股份有限公司 | Output stage circuit and sensor |
| CN117518042B (en) * | 2024-01-05 | 2024-04-30 | 赛卓电子科技(上海)股份有限公司 | Output stage circuit and sensor |
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