CN110571896A - wireless charging control system and method applied to electric vehicle in field without BMS - Google Patents
wireless charging control system and method applied to electric vehicle in field without BMS Download PDFInfo
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- CN110571896A CN110571896A CN201810619719.1A CN201810619719A CN110571896A CN 110571896 A CN110571896 A CN 110571896A CN 201810619719 A CN201810619719 A CN 201810619719A CN 110571896 A CN110571896 A CN 110571896A
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- 238000005070 sampling Methods 0.000 claims description 24
- 238000004886 process control Methods 0.000 claims description 22
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/60—Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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Abstract
The invention discloses a wireless charging control system and a wireless charging control method applied to an electric vehicle in a field without a BMS, wherein the wireless charging control system comprises a power supply module, a charging pile and an electric vehicle terminal; a wireless charging transmitting system, an APFC module, a wired charging interlocking relay and a wireless communication transmitting module are arranged in the charging pile; the bottom of the electric automobile terminal is provided with a wireless charging receiving system, a wireless communication receiving module, a receiving wire coil, a wired charging interlocking relay and a whole automobile interlocking relay which are electrically connected with each other; the wireless charging transmitting system of the charging pile and the wireless charging receiving system of the electric automobile terminal establish a communication system through the wireless charging transmitting system and the wireless charging receiving system, the wireless charging transmitting system executes a phase-shifted full-bridge power control strategy in the charging process, and a three-ring competition mechanism of a voltage ring, a current ring and a power ring is carried out to change a PWM wave phase-shifted angle value, so that the output power of the system is adjusted, and the reliability and the stability of the wireless charging process of the electric automobile are ensured.
Description
Technical Field
the invention belongs to the field of wireless charging, and particularly relates to wireless charging control of an electric vehicle in an on-site without a BMS.
background
an Electric Vehicle (EV) is a representative of new energy vehicles which rise in recent years, and has the advantages of environmental friendliness, no pollution, convenience in use, zero emission and the like. Electric automobile relies on-vehicle group battery to provide power, and on-vehicle group battery needs frequent charging to guarantee that the electric quantity is sufficient. At present, the main charging mode is wired charging such as charging pile charging and the like. The charging mode has the defects of easy spark and abrasion generation during power insertion, insufficient safety, difficult maintenance and the like. The wireless power transmission technology gets rid of the dependence of the electric automobile on the wire, can effectively overcome the defects, and has the advantages of convenient operation, small restriction on environment and the like, so that the wireless charging of the electric automobile becomes the popular direction of the current research. In order to ensure the smooth proceeding of wireless charging, the wireless charging system of the electric vehicle and the battery management system are required to perform data communication interaction, monitor parameters and state changes in the charging process in real time, feed back the state of the battery in real time, and ensure the stable proceeding of charging. However, in the process of implementing the present invention, the inventor of the present application finds that some electric vehicles, especially electric vehicles applied to the interior areas of warehouses, logistics, tourist attractions, amusement parks, etc., do not have a battery management system (i.e., BMS), so that the reliability and stability of the wireless charging process of the electric vehicle cannot be ensured correspondingly.
accordingly, the present invention has been made in an effort to provide a wireless charging control system and method for an electric vehicle without a BMS in an electric vehicle field.
disclosure of Invention
the invention aims to provide a wireless charging control system and a wireless charging control method applied to an in-site electric vehicle without a BMS (battery management system), which are used for solving the safety problem of the in-site electric vehicle without the BMS in the wireless charging process.
in order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a wireless charging control system applied to an electric vehicle in a field without a BMS (battery management system) comprises a power supply module, a charging pile and an electric vehicle terminal; the power supply module is electrically connected with the charging pile and is externally connected with commercial power;
a wireless charging emission system, an APFC module, a wired charging interlocking relay and a wireless communication emission module are arranged in the charging pile, and the APFC module, the wired charging interlocking relay and the wireless communication emission module are respectively and electrically connected with the wireless charging emission system; the charging piles are respectively provided with a pile number, and the corresponding wireless communication addresses are bound to the pile numbers; a charging gun is hung on the surface of the pile body of the charging pile, a transmitting wire coil is arranged on the periphery of the pile body of the charging pile, and the transmitting wire coil is electrically connected with the wireless charging transmitting system; the wired charging interlocking relay is electrically connected with the commercial power and the charging gun respectively;
the wireless charging receiving system, the wireless communication receiving module, the receiving wire coil, the wired charging interlocking relay and the whole vehicle interlocking relay are electrically connected with each other; the electric automobile terminals are respectively provided with a charging serial number, the charging serial numbers are bound with corresponding wireless communication addresses, and an electromagnetic field is established between the transmitting wire coil and the receiving wire coil; the wired charging interlocking relay is electrically connected with the wireless charging receiving system, the power battery of the electric automobile and the vehicle-mounted charger respectively, and the whole vehicle interlocking relay is electrically connected with the vehicle-mounted charger of the electric automobile terminal and the charging socket of the electric automobile terminal respectively;
the wireless charging transmitting system and the wireless charging receiving system are matched with the pile number or the charging serial number through the wireless communication transmitting module and the wireless communication receiving module to establish communication connection.
Preferably, the wireless communication transmitting module is a 433M wireless communication transmitting module, the wireless communication receiving module is a 433M wireless communication receiving module, and the electric vehicle terminal and the charging pile establish sub-channel 433M wireless communication connection through matching pile numbers or charging serial numbers.
preferably, the vehicle bottom at electric automobile terminal is equipped with temperature detection module, location detection module and foreign matter detection module, temperature detection module, location detection module and foreign matter detection module respectively with wireless receiving system electric connection that charges.
Preferably, the surface of filling electric pile is equipped with human-computer interaction module, human-computer interaction module with wireless transmitting system electric connection that charges.
preferably, the vehicle-mounted interlocking relay and the wired charging interlocking relay are both normally closed relays.
