CN116834599B - New energy automobile integrated fast and slow charging control system and method - Google Patents
New energy automobile integrated fast and slow charging control system and method Download PDFInfo
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- CN116834599B CN116834599B CN202311075736.0A CN202311075736A CN116834599B CN 116834599 B CN116834599 B CN 116834599B CN 202311075736 A CN202311075736 A CN 202311075736A CN 116834599 B CN116834599 B CN 116834599B
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- 238000004891 communication Methods 0.000 claims description 8
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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
- B60L53/60—Monitoring or controlling charging stations
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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
- B60L53/10—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 the energy transfer between the charging station and the vehicle
- B60L53/14—Conductive energy transfer
- B60L53/16—Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a new energy automobile integrated fast and slow charging control system and method, and relates to the technical field of fast and slow charging control. The system includes an integrated charging socket, OBC, PDU, VCU and BMS; the OBC determines that the new energy automobile needs to be charged slowly or quickly according to the PWM duty ratio signal, and the PDU closes or opens a slow charging relay or a quick charging relay in the PDU according to the determination result; the OBC outputs voltage and current to the power battery according to the slow charging permission current message and the slow charging permission voltage message generated by the BMS, and the new energy automobile carries out slow charging; and the BMS generates a message for allowing quick charge to wake up the quick charge pile according to the determination result, and the new energy automobile carries out quick charge. The invention realizes that a single integrated charging socket can perform direct-current quick charging and alternating-current slow charging, and ensures that the whole vehicle charging process has uniformity.
Description
Technical Field
The invention relates to the technical field of fast and slow charging control, in particular to a new energy automobile integrated fast and slow charging control system and method.
Background
In the development of the current automobile industry, the market occupation of new energy automobiles is more and more heavy, the charging mode of the current new energy automobiles mainly comprises an alternating current charging mode and a direct current charging mode, an alternating current charging seat and a direct current charging seat are required to be arranged on the whole automobile at the same time, and a charging control method comprises an alternating current charging mode and a direct current charging mode, so that the current charging method has no uniformity, and the problems of complex whole automobile charging process, difficult whole automobile arrangement, increased whole automobile cost, difficult user identification and the like are caused.
Disclosure of Invention
In order to solve the problems, the invention provides a system and a method for controlling the integrated fast and slow charging of a new energy automobile, which are used for realizing two charging modes of direct current fast charging and alternating current slow charging through an integrated charging socket.
In order to achieve the above object, the present invention provides the following solutions:
a new energy automobile integrated fast and slow charging control system, the control system includes:
the integrated charging socket is used for receiving and outputting a charging connection signal, a PWM duty cycle signal and a CAN signal;
the OBC is connected with the integrated charging socket and is used for determining whether the new energy automobile needs to be charged slowly or rapidly according to the PWM duty ratio signal; when the determination result shows that the new energy automobile needs to be charged slowly, the OBC detects whether the alternating voltage of the slow charging pile is normal, and when the detection result shows that the alternating voltage is normal, the OBC sends a slow charging request message;
the PDU is connected with the OBC and is used for closing or opening a slow charging relay or a fast charging relay in the PDU according to a determination result;
the VCU is connected with the OBC and used for detecting whether the new energy automobile has faults or not according to the request slow charge message, and when the new energy automobile has no faults, the VCU sends out a command for allowing the slow charge message;
BMS, which is connected with the OBC and the VCU respectively and is used for sending a message for allowing slow charging current and a message for allowing slow charging voltage to the OBC according to the instruction for allowing slow charging; the method is also used for sending a message for allowing quick charging to the quick charging pile when the determination result indicates that the new energy automobile needs quick charging;
the OBC outputs voltage and current to the power battery according to the message of allowing slow charging current and the message of allowing slow charging voltage, the slow charging pile outputs electric energy, and the new energy automobile carries out slow charging;
the BMS wakes up the quick fill stake through allow quick fill message, quick fill stake with BMS passes through CAN signal interaction quick fill information, if quick fill stake with BMS communication is successful then quick fill stake is according to quick fill information output electric energy, new energy automobile fills soon.
Optionally, the OBC is further configured to perform self-checking according to the PWM duty cycle signal, and when a self-checking result indicates that the OBC has no fault, the OBC determines whether to wake up the VCU and the BMS according to the charging connection signal and the PWM duty cycle signal.
