CN106652220A - Electrical vehicle time-sharing rental system and method, and system communication frame - Google Patents

Abstract

The invention discloses an electrical vehicle time-sharing rental system and method, and a system communication frame. The system communication frame comprises a WEB user side, a WEB administrator side, main servers, a sub-server and an electrical vehicle rental APP on a user hand-held terminal. The main servers comprise a member identification servicer, a heartbeat and message pushing server, an APP server, a communication strategy server and a message queue. The APP server and the message queue are both connected with a data caching cluster. For the system communication frame, a message asynchronous communication mode is employed, and each device and each module are connected. The same backstage service is employed by the APP on the IOS platform and the APP on the Android platform, and operation is simplified. The electrical vehicle time-sharing rental system and method, and the system communication frame are suitable for the car rental industry.

Description

Electric automobile timesharing leasing system and method and system communication construction

Technical field

The present invention relates to electric automobile lease field, more particularly, to a kind of electric automobile timesharing leasing system and method and system communication construction.

Background technology

Electric automobile is the vehicle travelled with power wheel with vehicle power as power.Because it possesses good environmental protection characteristic, market occupancy is just incrementally increased, and progresses into industry of hiring a car.Existing automobile leasing business needs to be carried out in particular station, not enough facilitates.Leasing system also lacks suitable communication construction.

State Intellectual Property Office of the People's Republic of China disclosed the patent document of entitled " a kind of electric automobile lease management system and its management of leasing method based on charging pile " on 01 14th, 2015（Publication number：CN104282088A）, it includes system remote management control center, electric automobile, charging pile and intelligent terminal；Car battery data acquisition module, wireless communication module and intelligent control module are installed on the electric automobile；Intelligent control unit and communication module, the intelligent terminal and system remote management control center radio communication, wireless communication module and the system remote management control center radio communication of the electric automobile are installed on the charging pile.This scheme fails to disclose suitable communication construction, and this management system needs artificial participation per single lease, it is impossible to realize self-service leasehold mode.

The content of the invention

The present invention mainly solves the technical problem for lacking the more manual intervention of suitable communication construction, management system needs etc. existing for prior art, a kind of reasonable, efficient electric automobile timesharing leasing system communication construction is provided, while providing a kind of electric automobile timesharing leasing system and method that can realize self-service lease based on this communication construction.

The present invention is mainly addressed for above-mentioned technical problem by following technical proposals：A kind of electric automobile timesharing leasing system communication construction, including the lease APP of the electric automobile on WEB user sides, WEB keepers end, main service, sub-services and user's handheld terminal, the main service includes member authentication service, heartbeat and message push service, APP services, communication strategy service and message queue；APP is serviced and message queue is all connected with data buffer storage cluster；

The lease APP of the electric automobile on user's handheld terminal can carry out other operations to member authentication server initiation logging request and after verification passes through；The lease APP of the electric automobile on user's handheld terminal is to APP service origination requests and obtains data；The lease APP timings of the electric automobile on user's handheld terminal initiate request to heartbeat and message push service, and the lease APP state notifyings of the electric automobile on user's handheld terminal main service is given；When the lease APP of the electric automobile on user's handheld terminal is exited, to member authentication service initiation request is exited；

The logging request that the lease APP of the electric automobile on member authentication service receive user handheld terminal is initiated, and whether verify the username and password of member legal；After verification passes through, member authentication service is saved in member's logging status database this session data for logging in；

The heartbeat packet of the lease APP of the electric automobile in heartbeat and message push service receive user handheld terminal, and the state of the lease APP of the electric automobile on user's handheld terminal is saved in member's logging status database, and the message for needing the lease APP of the electric automobile being pushed on user's handheld terminal is sent into the lease APP of the electric automobile on user's handheld terminal；

The type of service of the request of the lease APP of the electric automobile on APP service based on subscriber handheld terminals is operated：A, for operating database is needed, to data base read-write data；For the instruction that the lease APP of the electric automobile on user's handheld terminal is issued to the lease APP of the electric automobile on on-board information platform, APP services are from the concrete corresponding sub-services of communication strategy service acquisition instruction, then to single instrction under this sub-services, and result to be returned is waited, then result is returned to the lease APP of the electric automobile on user's handheld terminal；

The request of member is sent to APP services by WEB user sides by Http agreements, then wait-for-response data；

WEB keepers end to operation maintenance personnel provides service, and by connecting database the read-write operation of data is carried out；

Communication strategy service is used to obtain the corresponding sub-services of lease APP of the electric automobile on on-board information platform；

Message queue is used for the storage and distribution of message, when sub-services or WEB keepers end need to be deducted fees or sent note, to message queue message is write.

Preferably, electric automobile timesharing leasing system communication construction also includes the lease APP of the electric automobile in charging pile management module and on-board information platform；

Sub-services receive the Tcp length connection of the lease APP initiations of charging pile management module and the electric automobile on on-board information platform, and the request to the lease APP initiations of charging pile management module and the electric automobile on on-board information platform is responded；Sub-services read instruction message from message queue, instruction is assigned to the lease APP of the electric automobile in charging pile management module and on-board information platform, and receives implementing results of the lease APP of charging pile management module and the electric automobile on on-board information platform to instruction；Sub-services service the implementing result of return instruction to APP；

The lease APP of the electric automobile on on-board information platform to sub-services initiate the long connection requests of Tcp；The long interface channels of Tcp that the service request or background request that member is initiated by the lease APP of the electric automobile on on-board information platform passes through to have set up issue sub-services；The lease APP of the electric automobile on on-board information platform obtains the response data that sub-services are beamed back；The lease APP of the electric automobile on on-board information platform receives the instruction that sub-services are assigned, and is performed by car machine system, and implementing result is returned sub-services；

Charging pile management module receives the instruction that sub-services send, and performs.

Charging pile management module is used to charging, preengage the management of the aspect such as charge, the lease APP of the electric automobile on on-board information platform for user and central server interaction.

Preferably, the main service also includes the service of deducting fees and short message service, when the service of deducting fees needs to be transmitted note, to message queue message is write；

The message of deducting fees in message queue is read in the service of deducting fees, and then carries out computing of deducting fees；

The short message in message queue is read in short message service, and by Short Message Service Gateway note is sent.

The service of deducting fees is used for the process of expense, and short message service is used to for various information to notify user.