a wireless charging control method applied to an electric vehicle in a field without a BMS comprises a system charging starting control link, a system charging process control link and a system fault control link, and the system has the working procedures as follows: firstly, executing a system charging starting control link to start charging, judging whether the system has a fault, if so, executing a system fault control link, and if not, executing a system charging process control link; after the control link of the charging process of the system is executed for charging, whether the system has a fault is judged, and if the system has the fault, the control link of the system fault is executed; if no fault exists, continuing to charge until the electric quantity is full, and closing the system; the system charging starting control link comprises the following steps:
step S01, a user inputs a charging serial number of a vehicle to be charged through touch control of a human-computer interaction module of the current charging pile, selects a wireless charging mode and sends a charging request;
step S02, judging whether the wireless communication transmitting module receives the charging request of the user, if not, returning to step S01, if, entering the following steps;
Step S03, the wireless communication transmitting module configures 433M communication channel and address by matching the charging serial number;
Step S04, the wireless communication transmitting module sends a charging command to the wireless communication receiving module;
step S05, performing system self-check at the charging pile end, judging whether the system self-check passes or not, prompting system self-check abnormity and entering a system fault control link if the system self-check fails, and entering step S09 if the system self-check passes;
step S06, judging whether the wireless communication receiving module receives the charging command of the wireless communication transmitting module, if not, returning to step S04, if, entering the following steps;
Step S07, judging whether the charging condition of the electric automobile terminal is satisfied, specifically judging whether the positioning detection is passed, whether the foreign matter detection is passed, whether the battery voltage is in the charging voltage range and whether the environment temperature is in the system working temperature range in sequence, if judging that any charging condition is not satisfied, the wireless communication receiving module sends the charging preparation failure information to the wireless communication transmitting module and enters a system fault control link; if all the charging conditions are judged to be met, setting a wired charging interlocking relay at the charging pile end and a wired charging interlocking relay at the electric vehicle terminal at the same time, and preventing a user from carrying out wired charging on the electric vehicle by misoperation in the wireless charging process and generating wired and wireless charging conflict; meanwhile, a whole vehicle interlocking relay of the electric vehicle terminal is set, so that the electric vehicle is prevented from starting and shifting in the charging process;
step S08, the wireless communication receiving module sends information for charging to the wireless communication transmitting module, and the wireless communication receiving module enters a system charging process control link;
step S09, judging whether the wireless communication transmitting module receives the information for preparing charging, if not, returning to step S04, if, entering the following steps;
Step S10, judging whether the output voltage of the APFC module is normal; if the output voltage of the APFC module is judged to be abnormal, prompting that the output voltage of the APFC is abnormal and entering a system fault control link, and if the output voltage of the APFC module is judged to be normal, entering the following steps;
step S11, enabling PWM wave output by the charging pile end;
step S12, judging whether the relative position of the launching wire coil and the receiving wire coil is in a working range, and setting a PWM phase shift angle N degree; meanwhile, judging whether the output voltage of a wireless charging receiving system of the electric automobile terminal is greater than a certain limit voltage, if so, sending a charging stopping instruction to the wireless communication receiving module by the wireless communication transmitting module; and if the output voltage is judged to be equal to or greater than the limit voltage, the wireless communication transmitting module enters a system charging process control link.
Preferably, the system charge start control includes the steps of:
Step S01, a user inputs the stake number of the current charging pile through the mobile phone APP, selects a wireless charging mode and sends a charging request;
step S02, judging whether the wireless communication transmitting module receives the charging request of the user, if not, returning to step S01, if, entering the following steps;
step S03, the wireless communication transmitting module configures 433M communication channel and address by matching the pile number of the charging pile;
step S04, the wireless communication transmitting module sends a charging command to the wireless communication receiving module;
step S05, performing system self-check at the charging pile end, judging whether the system self-check passes or not, prompting system self-check abnormity and entering a system fault control link if the system self-check fails, and entering step S09 if the system self-check passes;
Step S06, judging whether the wireless communication receiving module receives the charging command of the wireless communication transmitting module, if not, returning to step S04, if, entering the following steps;
step S07, judging whether the charging condition of the electric automobile terminal is satisfied, specifically judging whether the positioning detection is passed, whether the foreign matter detection is passed, whether the battery voltage is in the charging voltage range and whether the environment temperature is in the system working temperature range in sequence, if judging that any charging condition is not satisfied, the wireless communication receiving module sends the charging preparation failure information to the wireless communication transmitting module and enters a system fault control link; if all the charging conditions are judged to be met, setting a wired charging interlocking relay at the charging pile end and a wired charging interlocking relay at the electric vehicle terminal at the same time, and preventing a user from carrying out wired charging on the electric vehicle by misoperation in the wireless charging process and generating wired and wireless charging conflict; meanwhile, a whole vehicle interlocking relay of the electric vehicle terminal is set, so that the electric vehicle is prevented from starting and shifting in the charging process;
step S08, the wireless communication receiving module sends information for charging to the wireless communication transmitting module, and the wireless communication receiving module enters a system charging process control link;
step S09, judging whether the wireless communication transmitting module receives the information for preparing charging, if not, returning to step S04, if, entering the following steps;
step S10, judging whether the output voltage of the APFC module is normal; if the output voltage of the APFC module is judged to be abnormal, prompting that the output voltage of the APFC is abnormal and entering a system fault control link, and if the output voltage of the APFC module is judged to be normal, entering the following steps;
step S11, enabling PWM wave output by the charging pile end;
step S12, judging whether the relative position of the launching wire coil and the receiving wire coil is in a working range, and setting a PWM phase shift angle N degree; meanwhile, judging whether the output voltage of a wireless charging receiving system of the electric automobile terminal is greater than a certain limit voltage, if so, sending a charging stopping instruction to the wireless communication receiving module by the wireless communication transmitting module; and if the output voltage is judged to be equal to or greater than the limit voltage, the wireless communication transmitting module enters a system charging process control link.
