CN209072047U - A kind of charging gun head protection circuit of direct-current charging post - Google Patents
A kind of charging gun head protection circuit of direct-current charging post Download PDFInfo
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- CN209072047U CN209072047U CN201822256635.4U CN201822256635U CN209072047U CN 209072047 U CN209072047 U CN 209072047U CN 201822256635 U CN201822256635 U CN 201822256635U CN 209072047 U CN209072047 U CN 209072047U
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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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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Abstract
The charging gun head protection circuit of the direct-current charging post of the utility model design, it is main that the movement of pipette tips lock is controlled by H-bridge circuit, while the action state that pipette tips are locked is fed back into charging pile by feed circuit, form a closed control circuit；Pipette tips temperature sensing circuit mainly guarantees that this charging process prevents the carrying conveyance capacity of poor contact or rifle line from further protecting the safety entirely to charge by the temperature detection of charging pile and vehicle interface.Toggle switch is devised according to the feedback signal of different producers simultaneously and relevant peripheral circuit constitutes voltage reversing circuit, to improve the adaptability of circuit.In conclusion this protection circuit has modularized design, securely and reliably, the characteristics of the operation is stable.
Description
Technical field
The utility model patent is related to a kind of charging gun head protection circuit of direct-current charging post, and in particular to rifle lock protection is closed
Loop circuit, excess temperature detection alarm halt circuit, belong to direct-current charging post technical field.
Background technique
Along with the fast development of ev industry, the continuous of electric car is popularized, and makes the electronic vapour of its auxiliary facility
Vehicle direct-current charging post quantity is continuously increased, and many problems does not occur in actual use process, particularly with the safety of charging pile
Problem becomes increasingly conspicuous, and needs to carry out safety measure.When electric car is charged, prevent other other users from arbitrarily plugging just
It in the rifle line of charging, that is, influences in the time of charge user, and security risk that may be present, so devising rifle lock protection electricity
Road.Wherein during the charging process, since rifle and vehicle end interface have high current to flow through, if contact is not exclusively, it may result in generation
Vehicle and charging pile damage, or even fire occurs, therefore there must be for the temperature sensing circuit of pipette tips.
Utility model content
To solve the above problems, the utility model, which provides, proposes a kind of one complete closed-loop system of formation, work
Stablize, a kind of charging gun head protection circuit of safe and reliable direct-current charging post.
In order to achieve the above object, a kind of charging gun head protection circuit of direct-current charging post designed by the utility model,
Protection circuit, feedback selection circuit and temperature sensing circuit are locked including rifle, it is characterized in that the rifle lock protection circuit mainly may be used
2 groups of H-bridge circuit control pipette tips locks are exported including chip L298P, chip L298P, and show that pipette tips lock shape by resistance and LED
State；The feedback selection circuit is made of photo-coupler, triode and toggle switch；The temperature sensing circuit energization source
Module REF3140 provides burning voltage, and is connect by the two-arm that two resistance form electric bridge with thermal resistance PT1000 and pass through fortune
Calculate amplifier OPA207 output signal.
Further embodiment is that the 4 tunnels output of chip L298P is respectively defined as in the rifle lock protection circuit
LOCK1-, LOCK1+, LOCK2-, LOCK2+, the output of 4 tunnels pass through the diode and 12V of positive model 1N4007-M7 respectively
Voltage connection, the output of 4 tunnels are connect by reversed model 1N4007-M7 diode with GND respectively, what LOCK1- was passed sequentially through
The diode of LED, 10K resistance and reversed model SS14 are connect with LOCK1+, LOCK1- also pass sequentially through reversed LED,
The diode of 10K resistance and the model SS14 of forward direction are connect with LOCK1+；LOCK2- passes sequentially through LED, 10K resistance and reversed
The diode of model SS14 connect with LOCK2+, LOCK2- also passes sequentially through the type of reversed LED, 10K resistance and forward direction
It number is connect for the diode of SS14 with LOCK2+.
