CN106375287A - Charging method for new energy automobile - Google Patents
Charging method for new energy automobile Download PDFInfo
- Publication number
- CN106375287A CN106375287A CN201610749570.XA CN201610749570A CN106375287A CN 106375287 A CN106375287 A CN 106375287A CN 201610749570 A CN201610749570 A CN 201610749570A CN 106375287 A CN106375287 A CN 106375287A
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- Prior art keywords
- encryption chip
- energy automobile
- new
- cloud server
- charging
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
- H04L63/0876—Network architectures or network communication protocols for network security for authentication of entities based on the identity of the terminal or configuration, e.g. MAC address, hardware or software configuration or device fingerprint
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
- H04L67/125—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks involving control of end-device applications over a network
Abstract
The invention relates to a charging method for a new energy automobile. The charging method is as follows: an encryption chip is installed on the new energy automobile; a unique equipment address and identification information of the encryption chip are pre-stored in a cloud server and the encryption chip; furthermore, the encryption chip is bound with user registration information of the new energy automobile; when the new energy automobile is connected to a charging device, the encryption chip is automatically communicated with the cloud server through the charging device, and performs identity authentication by utilizing the unique equipment address and the identification information of the encryption chip; after passing identity authentication, the encryption chip constantly obtains the battery remaining capacity of the new energy automobile through a battery management system of the new energy automobile, and uploads the battery remaining capacity to the cloud server; and the cloud server automatically starts to charge or stops charging according to the battery remaining capacity. By means of the charging method disclosed by the invention, communication between the new energy automobile to be charged, the charging device and the cloud server is realized through the encryption chip; therefore, automation of the charging process is realized; and the charging method is simple and rapid, and has relatively high security.
Description
Technical field
The invention belongs to new-energy automobile field is and in particular to a kind of charging method that adopted of new-energy automobile.
Background technology
The charging of current new-energy automobile is generally carried out, i.e. new-energy automobile by mobile client or charging radio-frequency card
User need to carry mobile client or the radio-frequency card charging could be opened after completing sequence of operations of charging, otherwise charge no
Method is carried out.Both modes all can not carry out the direct-connected charging of new-energy automobile and charging device, and therefore charging process is more numerous
Trivial.
Occur in that a solution for the problems referred to above, by charging device by simple Internet of Things communication equipment
Carry out the automatic reading of vehicle key message (including vehicle essential information and battery system information etc.), to control charging process.
But this mode often has larger potential safety hazard, easily cause the leakage of vehicle key message, be easily subject to lawless person
Attack.
Content of the invention
It is an object of the invention to provide one kind can be charged automatically without troublesome operation, and safety is higher
New-energy automobile charging method.
For reaching above-mentioned purpose, the technical solution used in the present invention is:
A kind of charging method of new-energy automobile, connects charging device for realizing new-energy automobile under the control of Cloud Server
The charging process being carried out, the method is:
Encryption chip is installed on described new-energy automobile, the Unique Device address of described encryption chip and identification information prestore
Enter in described Cloud Server and described encryption chip, and the user's registration information with described new-energy automobile for the described encryption chip
Binding；
When described new-energy automobile connect described charging device when, described encryption chip by described charging device with described cloud
Server automatically communicates and carries out authentication using its Unique Device address and identification information；
After described authentication, described encryption chip is constantly obtained described by the battery management system of described new-energy automobile
The battery dump energy of new-energy automobile is simultaneously uploaded to described Cloud Server, and described Cloud Server is according to described battery dump energy
Automatically control and start or stop charging.
Preferably, the identification information of described encryption chip includes and its corresponding random string in Unique Device address, close
Key and clock.
Preferably, before the described encryption chip of described installation, chip initiation and user's registration need to be encrypted, by described
Encryption chip initialization makes the Unique Device address of described encryption chip and identification information is prestored into described Cloud Server and described
The user's registration information binding of described encryption chip and described new-energy automobile in encryption chip, is made by described user's registration.
Preferably, the initialized method of described encryption chip is: the Unique Device address of described encryption chip is sent to
Described Cloud Server, described Cloud Server is directed to this described encryption chip described random string of corresponding generation and described key,
Described random string and described key are all preserved to described Cloud Server and described encryption chip by synchronous, and synchronous described
The clock of Cloud Server and the clock of described encryption chip.
