CN102255113A - Method and system for charging electric vehicle, charger and BMS (battery management system) communication module - Google Patents

Method and system for charging electric vehicle, charger and BMS (battery management system) communication module Download PDF

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Publication number
CN102255113A
CN102255113A CN201110086835XA CN201110086835A CN102255113A CN 102255113 A CN102255113 A CN 102255113A CN 201110086835X A CN201110086835X A CN 201110086835XA CN 201110086835 A CN201110086835 A CN 201110086835A CN 102255113 A CN102255113 A CN 102255113A
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China
Prior art keywords
charging
charger
message
battery management
vehicular battery
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CN201110086835XA
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Chinese (zh)
Inventor
李涛
黄志伟
胡玉峰
廖毅
伍广俭
游复生
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广东省电力设计研究院
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Priority to CN201110086835XA priority Critical patent/CN102255113A/en
Publication of CN102255113A publication Critical patent/CN102255113A/en

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/16Information or communication technologies improving the operation of electric vehicles

Abstract

The invention provides a method and system for charging an electric vehicle, a charger and a BMS (battery management system) communication module. A reliable communication mode is established between a vehicle BMS and the charger through message communication shaking so as to finish parameter configuration. The vehicle BMS monitors the charging state of a battery in real time in the charging process and sends the message of the charging state of the battery to inform the charger of regulating charging voltage and current, thus improving the charging efficiency, ensuring the safe and reliable charging and reaching the best charging effect. In the charging process, preset charging conditions are utilized to judge whether the charging of the battery is over, thus the charging of the battery can be stopped automatically in accordance with charging end conditions when the charging of the battery is ended or the charging process is required to suspend due to other situations, thus improving the use flexibility. Statistical data messages are sent after the charging is ended, thus acquiring detailed data on the whole charging process and being convenient to carry out follow-up detection or debugging.

Description

Charging electric vehicle method and system thereof, charger and BMS communication module
Technical field
The present invention relates to the technical field of charging electric vehicle, relate in particular to a kind of charging electric vehicle method, a kind of charging system for electric automobile, and the communication module of charger in the described charging system for electric automobile and Vehicular battery management system (BMS).
Background technology
Energy problem becomes the focus that international community pays close attention to day by day.Electric automobile can be realized " zero discharge ", low noise with electricity generation oil, is the important means that solves the energy and environmental problem.Along with the anxiety of petroleum resources and the development of battery technology, electric automobile aspect performance and the economy near in addition be better than traditional fuel-engined vehicle, and beginning is worldwide applied gradually.
Charging system for electric automobile is the important foundation support system of electric automobile for the electric automobile operation provides energy supply, also is the important step in electric automobile commercialization, the industrialization process.Therefore, charging electric vehicle facility (charging station or charging pile) pilot construction, the harmonious society's demand that meets the friendly type of national creation environment, resource-conserving, and can be effectively for the fast development that promotes New-energy electric vehicle provides the guarantee of the most basic infrastructure, for great facilitation is played in the new forms of energy industry development that promotes entire society.
China and international charging system for electric automobile all lack perfect monitoring means at present, non-vehicle-mounted charge machine in the charging system for electric automobile and Vehicular battery management system (BMS, Battery Management System) communication reliability in charging process and stability are difficult to be protected, and are unfavorable for that the stable of charging process carries out.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of reliable charging electric vehicle method, and this method utilizes the communication between charger and the Vehicular battery management system that whole charging process is realized monitoring control, improves the charging process stability of electric automobile.
A kind of charging electric vehicle method may further comprise the steps: charger and Vehicular battery management system are shaken hands by mutual transmission identification message; Shake hands finish after, described charger and described Vehicular battery management system send the parameter configuration message mutually, and carry out separately charge parameter configuration according to described parameter configuration message; Described charger begins vehicle battery charging; Described Vehicular battery management system sends the battery charging state message to described charger, and described charger is adjusted charging voltage and charging current according to described battery charging state message; Described Vehicular battery management system and described charger judge according to default charging termination condition whether charging finishes respectively, are complete charge then, and send to the other side and to stop the charging message; All after the complete charge, described Vehicular battery management system and described charger send the statistics message of charging process mutually to both sides.
The technical problem to be solved in the present invention also is to provide a kind of reliable charging system for electric automobile.
A kind of charging system for electric automobile comprises charger and the Vehicular battery management system that connects described charger by network.Described charger sends the identification message by network to described Vehicular battery management system and shakes hands, and send the parameter configuration message to described Vehicular battery management system after finishing shaking hands, carry out the charge parameter configuration of self according to the parameter configuration message that is received from described Vehicular battery management system, to vehicle battery charging, and adjust charging voltage and charging current according to the battery charging state message that described Vehicular battery management system sends; Judge whether complete charge according to default charging termination condition then, and when complete charge, send termination charging message to described Vehicular battery management system; After the complete charge, send the statistics of charging process to described Vehicular battery management system.Described Vehicular battery management system sends the identification message by network to described charger and shakes hands, and send the parameter configuration message to described charger after finishing shaking hands, carry out the charge parameter configuration of self according to the parameter configuration message that is received from described charger; Begin the charging back at Vehicular battery and send the battery charging state message to described charger; Judge whether complete charge according to default charging termination condition then, and when complete charge, send termination charging message to described charger; After the complete charge, send the statistics of charging process to described charger.