Further embodiment is the photo-coupler model EL817-S of the feedback selection circuit, the foot of photo-coupler
The feedback signal S2 of 1 connection pipette tips lock, foot 2, the foot 3 of photo-coupler meet GND, and the foot 4 of photo-coupler connects output signal
LOCKA, and being also connected on 3V power supply by 1K resistance on the foot 4 of photo-coupler, the described triode model SS8050, three
The foot 1 of pole pipe is output signal Status_A and foot 1 also connects 3V power supply by 1K resistance, and the foot 2 of triode connects LOCKA letter
Number, the foot 3 of triode meets GND；There are three connectors for the toggle switch tool, and the com port output signal of output, remaining two
A mouth is separately connected signal LOCKA and signal Status_A.
Further embodiment is that the temperature sensing circuit includes the electricity of the output of REF3140 containing power module 4.096V
Pressure, three models are the amplifier and thermal resistance PT1000 of OPA207, and wherein the foot 1 of thermal resistance PT1000 is connected by 7.5K resistance
The power supply of 4.096V is connect, the foot 2 of thermal resistance PT1000 connects the foot 3 of the first amplifier, thermal resistance PT1000 by the resistance of 820R
Foot 3 connect GND, the foot 2 of the first amplifier is connect by the resistance of 8K with the foot 6 of the first amplifier, the connection of foot 6 of the first amplifier
The foot 6 for connecting third amplifier by the resistance of 10K again simultaneously, the foot of the first amplifier are connect after 10K resistance with the foot 3 of third amplifier
3 are connected by the resistance of 7.5K and the power supply of 4.096V；The foot 3 of second amplifier is connect with the foot 1 of PT1000, the foot of the second amplifier
2 are connect by the resistance of 8K with the foot 6 of the second amplifier, are connected after the connection 10K resistance of foot 6 of the second amplifier with the foot 2 of third amplifier
It connecing while GND is connected by the resistance of 10K again, the foot 4 of three amplifiers is all connected with -5V power supply, and the foot 7 of three amplifiers is all connected with+
5V power supply, the foot 6 of third amplifier are output signal ADC_PT100.
Compared with prior art, the obtained a kind of charging gun head protection circuit of direct-current charging post of the utility model, it is main
The movement of pipette tips lock is controlled by H-bridge circuit, while the action state that pipette tips are locked is fed back into charging pile, shape by feed circuit
At a closed control circuit；Pipette tips temperature sensing circuit mainly guarantees this by the temperature detection of charging pile and vehicle interface
Charging process prevents the carrying conveyance capacity of poor contact or rifle line from further protecting the safety entirely to charge.Simultaneously according to not
The feedback signal of same producer devises toggle switch and relevant peripheral circuit constitutes voltage reversing circuit, to improve
The adaptability of circuit.In conclusion this protection circuit has modularized design, securely and reliably, the characteristics of the operation is stable.
Detailed description of the invention
Fig. 1 is 1 rifle of embodiment lock protection circuit diagram.
Fig. 2 is that embodiment 1 feeds back selection circuit figure.
Fig. 3 is 1 temperature sensing circuit figure of embodiment.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe.
Embodiment 1.
A kind of charging gun head protection circuit of direct-current charging post of the present embodiment description, including rifle lock protection circuit, feedback
Selection circuit and temperature sensing circuit, it is characterized in that the rifle lock protection circuit mainly may include chip L298P, chip
L298P exports 2 groups of H-bridge circuit control pipette tips locks, and shows pipette tips lock status by resistance and LED；The feedback selects electricity
Route photo-coupler, triode and toggle switch composition；The temperature sensing circuit energization source module REF3140 provides stabilization
Voltage, and connect by the two-arm that two resistance form electric bridge with thermal resistance PT1000 and pass through operational amplifier OPA207 output letter
Number.
As shown in Figure 1, in the described rifle lock protection circuit the 4 tunnels output of chip L298P be respectively defined as LOCK1-,
LOCK1+, LOCK2-, LOCK2+, the output of 4 tunnels are connected by the diode and 12V voltage of positive model 1N4007-M7 respectively
It connects, the output of 4 tunnels is connect by reversed model 1N4007-M7 diode with GND respectively, LED, 10K that LOCK1- is passed sequentially through
The diode of resistance and reversed model SS14 are connect with LOCK1+, and LOCK1- also passes sequentially through reversed LED, 10K resistance
It is connect with the diode of positive model SS14 with LOCK1+；LOCK2- passes sequentially through LED, 10K resistance and reversed model
It is connect for the diode of SS14 with LOCK2+, LOCK2- also passes sequentially through the model of reversed LED, 10K resistance and forward direction
The diode of SS14 is connect with LOCK2+.
