CN115179791A - AC-DC integrated European standard electric vehicle charging system and charging control method - Google Patents
AC-DC integrated European standard electric vehicle charging system and charging control method Download PDFInfo
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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
- B60L53/305—Communication interfaces
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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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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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Abstract
An alternating current-direct current integrated European standard electric vehicle charging system and a charging control method thereof are disclosed, wherein an EVCC selects different interaction protocols according to the duty ratio of a charging seat, thereby adopting different charging modes to enable an electric vehicle to carry out alternating current charging and direct current charging; the EVCC and the BMS have a sleep function and are awakened to work when charging, so that the power consumption of the charging system is low.
Description
Technical Field
The invention relates to the technical field of electric automobiles, in particular to an alternating current-direct current integrated European standard electric automobile charging system and a charging control method.
Background
In 2021, the same-proportion increment of the sales volume of the Chinese new energy automobile exceeds that of the fuel oil automobile for the first time and becomes the primary driving force for pulling the growth of the Chinese automobile market, the primary and secondary positions of the fuel oil automobile and the electric automobile are inverted, the phenomenon also occurs in Europe, according to the report of British 'financial Times' in 12 months in 2021, the sales volume of the electric automobile in Europe exceeds that of the diesel automobile for the first time and becomes the second-grade gasoline automobile in the market;
in the european automobile market of 2021 year, although government policies such as tightening of emission policy and increasing of subsidy strength become a main pushing hand for local electric vehicle development, no matter what factors drive, diesel vehicles occupying the first of european automobile consumer categories all year round are overtaken by electric vehicles, and europe is reflected to enter a brand new stage of new and old kinetic energy conversion of the automobile industry, so that the overseas new energy electric vehicle market is bred with huge development business opportunities;
however, the problem of charging of the electric vehicle is firstly faced by the domestic new energy electric vehicle entering the army and foreign markets; because the charging protocols and charging methods of the European charging pile and the domestic charging pile are different, the domestic electric automobile cannot be directly connected with the European charging pile for charging, so that the EVCC needs to be additionally arranged in the domestic electric automobile to become the European-standard electric automobile, and then the European electric automobile is connected with the European charging pile for charging;
however, at present, EVCCs produced by most of domestic manufacturers only support direct-current charging and do not support alternating-current charging; the EVCC supporting the direct-current charging function only supports an external authentication mode of DIN70121 protocol and ISO15118 protocol, but does not support a plug-and-charge authentication mode of ISO15118 protocol, the EVCC supporting the alternating-current charging function only supports alternating-current charging based on IEC61851-1 BC, but does not support alternating-current charging based on ISO15118 protocol, so that the defects of poor protocol consistency, weak interoperability, poor interconnection interoperability and the like of the existing EVCC products are caused, and the connection and charging between the European standard electric automobile and the European product charging pile are inconvenient;
therefore, in summary, there is a need in the market for a charging control system that supports multiple charging protocols and is capable of being conveniently connected to a european product charging pile for charging.
Disclosure of Invention
In order to overcome the defects in the background art, the invention discloses an alternating current-direct current integrated European standard electric vehicle charging system and a charging control method.
In order to achieve the purpose, the invention adopts the following technical scheme:
an alternating current-direct current integrated European-standard electric vehicle charging system comprises a charging seat, an EVCC, a BMS and a direct current 9-32V power supply, wherein the charging seat is used for being connected with a charging gun of a charging pile, a CP (content provider) signal end, a PE (provider) signal end and a PP (polypropylene) signal end of the charging seat are all connected with an input end of the EVCC, a DIN70121 protocol, an ISO15118 protocol and an IEC61851-1 protocol are supported in the EVCC, the EVCC is provided with a CAN (controller area network) 1 interface connected with the BMS, and the direct current 9-32V power supply supplies power to the EVCC;
the charging control method of the charging system comprises the following steps:
1) Manually starting a direct current 9-32V power supply to enable the EVCC to be in a power-on state, or when a charging gun is inserted into a charging seat, enabling the EVCC to be awakened, and initializing the EVCC;
2) After the initialization of the EVCC is completed, the CP carrier wave of the charging seat is detected;
3) If the frequency of the CP carrier is not 1kHz, continuously detecting the CP carrier, and if the frequency of the CP carrier is not 1kHz after 20 seconds of detection, entering the EVCC into a dormant state;
4) If the frequency of the CP carrier wave is 1kHz, detecting the duty ratio of a CP signal end of the charging seat;
5) When the duty ratio of the CP signal end is 5%, the EVCC outputs an A + high level signal to the BMS for awakening the BMS, then the EVCC and the SECC of the charging pile perform PLC communication handshake, if the handshake fails, the step 2 is returned, and if the handshake succeeds, the charging process is started;
6) When the CP duty ratio is 8% -97%, the EVCC outputs an A + high level signal to the BMS for waking up the BMS, and then the EVCC sends an AC charging application to the BMS;
7) If the BMS allows to enter the AC charging, the BMS sends an AC charging entering confirmation to the EVCC and starts an AC charging process;
8) If the BMS does not allow the AC charging to enter, calculating whether the time for sending the AC charging application to the BMS exceeds 20 seconds, if not, sending the AC charging application to the BMS again, and if so, ending the AC charging process;
9) And when the CP duty ratio is neither 5% nor 8% -97%, calculating whether the time for detecting the CP duty ratio exceeds 20 seconds, if not, returning to the position for detecting the CP carrier wave for processing, and if the time exceeds 20 seconds, ending the charging process.