The technical problem to be solved in the present invention also is to provide a kind of charging electric vehicle machine that can improve the charging electric vehicle reliability.
A kind of charger communication module of charging electric vehicle comprises that handshake module, parameter configuration module, charging module, charging finish module and statistical module.
Described handshake module is used for sending the identification message by network to the Vehicular battery management system shakes hands,
Described parameter configuration module is used for sending the parameter configuration message to described Vehicular battery management system after finishing shaking hands, and carries out self charge parameter configuration according to the parameter configuration message that is received from described Vehicular battery management system,
Described charging module is used for Vehicular battery is charged, and adjusts charging voltage and charging current according to the battery charging state message that described Vehicular battery management system sends;
Described charging finishes module and is used for judging whether complete charge according to default charging termination condition, and sends termination charging message to described Vehicular battery management system when complete charge;
Described statistical module is used for after complete charge, sends the statistics of charger described in the charging process to described Vehicular battery management system.
The technical problem to be solved in the present invention also is to provide a kind of Vehicular battery management system that can improve the electric automobile of charging electric vehicle reliability.
A kind of Vehicular battery management system (BMS) communication module of electric automobile comprises that handshake module, parameter configuration module, charge management module, charging finish module and statistical module.
Described handshake module is used for sending the identification message by network to described charger and shakes hands;
Described parameter configuration module is used to shake hands and sends the parameter configuration message to described charger after finishing, and carries out the charge parameter configuration of self according to the parameter configuration message that is received from described charger;
Described charge management module is used for beginning the charging back at Vehicular battery and sends the battery charging state message to described charger;
Described charging finishes module and is used for judging whether complete charge according to default charging termination condition, and sends termination charging message to described charger when complete charge;
Described statistical module is used for after complete charge, sends the statistics of Vehicular battery management system described in the charging process to described charger.
Compared with prior art, in charging electric vehicle method of the present invention and system thereof, described charging electric vehicle machine and the Vehicular battery management system, shake hands by the message communication that described Vehicular battery management system and described charger carry out, set up the reliable communication pattern, finish parameter configuration, guarantee that at first charging process begins smoothly.The charged state of described then Vehicular battery management system real-time monitoring battery in charging process is adjusted charging voltage, electric current by sending the described charger of described battery charging state message notifying, improves the efficient of charging, reaches best charging effect.In charging process, judge whether that according to predefined charging termination condition charging finishes in real time, then can be by the setting of described charging termination condition, when charging is finished or have other situation to suspend charging process, can stop charging automatically, improve the flexibility of using.At last, send the statistics message, then can know the detailed data of whole charging process, convenient detection later on or debugging in the end back of charging.
Another object of the present invention has provided communication mode, the communication protocol between non-vehicle-mounted charge machine of a kind of electric automobile and the Vehicular battery management system.Make present charging system for electric automobile (for example charging station etc.) can set up complete unified non-vehicle-mounted charge machine of electric automobile and the communication protocol between the Vehicular battery management system, guarantee the communication reliability and the stability of the charging process between the non-vehicle-mounted charge machine and Vehicular battery management system in the electric automobile charging station.
As a kind of preferred implementation, the formulation of the communication protocol between described charger of the present invention and the Vehicular battery management system can reach communication interface and communication protocol specificationsization, standardization based on the communication interface and the communication protocol of CAN network.
Further, the communication protocol between described charger and the Vehicular battery management system is divided into: physical layer, data link layer and application layer.
Described physical layer realizes the electrical connection of charger described in the communication network and described Vehicular battery management system.The physical layer of employing this patent should meet the regulation of international standard ISO 11898-1, SAE1939-11.Described charger preferably adopts the CAN interface that is independent of outside the power assembly control system with communicating by letter of described Vehicular battery management system.Traffic rate between described charger and the described Vehicular battery management system considers that the distance between the charging plug of described charger and described Vehicular battery management system may be very big, preferably adopts the bit rate of 125kbps.
Described data link layer is for providing reliable data transmission between the physical connection.Data frame format between this patent charger and the Vehicular battery management system meets the regulation of CAN bus 2.0B platemaking technology standard.Adopt the equipment of this patent should use CAN to expand 29 bit identifiers of frame.This patent is considered the Information Security that point-to-point mode is communicated by letter between charger and the Vehicular battery management system, selects the PDU1 form for use.