As shown in Fig. 2, the photo-coupler model EL817-S of the feedback selection circuit, the foot 1 of photo-coupler connect
The feedback signal S2 of pipette tips lock, foot 2, the foot 3 of photo-coupler meet GND, and the foot 4 of photo-coupler connects output signal LOCKA, and light
It is also connected on 3V power supply by 1K resistance on the foot 4 of coupler, the triode model SS8050, the foot 1 of triode
For output signal Status_A and foot 1 also connects 3V power supply by 1K resistance, and the foot 2 of triode connects LOCKA signal, triode
Foot 3 meet GND；There are three connector, the com port output signal of output, other two mouth difference for the toggle switch tool
Connection signal LOCKA and signal Status_A.
As shown in figure 3, the temperature sensing circuit include REF3140 containing power module output 4.096V voltage, three
A model is the amplifier and thermal resistance PT1000 of OPA207, and wherein the foot 1 of thermal resistance PT1000 is connected by 7.5K resistance
The power supply of 4.096V, the foot 2 of thermal resistance PT1000 connect the foot 3 of the first amplifier by the resistance of 820R, thermal resistance PT1000's
Foot 3 connects GND, and the foot 2 of the first amplifier is connect by the resistance of 8K with the foot 6 of the first amplifier, and the foot 6 of the first amplifier connects 10K
The foot 6 for connecting third amplifier by the resistance of 10K again simultaneously is connect after resistance with the foot 3 of third amplifier, the foot 3 of the first amplifier is logical
The power supply of the resistance and 4.096V of crossing 7.5K connects；The foot 3 of second amplifier is connect with the foot 1 of PT1000, and the foot 2 of the second amplifier is logical
The resistance for crossing 8K is connect with the foot 6 of the second amplifier, and the foot 6 of the second amplifier is connect together after connecting 10K resistance with the foot 2 of third amplifier
When pass through the resistance connection GND of 10K again, the foot 4 of three amplifiers is all connected with -5V power supply, and the foot 7 of three amplifiers is all connected with+5V electricity
Source, the foot 6 of third amplifier are output signal ADC_PT100.
When work, the rifle lock protection circuit is mainly made of L298P, photo-coupler and its peripheral circuit.L298P
There are four tunnel input signals, exports 2 groups of H-bridge circuits to control pipette tips lock.Pipette tips lock feedback signal opposite when acting is connected to light
The input terminal of coupler transmits isolation input by optocoupler and monitors in real time to MCU, control and the different factories of feedback due to pipette tips lock
Family's feedback signal is different, therefore increases toggle switch voltage reversing circuit.
Pipette tips temperature sensing circuit is made of power module and differential amplifier circuit.Power module is that have REF3140 to pass through
5V voltage is inputted, input voltage of the stable 4.096V as electric bridge is generated.The resistance of two 7.5K is as electric bridge
Two-arm, mainly in view of the electric current for flowing through PT1000 is no more than 0.5mA.Bridge signal input be sent to be made of OPA207 it is differential
In amplifying circuit.Voltage output after 17 times of amplification is sent to the AD sample port of MCU.Pass through the calculation formula of bridge balance
The resistance value that selection can be calculated is 820 Europe；Differential amplifier circuit amplification factor is 17 times.It can be calculated according to the parameter of selection:
At -40 degrees Celsius: output voltage 170.936mV；At 0 degree Celsius: output voltage 1.329V；It is defeated at 40 degrees Celsius
Voltage is 2.432V out；At 70 degrees Celsius, output voltage 3.221V.
Claims (4)
1. a kind of charging gun head protection circuit of direct-current charging post, including rifle lock protection circuit, feedback selection circuit and temperature inspection
Slowdown monitoring circuit, it is characterized in that the rifle lock protection circuit mainly may include chip L298P, chip L298P exports 2 groups of H-bridge circuits
Pipette tips lock is controlled, and pipette tips lock status is shown by resistance and LED；The feedback selection circuit is by photo-coupler, triode
And toggle switch composition；The temperature sensing circuit energization source module REF3140 provides burning voltage, and by two resistance groups
It is connect at the two-arm of electric bridge with thermal resistance PT1000 and passes through operational amplifier OPA207 output signal.
