CN112677816B - Electric automobile alternating-current charging and discharging method for improving user experience - Google Patents
Electric automobile alternating-current charging and discharging method for improving user experience Download PDFInfo
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- CN112677816B CN112677816B CN202110003595.6A CN202110003595A CN112677816B CN 112677816 B CN112677816 B CN 112677816B CN 202110003595 A CN202110003595 A CN 202110003595A CN 112677816 B CN112677816 B CN 112677816B
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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
- Y02T90/14—Plug-in electric vehicles
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Abstract
A method for improving user experience of alternating current charging and discharging of an electric vehicle includes dividing a connection state of a charging gun into a full connection state, a half connection state and a non-connection state, judging the connection state of the charging gun by a battery management system after a push button on a charging plug is pressed in a charging process, controlling an electronic lock to be unlocked if the connection state of the charging gun is the non-connection state, continuously judging the connection state of the charging gun if the connection state of the charging gun is the half connection state, and controlling the electronic lock to be unlocked or continuously performing charging operation after the connection state of the charging gun is changed into the full connection state. The design not only improves the user experience and the safety performance of the vehicle, but also can prevent the accidental stop of the charging process.
Description
Technical Field
The invention belongs to the technical field of electric vehicle battery charging and discharging, and particularly relates to an electric vehicle alternating current charging and discharging method for improving user experience.
Background
At present, the charging modes of an electric vehicle mainly include direct current charging (fast charging) and alternating current charging (slow charging). Part 1 of the national standard GB/T20234.1-2015 connection device for conductive charging of electric automobiles: the general requirements state that the charging interface should have a locking function to prevent accidental disconnection during charging. According to the national standard GB/T20234.2-2015 connection device for conductive charging of electric automobiles part 2: provisions of vehicle ac charging interface structure in ac charging interface: the vehicle ac charging plug should have a mechanical locking device and the vehicle ac charging socket should have an electronic locking device. After the charging plug is completely connected with the charging socket, the mechanical locking device of the charging plug is used for ensuring the reliable connection of the charging plug and the charging socket, and the electronic locking device of the charging socket is used for ensuring that the mechanical locking device of the charging plug cannot be opened in the charging process.
The function of the vehicle control device during ac charging is usually performed by a Battery Management System (BMS) or an on-board battery charger (OBC). At present, BMS and OBC are commonly used in the process of charging management in the part 1 of the national standard GB/T18487.1-2015 electric vehicle conduction charging system: the schematic diagram of the ac charging circuit provided in fig. a.3 in the appendix a of the general requirements "determines whether the vehicle plug and the vehicle socket are completely connected by measuring the resistance between the detection point 3 and the PE. And the manufacturer generally divides the connection state judgment of the charging gun into two types: state a-the charging gun is not connected, state B-the charging gun is connected. When the resistance value between the monitoring point 3 and the PE is RC, that is, the vehicle plug is completely connected to the vehicle socket, the BMS or OBC sets the charging gun connection state to state B, and the BMS or OBC sets the charging gun connection state to state a in other cases. Before charging, if the connection state of the charging gun is state A, the BMS does not enter the charging process; if the connection state of the charging gun is changed from the state B to the state A in the charging process, the BMS immediately controls the OBC to stop charging, and the BMS or the OBC controls the electronic locking device of the vehicle AC charging socket to unlock after the charging is stopped.
Because the power that charges is lower than the power that the direct current charges for alternating current, whole charging process often can last several hours or ten hours, if the user stops to charge midway in the alternating current charging process, need press the button that stops charging on alternating current charging stake or the electric automobile, wait to charge to finish and remove electron locking function after, press down the button on the charging plug, remove mechanical locking function, then pull out the rifle that charges. However, in practical use, if a user wants to stop charging during ac charging, the user may directly press the push button on the charging plug and try to pull out the charging gun, at this time, since the electronic locking device of the charging socket is in a locked state, the mechanical locking device of the charging plug cannot be unlocked, but when the push button is pressed, the switch S3 is turned off, and the BMS or the OBC sets the connection state of the charging gun to state a, stops charging, and controls the electronic locking device to unlock. And the push-down button on the charging plug is in a pressing state at this moment, and the mechanical locking device can exert a pressure to the push rod of the electronic locking device, thereby increasing the friction force between the mechanical locking device and the electronic locking device, resulting in the electronic locking device being incapable of unlocking, and BMS or OBC can judge that the electronic lock has a fault after the electronic locking device is driven to fail to unlock for a certain number of times, stop unlocking and continue to execute the whole vehicle power-off process, resulting in the whole vehicle being incapable of pulling out the charging gun after power-off.
