AU2017100657A4 - A secure communication method of wireless charging of electric vehicle - Google Patents

A secure communication method of wireless charging of electric vehicle Download PDF

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AU2017100657A4
AU2017100657A4 AU2017100657A AU2017100657A AU2017100657A4 AU 2017100657 A4 AU2017100657 A4 AU 2017100657A4 AU 2017100657 A AU2017100657 A AU 2017100657A AU 2017100657 A AU2017100657 A AU 2017100657A AU 2017100657 A4 AU2017100657 A4 AU 2017100657A4
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data
hard wire
wireless charging
electric vehicle
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AU2017100657A
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Yaoguang Cao
Kangfeng Sun
Yunpeng Wang
Shichun Yang
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Beihang University
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Beihang University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/12—Inductive energy transfer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
    • B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2270/00—Problem solutions or means not otherwise provided for
    • B60L2270/30—Preventing theft during charging
    • B60L2270/38—Preventing theft during charging of data
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Automation & Control Theory (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Abstract The invention relates to a secure communication method of wireless charging of an electric vehicle, applied to secure communication of a battery management system of an electric vehicle and a vehicle-mounted wireless charging device. According to the secure communication method, a hard wire is connected between the battery management system of an electric vehicle and the vehicle-mounted wireless charging device, during data 5 information transmission, a data sending node controls to pull down a hard wire signal at first, a data receiving node starts receiving data information after detecting the pulled-down hard wire signal, after the data information transmission, the data sending node controls to pull up the hard wire signal, and the data receiving node confirms the received data information to be valid after detecting the pulled-up hard wire signal. According to the secure communication method provided by the present invention, the identity authentication 10 of communication nodes is ensured by adding dual protection mechanisms of hardware signals and a hardware signal confirmation mechanism, and the security and the reliability of the data information transmission of the wireless charging of the electric vehicle are guaranteed. Start A data sending node prepares to send data The data sending node controls to pull down a hard wire signal The data sending node sends data A data receiving node No detects the pulled down hard wire signal Yes The data receiving node receives the data Data transmission No is completed Yes The data sending node controls to pull up the hard wire signal hedata receiving No noedetects the pulled-up hard wire siga The data receiving node confines the received data to be valid cEnd Fig. 2

Description

A Secure Communication Method of Wireless Charging of Electric Vehicle
Field of the Invention 2017100657 06 Jun2017
The invention relates to the technical field of electric vehicles, and particularly to a secure communication 5 method of wireless charging between a battery management system of an electric vehicle and a vehicle-mounted wireless charging device.
Background of the Invention
With the vigorous promotion and use of electric vehicles, the increase and use of vehicle-mounted electronic 10 devices/systems with diversified and integrated functions are gradually popularized in the mass market. The application of the vehicle-mounted electronic devices/systems brings new hidden dangers of secure use of the vehicle security while greatly improving the security coefficients of traditional vehicles. Charging vehicle-mounted power batteries in a wireless manner is the commonly used energy supplementation manner of the electric vehicles in the future, as shown in Fig. 1, compared with other vehicle-mounted electronic 15 devices/systems, a vehicle-mounted wireless charging device/system can receive the command of an external device (the external device is generally a wireless charging system electric energy sending terminal or other devices) in a wireless communication mode, thereby having certain openness; on the other hand, the vehicle-mounted wireless charging device/system is directly connected with a power battery (that is, the power battery in a battery management system of an electric vehicle), and the two generally adopt a CAN bus 1 for 20 communication and data information transmission. Therefore, if an intruder can invade an unauthenticated network node through the open wireless communication channel by adopting the same communication protocol so as to steal the data information of the CAN bus 1 or input wrong information to the CAN bus 1, thereby affecting the security and the reliability of the entire electric vehicle system and bringing potential safety hazards for the further promotion and application of the electric vehicle. Therefore, in order to avoid the 25 invasion of the vehicle-mounted wireless charging device/system by external malicious control signals, there is an urgent need to adopt a secure communication method between the vehicle-mounted wireless charging device/system and the battery management system of an electric vehicle to ensure the security and the reliability of the electric vehicle system. 30 Summary of the Invention
The invention provides a secure communication method of wireless charging of an electric vehicle in view of the problem that there is no secure communication method or means and data information transmission between an existing vehicle-mounted wireless charging device/system and a battery management system of an electric vehicle, resulting in that an intruder can invade an unauthenticated network node through the open 35 wireless communication channel between an vehicle-mounted electronic device/system and an external device so as to steal the data information of a CAN bus or input wrong information to the CAN bus. A hard wire is connected between the battery management system of an electric vehicle and the vehicle-mounted wireless charging device, and signals of the hard wire are controlled rationally during data information transmission to mark the validity of the data information transmission, thereby avoiding the decoding and leakage of sensitive 40 data information and guaranteeing the security and reliability of the data information transmission of wireless charging of the electric vehicle.
