CN207128639U - A kind of electric automobile main contactor failure detector - Google Patents
A kind of electric automobile main contactor failure detector Download PDFInfo
- Publication number
- CN207128639U CN207128639U CN201720798606.3U CN201720798606U CN207128639U CN 207128639 U CN207128639 U CN 207128639U CN 201720798606 U CN201720798606 U CN 201720798606U CN 207128639 U CN207128639 U CN 207128639U
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- contactor
- resistance
- relay
- charging
- main contactor
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Abstract
The utility model discloses a kind of electric automobile main contactor failure detector, including power accumulator and charging socket, in addition to power accumulator, first, second high-tension connector, preliminary filling contactor, preliminary filling resistance, main contactor, charging contactor, main contactor fault detection relay, charging contactor failure inspection relay and increase detection bleeder circuit.On the basis of the utility model is according to existing vehicle alarm device gathered data, the main contactor rear end increase detection bleeder circuit on charging circuit, because current new energy car uses the completely isolated form of height piezoelectricity substantially, so high-tension circuit cannot directly access low-voltage circuit.The utility model is applied to that vehicle contact device failure situation can not be known after electricity under vehicle, facilitates vehicle trouble maintenance to find failure problems point in time, it is known that questions and prospect, is avoided during maintenance overhaul because rear end high-tension electricity causes security incident before maintenance vehicle.
Description
Technical field
It the utility model is related to electric vehicle engineering fault detection technique field, more particularly to a kind of contact of electric vehicle master
Device failure detector.
Background technology
In recent years with popularization of the country to new energy, major automobile production enterprise increases research and development and Productive statistics, but
With being become increasingly conspicuous the problem of increasing electrokinetic cell secure context for new energy vehicle, main contactor is defeated as electrokinetic cell electricity
The core hinge gone out, plays vital effect, so its security, the demand of reliability are then particularly important, main contactor
Main failure mode is mainly adhesion, and when the failure produces, high-tension electricity can directly pass to consuming parts, even if vehicle does not have
Starting back-end circuit also can be powered, easily produces potential safety hazard.
And currently for main contactor adhesion diagnosis mainly by judging the precharge of preliminary filling resistance when the electricity on vehicle after
Situation about whether completing determine main contactor whether adhesion, but when the upper electricity of vehicle be can not know relay whether failure
, because the adhesion of relay is mainly derived from contact adhesive moment or contact disjunction moment, if adhesive moment has produced
It is undetectable during adhesion, because vehicle is now just needing main contactor attracting state, but when electricity under vehicle, if now contacted
Device adhesion just can not disjunction, but the power-off of part driver habit pull key lead to not detect main contactor malfunction,
If vehicle is without main contactor fault detect, after vehicle trouble is alarmed, if can not know trouble point in time, to maintenance
Vehicle produces great blind area, easily produces dangerous.Another method is then to increase contact detection inside relay, is so done
Method can save space but cost can increased, and when the whole contactor of contactor failure is required for changing, repair replacement cost
Pressure is larger.
Utility model content
The purpose of this utility model is to provide a kind of electric automobile main contactor failure detector, can main contactor glue
Trouble point even can not be known in time after failure, improve vehicle security.
The technical solution adopted in the utility model is：
A kind of electric automobile main contactor failure detector, including power accumulator and charging socket, in addition to power
Battery, first, second high-tension connector, preliminary filling contactor, preliminary filling resistance, main contactor, charging contactor, main contactor event
Barrier detection relay, charging contactor failure inspection relay and increase detection bleeder circuit, described increase detection bleeder circuit
Including first, second, third, fourth divider resistance, the first relay, the second relay and power supply；Described power accumulator
Positive pole pass through one end that the first high-tension connector connects charging contactor, the other end of charging contactor and charging socket positive pole
Output end is connected, while the first high-tension connector is connected by preliminary filling contactor, preliminary filling resistance with load negative pole, power accumulator
Negative pole be connected by the second high-tension connector with charging socket cathode output end, while with load positive pole be connected；
The both ends of the main contactor is connected in parallel on preliminary filling contactor and preliminary filling resistance the connects circuit to be formed, described
First, one end is connected with load positive pole after the series connection of the second divider resistance, and the other end is connected with load negative pole, wherein the second divider resistance
Both ends be connected with the coil input end of the first relay, contact output end one end of the first relay is connected with positive source,
The other end is as the first pin input signal end；
Wherein one end of the coil input end of the second described relay connects the 3rd divider resistance and the 4th partial pressure simultaneously
One end of resistance, the other end are connected with the cathode output end of charging socket, contact output end one end of the second relay and power supply
Positive pole is connected, and the other end is as second pin input signal end；The other end of 3rd divider resistance and the positive pole of charging socket are defeated
Go out end to be connected, the other end of the 4th divider resistance is connected with the cathode output end of charging socket；Described the first pin input letter
Number end, second pin input signal end be used for connect alarm harvester input.
