CN207488457U - A kind of high-voltage DC contactor break-make detecting system - Google Patents
A kind of high-voltage DC contactor break-make detecting system Download PDFInfo
- Publication number
- CN207488457U CN207488457U CN201721552466.8U CN201721552466U CN207488457U CN 207488457 U CN207488457 U CN 207488457U CN 201721552466 U CN201721552466 U CN 201721552466U CN 207488457 U CN207488457 U CN 207488457U
- Authority
- CN
- China
- Prior art keywords
- voltage
- signal
- contactor
- capacitance
- controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model provides a kind of high-voltage DC contactor break-make detecting system, including controller, signal coupled capacitor and signal demodulator capacitance, the signal output end of the controller is connect with one end of the signal coupled capacitor, the other end of the signal coupled capacitor and the input terminal of high-voltage DC contactor connect, the output terminal of the high-voltage DC contactor is connect with one end of the signal demodulator capacitance, and the other end of the signal demodulator capacitance is connect with the signal detection end of the controller.High-voltage DC contactor break-make detecting system testing result provided by the utility model is accurate, and detection speed is quick, at low cost, improves the stability and reliability of system detectio.
Description
Technical field
The utility model is related to circuit detection technique field, more particularly to a kind of high-voltage DC contactor break-make detection system
System.
Background technology
In the battery management system of New-energy electric vehicle, it usually needs multiple high-voltage DC contactors complete difference
System switching task.The operating voltage of high-voltage DC contactor is larger, use environment is severe, frequent operation when, easily send out
Raw failure, and then cause safety accident.Therefore on New-energy electric vehicle, the on off operating mode to high-voltage DC contactor is needed
It is detected, needs to detect stable operation that is accurate, and then ensureing vehicle in security control.
The main method that the existing on off operating mode to high-voltage DC contactor is detected is detection high voltage direct current contact
The voltage at device both ends, according to the range of pressure difference, to judge its on off operating mode, testing conditions are required for closed high circuit, and
And cost is higher, exist detection it is inaccurate,.The shortcomings of unstable.The patent document of publication number CN202794463U, provides
A kind of detection device of high-voltage DC contactor main contacts failure is, it can be achieved that judge whether D.C. contactor main contacts sticks together
Or the stuck failure of machinery；But it is mainly by detecting the voltage at D.C. contactor coil both ends, then detect auxiliary contact both ends
Voltage, to judge its state, need closed high circuit, and cost is higher, there is also detection it is inaccurate the shortcomings that.
Utility model content
In view of the above problems, the utility model patent purpose is to devise a kind of high-voltage DC contactor break-make detection system
System, testing result is accurate, and detection speed is quick, at low cost, improves the stability and reliability of system detectio.
To achieve the above object, the utility model provides a kind of high-voltage DC contactor break-make detecting system, including control
Device U1 processed, signal coupled capacitor C1 and signal demodulator capacitance C2, the signal output end of the controller U1 are coupled with the signal
One end connection of capacitance C1, the other end of the signal coupled capacitor C1 are connect with the input terminal of high-voltage DC contactor KM, institute
The output terminal for stating high-voltage DC contactor KM is connect with one end of the signal demodulator capacitance C2, the signal demodulator capacitance C2's
The other end is connect with the signal detection end of the controller U1；
The controller U1 is used to send the high-frequency signal of certain frequency by its signal output end, and passes through the signal
Coupled capacitor C1 is coupled to the input terminal of high-voltage DC contactor KM；The signal demodulator capacitance C2 is in high-voltage DC contactor KM
Output terminal high-frequency signal is decoupled out, and be sent into the signal detection end of the controller U1；The controller U1 is to sending
The on off operating mode of the high-voltage DC contactor KM is compared and judged with the high-frequency signal received.
Specifically, the chip model of controller U1 described in the utility model is CPLD XC9572.
Specifically, signal coupled capacitor C1 described in the utility model and signal demodulator capacitance C2 are high pressure resistant capacitance.
Specifically, controller U1 described in the utility model is compared the high-frequency signal sent and received, if sending
With the frequency approximately equal of the high-frequency signal of reception, then judge that the contact of the high-voltage DC contactor KM has been closed；It is on the contrary then
Judge the contact of the high-voltage DC contactor KM to disconnect.