This communication construction is attached each equipment and module by the way of message asynchronous communication.The APP of the ios platform and APP of Android platform adopts identical background service, simplifies operation.Data buffer storage cluster can improve systematic function and reliability.By certain strategy, App services and sub-services direction communication, intermediate link is reduced, improve systematic function and reduce system pressure.

A kind of electric automobile timesharing leasing system, for the lease of electric automobile, it includes central server, several child servers, user's handheld terminal of the lease APP of electric automobile is installed, the access terminal of connection internet, several are equipped with the automobile charging pile and the timesharing leasing system being disposed on each electric automobile of communication and processing meanss, user's handheld terminal and access terminal are communicated to connect with described central server, the child servers are communicated to connect with described central server, the child servers are communicated to connect respectively with several automobile charging piles, timesharing leasing system on each electric automobile is communicated to connect with described child servers, the timesharing leasing system includes vehicle communication device, for collecting vehicle information and the on-board information platform for processing, information reader unit for authentication and the vehicle control module that car door and power are controlled, described information reader unit, vehicle control module and vehicle communication device are connected with described on-board information platform, the on-board information platform is communicated to connect by vehicle communication device with child servers.

The present invention realizes the linkage of whole timesharing leasing system by onboard pre-installing the hardware Android inter-vehicle information system and GPRS module that are capable of achieving telecommunication and wagon control.By the management of charging pile, binding, charging pile condition managing and the control of charging pile and car are realized.By the way that whole leasing system is subdivided into operation system, communication system and each child resource management system, the stable of system, reliability, security and business fluency are realized, lift treatment effeciency.The process of in-car charter business logic is processed by GPRS module, is realized by embedded software, reliable, stable.By mobile phone A PP, the APP of inter-vehicle information system, the diversity with user interaction is realized, strengthen Consumer's Experience.By the binding of mobile phone A PP account and member's card number, realization can be hired a car by member card and mobile phone A PP two ways, and can cross-reference, realize linkage.By the way that user data is registered in GPRS module, local wagon control is realized, the pattern of backstage charging had both enhanced the response speed of vehicle end, and in turn, ensured that the stability of metering data.

Preferably, the on-board information platform is with display and interactive function, the intelligent control device for being provided with intelligent operating system and being connected with electric automobile bus；The on-board information platform includes message processing module, charter business module, information exchange module, vehicle query reservation module, charging pile query-reservation module and module of returning the car, and the charter business module, information exchange module, vehicle query reservation module, charging pile query-reservation module and module of returning the car are connected with described message processing module.These are software module, and correspondence corresponding function is processed in on-board information platform.

On-board information platform can be provided with Android system, the main interactive interface that user and Car Rental are provided, user can complete lease and confirm and business of returning the car by this system, remind while user being alternatively during vehicle runs and providing charging pile, electricity early warning etc..

Preferably, the vehicle communication device is GPRS module, described information reader unit is RFID card reader module, and the timesharing leasing system also includes indicator lamp reminding module, and the indicator lamp reminding module is electrically connected with described on-board information platform.

Indicating lamp module reminds user's related service information such as by indicator lamp and voice message：Vehicle can be rented, and vehicle is reserved, and vehicle can not be rented.GPRS module, GPRS module is the communication module of vehicle and backstage, while also supporting the core logic of whole charter business, such as storage ID, performs opening car door instruction of swiping the card, execution car locking instruction etc..

As preferred, the automobile charging pile is in each infield with the installation of charging pile cluster form, each charging pile cluster is mounted on a cluster controller and a GPRS terminal, the GPRS terminals are electrically connected with the cluster controller of place infield, charging pile described in each includes RFID card reader and ground lock, the RFID card reader and ground lock are electrically connected with described cluster controller, the cluster controller is connected by GPRS terminals with described child servers communication, and each GPRS terminal is the GPRS terminals with storage chip.

Charging pile is managed using trunking mode, and single charging pile possesses basic charge function, and possessing lockable mechanism prevents charging plug from being extracted by the non-personnel of swiping the card.The built-in RFID card reader module of charging pile, realizes user identity identification function.Charging pile connection ground lock module, can control the lifting of ground lock by RFID card reader.GPRS terminals are connected on cluster controller, realize the communication with charging pile management system.

As preferred, charter business module is installed in the electric automobile timesharing leasing system, charter business module includes charter business logic and business conduct module on central server, member management module on central server, vehicle information management module on central server, charging pile management module on cluster controller, the lease APP of the electric automobile on user's handheld terminal, the lease APP of the electric automobile on on-board information platform, access the WEB user sides in terminal and WEB keepers end, charter business logic and business conduct module respectively with member's management module, vehicle information management module, charging pile management module, the lease APP of the electric automobile on user's handheld terminal, the lease APP of the electric automobile on on-board information platform, access the WEB user sides in terminal and the connection of WEB keepers end.

The classification of member management module management member, integration, rank and personal information etc., membership management system provides data-interface for each business, supports the two-way interactive of data.

Vehicle information management module is the unique communication platform that vehicle information management system is vehicle management, and timesharing leasing system need to obtain vehicle location and status information by vehicle information management system, and realize the both-way communication of business information.Charging pile management module realizes the remote monitoring with charging pile, and this module carries out data exchange by interface and charter business module.Realize charging pile condition monitoring, binding, charging pile power-off, the control of energization of car precharge stake.Charter business module, realizes whole charter business logic and business conduct, is the core of whole leasing system.The inquiry of vehicle/charging pile, reservation are realized in mobile phone terminal APP, the support of Personal Rental's business, are returned the car extremely, information pushing, the function such as services of roaming are handled.The lease APP of the electric automobile on user's handheld terminal can realize business support during lease, realize information exchange, vehicle/charging pile inquiry, reservation, the function such as return the car.Web user end can realize that user account is managed, and information management, miscellaneous service is handled, the function such as charter business issue.Web administrator end can realize the functions such as vehicle, charging pile maintenance, charging setting, vehicle state monitoring and threshold value setting, information issue.

As preferred, membership information management two-way interactive data-interface is provided with the member management module, the lease APP of the electric automobile on the on-board information platform is arranged in message processing module, the lease APP of the electric automobile on on-board information platform includes vehicle location functional module, car status information functional module and business information both-way communication interface, the vehicle location functional module, car status information functional module and business information both-way communication interface are connected with described charter business logic and business conduct module, charging pile management module includes charging pile management system interface, charging pile monitoring module, the predetermined charging pile binding module of car, the powered off and on management module of charging pile, the charging pile monitoring module, the predetermined charging pile binding module of car, the powered off and on management module of charging pile is connected by electric stake management system interface with charter business logic and business conduct module.