SAE J1939-71 is mainly followed in the definition of this patent application layer, adopts the form of parameter and parameter group definition.Adopt PGN that parameter group is numbered, each node comes the content of recognition data bag according to PGN.The employing cycle sends and event driven mode sends data.The transmission message option of charging stage divides necessary and optional sending item, and the message of necessary sending item should send in strict accordance with message format and content; The message content of optional sending item is set to 0xFF to the byte parameter, and the double byte parameter is set to 0xFFFF, and the nybble parameter is set to 0xFFFFFFFF.
Description of drawings
Fig. 1 is the flow chart of charging electric vehicle method of the present invention;
Fig. 2 is the flow chart of a kind of preferred implementation of charging handshake phase of charging electric vehicle method of the present invention;
Fig. 3 is the flow chart of a kind of preferred implementation of charge parameter configuration phase of charging electric vehicle method of the present invention;
Fig. 4 is the flow chart of a kind of preferred implementation of charging stage of charging electric vehicle method of the present invention;
Fig. 5 is the flow chart that the charging of charging electric vehicle method of the present invention finishes a kind of preferred implementation of statistics stage;
Fig. 6 is the structural representation of charging system for electric automobile of the present invention;
Fig. 7 is the structural representation of a kind of execution mode of the charger in the charging system for electric automobile of the present invention;
Fig. 8 is the structural representation of a kind of execution mode of the Vehicular battery management system in the charging system for electric automobile of the present invention.
Embodiment
See also Fig. 1, Fig. 1 is the flow chart of charging electric vehicle method of the present invention.
Described charging electric vehicle method may further comprise the steps:
S1, charger and Vehicular battery management system (BMS) are shaken hands by mutual transmission identification message;
The Vehicular battery management system of charger and electric automobile be connected and finish power on after, described charger and the mutual co-ordination of described Vehicular battery management system, realize various conversion of operation state, what at first enter after powering on is the charging handshake phase, and described charging handshake phase is finished in step S1.
See also Fig. 2, Fig. 2 is the flow chart of a kind of preferred implementation of charging handshake phase of charging electric vehicle method of the present invention.
In this preferred implementation, before beginning to shake hands, execution in step S101 at first, whether the low pressure accessory power supply that described Vehicular battery management system detects described charger output is normal, if normally then continue execution in step S103, otherwise, notify described charger to close the output of low pressure accessory power supply;
While execution in step S102, described charger sends charger identification message to described Vehicular battery management system, and for example described charger identification message can be set to SPN2563=00;
In step S103, described Vehicular battery management system judges whether to receive the charger identification message of described SPN2563=00, if receive, and execution in step S104 then, send BMS and Vehicular battery identification message to described charger, shake hands with described charger; Otherwise, re-execute step S101; If the overtime charger identification message that does not receive described SPN2563=00 then sends the failure alarm signal of shaking hands.
In step S105, described charger judges whether to receive described BMS and Vehicular battery identification message, if receive, execution in step S106 then sends the charger identification message of SPN2563=01 to described Vehicular battery management system; Otherwise, re-execute step S102; If overtime described BMS and the Vehicular battery identification message of not receiving then sends the failure alarm signal of shaking hands.
In step S107, described Vehicular battery management system judges whether to receive the charger identification message of described SPN2563=01, if receive, then shakes hands successfully; Otherwise, re-execute step S104; If the overtime charger identification message that does not receive described SPN2563=01 then sends the failure alarm signal of shaking hands.
Described Vehicular battery management system and described charger therefrom obtain the other side's necessary information respectively after the identification message that receives the other side's transmission, finish handshake procedure.
As one embodiment of the present invention, the message classification of described charging handshake phase is as shown in table 1 below:
The message code name Message is described PGN PGN(Hex) Priority Data length (byte) The message cycle (ms) Source address-destination address
CRM The charger identification 256 000100H 6 8 250 Charger-BMS
BRM BMS and vehicle recognition message 512 000200H 6 41 250 The BMS-charger
Wherein, PGN is a parameter group numbering (Parameter Group Number).
S2, shake hands finish after, described charger and described Vehicular battery management system send the parameter configuration message mutually, and carry out separately charge parameter configuration according to described parameter configuration message;
After the charging handshake phase was finished, described charger and described Vehicular battery management system entered the charge parameter configuration phase.In this stage, described charger is to the message of the maximum fan-out capability of described Vehicular battery management system transmission charger, and described Vehicular battery management system judges whether and can charge to Vehicular battery according to the maximum fan-out capability of described charger.
See also Fig. 3, Fig. 3 is the flow chart of a kind of preferred implementation of charge parameter configuration phase of charging electric vehicle method of the present invention.
