CN106885967A - A kind of high-voltage interlocking detection means and method - Google Patents
A kind of high-voltage interlocking detection means and method Download PDFInfo
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- CN106885967A CN106885967A CN201710135492.9A CN201710135492A CN106885967A CN 106885967 A CN106885967 A CN 106885967A CN 201710135492 A CN201710135492 A CN 201710135492A CN 106885967 A CN106885967 A CN 106885967A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Abstract
The invention discloses a kind of high-voltage interlocking detection means, including microprocessor, and high-tension connector, signal generator and the detection unit for connecting into loop；The detection unit includes that the detection resistance being serially connected in the loop and input are connected respectively to the signal conditioning circuit at detection resistance two ends；The signal generator is used to produce square wave current detection signal in the loop；The signal conditioning circuit is used to obtain the pressure drop at the detection resistance two ends, and according to the pressure drop outputs level signals；The microprocessor is used to judge the connection status of the high-tension connector and the working condition of the high-voltage interlocking detection means according to the level signal.Accordingly, the invention also discloses a kind of high-voltage interlocking detection method.Using the embodiment of the present invention, it is possible to increase the accuracy of detection, and interference rejection capability is strong.
Description
Technical field
The present invention relates to electric automobile or the technical field of other high-pressure systems being made up of multiple high voltage components, especially relate to
And a kind of high-voltage interlocking detection means and method.
Background technology
Should possess high-voltage interlocking loop detection function to avoid high-tension electricity from injuring the high-pressure systems such as hidden danger, electric automobile,
I.e.：The connector of high voltage component is constituted into an interlocked rings, detection loop " break-make " state judges the abnormal shape of high-pressure system
Condition (such as collision, abnormal operation disconnect high-tension connector).
Current widespread practice is a level signal to be produced by signal generating circuit, through high-tension connector and filtered electrical
Lu Hou, detects level height to judge the break-make of loop.But, the scheme of this detection level height, in interlocking loop wire cable
It is possible to be shorted to ground or power supply during abrasion, or detection circuit is short-circuited failure, so as to cause output level to change, leads
Cause error detection.
In addition, it is to send voltage pwm signal also to have part detection scheme, after interlocking loop, output pwm signal is detected
Judge the break-make of loop.But, the scheme of this detection voltage pwm signal, antijamming capability is not strong, and testing result easily receives high pressure
Circuit is disturbed.
The content of the invention
The embodiment of the present invention proposes a kind of high-voltage interlocking detection means and method, it is possible to increase the accuracy of detection, and dry
Disturb rejection ability strong.
The embodiment of the present invention provides a kind of high-voltage interlocking detection means, including microprocessor, and the height for connecting into loop
Pressure connector, signal generator and detection unit；The detection unit includes being serially connected in detection resistance in the loop and defeated
Enter the signal conditioning circuit that end is connected respectively to detection resistance two ends；
The signal generator is used to produce square wave current signal in the loop；
The signal conditioning circuit is used to obtain the pressure drop at the detection resistance two ends, and according to the pressure drop output level
Signal；
The microprocessor is used to judge according to the level signal connection status and the height of the high-tension connector
The working condition of pressure interlocking detection means.
In one preferred embodiment, the signal conditioning circuit is in the detection resistance no current, and output is special
Determine level signal；
The connection status of microprocessor high-tension connector according to the particular level signal determining is disconnection shape
State.
Another preferred embodiment in, the signal conditioning circuit in the detection resistance have square wave current
When, the alternation square wave pressure drop according to the detection resistance two ends exports square wave voltage signal；
The microprocessor judges that the connection status of the high-tension connector is conducting shape according to the square wave voltage signal
State.
Another preferred embodiment in, the signal conditioning circuit is in the high-voltage interlocking detection means failure
Output abnormality level signal；The abnormal level signal is the level letter in addition to particular level signal and square wave voltage signal
Number；
Microprocessor working condition of high-voltage interlocking detection means according to the abnormal level signal determining is
Abnormality.
