CN103812944A - Remote update system and method for electric automobile ECU - Google Patents
Remote update system and method for electric automobile ECU Download PDFInfo
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- CN103812944A CN103812944A CN201410065098.9A CN201410065098A CN103812944A CN 103812944 A CN103812944 A CN 103812944A CN 201410065098 A CN201410065098 A CN 201410065098A CN 103812944 A CN103812944 A CN 103812944A
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Abstract
The invention provides a remote update system and method for an electric automobile ECU. The remote update system comprises a transmission computer arranged at a remote data center and the ECU arranged at the vehicle-mounted end and further comprises a GPRS data transceiver arranged at the vehicle-mounted end and a data recorder, wherein the transmission computer is in interactive connection with the GPRS data transceiver through an Internet network platform and a mobile network platform, the GPRS data transceiver is in interactive connection with the data recorder, and the data recorder is in interactive connection with the ECU through an CAN bus. The invention further relates to the remote update method for the electric automobile ECU. The remote update of the electric automobile ECU program is achieved, accordingly program maintenance of vehicle factories or ECU suppliers can be convenient and quick, and the technical guarantee level is improved.
Description
Technical field
The present invention relates to Control of Electric Vehicles technical field, specifically a kind of remote update system for electric automobile ECU and method.
Background technology
Along with the development of electric automobile electronic technology and improving constantly of automotive performance, ECU(electronic control unit on electric automobile) more and more, as motor driven systems, battery management system, air-conditioning system, high-low pressure control system, instrument and body control system etc.These ECU are the electronic products of employing new technology, and its maintenance requirement is higher, and uneven due to driver and attendant's technical merit, in the time breaking down, is difficult to analyze in time and search problem, and is difficult to accomplish timely and effective to the eliminating of fault.In addition, in the time needing for a certain reason certain ECU carry out firmware upgrade or control parameter adjustment, vehicle need to be reached to appointed place, got on the bus by relevant devices such as attendant or professional service staff's carrying notebook computer, inverters, open controller housing, manually upgrade, operate very loaded down with trivial detailsly, waste time and energy.
Summary of the invention
The object of the present invention is to provide a kind of remote update system for electric automobile ECU and method, can realize vehicle-mounted ECU is carried out remote transfer of data, writes and upgraded by this system and method.
Technical scheme of the present invention is:
A kind of remote update system for electric automobile ECU, comprise the transmission computer of being located at remote data center and the ECU that is located at vehicle-mounted end, also comprise GPRS data collector and the data logger of being located at vehicle-mounted end, described transmission computer is connected with mobile network platform and GPRS data collector are interactive by the Internet network platform, described GPRS data collector is connected with data logger is interactive, and described data logger is connected with ECU is interactive by CAN bus.
The described remote update system for electric automobile ECU, described data logger comprises central processing unit, serial communication interface, CAN communication interface, TF card interface and TF card, described central processing unit is connected by serial communication interface and GPRS data collector are interactive, described central processing unit is connected by CAN communication interface and automobile CAN-bus are interactive, and described central processing unit is connected by TF card interface and TF card are interactive.
The described remote update system for electric automobile ECU, described ECU comprises car load control unit, instrument display unit and battery management unit.
The described remote update system for electric automobile ECU, described data logger also comprises RTC clock circuit, and described RTC clock circuit and central processing unit are interactive to be connected, and described RTC clock provides real-time clock for data logger.
The described remote update system for electric automobile ECU, described data logger also comprises power circuit, described power circuit provides working power for data logger.
The described remote update system for electric automobile ECU, described serial communication interface is RS232 serial communication interface.
For a method for remote updating of electric automobile ECU, the method comprises the following steps:
(1) the transmission computer of remote data center sends to the new user program that is kept in advance vehicle-mounted end ECU wherein the GPRS data collector of vehicle-mounted end by the Internet network platform and mobile network platform;
(2) described GPRS data collector sends to data logger by the new user program receiving by universal serial bus, and data logger carries out verification to the new user program data that receive, and data correct verification are saved in its inner TF card;
(3), after data logger receives the instruction that need to upgrade to the user program in ECU, the user program being kept in self TF card is sent to ECU by CAN bus;
(4) in described ECU, programming in advance has boot, ECU carries out electrification reset, utilize boot to determine whether to carry out the renewal of user program, if, receive the user program from data logger by CAN bus, and be written in inner FLASH space of specifying, complete online updating.