Preferably, the method for described user's registration is: the user of described new-energy automobile is registered and obtained registration letter
Breath, after described Cloud Server verifies that described log-on message is effective, is that described user provides a described encryption chip, described cloud clothes
The log-on message of the Unique Device address of the described encryption chip provided and described user is bound and is preserved by business device.
Preferably, when described new-energy automobile connects described charging device, described charging device reads described encryption core
The Unique Device address of piece is simultaneously uploaded to described Cloud Server, and described encryption chip generates the first checking according to its identification information
Code, described Cloud Server is found out its corresponding identification information according to the Unique Device address of described encryption chip and is generated the second checking
Described second identifying code is simultaneously sent to described encryption chip through described charging device by code, and described encryption chip passes through described first
Identifying code and described second identifying code and carry out authentication.
Preferably, the generation method of described first identifying code is: described encryption chip obtains the clock of itself, is deposited with it
The corresponding described random string of storage is spliced to form uniform character string, reuses described key and encrypts described uniform character string
And obtaining byte arrays, the last n byte taking described byte arrays is as described first identifying code；
The generation method of described second identifying code is: described Cloud Server is according to the Unique Device address acquisition of described encryption chip
Its corresponding clock, random string and key of being stored, described Cloud Server is by the corresponding clock of described encryption chip
It is spliced to form uniform character string with corresponding described random string, reuse corresponding described key and encrypt described unified word
Symbol is gone here and there and is obtained byte arrays, and the last n byte taking described byte arrays is as described second identifying code.
Preferably, after described authentication, described encryption chip is first by the vehicle identification code of described new-energy automobile
It is sent to described Cloud Server through described charging device, then the battery dump energy of described new-energy automobile is constantly filled through described
Electric installation is sent to described Cloud Server.
Preferably, start when described battery dump energy is less than default lowest threshold and charge, when described remaining battery
Electricity is higher than to stop during default highest threshold value charging.
Preferably, described key is the aes key being obtained by aes algorithm.
Because technique scheme is used, the present invention compared with prior art has the advantage that the charging side of the present invention
Method realizes the communication of new-energy automobile to be charged and charging device, Cloud Server by encryption chip, thus realizing charging
Process automation, need not additionally any operation, process is simple, quick, and in charging process, vehicle-related information is difficult to leak,
There is higher safety, ensured the key message safety of new-energy automobile and the personal information security of car owner user.
Brief description
Accompanying drawing 1 is the flow chart of the charging method of the new-energy automobile using encryption chip.
Accompanying drawing 2 is the schematic diagram of the charging method of the new-energy automobile using encryption chip.
Accompanying drawing 3 is encryption chip authentication mechanism figure.
Accompanying drawing 4 is the charger drawing using encryption chip.
Specific embodiment
The invention will be further described for shown embodiment below in conjunction with the accompanying drawings.
Each automobile is respectively provided with unique vehicle identification code (vin, vehicle identification number),
Vin code is made up of 17 characters, so being commonly called as 17 bit codes, also referred to as vehicle key message.The generation of this vin code has specific
Rule, corresponding to each car, can guarantee that in 50 years and do not repeat in worldwide.Therefore someone is claimed again
For " identity of automobile card ", it contains manufacturer, age, vehicle, body model and code, electromotor code and the group of vehicle
The information such as dress place.Every implication of vin code is as follows:
The 1-3 position (wmi) of vin code: show maker, brand and type；
The 4-8 position (vds) of vin code: vehicle characteristics, situations such as kinds of automobile, body style, is described；
9th (check bit) of vin code: check bit prevents input error by certain algorithm；
The 10th of vin code: model year, in the type year that is, producer specifies, it is not necessarily the time of actual production, but general and real
The difference in the time that border produces is less than 1 year；
The 11st of vin code: assembling factory；
The 12-17 position of vin code: dispatch from the factory serial number.
By vehicle vin, car owner can accurately distinguish that vehicle, enquiring vehicle batch, enquiring vehicle are broken rules and regulations to record, accurately purchased
Buy vehicle body fittingses etc..Current vehicle vin information read mode typically all directly reads, and does not possess security authentication mechanism, non-
Often it is easily caused the leakage of information of vehicles.Because vehicle vin is often bound with the personal information of car owner, so, once vehicle vin
Information leakage, not only the property safety of vehicle can receive threat, be more likely to result in the personal leakage of car owner, threaten car owner's
Personal secrets.