Further, the signal conditioning circuit is differential amplifier circuit；The differential amplifier circuit include dc source,
First resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th
Resistance, the tenth resistance and operational amplifier；
One end of the first resistor is connected with one end of the high-tension connector, the other end difference of the first resistor
One end with the second resistance, the 3rd resistor, the 4th resistance and the 5th resistance is connected, the second resistance
Other end ground connection, the other end of the 3rd resistor is connected with the dc source, the other end of the 4th resistance and institute
State the normal phase input end connection of operational amplifier, the other end ground connection of the 5th resistance；
One end of 6th resistance is connected with one end of the signal generator, the other end difference of the 6th resistance
It is connected with the 7th resistance, the 8th resistance, the 9th resistance and the tenth resistance, the other end ground connection of the 7th resistance,
The other end of the 8th resistance is connected with the reverse input end of the operational amplifier, the 9th resistance, the tenth electricity
Output end of the other end of resistance respectively with the operational amplifier is connected；The output end of the operational amplifier and the microprocessor
The input connection of device.
Further, the differential amplifier circuit also include the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity and
5th electric capacity；
One end of first electric capacity connects the tie point of the first resistor and the second resistance, first electric capacity
The other end connect the tie point of the 6th resistance and the 7th resistance；One end of second electric capacity and the direct current
Source connects, and the other end of second electric capacity is connected with the normal phase input end of the operational amplifier；The one of 3rd electric capacity
End is connected with the normal phase input end of the operational amplifier, the other end ground connection of the 3rd electric capacity；The one of 4th electric capacity
End is connected with the inverting input of the operational amplifier, the other end of the 4th electric capacity and the output of the operational amplifier
End connection；5th electric capacity is in parallel with the 4th electric capacity.
Correspondingly, the embodiment of the present invention also provides a kind of high-voltage interlocking detection method, including：
S1, the generation square wave current inspection in the loop connected into by high-tension connector, signal generator and detection unit
Survey signal；The detection unit includes that the detection resistance being serially connected in the loop and input are connected respectively to detection resistance two
The signal conditioning circuit at end；
S2, the pressure drop for obtaining the detection resistance two ends, and according to the pressure drop outputs level signals；
S3, the connection status that the high-tension connector is judged according to the level signal and the high-voltage interlocking detection means
Working condition.
In one preferred embodiment, in the detection resistance no current, the step S2 exports particular level
Signal；
The step S3 is specifically included：
The connection status of high-tension connector according to the particular level signal determining is off-state.
Another preferred embodiment in, when there is square wave current in the detection resistance, step S2 tool
Body includes：
Alternation square wave pressure drop according to the detection resistance two ends, exports square wave voltage signal；
The step S3 is specifically included：
Judge that the connection status of the high-tension connector is conducting state according to the square wave voltage signal.
Another preferred embodiment in, in the high-voltage interlocking detection means failure, step S2 output
Level signal be abnormal level signal；The abnormal level signal is in addition to particular level signal and square wave voltage signal
Level signal；
The step S3 is specifically included：
The working condition that detection means is interlocked according to the abnormal level signal determining is abnormality.
Implement the embodiment of the present invention, have the advantages that：
High-voltage interlocking detection means provided in an embodiment of the present invention and method, can occur by high-tension connector, signal
Square wave current signal is produced in the loop that device and detection unit are constituted, the pressure drop at detection resistance two ends is obtained, and according to the pressure
The corresponding level signal of drop output, to detect the connection status of high-tension connector according to the level signal, judges high-voltage interlocking
Whether the break-make and high-voltage interlocking detection means of loop are abnormal, using square wave current signal, strengthen interference rejection capability, and improve
The precision of detection；Signal generator and detection unit are powered using two independent power supplys, can avoid influencing each other, and improve inspection
The reliability of survey.
Brief description of the drawings
Fig. 1 is the structural representation of the one embodiment for the high-voltage interlocking detection means that the present invention is provided；
Fig. 2 is the structural representation of another embodiment of the high-voltage interlocking detection means that the present invention is provided；
Fig. 3 is the schematic flow sheet of the one embodiment for the high-voltage interlocking detection method that the present invention is provided.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
The structural representation of the one embodiment for the high-voltage interlocking detection means provided referring to Fig. 1, the present invention, including micro- place
Reason device 1, and high-tension connector 2, signal generator I and the detection unit 3 for connecting into loop；The detection unit 3 includes string
The detection resistance R and input being connected in the loop are connected respectively to the signal conditioning circuit 31 at detection resistance R two ends；
The signal generator I is used for the square wave current detection signal produced in the loop；
The signal conditioning circuit 31 is used to obtain the pressure drop at the detection resistance two ends, and according to the pressure drop, output
Level signal；
The microprocessor 1 is used to judge according to the level signal connection status and the height of the high-tension connector
The working condition of pressure interlocking detection means.
