CN215850764U - Detection circuit for accurately positioning high-voltage interlocking fault plug-in - Google Patents
Detection circuit for accurately positioning high-voltage interlocking fault plug-in Download PDFInfo
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- CN215850764U CN215850764U CN202023091412.0U CN202023091412U CN215850764U CN 215850764 U CN215850764 U CN 215850764U CN 202023091412 U CN202023091412 U CN 202023091412U CN 215850764 U CN215850764 U CN 215850764U
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Abstract
The utility model discloses a detection circuit for accurately positioning a high-voltage interlocking fault plug-in, which comprises a first plug-in, a second plug-in, a third plug-in, a fourth plug-in, a fifth plug-in, a sixth plug-in and a monitoring unit, wherein a first interlocking terminal is integrated on the first plug-in, a second interlocking terminal is integrated on the second plug-in, a third interlocking terminal is integrated on the third plug-in, a fourth interlocking terminal is integrated on the fourth plug-in, a fifth interlocking terminal is integrated on the fifth plug-in, a sixth interlocking terminal is integrated on the sixth plug-in, the first plug-in is connected with a 620 +/-1% omega resistor in series, the second plug-in is connected with a 1780 +/-1% omega resistor in series, the third plug-in is connected with a 3240 +/-1% omega resistor in series, the fourth plug-in is connected with a 7500 +/-1% omega resistor in series, the fifth plug-in is connected with a 15000 +/-1% omega resistor in series, the sixth plug-in is connected with 37400 +/-1% resistor in series, and the resistance of the first plug-in series, The second plug-in unit, the third plug-in unit, the fourth plug-in unit, the fifth plug-in unit and the sixth plug-in unit are connected in parallel and then are connected with the monitoring unit.
Description
Technical Field
The utility model relates to a detection circuit for accurately positioning a high-voltage interlocking fault plug-in unit, and belongs to the technical field of charging and discharging of pure electric vehicles.
Background
One of the risk points of the high-voltage system of the electric vehicle is sudden power failure, and the vehicle loses power, which may cause the vehicle to lose power, has several reasons, one of which is that the high-voltage loop automatically loosens. The high-voltage interlocking circuit can monitor the sign, provide alarm information for the whole vehicle controller before high-voltage power failure and reserve time for taking countermeasures for the whole vehicle system. Currently, the mainstream detection method is to use a Battery Management System (BMS) or a Vehicle Control Unit (VCU) as a detection module to detect a level signal of a high-voltage interlock loop to determine whether the high-voltage loop is normal. Generally, a high-voltage circuit of an electric automobile is complex, a plurality of high-voltage plug-in units are arranged, and a high-voltage interlocking circuit is connected with each plug-in unit in series through a low-voltage terminal to form a low-voltage monitoring circuit. Once a certain plug-in components in the high-voltage circuit have the risk of falling off, the low-voltage detection circuit is disconnected before the power terminal, and at the moment, the detection module cannot receive the level signal and then alarms, but the detection module can only alarm and cannot accurately locate the plug-in components with problems, so that great inconvenience is brought to the examination. If monitoring is carried out on each plug-in unit, more I/O port resources are needed, and therefore the detection circuit for accurately positioning the high-voltage interlocking fault plug-in unit is designed and used for accurately judging the fault point of the high-voltage plug-in unit.
Disclosure of Invention
The utility model provides a detection circuit for accurately positioning a high-voltage interlocking fault plug-in unit to solve the problems in the prior art, does not additionally occupy the I/O resource of a detection module controller, can accurately position the high-voltage plug-in unit with the falling risk, and further provides reliable early warning.
The technical scheme adopted by the utility model is as follows: a detection circuit for accurately positioning a high-voltage interlocking fault plug-in comprises a first plug-in, a second plug-in, a third plug-in, a fourth plug-in, a fifth plug-in, a sixth plug-in and a detection module, wherein a first interlocking terminal is integrated on the first plug-in, a second interlocking terminal is integrated on the second plug-in, a third interlocking terminal is integrated on the third plug-in, a fourth interlocking terminal is integrated on the fourth plug-in, a fifth interlocking terminal is integrated on the fifth plug-in, a sixth interlocking terminal is integrated on the sixth plug-in, the first plug-in is connected with a 620 +/-1% omega resistor in series, the second plug-in is connected with a 1780 +/-1% omega resistor in series, the third plug-in is connected with a 3240 +/-1% omega resistor in series, the fourth plug-in is connected with a 7500 +/-1% omega resistor in series, the fifth plug-in is connected with a 15000 +/-1% omega resistor in series, the sixth plug-in series with 37400 +/-1% resistor series, the first plug-in, the second plug-in and the second plug-in series, And the third plug-in, the fourth plug-in, the fifth plug-in and the sixth plug-in are connected in parallel and then connected with the detection module.
