CN106864279A - A kind of power-off protecting circuit and its method of work for electric automobile charging pile - Google Patents
A kind of power-off protecting circuit and its method of work for electric automobile charging pile Download PDFInfo
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- CN106864279A CN106864279A CN201510917601.3A CN201510917601A CN106864279A CN 106864279 A CN106864279 A CN 106864279A CN 201510917601 A CN201510917601 A CN 201510917601A CN 106864279 A CN106864279 A CN 106864279A
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- Prior art keywords
- contactor
- power
- charging pile
- input
- disconnects
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/30—Constructional details of charging stations
- B60L53/31—Charging columns specially adapted for electric vehicles
-
- 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
-
- 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
-
- 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
Abstract
The present invention discloses a kind of power-off protecting circuit and its method of work for electric automobile charging pile, wherein, the circuit includes：A.C. contactor U1, collision detection switch E1, E2 ... En, starting switch Es, power input Lin, Nin connection external electrical network input power of the A.C. contactor U1, power output end Lout, Nout of the A.C. contactor U1 are connected with the power input of charging pile；The low-voltage power supply end C1 of the A.C. contactor U1 passes sequentially through collision detection switch E1, E2 ... En and is connected with the power output end C4 of A.C. contactor U1；The power input C3 of the A.C. contactor U1 is connected with the low-voltage power supply end C2 of the A.C. contactor U1；The low-voltage power supply end C1 of the A.C. contactor U1 also passes sequentially through collision detection switch E1, E2 ... En, starting switch Es and is connected with the low-voltage power supply end C2 of A.C. contactor U1.
Description
Technical field
The present invention relates to intelligent power technical field, in particular it relates to a kind of be used for electric automobile charging pile
Power-off protecting circuit and its method of work.
Background technology
With the consumption of fossil energy, various countries carry out the research of new energy technology already, find new energy
Source supply mode, advocates energy-saving and emission-reduction.For China, due to the application of new technology, car ownership
Rise appreciably, drastically increase the convenience of life, but also bring some side effects simultaneously, make
The problems such as environmental pollution and traffic congestion.Therefore, it is domestic at present progressively to have carried out many kinds of measures to delay
The problem is solved, input substantial contribution researches and develops new-energy automobile, and appropriate to new-energy automobile in policy
Direction inclines, and encourages people's purchase and uses new-energy automobile.Wherein, Development of Electric Vehicles is particularly fast
Speed, popularity rate is also stepped up, thus needs exist for certain charging auxiliary facility, i.e. charging pile.
Automobile charges by the way of self-service, similar to family's power purchase, but can be likely to occur charging pile quilt
The situation of damage, such as, because driving technology is not consummate enough, collide charging pile and produce electric shock or fire
Deng, therefore protection to charging pile just seems increasingly important.In order to loss is preferably minimized, it is necessary to right
Charging pile is sufficiently protected, and makes it have the function of automatically powering off.
Protection in the prior art for charging pile is not perfect enough, is partly detected by sensor technology
The crash acceleration or charging pile deviation angle of charging pile, if more than the limitation scope of setting, controlling
Charging pile is powered off, and such power-off protection method may bring problems with：
Using acceleration transducer or angular transducer, it is necessary to using complicated detection and control technology,
The complexity of technology can influence response, reliability and the follow-up maintenance of system, such as each chip is all
There is certain operating temperature range, chip can not effectively protect cisco unity malfunction after transfiniting,
Equally also there is certain requirement to humidity etc.；
Using sensor technology, system cost can be significantly increased, and charging pile is used as a kind of high-volume
The infrastructure of application, cost is more low more is easy to application.
The content of the invention
In order to solve the big skill of charging pile power-off protection poor reliability, cost consumption in the prior art
Art problem, the present invention proposes a kind of for the power-off protecting circuit of electric automobile charging pile and its work side
Method.
A kind of power-off protecting circuit for electric automobile charging pile of the invention, including：
A.C. contactor U1, collision detection switch E1, E2 ... En, starting switch Es, the exchange
Power input Lin, Nin connection external electrical network input power of contactor U1, the A.C. contactor
Power output end Lout, Nout of U1 is connected with the power input of charging pile；
The low-voltage power supply end C1 of the A.C. contactor U1 pass sequentially through collision detection switch E1,
E2 ... En are connected with the power output end C4 of A.C. contactor U1；
The low-voltage power supply of the power input C3 of the A.C. contactor U1 and A.C. contactor U1
End C2 is connected；
The low-voltage power supply end C1 of the A.C. contactor U1 also pass sequentially through collision detection switch E1,
E2 ... En, starting switch Es are connected with the low-voltage power supply end C2 of A.C. contactor U1.
