CN109324596A - A kind of electric machine controller high-voltage interlocking detection circuit and detection method - Google Patents
A kind of electric machine controller high-voltage interlocking detection circuit and detection method Download PDFInfo
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- CN109324596A CN109324596A CN201811099463.2A CN201811099463A CN109324596A CN 109324596 A CN109324596 A CN 109324596A CN 201811099463 A CN201811099463 A CN 201811099463A CN 109324596 A CN109324596 A CN 109324596A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
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Abstract
The invention discloses a kind of electric machine controller high-voltage interlocking detection circuit and detection methods, pwm signal is issued by BMS, after the high pressure of PTC and A/C takes electrical connector, into the detection circuit of MCU control panel, then the pwm signal is performed corresponding processing and is isolated, while inlet increases EMC treatment measures.MCU judges whether the signal is normal, and the HVIL signal for then reporting VCU to detect if normal is normal；If the abnormal signal, compared with the HVIL signal of BMS back production, BMS also reports HVIL to interrupt, then the high pressure of PTC or A/C takes electrical connector connection abnormal, if but BMS detection it is normal, MCU wrong report is interrupted, and there are failures for detection circuit；The present invention is based on the angles of components controller, and VCU and BMS is cooperated to take electrical connector connection status real-time monitoring to the high pressure of PTC and A/C；Whether increase, can normal with accurate judgement HVIL loop by the detection of back production and MCU to HVIL signal, and the specific location of abnormal high pressure connector can be positioned in the environment of vehicle.
Description
Technical field
The present invention relates to electric car field, in particular to a kind of electric machine controller high-voltage interlocking detection circuit and detection side
Method.
Background technique
With the fast development of China's new energy hybrid vehicle, electrical structure and principle of dynamics are different from conventional fuel oil
Automobile and pure electric automobile, the security performance of hybrid vehicle also increasingly attract extensive attention.It is moved at present to ensure to mix
The high-pressure system safety of power automobile, is mainly achieved in that through electrical low-voltage signal and detects the electrical complete of vehicle high tension loop
Whole property, when abnormal, the output of the timely cutoff high of vehicle occurs in high tension loop, to guarantee safety of person vehicle, i.e., using high-voltage interlocking
The security of system in high tension loop is detected in circuit (HVIL, High Voltage Interlock Loop).
In existing technology, the detection mode of usual high-voltage interlocking is to set high-voltage interlocking signal to switching value, will
The shortcomings that each high voltage parts (such as A/C, PTC, OBC) form measure loop by concatenated mode, such scheme is nothing
Method identifies HVIL signal in high tension loop, can not precise positioning to specific components.Each components pass through detection low and high level
Variation, whether to judge and report HVIL normal, vehicle can not independently judge whether entire circuit is normal.
Patent document 1(publication number: CN106585384 A) a kind of electric automobile high-voltage interlocking realization device is disclosed, often
A high-tension apparatus node includes high-voltage connector, high-voltage interlocking signal detection circuit, high-voltage equipment controller ECU, and high pressure patches
Part can patch high-tension apparatus, and high-voltage connector output connects high-voltage interlocking signal detection circuit, and high-voltage interlocking signal detection circuit is defeated
High-voltage equipment controller ECU is met out；Air conditioner compressed machine controller ECU, electric heater controller ECU, power battery controller ECU
Pass through CAN network respectively with electric machine controller ECU and is connected to power-supply management system controller BMS, power-supply management system controller
BMS is connected to entire car controller VMS by CAN network, and entire car controller VMS is connected to each high pressure by CAN network
Device controller ECU.Following functions may be implemented in this patent scheme:
(1) node on high-voltage interlocking circuit is easy extension；
(2) specific high-voltage interlocking loop fault can be navigated to；
(3) it when HVIL interruption occurs in certain node, can individually take measures to it without the normal function for interfering other nodes；
The patent is the angle with vehicle, and each high voltage parts are detected for respective high-voltage connector, then VCU and
BMS acquires the fault message that each high voltage parts report by CAN network, realizes the monitoring of HVIL.Although can accurately determine
The abort situation of position HVIL, but higher cost.
Summary of the invention
Object of the present invention is to: a kind of electric machine controller high-voltage interlocking detection circuit and detection method are provided, with components electricity
Machine controller angular compliance vehicle carries out HVIL detection, improves the security performance of vehicle.
The technical scheme is that
A kind of electric machine controller high-voltage interlocking detection circuit, including sequentially connected voltage comparator U1 and isolation optocoupler U2, institute
The PWM type HVIL signal that voltage comparator U1 inverting input terminal connection BMS is issued is stated, non-inverting input terminal connects reference voltage；Electricity
Pressure comparator U1 output end is pulled up by main power source through resistance R3, while 1 pin of isolation optocoupler U2 is connect through resistance R6；Isolation optocoupler
4 pins of U2 are pulled up from power supply through resistance R4, detect signal as MCU.