As preferred, the WEB user sides include user account management module, information management module, business handling module and charter business release module, the user account management module, information management module, business handling module and charter business release module are connected with described charter business logic and business conduct module, the WEB keepers end includes vehicle maintenance module, charging pile is safeguarded, charging setup module, vehicle state monitoring and threshold value setting module and information issuing module, the vehicle maintenance module, charging pile is safeguarded, charging setup module, vehicle state monitoring and threshold value setting module and information issuing module are connected with described charter business logic and business conduct module.

A kind of electric automobile timesharing rent method, including user account management method, rent returning method and charging management method；User account management method includes the registration of user, nullifies and synchronous；

Renting returning method includes：Central server receives control signal and performs corresponding steps, step of returning the car of hiring a car is performed when central server is received hire a car and return the car signal, when central server receive reservation hire a car signal when perform reservation and hire a car step, reservation charge step is performed when central server receives reservation charging signals, when central server receive strange land hire a car signal when perform strange land and hire a car step；

Charging management method includes：Charging pile obtains the current electric motor car information stopped and sends to central server, central server carries out electricity and calculates and assign time-sharing charging control command according to electric motor car current vehicle condition and ambient parameter, and charging pile carries out time-sharing charging to the current electric motor car for stopping.

Operation on central server has main service, and operation in child servers has sub-services.

The method that present invention employs timesharing lease, employs positive time-sharing charging rent method, with reference to local peak-trough electricity electricity price and electricity consumption strategy, while without prejudice to is normally hired a car and returned the car, substantially reduces electric cost.

As preferred, being registered as of user is input into ID into GPRS terminals or GPRS module, the cancellation of user is to delete input to the ID in GPRS terminals or GPRS module, and server timing centered on the synchronization of user synchronizes all GPRS terminals or the ID in GPRS module.

It is the ID of user to be brushed into the storage chip of GPRS terminals in user's registration system design, ID is verified when user hires a car and realizes business of hiring a car, swipe the card when ensureing that user hires a car and do not postpone sense, user log off is on the contrary with user's registration, for exiting or because other reasonses cancel the member of timesharing charter business, system needs to will be stored in charging pile and the ID of vehicle GPRS terminals is nullified.Then user's synchronization is performed, system possesses the function of Timing Synchronization data, it is ensured that the ID of vehicle and charging pile GPRS terminals is last state.

Preferably, the step of returning the car of hiring a car includes：

Information reader unit Card Reader, on-board information platform judges current vehicle condition, vehicle control module refusal opening car door, end of hiring a car if current vehicle condition does not meet unlocking condition；

Locked door by vehicle control module solution if current vehicle condition meets unlocking condition, user is into the car, simultaneously, on-board information platform transmits current Card Reader data to central server, central server returns user account information to vehicle communication device, if central server returns user account information for Sorry, your ticket has not enough value, vehicle control module closes vehicle power power supply, terminates to hire a car after on-board information platform prompting；

If it is that remaining sum is sufficient that central server returns user account information, vehicle control module unlocking vehicle electrical source of power then is carried out hiring a car using by user；

After user is stopped, on-board information platform shows selection information, user swipes the card or sends order to vehicle control module using handheld terminal if user is temporary parking carries out door operation, if user is operation of returning the car, then user selects to return the car and order and swipes the card at charging pile in on-board information platform, charging pile is bound with vehicle, and user returns the car.

In the present invention, hire a car return the car service logic/flow process be whole system core, the setting of the present invention possesses the function of member card verification, must assure that the user prestored in only vehicle and charging pile GPRS terminals just can hire a car, system in the present invention supports that according to the actual requirements user rents many cars or restriction user only rents a car, and the binding of vehicle and charging pile is realized in communication when user returns the car by car with charging pile.

Preferably, the reservation is hired a car, step includes：

User searches free vehicle by handheld terminal or WEB client side, the reservation that transmission reservation is hired a car hires a car signal to central server, the central server sends reservation and hires a car signal to designated vehicle, and synchronized transmission preengages the charging pile that signal of hiring a car is bound to vehicle

If setting subscription time in, user fail execution hire a car return the car step or on non-designated vehicle perform hire a car return the car step then send cancellation reservation hire a car signal to designated vehicle.

Preferably, the reservation charge step includes：

User searches the electricity of free vehicle and corresponding vehicle by handheld terminal or WEB client side, sending subscription time requires the reservation signal of reservation charging to central server, the central server sends reservation charging signals to designated vehicle, and the charging pile that synchronized transmission reservation charging signals are bound to vehicle

If setting subscription time in, user fail execution hire a car return the car step or on non-designated vehicle perform hire a car return the car step then send cancellation reservation charging signals to designated vehicle.

Present invention achieves preengaging priority principle, vehicle locks subscriber Jing after reservation, and other users cannot again lease this vehicle, and the limited time of reservation is determined.If having leased other vehicles after the time-out of user's reservation simultaneously or reservation, reservation is cancelled automatically.Same reservation strategy can also be supported including charging pile.

Preferably, the strange land is hired a car, step includes：

Area code is added in registration, cancellation and synchronization in user；Corresponding automobile charging pile and timesharing leasing system are also provided with area code,

When user proposes that strange land is hired a car after application to central server by handheld terminal or WEB client side, the area code of central server parsing destination address and then will propose that the hire a car ID of application of strange land is input into the GPRS terminals or GPRS module of destination address and performs synchronizing step.Present invention employs the method for limiting area by means of car, it is determined that by means of car scope, it is therefore prevented that on a large scale with the generation that region car stressful situation is appraised and decided caused by car.