Preferably, the PLC communication handshake process in step 5) includes an SLAC process, an SDP process, and a TCP link establishment process.
Preferably, the charging process in step 5) is:
the method comprises the steps that V2G message interaction is started between an EVCC and the SECC, and then the SECC determines whether a charging protocol adopted by current charging is a DIN70121 protocol or an ISO15118 protocol according to an EVCC request message in a supported application protocol handshaking stage and the condition of a charging pile;
b. when the SECC selects a DIN70121 protocol, the charging pile and the electric automobile carry out a direct current charging process;
c. when the SECC selects an ISO15118 protocol and the EVCC interacts with V2G messages of the SECC to a ServiceDiscovery service discovery stage, the SECC tells the EVCC the payment mode, the energy propagation mode, the service ID, the service type and the like provided by the SECC, and the EVCC selects the EVCC according to the conditions;
d. then when the EVCC and the SECC carry out V2G message interaction to a PaymentServiceSelection Payment and service selection stage and the EVCC selects an External Payment (External Payment), the EVCC and the SECC enter an EIM External authentication mode; if the payment mode selected by the EVCC is Contract payment (Contract), the EVCC and the SECC enter a PNC plug-and-charge authentication mode;
e. when the EVCC and the SECC enter an external authentication mode and interact to a Charging parameter discovery phase of the ChargeParameterdiscovery, if an energy transmission mode PEVRequestEnergyTransfer requested by the EVCC is alternating current, the EVCC and the SECC carry out AC Charging EIM message set, namely EIM alternating current Charging; if the EVCC requested energy transmission mode PEVRequestEnergyTransfer is direct current, the EVCC requested energy transmission mode PEVRequedEnergyTransfer and the EVCC requested energy transmission mode PEVRequedEnergyTransfer perform DC Charging EIM message set, namely EIM direct current Charging;
f. when the EVCC and the SECC enter a plug-and-play authentication mode and interact to a Charging parameter discovery stage of a Charging parameter, if an energy transmission mode PEVRequestEnergyTransfer requested by the EVCC is alternating current, the EVCC and the SECC carry out AC Charging PNC message set, namely PNC alternating current Charging; if the EVCC requested energy transmission modes PEVRequestEnergyTransfer are direct current, they will perform DC Charging PNC message set, i.e. PNC direct current Charging.
Preferably, the ac charging process in step 7) is:
the method comprises the steps that an alternating current charging current limit message and a charging starting application message are sent to a BMS in a circulating mode by the EVCC, and if the BMS replies a charging starting permission message to the EVCC, the EVCC and the BMS enter a charging circulating stage;
b. in the charging cycle stage, the EVCC cycle sends an alternating current charging current limit message and a charging stop application message to the BMS;
c. and when the battery is fully charged or the charging stop condition is reached, the BMS sends a charging stop message to the EVCC, and the EVCC enters a lower current range to finish charging.
Preferably, the EVCC is provided with a CAN2 interface, which serves as a diagnostic download interface.
Preferably, when the charging is normally finished or the charging process is abnormally terminated and the CP signal does not exist, the EVCC turns off the BMS wake-up signal first and then puts itself into the sleep state.
Due to the adoption of the technical scheme, the charging system and the charging control method for the European standard electric vehicle integrating alternating current and direct current have the following beneficial effects:
1. the EVCC selects different interaction protocols according to the duty ratio of the charging seat, so that different charging modes are adopted, and the electric automobile can be charged by alternating current and direct current;
2. the EVCC and the BMS have a sleep function and are awakened to work when charging, so that the power consumption of the charging system is low.