Also include fuse, described fuse is arranged on charging socket cathode output end.
The resistance of described first divider resistance is identical with the resistance of the 3rd divider resistance, the resistance of the second divider resistance
Value is identical with the resistance of the 4th divider resistance.
On the basis of the utility model is according to existing vehicle alarm device gathered data, the main contactor rear end on charging circuit
Increase detection bleeder circuit, because current new energy car uses the completely isolated form of height piezoelectricity substantially, so high-tension circuit is not
Low-voltage circuit can be directly accessed.The utility model is applied to that vehicle contact device failure situation can not be known after electricity under vehicle, convenient
Vehicle trouble maintenance finds failure problems point in time, it is known that questions and prospect before maintenance vehicle, when avoiding maintenance overhaul
Because rear end high-tension electricity causes security incident.
Brief description of the drawings
Fig. 1 is figure schematic block circuit diagram of the present utility model.
The high-tension connector of 1- power accumulators 2 first, 3- the second high-tension connector 4- preliminary filling contactor 5- preliminary filling resistance
6- main contactor 7- charging contactor 8- main contactor fault detection relay 9- charging contactors failure inspection relay 10-
Charging socket.
Embodiment
As shown in figure 1, the utility model includes power accumulator and charging socket, in addition to power accumulator, first,
Two high-tension connectors, preliminary filling contactor, preliminary filling resistance, main contactor, charging contactor, main contactor fault detection relay,
Charging contactor failure examines relay and increase detection bleeder circuit, and described increase detection bleeder circuit includes；Described is dynamic
The positive pole of power battery connects one end of charging contactor, the other end of charging contactor and charging by the first high-tension connector
Socket cathode output end is connected, while the first high-tension connector is connected by preliminary filling contactor, preliminary filling resistance with load negative pole, is moved
The negative pole of power battery is connected by the second high-tension connector with charging socket cathode output end, while is connected with load positive pole；
The both ends of the main contactor is connected in parallel on preliminary filling contactor and preliminary filling resistance the connects circuit to be formed, described
First, one end is connected with load positive pole after the series connection of the second divider resistance, and the other end is connected with load negative pole, wherein the second divider resistance
Both ends be connected with the coil input end of the first relay, contact output end one end of the first relay is connected with positive source,
The other end is as the first pin input signal end；
Wherein one end of the coil input end of the second described relay connects the 3rd divider resistance and the 4th partial pressure simultaneously
One end of resistance, the other end are connected with the cathode output end of charging socket, contact output end one end of the second relay and power supply
Positive pole is connected, and the other end is as second pin input signal end；The other end of 3rd divider resistance and the positive pole of charging socket are defeated
Go out end to be connected, the other end of the 4th divider resistance is connected with the cathode output end of charging socket.Also include fuse, it is described
Fuse is arranged on charging socket cathode output end.The resistance of described first divider resistance and the 3rd divider resistance
Resistance is identical, and the resistance of the second divider resistance is identical with the resistance of the 4th divider resistance.
The utility model increases main contactor rear end detection bleeder circuit, because current new energy car uses height substantially
The completely isolated form of piezoelectricity, so high-tension circuit cannot directly access low-voltage circuit.First point mainly avoids touching from security consideration
Electricity, another point prevent insulation detection device report insulation fault.The utility model is applied to not know that vehicle connects after electricity under vehicle
Tentaculum failure situation, vehicle trouble maintenance is facilitated to find failure problems point in time, it is known that problem is former before maintenance vehicle
Cause, avoid during maintenance overhaul because rear end high-tension electricity causes security incident.Specifically, after electric discharge main contactor and charging contactor
Hold increases by two divider resistances respectively, R1, R2 and R3, R4 (see Fig. 1), R1=R3, R2=R4 above resistance.Due to 12V relays
The operating voltage range of device 1 and relay 2 is 9V ~ 16V, after caring for divider resistance partial pressure R2, R4 both end voltage must be made to meet this
Voltage range (9V ~ 16V).
Due to electrokinetic cell both end voltage U1=UR1+UR2=UR3+UR4
Note：1、UR1For R1 resistance both end voltages, UR2For R2 resistance both end voltages, UR3For R3 resistance both end voltages, UR4For R4
Resistance both end voltage.
To reduce power consumption, resistance R1, R3 select 30K Ω, according to formula.
Because the voltage of battery is is worth between two parties, R2, R2 value must be determined according to cell voltage.
Assuming that U1 minimum voltages are 300V, ceiling voltage 500V.UR2、UR4Minimum voltage is 9V, ceiling voltage 16V.