It should be noted that signal generator, high-tension connector and detection unit constitute loop.Wherein, signal generator
Square wave current signal can be produced, the state of high-tension connector can characterize the connection status of high voltage component and high-pressure system, even high
Splenium part breaks from high-pressure system, then high-tension connector open circuit, otherwise then turns on.Detection unit has independent current source, if high
Pressure connector open circuit, the then square wave current signal that signal generator is produced cannot flow into detection unit, and detection unit is only according to its
Vertical power supply exports a kind of level signal to microprocessor；If high-tension connector is turned on, the square wave current that signal generator is produced
Signal flows into detection unit, and detection unit exports another level signal to micro- according to the square wave current signal and its independent current source
Processor.Therefore, microprocessor is the connection status that can detect that high-tension connector according to two kinds of different level signals.Separately
Outward, if the third level signal of detection unit output in addition to first two level signal makes microprocessor root to microprocessor
The abnormal operation of high-voltage detecting device is detected according to the third level signal.
Specifically, detection unit includes the two ends difference of the detection resistance of parallel connection and signal conditioning circuit, i.e. detection resistance
Connection high-tension connector and signal generator, two inputs of signal conditioning circuit connect high-tension connector and signal hair respectively
Raw device.Detection unit can be by the detection to detection resistance both end voltage, and it is mutual to judge high pressure to export corresponding level signal
The break-make on lock ring road.Signal conditioning circuit has independent current source, if high-tension connector is opened a way, the square wave that signal generator is produced
Current signal cannot flow into detection resistance, i.e. detection resistance no current and flow into, and two ends pressure drop is 0, and signal conditioning circuit is according to it
Independent current source exports a kind of level signal to microprocessor；If high-tension connector is turned on, the alternation side that signal generator is produced
Signal wave current flows into detection resistance, and periodically positive and negative pressure drop is formed in detection resistance, and signal conditioning circuit is to the cycle
Property positive and negative pressure drop carry out differential amplification treatment, and combine independent current source and export another level signal to microprocessor so that
Microprocessor is the connection status and high-voltage interlocking detection means that can detect that high-tension connector according to different level signals
Working condition.Microprocessor complete detection after, the connection status and the working condition of high-voltage interlocking detection means that will be detected
It is sent to VCU (Vehicle Control Unit, entire car controller).The embodiment of the present invention by the detection to square-wave signal,
May recognize that interlocking loop or interlock failure, it is to avoid error detection, improve the accuracy of detection, and, using current signal
Than there is stronger interference rejection capability using voltage pwm signal, while microprocessor only detects differential signal, maskable common mode
Interference, improves anti-interference.In addition, signal generating circuit and detection unit use two independent power supplys, reliability is high.
In being preferably carried out mode at one, the signal conditioning circuit is in the detection resistance no current, and output is special
Determine level signal；
The connection status of microprocessor high-tension connector according to the particular level signal determining is disconnection shape
State.
It should be noted that when any high voltage component breaks from high-pressure system, high-voltage interlocking loop open circuit, detection electricity
No current in resistance, two ends pressure drop is 0V.Signal conditioning circuit exports a DC voltage letter according to its independent dc source Vcc
Number, i.e., particular level (Vcc/2) arrives microprocessor.When microprocessor detects a particular level signal, judge that high pressure is mutual
Lock ring road is off, and system enters malfunction.
In another is preferably carried out mode, the signal conditioning circuit has square wave current in the detection resistance
When, the alternation square wave pressure drop according to the detection resistance two ends exports square wave voltage signal；
The microprocessor judges that the connection status of the high-tension connector is conducting shape according to the square wave voltage signal
State.
It should be noted that when all high voltage components are reliably connected in high-pressure system, the conducting of high-voltage interlocking loop, letter
The alternating rectangular current signal that number generator is produced forms periodically positive and negative pressure drop, i.e. alternation square wave pressure in detection resistance
Drop.Signal conditioning circuit is amplified treatment to the periodically positive and negative pressure drop, and combines its dc source output square-wave voltage
Signal is to microprocessor.When microprocessor detects square wave voltage signal, judge that high-voltage interlocking loop is in the conduction state, be
System connection is normal.
In another is preferably carried out mode, the signal conditioning circuit is in the high-voltage interlocking detection means failure
Output abnormality level signal；The abnormal level signal is the level letter in addition to particular level signal and square wave voltage signal
Number；
Microprocessor working condition of high-voltage interlocking detection means according to the abnormal level signal determining is
Abnormality.
