CN217156660U - High-voltage loop interlocking detection circuit based on resistance voltage division - Google Patents
High-voltage loop interlocking detection circuit based on resistance voltage division Download PDFInfo
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- CN217156660U CN217156660U CN202122663346.8U CN202122663346U CN217156660U CN 217156660 U CN217156660 U CN 217156660U CN 202122663346 U CN202122663346 U CN 202122663346U CN 217156660 U CN217156660 U CN 217156660U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The utility model discloses a high-voltage loop interlocking detection circuit based on resistance voltage division, which comprises a high-voltage loop interlocking system, a first resistor, a second resistor, a first voltage monitoring device and a second voltage monitoring device, wherein one end of the first resistor is connected with the output end of the high-voltage loop interlocking system, the other end of the first resistor is connected to a power supply, one end of the second resistor is connected with the input end of the high-voltage loop interlocking system, and the other end of the second resistor is grounded; one end of the first voltage monitoring device is connected with the output end of the high-voltage loop interlocking system, the other end of the first voltage monitoring device is grounded, and the second voltage monitoring device is connected with the second resistor in parallel; the matching resistance of the first resistor and the second resistor enables the input port and the output port of the high-voltage loop interlocking system to be short-circuited to a power supply or to the ground, and the input point is high level when the input and the output of the power supply are short-circuited. The utility model discloses a high-voltage loop interlocking detection circuitry has the advantage of simple, reliable, low-cost and low-power consumption, and does not influence outside ECU and normally works.
Description
Technical Field
The utility model relates to a high pressure detection circuitry, concretely relates to high-pressure loop interlock detection circuitry based on resistance partial pressure.
Background
The existing high-voltage loop interlocking system (HVIL) is a safety design method for monitoring the integrity of a high-voltage loop by using a low-voltage signal, all components connected with a high-voltage wire harness on an electric automobile are checked by using the low-voltage signal, the electrical connection integrity and continuity of each high-voltage system loop are detected, and the existing detection method of the high-voltage loop interlocking system mainly comprises a high-potential effective circuit, a pulse control circuit, a constant-current source detection circuit and the like; the output end of the high potential effective detection circuit outputs a high level signal, and the input end acquires a level state, so that the short circuit to a power supply and the short circuit to the ground cannot be effectively diagnosed; the output end of the pulse control detection circuit periodically controls the signal height change, the input end judges the interlocking state according to the output, the circuit logic is complex, and the low level can influence the normal functions of other ECUs; the output end of the constant current source detection circuit is a constant current output signal with the load capacity of about 10mA, and the detection circuit is high in cost and large in power consumption.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high-pressure loop interlock detection circuitry based on resistance partial pressure, this circuit have simple, reliable, low-cost and low-power consumption's advantage, and do not influence outside ECU normal work.
Realize the utility model discloses the technical scheme of purpose does: a high-voltage loop interlocking detection circuit based on resistance voltage division comprises a high-voltage loop interlocking system, a first resistor, a second resistor, a first voltage monitoring device and a second voltage monitoring device, wherein one end of the first resistor is connected with the output end of the high-voltage loop interlocking system, the other end of the first resistor is connected to a power supply, one end of the second resistor is connected with the input end of the high-voltage loop interlocking system, and the other end of the second resistor is grounded; one end of the first voltage monitoring device is connected with the output end of the high-voltage loop interlocking system, the other end of the first voltage monitoring device is grounded, and the second voltage monitoring device is connected with the second resistor in parallel; the matching resistance of the first resistor and the second resistor enables the input port and the output port of the high-voltage loop interlocking system to be short-circuited to a power supply or to the ground, and the input point is high level when the input and the output of the power supply are short-circuited.
Further, the control switch is connected between the first resistor and the power supply in series.
Furthermore, the system also comprises a relay, one end of the relay is connected with the input end of the high-voltage loop interlocking system, one end of the relay is connected with the power supply in a normally closed mode, and the other end of the relay is connected with the power supply of the relay.
Furthermore, the resistance range of the first resistor is 510 omega-1.2 k omega, and the ratio of the second resistor to the first resistor is 2-10.
Further, the power supply is 12V or 24V.
Furthermore, the first resistor and the second resistor both adopt adjustable resistors.
Compared with the prior art, the utility model, it is showing the effect and is: the utility model discloses detection circuit carries out interlocking signal detection through the design of resistance partial pressure + two way voltage acquisition, and detection circuit is simple; the utility model discloses the join in marriage of first resistance R1, second resistance R2 hinders and satisfies maximum supply voltage short circuit to ground requirement and normal supply voltage 10mA area load ability, and the input point is the high level and effectively distinguishes the short circuit to power supply VCC when satisfying minimum voltage power supply simultaneously; the utility model discloses detection circuitry's diagnostic capability is strong, can diagnose the abnormity of opening a way, short circuit and contact resistance, and does not influence outside ECU normal work.
Drawings
Fig. 1 the utility model discloses high-voltage loop interlock detection circuit topological diagram of embodiment 1.
Fig. 2 the utility model discloses high-voltage loop interlock detection circuit topological diagram of embodiment 2.