Power-off protecting circuit for electric automobile charging pile of the invention, using universal elements, design
Method is simple, with low cost, using it is convenient, be quick on the draw, while, follow-up maintenance low to environmental requirement
It is convenient, large batch of scene application can be met, it is easy to utilize；Can be when charging pile collides
Input power is disconnected in time, it is ensured that reliability and security that charging pile is charged for electric automobile.
The method of work of power-off protecting circuit of the invention, including：
Input power is divided into 2 tunnels, the 1st tunnel powers and supplies low-voltage alternating-current input power Vc, and the 2nd tunnel supplies
Electricity supplies charging pile by power input Lin, Nin and power output end Lout, Nout；
2nd tunnel powers to be powered by the 1st tunnel and is controlled；
When the starting switch Es is closed, the 1st tunnel is powered and the 2nd tunnel powered operation, and charging pile is connected
Input power is started working；
When the starting switch Es disconnects, the 1st tunnel powers to be powered with the 2nd tunnel and works on, charging pile
Input power is connected to work on.
The method of work of the power-off protecting circuit for electric automobile charging pile of the invention, using universal element
Device, method for designing is simple, with low cost, using it is convenient, be quick on the draw, while low to environmental requirement,
Follow-up maintenance is convenient, can meet large batch of scene application, easy to utilize；Can be sent out in charging pile
Disconnect input power in time during raw collision, it is ensured that the reliability that charging pile is charged for electric automobile with
Security.
Other features and advantages of the present invention will illustrate in the following description, also, partly from
Become apparent in specification, or understood by implementing the present invention.The purpose of the present invention and its
His advantage can be by specifically noted knot in the specification, claims and accompanying drawing write
Structure is realized and obtained.
Below by drawings and Examples, technical scheme is described in further detail.
Brief description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, and constitutes a part for specification, with
Embodiments of the invention are used to explain the present invention together, are not construed as limiting the invention.In accompanying drawing
In：
Fig. 1 is the structural representation of the power-off protecting circuit for electric automobile charging pile of the invention；
Fig. 2 is that the input power work of the power-off protecting circuit for electric automobile charging pile of the invention is shown
It is intended to.
Specific embodiment
Below in conjunction with the accompanying drawings, specific embodiment of the invention is described in detail, it is to be understood that this
The protection domain of invention is not limited by specific embodiment.
In order to solve the big skill of charging pile power-off protection poor reliability, cost consumption in the prior art
Art problem, the present invention proposes a kind of for the power-off protecting circuit of electric automobile charging pile and its work side
Method.Power-off protecting circuit of the invention is embedded in the inside of charging pile, can control the input electricity of charging pile
Pressure, can automatically cut off power supply when charging pile is accidentally hit, so as to avoid further damage
Become estranged potential safety hazard.The power-off protecting circuit is a single circuit, installed in charging pile service voltage
Front end.
As shown in table 1, simplicity of explanation is carried out to the technical term occurred in the present invention.
Table 1
Embodiment one
The present embodiment is carried out specifically to the power-off protecting circuit for electric automobile charging pile of the invention
It is bright：
In the power-off protecting circuit shown in Fig. 1, Lin and Nin is the input voltage of external electrical network, Lout
It is the output voltage of U1, the i.e. service voltage of charging pile with Nout, E1, E2 ... En are mounted in and fill
(multiple collision detection switch series connection, collide collision detection switch around electric stake casing when certain or some
Detection switch can be cut off the electricity supply by collision rift), U1 is A.C. contactor.
As shown in figure 1, the power-off protecting circuit for electric automobile charging pile of the invention, including：Hand over
Stream contactor U1, collision detection switch E1, E2 ... En, the power input of starting switch Es, U1
Lin, Nin connect external electrical network input power, power output end Lout, Nout of U1 and charging pile
Power input is connected；The low-voltage power supply end C1 of U1 passes sequentially through E1, E2 ... the power supply of En and U1
Output end C4 is connected；The low-voltage power supply end C2 of the power input C3 and U1 of U1 is connected；U1's is low
Pressure feeder ear C1 also pass sequentially through E1, E2 ... En, the low-voltage power supply end C2 of starting switch Es and U1
It is connected.