Optionally, when the charging connection signal is normal and the duty cycle range of the PWM duty cycle signal is greater than or equal to 10% and less than or equal to 97%, the output hard wire of the OBC determines to wake up the VCU and the BMS; otherwise, stopping the charge control.
Optionally, when the duty cycle range of the PWM duty cycle signal is greater than or equal to 10% and less than or equal to 90%, the OBC determines that the new energy automobile needs to be charged slowly; when the duty ratio range of the PWM duty ratio signal is greater than 90% and less than or equal to 97%, the OBC determines that the new energy automobile needs to be charged quickly.
Optionally, when the determined result indicates that the new energy automobile needs to be charged slowly, the slow charging relay is closed, and the fast charging relay is opened; when the determined result indicates that the new energy automobile needs to be charged quickly, the quick charging relay is closed, and the slow charging charger is opened.
Optionally, the integrated charging socket comprises a YY1 interface, a YY2 interface, a direct current positive electrode dc+, a direct current negative electrode DC-, a ground wire PE, a first alternating current live wire interface L1, a second alternating current live wire interface L2, a third alternating current live wire interface L3, a zero line interface N, X + interface and an X-interface;
the YY1 interface is used for receiving and outputting the charging connection signal, the YY2 interface is used for receiving and outputting the PWM duty cycle signal, and the X+ interface and the X-interface are both used for receiving and outputting the CAN signal; the direct current positive electrode DC+, the direct current negative electrode DC-and the ground wire PE are used for quick charging of the new energy automobile; the first alternating-current live wire interface L1, the second alternating-current live wire interface L2, the third alternating-current live wire interface L3 and the zero line interface N are used for the new energy automobile to carry out slow charging;
the YY1 interface and the YY2 interface are connected with the OBC; the direct current positive electrode DC+, the direct current negative electrode DC-, the ground wire PE, the first alternating current live wire interface L1, the second alternating current live wire interface L2, the third alternating current live wire interface L3 and the zero line interface N are all connected with the PDU;
the X+ interface and the X-interface are both connected with the BMS.
The control method is applied to the new energy automobile integrated fast and slow charging control system, and comprises the following steps:
the OBC determines that the new energy automobile needs to be charged slowly or rapidly according to the PWM duty ratio signal;
when the new energy automobile is determined to be required to be charged slowly, a slow charging relay in the PDU is closed, and a fast charging relay is opened; when the new energy automobile is determined to need to be charged quickly, a quick charging relay in the PDU is closed, and a slow charging relay is opened;
when the slow charging relay is closed and the fast charging relay is opened, the OBC detects whether the alternating voltage is normal, if the alternating voltage is normal, the OBC sends a request slow charging message to the VCU, otherwise, the charging control is stopped;
after the VCU receives the request slow charging message, detecting whether the new energy automobile has a fault or not, and if not, sending a command for allowing the slow charging message to the BMS by the VCU;
the BMS sends a message for allowing slow charging current and a message for allowing slow charging voltage to the OBC according to the instruction for allowing slow charging;
the OBC outputs voltage or current to the power battery according to the message of allowing slow charging current and the message of allowing slow charging voltage, the slow charging pile outputs electric energy, and the new energy automobile carries out slow charging;
when the fast charging relay is closed and the slow charging relay is opened, the BMS sends a message allowing fast charging to wake up the fast charging pile to the fast charging pile;
the quick charging pile and the BMS are in communication with each other through CAN signals to perform quick charging information, if the quick charging pile and the BMS are in communication success, the quick charging pile outputs electric energy, the new energy automobile is subjected to quick charging, and otherwise, charging control is stopped.