According to the situation, the electronic lock fault can be reported under the condition that the electronic lock of the whole vehicle is not in fault, the charging gun cannot be pulled out after the charging is stopped, the electronic locking function can be removed only through a manual operation mode, and the user experience is greatly reduced.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides an alternating current charging and discharging method for an electric vehicle, which can improve user experience and improve vehicle safety performance.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
an electric vehicle alternating current charging and discharging method for improving user experience is realized by an alternating current charging system, wherein the alternating current charging system comprises a battery management system, a vehicle-mounted charger and a vehicle control unit, the battery management system or the vehicle-mounted charger is in signal connection with an electronic lock of a charging socket, and the battery management system is in communication connection with the vehicle-mounted charger and the vehicle control unit;
the method comprises the following steps in sequence:
s1, in the charging process, after a press button on a charging plug is pressed, a battery management system judges whether the connection state of a charging gun is an unconnected state or a semi-connection state, if the connection state is the unconnected state, an electronic lock is operated before being unlocked, then the step S6 is carried out, and if the connection state is the semi-connection state, the step S2 is carried out;
s2, stopping outputting current by the vehicle-mounted charger, and then controlling to disconnect a charging relay by the battery management system;
s3, the battery management system judges whether the connection state of the charging gun is changed into an unconnected state, if so, the step S4 is carried out, and if not, the step S5 is carried out;
s4, the battery management system sends charging gun connection and disconnection fault information to the vehicle control unit, and then the step S6 is carried out;
s5, the battery management system judges whether the connection state of the charging gun is changed into a complete connection state, if so, the step S6 or the step S8 is carried out, and if not, the step S3 is returned;
s6, the battery management system or the vehicle-mounted charger controls the electronic lock to be unlocked;
s7, the battery management system judges whether the electronic lock is successfully unlocked, if so, the charging is finished, and if not, the step S6 is returned to;
and S8, the battery management system controls the charging relay to be closed, and charging is continued.
And the connection state of the charging gun is judged by measuring the resistance value between the monitoring point 3 and the PE in the alternating current charging circuit.
The judgment standard of the connection state of the charging gun is as follows:
if the resistance value between the monitoring point 3 and the PE is infinite, judging that the charging gun is in an unconnected state;
if the resistance value between the monitoring point 3 and the PE is RC + R4, the charging gun is judged to be in a semi-connection state;
if the resistance value between the monitoring point 3 and the PE is RC, the charging gun is judged to be in a complete connection state.
In the step S5, if the charging gun maintains the half-connected state for 10S, the battery management system first sends the charging gun connection abnormal fault information to the vehicle controller, and then the process goes to the step S6.
In the step S7, if the unlocking fails for three times, the battery management system first sends the abnormal fault information of the electronic lock state to the vehicle controller, and then ends the charging.
In step S1, the operation before unlocking the electronic lock refers to: firstly, the battery management system sends charging gun connection and disconnection fault information to the vehicle controller, then the vehicle-mounted charger stops outputting current, and then the battery management system controls to disconnect a charging relay.
The battery management system or the vehicle-mounted charger is connected with the electronic lock of the charging socket through a hard wire.