When U1 is minimum voltage 300V, then UR2, UR4 9V, when U1 is ceiling voltage 500V, then UR2、UR4For 16V, by the above
It can obtain.
Learnt by above-mentioned formula：927.84Ω<R2<991.74Ω.
By resistance specification of the resistance as R2, R4 that upper optional specification is 950 Ω.The selection of specific R2, R4 value according to
Virtual voltage is worth between two parties to be chosen according to the method described above.After specification is selected, you can sentenced by monitoring each signal end signal
It is disconnected：Divider resistance R2 and R4 rear ends in parallel first relay and the second relay respectively, when voltage is within this range at relay
In attracting state.Now following signal is acquired according to existing vehicle alarm device：
Key power source ON shelves signal
Pin input signal 1
Pin input signal 2
Charging gun low pressure accessory power supply A+ signals
Wherein, main contactor breakdown judge condition is：Key is without ON shelves power supply signals, while pin input signal 1 has height
Level signal charging contactor breakdown judge condition is：Charging gun low pressure accessory power supply A+ is without high level signal, while pin is defeated
Entering signal 2 has high level signal.So it is accurately to judge failure cause and when accessible device adhesion fault in fact also can be timely
Know trouble point, improve vehicle security.
Claims (3)
1. a kind of electric automobile main contactor failure detector, including power accumulator and charging socket, it is characterised in that：Also
Including first, second high-tension connector, preliminary filling contactor, preliminary filling resistance, main contactor, charging contactor, main contactor failure
Detect relay, charging contactor failure inspection relay and increase detection bleeder circuit, described increase detection bleeder circuit bag
Include first, second, third, fourth divider resistance, the first relay, the second relay and power supply；Described power accumulator
Positive pole connects one end of charging contactor by the first high-tension connector, and the other end and charging socket positive pole of charging contactor are defeated
Go out end connection, while the first high-tension connector is connected by preliminary filling contactor, preliminary filling resistance with load negative pole, power accumulator
Negative pole is connected by the second high-tension connector with charging socket cathode output end, while is connected with load positive pole；
The both ends of the main contactor is connected in parallel on preliminary filling contactor and preliminary filling resistance the connects circuit to be formed, described first,
One end is connected with load positive pole after the series connection of second divider resistance, and the other end is connected with load negative pole, wherein the second divider resistance
Both ends are connected with the coil input end of the first relay, and contact output end one end of the first relay is connected with positive source, separately
One end is as the first pin input signal end；
Wherein one end of the coil input end of the second described relay connects the 3rd divider resistance and the 4th divider resistance simultaneously
One end, the other end is connected with the cathode output end of charging socket, contact output end one end of the second relay and positive source
It is connected, the other end is as second pin input signal end；The other end of 3rd divider resistance and the cathode output end of charging socket
It is connected, the other end of the 4th divider resistance is connected with the cathode output end of charging socket；Described the first pin input signal end,
Second pin input signal end is used for the input for connecting alarm harvester.
2. electric automobile main contactor failure detector according to claim 1, it is characterised in that：Also include fusing
Device, described fuse are arranged on charging socket cathode output end.
3. electric automobile main contactor failure detector according to claim 2, it is characterised in that：Described first point
The resistance of piezoresistance is identical with the resistance of the 3rd divider resistance, the resistance of the second divider resistance and the resistance phase of the 4th divider resistance
Together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720798606.3U CN207128639U (en) | 2017-07-04 | 2017-07-04 | A kind of electric automobile main contactor failure detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720798606.3U CN207128639U (en) | 2017-07-04 | 2017-07-04 | A kind of electric automobile main contactor failure detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207128639U true CN207128639U (en) | 2018-03-23 |
Family
ID=61633896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720798606.3U Expired - Fee Related CN207128639U (en) | 2017-07-04 | 2017-07-04 | A kind of electric automobile main contactor failure detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207128639U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107284246A (en) * | 2017-07-04 | 2017-10-24 | 无锡英捷汽车科技有限公司 | A kind of electric automobile main contactor failure detector |
| CN113866645A (en) * | 2021-09-07 | 2021-12-31 | 上海德朗能电子科技有限公司 | Rechargeable battery, fault detection method and device of contactor, and storage medium |
-
2017
- 2017-07-04 CN CN201720798606.3U patent/CN207128639U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107284246A (en) * | 2017-07-04 | 2017-10-24 | 无锡英捷汽车科技有限公司 | A kind of electric automobile main contactor failure detector |
| CN113866645A (en) * | 2021-09-07 | 2021-12-31 | 上海德朗能电子科技有限公司 | Rechargeable battery, fault detection method and device of contactor, and storage medium |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180323 Termination date: 20200704 |
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| CF01 | Termination of patent right due to non-payment of annual fee |