Wireless data transmission to motor vehicle
By establishing a data cable between the vehicle and the charging system, negotiating and automatically configuring the wireless access point connection, the automation and security issues of the access point connection process in the vehicle charging system are solved, achieving simple and secure data transmission.
Patent Information
- Application Number
- CN202480057982.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-09-21
- Filing Date
- 2024-04-22
- Publication Date
- 2026-04-07
AI Technical Summary
In existing technologies, the wireless access point access process of motor vehicle charging systems requires manual input of information, which is prone to errors and lacks automation, and cannot effectively control access permissions and data transmission security.
By establishing a data cable between the vehicle and the charging system, negotiating and automatically configuring the connection of the wireless access point, using encryption methods to ensure that access information is only available to the intended users, negotiating charging current parameters through the data cable, and using a virtual private network to encrypt data transmission.
It enables automated configuration of wireless access points, improves the ease and security of the access process, ensures access is only available to reserved users, and protects the data security of the charging system through encrypted data transmission.
Smart Images
Figure CN121816290A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to wireless data transmission to motor vehicles. In particular, this invention relates to accessing data networks using wireless access points. Background Technology
[0002] The motor vehicle includes an electric energy storage device and is configured to be driven by energy from the energy storage device. To charge the energy storage device, the motor vehicle can be connected to a charging system. The charging system provides a predetermined charging current that flows through the energy storage device and recharges it. To provide alternative work possibilities to occupants of the motor vehicle while it is stopped at the charging system, a wireless access point can be provided, which can be used by occupants, for example, using a smartphone. The access point may allow data transmission between the smartphone and a predetermined data network, such as the Internet.
[0003] For example, to avoid overloading the access point's bandwidth, its use can be restricted to users or customers of the charging system. The charging system may include a display that shows access information for the access point when charging begins. This access information can, for example, be manually transmitted to a smartphone to enable data connectivity.
[0004] This makes it impossible to automate the control of access points. Manually entering access information on the user's device or, for example, a vehicle can be cumbersome and prone to errors. Summary of the Invention
[0005] The objective of this invention is to provide an improved technique for wireless data transmission in controlling a charging system. This invention addresses this objective through the technical solutions provided in the independent claims. The dependent claims provide preferred embodiments.
[0006] According to a first aspect of the invention, the method includes the steps of: establishing a charging connection between a motor vehicle and a charging system, wherein the charging connection includes an energy conductor and a data conductor; negotiating a data connection between a wireless access point of the motor vehicle and the charging system via the data conductor; and establishing the data connection.
[0007] It is recognized that a data cable is established between the vehicle and the charging system to charge the energy storage device in a motor vehicle. Therefore, it is proposed to use this data cable to negotiate a data connection between the vehicle and the access point. Subsequently, the vehicle can wirelessly exchange data with the access point. Afterward, it is no longer necessary to transmit useful data via the data cable. The proposed technology can help simplify and securely establish a wireless access point to the charging system. Manual input of access information provided by the charging system is unnecessary. At the same time, the charging system can be protected from unauthorized use of the access point.
[0008] Negotiation may include transmitting access information to the vehicle. The access point may, in particular, include a wireless LAN router. The access information may include a site identifier, the frequency used, or a password. The vehicle can be automatically configured based on the access information to communicate with the access point. It may not be necessary to publicly disclose the access information, for example, as a string of text or as a QR code.
[0009] In one implementation, the access information is transmitted in encrypted form. This can be achieved using asymmetric cryptography. The method can support PKI (Public Key Infrastructure), where participants' public keys can be downloaded via PKI. Thus, the charging system can encrypt the access information using the vehicle's public key and provide it to the vehicle. The vehicle can then decrypt the access information using its own private key. This ensures that the access information is only accessible to a predetermined user or user group. For example, in the charging system, two different user groups may be known, where the first group should have access to the access point, while the second group should not. By means of cryptographic custody or PKI, it can be confirmed which of the two groups the intended vehicle belongs to. The encrypted access information may be completely inaccessible to members of the second group. Even if the access information has been accessed, it can be encrypted such that only members of the first group can decrypt it.