Execution in step S201 at first, described Vehicular battery management system sends battery charge parameter message to described charger;
In step S202, described charger judges whether to receive described battery charge parameter message, if, execution in step S203 then, according to described battery charge parameter message configuration charge parameter, and to described Vehicular battery management system transmitting time synchronously and charger maximum fan-out capability parameter message; Otherwise, execution in step S204, the charger identification message to described Vehicular battery management system transmission SPN2563=01 returns the charging handshake phase among the step S1;
In step S205, described Vehicular battery management system judges whether to receive described time synchronized and the maximum fan-out capability parameter of charger message, if, execution in step S206 then, judging whether according to the charge parameter of maximum fan-out capability parameter of described charger and Vehicular battery can be to vehicle battery charging; Otherwise, return step S201 again, send the charge parameter message of Vehicular battery to described charger;
In described step S206, if judging, described Vehicular battery management system can charge, then execution in step S207 sends BMS to described charger and finishes the message that charging is prepared; Otherwise execution in step S208 sends BMS charging failure message to described charger, for example is the message that SPN2829=0000B is set;
If described charger receives described BMS charging failure message, then execution in step S209 shows the charging failure.
In step S210, described charger judges whether to receive that described BMS finishes the message that charging is prepared, if then execution in step S211 sends charger to described Vehicular battery management system and finishes the message that charging is prepared; Otherwise, return execution in step S203 again;
In step S212, described Vehicular battery management system judges whether to receive that described charger finishes the message that charging is prepared, if then finish the charge parameter configuration, otherwise, re-execute step S207.
At described step S202, S205, among S210 and the S212, if the overtime message that does not receive correspondence, then described Vehicular battery management system or described charger send the warning information of parameter configuration stage failure.
Give an example as one embodiment of the present invention, at described charge parameter configuration phase, the message classification that described Vehicular battery management system and described charger send is as shown in table 2 below:
The message code name Message is described PGN PGN(Hex) Priority Data length (byte) The message cycle (ms) Source address-destination address
BCP The charge in batteries parameter 1536 000600H 6 13 500 The BMS-charger
CTS Charger transmitting time synchronizing information 1792 000700H 6 7 500 Charger-BMS
CML The maximum fan-out capability of charger 2048 000800H 6 8 250 Charger-BMS
BRO The ready state of battery charge 2304 000900H 5 1 250 The BMS-charger
CRO Charger is exported ready state 2560 000A00H 5 1 250 Charger-BMS
After the charge parameter configuration phase is finished, enter the charging stage, i.e. step S3-S5:
S3, described charger begins vehicle battery charging;
S4, described Vehicular battery management system sends the battery charging state message to described charger, and described charger is adjusted charging voltage and charging current according to described battery charging state message;
S5, described Vehicular battery management system and described charger judge whether complete charge according to default charging termination condition, and send termination charging message to the other side when complete charge;
In the whole described charging stage, described Vehicular battery management system sends the battery charging state message to described charger in real time, for example the charge level demand message of storage battery, voltage, batteries temperature, SOC information etc., described charger is then adjusted charging voltage and charging current according to described battery charging state message, normally carries out to guarantee charging process.In charging process, described charger and described Vehicular battery management system send charged state separately mutually.
In the described charging stage, described Vehicular battery management system and described charger judge whether complete charge according to charging termination condition separately, and send termination charging message to the other side.For example: whether described Vehicular battery management system can be normal according to charging process, whether battery status reaches the charging termination condition (promptly whether being full of) that Vehicular battery management system self is set, and whether receive that the termination charging message of charger judges whether complete charge; Described charger then according to whether receive that the user imports stop charging instruction, charging process whether normally, whether reach the charge parameter value of artificial setting, whether receive that perhaps the termination charging message of described Vehicular battery management system judges whether complete charge.
See also Fig. 4, Fig. 4 is the flow chart of a kind of preferred implementation of charging stage of charging electric vehicle method of the present invention.
Execution in step S301 at first, described Vehicular battery management system sends total state message of battery charge and battery charge demand message to described charger; The total state message of described battery charge is mainly described the electric weight of described battery, and described battery charge demand message is then described the actual charging demand of described Vehicular battery.
At step S302, described charger judges whether to receive the total state message of described battery charge, is execution in step S303 then, judges whether receive described battery charge demand message overtime; Otherwise execution in step S304, described charger sends charger to described Vehicular battery management system and finishes the message that charging is prepared, and returns the charge parameter configuration phase; If the overtime total state message of described charging that do not receive yet then sends charging stage failure warning information.
If judge that in step S303 the described battery charge demand message that receives is overtime, then send charging stage failure warning information, otherwise, execution in step S305, described charger sends the charged state message of charger to described Vehicular battery management system, send after the charged state message of described charger, described charger automatically performs step S306, judge whether complete charge according to the charging termination condition that sets in advance, if then execution in step S307 sends termination charging message to described Vehicular battery management system, otherwise, re-execute step S303.
In step S308, described Vehicular battery management system judges whether the charger charged state message that receives is overtime, if it is overtime then send charging stage failure warning information, otherwise, execution in step S309, send the battery status message to described charger, for example: voltage, temperature, SOC (State Of Charge, charged state) information etc.
After execution in step S309, described Vehicular battery management system automatically performs step S310, judges whether complete charge according to the charging termination condition that sets in advance, if then execution in step S311 sends termination charging message to described charger, otherwise, re-execute step S301.