The battery management system (bms, battery management system) of new-energy automobile is mainly used in accurately
The battery dump energy (soc, state of charge) of estimation automobile is it is ensured that battery dump energy maintains rational scope
Interior, prevent from battery being caused damage due to overcharge or overdischarge, and show the residual energy of new-energy automobile energy-storage battery at any time
Amount, i.e. the state-of-charge of energy-storage battery.In battery charge and discharge process, battery management system Real-time Collection new-energy automobile electric power storage
The terminal voltage of every piece of battery of Chi Zuzhong and temperature, charging and discharging currents and battery bag total voltage, prevent battery occur overcharge or
Overdischarge phenomenon.Additionally, the battery management system of new-energy automobile should make each battery in set of cells all reach equilibrium unanimously
State, enable cell equalizaing charge.Battery management system generally electric automobile special electronic control unit (ecu,
Electronic control unit) control under and work.
At present, all resources of the battery management system of new-energy automobile are all disclosed, if lawless person obtains electricity
The parameter setting order of pond management system, it is possible to rewrite battery management system parameter by some technological means malice, leads to
The battery of new-energy automobile produces to overcharge or cross puts phenomenon, more seriously it is also possible to charging accident, to new-energy automobile
Bring great potential safety hazard with car owner.
A kind of charging method of new-energy automobile, connects charging for realizing new-energy automobile under the control of Cloud Server
The charging process that device is carried out, realize as described below by process for the method, and its flow process is as shown in Figures 1 and 2.
First, the starting stage
1st, encryption chip initialization
Encryption chip: there is unique device address, and all comprise a clock chip, and comprise to aes encrypting and decrypting
Hardware supported.
The Unique Device address of encryption chip is sent to Cloud Server, for the identification of follow-up encryption chip；
Cloud Server is directed to each encryption chip corresponding generation random string (r-str, random string) and key；
Random string is synchronously corresponded to the Unique Device address of encryption chip and is preserved to Cloud Server and encryption chip, close
Key is also synchronously corresponded to the Unique Device address of encryption chip and is preserved to Cloud Server and encryption chip；
The clock of synchronous Cloud Server and the clock of encryption chip, and by the clock after synchronization and correspond to uniquely setting of encryption chip
Standby address is stored.
Encryption chip constitute encryption chip with its corresponding random string in Unique Device address, key and clock
Identification information, is initialized by above-mentioned encryption chip, makes the Unique Device address of encryption chip and identification information be prestored into cloud clothes
In business device and encryption chip.
The design of random string: random string is a segment length is 16 bytes, the character string of content completely random.
Its generating mode is: after being the character string of 44 bytes using openssl rand base64 32 generation one segment length, before taking it
16 bytes.The random string that different chips are generated all differs, for increasing safety and the randomness of ciphering process.
The generation of key: key is the aes key being obtained by aes algorithm.Aes algorithm select: aes is advanced
Encryption standard, Advanced Encryption Standard, it is a kind of block encryption standard that Federal Government adopts, be symmetrical
One of most popular algorithm in key encryption.Aes is an iteration, the password of symmetric key packet, it can using 128,
192 and 256 keys, and with 128 (16 byte) block encryptions and ciphertext data.Use with public key cryptography
Key uses identical key encrypting and decrypting data to difference, symmetric key cipher.The encryption number being returned by block cipher
According to digit identical with input data.Iterative cryptographic uses a loop structure, repeats in the cycle to replace
(permutations) and replace (substitutions) input data.Aes encryption data be in some sense jail not
Can break, because not having known crypt analytical attack can decipher aes ciphertext, except non-obtrusive traversal search is all possible
256 bit keys.
Clock is synchronous: in initialization procedure, initialization apparatus obtain Cloud Server clock (length is 10 integers), so
Afterwards this data is reached encryption chip, encryption chip changes into corresponding block pattern according to this data, and chip rtc clock is set
For server clock, complete synchronization.Encryption chip clock is consistent with server clock, and server just can be made to generate with encryption chip
Identifying code be consistent, otherwise checking cannot pass through.The synchronous design of clock enhances the timeliness of communication mechanism in the present invention
Property and safety.
2nd, user's registration
The user of new-energy automobile is registered by network, the main binding including user mobile phone number, setting of account etc., from
And obtaining log-on message, this log-on message preserves to Cloud Server；
After Cloud Server checking log-on message is effective, staff is one encryption chip of user's Free distribution, and Cloud Server will
The Unique Device address of the encryption chip provided is bound and is preserved with the log-on message of user.