preferably, the system charging process control unit includes the following steps:
Step S01 includes step S01-1 and step S01-2, and the system enters the charging state while performing step S01-1 and step S01-2:
step S01-1: the wireless charging transmitting system detects parameters of a charging pile end and judges whether working parameters of the wireless charging transmitting system are reached, specifically, input voltage, output current and ambient temperature inside a charging pile body of the wireless charging transmitting system are detected, if the parameters are judged to be abnormal, a system fault control link is entered, a wireless communication transmitting module transmits fault information to a wireless communication receiving module, and meanwhile, the wireless charging transmitting system prohibits power output and PWM wave output; if the judgment parameter is normal, the following step S04 is executed;
Step S01-2: the wireless charging receiving system detects parameters of the electric automobile end and judges whether working parameters of the wireless charging receiving system are reached, specifically, output voltage, output current, environment temperature and battery state of the electric automobile of the wireless charging receiving system of the electric automobile are detected, if the parameters are judged to be abnormal, a system fault control link is entered, the wireless communication receiving module sends fault information to the wireless communication transmitting module, and meanwhile, the wireless charging receiving system releases a wired charging interlocking relay and a whole automobile interlocking relay of the electric automobile terminal, and the wireless charging transmitting system releases the wired charging interlocking relay; if the judgment parameter is normal, the following step S02 is executed;
step S02, the wireless charging receiving system detects the battery voltage of the electric automobile and judges whether the battery voltage is normal, if the battery voltage is abnormal, the system enters a system fault control link, the wireless communication receiving module sends fault information to the wireless communication transmitting module, and meanwhile, the wireless charging receiving system releases a wired charging interlocking relay and a whole automobile interlocking relay of the electric automobile terminal, and the wireless charging transmitting system releases a wired charging interlocking relay in the charging pile; if the parameters are judged to be normal, the following steps are carried out;
step S03, the wireless communication receiving module sends the information message of the charging parameter and the battery state of the wireless charging receiving system to the wireless communication transmitting module periodically;
Step S04, the wireless communication transmitting module detects whether the information message of the charging parameter and the battery state of the wireless charging receiving system is received, if the information message is not received, the system enters a system fault control link, the wireless communication transmitting module transmits fault information to the wireless communication receiving module, and meanwhile, the wireless charging transmitting system prohibits power output and PWM wave output; if the response is received, the wireless communication sending module sends response command message information to the wireless communication receiving module, and the following step S05 is performed;
step S05, including step S051 and step S052, executes step S051 and step S052 simultaneously:
step S051, the wireless charging transmitting system executes a phase-shifted full-bridge power control strategy, and after the execution is finished, the step S06 is carried out;
step S052, the wireless charging receiving system judges whether response command message information is received or not, if not, the wireless charging receiving system enters a system fault control link, the wireless communication receiving module sends fault information to the wireless communication transmitting module, and meanwhile, the wireless charging receiving system releases a wired charging interlocking relay and a whole vehicle interlocking relay of the electric vehicle terminal, and the wireless charging transmitting system releases a wired charging interlocking relay in the charging pile; if the response command message information is judged to be received, the step S10 is executed;
step S06, the wireless charging transmitting system judges whether the charging end condition is satisfied, specifically, whether the wireless charging transmitting system receives the command of stopping charging from the user, whether the battery voltage is larger than the maximum value of the charging voltage, and whether the charging time exceeds the charging protection time, if all the charging end conditions are not satisfied, the step S01-1 is executed; if any charging end condition is judged to be met, the wireless charging transmitting system prohibits power output and the step S07 is carried out;
step S07, the wireless charging emission system judges whether the APFC module finishes discharging, if not, the step S07 is executed again, if yes, the step S08 is executed again;
Step S08, the wireless charging emission system prohibits PWM wave output;
step S09, the wireless communication transmitting module sends a charging stopping command to the wireless communication receiving module;
step S10, the wireless charging receiving system determines whether a charging stop command is received, if it is determined that the charging stop command is not received, the step S01-2 is performed, and if it is determined that the charging stop command is received, the wireless charging receiving system enters a charging stop stage and the step S11 is performed;
step S11, the wireless charging receiving system detects and determines whether the output current of the wireless charging receiving system is zero, if the output current is greater than zero, the step S11 is executed again, and if the output current is equal to zero, the step S12 is executed;
step S12, the wireless charging receiving system releases a wired charging interlocking relay and a whole vehicle interlocking relay of the electric vehicle terminal, and the wireless charging transmitting system releases a wired charging interlocking relay in the charging pile;
step S13, the wireless communication receiving module sends the information that the wireless charging receiving system enters the idle state to the wireless communication transmitting module, and meanwhile, the wireless communication receiving system resets and enters the idle state;
step S14, the wireless charging transmitting system determines whether the wireless charging receiving system enters the idle state, if not, step S14 is executed again, and if yes, the wireless charging transmitting system resets and enters the idle state.
Preferably, the full-bridge power control strategy in step S051 includes a loop sampling voltage loop, a current loop and a power loop competition mechanism, and specifically includes:
step S051-1, an expected charging curve of the battery is set according to the battery characteristics, and the charging curve specifically comprises a voltage value Vouttarget, a current value Iouttarget and an environment temperature value;
step S051-2, loop sampling and calculation are carried out:
voltage loop sampling and calculation: firstly, the wireless charging receiving system carries out AD sampling to obtain the current actual battery charging voltage Voutreal and obtain the expected charging voltage Vouttarget according to the expected charging curve of the battery; secondly, obtaining a voltage deviation delta Vouterror through the delta Vouterror which is Vouttarget-Voutreal; thirdly, the wireless charging receiving system performs voltage loop PI calculation according to the voltage deviation to obtain a Phase-shifting angular variable delta Phase 1;
current loop sampling and calculation: firstly, the wireless charging receiving system carries out AD sampling to obtain the current actual battery charging current Ioutreal and obtain the expected charging current Iouttarget according to the expected charging curve of the battery; secondly, obtaining a current deviation delta Iouterror through the delta Iouterror which is equal to Iouttarget-Ioutreal; thirdly, the wireless charging receiving system performs current loop PI calculation according to the current deviation to obtain a Phase-shifting angular variable delta Phase 2;
Power loop sampling and calculation: firstly, the wireless charging receiving system carries out AD sampling to obtain the current actual battery charging voltage Voutreal and the current actual battery charging current Ioutreal, and the current actual battery charging voltage Voutreal and the current actual battery charging current Ioutreal are obtained through a formula: obtaining the current actual charging power Poutreal according to the power limit value Pmax of the battery of the electric vehicle; secondly, obtaining power deviation delta Pouterror through the delta Pouterror which is Pmax-Poutreal; thirdly, the wireless charging receiving system performs power loop PI calculation according to the power deviation to obtain a Phase-shifting angular variable delta Phase 3;
step S051-3, comparing the delta Phase1, the delta Phase2 and the delta Phase3, and taking the minimum value as the final Phase shift angle variable delta Phase; and the wireless charging receiving system calculates the Phase shift angle value of the target PWM according to the Phase shift angle variable delta Phase.
preferably, the system charging process control link comprises charging time segment protection control, specifically, the wireless charging transmitting system divides the charging process into segments from C1 to Cn according to the battery characteristics, the segment number n is more than or equal to 2, and the charging stage C is1Corresponding charging protection time is set up to Cn; when the actual charging time of the battery at each stage exceeds the charging protection time, the system enters a fault control link, the wireless charging transmitting system prohibits power output, and judges whether the APFC module finishes discharging, and after the discharging is finished, the wireless charging transmitting system prohibits PWM wave output.
The beneficial effects are as follows:
1. the wireless charging transmitting system of the charging pile and the wireless charging receiving system of the electric automobile terminal establish a communication system through the wireless charging transmitting system and the wireless charging receiving system, the wireless charging transmitting system executes a phase-shifted full-bridge power control strategy in the charging process, and a three-ring competition mechanism of a voltage ring, a current ring and a power ring is carried out to change the phase-shifted angle value of a PWM wave, so that the output power of the system is adjusted, and the reliability and the stability of the wireless charging process of the electric automobile are ensured;
2. The electric automobile terminal and the charging pile establish sub-channel 433M wireless communication connection through matching pile numbers or charging serial numbers, so that rapid and accurate matching is achieved, and meanwhile, the 433M wireless communication mode has the advantages of reducing central control units, simplifying a system and reducing cost;
3. the system is connected with the wireless charging receiving system of the electric vehicle end through the temperature detection module, the positioning detection module and the foreign matter detection, so that the accurate positioning of the charging preparation process of the electric vehicle end, the monitoring of the charging environment temperature and the foreign matter detection of the transmitting wire coil are realized, and the charging condition is ensured to be met;
4. the system electrically connects the wired charging interlocking relay with the wireless charging transmitting system of the charging pile, simultaneously electrically connects the other wired charging interlocking relay with the wireless charging receiving system of the electric vehicle terminal, and sets the two wired charging interlocking relays in the wireless charging process, so that the wired charging of the electric vehicle caused by misoperation of a user in the wireless charging process is prevented, wired and wireless charging conflicts are generated, and the charging safety is ensured;
5. this system is connected through the wireless receiving system that charges with whole car interlocking relay and electric motor car end, and whole car interlocking relay of setting prevents that the electric motor car from starting the aversion in the charging process, further ensures charging safety.