At step S312 and step S313, described Vehicular battery management system and described charger judge whether to receive the other side's termination charging message respectively, if, then stop charging, finish the charging stage; Otherwise, return execution in step S311 and step S307 respectively, if sending, a side stops after the charging message, surpass the termination charging message that the scheduled time does not receive the other side's transmission yet, then send charging stage failure warning information.
Give an example as one embodiment of the present invention, in the described charging stage, the message classification that described Vehicular battery management system and described charger send is as shown in table 3 below:
The message code name Message is described PGN PGN(Hex) Priority Data byte (byte) The message cycle Source address-destination address
BCL The battery charge demand 4096 001000H 6 5 50ms The BMS-charger
BCS The total state of battery charge 4352 001100H 6 8 250ms The BMS-charger
CCS The charger charged state 4608 001400H 6 6 50ms Charger-BMS
BSM Battery condition information 4864 001200H 6 7 250ms The BMS-charger
BMV Each minimum measuring unit voltage of storage battery 5376 001500H 6 Indefinite 1s The BMS-charger
BMT The batteries temperature 5632 001600H 6 Indefinite 1s The BMS-charger
BSOC The charged capacity SOC of batteries 5888 001700H 6 Indefinite 1s The BMS-charger
BST BMS stops charging 6400 001900H 5 3 10ms The BMS-charger
CST Charger stops charging 6656 001A00H 5 3 10ms Charger-BMS
After S6, both sides charged and finish, described Vehicular battery management system and described charger sent the statistics message of charging process mutually.
After described charger and described Vehicular battery management system all stop charging, entering charging and finishing the statistics stage.Send the statistics of whole charging process in described Vehicular battery management system of this stage, comprising: initial SOC, end of a period SOC, battery minimum voltage and ceiling voltage; Described charger is received after the statistics of described Vehicular battery management system, stops the output of low pressure accessory power supply, and sends output electric weight, the accumulative total information such as charging interval of whole charging process charger to described Vehicular battery management system.
See also Fig. 5, Fig. 5 is the flow chart that the charging of charging electric vehicle method of the present invention finishes a kind of preferred implementation of statistics stage.
At first at step S401, described Vehicular battery management system sends BMS charging accounting message to described charger;
At step S402, described charger judges whether to receive described BMS charging accounting message, if then execution in step S403 sends charger charging accounting message to described Vehicular battery management system; Otherwise execution in step S404 sends charger to described Vehicular battery management system and stops the charging message, returns the charging stage; If the overtime described BMS charging accounting message that do not receive yet then sending charging and finishing statistics stage failure warning information.
At step S405, described Vehicular battery management system judges whether to receive described charger charging accounting message, is then to finish whole charging process; Otherwise, re-execute step S401; If the overtime described charger charging accounting message that do not receive yet then sending charging and finishing statistics stage failure warning information.
Give an example as one embodiment of the present invention, finish the statistics stage in described charging, the message classification that described Vehicular battery management system and described charger send is as shown in table 4 below:
The message code name Message is described PGN PGN(Hex) Priority Data byte (byte) The message cycle (ms) Source address-destination address
BSD The BMS statistics 7168 001C00H 6 7 250 The BMS-charger
CSD The charger statistics 7424 001D00H 6 5 250 Charger-BMS
Compared with prior art, in the charging electric vehicle method of the present invention, shake hands, set up the reliable communication pattern, finish parameter configuration, guarantee that at first charging process begins smoothly by the message communication that described Vehicular battery management system and described charger carry out.The charged state of described then Vehicular battery management system real-time monitoring battery in charging process is adjusted charging voltage, electric current by sending the described charger of described battery charging state message notifying, improves the efficient of charging, reaches best charging effect.In charging process, judge whether that according to predefined charging termination condition charging finishes in real time, then can be by the setting of described charging termination condition, when charging is finished or have other situation to suspend charging process, can stop charging automatically, improve the flexibility of using.At last, send the statistics message, then can know the detailed data of whole charging process, convenient detection later on or debugging in the end back of charging.
Communication mode, communication protocol between non-vehicle-mounted charge machine of a kind of electric automobile and the Vehicular battery management system are provided.Make present charging system for electric automobile (for example charging station etc.) can set up complete unified non-vehicle-mounted charge machine of electric automobile and the communication protocol between the Vehicular battery management system, guarantee the communication reliability and the stability of the charging process between the non-vehicle-mounted charge machine and Vehicular battery management system in the electric automobile charging station.
See also Fig. 6, Fig. 6 is the structural representation of charging system for electric automobile of the present invention.