High-voltage DC contactor break-make detecting system provided by the utility model compared with prior art, using coupled signal
Detect the on off operating mode of high-voltage DC contactor to high tension loop mode, this mode have testing result it is accurate, it is quick, into
This is low, improves the stability and reliability of system detectio, there is higher value to the security control of new energy electric motor vehicle.
Description of the drawings
The utility model embodiment is described further referring to the drawings, wherein：
Fig. 1 is a kind of system pie graph of high-voltage DC contactor break-make detecting system of the utility model；
Fig. 2 is a kind of circuit diagram of high-voltage DC contactor break-make detecting system of the utility model.
Specific embodiment
The utility model is described in further detail in the following with reference to the drawings and specific embodiments.
The utility model proposes a kind of high-voltage DC contactor break-make detecting systems, please refer to Fig.1-Fig. 2, including control
Device U1, signal coupled capacitor C1 and signal demodulator capacitance C2, the signal output end of the controller U1 couple electricity with the signal
Hold one end connection of C1, the other end of the signal coupled capacitor C1 is connect with the input terminal of high-voltage DC contactor KM, described
The output terminal of high-voltage DC contactor KM is connect with one end of the signal demodulator capacitance C2, and the signal demodulator capacitance C2's is another
One end is connect with the signal detection end of the controller U1.
The controller U1 is used to send the high-frequency signal of certain frequency by its signal output end, and passes through the signal
Coupled capacitor C1 is coupled to the input terminal of high-voltage DC contactor KM；The signal demodulator capacitance C2 is in high-voltage DC contactor KM
Output terminal high-frequency signal is decoupled out, and be sent into the signal detection end of the controller U1；The controller U1 is to sending
The on off operating mode of the high-voltage DC contactor KM is compared and judged with the high-frequency signal received.If it sends and receives
The frequency approximately equal of high-frequency signal then judges that the contact of the high-voltage DC contactor KM has been closed；Described on the contrary then judgement
The contact of high-voltage DC contactor KM is disconnects.
Specifically, referring to Fig. 2, the chip model of controller U1 described in the present embodiment is CPLD XC9572.The letter
Number coupled capacitor C1 and signal demodulator capacitance C2 is high pressure resistant capacitance.One end of signal coupled capacitor C1 is pushed back with detected height
Road primary side connection, the other end are connect with the signal output end SignalOut of controller U1；One end of signal demodulator capacitance C2 and quilt
The high tension loop secondary side connection of detection, the other end are connect with the signal input part SignalIn of controller U1, StatusOut pins
For testing result output terminal, low level represents that being detected circuit disconnects or do not detect, and high level represents to be detected circuit closed.
Specific embodiment of the present utility model described above does not form the restriction to scope of protection of the utility model.
The various other corresponding changes and deformation that any technical concept according to the present utility model is made, should be included in this practicality
In novel scope of the claims.
Claims (4)
1. a kind of high-voltage DC contactor break-make detecting system, which is characterized in that including controller U1, signal coupled capacitor C1 and
Signal demodulator capacitance C2, the signal output end of the controller U1 are connect with one end of the signal coupled capacitor C1, the letter
The other end of number coupled capacitor C1 is connect with the input terminal of high-voltage DC contactor KM, the output of the high-voltage DC contactor KM
End is connect with one end of the signal demodulator capacitance C2, the other end of the signal demodulator capacitance C2 and the letter of the controller U1
The connection of number test side；
The controller U1 is used to send the high-frequency signal of certain frequency by its signal output end, and passes through the signal and couple
Capacitance C1 is coupled to the input terminal of high-voltage DC contactor KM；The signal demodulator capacitance C2 is in the defeated of high-voltage DC contactor KM
High-frequency signal is decoupled out by outlet, and is sent into the signal detection end of the controller U1；The controller U1 is to sending and connecing
The high-frequency signal received is compared and judges the on off operating mode of the high-voltage DC contactor KM.
A kind of 2. high-voltage DC contactor break-make detecting system according to claim 1, which is characterized in that the controller
The chip model of U1 is CPLD XC9572.
A kind of 3. high-voltage DC contactor break-make detecting system according to claim 1, which is characterized in that the signal coupling
It is all high pressure resistant capacitance to close capacitance C1 and signal demodulator capacitance C2.