6. The system charging process control link comprises charging time subsection protection control, specifically, the wireless charging transmitting system divides the charging process into C1-Cn sections according to the battery characteristics, the number of the sections n is more than or equal to 2, and the charging stage C is1corresponding charging protection time is set up to Cn; when the actual charging time of the battery at each stage exceeds the charging protection time, the system enters a fault control link, the wireless charging transmitting system prohibits power output and judges whether the APFC module finishes discharging, and after the discharging is finished, the wireless charging transmitting system prohibits PWM wave output; thereby further guaranteeing charging safety.
Drawings
FIG. 1 is a system block diagram of the present invention;
FIG. 2 is a flow chart of the control system of the present invention;
FIG. 3 is a flow chart illustrating the system charge initiation control of the present invention;
FIG. 4 is a flow chart illustrating the control of the charging process of the system of the present invention;
FIG. 5 is a schematic illustration of an expected charge curve of an embodiment;
Fig. 6 is a diagram of an actual charging curve of an embodiment.
Detailed Description
As shown in fig. 1, a wireless charging control system applied to an electric vehicle in a building without a BMS includes a power module, a charging pile, and an electric vehicle terminal; the power supply module is electrically connected with the charging pile and is externally connected with commercial power;
a wireless charging emission system, an APFC module, a wired charging interlocking relay and a wireless communication emission module are arranged in the charging pile, and the APFC module, the wired charging interlocking relay and the wireless communication emission module are respectively and electrically connected with the wireless charging emission system; the charging piles are respectively provided with a pile number, and the corresponding wireless communication addresses are bound to the pile numbers; a charging gun is hung on the surface of a pile body of the charging pile, a transmitting wire coil is arranged on the periphery of the pile body of the charging pile, and the transmitting wire coil is electrically connected with a wireless charging transmitting system; the wired charging interlocking relay is electrically connected with the commercial power and the charging gun respectively;
The bottom of the electric automobile terminal is provided with a wireless charging receiving system, a wireless communication receiving module, a receiving wire coil, a wired charging interlocking relay and a whole automobile interlocking relay which are electrically connected with each other, and the wireless communication receiving module, the receiving wire coil, the wired charging interlocking relay and the whole automobile interlocking relay are respectively and electrically connected with the wireless charging receiving system; the electric automobile terminals are respectively provided with a charging serial number, the charging serial numbers are bound with corresponding wireless communication addresses, and an electromagnetic field is established between the transmitting wire coil and the receiving wire coil; the wired charging interlocking relay is electrically connected with the wireless charging receiving system, the power battery of the electric automobile and the vehicle-mounted charger respectively, and the whole vehicle interlocking relay is electrically connected with the vehicle-mounted charger of the electric automobile terminal and the charging socket of the electric automobile terminal respectively;
the wireless charging transmitting system and the wireless charging receiving system are in communication connection through the wireless communication transmitting module and the wireless communication receiving module matching pile numbers or charging serial numbers.
The wireless communication transmitting module is 433M wireless communication transmitting module, the wireless communication receiving module is 433M wireless communication receiving module, and the electric automobile terminal and the charging pile establish sub-channel 433M wireless communication connection through matching pile numbers or charging serial numbers.
the vehicle bottom at electric automobile terminal is equipped with temperature detection module, location detection module and foreign matter detection module, temperature detection module, location detection module and foreign matter detection module respectively with wireless receiving system electric connection that charges.
fill electric pile's surface and be equipped with the human-computer interaction module, human-computer interaction module and wireless charging transmitting system electric connection.
and the whole vehicle interlocking relay and the wired charging interlocking relay are both normally closed relays.
if the rated voltage of the lithium battery pack of the electric automobile is 72V, the charging voltage range is 60-84V:
a wireless charging control method applied to an electric vehicle in a field without a BMS (battery management system) comprises a system charging starting control link, a system charging process control link and a system fault control link, as shown in figure 2, and the system has the following working procedures: firstly, executing a system charging starting control link to start charging, judging whether the system has a fault, if so, executing a system fault control link, and if not, executing a system charging process control link; after the control link of the charging process of the system is executed for charging, whether the system has a fault is judged, and if the system has the fault, the control link of the system fault is executed; if no fault exists, continuing to charge until the electric quantity is full, and closing the system; as shown in fig. 3, the system charging start control procedure includes the following steps:
Step S01, a user inputs a charging serial number of a vehicle to be charged through touch control of a human-computer interaction module of the current charging pile, selects a wireless charging mode and sends a charging request;
Step S02, judging whether the wireless communication transmitting module receives the charging request of the user, if not, returning to step S01, if, entering the following steps;
step S03, the wireless communication transmitting module configures 433M communication channel and address by matching the charging serial number;
step S04, the wireless communication transmitting module sends a charging command to the wireless communication receiving module;
Step S05, performing system self-check at the charging pile end, judging whether the system self-check passes or not, prompting system self-check abnormity and entering a system fault control link if the system self-check fails, and entering step S09 if the system self-check passes;
step S06, judging whether the wireless communication receiving module receives the charging command of the wireless communication transmitting module, if not, returning to step S04, if, entering the following steps;
step S07, judging whether the charging condition of the electric automobile terminal is satisfied, specifically, judging whether the positioning detection is passed, the foreign matter detection is passed, the battery voltage is more than or equal to 60V and less than or equal to 84V, and the environment temperature is less than 47 ℃, if judging that any charging condition is not satisfied, the wireless communication receiving module sends charging preparation failure information to the wireless communication transmitting module and enters a system fault control link; if all the charging conditions are judged to be met, setting a wired charging interlocking relay at the charging pile end and a wired charging interlocking relay at the electric vehicle terminal at the same time, and preventing a user from carrying out wired charging on the electric vehicle by misoperation in the wireless charging process and generating wired and wireless charging conflict; meanwhile, a whole vehicle interlocking relay of the electric vehicle terminal is set, so that the electric vehicle is prevented from starting and shifting in the charging process;
Step S08, the wireless communication receiving module sends information for charging to the wireless communication transmitting module, and the wireless communication receiving module enters a system charging process control link;
Step S09, judging whether the wireless communication transmitting module receives the information for preparing charging, if not, returning to step S04, if, entering the following steps;
Step S10, determining whether the output voltage of the APFC module is normal, specifically whether the output voltage is greater than 370V; if the output voltage of the APFC module is judged to be abnormal, prompting that the output voltage of the APFC is abnormal and entering a system fault control link, and if the output voltage of the APFC module is judged to be normal, entering the following steps;
Step S11, enabling PWM wave output by the charging pile end;
step S12, judging whether the relative position of the launching wire coil and the receiving wire coil is in a working range, and setting a PWM phase shift angle N degree; meanwhile, judging whether the output voltage of a wireless charging receiving system of the electric automobile terminal is greater than a certain limit voltage, wherein the limit voltage is 50V specifically; if the output voltage is judged to be smaller than the limit value voltage, the wireless communication transmitting module sends a charging stopping instruction to the wireless communication receiving module; and if the output voltage is judged to be equal to or greater than the limit voltage, the wireless communication transmitting module enters a system charging process control link.