Drawings
FIG. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic diagram of a charging control method;
FIG. 3 is a schematic diagram of a charging process;
fig. 4 is a schematic diagram of an ac charging process.
Detailed Description
In the following description, the technical solutions of the present invention will be described with reference to the drawings of the embodiments of the present invention, and it should be understood that, if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", etc., it is only corresponding to the drawings of the present invention, and for convenience of describing the present invention, it is not necessary to indicate or imply that the indicated devices or elements have a specific orientation:
the charging station is used for being connected with a charging gun of a charging pile, whether the charging gun is inserted into the charging station is detected through a PP signal of the charging station, charging control guidance is achieved through CP and PE signals, PLC communication is conducted with the SECC of the charging pile, a CP signal end, a PE signal end and a PP signal end of the charging station are all connected with an input end of the EVCC, the EVCC supports DIN70121 protocol, ISO15118 protocol and IEC61851-1 protocol, the EVCC selects different interaction protocols according to duty ratio conditions of the CP signal end of the charging station, accordingly, different charging modes are adopted, the electric automobile CAN conduct alternating current charging and direct current charging, the EVCC is provided with a CAN1 interface connected with the BMS, and the direct current 9-32V power supply supplies power to the EVCC;
the charging control method of the charging system comprises the following steps:
1) Manually starting a direct current 9-32V power supply to enable the EVCC to be in a power-on state, or awakening the EVCC when a charging gun is inserted into a charging seat, and initializing the EVCC;
2) After the initialization of the EVCC is completed, the CP carrier wave of the charging seat is detected;
3) If the frequency of the CP carrier wave is not 1kHz, the CP carrier wave is continuously detected, and if the frequency of the CP carrier wave is not 1kHz after 20 seconds of detection, the EVCC enters a dormant state;
4) If the frequency of the CP carrier wave is 1kHz, detecting the duty ratio of a CP signal end of the charging seat;
5) When the duty ratio of the CP signal end is 5%, the EVCC outputs an A + high level signal to the BMS for awakening the BMS, then the EVCC and the SECC of the charging pile perform PLC communication handshake, if the handshake fails, the step 2 is returned, and if the handshake succeeds, the charging process is started;
6) When the CP duty ratio is 8% -97%, the EVCC outputs an A + high level signal to the BMS for waking up the BMS, and then the EVCC sends an AC charging application to the BMS;
7) If the BMS allows to enter the AC charging, the BMS sends an AC charging entering confirmation to the EVCC and starts an AC charging process;
8) If the BMS does not allow the AC charging, calculating whether the time for sending the AC charging application to the BMS exceeds 20 seconds, if not, sending the AC charging application to the BMS again, and if the time exceeds 20 seconds, ending the AC charging process;
9) And when the CP duty ratio is neither 5% nor 8% -97%, whether the time for detecting the CP duty ratio exceeds 20 seconds is calculated, if not, the process returns to the position for detecting the CP carrier wave for processing, and if the time exceeds 20 seconds, the charging process is ended.
Preferably, the PLC communication handshake process in step 5) includes an SLAC process, an SDP process and a TCP link establishment process.