[0010] Preferably, the charging current is negotiated via the data lines and provided through the charging connection. For example, the charging system can provide different voltages and voltage forms, particularly DC or AC. The voltage and voltage form used, as well as the maximum available power or maximum current, can also be negotiated via the data lines. Charging current can only be provided to the vehicle when the vehicle and the charging system agree on the method of energy exchange. These methods primarily involve physical parameters. Optionally, the settlement method can also be determined before the charging current is connected. The charging current can flow through the electric energy storage device in the vehicle and electrically charge it. The technology described herein can generally be applied to any type of charging system for motor vehicles. This can include fast charging stations, for example, provided alongside highways. Similarly, lower-performance charging stations, for example, in urban areas, can be equipped with the technology.
[0011] In another embodiment, it can be determined that no charging current flows through the energy conductor; and the access point can be manipulated to not exchange further data with the vehicle. In other words, the validity period of the access information can be the same as the duration of the charging process of the vehicle at the charging system. When the charging process ends, the data connection can be disconnected immediately or after a predetermined extension period. In another embodiment, the validity period of the access information is also limited in time, for example, to about 2 hours or a duration corresponding to the average or maximum common charging duration.
[0012] According to another aspect of the invention, a charging system includes: a wireless access point to a data network; means for establishing a charging connection to a motor vehicle, wherein the charging connection includes an energy conductor for providing charging current and a data conductor for communicating with the connected motor vehicle; and a control device configured to negotiate a wireless connection to the access point via the data conductor.
[0013] Preferably, the control device is also configured to negotiate the supply of charging current through the energy conductor via the data conductor. In motor vehicles, the energy conductor may be connected to an electrical storage device configured to store electrical energy for driving the motor vehicle.
[0014] The access point of the charging system can be connected to a predetermined data network. This data network may include, for example, the Internet or a mobile radio network. Alternatively, a private network may also be connected to the access point. Devices wirelessly coupled to the access point, particularly the motor vehicle described herein, can communicate with other devices connected to the predetermined data network.
[0015] According to another aspect of the invention, the motor vehicle includes an electric energy storage device and a wireless interface. Here, the motor vehicle is configured to connect to a charging system via a charging connection; wherein the charging connection includes an energy conductor for providing charging current and a data conductor for communicating with the charging system. The motor vehicle is also configured to negotiate a data connection via the data conductor to a wireless access point of the charging system from the wireless interface.
[0016] The motor vehicle preferably includes a motorcycle, a car, a truck, or a bus. More preferably, the motor vehicle includes an electric drive unit that can use energy from an electrical storage device to drive the motor vehicle.
[0017] Preferably, the vehicle is configured to establish a data connection to another device and to transmit data between the other device and the access point. Alternatively, the other device may be connected to the vehicle wirelessly or via a wired connection. In one embodiment, the other device may communicate with the vehicle via the same wireless interface as the vehicle to the access point. The other device may in particular include personal devices of occupants of the vehicle. Personal devices may in particular include smartphones, laptops, or tablets. Other devices, such as navigation systems or entertainment systems, are also possible. The vehicle may serve as a central access point for the other device to access the data network connected to the access point. Optionally, the vehicle includes an additional wireless interface for connecting to a mobile radio network to provide data connectivity to a predetermined data network, particularly the Internet, even in the absence of a connection to the access point for the charging system. This connection can be utilized, particularly during vehicle operation, to enable devices on the vehicle to interact with the data network.
[0018] In another preferred embodiment, the vehicle is configured to transmit data exchanged with the access point to a predetermined device via an encrypted channel. A technique known as a Virtual Private Network (VPN) can be used here. An encrypted channel can be established between the vehicle and other devices accessible via the access point's data network. Data to be exchanged between the vehicle or connected devices and network resources can be transmitted in encrypted form between the vehicle and the other devices. From there, further connections to the resources can be established. In this way, it is particularly effective to prevent the interception, copying, or other misuse of sensitive or personal data within the charging system or its connected information processing systems.
[0019] The motor vehicle and / or the charging system described herein may be configured to perform the methods described herein in part, respectively. The motor vehicle and the charging system may each include a processing device, preferably implemented electronically and, for example, may include an integrated circuit, a programmable logic module, or a programmable microcomputer. The method may be implemented as a computer program product configured or having program code means for the processing device. The configuration or computer program product may be stored on a computer-readable data carrier. Features or advantages of the method may be transferred to the charging system or the motor vehicle, or vice versa. Advantages or features may be transferred between the motor vehicle and the charging system in a corresponding manner. Attached Figure Description
[0020] The invention will now be described in more detail with reference to the accompanying drawings, in which:
[0021] Figure 1 The system is shown;
[0022] Figure 2 A flowchart illustrating the method is shown; and
[0023] Figure 3 The network is shown. Detailed Implementation
[0024] Figure 1 The diagram illustrates a system 100, which includes a motor vehicle 105 and a charging system 110. The motor vehicle 105 exemplarily includes a sedan, to which occupants 115, particularly a driver or passenger, can be assigned. Occupants 115 can be assigned mobile devices 120, which may in particular include smartphones or wearable devices.