Preferably, the system charge start control includes the steps of:
Step S01, a user inputs the stake number of the current charging pile through the mobile phone APP, selects a wireless charging mode and sends a charging request;
step S02, judging whether the wireless communication transmitting module receives the charging request of the user, if not, returning to step S01, if, entering the following steps;
step S03, the wireless communication transmitting module configures 433M communication channel and address by matching the pile number of the charging pile;
step S04, the wireless communication transmitting module sends a charging command to the wireless communication receiving module;
step S05, performing system self-check at the charging pile end, judging whether the system self-check passes or not, prompting system self-check abnormity and entering a system fault control link if the system self-check fails, and entering step S09 if the system self-check passes;
step S06, judging whether the wireless communication receiving module receives the charging command of the wireless communication transmitting module, if not, returning to step S04, if, entering the following steps;
step S07, judging whether the charging condition of the electric automobile terminal is met, specifically judging whether the positioning detection is passed, the foreign matter detection is passed, the battery voltage is larger than or equal to 60V and smaller than or equal to 84V, and the environment temperature is smaller than 47 ℃ in sequence; if any charging condition is judged not to be met, the wireless communication receiving module sends charging preparation failure information to the wireless communication transmitting module and enters a system fault control link; if all the charging conditions are judged to be met, setting a wired charging interlocking relay at the charging pile end and a wired charging interlocking relay at the electric vehicle terminal at the same time, and preventing a user from carrying out wired charging on the electric vehicle by misoperation in the wireless charging process and generating wired and wireless charging conflict; meanwhile, a whole vehicle interlocking relay of the electric vehicle terminal is set, so that the electric vehicle is prevented from starting and shifting in the charging process;
Step S08, the wireless communication receiving module sends information for charging to the wireless communication transmitting module, and the wireless communication receiving module enters a system charging process control link;
step S09, judging whether the wireless communication transmitting module receives the information for preparing charging, if not, returning to step S04, if, entering the following steps;
step S10, determining whether the output voltage of the APFC module is normal, specifically whether the output voltage is greater than 370V; if the output voltage of the APFC module is judged to be abnormal, prompting that the output voltage of the APFC is abnormal and entering a system fault control link, and if the output voltage of the APFC module is judged to be normal, entering the following steps;
Step S11, enabling PWM wave output by the charging pile end;
step S12, judging whether the relative position of the launching wire coil and the receiving wire coil is in a working range, and setting a PWM phase shift angle N degree; meanwhile, judging whether the output voltage of a wireless charging receiving system of the electric automobile terminal is greater than a certain limit voltage, wherein the limit voltage is 50V specifically; if the output voltage is judged to be smaller than the limit value voltage, the wireless communication transmitting module sends a charging stopping instruction to the wireless communication receiving module; and if the output voltage is judged to be equal to or greater than the limit voltage, the wireless communication transmitting module enters a system charging process control link.
as shown in fig. 4, the system charging process control unit includes the following steps:
step S01 includes step S01-1 and step S01-2, and the system enters the charging state while performing step S01-1 and step S01-2:
step S01-1: the wireless charging transmitting system detects parameters of a charging pile end and judges whether working parameters of the wireless charging transmitting system are reached, specifically, input voltage, output current and ambient temperature inside a charging pile body of the wireless charging transmitting system are detected, if the parameters are judged to be abnormal, a system fault control link is entered, a wireless communication transmitting module transmits fault information to a wireless communication receiving module, and meanwhile, the wireless charging transmitting system prohibits power output and PWM wave output; if the judgment parameter is normal, the following step S04 is executed;
Step S01-2: the wireless charging receiving system detects parameters of an electric automobile end and judges whether working parameters of the wireless charging receiving system are reached, specifically, output voltage, output current, environment temperature and battery state of the electric automobile of the wireless charging receiving system of the electric automobile are detected, if the parameters are judged to be abnormal, a system fault control link is entered, the wireless communication receiving module sends fault information to the wireless communication transmitting module, and meanwhile, the wireless charging receiving system releases a wired charging interlocking relay and a whole automobile interlocking relay of the electric automobile terminal, and the wireless charging transmitting system releases a wired charging interlocking relay in a charging pile; if the judgment parameter is normal, the following step S02 is executed;
step S02, the wireless charging receiving system detects the battery voltage of the electric vehicle and determines whether the battery voltage is normal, the normal range of the battery voltage: the battery voltage is more than or equal to 60V and less than or equal to 84V, if the battery voltage is judged to be abnormal, the system enters a system fault control link, the wireless communication receiving module sends fault information to the wireless communication transmitting module, and meanwhile, the wireless charging receiving system releases a wired charging interlocking relay and a whole vehicle interlocking relay of the electric vehicle terminal, and the wireless charging transmitting system releases a wired charging interlocking relay in the charging pile; if the parameters are judged to be normal, the following steps are carried out;
step S03, the wireless communication receiving module sends the information message of the charging parameter and the battery state of the wireless charging receiving system to the wireless communication transmitting module periodically;
Step S04, the wireless communication transmitting module detects whether the information message of the charging parameter and the battery state of the wireless charging receiving system is received, if the information message is not received, the system enters a system fault control link, the wireless communication transmitting module transmits fault information to the wireless communication receiving module, and meanwhile, the wireless charging transmitting system prohibits power output and PWM wave output; if the response is received, the wireless communication sending module sends response command message information to the wireless communication receiving module, and the following step S05 is performed;
Step S05, including step S051 and step S052, executes step S051 and step S052 simultaneously:
step S051, the wireless charging transmitting system executes a phase-shifted full-bridge power control strategy, and after the execution is finished, the step S06 is carried out;