Preferably, the charging process in step 5) is as follows:
the method comprises the steps that V2G message interaction is started between an EVCC and the SECC, and then the SECC determines whether a charging protocol adopted by current charging is a DIN70121 protocol or an ISO15118 protocol according to an EVCC request message in a supported application protocol handshaking stage and the condition of a charging pile; in addition, in the handshake phase of the supported application protocol, the EVCC sends the priority of the protocol supported by the EVCC to the SECC; because the charging protocols supported by the SECCs in different charging piles are different, if the SECCs support both the DIN70121 protocol and the ISO15118 protocol, and if the SECCs support only one of the two protocols, when the SECCs support both the DIN70121 protocol and the ISO15118 protocol, the SECCs select the protocol with high priority supported by the EVCCs; when the SECC only supports one of the two protocols, the SECC can only select the corresponding protocol in the charging process;
b. when the SECC selects a DIN70121 protocol, the charging pile and the electric automobile carry out a direct current charging process;
c. when the SECC selects an ISO15118 protocol, and the EVCC interacts with V2G messages of the SECC to a ServiceDiscovery service discovery stage, the SECC informs the EVCC of a payment mode, an energy propagation mode, a service ID, a service type and the like provided by the SECC;
d. then when the EVCC and the SECC carry out V2G message interaction to a PaymentServiceSelection Payment and service selection stage and the EVCC selects an External Payment (External Payment), the EVCC and the SECC enter an EIM External authentication mode; if the payment mode selected by the EVCC is Contract payment (Contract), the EVCC and the SECC enter a PNC plug-and-charge authentication mode;
e. when the EVCC and the SECC enter an external authentication mode and interact to a Charging parameter discovery phase of a Charging parameter, if an energy transmission mode PEVRequestEnergyTransfer requested by the EVCC is alternating current, the EVCC and the SECC carry out AC Charging EIM message set, namely EIM alternating current Charging; if the EVCC requested energy transmission mode PEVRequestEnergyTransfer is direct current, the EVCC requested energy transmission mode PEVRequedEnergyTransfer and the EVCC requested energy transmission mode PEVRequedEnergyTransfer perform DC Charging EIM message set, namely EIM direct current Charging;
f. when the EVCC and the SECC enter a plug-and-play authentication mode and interact to a Charging parameter discovery stage of a Charging parameter, if an energy transmission mode PEVRequestEnergyTransfer requested by the EVCC is alternating current, the EVCC and the SECC carry out AC Charging PNC message set, namely PNC alternating current Charging; if the EVCC requested energy transmission modes PEVRequestEnergyTransfer are direct current, they will perform DC Charging PNC message set, i.e. PNC direct current Charging.
Preferably, the ac charging process in step 7) is:
the method comprises the steps that an alternating current charging current limit message and a charging starting application message are sent to a BMS in a circulating mode by the EVCC, and if the BMS replies a charging starting permission message to the EVCC, the EVCC and the BMS enter a charging circulating stage;
b. in the charging cycle stage, the EVCC cycle sends an alternating current charging current limit message and a charging stop application message to the BMS;
c. when the battery is fully charged or reaches a charging stop condition, the BMS sends a charging stop message to the EVCC, and the EVCC enters a lower current process to finish charging;
according to fig. 4, during the AC charging application phase, the EVCC sends an INQUIRY _ CHARGE _ ENTER _ AC _ CHARGE _ COMMAND to the BMS, the COMMAND inquiring whether the BMS allows to ENTER AC charging, and the contents of the COMMAND include: the CAN1 communication protocol version number during alternating current charging is 0X01; the BMS corresponds to the return message to be INQUIRY _ CHARGER _ ENTER _ AC _ CHARGE _ CONFIRM, and the content includes: whether the BMS allows ac charging;
at the charging confirmation stage, the EVCC sends an INQUIRY _ CHARGE _ SWITCH _ AC _ CHARGE _ COMMAND instruction to the BMS inquiring whether the BMS can start or end charging, the contents of the instruction including: whether charging can be started or not and whether charging can be ended or not; a parameter IsSwitchAC of 0x00 indicates whether the query can end charging, and 0x01 indicates whether the query can start charging; the message is used by the EVCC to inquire whether the BMS can start charging when starting the charging application phase or whether the BMS can stop charging (charging is complete) already in the charging cycle phase; the BMS corresponds to the return message to be INQUIRY _ CHARGE _ SWITCH _ AC _ CHARGE _ CONFIRM, and the content includes: whether charging is allowed to start or not and whether charging is allowed to end or not; a parameter SwitchType of 0x00 indicates that the type is end charging, and 0x01 indicates that the type is start charging; a parameter IsAllowed of 0X00 indicates not allowed, and 0X01 indicates allowed;
in the charging cycle phase, NOTIFY _ charge _ PARAMETER _ AC _ CAPABILITY _ COMMAND is a COMMAND for EVCC to inform BMS charging post of maximum current limit; the content comprises the following steps: the maximum limit value of the current (unit is A), the CP duty ratio value (0% -100%), and the current state of the S2 switch; the BMS CONFIRMs that the command message sent by the EVCC is received, and the corresponding return message is NOTIFY _ CHARGER _ PARAMETER _ AC _ CAPABILITY _ CONFIRM;
and NOTIFY _ CHARGE _ FINISH _ AC _ CHARGE _ COMMAND is EVCC informing BMS that charging post has stopped charging (possibly abnormal emergency stop or customer abort); when the alternating current charging application stage, the charging application starting stage and the charging cycle stage are entered, the BMS only needs to receive the message to indicate that the charging pile is possibly abnormal or the client operation stops the alternating current charging; the corresponding return message of BMS is NOTIFY _ CHARGER _ FINISH _ AC _ CHARGE _ CONFIRM, which indicates that the EVCC sending command message is confirmed to be received;
NOTIFY _ CHARGING _ STATUS _ NOTIFICATION is BMS NOTIFICATION EVCC charge STATUS; the method comprises the following steps: a state of charge; the command is a heartbeat command sent by the BMS in the charging process, and the heartbeat interval is 100ms; if the EVCC does not receive the heartbeat message for more than 5s in the charging process, stopping the charging process; the parameter ChargeStatus indicates that charging is permitted when it is 0X00, and indicates that charging is prohibited when it is 0X 01.