And the battery management system is connected with the vehicle-mounted charger and the vehicle control unit through CAN buses.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention discloses an electric vehicle alternating current charging and discharging method for improving user experience, which divides the connection state judgment of a charging gun into three types of non-connection of the charging gun, full connection of the charging gun and half-connection of the charging gun, a battery management system executes different discharging strategies according to the different connection states of the charging gun to realize the accurate management of the finishing process of alternating current charging, and the method not only effectively solves the problems of fault misstatement and gun pulling failure caused by the lack of operation when a user wants to finish charging in advance in the alternating current charging process of an electric vehicle on the premise of not changing hardware resources, improves the user experience, but also effectively avoids the problems caused by other uncontrollable factors in the finishing process of charging, improves the safety performance of the vehicle, and simultaneously, the step S8 also considers the condition that the user directly presses a pressing button on a charging plug in the alternating current charging process possibly does not want to stop charging or presses a pressing button on the charging plug not be operated by the user himself, thereby playing the role of preventing the accidental stopping of the charging process. Therefore, the invention not only improves the user experience and the safety performance of the vehicle, but also can prevent the accidental stop of the charging process.
2. According to the alternating-current charging and discharging method for the electric automobile, which is disclosed by the invention, the diagnosis of faults or phenomena such as connection disconnection of the charging gun (complete connection-disconnection or complete connection-half connection-disconnection), abnormal connection of the charging gun, abnormal state of an electronic lock and the like is realized through the change of the charging state, the accurate control of the charging state of the whole automobile is facilitated, and meanwhile, the data can be used for analyzing the reasons of the charging faults of the automobile and the use habits of users, so that a basis is provided for the further intelligent development of subsequent products. Therefore, the method and the device not only realize the diagnosis of the reason causing the stop of the charging of the vehicle, but also provide a basis for the further intelligent development of subsequent products.
Drawings
Fig. 1 is a schematic diagram of an ac charging system according to the present invention.
Fig. 2 is a control flowchart of embodiment 1 of the present invention.
Fig. 3 is a control flowchart of embodiment 2 of the present invention.
In the figure, a battery management system 1, a vehicle-mounted charger 2 and a vehicle control unit 3 are shown.
Detailed Description
The invention is described in further detail below with reference to the figures and the detailed description of the invention.
Referring to fig. 1-3, an electric vehicle ac charging and discharging method for improving user experience is implemented by an ac charging system, where the ac charging system includes a battery management system 1, a vehicle-mounted charger 2, and a vehicle control unit 3, the battery management system 1 or the vehicle-mounted charger 2 is in signal connection with an electronic lock of a charging socket, and the battery management system 1 is in communication connection with the vehicle-mounted charger 2 and the vehicle control unit 3;
the method comprises the following steps in sequence:
s1, in the charging process, after a press button on a charging plug is pressed, a battery management system 1 judges whether the connection state of a charging gun is an unconnected state or a semi-connection state, if the connection state is the unconnected state, an operation before an electronic lock is unlocked is firstly carried out, then the step S6 is carried out, and if the connection state is the semi-connection state, the step S2 is carried out;
s2, the vehicle-mounted charger 2 stops outputting current, and then the battery management system 1 controls to disconnect a charging relay;
s3, the battery management system 1 judges whether the connection state of the charging gun is changed into an unconnected state, if so, the step S4 is carried out, and if not, the step S5 is carried out;
s4, the battery management system 1 sends charging gun connection disconnection fault information to the vehicle control unit 3, and then the step S6 is carried out;
s5, the battery management system 1 judges whether the connection state of the charging gun is changed into a complete connection state, if so, the step S6 or the step S8 is carried out, and if not, the step S3 is returned;
s6, the battery management system 1 or the vehicle-mounted charger 2 controls the electronic lock to unlock;
s7, the battery management system 1 judges whether the electronic lock is successfully unlocked, if so, the charging is finished, and if not, the step S6 is returned to;
and S8, the battery management system 1 controls to close the charging relay to continue charging.
The connection state of the charging gun is judged by measuring the resistance value between the monitoring point 3 and the PE in the alternating current charging circuit.
The judgment standard of the connection state of the charging gun is as follows:
if the resistance value between the monitoring point 3 and the PE is infinite, judging that the charging gun is in an unconnected state;
if the resistance value between the monitoring point 3 and the PE is RC + R4, judging that the charging gun is in a semi-connection state;
if the resistance value between the monitoring point 3 and the PE is RC, the charging gun is judged to be in a complete connection state.
In the step S5, if the charging gun maintains the half-connected state for 10S, the battery management system 1 first sends the charging gun connection abnormal fault information to the vehicle control unit 3, and then the process proceeds to step S6.