The described method for remote updating for electric automobile ECU, in described step (3), data logger, according to different more fresh targets, sends corresponding id information command frame, when data logger receives after the confirmation instruction that target ECU returns, carry out data and send continuously.
As shown from the above technical solution, the present invention is based on wireless digital communication, the file that needs are write sends the ECU to be updated of vehicle-mounted end to by the Internet network platform, mobile network platform, GPRS data collector, data logger and CAN bus, ECU to be updated wipes inner FLASH space, the program binary file receiving is write to FLASH space assigned address, realize the remote update of vehicle-mounted ECU program, thereby make depot or ECU supplier's program maintenance more convenient, improved technical guarantee level.
Accompanying drawing explanation
Fig. 1 is the structural representation of the specific embodiment of the invention;
Fig. 2 is the internal structure schematic diagram of specific embodiment of the invention data logger;
Fig. 3 is the spatial distribution map of specific embodiment of the invention ECU internal storage;
Fig. 4 is the inner boot operational flow diagram of specific embodiment of the invention ECU.
Embodiment
Further illustrate the present invention below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, a kind of remote update system for electric automobile ECU, comprise the transmission computer 1 and the GPRS data collector 4 of being located at vehicle-mounted end, data logger 5 and the ECU7 that are located at remote data center, ECU7 herein makes a general reference the electronic control units such as car load control unit 71, instrument display unit 72, battery management unit 73 etc.Transmission computer 1 is connected with GPRS data collector 4 is interactive with mobile network platform 3 by the Internet network platform 2, and GPRS data collector 4 is connected with data logger 5 is interactive, and data logger 5 is connected with ECU7 is interactive by CAN bus 6.
As shown in Figure 2, data logger 5 comprises central processing unit 51, serial communication interface 52, CAN communication interface 53, TF card interface 54, TF card 55, RTC clock circuit 56 and power circuit 57.Central processing unit 51 is connected with GPRS data collector 4 is interactive by RS232 serial communication interface 52, and central processing unit 51 is connected with CAN bus 6 is interactive by CAN communication interface 53, and central processing unit 51 is connected with TF card 55 is interactive by TF card interface 54.RTC clock 56 provides real-time clock for data logger 5, and RTC clock circuit 56 is connected with central processing unit 51 is interactive.Power circuit 57 provides working power for data logger 5.
For a method for remote updating of electric automobile ECU, comprise the following steps:
The transmission computer of S1, remote data center is connected with the Internet network platform, and set up wireless link by the Internet network platform and mobile network platform, GPRS data collector is set up wireless connections by mobile network platform with transmission computer and is carried out transfer of data;
The data that the transmission computer that GPRS data collector is received sends over by the Internet network platform and mobile network platform, send to ECU by data logger and CAN bus; In the time of Vehicle Driving Cycle, the real time data of the vehicle operating that the ECU that GPRS data collector is received sends over by CAN bus and data logger, sends to the transmission computer of remote data center by mobile network platform and the Internet network platform.
The data that the GPRS transceiver that S2, data logger receive it sends over are carried out verification, and data correct verification are saved in its inner TF card; In the time of Vehicle Driving Cycle, data logger carries out non-volatile recording and is saved in real time in its inner TF card the real time data of vehicle operating as required.
The effect of data logger is equivalent to an information transfer mechanism, the data that GPRS transceiver sends over are imported the central processing unit of data logger into by RS232 serial communication interface, central processing unit carries out verification to the data that receive, and by TF card interface, data correct verification are written in a file in TF card and are preserved (s19 file), complete remote data packets receiving course.Verification is that the every a line s19 file data to receiving carries out total check, the low byte of its cumulative sum and transmit leg are passed to the verification of coming and compare, whether make mistakes with validate data transmissions, if comparison result is identical, show that transfer of data is correct, otherwise return data error message, requires transmit leg to resend the row data.
The RTC clock of data logger inside provides real-time clock for data logger, in the time of Vehicle Driving Cycle, the operation information of vehicle imports the central processing unit of data logger into by CAN communication interface, data logger carries out non-volatile recording and is saved in real time in its inner TF card the real time data of vehicle operating as required, the data of record comprise the parameters such as current time, voltage, electric current, temperature, power output, output state, so that technical staff analyzes.
The program updates instruction that S3, GPRS data collector are received sends to data logger by universal serial bus, and data logger is read the s19 file being kept in TF card, and is transferred in CAN bus network with corresponding CAN id information; ECU to be updated receives this CAN id information, after confirming it and command information itself conforming to, replys and receives continuously data, and the data that receive are written to inner FLASH memory designated space of specifying, and completes download online.