Optionally, before the OBC determines that the new energy automobile needs to be charged slowly or quickly according to the PWM duty cycle signal, the method further includes:
the OBC receives the PWM duty cycle signal and then carries out self-detection;
if the OBC self-test is fault-free, detecting whether a charging connection signal and the PWM duty cycle signal are normal, and if the OBC self-test is fault, stopping charging control;
when the OBC self-check is fault-free, the charging connection signal is normal, and the duty cycle range of the PWM duty cycle signal is more than or equal to 10% and less than or equal to 97%, the output hard wire of the OBC wakes up the VCU and the BMS.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
according to the integrated fast and slow charging control system and method for the new energy automobile, only the integral charging socket is needed, the new energy automobile is judged to need to be charged slowly or quickly through the PWM duty ratio signal, and the OBC is used for switching on or switching off the slow charging relay and the fast charging relay in the PDU according to different charging requirements of the new energy automobile, so that the new energy automobile is correspondingly charged slowly or fast. The invention realizes that a single integrated charging socket can perform direct-current quick charging and alternating-current slow charging, so that the whole vehicle charging process has uniformity; the method has the advantages of reduced components of the whole vehicle, simple whole vehicle arrangement, saving of whole vehicle cost, unified and simple charging control method, improved charging efficiency and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an integrated fast and slow charging control system for a new energy automobile according to an embodiment of the present invention;
fig. 2 is an interface schematic diagram of an integrated charging socket according to a first embodiment of the present invention;
fig. 3 is a schematic flow chart of a new energy automobile integrated fast and slow charging control method according to a second embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a new energy automobile integrated fast and slow charging control system and method, which can carry out direct-current fast charging and alternating-current slow charging through a single integrated charging socket, so that the whole automobile charging process has uniformity.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
In a first embodiment, as shown in fig. 1, the first embodiment of the present invention provides a new energy automobile integrated fast and slow charging control system, which includes an integral charging socket 1, an OBC2 (OBC is a charger), a PDU3 (PDU is a high-voltage distribution box), a VCU4 (VCU is a complete vehicle controller), and a BMS5 (BMS is a battery management system).
The integrated charging socket 1 is used for receiving and outputting a charging connection signal, a PWM duty cycle signal and a CAN signal.
Further, as shown in fig. 2, the integrated charging socket 1 includes a YY1 interface, a YY2 interface, a direct current positive electrode dc+, a direct current negative electrode DC-, a ground line PE, a first alternating current live wire interface L1, a second alternating current live wire interface L2, a third alternating current live wire interface L3, a neutral wire interface N, X + interface, and an X-interface. The YY1 interface is used for receiving and outputting a charging connection signal, the YY2 interface is used for receiving and outputting a PWM duty ratio signal, and the X+ interface and the X-interface are both used for receiving and outputting a CAN signal; the direct current positive electrode DC+, the direct current negative electrode DC-and the ground wire PE are used for quick charging of the new energy automobile; the first alternating-current live wire interface L1, the second alternating-current live wire interface L2, the third alternating-current live wire interface L3 and the zero line interface N are used for slowly charging the new energy automobile. The YY1 interface and the YY2 interface are connected with the OBC 2; the direct current positive electrode DC+, the direct current negative electrode DC-, the ground wire PE, the first alternating current live wire interface L1, the second alternating current live wire interface L2, the third alternating current live wire interface L3 and the zero line interface N are all connected with the PDU 3; the x+ interface and the X-interface are both connected with the BMS5.
The OBC2 is connected with the integrated charging socket 1 and is used for determining whether the new energy automobile needs to be charged slowly or rapidly according to the PWM duty ratio signal; when the determination result shows that the new energy automobile needs to be charged slowly, the OBC2 detects whether the alternating current voltage of the slow charging pile is normal or not, the alternating current voltage of the slow charging pile is normal when 90V-265V, and when the detection result shows that the alternating current voltage is normal, the OBC2 sends out a slow charging request message. When the duty ratio range of the PWM duty ratio signal is more than or equal to 10% and less than or equal to 90%, the OBC2 determines that the new energy automobile needs to be charged slowly; when the duty ratio range of the PWM duty ratio signal is greater than 90% and less than or equal to 97%, the OBC2 determines that the new energy vehicle needs to be charged quickly.
Further, the OBC2 is further configured to perform self-checking according to the PWM duty cycle signal, and when the self-checking result indicates that the OBC2 has no fault, the OBC2 determines whether to wake up the VCU4 and the BMS5 according to the charging connection signal and the PWM duty cycle signal. When the charging connection signal is normal (the voltage of the YY1 interface is changed from 12V to 6V to be normal) and the duty ratio range of the PWM duty ratio signal is more than or equal to 10% and less than or equal to 97%, the output hard wire of the OBC2 determines to wake up the VCU4 and the BMS5; otherwise, stopping the charge control.