Low-voltage alternating-current input power Vc, C1, E1, E2 ... En, Es, C2 are connected between C1 and E1
Composition A.C. contactor current supply circuit A；C1, E1, E2 ... En, C4, C3, C2 composition exchange connect
Tentaculum current supply circuit B.Es is normal open switch, and E1, E2 ... En are normally closed switch.When Es is closed,
Loop A is turned on, and Lin is connected with Lout, and Nin is connected with Nout, and C3 is connected with C4, loop B
Conducting, charging pile is started working；Loop A works when system starts, and after system starts, Es is automatic
Disconnect, loop A is disconnected, and now U1 can be powered by loop B, so as to continue to closure state
(Lin is connected with Lout, and Nin is connected with Nout, and C3 is connected with C4).
After Es disconnects, loop A disconnects, and loop B continues to turn on, and charging pile works on.Now when
In E1, E2 ... En during any one or more disconnections, because main circuit power supply disconnects, loop B also breaks
Open, A.C. contactor U1 is stopped, charging pile input power disconnects and being stopped；In the collision for disconnecting
After detection switch closure, if Es is closed again, loop A conductings, Lin connects with Lout, Nin and
Nout is connected, and C3 is connected with C4, then loop B is also switched on, and charging pile restarts work.
Embodiment two
Embodiment two is below used, to the power-off protecting circuit for electric automobile charging pile of the invention
Method of work is described in detail：
U1 is A.C. contactor (adhesive end high-voltage switch gear at least needs 3 tunnels), can be defeated by low-voltage alternating-current
Enter power supply Vc controls, when C1 and C2 two ends add voltage, the electromagnet coil power in U1, electricity
Magnet attraction, dual pressure control switch closure, Lin connected with Lout, and Nin is connected with Nout, C3 with
C4 is connected, so that charging pile can connect input power, it is that electric automobile is charged.
According to power-off protecting circuit as shown in Figure 1, it should be understood by those skilled in the art that：Ac contactor
If voltage Vc between C1 the and C2 two ends of device U1, A.C. contactor U1 could work, U1 works
Lin is connected with Lout after work, and Nin is connected with Nout, and C3 is connected with C4.Before system startup,
Lin and Lout disconnects, and Nin and Nout disconnects, and C3 and C4 disconnects, when Es is pressed, Vc voltages
The En by E1 ..., then by Es, through loop A, C2 is powered, then now there is electricity between C1 and C2
Pressure, the electromagnet coil closure of A.C. contactor U1, Lin is connected with Lout, and Nin is connected with Nout,
C3 is connected with C4, then loop B is also switched on, and charging pile connects input power, is started working.
The operation principle of power-off protecting circuit of the invention is：
As shown in Fig. 2 input power is divided into 2 tunnels, the 1st tunnel supply Vc is used (according to actually used
Situation, it may be necessary to transformation), as long as therefore there is an electricity outside, Vc just output voltages all the time；2nd tunnel supplies
To charging pile system, this road powers and is connected on Lin and Nin.Therefore, the power supply on the 2nd tunnel is by the 1st
Road is controlled.Lout and Nout Non voltage outputs (if output voltage, then pass through during original state
Lout and Nout enter charging pile, are then charging electric vehicle).Es is normal open switch, and it act as
Activation system, can be restarted during system cut-off by pressing Es.E1, E2 ..., En is often
Make and break is closed, and also for collision detection is switched, is distributed in each position of charging pile, and effect is when charging pile is received
During to external impact, normally closed switch E1, E2 ..., En be collided so that certain or some it is normal
Close and switch off, system is fully powered-off, when being only manually pressed by Es, system can just power again, and then
Ensure that system is without electricity output during accidental impact, it is to avoid loss.
Realize that the control process of power-off protection is specifically included：When system is not actuated, A.C. contactor U1's
Electromagnet disconnects, and Lin and Lout disconnects, and Nin and Nout disconnects, and C3 and C4 disconnects, charging pile electricity
Source input non-transformer is powered, and is closed.After Es is pressed, by loop A, Vc is to U1
Low-voltage power supply end (being also the control end of A.C. contactor) C1, C2 power, A.C. contactor U1's
Electromagnet coil adhesive, Lin and Lout is connected, and Nin and Nout is connected, and C3 and C4 is connected, loop
B is also switched on, and Lout and Nout has power supply to supply, and charging pile is started working, and is charging electric vehicle.