step S052, the wireless charging receiving system judges whether response command message information is received or not, if not, the wireless charging receiving system enters a system fault control link, the wireless communication receiving module sends fault information to the wireless communication transmitting module, and meanwhile, the wireless charging receiving system releases a wired charging interlocking relay and a whole vehicle interlocking relay of the electric vehicle terminal, and the wireless charging transmitting system releases a wired charging interlocking relay in the charging pile; if the response command message information is judged to be received, the step S10 is executed;
Step S06, the wireless charging transmitting system judges whether the charging end condition is satisfied, specifically, whether the wireless charging transmitting system receives the command of stopping charging of the user, whether the battery voltage is larger than the maximum value (84V) of the charging voltage, and whether the charging time exceeds the charging protection time, if all the charging end conditions are not satisfied, the step S01-1 is executed; if any charging condition is judged to be met, the wireless charging transmitting system prohibits power output and the step S07 is carried out;
step S07, the wireless charging emission system judges whether the APFC module finishes discharging, specifically, whether the output bus voltage of the APFC module is less than 15V, if the discharging is not finished, the step S07 is executed again, and if the discharging is finished, the step S08 is executed;
Step S08, the wireless charging emission system prohibits PWM wave output;
step S09, the wireless communication transmitting module sends a charging stopping command to the wireless communication receiving module;
step S10, the wireless charging receiving system determines whether a charging stop command is received, if it is determined that the charging stop command is not received, the step S01-2 is performed, and if it is determined that the charging stop command is received, the wireless charging receiving system enters a charging stop stage and the step S11 is performed;
step S11, the wireless charging receiving system detects and determines whether the output current of the wireless charging receiving system is zero, if the output current is greater than zero, the step S11 is executed again, and if the output current is equal to zero, the step S12 is executed;
step S12, the wireless charging receiving system releases a wired charging interlocking relay and a whole vehicle interlocking relay of the electric vehicle terminal, and the wireless charging transmitting system releases a wired charging interlocking relay in the charging pile;
Step S13, the wireless communication receiving module sends the information that the wireless charging receiving system enters the idle state to the wireless communication transmitting module, and meanwhile, the wireless communication receiving system resets and enters the idle state;
step S14, the wireless charging transmitting system determines whether the wireless charging receiving system enters the idle state, if not, step S14 is executed again, and if yes, the wireless charging transmitting system resets and enters the idle state.
Preferably, the step S051 full-bridge power control strategy includes a loop sampling voltage loop, a current loop and a power loop competition mechanism, and specifically includes:
step S051-1, an expected charging curve of the battery is set according to the battery characteristics, and the charging curve specifically comprises a voltage value Vouttarget, a current value Iouttarget and an environment temperature value;
step S051-2, loop sampling and calculation are carried out:
voltage loop sampling and calculation: firstly, the wireless charging receiving system carries out AD sampling to obtain the current actual battery charging voltage Voutreal and obtain the expected charging voltage Vouttarget according to the expected charging curve of the battery; secondly, obtaining a voltage deviation delta Vouterror through the delta Vouterror which is Vouttarget-Voutreal; thirdly, the wireless charging receiving system performs voltage loop PI calculation according to the voltage deviation to obtain a Phase-shifting angular variable delta Phase 1;
current loop sampling and calculation: firstly, the wireless charging receiving system carries out AD sampling to obtain the current actual battery charging current Ioutreal and obtain the expected charging current Iouttarget according to the expected charging curve of the battery; secondly, obtaining a current deviation delta Iouterror through the delta Iouterror which is equal to Iouttarget-Ioutreal; thirdly, the wireless charging receiving system performs current loop PI calculation according to the current deviation to obtain a Phase-shifting angular variable delta Phase 2;
power loop sampling and calculation: firstly, the wireless charging receiving system carries out AD sampling to obtain the current actual battery charging voltage Voutreal and the current actual battery charging current Ioutreal, and the current actual battery charging voltage Voutreal and the current actual battery charging current Ioutreal are obtained through a formula: obtaining the current actual charging power Poutreal according to the power limit value Pmax of the battery of the electric vehicle; secondly, obtaining power deviation delta Pouterror through the delta Pouterror which is Pmax-Poutreal; thirdly, the wireless charging receiving system performs power loop PI calculation according to the power deviation to obtain a Phase-shifting angular variable delta Phase 3;
step S051-3, comparing Δ Phase1, Δ Phase2, Δ Phase3, and taking the minimum value as the final Phase shift angle variable Δ Phase; and the wireless charging receiving system calculates the Phase shift angle value of the target PWM according to the Phase shift angle variable delta Phase.
the system charging process control link comprises charging time subsection protection control, specifically, the wireless charging transmitting system divides the charging process into C1-Cn sections according to the battery characteristics, the number of the sections n is more than or equal to 2, and the charging stage C is1corresponding charging protection time is set up to Cn; when the actual charging time of the battery at each stage exceeds the charging protection time, the system enters a fault control link, the wireless charging transmitting system prohibits power output,and judging whether the APFC module finishes discharging or not, and after the discharging is finished, the wireless charging transmitting system prohibits PWM wave output. Setting an expected charging curve of a battery according to the battery characteristics shown in the following table 1 when the rated voltage of a lithium battery pack of the electric vehicle is 72V and the charging voltage range is 60-84V, wherein the expected charging curve is shown in fig. 5;
TABLE 1
as shown in the above table, the charging process is divided into segments C1 to C5, the charging process is preset in 5 segments, and the target charging times are T1, T2, T3, T4, and T5, respectively. Wherein T1 is 5min, T2 is 10min, T3 is T31+ T32+ T33+ T34 is 210min, T4 is 30min, T5 is 42min, the charge protection time corresponding to T1 is 10min, the charge protection time corresponding to T2 is 20min, the charge protection time corresponding to T31 is 70min, the charge protection time corresponding to T32 is 75min, the charge protection time corresponding to T33 is 45min, the charge protection time corresponding to T34 is 60min, the charge protection time corresponding to T4 is 40min, and the charge protection time corresponding to T5 is 50 min; when the actual charging time of the battery at each stage exceeds the charging protection time, the system enters a fault control link, the wireless charging transmitting system prohibits power output, and judges whether the APFC module finishes discharging, and after the discharging is finished, the wireless charging transmitting system prohibits PWM wave output.
the actual charging curve measured according to the above design is shown in fig. 6, and comparing fig. 5 and 6, it can be found that the actual charging curve matches the expected charging design curve.