The PDU3 is connected with the OBC2, and is used for closing or opening a slow charge relay or a fast charge relay in the PDU3 according to the determination result. When the determined result indicates that the new energy automobile needs to be charged slowly, the slow charging relay is closed, and the fast charging relay is opened; when the determined result indicates that the new energy automobile needs to be charged quickly, the quick charging relay is closed, and the slow charging charger is opened.
The VCU4 is connected with the OBC2 and is used for detecting whether the new energy automobile has faults or not according to the request slow-charge message, and when the new energy automobile has no faults, the VCU4 sends out a command for allowing the slow-charge message.
The BMS5 is respectively connected with the OBC2 and the VCU4 and is used for sending a message for allowing slow charging current and a message for allowing slow charging voltage to the OBC2 according to the instruction for allowing slow charging; and the method is also used for sending a message for allowing quick charge to the quick charge pile when the determination result indicates that the new energy automobile needs to be charged quickly.
And the OBC2 outputs voltage and current to the power battery according to the message allowing slow charging current and the message allowing slow charging voltage, the slow charging pile outputs electric energy, and the new energy automobile is subjected to slow charging.
BMS5 is through allowing quick fill message to wake up quick fill stake, fills stake and BMS5 through CAN signal interaction quick charge information soon, if quick fill stake and BMS5 communication are successful then quick fill stake according to quick charge information (battery request voltage, electric current and the maximum output voltage, the electric current etc. of quick fill stake), new energy automobile fills the charge soon.
The working process of the new energy automobile integrated fast and slow charging control system provided by the embodiment is as follows: the integrated charging socket 1 inputs the OBC2 that PWM duty cycle signal was awakened and is in sleep state, and OBC2 is awakened the back and carries out the self-checking, and self-checking is trouble-free and when charging connection signal and PWM duty cycle signal all normal, OBC 2's output hard wire awakens VCU4 and BMS5. After the OBC2 is awakened, the fast charging and the slow charging are distinguished according to the duty ratio range of the PWM duty ratio signal, the duty ratio range of the PWM duty ratio signal is 10-90% (including 10-90%), the OBC2 judges that the vehicle is slowly charged, the OBC2 controls the slow charging relay in the PDU3 to be closed, the fast charging relay to be opened, controls the internal S2 switch in the OBC2 to be closed, at the moment, the OBC2 detects whether the alternating-current voltage is normal or not, a request slow charging message is normally sent, the VCU4 detects whether the whole vehicle of the new energy vehicle has faults, the VCU4 sends a command for allowing the slow charging message if the whole vehicle has faults, the BMS5 sends a message for allowing the slow charging current and a message for allowing the slow charging voltage, the OBC2 receives the message sent by the BMS5, the slow charging pile outputs electric energy, and the new energy vehicle is slowly charged. The duty cycle scope that detects PWM duty cycle signal after OBC2 is awakened is 90% to 97% (wherein does not contain 90%, contains 97%), OBC2 judges to fill soon, OBC2 control fills the relay soon and closes, slow charging relay disconnection soon, BMS5 sends and allows quick filling message awakening to fill the stake soon, BMS5 and fill between the stake soon through CAN signal interaction fast, wherein fill information soon and include battery request voltage, electric current and the maximum output voltage of filling the stake soon, electric current etc. fast fills stake and BMS5 successful communication, fill the stake output electric energy soon, new energy automobile fills soon this moment.
In a second embodiment, the invention provides a new energy automobile integrated fast and slow charging control method aiming at the new energy automobile integrated fast and slow charging control system provided in the first embodiment.
As shown in fig. 3, the control method includes: step 1: and the OBC2 determines that the new energy automobile needs to be charged slowly or quickly according to the PWM duty ratio signal.
Step 2: when the new energy automobile is determined to be required to be charged slowly, a slow charging relay in the PDU3 is closed, and a fast charging relay is opened; when the new energy automobile is determined to need to be charged quickly, a quick charging relay in PDU3 is closed, and a slow charging relay is opened.
Step 3: when the slow charging relay is closed and the fast charging relay is opened, the OBC2 detects whether the alternating voltage is normal, if the alternating voltage is normal, the OBC2 sends a request slow charging message to the VCU4, otherwise, the charging control is stopped.