Because Es is normal open switch, switch Es is now lifted, loop A disconnects, but loop B (i.e. Fig. 1
Middle B1->C4->C3->B2->B3->B4->C2) connect, therefore, the C1 and C2 of A.C. contactor U1
Between still there is Vc to supply, so the electromagnet of U1 is always maintained at attracting state, Lin and Lout is connected,
Nin and Nout are connected, and C3 and C4 is connected, and Lout and Nout has power supply to supply, and charging pile can be after
Continuous work.That is：After pressing Es, charging pile system is worked on power, and after hand leaves, Es can be flicked,
Now by E1 ... En, through path B1 to C4, (C3 is in and connects Vc with C4 after Es is pressed
State), C2 is finally reached by B2, B3, B4 through C3, at this moment still there is voltage between C1 and C2,
Then U1 can be worked on, and Lin is connected with Lout, and Nin is connected with Nout, and C3 is connected with C4.
When charging pile is collided in the course of the work, then collision detection can be caused to switch E1 ... En middle parts
Divide and be knocked, cause the main circuit power supply of Vc to disconnect, C1 and C2 two ends no-voltage, A.C. contactor
The electromagnet of U1 disconnects and is stopped, and Lin and Lout disconnects, and Nin and Nout disconnects, C3 and C4
Disconnect, loop A and loop B disconnect, the power input of charging pile is not turned on external electrical network input
Power supply, charging pile power-off, the complete dead electricity of system, so as to avoid further loss because of collision.
If pressing Es again, charging pile system will regain supply of electric power.
Power-off protecting circuit and its method of work for electric automobile charging pile of the invention, using general
Component, method for designing is simple, with low cost, using it is convenient, be quick on the draw, while to environmental requirement
Low, follow-up maintenance is convenient, can meet large batch of scene application, easy to utilize；Can charge
Stake disconnects input power in time when colliding, it is ensured that the reliability that charging pile is charged for electric automobile
Property and security.
The present invention can have the specific embodiment of various multi-forms, be combined by taking Fig. 1-Fig. 2 as an example above
Accompanying drawing is to technical scheme explanation for example, and it is specific that this is not meant to that the present invention is applied
Example can only be confined in specific flow or example structure, and one of ordinary skill in the art should
Understand, specific embodiment presented above is some examples in various its preferred usages, any
The implementation method for embodying the claims in the present invention all should be in technical solution of the present invention scope required for protection
Within.
Finally it should be noted that：The preferred embodiments of the present invention are the foregoing is only, is not used to
The limitation present invention, although being described in detail to the present invention with reference to the foregoing embodiments, for ability
For the technical staff in domain, it can still be repaiied to the technical scheme described in foregoing embodiments
Change, or equivalent is carried out to which part technical characteristic.It is all the spirit and principles in the present invention it
Interior, any modification, equivalent substitution and improvements made etc. should be included in protection scope of the present invention
Within.
Claims (9)
1. a kind of power-off protecting circuit for electric automobile charging pile, it is characterised in that including：
A.C. contactor U1, collision detection switch E1, E2 ... En, starting switch Es, the exchange
Power input Lin, Nin connection external electrical network input power of contactor U1, the A.C. contactor
Power output end Lout, Nout of U1 is connected with the power input of charging pile；
The low-voltage power supply end C1 of the A.C. contactor U1 pass sequentially through collision detection switch E1,
E2 ... En are connected with the power output end C4 of A.C. contactor U1；
The low-voltage power supply of the power input C3 of the A.C. contactor U1 and A.C. contactor U1
End C2 is connected；
The low-voltage power supply end C1 of the A.C. contactor U1 also pass sequentially through collision detection switch E1,
E2 ... En, starting switch Es are connected with the low-voltage power supply end C2 of A.C. contactor U1.
2. the power-off protecting circuit for electric automobile charging pile according to claim 1, its feature
It is,
Low-voltage alternating-current input power is connected between the low-voltage power supply end C1 and collision detection switch E1
Vc；
The low-voltage power supply end C1, collision detection switch E1, E2 ... En, starting switch Es, low pressure
Feeder ear C2 composition A.C. contactor current supply circuits A；
The low-voltage power supply end C1, collision detection switch E1, E2 ... En, power output end C4, electricity
Source input C3, low-voltage power supply end C2 composition A.C. contactor current supply circuit B.
3. the power-off protecting circuit for electric automobile charging pile according to claim 1 and 2, its
It is characterised by,
The starting switch Es is normal open switch, and collision detection switch E1, E2 ... En is normally closed
Switch.
4. the power-off protecting circuit for electric automobile charging pile according to claim 3, its feature
It is,
When Es is closed, A.C. contactor current supply circuit A conducting, the power input Lin with
The power output end Lout connections, the power input Nin is connected with the power output end Nout,
The power input C3 is connected with the power output end C4, the A.C. contactor current supply circuit B
Conducting, the charging pile is started working；
After Es disconnects, the A.C. contactor current supply circuit A is disconnected, and the A.C. contactor is powered back
Road B continues to turn on, and the charging pile works on.
5. the power-off protecting circuit for electric automobile charging pile according to claim 4, its feature
It is,
When any one or more disconnections in the collision detection switch E1, E2 ... En, the exchange
The contactor current supply circuit A and A.C. contactor current supply circuit B disconnects, and the charging pile is stopped；
After the collision detection switch closure for disconnecting, when the Es is closed, the A.C. contactor is powered
The loop A and A.C. contactor current supply circuit B is turned on, and the charging pile restarts work.
6. a kind of method of work of the power-off protecting circuit as described in claim 1-5 any one, its feature
It is, including：
Input power is divided into 2 tunnels, the 1st tunnel powers and supplies low-voltage alternating-current input power Vc, and the 2nd tunnel supplies
Electricity supplies charging pile by power input Lin, Nin and power output end Lout, Nout；
2nd tunnel powers to be powered by the 1st tunnel and is controlled；
When the starting switch Es is closed, the 1st tunnel is powered and the 2nd tunnel powered operation, and charging pile is connected
Input power is started working；
When the starting switch Es disconnects, the 1st tunnel powers to be powered with the 2nd tunnel and works on, charging pile
Input power is connected to work on.
7. method according to claim 6, it is characterised in that also include：
When any one or more disconnections in the collision detection switch E1, E2 ... En, the 1st tunnel supplies
Electricity and the 2nd tunnel power and disconnect, and A.C. contactor U1 is stopped, and charging pile input power disconnects, and stops
Only work；
When the starting switch Es is closed again, the 1st tunnel powers and the 2nd tunnel powered operation, described to fill
The logical input power of electric staking restarts work.
8. method according to claim 6, it is characterised in that
When the starting switch Es is closed, the A.C. contactor current supply circuit A conductings, C1 and C2
Between have voltage, the electromagnetic actuation of the A.C. contactor U1, Lin and Lout is connected, Nin with
Nout is connected, and C3 and C4 is connected, then the A.C. contactor current supply circuit B conductings, and charging pile is connected
Input power is started working；
After the starting switch Es disconnects, the A.C. contactor current supply circuit A disconnects, the exchange
Contactor current supply circuit B is turned on, and also has voltage, the electricity of the A.C. contactor U1 between C1 and C2
Magnet attraction, Lin and Lout is connected, and Nin and Nout is connected, and C3 and C4 is connected, and charging pile is connected
Input power works on.
9. method according to claim 7, it is characterised in that
When any one or more disconnections in the collision detection switch E1, E2 ... En, the exchange
Contactor current supply circuit A disconnects, and the A.C. contactor current supply circuit B disconnects, the A.C. contactor
The electromagnet of U1 disconnects, and Lin and Lout disconnects, and Nin and Nout disconnects, and C3 and C4 disconnects, and charges
Stake input power disconnects, and is stopped；
When the starting switch Es is closed again, the A.C. contactor current supply circuit A conductings, C1
There is voltage and C2 between, the electromagnetic actuation of the A.C. contactor U1, Lin and Lout is connected, Nin
Connected with Nout, C3 and C4 is connected, then the A.C. contactor current supply circuit B conductings, the charging
The logical input power of staking restarts work.
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| CN201510917601.3A CN106864279B (en) | 2015-12-10 | 2015-12-10 | A kind of power-off protecting circuit and its working method for electric automobile charging pile |
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