The utility model has the following beneficial effects:
(1) not increasing the I/O port of the detection module;
(2) the plug-in unit with high-voltage interlocking fault can be accurately judged;
(3) can provide reliable early warning of high voltage interlock.
Drawings
FIG. 1 is a schematic diagram of a detection circuit for accurately positioning a high-voltage interlock fault interposer according to the present invention.
Detailed Description
The utility model will be further described with reference to the accompanying drawings.
The detection circuit for accurately positioning the high-voltage interlocking fault plug-in comprises a first plug-in 1, a second plug-in 2, a third plug-in 3, a fourth plug-in 4, a fifth plug-in 5 and a sixth plug-in 6, wherein the first plug-in 1 is integrated with a first interlocking terminal, the second plug-in 2 is integrated with a second interlocking terminal, the third plug-in 3 is integrated with a third interlocking terminal, the fourth plug-in 4 is integrated with a fourth interlocking terminal, the fifth plug-in 5 is integrated with a fifth interlocking terminal, and the sixth plug-in 6 is integrated with a sixth interlocking terminal. The first plug-in 1 is connected with a resistor of 620 +/-1% omega in series, the second plug-in 2 is connected with a resistor of 1780 +/-1% omega in series, the third plug-in is connected with a resistor of 3240 +/-1% omega in series, the fourth plug-in is connected with a resistor of 7500 +/-1% omega in series, the fifth plug-in is connected with a resistor of 15000 +/-1% omega in series, and the sixth plug-in is connected with a resistor of 37400 +/-1% omega in series.
The first plug-in unit 1, the second plug-in unit 2, the third plug-in unit 3, the fourth plug-in unit 4, the fifth plug-in unit 5 and the sixth plug-in unit 6 are connected in parallel and then connected with the detection module.
The detection module monitors a first plug-in unit 1, a second plug-in unit 2, a third plug-in unit 3, a fourth plug-in unit 4, a fifth plug-in unit 5 and a sixth plug-in unit 6, a first interlocking terminal, a second interlocking terminal, a third interlocking terminal, a fourth interlocking terminal, a fifth interlocking terminal and a sixth interlocking terminal are equivalent to switches and are used for serially connecting resistors with respective resistance values, and each interlocking terminal is serially connected with resistors with different resistance values. When the first plug-in unit 1, the second plug-in unit 2, the third plug-in unit 3, the fourth plug-in unit 4, the fifth plug-in unit 5 and the sixth plug-in unit 6 are normal, all resistors with resistance values are connected in parallel, and the resistance values are monitored by the detection module. If a certain plug-in has a falling risk, the resistor connected with the interlocking terminals in series is disconnected, the resistance value changes at the moment, and the detection module reports the position of the plug-in with a fault after monitoring the resistance value change. Wherein different resistance values correspond to different inserts.
The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the utility model and these modifications should also be considered as the protection scope of the utility model.
Claims (1)
1. A detection circuit for accurately positioning a high-voltage interlocking fault plug-in is characterized in that: the detection device comprises a first plug-in (1), a second plug-in (2), a third plug-in (3), a fourth plug-in (4), a fifth plug-in (5), a sixth plug-in (6) and a detection module, wherein a first interlocking terminal is integrated on the first plug-in (1), a second interlocking terminal is integrated on the second plug-in (2), a third interlocking terminal is integrated on the third plug-in (3), a fourth interlocking terminal is integrated on the fourth plug-in (4), a fifth interlocking terminal is integrated on the fifth plug-in (5), a sixth interlocking terminal is integrated on the sixth plug-in (6), the first omega plug-in (1) is connected with the omega resistor of 620 +/-1% in series, the second plug-in (2) is connected with the omega resistor of 1780 +/-1% in series, the third plug-in (3) is connected with the omega resistor of 3240 +/-1% in series, the fourth plug-in (4) is connected with the omega resistor of 7500 +/-1%, the fifth plug-in series is connected with the resistor of 15000 +/-1% in series, the sixth plug-in (6) is connected with 37400 +/-1% omega resistor in series, and the first plug-in (1), the second plug-in (2), the third plug-in (3), the fourth plug-in (4), the fifth plug-in (5) and the sixth plug-in (6) are connected in parallel and then connected with the detection module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023091412.0U CN215850764U (en) | 2020-12-21 | 2020-12-21 | Detection circuit for accurately positioning high-voltage interlocking fault plug-in |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023091412.0U CN215850764U (en) | 2020-12-21 | 2020-12-21 | Detection circuit for accurately positioning high-voltage interlocking fault plug-in |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215850764U true CN215850764U (en) | 2022-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023091412.0U Active CN215850764U (en) | 2020-12-21 | 2020-12-21 | Detection circuit for accurately positioning high-voltage interlocking fault plug-in |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215850764U (en) |
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2020
- 2020-12-21 CN CN202023091412.0U patent/CN215850764U/en active Active
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