By above-mentioned user registration course, make the user's registration information binding of encryption chip and new-energy automobile.
3rd, encryption chip is installed
The encryption chip of acquisition is arranged on the relevant position of new-energy automobile the user of new-energy automobile, makes it and new forms of energy
The electric automobile special electronic control unit of automobile is connected, and realizes communication therebetween.
Each step of above-mentioned starting stage is only carried out before first use.
2nd, charging open stage
1st, the certification of encryption chip
The new-energy automobile being mounted with encryption chip is connected upper charging device.When charging device has detected new-energy automobile even
When connecing, whether its new-energy automobile that it is connected firstly the need of automatic detection is mounted with the encryption chip mating, in this way, then
It is charged according to the following steps, otherwise cannot be charged by subsequent step, now can enter according to traditional charge mode
The charging operations of row new-energy automobile.When the new-energy automobile installing encryption chip connects charging device, encryption chip leads to
Overcharge electric installation and automatically communicate with Cloud Server and carry out authentication using its Unique Device address and identification information, specifically
As shown in Figure 3:
Communication module in charging device reads the Unique Device address of encryption chip and is uploaded to Cloud Server；
In encryption chip, the identification information that it is stored according to itself generates the first identifying code.Generate the side of the first identifying code
Method is: encryption chip obtains the clock clock of itself, is spliced to form with the corresponding random string r-str that it is stored
Uniform character string r-str, clock, reuse aes key encryption uniform character string and obtain byte arrays aes (r-str,
Clock), as the first identifying code, n more than or equal to 3 is just to the last n byte taking byte arrays aes (r-str, clock)
Integer, in the present embodiment, n value is 8；
Meanwhile, in Cloud Server, it is right that it finds out it according to the Unique Device address of the encryption chip obtaining by charging device
The identification information answered generates the second identifying code.The generation method of the second identifying code is: Cloud Server is unique according to encryption chip
Device address obtains corresponding clock clock, random string r-str and the aes key that it is stored, and Cloud Server will be encrypted
The corresponding clock clock of chip is spliced to form uniform character string r-str, clock with corresponding random string r-str,
Reuse corresponding aes key encryption uniform character string and obtain byte arrays aes (r-str, clock), take byte arrays aes
As the second identifying code, the value of same n is 8 to the last n byte of (r-str, clock).After generating the second identifying code, cloud takes
This second identifying code is sent to encryption chip by charging device by business device；
Encryption chip carries out authentication by the first identifying code and the second identifying code, encryption chip itself is produced first
The second identifying code that identifying code and Cloud Server are sent is compared, if identical, authentication is passed through, and otherwise authentication is not
Pass through.
2nd, the startup of charging process
As shown in Figure 4, after authentication, the electric automobile special electronic control unit of new-energy automobile starts vehicle and knows
Other code and battery dump energy transmission channel, charged for the vehicle identification code of new-energy automobile device is first sent by encryption chip
To Cloud Server, then by the battery dump energy constantly new-energy automobile being obtained by the battery management system of new-energy automobile constantly
Charged device is uploaded to Cloud Server.If Cloud Server receives vehicle identification code first, its by this vehicle identification code with
The information of user's registration is bound before.User's registration information, encryption chip Unique Device address and vehicle identification code shape
Become one-to-one relation, unique user information all can be corresponded to by any information.
Then, Cloud Server automatically controls according to battery dump energy and starts or stops charging.Cloud Server is connect in real time
The Vehicular battery dump energy information receiving is judged, if battery dump energy is less than default lowest threshold, cloud takes
Business device sends messages to charging device and starts charging, if battery dump energy is higher than default highest threshold value, cloud service
Device sends messages to charging device and stops charging.Meanwhile, Cloud Server is according to vehicle real-time battery dump energy information monitoring
The battery status of automobile, once there are battery failures, sends alarm to charging device, warning information is passed through by charging device in time
Encryption chip is transferred to Vehicle Electronic Control Unit, sends corresponding troubleshooting instruction by Vehicle Electronic Control Unit, thus
Ensure the charging safety of new-energy automobile.
After charging complete, Cloud Server produces consumption according to user's registration information and reckons up the bill, and directly uses from registration
In the account balance at family, deduction charging expense or prompting user are charged disbursement and sattlement.