2. the charging gun head protection circuit of a kind of direct-current charging post according to claim 1, it is characterized in that the rifle is locked
The 4 tunnels output of chip L298P is respectively defined as LOCK1-, LOCK1+, LOCK2-, LOCK2+, 4 tunnels output difference in protection circuit
It is connect by the diode of positive model 1N4007-M7 with 12V voltage, the output of 4 tunnels passes through reversed model respectively
1N4007-M7 diode is connect with GND, two poles of LED, 10K resistance and reversed model SS14 that LOCK1- is passed sequentially through
Pipe connect with LOCK1+, LOCK1- also pass sequentially through reversed LED, 10K resistance and positive model SS14 diode and
LOCK1+ connection；LOCK2- passes sequentially through LED, 10K resistance and the diode of reversed model SS14 is connect with LOCK2+,
The diode that LOCK2- also passes sequentially through the model SS14 of reversed LED, 10K resistance and forward direction is connect with LOCK2+.
3. the charging gun head protection circuit of a kind of direct-current charging post according to claim 1, it is characterized in that the feedback
The photo-coupler model EL817-S of selection circuit, the foot 1 of photo-coupler connect the feedback signal S2 of pipette tips lock, photo-coupler
Foot 2, foot 3 meet GND, the foot 4 of photo-coupler connects output signal LOCKA, and is also connected by 1K resistance on the foot 4 of photo-coupler
It is connected on 3V power supply, the triode model SS8050, the foot 1 of triode is output signal Status_A and foot 1 is also logical
1K resistance connection 3V power supply is crossed, the foot 2 of triode connects LOCKA signal, and the foot 3 of triode meets GND；The toggle switch tool
There are three connector, the com port output signal of output, other two mouth is separately connected signal LOCKA and signal Status_A.
4. the charging gun head protection circuit of a kind of direct-current charging post according to claim 1, it is characterized in that the temperature
Detection circuit includes the voltage of the output of REF3140 containing power module 4.096V, and three models are the amplifier and thermoelectricity of OPA207
PT1000 is hindered, wherein the foot 1 of thermal resistance PT1000 connects the power supply of 4.096V, the foot 2 of thermal resistance PT1000 by 7.5K resistance
The foot 3 of the first amplifier is connected by the resistance of 820R, the foot 3 of thermal resistance PT1000 connects GND, and the foot 2 of the first amplifier passes through 8K
Resistance connect with the foot 6 of the first amplifier, the foot 6 of the first amplifier is connect simultaneously again after connecting 10K resistance with the foot 3 of third amplifier
The foot 6 of third amplifier is connected by the resistance of 10K, the foot 3 of the first amplifier is connected by the resistance of 7.5K and the power supply of 4.096V；
The foot 3 of second amplifier is connect with the foot 1 of PT1000, and the foot 2 of the second amplifier is connect by the resistance of 8K with the foot 6 of the second amplifier,
The foot 6 of second amplifier, which connects, connect after 10K resistance simultaneously again by the resistance connection GND of 10K with the foot 2 of third amplifier, and three
The foot 4 of amplifier is all connected with -5V power supply, and the foot 7 of three amplifiers is all connected with+5V power supply, and the foot 6 of third amplifier is output signal ADC_
PT100。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822256635.4U CN209072047U (en) | 2018-12-29 | 2018-12-29 | A kind of charging gun head protection circuit of direct-current charging post |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822256635.4U CN209072047U (en) | 2018-12-29 | 2018-12-29 | A kind of charging gun head protection circuit of direct-current charging post |
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| CN209072047U true CN209072047U (en) | 2019-07-05 |
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| CN201822256635.4U Active CN209072047U (en) | 2018-12-29 | 2018-12-29 | A kind of charging gun head protection circuit of direct-current charging post |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109462209A (en) * | 2018-12-29 | 2019-03-12 | 数源科技股份有限公司 | A kind of charging gun head protection circuit of direct-current charging post |
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- 2018-12-29 CN CN201822256635.4U patent/CN209072047U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109462209A (en) * | 2018-12-29 | 2019-03-12 | 数源科技股份有限公司 | A kind of charging gun head protection circuit of direct-current charging post |
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