It should be noted that when high-voltage interlocking detection means such as is short-circuited, opens a way at the failure, signal conditioning circuit is exported not
Other level signals including particular level signal and square wave voltage signal, i.e. abnormal level signal.Microprocessor is being detected
The abnormal level signal is that can determine that high-voltage interlocking detection means exception.
Preferably, as shown in Fig. 2 the signal conditioning circuit can be differential amplifier circuit.Wherein, the differential amplification
Circuit includes dc source Vcc, first resistor R11, second resistance R21,3rd resistor R31, the 4th resistance R41, the 5th resistance
R32, the 6th resistance R12, the 7th resistance R22, the 8th resistance R42, the 9th resistance R33, the tenth resistance R34 and operational amplifier
AMP1；
One end of the first resistor R11 is connected with one end of the high-tension connector 2, and the first resistor R11's is another
One end respectively with the second resistance R21, the 3rd resistor R31, the 4th resistance R41 and the 5th resistance R32
One end connection, the other end ground connection of the second resistance R21, the other end of the 3rd resistor R31 and the dc source Vcc
Connection, the other end of the 4th resistance R41 is connected with the normal phase input end of the operational amplifier A MP1, the 5th resistance
The other end ground connection of R32；
One end of the 6th resistance R12 is connected with one end of the signal generator U, and the 6th resistance R12's is another
One end is connected with the 7th resistance R22, the 8th resistance R42, the 9th resistance R33 and the tenth resistance R34 respectively, and described
The other end ground connection of seven resistance R22, the other end of the 8th resistance R42 and the reverse input end of the operational amplifier A MP1
Connection, the 9th resistance R33, the tenth resistance R34 the other end respectively with the output end of the operational amplifier A MP1
Connection；The output end of the operational amplifier A MP1 is connected with the input of the microprocessor 1.
It should be noted that the dc source of differential amplifier circuit independence is Vcc, first resistor R11 and the 6th resistance R12
Using the resistance of similar resistance, second resistance R21 and the 7th resistance R22 using similar resistance resistance, 3rd resistor R31, the
Five resistance R32, the 9th resistance R33 and the tenth resistance R34 use the resistance of similar resistance, the 4th resistance R41 and the 8th resistance R42
Using the resistance of similar resistance.
When no current passes through in detection resistance, the differential signal of differential amplifier circuit output intermediate level Vcc/2 is to micro-
Processor, when microprocessor detects the Vcc/2 voltages of stabilization, you can judge that high-voltage interlocking loop is off, be
System enters malfunction.As formation pressure drop u in detection resistanceRWhen, differential amplifier circuit output voltage is Uo=Vcc/2+uR*R3/
The square wave voltage signal of (2R1), wherein, when forward current is flowed through in detection resistance, Uo is more than Vcc/2, when in detection resistance
When flowing through negative current, Uo is less than Vcc/2.When microprocessor detects square wave voltage signal, you can judge high-voltage interlocking ring
Road is in the conduction state, and system connection is normal.When microprocessor detection differential amplifier circuit output is in addition to Vcc/2 and Uo
During abnormal level signal, such as 0V or Vcc level of stabilization, illustrate that high-voltage interlocking detection means has short circuit or open circuit etc. in itself
Failure, needs also exist for reporting VCU and is overhauled.
Further, the differential amplifier circuit also includes the first electric capacity C1, the second electric capacity C21, the 3rd electric capacity C22, the
Four electric capacity C24 and the 5th electric capacity C25；
One end of the first electric capacity C1 connects the tie point of the first resistor R11 and second resistance R21, described
The other end of the first electric capacity C1 connects the tie point of the 6th resistance R12 and the 7th resistance R22；Second electric capacity
One end of C21 is connected with the dc source+5V, and the other end of the second electric capacity C21 is with the operational amplifier A MP1's
Normal phase input end is connected；One end of the 3rd electric capacity C22 is connected with the normal phase input end of the operational amplifier A MP1, described
The other end ground connection of the 3rd electric capacity C22；One end of 4th electric capacity connects with the inverting input of the operational amplifier A MP1
Connect, the other end of the 4th electric capacity C24 is connected with the output end of the operational amplifier A MP1；The 5th electric capacity C25 with
The 4th electric capacity C24 is in parallel.
It should be noted that the second electric capacity C21, the 3rd electric capacity C22, the 4th electric capacity C24 and the 5th electric capacity C25 are using identical
Electric capacity.The first electric capacity C1, the second electric capacity C21, the 3rd electric capacity C22, the electricity of the 4th electric capacity C24 and the 5th can be added in detection unit
Hold the passive filtering elements such as C25, to filter high frequency and interference.In actual applications, differential amplifier circuit can be according to filtering needs
Appropriate increase and decrease filter element.