When data logger receives after the program updates instruction that GPRS data collector sends over, according to different more fresh targets, send corresponding id information command frame, as car load control unit ID=0X18FF0001, instrument display unit ID=0X18FF0002, battery management unit ID=0X18FF000X, when data logger receives after the return instruction of ECU to be updated, carries out continuous data transmission.Be kept at packet in TF card and preserve by row, each row of data comprise packet header, string length, writing address, continuous data bag, verification and.Continuous data byte is split into several continuous data frames by data logger, sends in CAN bus.In CAN bus, corresponding ECU receives after these data, by protocol requirement, it is processed, and writes inner FLASH space.
The memory headroom of ECU internal microprocessor distributes as shown in Figure 3, the microprocessor of different model, its memory headroom distributes roughly the same, its memory size be 16KB, 32 KB, 64 KB, 128 KB, 256 KB, 512 KB not etc.Memory headroom is respectively register space, EEPROM space, FLASH space, ram space from low to high, directly accesses FLASH space (0x4000～0x8000), divides access to web page FLASH space, directly accesses FLASH space (0xC000～0xFFFF, wherein, 0xFF00～0xFFFF is interrupt vector table space).
Register takies the address space of 1～2KB in internal memory; EEPROM also takies the address space of 1～2KB in internal memory, is used for preserving the service data that can not lose after some power down, as the various configuration parameters of using in automobile control; The microprocessor of different model has the ram in slice of different capabilities, has (taking address space are 0x2000～0x4000) such as 2KB, 4KB, 8KB.
The 48KB of 0x4000～0xFFFF is FLASH space, is divided into three parts, every part 16KB, wherein, 0x4000～0x8000 directly accesses FLASH space, and 0x8000～0xC000, for a point access to web page FLASH space, can shine upon different FLASH spaces, as 64KB, 128KB, 256KB, 512KB etc., 0xC000～0xFFFF directly accesses FLASH space, comprises program designation space and interrupt vector table space.
As shown in Figure 4, after the microprocessor of ECU inside re-powers or is reset, first the ram space that is 0x2000 by BootLoader program copy to initial address, move subsequently the Boot_main program in BootLoader program, to hardware be configured, initialization MSCAN module, and wait for CAN interrupt, if do not receive CAN Download Info within the corresponding time, Boot_main program can overtimely exit, and jumps to the entry address of main program, removes to carry out user application; If receive the command information that CAN downloads within the corresponding time, Boot_main program jumps to erasable FLASH space place, direct access FLASH and a point access to web page FLASH are wiped to i.e. 0x4000～0x8000 in Fig. 3,0xC000～0xF000 and 0x8000～0xC000 space.After wiping, wait for CAN receive interruption, and carry out corresponding data receiver, the data that receive are carried out to verification, in the time that data check is correct, return to verification frame data of transmit leg; After each row of data receives, the data that receive are processed, find out data write initial address, data length, verification and etc., and data file is wherein written to the FLASH space of appointment; After writing a line and finishing, Boot_main program is returned to an end frame, and starts to receive next line, until after entire packet receives and finish, exit present procedure, and turn back to user application.
Boot (BootLoader), code space is about about 2KB, and its storage address is the 0xF000～0xFF00 directly accessing in FLASH, and this space is protected boot sector, even repeatedly also can not be wiped free of when BootLoader at CAN.When BootLoader program is downloaded to behind 0xF000～0xFF00 space of microprocessor, except the shared 0xFF00～0xFFFF space of interrupt vector table, this space is the space, superlatively location of microprocessor internal direct addressin, user application can not cover this space while download, and personal code work only takies 0x4000～0x8000 or 0xC000～0xF000 space and paging reference address space 0x8000～0xC000.User can distribute different memory headroom addresses according to the code space size of oneself.
The above execution mode is only that the preferred embodiment of the present invention is described; not scope of the present invention is limited; design under the prerequisite of spirit not departing from the present invention; various distortion and improvement that those of ordinary skills make technical scheme of the present invention, all should fall in the definite protection range of claims of the present invention.