The technical solutions of the invention are as follows: A secure communication method of wireless charging of an electric vehicle, applied to secure communication 45 of a battery management system of an electric vehicle and a vehicle-mounted wireless charging device, which are a data sending node and a data receiving node to each other during the communication, wherein a hard wire is connected between the battery management system of an electric vehicle and the vehicle-mounted wireless l charging device, during data information transmission, the data sending node controls to pull down a hard wire signal at first, the data receiving node starts receiving data information after detecting the pulled-down hard wire signal, after the data information transmission, the data sending node controls to pull up the hard wire signal, and the data receiving node confirms the received data information to be valid after detecting the 5 pulled-up hard wire signal. 2017100657 06 Jun2017
After the data information transmission, the data sending node controls to pull up the hard wire signal and sends a pulse signal, and the data receiving node confirms the received data information to be valid after detecting tire pulled-up hard wire signal and receiving the pulse signal. 10
The number of the pulse signals is determined by the parity after the summation of the transmitted data information.
When the transmitted data information is an odd number after the summation, one pulse signal is sent; and 15 when the transmitted data information is an even number after the summation, two pulse signals are sent.
The battery management system of an electric vehicle and the vehicle-mounted wireless charging device perform communication through a CAN bus and receive and transmit the data information. 20 A secure communication system of wireless charging of an electric vehicle, applied to secure communication of a battery management system of an electric vehicle and a vehicle-mounted wireless charging device, includes the battery management system of an electric vehicle and the vehicle-mounted wireless charging device, which are a data sending node and a data receiving node to each other during the communication, wherein the system further includes a hard wire connected between the battery management system of an 25 electric vehicle and the vehicle-mounted wireless charging device, during data information transmission, the data sending node controls to puli down a hard wire signal at first, the data receiving node starts receiving data information after detecting the pulled-down hard wire signal, after the data information transmission, the data sending node controls to pull up the hard wire signal, and the data receiving node confirms the received data information to be valid after detecting the pulled-up hard wire signal. 30
After the data information transmission, the data sending node controls to pull up the hard wire signal and sends a pulse signal, and the data receiving node confirms the received data information to be valid after detecting the pulled-up hard wire signal and receiving the pulse signal. 35 The number of the pulse signals is determined by the parity' after the summation of the transmitted data information.
When the data information is an odd number after the summation, the number of the pulse signals is set as 1; and when the data information is an even number after the summation, the number of the pulse signals is set as 40 2.