High-voltage interlocking detection means provided in an embodiment of the present invention, can be by high-tension connector, signal generator and inspection
Survey in the loop that unit is constituted and produce square wave current signal, obtain the pressure drop at detection resistance two ends, and export according to the pressure drop
Corresponding level signal, to detect the connection status of high-tension connector according to the level signal, judges high-voltage interlocking loop
Whether break-make and high-voltage interlocking detection means are abnormal in itself, using square wave current signal, strengthen interference rejection capability, and improve inspection
The precision of survey；Signal generator and detection unit are powered using two independent power supplys, can avoid influencing each other, and improve detection
Reliability.
Accordingly, the present invention also provides a kind of high-voltage interlocking detection method, can be applied to the high pressure in above-described embodiment
In interlocking detection means.
It is the schematic flow sheet of the one embodiment for the high-voltage interlocking detection method that the present invention is provided referring to Fig. 3, including：
S1, the generation square wave current inspection in the loop connected into by high-tension connector, signal generator and detection unit
Survey signal；The detection unit includes that the detection resistance being serially connected in the loop and input are connected respectively to detection resistance two
The signal conditioning circuit at end；
S2, the pressure drop for obtaining the detection resistance two ends, and according to the pressure drop outputs level signals；
S3, the connection status that the high-tension connector is judged according to the level signal and the high-voltage interlocking detection means
Working condition.
In being preferably carried out mode at one, in the detection resistance no current, the step S2 exports particular level
Signal；
The step S3 is specifically included：
The connection status of high-tension connector according to the particular level signal determining is off-state.
In another is preferably carried out mode, when there is square wave current in the detection resistance, the step S2 tools
Body includes：
Alternation square wave pressure drop according to the detection resistance two ends, exports square wave voltage signal；
The step S3 is specifically included：
Judge that the connection status of the high-tension connector is conducting state according to the square wave voltage signal.
In another is preferably carried out mode, in the high-voltage interlocking detection means failure, the step S2 outputs
Level signal be abnormal level signal；The abnormal level signal is in addition to particular level signal and square wave voltage signal
Level signal；
The step S3 is specifically included：
The working condition that detection means is interlocked according to the abnormal level signal determining is abnormality.
High-voltage interlocking detection method provided in an embodiment of the present invention, can be by high-tension connector, signal generator and inspection
Survey in the loop that unit is constituted and produce square wave current signal, obtain the pressure drop at detection resistance two ends, and export according to the pressure drop
Corresponding level signal, to detect the connection status of high-tension connector according to the level signal, judges high-voltage interlocking loop
Whether break-make and high-voltage interlocking detection means are abnormal in itself, using square wave current signal, strengthen interference rejection capability, and improve inspection
The precision of survey；Signal generator and detection unit are powered using two independent power supplys, can avoid influencing each other, and improve detection
Reliability.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (10)
1. a kind of high-voltage interlocking detection means, it is characterised in that including microprocessor, and connect into the high pressure connection in loop
Device, signal generator and detection unit；The detection unit includes the detection resistance and input point that are serially connected in the loop
The signal conditioning circuit at the detection resistance two ends is not connected to；
The signal generator is used to produce square wave current signal in the loop；
The signal conditioning circuit is used to obtain the pressure drop at the detection resistance two ends, and is believed according to the pressure drop output level
Number；
The microprocessor is used to judge that the connection status and the high pressure of the high-tension connector are mutual according to the level signal
Lock the working condition of detection means.
2. high-voltage interlocking detection means as claimed in claim 1, it is characterised in that the signal conditioning circuit is in the detection
During resistance no current, particular level signal is exported；
The connection status of microprocessor high-tension connector according to the particular level signal determining is off-state.
3. high-voltage interlocking detection means as claimed in claim 1, it is characterised in that the signal conditioning circuit is in the detection
When having square wave current in resistance, the alternation square wave pressure drop according to the detection resistance two ends exports square wave voltage signal；
The microprocessor judges that the connection status of the high-tension connector is conducting state according to the square wave voltage signal.
4. high-voltage interlocking detection means as claimed in claim 1, it is characterised in that the signal conditioning circuit is in the high pressure
Output abnormality level signal during interlocking detection means failure；The abnormal level signal is except particular level signal and square-wave voltage
Level signal beyond signal；
The working condition of microprocessor high-voltage interlocking detection means according to the abnormal level signal determining is abnormal
State.