in the embodiment, a communication system is established between a wireless charging transmitting system of a charging pile and a wireless charging receiving system of an electric vehicle terminal through the wireless charging transmitting system and the wireless charging receiving system, the wireless charging transmitting system executes a phase-shifted full-bridge power control strategy in the charging process, and a three-ring competition mechanism of a voltage ring, a current ring and a power ring is carried out to change a PWM wave phase-shifted angle value, so that the output power of the system is adjusted, and the reliability and the stability of the wireless charging process of the electric vehicle are ensured;
the electric automobile terminal and the charging pile establish sub-channel 433M wireless communication connection through matching pile numbers or charging serial numbers, so that rapid and accurate matching is achieved, and meanwhile, the 433M wireless communication mode has the advantages of reducing central control units, simplifying a system and reducing cost;
In the embodiment, the temperature detection module, the positioning detection module and the foreign matter detection are connected with the wireless charging receiving system at the electric vehicle end, so that the accurate positioning of the charging preparation process at the electric vehicle end, the monitoring of the charging environment temperature and the foreign matter detection of the transmitting wire coil are realized, and the charging condition is ensured to be met;
In the embodiment, the wired charging interlocking relay is electrically connected with the wireless charging transmitting system of the charging pile, meanwhile, the other wired charging interlocking relay is electrically connected with the wireless charging receiving system of the electric vehicle terminal, and the two wired charging interlocking relays are set in the wireless charging process, so that the electric vehicle is prevented from being charged in a wired manner by misoperation of a user in the wireless charging process, wired and wireless charging conflicts are generated, and the charging safety is ensured;
This embodiment is connected through the wireless receiving system that charges with whole car interlocking relay and electric motor car end, and whole car interlocking relay of setting prevents that the electric motor car from starting the aversion in the charging process, further ensures charging safety.
The system charging process control link of the embodiment includes charging time segment protection control, specifically, the wireless charging transmitting system divides the charging process into segments C1 to Cn according to the battery characteristics, the number of segments n is greater than or equal to 2, and the charging stage C is1corresponding charging protection time is set up to Cn; when the actual charging time of the battery at each stage exceeds the charging protection time, the system enters a fault control link, the wireless charging transmitting system prohibits power output and judges whether the APFC module finishes discharging, and after the discharging is finished, the wireless charging transmitting system prohibits PWM wave output; thereby further guaranteeing charging safety.
the above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present invention.
Claims (8)
1. the utility model provides a be applied to wireless charging control system of electric motor car in area of not taking BMS which characterized in that: the system comprises a power supply module, a charging pile and an electric automobile terminal; the power supply module is electrically connected with the charging pile and is externally connected with commercial power;
a wireless charging emission system, an APFC module, a wired charging interlocking relay and a wireless communication emission module are arranged in the charging pile, and the APFC module, the wired charging interlocking relay and the wireless communication emission module are respectively and electrically connected with the wireless charging emission system; the charging piles are respectively provided with a pile number, and the corresponding wireless communication addresses are bound to the pile numbers; a charging gun is hung on the surface of the pile body of the charging pile, a transmitting wire coil is arranged on the periphery of the pile body of the charging pile, and the transmitting wire coil is electrically connected with the wireless charging transmitting system; the wired charging interlocking relay is electrically connected with the commercial power and the charging gun respectively;
the wireless charging receiving system, the wireless communication receiving module, the receiving wire coil, the wired charging interlocking relay and the whole vehicle interlocking relay are electrically connected with each other; the electric automobile terminals are respectively provided with a charging serial number, the charging serial numbers are bound with corresponding wireless communication addresses, and an electromagnetic field is established between the transmitting wire coil and the receiving wire coil; the wired charging interlocking relay is electrically connected with the wireless charging receiving system, the power battery of the electric automobile and the vehicle-mounted charger respectively, and the whole vehicle interlocking relay is electrically connected with the vehicle-mounted charger of the electric automobile terminal and the charging socket of the electric automobile terminal respectively;
the wireless charging transmitting system and the wireless charging receiving system are matched with the pile number or the charging serial number through the wireless communication transmitting module and the wireless communication receiving module to establish communication connection.
2. the wireless charging control system for the in-building electric vehicle without the BMS of claim 1, wherein: the wireless communication transmitting module is a 433M wireless communication transmitting module, the wireless communication receiving module is a 433M wireless communication receiving module, and the electric automobile terminal and the charging pile establish sub-channel 433M wireless communication connection through matching pile numbers or charging serial numbers.
3. the wireless charging control system for the in-building electric vehicle without the BMS of claim 1, wherein: the vehicle bottom at electric automobile terminal is equipped with temperature detection module, location detection module and foreign matter detection module, temperature detection module, location detection module and foreign matter detection module respectively with wireless receiving system electric connection that charges.
4. the wireless charging control system for the in-building electric vehicle without the BMS of claim 1, wherein: the surface of filling electric pile is equipped with human-computer interaction module, human-computer interaction module with wireless transmitting system electric connection that charges.
5. the wireless charging control system for the in-building electric vehicle without the BMS of claim 1, wherein: and the whole vehicle interlocking relay and the wired charging interlocking relay are both normally closed relays.