Preferably, in charging management method, the charging pile is that, using peak-trough electricity charging charging pile, if current time is in paddy electricity chargeable time, charging pile is charged to electric automobile,

If current time is in peak electricity chargeable time, then central server is operated according to the car status information that on-board information platform in the vehicle of charging pile current bindings is uploaded to charging pile, if current bindings vehicle judges through charging, it is judged to that then charging pile is charged to electric automobile for needs charging, if it is determined that to forbid charging, then charging pile stops being charged electric automobile

Charging judges that step includes following sub-step：

Charging judges sub-step one, and assignment one basic power threshold and a basic quantity coefficient value of the central server to each charging pile, basic power threshold calculates setting with basic quantity coefficient value by artificial or central server,

Charging judges sub-step two, and central server reads the battery electric quantity value of current time, paddy electricity chargeable time opening time and Current vehicle, and central server calculates current time and draws time difference with paddy electricity chargeable time open-interval difference,

Charging judges sub-step three, basic quantity coefficient value is then judged to forbid charging plus the battery electric quantity value of Current vehicle divided by the numerical value drawn after time difference more than or equal to described basic power threshold, and the numerical value drawn after basic quantity coefficient value is divided by time difference is judged to need to charge if being less than the basic power threshold plus the battery electric quantity value of Current vehicle.After so arranging, different regions correspondence is reached different by means of car basis power threshold, namely allow more by means of the larger charging pile charging of car frequency, holding electricity as much as possible, most people is enabled to borrow car as much as possible, both the demand of vehicle electricity had been take into account, it is also contemplated that the demand that vehicle is used, the financial cost of satisfaction and the double requirements of use cost.

As preferred, in charging judges sub-step, the average of correspondence date is multiplied by given percent coefficient and draws electricity correction value by means of train number number in the last measurement period of charging pile, and basic power threshold is drawn by basic charge value plus electricity correction value, and the basic charge value is unified numerical value.So arrange, it is different by means of car basis power threshold to have reached different regions correspondence, that is, allow and charged more, holding electricity as much as possible by means of the larger charging pile of car frequency so that most people can as much as possible borrow car.

If preferably, having the distance of some vehicle parkings within 200 meters, comparing the voltage value of Adjacent vehicles, central server is being judged to need to be started to charge up successively from high to low with electricity in the vehicle for charging.It is of the invention so to arrange, ensure that vehicle is rapidly completed charging and can use as far as possible, while also having made rational planning for the charging interval, save cost.

The present invention substantial effect be：Communication construction is interconnected each module and equipment, is made system high efficiency, is stablized, safely runs, and using data buffer storage cluster, that is, improves systematic function, also ensure that the reliability of system；Communication construction reduces system coupling by the way of message queue.By certain strategy, App services and sub-services direction communication, intermediate link is reduced, improve systematic function and reduce system pressure.

The present invention realizes the linkage of whole timesharing leasing system by onboard pre-installing the hardware Android inter-vehicle information system and GPRS module that are capable of achieving telecommunication and wagon control.By the management of charging pile, binding, charging pile condition managing and the control of charging pile and car are realized.By the way that whole leasing system is subdivided into operation system, communication system and each child resource management system, the stable of system, reliability, security and business fluency are realized, lift treatment effeciency.The process of in-car charter business logic is processed by GPRS module, is realized by embedded software, reliable, stable.By mobile phone A PP, the APP of inter-vehicle information system, the diversity with user interaction is realized, strengthen Consumer's Experience.By the binding of mobile phone A PP account and member's card number, realization can be hired a car by member card and mobile phone A PP two ways, and can cross-reference, realize linkage.By the way that user data is registered in GPRS module, local wagon control is realized, the pattern of backstage charging had both enhanced the response speed of vehicle end, and in turn, ensured that the stability of metering data.The method that present invention employs timesharing lease, employs positive time-sharing charging rent method, with reference to local peak-trough electricity electricity price and electricity consumption strategy, while without prejudice to is normally hired a car and returned the car, substantially reduces electric cost.The setting of the present invention possesses the function of member card verification, must assure that the user prestored in only vehicle and charging pile GPRS terminals just can hire a car, system in the present invention supports that according to the actual requirements user rents many cars or restriction user only rents a car, and the binding of vehicle and charging pile is realized in communication when user returns the car by car with charging pile.Present invention achieves preengaging priority principle, vehicle locks subscriber Jing after reservation, and other users cannot again lease this vehicle, and the limited time of reservation is determined.If having leased other vehicles after the time-out of user's reservation simultaneously or reservation, reservation is cancelled automatically.Same reservation strategy can also be supported including charging pile.Present invention employs the method for limiting area by means of car, it is determined that by means of car scope, it is therefore prevented that on a large scale with the generation that region car stressful situation is appraised and decided caused by car.Different regions correspondence is reached different by means of car basis power threshold, namely allow more by means of the larger charging pile charging of car frequency, holding electricity as much as possible, most people is enabled to borrow car as much as possible, both the demand of vehicle electricity had been take into account, it is also contemplated that the demand that vehicle is used, the financial cost of satisfaction and the double requirements of use cost.

Description of the drawings

Fig. 1 is a kind of electric automobile timesharing leasing system communication construction schematic diagram of the present invention；

In figure：1st, WEB user sides, 2, WEB keepers end, 3, main service, 4th, sub-services, 5, the lease APP of electric automobile on user's handheld terminal, 6, the lease APP of electric automobile on on-board information platform, 7th, charging pile management module, 8, data buffer storage cluster, 9, member's logging status database, 31st, member authentication service, 32, heartbeat and message push service, 33, APP service, 34th, message queue, 35th, the service of deducting fees, 36, short message service, 37, communication strategy service.

Specific embodiment

Below by embodiment, and accompanying drawing is combined, technical scheme is described in further detail.

Embodiment：A kind of electric automobile timesharing leasing system communication construction of the present embodiment, as shown in Figure 1, the lease APP6 of the electric automobile on lease APP5, charging pile management module 7 and on-board information platform including the electric automobile on WEB user sides 1, WEB keepers end 2, main service 3, sub-services 4, user's handheld terminal, the main service includes member authentication service 31, heartbeat and the service 33, message team 34 of message push service 32, APP, service 35 of deducting fees, short message service 36 and communication strategy service 37；APP is serviced and message queue is all connected with data buffer storage cluster 8；

The lease APP of the electric automobile on user's handheld terminal can carry out other operations to member authentication server initiation logging request and after verification passes through；The lease APP of the electric automobile on user's handheld terminal is to APP service origination requests and obtains data；The lease APP timings of the electric automobile on user's handheld terminal initiate request to heartbeat and message push service, and the lease APP state notifyings of the electric automobile on user's handheld terminal main service is given；When the lease APP of the electric automobile on user's handheld terminal is exited, to member authentication service initiation request is exited；

The logging request that the lease APP of the electric automobile on member authentication service receive user handheld terminal is initiated, and whether verify the username and password of member legal；After verification passes through, member authentication service is saved in member's logging status database 9 this session data for logging in；