In addition, the following are some cases of charge suspension:
normally stopping charging:
when the EVCC and the BMS enter the charging cycle phase, the EVCC sends a COMMAND message to BMS INQUIRY _ CHARGER _ SWITCH _ AC _ CHARGE _ COMMAND in a cycle mode, whether the BMS can finish charging is inquired, when the battery is full or the condition of stopping charging is reached, the BMS fills the switchType to stop, the IsAllowed fills to permit, and the EVCC carries out corresponding current process to finish charging. Otherwise, the BMS padding SwitchType is stop, and the IsAllowed padding is forbid, which indicates that the BMS requires to continue charging.
And (3) abnormal charge stopping:
when the EVCC and the BMS are in an AC charging application stage, a charging application stage is started to a charging cycle stage, as long as the BMS receives a NOTIFY _ CHARGER _ FINISH _ AC _ CHARGE _ COMMAND message sent by the EVCC, the charging is stopped due to abnormity or customer operation, and the BMS performs a corresponding current process to FINISH charging.
When the EVCC and the BMS are in an AC CHARGING application stage, a CHARGING application stage is started to a CHARGING cycle stage, and as long as the EVCC receives a heartbeat message NOTIFY _ CHARGING _ STATUS _ NOTIFICATION sent by the BMS end and the chargeable STATUS is forbidden for forbid, the EVCC carries out a corresponding lower current process to finish CHARGING.
BMS exception handling:
in the start charging application phase and the charging cycle phase, if the BMS does not receive the maximum current limit NOTIFY _ charging _ PARAMETER _ AC _ CAPABILITY _ COMMAND message and the stop charging request message sent by the EVCC to the BMS beyond 5s, the BMS enters a lower current path to end charging.
EVCC exception handling:
in the CHARGING application starting phase and the CHARGING cycle phase, if the EVCC exceeds 5s and does not receive the heartbeat message NOTIFY _ CHARGING _ STATUS _ NOTIFICATION sent by the BMS to the EVCC, the EVCC enters a lower current range to finish CHARGING.
Preferably, the EVCC is provided with a CAN2 interface, and the interface is used as a diagnosis download interface, so that a diagnosis log CAN be conveniently downloaded and the fault reason of charging failure CAN be conveniently located.
Preferably, when the charging is finished normally or the charging process is aborted and the CP signal does not exist, the EVCC first turns off the BMS wake-up signal and then makes the EVCC enter the sleep state.
The invention is not described in detail in the prior art, and it is apparent to a person skilled in the art that the invention is not limited to details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not to be construed as limiting the claims.
Claims (6)
1. The utility model provides an integrative european standard electric automobile charging system of alternating current-direct current, characterized by: the charging seat is used for being connected with a charging gun of a charging pile, a CP signal end, a PE signal end and a PP signal end of the charging seat are connected with an input end of the EVCC, a DIN70121 protocol, an ISO15118 protocol and an IEC61851-1 protocol are supported in the EVCC, the EVCC is provided with a CAN1 interface connected with the BMS, and the direct-current 9-32V power supply supplies power to the EVCC;
the charging control method of the charging system comprises the following steps:
1) Manually starting a direct current 9-32V power supply to enable the EVCC to be in a power-on state, or when a charging gun is inserted into a charging seat, enabling the EVCC to be awakened, and initializing the EVCC;
2) After the initialization of the EVCC is completed, the CP carrier wave of the charging seat is detected;
3) If the frequency of the CP carrier wave is not 1kHz, the CP carrier wave is continuously detected, and if the frequency of the CP carrier wave is not 1kHz after 20 seconds of detection, the EVCC enters a dormant state;
4) If the frequency of the CP carrier wave is 1kHz, detecting the duty ratio of a CP signal end of the charging stand;
5) When the duty ratio of the CP signal end is 5%, the EVCC outputs an A + high level signal to the BMS for awakening the BMS, then the EVCC and the SECC of the charging pile perform PLC communication handshake, if the handshake fails, the step 2 is returned, and if the handshake succeeds, the charging process is started;
6) When the CP duty ratio is 8% -97%, the EVCC outputs an A + high level signal to the BMS for waking up the BMS, and then the EVCC sends an AC charging application to the BMS;
7) If the BMS allows to enter the AC charging, the BMS sends an AC charging entering confirmation to the EVCC and starts an AC charging process;
8) If the BMS does not allow the AC charging to enter, calculating whether the time for sending the AC charging application to the BMS exceeds 20 seconds, if not, sending the AC charging application to the BMS again, and if so, ending the AC charging process;
9) And when the CP duty ratio is neither 5% nor 8% -97%, whether the time for detecting the CP duty ratio exceeds 20 seconds is calculated, if not, the process returns to the position for detecting the CP carrier wave for processing, and if the time exceeds 20 seconds, the charging process is ended.