5. the high-voltage interlocking detection means as described in any one of Claims 1-4, it is characterised in that the signal conditioning circuit
It is differential amplifier circuit；The differential amplifier circuit includes dc source, first resistor, second resistance, 3rd resistor, the 4th electricity
Resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance and operational amplifier；
One end of the first resistor is connected with one end of the high-tension connector, the other end of the first resistor respectively with institute
State second resistance, the 3rd resistor, the 4th resistance and the 5th resistance one end connection, the second resistance it is another
One end is grounded, and the other end of the 3rd resistor is connected with the dc source, the other end and the fortune of the 4th resistance
Calculate the normal phase input end connection of amplifier, the other end ground connection of the 5th resistance；
One end of 6th resistance is connected with one end of the signal generator, the other end of the 6th resistance respectively with institute
The connection of the 7th resistance, the 8th resistance, the 9th resistance and the tenth resistance is stated, the other end ground connection of the 7th resistance is described
The other end of the 8th resistance is connected with the reverse input end of the operational amplifier, the 9th resistance, the tenth resistance
Output end of the other end respectively with the operational amplifier is connected；The output end of the operational amplifier and the microprocessor
Input is connected.
6. high-voltage interlocking detection means as claimed in claim 5, it is characterised in that the differential amplifier circuit also includes first
Electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity and the 5th electric capacity；
One end of first electric capacity connects the tie point of the first resistor and the second resistance, first electric capacity it is another
One end connects the tie point of the 6th resistance and the 7th resistance；One end of second electric capacity connects with the dc source
Connect, the other end of second electric capacity is connected with the normal phase input end of the operational amplifier；One end of 3rd electric capacity with
The normal phase input end connection of the operational amplifier, the other end ground connection of the 3rd electric capacity；One end of 4th electric capacity with
The inverting input connection of the operational amplifier, the other end of the 4th electric capacity connects with the output end of the operational amplifier
Connect；5th electric capacity is in parallel with the 4th electric capacity.
7. a kind of high-voltage interlocking detection method, it is characterised in that including：
S1, in the loop connected into by high-tension connector, signal generator and detection unit produce square wave current signal；Institute
Stating detection unit includes that the detection resistance being serially connected in the loop and input are connected respectively to the detection resistance two ends
Signal conditioning circuit；
S2, the pressure drop for obtaining the detection resistance two ends, and according to the pressure drop outputs level signals；
The work of S3, the connection status that the high-tension connector is judged according to the level signal and the high-voltage interlocking detection means
Make state.
8. high-voltage interlocking detection method as claimed in claim 7, it is characterised in that in the detection resistance no current, institute
State step S2 output particular level signals；
The step S3 is specifically included：
The connection status of high-tension connector according to the particular level signal determining is off-state.
9. high-voltage interlocking detection method as claimed in claim 7, it is characterised in that there is square wave electricity in the detection resistance
During stream, the step S2 is specifically included：
Alternation square wave pressure drop according to the detection resistance two ends, exports square wave voltage signal；
The step S3 is specifically included：
Judge that the connection status of the high-tension connector is conducting state according to the square wave voltage signal.
10. high-voltage interlocking detection method as claimed in claim 7, it is characterised in that in the high-voltage interlocking detection means therefore
During barrier, the level signal of the step S2 outputs is abnormal level signal；The abnormal level signal is except particular level signal
With the level signal beyond square wave voltage signal；
The step S3 is specifically included：
The working condition that detection means is interlocked according to the abnormal level signal determining is abnormality.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387809A (en) * | 2018-02-26 | 2018-08-10 | 北京海博思创科技有限公司 | High-voltage interlocking detection circuit and high-voltage interlocking detection method |
| CN109541494A (en) * | 2019-01-08 | 2019-03-29 | 常州索维尔电子科技有限公司 | Power battery high-voltage interlocking detection circuit and method |
| CN110014837A (en) * | 2018-01-09 | 2019-07-16 | 上海海拉电子有限公司 | High-voltage interlocking detection device and electric vehicle with the high-voltage interlocking detection device |
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| CN110058180A (en) * | 2019-04-04 | 2019-07-26 | 上海捷新动力电池系统有限公司 | A kind of power battery pack system high pressure interlocking connector detection system |
| CN110531249A (en) * | 2019-08-28 | 2019-12-03 | 宝能汽车有限公司 | A kind of high-voltage interlocking detection circuit and fault detection method |
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