The heartbeat packet of the lease APP of the electric automobile in heartbeat and message push service receive user handheld terminal, and the state of the lease APP of the electric automobile on user's handheld terminal is saved in member's logging status database, and the message for needing the lease APP of the electric automobile being pushed on user's handheld terminal is sent into the lease APP of the electric automobile on user's handheld terminal；

The type of service of the request of the lease APP of the electric automobile on APP service based on subscriber handheld terminals is operated：A, for operating database is needed, to data base read-write data；For the instruction that the lease APP of the electric automobile on user's handheld terminal is issued to the lease APP of the electric automobile on on-board information platform, APP services are from the concrete corresponding sub-services of communication strategy service acquisition instruction, then to single instrction under this sub-services, and result to be returned is waited, then result is returned to the lease APP of the electric automobile on user's handheld terminal；

The request of member is sent to APP services by WEB user sides by Http agreements, then wait-for-response data；

WEB keepers end to operation maintenance personnel provides service, and by connecting database the read-write operation of data is carried out；

Communication strategy service is used to obtain the corresponding sub-services of lease APP of the electric automobile on on-board information platform；

Message queue is used for the storage and distribution of message, when sub-services or WEB keepers end need to be deducted fees or sent note, to message queue message is write.

Sub-services receive the Tcp length connection of the lease APP initiations of charging pile management module and the electric automobile on on-board information platform, and the request to the lease APP initiations of charging pile management module and the electric automobile on on-board information platform is responded；Sub-services read instruction message from message queue, instruction is assigned to the lease APP of the electric automobile in charging pile management module and on-board information platform, and receives implementing results of the lease APP of charging pile management module and the electric automobile on on-board information platform to instruction；Sub-services service the implementing result of return instruction to APP；

The lease APP of the electric automobile on on-board information platform to sub-services initiate the long connection requests of Tcp；The long interface channels of Tcp that the service request or background request that member is initiated by the lease APP of the electric automobile on on-board information platform passes through to have set up issue sub-services；The lease APP of the electric automobile on on-board information platform obtains the response data that sub-services are beamed back；The lease APP of the electric automobile on on-board information platform receives the instruction that sub-services are assigned, and is performed by car machine system, and implementing result is returned sub-services；

Charging pile management module receives the instruction that sub-services send, and performs.

Charging pile management module is used to charging, preengage the management of the aspect such as charge, the lease APP of the electric automobile on on-board information platform for user and central server interaction.

When the service of deducting fees needs to be transmitted note, to message queue message is write；

The message of deducting fees in message queue is read in the service of deducting fees, and then carries out computing of deducting fees；

The short message in message queue is read in short message service, and by Short Message Service Gateway note is sent.

The service of deducting fees is used for the process of expense, and short message service is used to for various information to notify user.

This communication construction is attached each equipment and module by the way of message asynchronous communication.The APP of the ios platform and APP of Android platform adopts identical background service, simplifies operation.Data buffer storage cluster can improve systematic function and reliability.

A kind of electric automobile timesharing leasing system, for the lease of electric automobile, including central server, several child servers, user's handheld terminal of the lease APP of electric automobile is installed, the access terminal of connection internet, several are equipped with the automobile charging pile and the timesharing leasing system being disposed on each electric automobile of communication and processing meanss, user's handheld terminal and access terminal are communicated to connect with described central server, the child servers are communicated to connect with described central server, the child servers are communicated to connect respectively with several automobile charging piles, timesharing leasing system on each electric automobile is communicated to connect with described child servers, the timesharing leasing system includes vehicle communication device, for collecting vehicle information and the on-board information platform for processing, information reader unit for authentication and the vehicle control module that car door and power are controlled, described information reader unit, vehicle control module and vehicle communication device are connected with described on-board information platform, the on-board information platform is communicated to connect by vehicle communication device with child servers.

Operation on central server has main service, and operation in child servers has sub-services.

The information reader unit of authentication can be made up of various wirelessly or non-wirelessly input units, consider with RFID to be optimal from cost and ease for use angle, in addition to RFID, alternative information reader unit can also make fingerprint or eyelid scanning means, vehicle control module is the original controller of vehicle, generally CAN controller collocation ECU, vehicle communication device adopts the 2G communication networks of inexpensive and high protection.

The on-board information platform is with display and interactive function, the intelligent control device for being provided with intelligent operating system and being connected with electric automobile bus.The on-board information platform includes message processing module, charter business module, information exchange module, vehicle query reservation module, charging pile query-reservation module and module of returning the car, and the charter business module, information exchange module, vehicle query reservation module, charging pile query-reservation module and module of returning the car are connected with described message processing module.Message processing module, charter business module, information exchange module, vehicle query reservation module, charging pile query-reservation module and module of returning the car are software module, on-board information platform can be the operation equipment of intelligence system, basic structure is similar with mobile phone or pad, citation form is to be mounted with Android system, add the intelligent operation apparatus of EBI and outer input interface simultaneously, the EBI of addition and outer input interface are added according to vehicle configuration according to the difference of vehicle according to prior art.

The vehicle communication device is GPRS module, and described information reader unit is RFID card reader module, and the timesharing leasing system also includes indicator lamp reminding module, and the indicator lamp reminding module is electrically connected with described on-board information platform.The automobile charging pile is in each infield with the installation of charging pile cluster form, each charging pile cluster is mounted on a cluster controller and a GPRS terminal, the GPRS terminals are electrically connected with the cluster controller of place infield, charging pile described in each includes RFID card reader and ground lock, the RFID card reader and ground lock are electrically connected with described cluster controller, the cluster controller is connected by GPRS terminals with described child servers communication, and each GPRS terminal is the GPRS terminals with storage chip.

Charter business module is installed in the electric automobile timesharing leasing system, charter business module includes charter business logic and business conduct module on central server, member management module on central server, vehicle information management module on central server, charging pile management module on cluster controller, the lease APP of the electric automobile on user's handheld terminal, the lease APP of the electric automobile on on-board information platform, access the WEB user sides in terminal and WEB keepers end, charter business logic and business conduct module respectively with member's management module, vehicle information management module, charging pile management module, the lease APP of the electric automobile on user's handheld terminal, the lease APP of the electric automobile on on-board information platform, access the WEB user sides in terminal and the connection of WEB keepers end.The modules such as charter business module are software module.

Membership information management two-way interactive data-interface is provided with the member management module, the lease APP of the electric automobile on the on-board information platform is arranged in message processing module, the lease APP of the electric automobile on on-board information platform includes vehicle location functional module, car status information functional module and business information both-way communication interface, the vehicle location functional module, car status information functional module and business information both-way communication interface are connected with described charter business logic and business conduct module, charging pile management module includes charging pile management system interface, charging pile monitoring module, the predetermined charging pile binding module of car, the powered off and on management module of charging pile, the charging pile monitoring module, the predetermined charging pile binding module of car, the powered off and on management module of charging pile is connected by electric stake management system interface with charter business logic and business conduct module.

The WEB user sides include user account management module, information management module, business handling module and charter business release module, the user account management module, information management module, business handling module and charter business release module are connected with described charter business logic and business conduct module, the WEB keepers end includes vehicle maintenance module, charging pile is safeguarded, charging setup module, vehicle state monitoring and threshold value setting module and information issuing module, the vehicle maintenance module, charging pile is safeguarded, charging setup module, vehicle state monitoring and threshold value setting module and information issuing module are connected with described charter business logic and business conduct module.

The present embodiment realizes the linkage of whole timesharing leasing system by onboard pre-installing the hardware Android inter-vehicle information system and GPRS module that are capable of achieving telecommunication and wagon control.By the management of charging pile, binding, charging pile condition managing and the control of charging pile and car are realized.By the way that whole leasing system is subdivided into operation system, communication system and each child resource management system, the stable of system, reliability, security and business fluency are realized, lift treatment effeciency.The process of in-car charter business logic is processed by GPRS module, is realized by embedded software, reliable, stable.By mobile phone A PP, the APP of inter-vehicle information system, the diversity with user interaction is realized, strengthen Consumer's Experience.By the binding of mobile phone A PP account and member's card number, realization can be hired a car by member card and mobile phone A PP two ways, and can cross-reference, realize linkage.By the way that user data is registered in GPRS module, local wagon control is realized, the pattern of backstage charging had both enhanced the response speed of vehicle end, and in turn, ensured that the stability of metering data.

A kind of electric automobile timesharing rent method, is used in electric automobile timesharing leasing system as above, including user account management method, rent returning method and charging management method；User account management method includes the registration of user, nullifies and synchronous；

Renting returning method includes：Central server receives control signal and performs corresponding steps, step of returning the car of hiring a car is performed when central server is received hire a car and return the car signal, when central server receive reservation hire a car signal when perform reservation and hire a car step, reservation charge step is performed when central server receives reservation charging signals, when central server receive strange land hire a car signal when perform strange land and hire a car step；

Charging management method includes：Charging pile obtains the current electric motor car information stopped and sends to central server, central server carries out electricity and calculates and assign time-sharing charging control command according to electric motor car current vehicle condition and ambient parameter, and charging pile carries out time-sharing charging to the current electric motor car for stopping.

Being registered as of user is input into ID into GPRS terminals or GPRS module, the cancellation of user is to delete input to the ID in GPRS terminals or GPRS module, and server timing centered on the synchronization of user synchronizes all GPRS terminals or the ID in GPRS module.

The step of returning the car of hiring a car includes：

Information reader unit Card Reader, on-board information platform judges current vehicle condition, vehicle control module refusal opening car door, end of hiring a car if current vehicle condition does not meet unlocking condition；

Locked door by vehicle control module solution if current vehicle condition meets unlocking condition, user is into the car, simultaneously, on-board information platform transmits current Card Reader data to central server, central server returns user account information to vehicle communication device, if central server returns user account information for Sorry, your ticket has not enough value, vehicle control module closes vehicle power power supply, terminates to hire a car after on-board information platform prompting；

If it is that remaining sum is sufficient that central server returns user account information, vehicle control module unlocking vehicle electrical source of power then is carried out hiring a car using by user；

After user is stopped, on-board information platform shows selection information, user swipes the card or sends order to vehicle control module using handheld terminal if user is temporary parking carries out door operation, if user is operation of returning the car, then user selects to return the car and order and swipes the card at charging pile in on-board information platform, charging pile is bound with vehicle, and user returns the car.

The step of hiring a car of preengaging includes：

User searches free vehicle by handheld terminal or WEB client side, the reservation that transmission reservation is hired a car hires a car signal to central server, the central server sends reservation and hires a car signal to designated vehicle, and synchronized transmission preengages the charging pile that signal of hiring a car is bound to vehicle；

If setting subscription time in, user fail execution hire a car return the car step or on non-designated vehicle perform hire a car return the car step then send cancellation reservation hire a car signal to designated vehicle.

The reservation charge step includes：

User searches the electricity of free vehicle and corresponding vehicle by handheld terminal or WEB client side, sending subscription time requires the reservation signal of reservation charging to central server, the central server sends reservation charging signals to designated vehicle, and the charging pile that synchronized transmission reservation charging signals are bound to vehicle；

If setting subscription time in, user fail execution hire a car return the car step or on non-designated vehicle perform hire a car return the car step then send cancellation reservation charging signals to designated vehicle.

Strange land step of hiring a car includes：

Area code is added in registration, cancellation and synchronization in user；Corresponding automobile charging pile and timesharing leasing system are also provided with area code；

When user proposes that strange land is hired a car after application to central server by handheld terminal or WEB client side, the area code of central server parsing destination address and then will propose that the hire a car ID of application of strange land is input into the GPRS terminals or GPRS module of destination address and performs synchronizing step.

In charging management method, the charging pile is that, using peak-trough electricity charging charging pile, if current time is in paddy electricity chargeable time, charging pile is charged to electric automobile；

If current time is in peak electricity chargeable time, then central server is operated according to the car status information that on-board information platform in the vehicle of charging pile current bindings is uploaded to charging pile, if current bindings vehicle judges through charging, it is judged to that then charging pile is charged to electric automobile for needs charging, if it is determined that then charging pile stops being charged electric automobile to forbid charging；

Charging judges that step includes following sub-step：

Charging judges sub-step one, and assignment one basic power threshold and a basic quantity coefficient value of the central server to each charging pile, basic power threshold calculates setting with basic quantity coefficient value by artificial or central server；

Charging judges sub-step two, central server reads the battery electric quantity value of current time, paddy electricity chargeable time opening time and Current vehicle, central server calculates current time and paddy electricity chargeable time open-interval difference and draws time difference, and time difference is being divided into digit；

Charging judges sub-step three, basic quantity coefficient value is then judged to forbid charging plus the battery electric quantity value of Current vehicle divided by the numerical value drawn after time difference more than or equal to described basic power threshold, and the numerical value drawn after basic quantity coefficient value is divided by time difference is judged to need to charge if being less than the basic power threshold plus the battery electric quantity value of Current vehicle.