The battery management system of an electric vehicle and the vehicle-mounted wireless charging device perform communication through a CAN bus and receive and transmit the data information. 45 The technical effects of the invention are as follows:
The secure communication method of the wireless charging of the electric vehicle involved in the present invention is applied to the secure communication of the battery management system of an electric vehicle and 2 the vehicle-mounted wireless charging device, which are the data sending node and the data receiving node to each other during the communication, according to the secure communication method, the hard wire is connected between the battery management system of an electric vehicle and the vehicle-mounted wireless charging device, during the data information transmission, the data sending node controls to pull down the 5 hard wire signal at first, the data receiving node starts receiving the data information after detecting the pulled-down hard wire signal, after the data information transmission, the data sending node controls to pull up the hard wire signal, and the data receiving node confirms the received data information to be valid after detecting the pulled-up hard wire signal. According to the secure communication method provided by the present invention, the identity authentication of communication nodes is ensured by adding dual protection 10 mechanisms of hardware signals and a hardware signal confirmation mechanism, thereby effectively avoiding the intruder from invading the unauthenticated network node through the open wireless communication channel between the vehicle-mounted wireless charging device and the external device by employing the same communication protocol so as to steal the data information of a data transmission bus or input wrong information to the data transmission bus, guar anteeing the security and the reliability' of the data information 15 transmission of the wireless charging of the electric vehicle and eliminating the potential safety hazards in the further promotion and application of the electric vehicle. 2017100657 06 Jun2017
Further, according to the secure communication method provided by the present invention, during the data information transmission, the pulse signal is additionally arranged while rationally setting and controlling the 20 hard wire signal so as to mark the validity of the data information transmission, the data receiving node only confirms the received data information to be valid after receiving the pulled-up hard wire signal and the pulse signal, thereby enhancing and ensuring the security and the reliability of the data information transmission of the wireless charging of the electric vehicle. 25 The invention further relates to a secure communication system of wireless charging of an electric vehicle, including a battery management system of an electric vehicle, a vehicle-mounted wireless charging device and a hard wire connected therebetween, duiing data information transmission, a data sending node controls to pull down a hard wire signal at first, a data receiving node starts receiving data information after detecting the pulled-down hard wire signal, after the data information transmission, the data sending node controls to pull up 30 the hard wire signal, and the data receiving node confirms the received data information to be valid after detecting the pulled-up hard wire signal. The secure communication system involved in the present invention corresponds to the above-mentioned secure communication method of the wireless charging of the electric vehicle and can be understood as the secure communication system for realizing the above-mentioned secure communication method of tire wireless charging of the electric vehicle provided by the present invention. The 35 secure communication system is simple in structure and high in practicability, and is able to realize effective and secure receiving and transmitting of sensitive data information, avoid the decoding and leakage of the sensitive data information, guarantee the security and die accuracy of data transmission and provide better stability and security for the new-generation electric vehicle wireless charging communication systems. 40 Brief Description of the Drawings
Fig. 1 is a structural schematic diagram of a traditional electric vehicle wireless charging communication system.
Fig. 2 is a working flow chart of a secure communication method of wireless charging of an electric vehicle of the invention. 45 Fig. 3 is a preferred working flow chart of a secure communication method of wireless charging of an electric vehicle of the invention.
Fig. 4 is a structural schematic diagram of a secure communication system of wireless charging of an electric 3 vehicle of the invention. 2017100657 06 Jun2017
Fig. 5 is a preferred structural schematic diagram of a secure communication system of wireless charging of an electric vehicle of the invention. 5 Reference signs are shown in the drawings as follows: 1- CAN bus; 2-hard wire.
Detailed Description of the Invention
The invention will be illustrated below in combination with the accompanying drawings. 10
The invention discloses a secure communication method of wireless charging of an electric vehicle, applied to secure communication of a battery management system of an electric vehicle and a vehicle-mounted wireless charging device, the battery management system of an electric vehicle and the vehicle-mounted wireless charging device are a data sending node and a data receiving node to each other in a communication process, 15 the vehicle-mounted wireless charging device can generally communicate with an external device in a wireless mode, the external device is generally a wireless charging system electric energy sending terminal or other devices, a hard wire is connected between the battery management system of an electric vehicle and the vehicle-mounted wireless charging device, the specific working process is as shown in Fig. 2, when the communication is started, the data sending node prepares to send data information; during data information 20 transmission, the data sending node controls to pull down a hard wire signal at first, and then the data sending node sends the data information; the data receiving node starts receiving the data information after detecting the pulled-down hard wire signal, and directly terminates the communication when the data receiving node does not detect the pulled-down hard wire signal; after die