A kind of 4. high-voltage DC contactor break-make detecting system according to claim 1, which is characterized in that the controller
U1 is compared the high-frequency signal sent and received, if the frequency approximately equal of the high-frequency signal sent and received, sentences
The contact of the disconnected high-voltage DC contactor KM has been closed；Contact that is on the contrary then judging the high-voltage DC contactor KM is disconnected
It opens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721552466.8U CN207488457U (en) | 2017-11-20 | 2017-11-20 | A kind of high-voltage DC contactor break-make detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721552466.8U CN207488457U (en) | 2017-11-20 | 2017-11-20 | A kind of high-voltage DC contactor break-make detecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207488457U true CN207488457U (en) | 2018-06-12 |
Family
ID=62474319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721552466.8U Active CN207488457U (en) | 2017-11-20 | 2017-11-20 | A kind of high-voltage DC contactor break-make detecting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207488457U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111913132A (en) * | 2020-06-22 | 2020-11-10 | 南京康尼电子科技有限公司 | Loop on-off state detection device and method |
| CN112904115A (en) * | 2021-01-20 | 2021-06-04 | 成都可为科技股份有限公司 | Pressing plate state monitoring circuit and monitoring method |
| CN114217220A (en) * | 2022-02-23 | 2022-03-22 | 深圳市德兰明海科技有限公司 | Switch detection circuit and method and switch detector |
-
2017
- 2017-11-20 CN CN201721552466.8U patent/CN207488457U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111913132A (en) * | 2020-06-22 | 2020-11-10 | 南京康尼电子科技有限公司 | Loop on-off state detection device and method |
| CN112904115A (en) * | 2021-01-20 | 2021-06-04 | 成都可为科技股份有限公司 | Pressing plate state monitoring circuit and monitoring method |
| CN112904115B (en) * | 2021-01-20 | 2022-11-29 | 成都可为科技股份有限公司 | Pressing plate state monitoring circuit and monitoring method |
| CN114217220A (en) * | 2022-02-23 | 2022-03-22 | 深圳市德兰明海科技有限公司 | Switch detection circuit and method and switch detector |
| EP4235196A1 (en) * | 2022-02-23 | 2023-08-30 | Shenzhen Poweroak Newener Co., Ltd | Switch detection circuit, method and switch detector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103250061B (en) | Insulation resistance measurement circuit having self-est function without generating leakage current | |
| CN207488457U (en) | A kind of high-voltage DC contactor break-make detecting system | |
| CN2781390Y (en) | Vehicle loading short circuit, open circuit predetection circuit | |
| CN105988082B (en) | The relay status detection method and device of electric automobile high-voltage system | |
| CN105203910A (en) | Electromobile, as well as high-low voltage interlocking detection circuit and interlocking signal detection method thereof | |
| CN104960434B (en) | HV relay sticking control system and method | |
| CN106546915A (en) | A kind of high-voltage relay adhesion state detection circuit and system | |
| CN105717404A (en) | Method and device for detecting insulation fault of power battery system | |
| CN101718842A (en) | Monitoring method and monitoring system for touch switch | |
| CN205941816U (en) | Detect circuit of high -pressure contactor contact state | |
| CN108725351A (en) | The fault diagnosis system of vehicle relay | |
| CN109188266A (en) | A kind of detection circuit and its detection method that high voltage negative relay is adhered | |
| CN102236402A (en) | Energy saving detection circuit | |
| CN205097958U (en) | Electric automobile and high -low pressure interlocking detection circuitry thereof | |
| CN106655145A (en) | Battery bus voltage reverse connection protection circuit | |
| CN103353569A (en) | Relay connection state detecting apparatus | |
| CN102445657B (en) | Method and device for detecting faults of main circuit breaker of locomotive | |
| CN204452063U (en) | Elec. vehicle fuse state testing circuit | |
| CN106696734B (en) | Electric automobile charging pile, electric car and electric car charging method | |
| CN108362937A (en) | A kind of input power circuit for detecting and POL | |
| CN216848061U (en) | Adhesion detection circuit of contactor, vehicle-mounted quick-charging contactor and battery car | |
| CN115091955A (en) | Charging and discharging system of electric automobile and control method thereof | |
| CN203513016U (en) | Power supply open-phase protection device of lift control cabinet | |
| CN110962687B (en) | Fork truck vehicle-mounted power supply system and fork truck charging system | |
| CN211014520U (en) | Pure electric vehicle insulation detection system with contactor adhesion judgment function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |