CN108001270A - A kind of detection method of DC charging circuit and DC charging - Google Patents
A kind of detection method of DC charging circuit and DC charging Download PDFInfo
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- CN108001270A CN108001270A CN201711237231.4A CN201711237231A CN108001270A CN 108001270 A CN108001270 A CN 108001270A CN 201711237231 A CN201711237231 A CN 201711237231A CN 108001270 A CN108001270 A CN 108001270A
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- 238000001514 detection method Methods 0.000 title claims abstract description 57
- 238000012360 testing method Methods 0.000 claims abstract description 77
- 238000000034 method Methods 0.000 claims abstract description 19
- 230000001681 protective effect Effects 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000007257 malfunction Effects 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 10
- 206010014357 Electric shock Diseases 0.000 abstract description 8
- 230000005611 electricity Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
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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
- B60L53/20—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 characterised by converters located in the vehicle
-
- H02J7/0086—
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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
-
- 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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
-
- 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
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for 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
- 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
- Y02T90/14—Plug-in electric vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention provides a kind of detection method of DC charging circuit and DC charging, wherein, DC charging circuit, including：Charge controller；DC/DC converters, are connected with battery pack and the charge controller respectively, for the output voltage of the battery pack to be converted to supply voltage, power for the charge controller；Detection circuit, the detection circuit are provided with detection resistance, and the first end of the detection resistance connects the output terminal of the DC/DC converters, and the second end connection charging connection of the detection resistance confirms end to form the test point of the detection circuit；The charge controller is connected with the test point, for detecting the test point magnitude of voltage of the test point.The present invention can effectively distinguish PE contacts and be disconnected for normal connection or connection, so as to effectively avoid the high pressure electric shock risk in charging process.
Description
Technical field
The present invention relates to automobile technical field, particularly relates to a kind of detection method of DC charging circuit and DC charging.
Background technology
B.3.5 middle regulation in national standard GBT18487.1-2015, during charging (fast charge), automobile should be able to detect PE
(Protective Earthing, protective grounding) pin is with the presence or absence of disconnection problem (because the charge connector terminal of charging pile occurs
Problem, causes the PE lines at car end and stake end can not connect).
For the electric automobile of 12V voltage platforms, the test point recommended in application national standard GBT18487.1-2015
During 2 11.2~12.8V of voltage range (can voluntarily configure), automobile and fast charge stake before PE pins disconnect and disconnect in charging process
Afterwards, 2 voltage of test point is in 6V or so, and 1 voltage of stake test point is in 4V or so, and therefore, 1 voltage of test point is before the disconnection of PE pins
Rear voltage overlaps that scope is larger, and same 2 voltage of test point in PE pins disconnects front and rear voltage, and to overlap scope larger, automobile and fills
Electric stake all can not effectively distinguish PE broken needle situations.And in charging process, Insulation monitoring is performed by vehicle, after PE broken needles, insulation inspection
Whole charge circuit (charging pile side Insulation monitoring less than) can not covered by surveying, if occurring Insulation Problems at this time, because detection is failed,
It can not then be required according to the fault definition of national regulations, disconnect high-voltage electricity to protect user of service, there are electric shock risk.
To sum up, in the prior art, PE broken needles can not be effectively detected during straight fill, so as to cause to exist in charging process
High pressure electric shock risk.
The content of the invention
The technical problem to be solved in the present invention is to provide the detection method of a kind of DC charging circuit and DC charging, with solution
PE broken needles can not be effectively certainly detected during straight fill in the prior art, cause asking there are high pressure electric shock risk in charging process
Topic.
In order to solve the above-mentioned technical problem, the present invention is realized in：
In a first aspect, the embodiment of the present invention provides a kind of DC charging circuit, including：
Charge controller；
DC/DC converters, are connected with battery pack and the charge controller respectively, for the output of the battery pack is electric
Pressure is converted to supply voltage, powers for the charge controller；
Detection circuit, the detection circuit are provided with detection resistance, and the first end of the detection resistance connects the DC/DC
The output terminal of converter, the second end connection charging connection of the detection resistance confirm end to form the detection of the detection circuit
Point；The charge controller is connected with the test point, for detecting the test point magnitude of voltage of the test point.
Wherein, the charge controller includes voltage checking chip, and the voltage checking chip connects the test point, uses
In the test point magnitude of voltage for detecting the test point.
Wherein, the detection circuit is arranged in the charge controller.
Wherein, the first end of the detection resistance connects the cathode output end of the DC/DC converters.
Wherein, the charge controller is battery management system BMS or entire car controller VCU.
Second aspect, the embodiment of the present invention provides a kind of detection method of DC charging, applied to above-mentioned DC charging
Circuit, the described method includes：
When electric automobile is connected with charging equipment and carries out DC charging, the test point magnitude of voltage of test point is detected；
By the test point magnitude of voltage compared with a preset voltage value, if the test point magnitude of voltage is more than predeterminated voltage
Value, then send charge completion signal to the charging equipment.
Wherein, it is described by the test point magnitude of voltage compared with a preset voltage value, if the test point magnitude of voltage is more than
Preset voltage value, then to the charging equipment send charge completion signal the step of, further include：
While sending charge completion signal to the charging equipment, send protective grounding contact to the charging equipment and connect
Contact failure information.
Wherein, the preset voltage value is 7.5V.
Wherein, if the test point magnitude of voltage is more than preset voltage value, charging knot is sent to the charging equipment
The step of beam signal, further include：
While sending charge completion signal to the charging equipment, sent to the sound prompt device of the electric automobile
Alarm signal, makes the sound prompt device send warning sound.
Wherein, if the test point magnitude of voltage is more than preset voltage value, charging knot is sent to the charging equipment
The step of beam signal, further include：
While sending charge completion signal to the charging equipment, malfunction coefficient is sent to the instrument of the electric automobile
Signal, makes the instrument show protective grounding contact fault message.
In the embodiment of the present invention, it can effectively distinguish PE contacts and be disconnected for normal connection or connection, so as to effectively keep away
Exempt from the high pressure electric shock risk in charging process.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, needed in being described below to the embodiment of the present invention
Attached drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention,
For those of ordinary skill in the art, without having to pay creative labor, can also be obtained according to these attached drawings
Obtain other attached drawings.
Fig. 1 shows the structure diagram of DC charging circuit provided in an embodiment of the present invention；
Fig. 2 represents one of schematic equivalent circuit of detection circuit of the embodiment of the present invention；
Fig. 3 represents the two of the schematic equivalent circuit of the detection circuit of the embodiment of the present invention；
Fig. 4 represents the flow diagram of the detection method of DC charging provided in an embodiment of the present invention.
Embodiment
To make the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
Fig. 1 is referred to, it is illustrated that the structure diagram of DC charging circuit provided in an embodiment of the present invention.Wherein,
In Fig. 1, DC+, DC- represent the power terminal of DC charging；S+, S- represent signal of communication；CC1, CC2 represent charging equipment respectively
Connection confirmation signal connects confirmation signal with vehicle；A+, A- are low pressure accessory power supply；PE represents protective grounding terminal.
The embodiment of the present invention provides a kind of DC charging circuit, can include：
Charge controller 13；
DC/DC converters 12, are connected with battery pack 11 and the charge controller 13 respectively, for by the battery pack 11
Output voltage be converted to supply voltage, power for the charge controller 13；
Detection circuit, the detection circuit are provided with described in the first end connection of detection resistance R5, the detection resistance R5
The output terminal of DC/DC converters 12, the second end connection charging connection of the detection resistance R5 confirm end to form the detection
The test point of circuit；The charge controller 13 is connected with the test point, for detecting the test point voltage of the test point
Value.
In the embodiment of the present invention, electric automobile is connected by charging interface with charging equipment carries out DC charging, battery pack
11 receive charge power supply and export to DC/DC converters 12, and DC/DC converters 12 receive the output voltage of battery pack 11 and turn
It is changed to supply voltage to export respectively to storage battery 14 and charge controller 13, which is 12V storage batteries；Wherein, detection electricity
Road is connected to the connecting pin of charge controller and DC/DC converters 12, the first end of detection resistance R5 is connected the DC/DC conversions
The output terminal of device 12, the i.e. detection circuit directly by DC/DC converters 12 output terminal power, the DC/DC converters 12 it is defeated
Go out voltage as automotive check point source U2；The second end connection charging connection of detection resistance R5 confirms end to form detection circuit
Test point, i.e. test point 2 in Fig. 1, here, the charged connection of second end of detection resistance R5 confirm that end is connected with resistance R3
It is followed by protective grounding terminal；In addition, as shown in Figure 1, in charging equipment, mono- ends of resistance R1 are connected to charging equipment detection point source
U1, the other end are connected to resistance R2 and resistance R4 to form test point 1 respectively, and wherein resistance R2 and resistance R4 parallel connections are followed by protection
Ground terminal.
Wherein, in the embodiment of the present invention, the first end of the detection resistance connects the cathode output of the DC/DC converters
End.
In the embodiment of the present invention, in normal charging process, PE contact portions are normal at this time, the equivalent electric of the detection circuit
Road, can be by automobile since automotive check point source U2 is powered by the output terminal of DC/DC converters 12 as shown in Fig. 2, at this time
The voltage increase of point source U2 is detected to (14 ± 0.25) V (it is 0.25V that the voltage of DC/DC converters 12, which controls error), then
13.75V≤U2≤14.25V, 11.2V≤U1≤12.8V, resistance R1, resistance R2, resistance R3, resistance R4 and detection resistance R5
Resistance value is (1000 ± 30) Ω.Therefore, according to Fig. 2 equivalent circuit circuit connecting relation, the inspection of test point 2 can be obtained
Measuring point magnitude of voltage is U2*R3/ (R5+R3), and the test point range of voltage values of test point 2 is 6.66~7.34V.
And when PE contact portions disconnect (failure), the equivalent circuit of the detection circuit is as shown in figure 3, at this time, according to Fig. 3
The circuit connecting relation of shown equivalent circuit, wherein, I1 is the electric current for flowing through resistance R3, resistance R4 and detection resistance R5, and I2 is
The electric current of resistance R1 is flowed through, I3 is the electric current for flowing through resistance R2, can be obtained：
U1=I2*R1+R2*I3；
U2=I1* (R3+R4+R5)-R2*I3；
I2=I1+I3；
Test point magnitude of voltage=U2-I1*R5 of test point 2；
Then being derived according to above-mentioned formula to obtain：The test point magnitude of voltage of test point 2=
U2-R5*(U1*(R1+R2)+R2*U1)/((R2+R3+R4+R5)*(R1+R2)-R2*R2)；
Then the test point range of voltage values of test point 2 is 7.71~8.84V.
Wherein, in the embodiment of the present invention, which is used to be connected and carry out with charging equipment in electric automobile
During DC charging, the test point magnitude of voltage of detection test point (i.e. test point 2)；It is and the test point magnitude of voltage and one is default electric
Pressure value compares, if the test point magnitude of voltage is more than preset voltage value, charge completion signal is sent to the charging equipment, with
Make charging equipment complete charge.Therefore, in the embodiment of the present invention, test point (i.e. test point 2) is detected by charge controller
Test point magnitude of voltage, can effectively distinguish PE contacts and be disconnected for normal connection or connection, so as to effectively avoid charging process
In high pressure electric shock risk.
Furthermore, it is contemplated that common voltage detecting deviation is 0.1V, therefore, in the embodiment of the present invention, preset voltage value can
Think 7.5V.
In addition, understanding corresponding fault message when stopping and charging for ease of charging equipment, charge controller 13 can also be used
While charging equipment described in Yu Xiang sends charge completion signal, the event of protective grounding contact is sent to the charging equipment
Hinder information.
In addition, while charge controller 13 be can be also used for charging equipment transmission charge completion signal, to institute
The sound prompt device for stating electric automobile sends alarm signal, the sound prompt device is sent warning sound.
In addition, while charge controller 13 be can be also used for charging equipment transmission charge completion signal, to institute
The instrument for stating electric automobile sends fault display signal, the instrument is shown protective grounding contact fault message.
Wherein, in the embodiment of the present invention, the charge controller 13 can include voltage checking chip 131, the voltage
Detection chip 131 connects the test point, for detecting the test point magnitude of voltage of the test point.
Wherein, the detection circuit is arranged in the charge controller 13.
Wherein, the charge controller 13 for battery management system (Battery Management System, BMS) or
Entire car controller (Vehicle Control Unit, VCU).
In addition, referring to Fig. 4, it is illustrated that the flow of the detection method of DC charging provided in an embodiment of the present invention is shown
It is intended to, the embodiment of the present invention also provides a kind of detection method of DC charging, applied to above-mentioned DC charging circuit, the side
Method may comprise steps of：
Step 401, when electric automobile is connected with charging equipment and carries out DC charging, the test point electricity of test point is detected
Pressure value；
Step 402, by the test point magnitude of voltage compared with a preset voltage value, if the test point magnitude of voltage is more than in advance
If magnitude of voltage, then charge completion signal is sent to the charging equipment.
In the embodiment of the present invention, by by the test point magnitude of voltage of test point (i.e. test point 2) compared with preset voltage value,
If test point magnitude of voltage is more than preset voltage value, represent that PE contact portions disconnect (failure), then send charging knot to charging equipment
Beam signal, so that charging equipment stops charging, can avoid the high pressure electric shock risk in charging process.
Wherein, step 402, it is described by the test point magnitude of voltage compared with a preset voltage value, if the test point is electric
Pressure value is more than preset voltage value, then to the charging equipment send charge completion signal the step of, can also include：Filled to described
While electric equipment sends charge completion signal, protective grounding contact fault message is sent to the charging equipment.In this way,
Charging equipment can be easy to understand corresponding fault message when stopping charging.
Wherein, the preset voltage value can be 7.5V.
Wherein, step 402, if the test point magnitude of voltage is more than preset voltage value, sent out to the charging equipment
The step of sending charge completion signal, can also include：While sending charge completion signal to the charging equipment, to the electricity
The sound prompt device of electrical automobile sends alarm signal, the sound prompt device is sent warning sound.
Wherein, step 402, if the test point magnitude of voltage is more than preset voltage value, sent out to the charging equipment
The step of sending charge completion signal, can also include：While sending charge completion signal to the charging equipment, to the electricity
The instrument of electrical automobile sends fault display signal, the instrument is shown protective grounding contact fault message.
The embodiment of the present invention can effectively distinguish PE contacts and be disconnected for normal connection or connection, so as to effectively avoid filling
High pressure electric shock risk in electric process.
For foregoing embodiment of the method, in order to be briefly described, therefore it is all expressed as to a series of combination of actions, still
Those skilled in the art should know, the present invention and from the limitation of described sequence of movement, because according to the present invention, it is some
Step can use other orders or be carried out at the same time.Secondly, those skilled in the art should also know, described in the specification
Embodiment belong to preferred embodiment, involved action is not necessarily essential to the invention.
It should be noted that in inventive embodiments, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or order.
The unit illustrated as separating component may or may not be physically separate, be shown as unit
The component shown may or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
In network unit.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units integrate in a unit.
If the function is realized in the form of SFU software functional unit and is used as independent production marketing or in use, can be with
It is stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially in other words
The part to contribute to the prior art or the part of the technical solution can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be
People's computer, server, or network equipment etc.) perform all or part of step of each embodiment the method for the present invention.
And foregoing storage medium includes：USB flash disk, mobile hard disk, ROM, RAM, magnetic disc or CD etc. are various can be with store program codes
Medium.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
- A kind of 1. DC charging circuit, it is characterised in that including：Charge controller；DC/DC converters, are connected with battery pack and the charge controller respectively, for the output voltage of the battery pack to be turned Supply voltage is changed to, is powered for the charge controller；Detection circuit, the detection circuit are provided with detection resistance, and the first end of the detection resistance connects the DC/DC conversions The output terminal of device, the second end connection charging connection of the detection resistance confirm end to form the test point of the detection circuit； The charge controller is connected with the test point, for detecting the test point magnitude of voltage of the test point.
- 2. DC charging circuit according to claim 1, it is characterised in that the charge controller includes voltage detecting core Piece, the voltage checking chip connects the test point, for detecting the test point magnitude of voltage of the test point.
- 3. DC charging circuit according to claim 1, it is characterised in that the detection circuit is arranged at the charging control In device processed.
- 4. DC charging circuit according to claim 1, it is characterised in that described in the first end connection of the detection resistance The cathode output end of DC/DC converters.
- 5. DC charging circuit according to claim 1, it is characterised in that the charge controller is battery management system BMS or entire car controller VCU.
- 6. a kind of detection method of DC charging, applied to such as claim 1 to 5 any one of them DC charging circuit, its It is characterized in that, the described method includes：When electric automobile is connected with charging equipment and carries out DC charging, the test point magnitude of voltage of test point is detected；By the test point magnitude of voltage compared with a preset voltage value, if the test point magnitude of voltage is more than preset voltage value, Charge completion signal is sent to the charging equipment.
- It is 7. according to the method described in claim 6, it is characterized in that, described by the test point magnitude of voltage and a preset voltage value Compare, if the test point magnitude of voltage is more than preset voltage value, to the charging equipment send charge completion signal the step of, Further include：While sending charge completion signal to the charging equipment, the event of protective grounding contact is sent to the charging equipment Hinder information.
- 8. according to the method described in claim 6, it is characterized in that, the preset voltage value is 7.5V.
- 9. if according to the method described in claim 6, it is characterized in that, the test point magnitude of voltage is more than predeterminated voltage The step of being worth, then sending charge completion signal to the charging equipment, further include：While sending charge completion signal to the charging equipment, alarm is sent to the sound prompt device of the electric automobile Signal, makes the sound prompt device send warning sound.
- 10. if according to the method described in claim 6, it is characterized in that, the test point magnitude of voltage is more than predeterminated voltage The step of being worth, then sending charge completion signal to the charging equipment, further include：While sending charge completion signal to the charging equipment, malfunction coefficient letter is sent to the instrument of the electric automobile Number, the instrument is shown protective grounding contact fault message.
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| CN201711237231.4A CN108001270B (en) | 2017-11-30 | 2017-11-30 | Direct current charging circuit and direct current charging detection method |
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Cited By (7)
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| CN108909492A (en) * | 2018-07-06 | 2018-11-30 | 北京新能源汽车股份有限公司 | A kind of charge-discharge system and vehicle |
| CN108973758A (en) * | 2018-08-31 | 2018-12-11 | 金华安靠电源科技有限公司 | A kind of charging recognition methods of charging system for electric automobile and electric car charging circuit |
| CN109050329A (en) * | 2018-09-14 | 2018-12-21 | 北京新能源汽车股份有限公司 | DC charging controls guidance circuit, adaptable interface circuit and charge control method |
| CN109217260A (en) * | 2018-09-27 | 2019-01-15 | 倍登新能源科技（苏州）有限公司 | Overcurrent protector for power tool battery packet |
| CN111527005A (en) * | 2018-12-04 | 2020-08-11 | 三菱电机株式会社 | Electric vehicle, charging system, and charging/discharging system |
| CN112305460A (en) * | 2020-10-22 | 2021-02-02 | 深圳来电科技有限公司 | On-off detection circuit and on-off detection method for charging wire of mobile power supply |
| CN114113833A (en) * | 2021-11-11 | 2022-03-01 | 阳光电源股份有限公司 | Charging pile and charging pile line detection method and device |
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