In charging judges sub-step, the average of correspondence date is multiplied by given percent coefficient and draws electricity correction value by means of train number number in the last measurement period of charging pile, basic power threshold is shown that the basic charge value is unified numerical value by basic charge value plus electricity correction value.

Concrete example is as follows, if today is Saturday, measurement period is one week, then if Saturday last week is 5 times by means of train number number, then if Saturday week before last is 7 inferior by means of train number number, multiple measurement period average computations get off Saturday this place by means of car quantity be 5 times, basic charge value is the 50% of total electricity, percent coefficient is 2%, can so show that basic power threshold is 50%+2%*5=60%, as the 60% of total electricity, if current time is at 9 points, paddy electricity chargeable time is 10 points, then current time difference is 60 points.Basic quantity coefficient value is set as 300%, then, 300%/60=5%, if the battery electric quantity value of Current vehicle is the 50% of total electricity, then 50%+5%=55%, the basic power threshold less than 60%, is judged to need to charge, and charging pile is charged to electric automobile.

If the battery electric quantity value of Current vehicle is the 56% of total electricity, so basic quantity coefficient value is 56%+5%=61% plus the battery electric quantity value of Current vehicle divided by the numerical value drawn after time difference, basic power threshold more than 60%, is judged to need to charge, and charging pile is charged to electric automobile.

If similar multiple measurement period average computations are got off, basic power threshold is relatively low, more difficult to reach charge threshold in this place by means of car negligible amounts Saturday.

If having the distance of some vehicle parkings within 200 meters, compare the voltage value of Adjacent vehicles, central server is being judged to need to be started to charge up successively from high to low with electricity in the vehicle for charging.

Select to return the car order and after swiping the card at charging pile in on-board information platform in user, central server sends cost information to handheld terminal and on-board information platform, if handheld terminal is connected disconnection with central server, charge information is directly sent in second brush rfid card to handheld terminal.

The method that the present embodiment employs timesharing lease, employs positive time-sharing charging rent method, with reference to local peak-trough electricity electricity price and electricity consumption strategy, while without prejudice to is normally hired a car and returned the car, substantially reduces electric cost.The setting of the present embodiment possesses the function of member card verification, must assure that the user prestored in only vehicle and charging pile GPRS terminals just can hire a car, system in the present embodiment supports that according to the actual requirements user rents many cars or restriction user only rents a car, and the binding of vehicle and charging pile is realized in communication when user returns the car by car with charging pile.The present embodiment realizes reservation priority principle, and vehicle locks subscriber Jing after reservation, and other users cannot again lease this vehicle, and the limited time of reservation is determined.If having leased other vehicles after the time-out of user's reservation simultaneously or reservation, reservation is cancelled automatically.Same reservation strategy can also be supported including charging pile.The present embodiment employs the method for limiting area by means of car, it is determined that by means of car scope, it is therefore prevented that on a large scale with the generation that region car stressful situation is appraised and decided caused by car.Different regions correspondence is reached different by means of car basis power threshold, namely allow more by means of the larger charging pile charging of car frequency, holding electricity as much as possible, most people is enabled to borrow car as much as possible, both the demand of vehicle electricity had been take into account, it is also contemplated that the demand that vehicle is used, the financial cost of satisfaction and the double requirements of use cost.

Specific embodiment described herein is only explanation for example spiritual to the present invention.Those skilled in the art can be made various modifications to described specific embodiment or supplement or substituted using similar mode, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.

Although more having used the terms such as main service, sub-services, timesharing lease herein, it is not precluded from using the possibility of other terms.It is used for the purpose of more easily describing and explaining the essence of the present invention using these terms；It is all contrary with spirit of the invention to be construed as any additional restriction.

Claims (10)

1. a kind of electric automobile timesharing leasing system communication construction, it is characterized in that, including the lease APP of the electric automobile on WEB user sides, WEB keepers end, main service, sub-services and user's handheld terminal, main service includes member authentication service, heartbeat and message push service, APP services, communication strategy service and message queue；APP is serviced and message queue is all connected with data buffer storage cluster；

The lease APP of the electric automobile on user's handheld terminal can carry out other operations to member authentication server initiation logging request and after verification passes through；The lease APP of the electric automobile on user's handheld terminal is to APP service origination requests and obtains data；The lease APP timings of the electric automobile on user's handheld terminal initiate request to heartbeat and message push service, and the lease APP state notifyings of the electric automobile on user's handheld terminal main service is given；When the lease APP of the electric automobile on user's handheld terminal is exited, to member authentication service initiation request is exited；

The logging request that the lease APP of the electric automobile on member authentication service receive user handheld terminal is initiated, and whether verify the username and password of member legal；After verification passes through, member authentication service is saved in member's logging status database this session data for logging in；

The heartbeat packet of the lease APP of the electric automobile in heartbeat and message push service receive user handheld terminal, and the state of the lease APP of the electric automobile on user's handheld terminal is saved in member's logging status database, and the message for needing the lease APP of the electric automobile being pushed on user's handheld terminal is sent into the lease APP of the electric automobile on user's handheld terminal；

The type of service of the request of the lease APP of the electric automobile on APP service based on subscriber handheld terminals is operated：A, for operating database is needed, to data base read-write data；For the instruction that the lease APP of the electric automobile on user's handheld terminal is issued to the lease APP of the electric automobile on on-board information platform, APP services are from the concrete corresponding sub-services of communication strategy service acquisition instruction, then to single instrction under this sub-services, and result to be returned is waited, then result is returned to the lease APP of the electric automobile on user's handheld terminal；

WEB user sides service the request of member by being sent to APP, then wait-for-response data；

WEB keepers end to operation maintenance personnel provides service, and by connecting database the read-write operation of data is carried out；

Communication strategy service is used to obtain the corresponding sub-services of lease APP of the electric automobile on on-board information platform；

Message queue is used for the storage and distribution of message, when sub-services or WEB keepers end need to be deducted fees or sent note, to message queue message is write.

2. electric automobile timesharing leasing system communication construction according to claim 1, it is characterised in that also including charging pile management module and the lease APP of the electric automobile on on-board information platform；

Sub-services receive the Tcp length connection of the lease APP initiations of charging pile management module and the electric automobile on on-board information platform, and the request to the lease APP initiations of charging pile management module and the electric automobile on on-board information platform is responded；Sub-services read instruction message from message queue, instruction is assigned to the lease APP of the electric automobile in charging pile management module and on-board information platform, and receives implementing results of the lease APP of charging pile management module and the electric automobile on on-board information platform to instruction；Sub-services service the implementing result of return instruction to APP；

The lease APP of the electric automobile on on-board information platform to sub-services initiate the long connection requests of Tcp；The long interface channels of Tcp that the service request or background request that member is initiated by the lease APP of the electric automobile on on-board information platform passes through to have set up issue sub-services；The lease APP of the electric automobile on on-board information platform obtains the response data that sub-services are beamed back；The lease APP of the electric automobile on on-board information platform receives the instruction that sub-services are assigned, and is performed by car machine system, and implementing result is returned sub-services；

Charging pile management module receives the instruction that sub-services send, and performs.

3. electric automobile timesharing leasing system communication construction according to claim 1 and 2, it is characterised in that the main service also includes the service of deducting fees and short message service, when the service of deducting fees needs to be transmitted note, to message queue message is write；

The message of deducting fees in message queue is read in the service of deducting fees, and then carries out computing of deducting fees；

The short message in message queue is read in short message service, and by Short Message Service Gateway note is sent.

4. a kind of electric automobile timesharing leasing system, for the lease of electric automobile, it is characterised in that：Including central server, several child servers, user's handheld terminal of the lease APP of electric automobile is installed, the access terminal of connection internet, several are equipped with the automobile charging pile and the timesharing leasing system being disposed on each electric automobile of communication and processing meanss, user's handheld terminal and access terminal are communicated to connect with described central server, the child servers are communicated to connect with described central server, the child servers are communicated to connect respectively with several automobile charging piles, timesharing leasing system on each electric automobile is communicated to connect with described child servers, the timesharing leasing system includes vehicle communication device, for collecting vehicle information and the on-board information platform for processing, information reader unit for authentication and the vehicle control module that car door and power are controlled, described information reader unit, vehicle control module and vehicle communication device are connected with described on-board information platform, the on-board information platform is communicated to connect by vehicle communication device with child servers.

5. electric automobile timesharing leasing system according to claim 4, it is characterised in that：The on-board information platform is with display and interactive function, the intelligent control device for being provided with intelligent operating system and being connected with electric automobile bus；The on-board information platform includes message processing module, charter business module, information exchange module, vehicle query reservation module, charging pile query-reservation module and module of returning the car, and the charter business module, information exchange module, vehicle query reservation module, charging pile query-reservation module and module of returning the car are connected with described message processing module；The vehicle communication device is GPRS module, and described information reader unit is RFID card reader module, and the timesharing leasing system also includes indicator lamp reminding module, and the indicator lamp reminding module is electrically connected with described on-board information platform.

6. electric automobile timesharing leasing system according to claim 4, it is characterised in that：The automobile charging pile is in each infield with the installation of charging pile cluster form, each charging pile cluster is mounted on a cluster controller and a GPRS terminal, the GPRS terminals are electrically connected with the cluster controller of place infield, charging pile described in each includes RFID card reader and ground lock, the RFID card reader and ground lock are electrically connected with described cluster controller, the cluster controller is connected by GPRS terminals with described child servers communication, and each GPRS terminal is the GPRS terminals with storage chip.

7. electric automobile timesharing leasing system according to claim 6, it is characterised in that：Charter business module is installed in the electric automobile timesharing leasing system, charter business module includes charter business logic and business conduct module on central server, member management module on central server, vehicle information management module on central server, charging pile management module on cluster controller, the lease APP of the electric automobile on user's handheld terminal, the lease APP of the electric automobile on on-board information platform, access the WEB user sides in terminal and WEB keepers end, charter business logic and business conduct module respectively with member's management module, vehicle information management module, charging pile management module, the lease APP of the electric automobile on user's handheld terminal, the lease APP of the electric automobile on on-board information platform, access the WEB user sides in terminal and the connection of WEB keepers end.

8. electric automobile timesharing leasing system according to claim 7, it is characterised in that：Membership information management two-way interactive data-interface is provided with the member management module, the lease APP of the electric automobile on the on-board information platform is arranged in message processing module, the lease APP of the electric automobile on on-board information platform includes vehicle location functional module, car status information functional module and business information both-way communication interface, the vehicle location functional module, car status information functional module and business information both-way communication interface are connected with described charter business logic and business conduct module, charging pile management module includes charging pile management system interface, charging pile monitoring module, the predetermined charging pile binding module of car, the powered off and on management module of charging pile, the charging pile monitoring module, the predetermined charging pile binding module of car, the powered off and on management module of charging pile is connected by electric stake management system interface with charter business logic and business conduct module.

9. electric automobile timesharing leasing system according to claim 7, it is characterised in that：The WEB user sides include user account management module, information management module, business handling module and charter business release module, the user account management module, information management module, business handling module and charter business release module are connected with described charter business logic and business conduct module, the WEB keepers end includes vehicle maintenance module, charging pile is safeguarded, charging setup module, vehicle state monitoring and threshold value setting module and information issuing module, the vehicle maintenance module, charging pile is safeguarded, charging setup module, vehicle state monitoring and threshold value setting module and information issuing module are connected with described charter business logic and business conduct module.

10. a kind of electric automobile timesharing rent method, is used in electric automobile timesharing leasing system as claimed in claim 4, it is characterised in that：Including user account management method, rent returning method and charging management method；User account management method includes the registration of user, nullifies and synchronous；

Renting returning method includes：Central server receives control signal and performs corresponding steps, step of returning the car of hiring a car is performed when central server is received hire a car and return the car signal, when central server receive reservation hire a car signal when perform reservation and hire a car step, reservation charge step is performed when central server receives reservation charging signals, when central server receive strange land hire a car signal when perform strange land and hire a car step；

Charging management method includes：Charging pile obtains the current electric motor car information stopped and sends to central server, central server carries out electricity and calculates and assign time-sharing charging control command according to electric motor car current vehicle condition and ambient parameter, and charging pile carries out time-sharing charging to the current electric motor car for stopping.