Fig. 3 the utility model discloses high-voltage loop interlock detection circuit topological diagram of embodiment 3.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
With reference to fig. 1, a high voltage loop interlock detection circuit based on resistance voltage division includes a first resistor R1, a second resistor R2, a first voltage monitoring device V1 and a second voltage monitoring device V2, a high voltage loop interlock system (HVIL) includes a signal output terminal and an input terminal, the output terminal of the high voltage loop interlock system is connected to a power supply VCC through a first resistor R1, the input terminal thereof is connected to ground through a second resistor R2, the first voltage monitoring device V1 is connected between the output terminal of the high voltage loop interlock system and a ground terminal, and the second voltage monitoring device V2 is connected between the input terminal of the high voltage loop interlock system and the ground terminal. The first resistor R1 and the second resistor R2 are matched to meet the requirements that the input port and the output port are short-circuited to a power supply and the ground, and meanwhile, the input point is high level when the power supply voltage is input and output in short circuit.
Two resistors with the same specification can be considered to be connected in series or the self-calculation standard when the first resistor R1 and the second resistor R2 are matched, the first resistor R1 and the second resistor R2 both adopt adjustable resistors, and specific matching for a 12V system or a 24V system is as follows:
resistance range of the first resistor R1: 510 to 1.2k omega, and simultaneously meets the requirement of the maximum supply voltage on short circuit to the ground and the normal supply voltage of 10mA load capacity (the requirement of no load capacity is properly improved);
the ratio of the second resistor R2 to the first resistor R1 is in the range of 2-10, and meanwhile, the input point is high level when the lowest voltage power supply is met and the short circuit to VCC is effectively distinguished.
The detection method based on the circuit comprises the following steps:
(1) if V1 ═ V2 and V1 ═ R1+ R2)/R2 ═ VCC, the interlock signal is normal; otherwise, the interlocking signal is abnormal;
(2) the interlock signal is abnormal:
for V1 ═ V2 and V1 ═ R1+ R2)/R2> VCC, if V1 ═ VCC, it is determined that the high-voltage loop interlock system is shorted to the power supply; if V1< VCC, there is resistance (low insulation to power) between the loop interlock signal and the power supply of the high voltage loop interlock system;
for V1 ═ V2 and V1 ═ R1+ R2)/R2< VCC, if V1 ═ 0, the high voltage loop interlock system shorts to ground, if V1>0, there is resistance between the high voltage loop interlock system interlock signal and ground (low insulation to ground);
for V1! V2, if V1 is 0 and V2 is VCC, the loop interlock signal is open; if V1>0, the connection resistance between the interlock signal input and output is too large (contact failure).
Example 2
With reference to fig. 2, this embodiment provides a high-voltage loop interlock detection circuit based on resistance voltage division, which includes all the features of embodiment 1, and differs from embodiment 1 in that a control switch is added, and the control switch is connected in series between a first resistor R1 and a power source VCC, so as to realize controllable output, and can cut off the output when an external fault occurs. Power consumption is reduced.
Example 3
With reference to fig. 3, the embodiment provides a high-voltage loop interlock detection circuit based on resistance voltage division, which includes all the features of embodiment 1, and is different from embodiment 1 in that an input signal is serially connected to a relay power supply circuit, one end of the relay is connected to an input end of a high-voltage loop interlock system, the other end of the relay is normally closed to a power source VCC, the other end of the relay is connected to a relay power source, when an input end of the high-voltage loop interlock system is at a low level, the relay power supply is cut off through hardware, and it is ensured that the high voltage is cut off when the high-voltage loop interlock system is opened in hardware.
Claims (6)
1. The high-voltage loop interlocking detection circuit based on resistance voltage division comprises a high-voltage loop interlocking system and is characterized by further comprising a first resistor (R1), a second resistor (R2), a first voltage monitoring device (V1) and a second voltage monitoring device (V2), wherein one end of the first resistor (R1) is connected with the output end of the high-voltage loop interlocking system, the other end of the first resistor is connected to a power supply (VCC), one end of the second resistor (R2) is connected with the input end of the high-voltage loop interlocking system, and the other end of the second resistor is grounded; one end of the first voltage monitoring device (V1) is connected with the output end of the high-voltage loop interlocking system, the other end of the first voltage monitoring device is grounded, and the second voltage monitoring device (V2) is connected with the second resistor (R2) in parallel; the matching resistance of the first resistor (R1) and the second resistor (R2) enables the input port and the output port of the high-voltage loop interlocking system to be short-circuited to a power supply or to the ground, and when the input port and the output port of the power supply (VCC) are short-circuited, the input point is at a high level.
2. The circuit according to claim 1, further comprising a control switch connected in series between the first resistor (R1) and the power supply (VCC).
3. The high-voltage loop interlocking detection circuit based on resistance voltage division as claimed in claim 1, further comprising a relay, wherein one end of the relay is connected with the input end of the high-voltage loop interlocking system, one end of the relay is normally closed with a power supply (VCC), and the other end of the relay is connected with the power supply of the relay.
4. The high-voltage loop interlock detection circuit based on resistance voltage division according to any one of claims 1 to 3, wherein the first resistor (R1) has a resistance value ranging from 510 Ω to 1.2kΩ, and the ratio of the second resistor (R2) to the first resistor (R1) is 2 to 10.
5. The circuit according to claim 4, wherein the power supply (VCC) is 12V or 24V.
6. The high-voltage loop interlock detection circuit based on resistance voltage division according to claim 4, wherein the first resistor (R1) and the second resistor (R2) both adopt adjustable resistors.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122473221 | 2021-10-14 | ||
| CN2021224732219 | 2021-10-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217156660U true CN217156660U (en) | 2022-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122663346.8U Active CN217156660U (en) | 2021-10-14 | 2021-11-02 | High-voltage loop interlocking detection circuit based on resistance voltage division |
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| CN (1) | CN217156660U (en) |
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2021
- 2021-11-02 CN CN202122663346.8U patent/CN217156660U/en active Active
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