data information transmission, the data sending node controls to pull up the hard wire signal, namely restores the hard wire signal, the data receiving node 25 confirms the received data information to be valid after detecting the pulled-up hard wire signal, namely, confirms that the data information received between front and rear variations of the hard wire signal to be valid, the communication is terminated, and when the data receiving node does not receive the pulled-up hard wire signal, it directly terminates the communication. According to the secure communication method provided by the present invention, the hard wire is connected between the battery management system of an electric vehicle 30 and the vehicle-mounted wireless charging device, the hard wire can be a hard wire that has been added between the battery management system of an electric vehicle and the vehicle-mounted wireless charging device and can also be an existing one between the battery management system of an electric vehicle and the vehicle-mounted wireless charging device, when a plurality of hard wires are existing, the data sending node pulls down one of the hard wires and rationally controls the hard wire signal during the data information 35 transmission to mark the validity of the data information transmission, namely, the identity' authentication of communication nodes is ensured by adding dual protection mechanisms of hardware signals and a hardware signal confirmation mechanism, therefore the data information sent by the unauthenticated network communication node becomes invalid information, thereby effectively avoiding the intruder from forging the network communication node by using the external device in a wireless communication mode to steal the data 40 of the data uansmission bus or input wrong information to the data transmission bus, avoiding the decoding and leakage of sensitive data information, and guaranteeing the security and the reliability of the data information transmission of the wireless charging of the electric vehicle. Moreover, even if with the development of the Internet of Vehicles technology and the information technology, vehicles/electric vehicles can receive more and more external information, the secure communication method provided by the present 45 invention can still be expanded to the application in the communication between other vehicle-mounted electronic devices/systems so as to guarantee the driving security of the vehicles. 4 A preferred working flow chart of the secure communication method of the wireless charging of the electric vehicle disclosed by the present invention is as shown in Fig. 3, when the communication is started, the data sending node prepares to send the data information, and preferably, the battery management system of an electric vehicle and the vehicle-mounted wireless charging device perform communication and receive and 5 transmit the data information through CAN bus communication (CAN protocol communication); during data information transmission, the data sending node controls to pull down the hard wire signal at first, and then the data sending node sends the data information; the data receiving node starts receiving the data information after detecting the pulled-down hard wire signal, and directly terminates the communication when the data receiving node does not detect the pulled-down hard wire signal; after the data information transmission, the 10 data sending node controls to pull up the hard wire signal (or restores/recovers the hard wire signal) and sends a pulse signal, the data receiving node confirms the received data information to be valid after detecting the pulled-up hard wire signal and receiving the pulse signal, and otherwise deems the data information to be invalid and terminates the communication, that is, when the data receiving node does not detect the pulled-up hard wire signal or receive the pulse signal, it directly terminates the communication. 2017100657 06 Jun2017 15
In the secure communication method of the wireless charging of the electric vehicle involved in the invention, preferably, the number of the pulse signals can be determined by the parity after the summation of the transmitted data information. For example, when the transmitted data information is an odd number after the summation, the number of the pulse signals can be set as 1, namely, one pulse signal is sent at the moment; and 20 when the transmitted data information is an even number after the summation, the number of the pulse signals can be set as 2, namely, two pulse signals are sent at the moment; and the number of the pulse signals can be randomly set according to actual application demands and is not limited to the embodiment of the invention.
The invention further discloses a secure communication system of wireless charging of an electric vehicle, 25 applied to secure communication of a battery management system of an electric vehicle and a vehicle-mounted wireless charging device, the battery management system of an electric vehicle and the vehicle-mounted wireless charging device are a data sending node and a data receiving node to each other in a communication process, the vehicle-mounted wireless charging device can generally communicate with an external device in a wireless mode, the external device is generally a wireless charging system electric energy sending terminal or 30 other devices, the specific structural schematic diagram is as shown in Fig. 4, the system includes the battery management system of an electric vehicle and the vehicle-mounted wireless charging device, beside the original communication bus between the battery management system of an electric vehicle and the vehicle-mounted wireless charging device, the system further includes a hard wire 2 connected between the battery management system of an electric vehicle and the vehicle-mounted wireless charging device, the hard 35 wire 2 can be an original hard wire or a newly added hard wire, during data information transmission, the data sending node controls to pull down a hard wire signal at first, the data receiving node starts receiving data information through the original communication bus after detecting the pulled-down hard wire signal, after the data information transmission, the data sending node controls to pull up the hard wire signal, namely restores the hard wire signal, and the data receiving node confirms the received data information to be valid after 40 detecting the pulled-up hard wire signal, namely, confirms