Described charging system for electric automobile comprises charger 61 and the Vehicular battery management system 62 that connects described charger 61 by network;
Described charger 61 sends the identification message by network to described Vehicular battery management system 62 and shakes hands, and send the parameter configuration messages to described Vehicular battery management system 62 after finishing shaking hands, carry out the charge parameter configuration of self according to the parameter configuration message that is received from described Vehicular battery management system 62, battery is charged, and adjust charging voltage and charging current according to the charged state message that described Vehicular battery management system 62 sends; In charging process, described charger 61 judges according to default charging termination condition whether charging finishes, and sends the charging end message to described Vehicular battery management system 62 when complete charge; After the complete charge, described charger 61 sends the statistics of charging process to described Vehicular battery management system 62;
62 of described Vehicular battery management systems send the identification message by network to described charger 61 equally and shake hands, and send the parameter configuration messages to described charger 61 after finishing shaking hands, carry out the charge parameter configuration of self according to the parameter configuration message that is received from described charger 61; After battery began charging, described Vehicular battery management system 62 sent the battery charging state message to described charger 61; And judge according to default charging termination condition whether charging finishes, when complete charge, send the charging end messages to described charger 61; After the complete charge, described Vehicular battery management system 62 sends the statistics of charging process to described charger.
Described charger 61 and described Vehicular battery management system 62 interconnected networks are preferably CAN Frame (CAN data frame) network, it forms the necessary orderly bit field of CAN agreement of transmission data, with frame initial (SOF) beginning, frame end (EOF) ending.
Preferably, described CAN network comprises: realize the physical layer of the electrical connection of described charger 61 and Vehicular battery management system 62, and for the data link layer of reliable data transmission is provided between the physical connection, and application layer;
Described physical layer mainly realizes the electrical connection of charger described in the communication network 61 and described Vehicular battery management system 62.Adopt physical layer of the present invention should meet the regulation of international standard ISO 11898-1, SAE1939-11.Described charger 61 should use the CAN interface that is independent of outside the power assembly control system with communicating by letter of described Vehicular battery management system 62.Traffic rate between described charger 61 and the described Vehicular battery management system 62 considers that the distance between charger 61 and the charging plug may be very big, preferably adopts 125kbps.
Described data link layer is for providing reliable data transmission between the physical connection.Data frame format between described charger 61 of the present invention and the described Vehicular battery management system 62 meets the regulation of CAN bus 2.0B platemaking technology standard.Adopt equipment of the present invention should use 29 bit identifiers of CAN expansion frame.The present invention considers the Information Security that point-to-point mode is communicated by letter between charger 61 and the Vehicular battery management system 62, selects the PDU1 form for use.
SAE J1939-71 is mainly followed in the definition of described application layer, adopts the form of parameter and parameter group definition.Adopt PGN that parameter group is numbered, each node comes the content of recognition data bag according to PGN.The employing cycle sends and event driven mode sends data.Transmission message option in the described charging stage divides necessary and optional sending item, and the message of necessary sending item sends in strict accordance with message format and content; The message content of optional sending item is set to 0xFF to the byte parameter, and the double byte parameter is set to 0xFFFF, and the nybble parameter is set to 0xFFFFFFFF.
Charging system for electric automobile 60 workflows of the present invention can be divided into four-stage: be respectively charging handshake phase, charge parameter configuration phase, charging stage, and charging finishes the statistics stage.Described charger 61 and described Vehicular battery management system 62 are carried out information interaction by the mode that sends message in described four-stage process, guarantee carrying out smoothly of charging.
At the charge parameter configuration phase, the parameter configuration message that described charger 61 sends comprises: the time synchronization information message, and maximum fan-out capability message of charger and charger are exported ready state message; And the parameter configuration message that described Vehicular battery management system 62 sends comprises: the ready state message of battery charge parameter message and battery charge.Described charger 61 and described Vehicular battery management system 62 receive the other side's parameter configuration message respectively, finish separately parameter configuration according to each described parameter configuration message, prepare to enter the charging stage.
In the charging stage, described Vehicular battery management system 62 comprises to the battery charging state message that described charger 61 sends: battery charge demand, the total state of battery charge, battery condition information, each minimum measuring unit voltage of storage battery, batteries temperature, the charged capacity SOC of batteries or the like.Described charger 61 guarantees normally carrying out of charging process, and can monitor and show to the user the various information of Vehicular battery in real time according to charging voltage, the electric current of the message adjustment output of described battery charge demand.
When the described charging stage judges whether complete charge, default charging termination condition is provided with and can comprises with the next item down or multinomial in the described Vehicular battery management system 62: charging process is unusual, battery status reaches preassigned, and receives the termination charging message that described charger 61 sends; Charging termination condition default in the described charger 61 then can comprise with the next item down or multinomial: charging instruction, charging process are unusual, battery status reaches preassigned, and receives the termination charging message that described Vehicular battery management system 62 sends for stopping of receiving that the user imports.
Finish the statistics stage in described charging, the statistics message that described Vehicular battery management system 62 sends comprises with the next item down or multinomial: initial SOC, end of a period SOC, battery minimum voltage and ceiling voltage; And comprise following wherein one at least in the statistics message that described charger 61 sends: output electric weight, accumulative total charging interval.