[0025] The motor vehicle 105 is equipped with an electrical energy storage device 125, which is configured to store electrical energy that can be used to drive the motor vehicle 105 via an electric drive motor 130. Furthermore, the motor vehicle 105 is equipped with a wireless interface 135, which is configured to establish a wireless connection to an access point and exchange data with the access point. A control device 140 may also be provided.
[0026] The charging system 110 preferably includes a charging device 150 and a wireless access point 155. The charging device 150 is typically connected to an energy supply network. A charging connection 160 can be established between the charging device 150 and the vehicle 105, the charging connection including an energy conductor 165 and a data conductor 170. The energy conductor 165 and the data conductor 170 are implemented as wired and are typically included by a common cable. The vehicle 105 can connect to or disconnect from the charging connection 160 by means of a plug connector.
[0027] Wireless access point 155 is preferably connected to a data network, such as the Internet.
[0028] A wireless connection can be established between the wireless interface 135 of the vehicle 105 and the wireless access point 155 of the charging system 110. This may require predetermined access information.
[0029] When the vehicle 105 is connected to the charging device 150 via the charging connection 160, it can communicate via the data cable 170 according to a predetermined protocol to negotiate the provision of charging current through the energy cable 165. It is proposed that information required for establishing a wireless connection between the vehicle 105 or the wireless interface 135 and the wireless access point 155 is also exchanged via the same data cable 170.
[0030] It is also proposed that vehicle 105 serves as a central access point for communications of devices 120, 140 installed on or assigned to vehicle 105. Communication can be conducted via wireless access point 155 in or through a data network connected to it.
[0031] Figure 2 A flowchart is shown for a method 200 for controlling wireless data transmission between a motor vehicle 105 and a charging system 110.
[0032] In step 205, a charging connection 160 can be established between the vehicle 105 and the charging device 150. Here, not only the energy cable 165 can be connected, but also the data cable 170.
[0033] In step 210, the vehicle 105 can be controlled to receive energy from the charging device 150. For example, it can be specified what amount of energy should be received, for how long it should be used, or in what manner payment should be made for it.
[0034] In step 215, data exchange can occur between the charging device 150 and the vehicle 105. In a known manner, data exchange can be used to negotiate the provision of charging current through the energy conductor 165.
[0035] In step 220, charging operation of the vehicle 105 or its electrical accumulator 125 at the charging device 150 can be activated. The charging current flowing here can be negotiated in advance.
[0036] It is proposed that, in step 215, additional information be transmitted from the charging device 150 to the vehicle 105. This additional information preferably also includes access information required to establish a wireless connection to the access point 155. The access information may, for example, include a site identifier (Service Set Identifier, SSID) and / or a secret required for access.
[0037] Based on the transmitted access information, a wireless connection can be established between interface 135 and access point 155 in step 230. The access point 155 can establish the wireless connection for a predetermined time. Optionally, the connection can be terminated when the charging process of vehicle 105 at charging device 150 ends or when vehicle 105 disconnects the charging connection 160. In this case, the access information to access point 155 can be internally interpreted as invalid, and thus it can no longer be used to establish a connection or transmit data.
[0038] In step 235, a Virtual Private Network (VPN) can be initiated on the existing wireless connection to access point 155 on the vehicle 105. The endpoint of the VPN is located in a data network accessible through access point 155.
[0039] In step 240, vehicle 105 may accept connections from additional devices assigned to vehicle 105. If a connection is established, data can be routed between the additional devices and the data network via access point 155. Preferably, the data is routed via a VPN, so that the data exists only in encrypted form at the access point 155.
[0040] Figure 3 An exemplary network 300 is shown, which can be generated when a vehicle 105 is wirelessly connected to an access point 155.
[0041] The vehicle 105 itself or control devices included in the vehicle, as well as one or more devices 120 located on or assigned to the vehicle 105, may be connected to the control device 140. Such devices 120 may, in particular, include mobile devices assigned to personnel 115 of the vehicle 105. Alternatively, a local data connection to the control device 140 may be made wired or wirelessly.