that the data information received between front and rear variations of the hard wire signal to be valid. With respect to the hard wire 2 connected between the battery management system of an electric vehicle and the vehicle-mounted wireless charging device, the secure communication system provided by the present invention rationally controls the hard wire signal during the data information transmission to mark the validity of the data information transmission, namely, the 45 identity authentication of communication nodes is ensured by adding dual protection mechanisms of hardware signals and a hardware signal confirmation mechanism, therefore the data information sent by the unauthenticated network communication node becomes invalid information, thereby effectively avoiding the 5 intruder from forging the network communication node by using the external device in a wireless communication mode to steal the data of the data transmission bus or input wrong information to the data transmission bus, avoiding the decoding and leakage of sensitive data information, and guaranteeing the security and the reliability of the data information transmission of the wireless charging of the electric vehicle. 2017100657 06 Jun2017 5 A preferred structural schematic diagram of the secure communication system of the wireless charging of the electric vehicle provided by the invention is as shown in Fig. 5, the system includes the battery management system of an electric vehicle and the vehicle-mounted wireless charging device, the battery management system of an electric vehicle and the vehicle-mounted wireless charging device are connected by a CAN bus 1 10 to realize CAN protocol communication, the system further includes the hard wire 2 connected between the battery management system of an electric vehicle and the vehicle-mounted wireless charging device, during the data information transmission, the data sending node controls to pull down the hard wire signal at first, the data receiving node starts receiving the data information through the CAN bus 1 after detecting the pulled-down hard wire signal, after the data information transmission, the data sending node controls to pull up 15 the hard wire signal and sends a pulse signal, and the data receiving node confirms the received data information to be valid after detecting the pulled-up hard wire signal and receiving the pulse signal.
In the secure communication system of the wireless charging of the electric vehicle provided by the invention, preferably, the number of the pulse signals can be determined by the parity after the summation of the 20 transmitted data information. For example, when the transmitted data information is an odd number after the summation, the number of the pulse signals can be set as 1; mid when the transmitted data information is an even number after the summation, the number of the pulse signals can be set as 2; and the number of the pulse signals can be randomly set according to actual application demands and is not limited to the embodiment of the present invention. 25
It should be noted that the specific embodiments described above may enable those skilled in the art to understand the present invention more fully, but do not limit the present invention in any way. Accordingly, although the present invention has been described in detail with reference to the drawings and the embodiments in the present specification, it should be understood by those skilled in the art that modifications 30 or equivalent substitutions can still be made to the present invention. In summary, all the technical solutions and improvements thereof made without departing from the spirit and scope of the present invention shall fall into the protection scope of the patent of the present invention. 6

Claims (5)

  1. Claims
    1. A secure communication method of wireless charging of an electric vehicle, applied to secure communication of a battery management system of an electric vehicle and a vehicle-mounted wireless charging device, which are a data sending node and a data receiving node to each other during the communication, characterized in that a hard wire is connected between the battery management system of an electric vehicle and the vehicle-mounted wireless charging device, during data information transmission, the data sending node controls to pull down a hard wire signal at first, the data receiving node starts receiving data information after detecting the pulled-down hard wire signal, after the data information transmission, the data sending node controls to pull up the hard wire signal, and the data receiving node confirms the received data information to be valid after detecting the pulled-up hard wire signal.
  2. 2. The secure communication method of the wireless charging of the electric vehicle according to claim 1, characterized in that after the data information transmission, the data sending node controls to pull up the hard wire signal and sends a pulse signal, and the data receiving node confirms the received data information to be valid after detecting the pulled-up hard wire signal and receiving the pulse signal.
  3. 3. The secure communication method of the wireless charging of the electric vehicle according to claim 2, characterized in that the number of the pulse signals is determined by the parity after the summation of the transmitted data information.
  4. 4. The secure communication method of the wireless charging of the electric vehicle according to claim 3, characterized in that when the uansmitted data information is an odd number after the summation, one pulse signal is sent; and when the transmitted data information is an even number after the summation, two pulse signals are sent.
  5. 5. The secure communication method of the wireless charging of the electric vehicle according to any of claims 1 to 4, characterized in that the battery management system of an electric vehicle and the vehicle-mounted wireless charging device perform communication through a CAN bus and receive and transmit the data information.
AU2017100657A 2016-08-23 2017-06-06 A secure communication method of wireless charging of electric vehicle Ceased AU2017100657A4 (en)

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Application Number Priority Date Filing Date Title
CN201610712153.8A CN106274525B (en) 2016-08-23 2016-08-23 A kind of electric car wireless charging safety communicating method and system
CN201610712153.8 2016-08-23

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