Described charger 61 and described Vehicular battery management system 62 are by sending described statistics message mutually, finish charging information interaction afterwards, the statistics of whole charging process is shared both sides, strengthen the transparency information of whole charging process, can reach the purpose that reduces the dispute of charging rate.
See also Fig. 7, Fig. 7 is the structural representation of a kind of execution mode of the charger communication module in the charging system for electric automobile of the present invention.
Described charger communication module comprises: handshake module 611, parameter configuration module 612, charging module 613, charging finish module 614 and statistical module 615.
Described handshake module 611 is used for sending the identification message by network to the Vehicular battery management system shakes hands,
Described parameter configuration module 612 is used for sending the parameter configuration message to described Vehicular battery management system after finishing shaking hands, and carries out self charge parameter configuration according to the parameter configuration message that is received from described Vehicular battery management system,
Described charging module 613 is used for battery is charged, and adjusts charging voltage and charging current according to the charged state message that described Vehicular battery management system sends;
Described charging finishes module 614 and is used for judging according to default charging termination condition whether charging finishes, and is complete charge then, and sends the charging end message to described Vehicular battery management system;
Described statistical module 615 is used for after complete charge, sends the statistics of charging process to described Vehicular battery management system.
See also Fig. 8, Fig. 8 is the structural representation of a kind of execution mode of the Vehicular battery communication module in the charging system for electric automobile of the present invention.
Described Vehicular battery communication module comprises that handshake module 621, parameter configuration module 622, charge management module 623, charging finish module 624 and statistical module 625.
Described handshake module 621 is used for sending the identification message by network to described charger and shakes hands;
Described parameter configuration module 622 is used to shake hands and sends the parameter configuration message to described charger after finishing, and carries out the charge parameter configuration of self according to the parameter configuration message that is received from described charger;
Described charge management module 623 is used for beginning the charging back at battery and sends the battery charging state message to described charger;
Described charging finishes module 624 and is used for judging according to default charging termination condition whether charging finishes, and is complete charge then, and sends the charging end message to described charger;
Described statistical module 625 is used for after complete charge, sends the statistics of charging process to described charger.
Compared with prior art, in the communication module of charging system for electric automobile of the present invention, described charging electric vehicle machine and Vehicular battery management system, shake hands by message communication, between described Vehicular battery management system and described charger, set up the reliable communication pattern, finish parameter configuration, guarantee that at first charging process begins smoothly.The charged state of described then Vehicular battery management system real-time monitoring battery in charging process is adjusted charging voltage, electric current by sending the described charger of described battery charging state message notifying, improves the efficient of charging, reaches best charging effect.In charging process, judge whether that according to predefined charging termination condition charging finishes in real time, then can be by the setting of described charging termination condition, when charging is finished or have other situation to suspend charging process, can stop charging automatically, improve the flexibility of using.At last, send the statistics message, then can know the detailed data of whole charging process, convenient detection later on or debugging in the end back of charging.
Simultaneously, because communication mode, communication protocol between the communication module of charger of the present invention and Vehicular battery management system can reduce the communication interface between charger and the Vehicular battery management system, the disunity of communication protocol, and charging failure that causes and charging process unsafe problems.Can reach standardization, the standardization of communication interface by communication protocol of the present invention, guarantee the reliability and stability of the communication of charging station charging process, satisfy the charging electric vehicle growth requirement, improve charge efficiency and guarantee power distribution network safety, reliable, economical operation, improve the performance of enterprises and social benefit, the large-scale application and the popularization that promote electric automobile and its electrically-charging equipment are built.
Above-described embodiment of the present invention does not constitute the qualification to protection range of the present invention.Any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection range of the present invention.

Claims (10)

1. charging electric vehicle method is characterized in that may further comprise the steps:
Charger and Vehicular battery management system are shaken hands by mutual transmission identification message;
Shake hands finish after, described charger and described Vehicular battery management system send the parameter configuration message mutually, and carry out separately charge parameter configuration according to described parameter configuration message;
Described charger begins vehicle battery charging;
Described Vehicular battery management system sends the battery charging state message to described charger, and described charger is adjusted charging voltage and charging current according to described battery charging state message;
Described Vehicular battery management system and described charger judge according to default charging termination condition whether charging finishes respectively, are complete charge then, and send to the other side and to stop the charging message;
All after the complete charge, described Vehicular battery management system and described charger send the statistics message of charging process mutually to both sides.
2. charging electric vehicle method as claimed in claim 1, it is characterized in that, described charger and described Vehicular battery management system are before shaking hands, and whether the low pressure accessory power supply that described Vehicular battery management system detects described charger is normal, and further may further comprise the steps:
If described low pressure accessory power supply is normal, then described Vehicular battery management system sends the identification message and shakes hands, otherwise, notify described charger to close the output of described low pressure accessory power supply.