Preferably, it is connected between 1 and 2 pins of the isolation optocoupler U2 and connects capacitor C3 between the pin of capacitor C2,3 and 4；
2 pins of isolation optocoupler U2 are with reference to ground GND1, and the connection of 3 pins is with reference to ground GND2.
Preferably, the PWM type HVIL signal that the BMS is issued is defeated through π type filter circuit connection voltage comparator U1 reverse phase
Enter end.
A kind of electric machine controller high-voltage interlocking detection method, comprising:
S1, BMS issue PWM type HVIL signal, after the high pressure of PTC and A/C takes electrical connector, into the height of MCU control panel
Press interlock detection circuit；
HVIL signal is compared processing and isolation by S2, high-voltage interlocking detection circuit, is input to MCU；
S3, MCU judge whether input signal is normal, and the HVIL signal for then reporting VCU to detect if normal is normal；
If S4, input signal are abnormal, compared with VCU is to the HVIL signal of BMS back production: if in the HVIL signal that BMS reports VCU
Disconnected, then the high pressure of PTC or A/C takes electrical connector connection abnormal；If BMS detection is normal, MCU wrong report is interrupted, and detection circuit is deposited
In failure.
Preferably, the voltage 5V of the PWM type HVIL signal, frequency 100Hz, duty ratio 50%.
The invention has the advantages that
1, the present invention is based on the angles of components controller, and VCU is cooperated to take electrical connector to connect with the high pressure of A/C PTC with BMS
Status real time monitor；
2, whether the present invention increases to the back production of HVIL signal and the detection of MCU, can normal with accurate judgement HVIL loop, and
The specific location of abnormal high pressure connector can be positioned in the environment of vehicle；
3, the present invention increases the detection reliability of HVIL system by the pwm signal detection of setting；
4, HVIL signal is filtered by detection circuit of the present invention, voltage is converted and signal isolation, increases the anti-interference of circuit
Property.
Detailed description of the invention
The invention will be further described with reference to the accompanying drawings and embodiments:
Fig. 1 is the schematic diagram of electric machine controller high-voltage interlocking detection circuit of the invention；
Fig. 2 is the flow chart of electric machine controller high-voltage interlocking detection method of the invention.
Specific embodiment
The present invention proposes a kind of electric machine controller high-voltage interlocking detection circuit, can be with real-time detection motor control using the program
The state in the high-voltage interlocking circuit on device processed, while can be with real-time report entire car controller, principle is as shown in Figure 1.
In Fig. 1, PWM type high-voltage interlocking signal passes through π type filter circuit (being made of C5, R5, C6), connection comparator U1's
Inverting input terminal, main power source are divided by resistance R1 and R2, obtain reference voltage, connect the non-inverting input terminal of comparator U1, than
It is OC compared with device output, is pulled up by main power source through resistance R3.The output end of comparator connects 1 pipe of isolation optocoupler U2 through resistance R6
1 and 2 pins of foot, capacitor C2 connection isolation optocoupler U2 are inputted as primary side.4 pins on isolation optocoupler pair side by from power supply through electricity
R4 pull-up is hindered, detects signal as MCU, the reference ground of 3 and 4 pins of C3 connection isolation optocoupler, isolation optocoupler primary side is GND1,
It is secondary side reference GND2.HVIL signal is filtered by detection circuit of the present invention, voltage is converted and signal isolation, increases electricity
The anti-interference on road.
As shown in Fig. 2, being the flow chart of electric machine controller high-voltage interlocking detection method of the invention, controlled in the detection method
Device cooperation vehicle VCU and BMS processed carry out high-voltage interlocking signal detection.It is specific:
S1, BMS issue the PWM type HVIL signal of 5V, 100Hz, duty ratio 50%, take electrical connector by the high pressure of PTC and A/C
Afterwards, into the high-voltage interlocking detection circuit of MCU control panel；
HVIL signal is compared processing and isolation by S2, high-voltage interlocking detection circuit, is input to MCU, while inlet increases
EMC treatment measures；
S3, MCU judge whether input signal is normal, and the HVIL signal for then reporting VCU to detect if normal is normal；
If S4, input signal are abnormal, compared with VCU is to the HVIL signal of BMS back production: if in the HVIL signal that BMS reports VCU
Disconnected, then the high pressure of PTC or A/C takes electrical connector connection abnormal；If BMS detection is normal, MCU wrong report is interrupted, and detection circuit is deposited
In failure.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
It cans understand the content of the present invention and implement it accordingly, it is not intended to limit the scope of the present invention.It is all to lead according to the present invention
The modification for wanting the Spirit Essence of technical solution to be done, should be covered by the protection scope of the present invention.