Step 4: after receiving the request slow charge message, the VCU4 detects whether the new energy automobile has a fault, and if not, the VCU4 sends an instruction for allowing the slow charge message to the BMS5.
Step 5: and the BMS5 sends a message for allowing slow charging current and a message for allowing slow charging voltage to the OBC2 according to the instruction for allowing the slow charging.
Step 6: and the OBC2 outputs voltage or current to the power battery according to the message of allowing slow charging current and the message of allowing slow charging voltage, and the slow charging pile outputs electric energy for the new energy automobile to carry out slow charging.
Step 7: when the fast charging relay is closed and the slow charging relay is opened, the BMS5 sends a message allowing fast charging to wake up the fast charging pile to the fast charging pile.
Step 8: and the quick charging pile and the BMS5 are in signal interaction with each other to perform quick charging information, if the quick charging pile and the BMS5 are in communication success, the quick charging pile outputs electric energy, and the new energy automobile is subjected to quick charging, otherwise, the charging control is stopped.
Further, before step 1, the method further comprises: and the OBC2 receives the PWM duty ratio signal and performs self-checking.
If the OBC2 self-test is fault-free, detecting whether the charging connection signal and the PWM duty cycle signal are normal, and if the OBC2 self-test is fault, stopping the charging control.
When the OBC2 self-check is fault-free, the charging connection signal is normal, and the duty ratio range of the PWM duty ratio signal is more than or equal to 10% and less than or equal to 97%, the output hard wire of the OBC2 wakes up the VCU4 and the BMS5.
According to the integrated fast and slow charging control system and method for the new energy automobile, provided by the invention, the direct-current fast charging and the alternating-current slow charging can be performed through the single integrated charging socket, so that the whole automobile charging process has uniformity; the method has the advantages of reduced components of the whole vehicle, simple whole vehicle arrangement, saving of whole vehicle cost, unified and simple charging control method, improved charging efficiency and the like.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the above examples being provided only to assist in understanding the system, method, and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (7)
1. The utility model provides a new energy automobile integration charge control system that fills slowly which characterized in that, control system includes:
the integrated charging socket is used for receiving and outputting a charging connection signal, a PWM duty cycle signal and a CAN signal;
the OBC is connected with the integrated charging socket and is used for determining whether the new energy automobile needs to be charged slowly or rapidly according to the PWM duty ratio signal; when the determination result shows that the new energy automobile needs to be charged slowly, the OBC detects whether the alternating voltage of the slow charging pile is normal, and when the detection result shows that the alternating voltage is normal, the OBC sends a slow charging request message;
the PDU is connected with the OBC and is used for closing or opening a slow charging relay or a fast charging relay in the PDU according to a determination result;
the VCU is connected with the OBC and used for detecting whether the new energy automobile has faults or not according to the request slow charge message, and when the new energy automobile has no faults, the VCU sends out a command for allowing the slow charge message;
BMS, which is connected with the OBC and the VCU respectively and is used for sending a message for allowing slow charging current and a message for allowing slow charging voltage to the OBC according to the instruction for allowing slow charging; the method is also used for sending a message for allowing quick charging to the quick charging pile when the determination result indicates that the new energy automobile needs quick charging;
the OBC outputs voltage and current to the power battery according to the message of allowing slow charging current and the message of allowing slow charging voltage, the slow charging pile outputs electric energy, and the new energy automobile carries out slow charging;
the BMS wakes up the quick charging pile through the quick charging allowing message, the quick charging pile and the BMS interact quick charging information through the CAN signal, if the quick charging pile and the BMS are successfully communicated, the quick charging pile outputs electric energy according to the quick charging information, and the new energy automobile carries out quick charging;
when the determined result indicates that the new energy automobile needs to be charged slowly, the slow charging relay is closed, and the fast charging relay is opened; when the determined result indicates that the new energy automobile needs to be charged quickly, the quick charging relay is closed, and the slow charging relay is opened.
2. The integrated fast and slow charging control system of a new energy vehicle according to claim 1, wherein the OBC is further configured to perform self-checking according to the PWM duty cycle signal, and when a self-checking result indicates that the OBC has no fault, the OBC determines whether to wake up the VCU and the BMS according to the charging connection signal and the PWM duty cycle signal.