Above-described embodiment only technology design to illustrate the invention and feature, its object is to allow person skilled in the art
Scholar will appreciate that present disclosure and implements according to this, can not be limited the scope of the invention with this.All according to the present invention
Equivalence changes or modification that spirit is made, all should be included within the scope of the present invention.
Claims (10)
1. a kind of charging method of new-energy automobile, connects charging dress for realizing new-energy automobile under the control of Cloud Server
Put carried out charging process it is characterised in that: the method is:
Encryption chip is installed on described new-energy automobile, the Unique Device address of described encryption chip and identification information prestore
Enter in described Cloud Server and described encryption chip, and the user's registration information with described new-energy automobile for the described encryption chip
Binding；
When described new-energy automobile connect described charging device when, described encryption chip by described charging device with described cloud
Server automatically communicates and carries out authentication using its Unique Device address and identification information；
After described authentication, described encryption chip is constantly obtained described by the battery management system of described new-energy automobile
The battery dump energy of new-energy automobile is simultaneously uploaded to described Cloud Server, and described Cloud Server is according to described battery dump energy
Automatically control and start or stop charging.
2. new-energy automobile according to claim 1 charging method it is characterised in that: the identification of described encryption chip letter
Breath includes and its corresponding random string in Unique Device address, key and clock.
3. new-energy automobile according to claim 2 charging method it is characterised in that: described installation described encryption chip
Before, chip initiation and user's registration need to be encrypted, the unique of described encryption chip is made by the initialization of described encryption chip
Device address and identification information are prestored in described Cloud Server and described encryption chip, make described adding by described user's registration
The user's registration information binding of close chip and described new-energy automobile.
4. new-energy automobile according to claim 3 charging method it is characterised in that: described encryption chip is initialized
Method is: the Unique Device address of described encryption chip is sent to described Cloud Server, it is described that described Cloud Server is directed to this
Encryption chip is corresponding to generate described random string and described key, and described random string and described key are all synchronously preserved
To described Cloud Server and described encryption chip, and the clock of the clock of synchronous described Cloud Server and described encryption chip.
5. new-energy automobile according to claim 3 charging method it is characterised in that: the method for described user's registration
For: the user of described new-energy automobile is registered and is obtained log-on message, and described Cloud Server verifies that described log-on message has
After effect, it is that described user provides a described encryption chip, described Cloud Server is unique by the described encryption chip provided
The log-on message of device address and described user is bound and is preserved.
6. new-energy automobile according to claim 2 charging method it is characterised in that: when described new-energy automobile connect
During described charging device, described charging device reads the Unique Device address of described encryption chip and is uploaded to described cloud service
Device, described encryption chip generates the first identifying code according to its identification information, and described Cloud Server is according to described encryption chip only
One device address is found out its corresponding identification information and is generated the second identifying code and by described second identifying code through described charging device
It is sent to described encryption chip, described encryption chip is carried out identity and recognized by described first identifying code and described second identifying code
Card.
7. new-energy automobile according to claim 6 charging method it is characterised in that: the generation of described first identifying code
Method is: described encryption chip obtains the clock of itself, is spliced to form with the corresponding described random string that it is stored
Uniform character string, reuses described key and encrypts described uniform character string and obtain byte arrays, take described byte arrays
N byte is as described first identifying code afterwards；
The generation method of described second identifying code is: described Cloud Server is according to the Unique Device address acquisition of described encryption chip
Its corresponding clock, random string and key of being stored, described Cloud Server is by the corresponding clock of described encryption chip
It is spliced to form uniform character string with corresponding described random string, reuse corresponding described key and encrypt described unified word
Symbol is gone here and there and is obtained byte arrays, and the last n byte taking described byte arrays is as described second identifying code.
8. new-energy automobile according to claim 2 charging method it is characterised in that: after described authentication,
The vehicle identification code of described new-energy automobile is first sent to described Cloud Server through described charging device by described encryption chip, then
The battery dump energy of described new-energy automobile is constantly sent to described Cloud Server through described charging device.
9. new-energy automobile according to claim 2 charging method it is characterised in that: when described battery dump energy is low
Start when default lowest threshold and charge, stop when described battery dump energy is higher than default highest threshold value charging.
10. new-energy automobile according to claim 2 charging method it is characterised in that: described key is to be calculated by aes
The aes key that method obtains.
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