In step S7, if the three successive unlocking operations fail, the battery management system 1 first sends the vehicle control unit 3 the failure information of the abnormal state of the electronic lock, and then ends the charging operation.
In step S1, the operation before unlocking the electronic lock refers to: firstly, the battery management system 1 sends charging gun connection disconnection fault information to the vehicle control unit 3, then the vehicle-mounted charger 2 stops outputting current, and then the battery management system 1 controls to disconnect the charging relay.
The battery management system 1 or the vehicle-mounted charger 2 is connected with the electronic lock of the charging socket through a hard wire.
The battery management system 1 is connected with the vehicle-mounted charger 2 and the vehicle control unit 3 through CAN buses.
The principle of the invention is illustrated as follows:
in the alternating current charging process, if a user directly presses a press button on a charging plug and tries to pull out a charging gun, the connection state of the charging gun is half-connection of the charging gun, the electronic locking device is in a locking state, the user cannot pull out the charging gun, when the user loosens the press button on the charging plug, the connection state of the charging gun is full connection of the charging gun, at the moment, a strategy that the charging is not recovered after the press button on the charging plug is loosened can be adopted, the electronic lock is controlled to be unlocked and the charging is finished, and the user can pull out the charging gun smoothly after trying to pull out the charging gun again; if it is considered that the user directly presses the push button on the charging plug during the ac charging process may not want to stop the charging or press the push button on the charging plug is not operated by the user, a strategy of resuming the charging after releasing the push button on the charging plug may be adopted.
Example 1:
referring to fig. 1 and 2, an electric vehicle alternating current charging and discharging method for improving user experience is realized by an alternating current charging system, the alternating current charging system comprises a battery management system 1, a vehicle-mounted charger 2 and a vehicle controller 3, the battery management system 1 or the vehicle-mounted charger 2 is connected with an electronic lock of a charging socket through a hard wire, and the battery management system 1 is in communication connection with the vehicle-mounted charger 2 and the vehicle controller 3 through a CAN bus;
the method comprises the following steps in sequence:
s1, in the charging process, after a push button on a charging plug is pressed, a battery management system 1 judges whether the connection state of a charging gun is an unconnected state or a semi-connected state, if the connection state is the unconnected state, the battery management system 1 firstly sends charging gun connection disconnection fault information to a vehicle control unit 3, then an on-board charger 2 stops outputting current, the battery management system 1 controls to disconnect a charging relay, then step S6 is carried out, if the connection state is the semi-connected state, step S2 is carried out, wherein the judgment standard of the connection state of the charging gun is as follows:
if the resistance value between the monitoring point 3 and the PE is infinite, judging that the charging gun is in an unconnected state;
if the resistance value between the monitoring point 3 and the PE is RC + R4, judging that the charging gun is in a semi-connection state;
if the resistance value between the monitoring point 3 and the PE is RC, the charging gun is judged to be in a complete connection state;
s2, the vehicle-mounted charger 2 stops outputting current, and then the battery management system 1 controls to disconnect a charging relay;
s3, the battery management system 1 judges whether the connection state of the charging gun is changed into an unconnected state, if so, the step S4 is executed, and if not, the step S5 is executed;
s4, the battery management system 1 sends charging gun connection and disconnection fault information to the vehicle control unit 3, and then the step S6 is carried out;
s5, the battery management system 1 judges whether the connection state of the charging gun is changed into a complete connection state, if so, the step S6 is carried out, if not, the step S3 is carried out, if the charging gun keeps a half connection state for 10S, the battery management system 1 firstly sends abnormal charging gun connection fault information to the vehicle control unit 3, and then the step S6 is carried out;
s6, the battery management system 1 or the vehicle-mounted charger 2 controls the electronic lock to unlock;
and S7, the battery management system 1 judges whether the electronic lock is successfully unlocked, if so, the charging is finished, if not, the step S6 is returned, and if the unlocking is failed for three times, the battery management system 1 firstly sends the abnormal fault information of the state of the electronic lock to the vehicle control unit 3 and then finishes the charging.