3. The new energy vehicle integrated fast and slow charging control system according to claim 2, wherein when the charging connection signal is normal and the duty cycle range of the PWM duty cycle signal is 10% or more and 97% or less, the output hard wire of the OBC determines to wake up the VCU and the BMS; otherwise, stopping the charge control.
4. The integrated fast and slow charging control system of a new energy vehicle according to claim 1, wherein when the duty cycle range of the PWM duty cycle signal is greater than or equal to 10% and less than or equal to 90%, the OBC determines that the new energy vehicle needs to be charged slowly; when the duty ratio range of the PWM duty ratio signal is greater than 90% and less than or equal to 97%, the OBC determines that the new energy automobile needs to be charged quickly.
5. The integrated fast and slow charging control system of the new energy automobile according to claim 1, wherein the integrated charging socket comprises a YY1 interface, a YY2 interface, a direct current positive electrode dc+, a direct current negative electrode DC-, a ground wire PE, a first alternating current live wire interface L1, a second alternating current live wire interface L2, a third alternating current live wire interface L3, a zero line interface N, X + interface and an X-interface;
the YY1 interface is used for receiving and outputting the charging connection signal, the YY2 interface is used for receiving and outputting the PWM duty cycle signal, and the X+ interface and the X-interface are both used for receiving and outputting the CAN signal; the direct current positive electrode DC+, the direct current negative electrode DC-and the ground wire PE are used for quick charging of the new energy automobile; the first alternating-current live wire interface L1, the second alternating-current live wire interface L2, the third alternating-current live wire interface L3 and the zero line interface N are used for the new energy automobile to carry out slow charging;
the YY1 interface and the YY2 interface are connected with the OBC; the direct current positive electrode DC+, the direct current negative electrode DC-, the ground wire PE, the first alternating current live wire interface L1, the second alternating current live wire interface L2, the third alternating current live wire interface L3 and the zero line interface N are all connected with the PDU;
the X+ interface and the X-interface are both connected with the BMS.
6. The method for controlling the integrated fast and slow charging of the new energy automobile is characterized in that the control method is applied to the new energy automobile integrated fast and slow charging control system according to any one of claims 1-5, and the control method comprises the following steps:
the OBC determines that the new energy automobile needs to be charged slowly or rapidly according to the PWM duty ratio signal;
when the new energy automobile is determined to be required to be charged slowly, a slow charging relay in the PDU is closed, and a fast charging relay is opened; when the new energy automobile is determined to need to be charged quickly, a quick charging relay in the PDU is closed, and a slow charging relay is opened;
when the slow charging relay is closed and the fast charging relay is opened, the OBC detects whether the alternating voltage is normal, if the alternating voltage is normal, the OBC sends a request slow charging message to the VCU, otherwise, the charging control is stopped;
after the VCU receives the request slow charging message, detecting whether the new energy automobile has a fault or not, and if not, sending a command for allowing the slow charging message to the BMS by the VCU;
the BMS sends a message for allowing slow charging current and a message for allowing slow charging voltage to the OBC according to the instruction for allowing slow charging;
the OBC outputs voltage or current to the power battery according to the message of allowing slow charging current and the message of allowing slow charging voltage, the slow charging pile outputs electric energy, and the new energy automobile carries out slow charging;
when the fast charging relay is closed and the slow charging relay is opened, the BMS sends a message allowing fast charging to wake up the fast charging pile to the fast charging pile;
the quick charging pile and the BMS are in communication with each other through CAN signals to perform quick charging information, if the quick charging pile and the BMS are in communication success, the quick charging pile outputs electric energy, the new energy automobile is subjected to quick charging, and otherwise, charging control is stopped.
7. The method for controlling the integrated fast and slow charging of the new energy automobile according to claim 6, wherein before the OBC determines that the new energy automobile needs to be charged slowly or fast according to the PWM duty cycle signal, the method further comprises:
the OBC receives the PWM duty cycle signal and then carries out self-detection;
if the OBC self-test is fault-free, detecting whether a charging connection signal and the PWM duty cycle signal are normal, and if the OBC self-test is fault, stopping charging control;
when the OBC self-check is fault-free, the charging connection signal is normal, and the duty cycle range of the PWM duty cycle signal is more than or equal to 10% and less than or equal to 97%, the output hard wire of the OBC wakes up the VCU and the BMS.
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