3. charging electric vehicle method as claimed in claim 1 is characterized in that, described charger and described Vehicular battery management system send the parameter configuration message mutually, and comprises according to the step that described parameter configuration message carries out charge parameter configuration separately:
Described charger sends the message of the maximum fan-out capability of charger to described Vehicular battery management system;
Described Vehicular battery management system judges whether to be then to send BMS to described charger to finish the message that charging is prepared to vehicle battery charging according to the maximum fan-out capability of described charger; Otherwise, send BMS charging failure message;
Described charging receives after the described BMS charging failure message, shows the charging failure.
4. charging system for electric automobile comprises charger and connects the Vehicular battery management system of described charger by network, it is characterized in that:
Described charger sends the identification message by network to described Vehicular battery management system and shakes hands, and send the parameter configuration message to described Vehicular battery management system after finishing shaking hands, carry out the charge parameter configuration of self according to the parameter configuration message that is received from described Vehicular battery management system, to vehicle battery charging, and adjust charging voltage and charging current according to the battery charging state message that described Vehicular battery management system sends; Judge whether complete charge according to default charging termination condition then, and when complete charge, send termination charging message to described Vehicular battery management system; After the complete charge, send the statistics of charging process to described Vehicular battery management system;
Described Vehicular battery management system sends the identification message by network to described charger and shakes hands, and send the parameter configuration message to described charger after finishing shaking hands, carry out the charge parameter configuration of self according to the parameter configuration message that is received from described charger; Begin the charging back at Vehicular battery and send the battery charging state message to described charger; Judge whether complete charge according to default charging termination condition then, and when complete charge, send termination charging message to described charger; After the complete charge, send the statistics of charging process to described charger.
5. charging system for electric automobile as claimed in claim 4 is characterized in that, described Vehicular battery management system comprises to the battery charging state message that described charger sends:
Battery charge demand, the total state of battery charge, battery condition information, each minimum measuring unit voltage of storage battery, batteries temperature, the charged capacity SOC of batteries.
6. charging system for electric automobile as claimed in claim 4, it is characterized in that, the default charging termination condition of described Vehicular battery management system comprises with the next item down or multinomial: charging process is unusual, battery status reaches preassigned, and receives the termination charging message that described charger sends;
The default charging termination condition of described charger comprises with the next item down or multinomial: receive to stop that charging instruction, charging process are unusual, battery status reaches preassigned, and receives the termination charging message that described Vehicular battery management system sends.
7. charging system for electric automobile as claimed in claim 4 is characterized in that, comprises with the next item down or multinomial in the statistics message that described Vehicular battery management system sends: initial SOC, end of a period SOC, battery minimum voltage and ceiling voltage;
At least comprise following wherein one in the statistics message that described charger sends: output electric weight and accumulative total charging interval.
8. charging system for electric automobile as claimed in claim 4, it is characterized in that: described charger and described Vehicular battery management system are connected to each other by the CAN network, described CAN network comprises: the physical layer that meets ISO 11898-1, SAE1939-11 standard, data frame format meets CAN bus 2.0B platemaking technology specification data link layer, and the application layer that meets SAE J1939-71 standard code;
Described physical layer is used to realize the electrical connection of described charger and Vehicular battery management system, and it comprises the CAN interface that is independent of outside the power assembly control system;
Described data link layer is used 29 bit identifiers of CAN expansion frame;
Defined parameters and parameter group in the packet of described application layer, and adopt PGN that parameter group is numbered, each node is discerned the content of described packet according to described PGN.
9. the charger communication module of a charging electric vehicle is characterized in that, comprising:
Handshake module is used for sending the identification message by network to the Vehicular battery management system and shakes hands,
Parameter configuration module is used for sending the parameter configuration message to described Vehicular battery management system after finishing shaking hands, and carries out self charge parameter configuration according to the parameter configuration message that is received from described Vehicular battery management system,
Charging module is used for Vehicular battery is charged, and adjusts charging voltage and charging current according to the battery charging state message that described Vehicular battery management system sends;
Charging finishes module, is used for judging whether complete charge according to default charging termination condition, and stops the charging message to described Vehicular battery management system transmission when complete charge;
Statistical module is used for after complete charge, sends the statistics of charger described in the charging process to described Vehicular battery management system.
10. the Vehicular battery communication module of an electric automobile is characterized in that, comprising:
Handshake module is used for sending the identification message by network to described charger and shakes hands;
Parameter configuration module, being used to shake hands sends the parameter configuration message to described charger after finishing, and carries out the charge parameter configuration of self according to the parameter configuration message that is received from described charger;
Charge management module is used for beginning the charging back at Vehicular battery and sends the battery charging state message to described charger;
Charging finishes module, is used for judging whether complete charge according to default charging termination condition, and stops the charging message to described charger transmission when complete charge;
Statistical module is used for after complete charge, sends the statistics of Vehicular battery management system described in the charging process to described charger.
CN201110086835XA 2011-04-07 2011-04-07 Method and system for charging electric vehicle, charger and BMS (battery management system) communication module CN102255113A (en)

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Application publication date: 20111123