[0042] Control device 140 is connected to data network 305, specifically via access point 155, and a predetermined endpoint 310 is also connected to said data network. Endpoint 310 may connect to one or more resources 320 via another data network 315. Resources 320 may include, for example, web servers, mail servers, chat servers, or other information providers or services.
[0043] Device 120 or vehicle 105 can communicate with each resource 320 via control device 140. Data networks 305 and 315 can overlap, and endpoint 310 can be initially unused.
[0044] However, it is preferable to use VPN 325, which includes an encrypted data channel between control device 140 and endpoint 310. Data can be encapsulated and encrypted during transmission along the path between endpoints of VPN 325. Endpoint 310 can include any device, such as a device assigned to personnel 115 or a public or commercial service. Using VPN 325 can create the impression that resource 320 is always communicating with endpoint 310, even if endpoint 310 is only representatively forwarding data from vehicle 105 or device 120.
[0045] Figure Labels
[0046] 100 System
[0047] 105 Motor vehicles
[0048] 110 charging system
[0049] 115 personnel
[0050] 120 mobile devices
[0051] 125 Electric accumulator
[0052] 130 drive unit
[0053] 135 wireless interface
[0054] 140 Control device
[0055] 150 charging device
[0056] 155 Wireless Access Points
[0057] 160 Charging Connection
[0058] 165 Energy Wire
[0059] 170 data wires
[0060] 200 methods
[0061] 205 Establish charging connection
[0062] 210 Control Energy Reception
[0063] 215 Data Exchange
[0064] 220 Activate charging operation
[0065] 225 Wireless LAN access parameters
[0066] 230 Establish a wireless LAN connection
[0067] 235 Start VPN
[0068] 240 Accept connection
[0069] 300 Network
[0070] 305 Data Network
[0071] 310 endpoint
[0072] 315 Data Network
[0073] 320 Resources
[0074] 325 VPN
Claims
1. A method (200), the method comprising the following steps: - Establish (205) a charging connection (160) between the motor vehicle (105) and the charging system (110); -The charging connection (160) includes an energy wire (165) and a data wire (170). - Negotiating (215) a data connection between the vehicle (105) and the wireless access point (155) of the charging system (110) via a data cable (170); and - Establish the data connection described in (230).
2. The method (200) according to claim 1, wherein, The negotiation (215) includes transmitting access information to the motor vehicle (105).
3. The method (200) according to claim 2, wherein, The access information is transmitted in encrypted form (215).
4. The method (200) according to any one of the preceding claims, wherein, The charging current is negotiated via the data cable (170) and provided via the charging connection (160).
5. The method (200) according to any one of the preceding claims, wherein it is determined that no charging current flows through the energy conductor (165); and the access point (155) is controlled to not exchange further data with the vehicle (105).
6. A charging system (110), the charging system comprising: - Wireless access point for data network (155); - A device for establishing a charging connection (160) to a motor vehicle (105); -The charging connection (160) includes an energy conductor (165) for providing charging current. - and a data cable (170) for communicating with the connected motor vehicle (105); and - Control device (140), the control device is configured to negotiate a wireless connection from the device to the access point (155) via a data cable (170).
7. The charging system (110) according to claim 6, wherein, The control device is configured to negotiate the supply of charging current through the energy wire (165) via the data wire (170).
8. The charging system (110) according to claim 6 or 7, wherein, The access point (155) is connected to a predetermined data network (305, 315).
9. A motor vehicle (105) having an electrical energy storage device (125) and a wireless interface (135). -in, The motor vehicle (105) is configured to connect to the charging system (110) via a charging connection (160); -The charging connection (160) includes an energy wire (165) for providing charging current and a data wire (170) for communicating with the charging system (110). -The vehicle (105) is also configured to negotiate a data connection between the wireless interface (135) and the wireless access point (155) of the charging system (110) via a data cable (170).
10. The motor vehicle (105) according to claim 9, wherein, The vehicle (105) is configured to establish a data connection to another device (120); and to transmit data between the other device (120) and the access point (155).
11. The motor vehicle (105) according to claim 9 or 10, wherein, The vehicle (105) is configured to transmit data exchanged with the access point (155) to predetermined devices (310, 320) via an encrypted channel (325).