Claims (5)
1. a kind of electric machine controller high-voltage interlocking detection circuit, it is characterised in that: including sequentially connected voltage comparator U1 and
Isolation optocoupler U2, the PWM type HVIL signal that the voltage comparator U1 inverting input terminal connection BMS is issued, non-inverting input terminal connect
Connect reference voltage；Voltage comparator U1 output end is pulled up by main power source through resistance R3, while connecing the 1 of isolation optocoupler U2 through resistance R6
Pin；4 pins of isolation optocoupler U2 are pulled up from power supply through resistance R4, detect signal as MCU.
2. electric machine controller high-voltage interlocking detection circuit according to claim 1, which is characterized in that the isolation optocoupler U2
1 and 2 pins between connect the pin of capacitor C2,3 and 4 between connect capacitor C3；2 pins of isolation optocoupler U2 are with reference to ground GND1, and 3
Pin connection is with reference to ground GND2.
3. electric machine controller high-voltage interlocking detection circuit according to claim 2, which is characterized in that the BMS was issued
PWM type HVIL signal connects voltage comparator U1 inverting input terminal through π type filter circuit.
4. a kind of electric machine controller high-voltage interlocking detection method characterized by comprising
S1, BMS issue PWM type HVIL signal, after the high pressure of PTC and A/C takes electrical connector, into the height of MCU control panel
Press interlock detection circuit；
HVIL signal is compared processing and isolation by S2, high-voltage interlocking detection circuit, is input to MCU；
S3, MCU judge whether input signal is normal, and the HVIL signal for then reporting VCU to detect if normal is normal；
If S4, input signal are abnormal, compared with VCU is to the HVIL signal of BMS back production: if in the HVIL signal that BMS reports VCU
Disconnected, then the high pressure of PTC or A/C takes electrical connector connection abnormal；If BMS detection is normal, MCU wrong report is interrupted, and detection circuit is deposited
In failure.
5. electric machine controller high-voltage interlocking detection method according to claim 4, which is characterized in that the PWM type HVIL
The voltage 5V of signal, frequency 100Hz, duty ratio 50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811099463.2A CN109324596A (en) | 2018-09-20 | 2018-09-20 | A kind of electric machine controller high-voltage interlocking detection circuit and detection method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811099463.2A CN109324596A (en) | 2018-09-20 | 2018-09-20 | A kind of electric machine controller high-voltage interlocking detection circuit and detection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110014839A (en) * | 2019-04-09 | 2019-07-16 | 山东交通职业学院 | A kind of electric automobile high-voltage interlock detection circuit |
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| CN106585384A (en) * | 2015-10-20 | 2017-04-26 | 上海汽车集团股份有限公司 | High-pressure interlocking implementation device for electric car |
| CN108437799A (en) * | 2018-02-10 | 2018-08-24 | 山东国金汽车制造有限公司 | A kind of interlocking diagnostic system of loop |
| CN108482127A (en) * | 2018-03-31 | 2018-09-04 | 山东交通职业学院 | A kind of electric automobile high-voltage interlocking loop and breaking localization method |
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2018
- 2018-09-20 CN CN201811099463.2A patent/CN109324596A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101294066B1 (en) * | 2011-09-01 | 2013-08-07 | 기아자동차주식회사 | Method of safety control for oil pump controller |
| CN105150854A (en) * | 2015-09-08 | 2015-12-16 | 莆田市云驰新能源汽车研究院有限公司 | High-voltage safe protecting system for electric vehicle |
| CN105313700A (en) * | 2015-09-29 | 2016-02-10 | 重庆长安汽车股份有限公司 | A high voltage interlocking circuit of new energy vehicles and a fault diagnosis method |
| CN106585384A (en) * | 2015-10-20 | 2017-04-26 | 上海汽车集团股份有限公司 | High-pressure interlocking implementation device for electric car |
| CN108437799A (en) * | 2018-02-10 | 2018-08-24 | 山东国金汽车制造有限公司 | A kind of interlocking diagnostic system of loop |
| CN108482127A (en) * | 2018-03-31 | 2018-09-04 | 山东交通职业学院 | A kind of electric automobile high-voltage interlocking loop and breaking localization method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110014839A (en) * | 2019-04-09 | 2019-07-16 | 山东交通职业学院 | A kind of electric automobile high-voltage interlock detection circuit |
| CN110014839B (en) * | 2019-04-09 | 2020-12-01 | 山东交通职业学院 | High-voltage interlocking detection circuit for electric automobile |
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Application publication date: 20190212 |
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