2. The ac-dc integrated european standard electric vehicle charging system according to claim 1, wherein: the PLC communication handshake process in the step 5) comprises an SLAC process, an SDP process and the establishment of a TCP link.
3. The ac-dc integrated european standard electric vehicle charging system according to claim 1, wherein: the charging process in the step 5) comprises the following steps:
the method comprises the steps that V2G message interaction is started between an EVCC and the SECC, and then the SECC determines whether a charging protocol adopted by current charging is a DIN70121 protocol or an ISO15118 protocol according to an EVCC request message in a supported application protocol handshaking stage and the condition of a charging pile;
b. when the SECC selects a DIN70121 protocol, the charging pile and the electric automobile carry out a direct current charging process;
c. when the SECC selects an ISO15118 protocol and the EVCC interacts with V2G messages of the SECC to a ServiceDiscovery service discovery stage, the SECC tells the EVCC the payment mode, the energy propagation mode, the service ID, the service type and the like provided by the SECC, and the EVCC selects the EVCC according to the conditions;
d. then when the EVCC and the SECC carry out V2G message interaction to a PaymentServiceSelection payment and service selection stage and the EVCC selects an external payment (ExternalPayment), the EVCC and the SECC enter an EIM external authentication mode; if the payment mode selected by the EVCC is Contract payment (Contract), the EVCC and the SECC enter a PNC plug-and-charge authentication mode;
e. when the EVCC and the SECC enter an external authentication mode and interact to a charging parameter discovery phase of a charging parameter, if an energy transmission mode PEVRequestEnergyTransfer requested by the EVCC is alternating current, the EVCC and the SECC carry out an charging EIM message set, namely EIM alternating current charging; if the EVCC requested energy transmission mode PEVRequestEnergyTransfer is direct current, the EVCC requested energy transmission mode PEVRequedEnergyTransfer and the EVCC requested energy transmission mode PEVRequedEnergyTransfer perform DC Charging EIM message set, namely EIM direct current Charging;
f. when the EVCC and the SECC enter a plug-and-play authentication mode and interact to a charging parameter discovery stage of the ChargeParameterdiscovery, if an energy transmission mode PEVRequestEnergyTransfer requested by the EVCC is an exchange, the EVCC and the SECC carry out an ACCharging PNC message set, namely PNC exchange charging; if EVCC requests energy transmission mode PEVRequestEnergyTransfer as direct current, they will perform DC Charging PNC message set, i.e. PNC direct current Charging.
4. The ac-dc integrated european standard electric vehicle charging system according to claim 1, wherein: the alternating current charging process in the step 7) comprises the following steps:
the method comprises the steps that an alternating current charging current limit message and a charging starting application message are sent to a BMS in a circulating mode by the EVCC, and if the BMS replies a charging starting permission message to the EVCC, the EVCC and the BMS enter a charging circulating stage;
b. in the charging cycle stage, the EVCC cycle sends an alternating current charging current limit message and a charging stop application message to the BMS;
c. and when the battery is fully charged or the charging stop condition is reached, the BMS sends a charging stop message to the EVCC, and the EVCC enters a lower current range to finish charging.
5. The ac-dc integrated european standard electric vehicle charging system according to claim 1, wherein: the EVCC is provided with a CAN2 interface which is used as a diagnosis downloading interface.
6. The ac-dc integrated european standard electric vehicle charging system according to claim 1, wherein: when the charging is normally finished or the charging process is abnormally stopped and the CP signal does not exist, the EVCC firstly closes the BMS awakening signal and then enables the EVCC to enter a dormant state.
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