Example 2:
referring to fig. 3, the difference from embodiment 1 is that:
in step S5, the battery management system 1 determines whether the connection state of the charging gun is changed to the complete connection state, and if so, the process proceeds to step S8;
the step S8 is as follows: the battery management system 1 controls to close the charging relay to continue charging.
Claims (8)
1. The utility model provides an electric automobile alternating current charging power-off method that improves user experience which characterized in that:
the method is realized by an alternating current charging system, the alternating current charging system comprises a battery management system (1), a vehicle-mounted charger (2) and a vehicle control unit (3), the battery management system (1) or the vehicle-mounted charger (2) is in signal connection with an electronic lock of a charging socket, and the battery management system (1) is in communication connection with the vehicle-mounted charger (2) and the vehicle control unit (3);
the method comprises the following steps in sequence:
s1, in the charging process, after a press button on a charging plug is pressed, a battery management system (1) judges whether the connection state of a charging gun is an unconnected state or a semi-connection state, if the connection state is the unconnected state, an electronic lock is operated before being unlocked, then the step S6 is carried out, and if the connection state is the semi-connection state, the step S2 is carried out;
s2, stopping the vehicle-mounted charger 2 from outputting current, and then controlling the charging relay to be disconnected by the battery management system (1);
s3, the battery management system (1) judges whether the connection state of the charging gun is changed into an unconnected state, if so, the step S4 is carried out, and if not, the step S5 is carried out;
s4, the battery management system (1) sends charging gun connection and disconnection fault information to the vehicle control unit (3), and then the step S6 is carried out;
s5, the battery management system (1) judges whether the connection state of the charging gun is changed into a complete connection state, if so, the step S6 is carried out, and if not, the step S3 is carried out;
s6, the battery management system (1) or the vehicle-mounted charger (2) controls the electronic lock to unlock;
and S7, the battery management system (1) judges whether the electronic lock is successfully unlocked, if so, the charging is finished, and if not, the step S6 is returned.
2. The method for discharging the ac charging power of the electric vehicle for improving the user experience of claim 1, wherein: the connection state of the charging gun is judged by measuring the resistance value between the monitoring point 3 and the PE in the alternating current charging circuit.
3. The method for discharging the ac charging power of the electric vehicle for improving the user experience of claim 2, wherein:
the judgment standard of the connection state of the charging gun is as follows:
if the resistance value between the monitoring point 3 and the PE is infinite, judging that the charging gun is in an unconnected state;
if the resistance value between the monitoring point 3 and the PE is RC + R4, judging that the charging gun is in a semi-connection state;
if the resistance value between the monitoring point 3 and the PE is RC, the charging gun is judged to be in a complete connection state.
4. The method for charging and discharging the electric vehicle by alternating current for improving the user experience according to any one of claims 1 to 3, characterized in that: in the step S5, if the charging gun maintains the half-connected state for 10S, the battery management system (1) first transmits charging gun connection abnormality fault information to the vehicle control unit (3), and then the process proceeds to a step S6.
5. The method for discharging the AC charge of the electric automobile for improving the user experience according to any one of claims 1 to 3, wherein: in the step S7, if the three successive times of unlocking fails, the battery management system (1) first sends the information of the abnormal fault of the state of the electronic lock to the vehicle control unit (3), and then ends the charging.
6. The method for charging and discharging the electric vehicle by alternating current for improving the user experience according to any one of claims 1 to 3, characterized in that:
in step S1, the operation before unlocking the electronic lock refers to: firstly, the battery management system (1) sends charging gun connection and disconnection fault information to the vehicle control unit (3), then the vehicle-mounted charger (2) stops outputting current, and then the battery management system (1) controls to disconnect a charging relay.
7. The method for charging and discharging the electric vehicle by alternating current for improving the user experience according to any one of claims 1 to 3, characterized in that: the battery management system (1) or the vehicle-mounted charger (2) is connected with the electronic lock of the charging socket through a hard wire.
8. The method for charging and discharging the electric vehicle by alternating current for improving the user experience according to any one of claims 1 to 3, characterized in that: the battery management system (1) is connected with the vehicle-mounted charger (2) and the vehicle control unit (3) through the CAN bus.
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| JP2012243453A (en) * | 2011-05-17 | 2012-12-10 | Fujikura Ltd | Power feed connector |
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