Claims (8)
1. the remote update system for electric automobile ECU, comprise the transmission computer of being located at remote data center and the ECU that is located at vehicle-mounted end, it is characterized in that: also comprise GPRS data collector and the data logger of being located at vehicle-mounted end, described transmission computer is connected with mobile network platform and GPRS data collector are interactive by the Internet network platform, described GPRS data collector is connected with data logger is interactive, and described data logger is connected with ECU is interactive by CAN bus.
2. the remote update system for electric automobile ECU according to claim 1, it is characterized in that: described data logger comprises central processing unit, serial communication interface, CAN communication interface, TF card interface and TF card, described central processing unit is connected by serial communication interface and GPRS data collector are interactive, described central processing unit is connected by CAN communication interface and automobile CAN-bus are interactive, and described central processing unit is connected by TF card interface and TF card are interactive.
3. the remote update system for electric automobile ECU according to claim 1, is characterized in that: described ECU comprises car load control unit, instrument display unit and battery management unit.
4. the remote update system for electric automobile ECU according to claim 2, it is characterized in that: described data logger also comprises RTC clock circuit, described RTC clock circuit and central processing unit are interactive to be connected, and described RTC clock provides real-time clock for data logger.
5. the remote update system for electric automobile ECU according to claim 2, is characterized in that: described data logger also comprises power circuit, and described power circuit provides working power for data logger.
6. the remote update system for electric automobile ECU according to claim 2, is characterized in that: described serial communication interface is RS232 serial communication interface.
7. for a method for remote updating of electric automobile ECU, it is characterized in that, the method comprises the following steps:
(1) the transmission computer of remote data center sends to the new user program that is kept in advance vehicle-mounted end ECU wherein the GPRS data collector of vehicle-mounted end by the Internet network platform and mobile network platform;
(2) described GPRS data collector sends to data logger by the new user program receiving by universal serial bus, and data logger carries out verification to the new user program data that receive, and data correct verification are saved in its inner TF card;
(3), after data logger receives the instruction that need to upgrade to the user program in ECU, the user program being kept in self TF card is sent to ECU by CAN bus;
(4) in described ECU, programming in advance has boot, ECU carries out electrification reset, utilize boot to determine whether to carry out the renewal of user program, if, receive the user program from data logger by CAN bus, and be written in inner FLASH space of specifying, complete online updating.
8. the method for remote updating for electric automobile ECU according to claim 7, it is characterized in that, in described step (3), data logger is according to different more fresh targets, send corresponding id information command frame, when data logger receives after the confirmation instruction that target ECU returns, carry out data and send continuously.
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| CN104149717A (en) * | 2014-07-31 | 2014-11-19 | 北京中瑞蓝科电动汽车技术有限公司 | Remote non-interference updating system and remote non-interference updating method for vehicle control |
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| CN106790233A (en) * | 2017-01-17 | 2017-05-31 | 北京经纬恒润科技有限公司 | The application program method for refreshing and device of a kind of ECU |
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| CN108334282B (en) * | 2017-12-28 | 2021-07-09 | 宁德时代新能源科技股份有限公司 | Method and device for downloading program file of automobile electronic control unit |
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| CN109379231A (en) * | 2018-11-13 | 2019-02-22 | 安徽芯核防务装备技术股份有限公司 | A kind of fire detector remote upgrade method and device based on CAN communication |
| CN110096230A (en) * | 2019-04-12 | 2019-08-06 | 奇瑞新能源汽车技术有限公司 | A kind of updated driving data record system and method for controller |
| CN114047715A (en) * | 2021-09-30 | 2022-02-15 | 黄冈普赫氢能商用车有限公司 | Control method of peripheral device during software update of ECU application layer and storage medium |
| CN114047715B (en) * | 2021-09-30 | 2023-11-03 | 黄冈普赫氢能商用车有限公司 | Control method and storage medium for peripheral device during ECU application layer software update |
| CN114563995A (en) * | 2022-01-17 | 2022-05-31 | 潍柴动力股份有限公司 | Reset detection method, device and equipment of electronic control unit and storage medium |
| CN114563995B (en) * | 2022-01-17 | 2024-03-19 | 潍柴动力股份有限公司 | Reset detection method, device, equipment and storage medium of electronic control unit |
| CN115602943A (en) * | 2022-12-15 | 2023-01-13 | 石家庄科林电气股份有限公司（Cn） | Local maintenance method and local maintenance system of battery management system for power energy storage |
| CN115602943B (en) * | 2022-12-15 | 2023-03-10 | 石家庄科林电气股份有限公司 | Local maintenance method and local maintenance system of battery management system for power energy storage |
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