6. a wireless charging control method applied to an electric vehicle in a field without a BMS comprises a system charging starting control link, a system charging process control link and a system fault control link, and the system has the working procedures as follows: firstly, executing a system charging starting control link to start charging, judging whether the system has a fault, if so, executing a system fault control link, and if not, executing a system charging process control link; after the control link of the charging process of the system is executed for charging, whether the system has a fault is judged, and if the system has the fault, the control link of the system fault is executed; if no fault exists, continuing to charge until the electric quantity is full, and closing the system; the method is characterized in that the system charging process control link comprises the following steps:
step S01 includes step S01-1 and step S01-2, and the system enters the charging state while performing step S01-1 and step S01-2:
step S01-1: the wireless charging transmitting system detects parameters of a charging pile end and judges whether working parameters of the wireless charging transmitting system are reached, specifically, input voltage, output current and ambient temperature inside a charging pile body of the wireless charging transmitting system are detected, if the parameters are judged to be abnormal, a system fault control link is entered, a wireless communication transmitting module transmits fault information to a wireless communication receiving module, and meanwhile, the wireless charging transmitting system prohibits power output and PWM wave output; if the judgment parameter is normal, the following step S04 is executed;
step S01-2: the wireless charging receiving system detects parameters of an electric automobile end and judges whether working parameters of the wireless charging receiving system are reached, specifically, output voltage, output current, environment temperature and battery state of the electric automobile of the wireless charging receiving system of the electric automobile are detected, if the parameters are judged to be abnormal, a system fault control link is entered, the wireless communication receiving module sends fault information to the wireless communication transmitting module, and meanwhile, the wireless charging receiving system releases a wired charging interlocking relay and a whole automobile interlocking relay of the electric automobile terminal, and the wireless charging transmitting system releases a wired charging interlocking relay in a charging pile; if the judgment parameter is normal, the following step S02 is executed;
step S02, the wireless charging receiving system detects the battery voltage of the electric automobile and judges whether the battery voltage is normal, if the battery voltage is abnormal, the system enters a system fault control link, the wireless communication receiving module sends fault information to the wireless communication transmitting module, and meanwhile, the wireless charging receiving system releases a wired charging interlocking relay and a whole automobile interlocking relay of the electric automobile terminal, and the wireless charging transmitting system releases a wired charging interlocking relay in the charging pile; if the parameters are judged to be normal, the following steps are carried out;
step S03, the wireless communication receiving module sends the information message of the charging parameter and the battery state of the wireless charging receiving system to the wireless communication transmitting module periodically;
step S04, the wireless communication transmitting module detects whether the information message of the charging parameter and the battery state of the wireless charging receiving system is received, if the information message is not received, the system enters a system fault control link, the wireless communication transmitting module transmits fault information to the wireless communication receiving module, and meanwhile, the wireless charging transmitting system prohibits power output and PWM wave output; if the response is received, the wireless communication sending module sends response command message information to the wireless communication receiving module, and the following step S05 is performed;
step S05, including step S051 and step S052, executes step S051 and step S052 simultaneously:
Step S051, the wireless charging transmitting system executes a phase-shifted full-bridge power control strategy, and after the execution is finished, the step S06 is carried out;
step S052, the wireless charging receiving system judges whether response command message information is received or not, if not, the wireless charging receiving system enters a system fault control link, the wireless communication receiving module sends fault information to the wireless communication transmitting module, and meanwhile, the wireless charging receiving system releases a wired charging interlocking relay and a whole vehicle interlocking relay of the electric vehicle terminal, and the wireless charging transmitting system releases a wired charging interlocking relay in the charging pile; if the response command message information is judged to be received, the step S10 is executed;
step S06, the wireless charging transmitting system judges whether the charging end condition is satisfied, specifically, whether the wireless charging transmitting system receives the command of stopping charging from the user, whether the battery voltage is larger than the maximum value of the charging voltage, and whether the charging time exceeds the charging protection time, if all the charging end conditions are not satisfied, the step S01-1 is executed; if any charging end condition is judged to be met, the wireless charging transmitting system prohibits power output and the step S07 is carried out;
Step S07, the wireless charging emission system judges whether the APFC module finishes discharging, if not, the step S07 is executed again, if yes, the step S08 is executed again;
step S08, the wireless charging emission system prohibits PWM wave output;
step S09, the wireless communication transmitting module sends a charging stopping command to the wireless communication receiving module;
Step S10, the wireless charging receiving system determines whether a charging stop command is received, if it is determined that the charging stop command is not received, the step S01-2 is performed, and if it is determined that the charging stop command is received, the wireless charging receiving system enters a charging stop stage and the step S11 is performed;
step S11, the wireless charging receiving system detects and determines whether the output current of the wireless charging receiving system is zero, if the output current is greater than zero, the step S11 is executed again, and if the output current is equal to zero, the step S12 is executed;
step S12, the wireless charging receiving system releases a wired charging interlocking relay and a whole vehicle interlocking relay of the electric vehicle terminal, and the wireless charging transmitting system releases a wired charging interlocking relay in the charging pile;
step S13, the wireless communication receiving module sends the information that the wireless charging receiving system enters the idle state to the wireless communication transmitting module, and meanwhile, the wireless communication receiving system resets and enters the idle state;
step S14, the wireless charging transmitting system determines whether the wireless charging receiving system enters the idle state, if not, step S14 is executed again, and if yes, the wireless charging transmitting system resets and enters the idle state.
7. the wireless charging control method for an in-vehicle electric vehicle without a BMS of claim 6, wherein: step S051 the full-bridge power control strategy includes a loop sampling voltage loop, a current loop, and a power loop competition mechanism, specifically:
Step S051-1, an expected charging curve of the battery is set according to the battery characteristics, and the charging curve specifically comprises a voltage value Vouttarget, a current value Iouttarget and an environment temperature value;
step S051-2, loop sampling and calculation are carried out:
voltage loop sampling and calculation: firstly, the wireless charging receiving system carries out AD sampling to obtain the current actual battery charging voltage Voutreal and obtain the expected charging voltage Vouttarget according to the expected charging curve of the battery; secondly, obtaining a voltage deviation delta Vouterror through the delta Vouterror which is Vouttarget-Voutreal; thirdly, the wireless charging receiving system performs voltage loop PI calculation according to the voltage deviation to obtain a Phase-shifting angular variable delta Phase 1;
current loop sampling and calculation: firstly, the wireless charging receiving system carries out AD sampling to obtain the current actual battery charging current Ioutreal and obtain the expected charging current Iouttarget according to the expected charging curve of the battery; secondly, obtaining a current deviation delta Iouterror through the delta Iouterror which is equal to Iouttarget-Ioutreal; thirdly, the wireless charging receiving system performs current loop PI calculation according to the current deviation to obtain a Phase-shifting angular variable delta Phase 2;
power loop sampling and calculation: firstly, the wireless charging receiving system carries out AD sampling to obtain the current actual battery charging voltage Voutreal and the current actual battery charging current Ioutreal, and the current actual battery charging voltage Voutreal and the current actual battery charging current Ioutreal are obtained through a formula: obtaining the current actual charging power Poutreal according to the power limit value Pmax of the battery of the electric vehicle; secondly, obtaining power deviation delta Pouterror through the delta Pouterror which is Pmax-Poutreal; thirdly, the wireless charging receiving system performs power loop PI calculation according to the power deviation to obtain a Phase-shifting angular variable delta Phase 3;
step S051-3, comparing the delta Phase1, the delta Phase2 and the delta Phase3, and taking the minimum value as the final Phase shift angle variable delta Phase; and the wireless charging receiving system calculates the Phase shift angle value of the target PWM according to the Phase shift angle variable delta Phase.
8. the wireless charging control method for an in-vehicle electric vehicle without a BMS of claim 7, wherein: the system charging process control link comprises charging time subsection protection control, specifically, the wireless charging transmitting system divides the charging process into C1-Cn sections according to the battery characteristics, the number of the sections n is more than or equal to 2, and the charging stage C is1to Cn are all provided with corresponding charging protectiontime; when the actual charging time of the battery at each stage exceeds the charging protection time, the system enters a fault control link, the wireless charging transmitting system prohibits power output, and judges whether the APFC module finishes discharging, and after the discharging is finished, the wireless charging transmitting system prohibits PWM wave output.
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Denomination of invention: A wireless charging control system and method applied to electric vehicles in the field without BMS Effective date of registration: 20220622 Granted publication date: 20201110 Pledgee: Bank of China Limited Xiamen Huli sub branch Pledgor: XIAMEN NEWYEA SCIENCE AND TECHNOLOGY Co.,Ltd. Registration number: Y2022980008609 |
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