Dual-mode charging method based on unmanned vehicle

Abstract

The invention discloses a dual-mode charging method based on an unmanned vehicle, and the method comprises the steps: enabling a wireless charging module to receive a wireless excitation signal when a vehicle enters a wireless charging region, and enabling a CC signal and a charging activation signal through a signal line; a charging activation signal bypasses the diode compatible module and is directly transmitted to the domain controller, after the BMS receives a charging relay enabling instruction and detects a CC signal, the charging relay is closed, and the wireless charging module starts charging; when the wired charging plug is inserted into the socket, the wired charging module starts charging, the wired charging module enables a CC signal and a charging activation signal through a control unit in the wired charging module, and the CC signal and the charging activation signal are transmitted to the BMS and the domain controller through the diode compatible module. By introducing the common wire harness and the diode compatible module, the flexibility and adaptability of the system are improved, the use amount and occupied space of the wire harness are reduced, the overall cost is reduced, and the reliability of the system is improved.

Description

Technical Field

[0001] The present invention relates to the field of charging technology, and in particular to a dual-mode charging method based on an unmanned vehicle. Background Art

[0002] Existing unmanned vehicles need to provide both wireless charging and wired charging functions. When the wireless charging module and the wired charger share the wiring harness, the charging activation signal line of the wireless charging module cannot provide 12V voltage when using wireless charging, resulting in the battery pack charger being unable to close. The reason is that the resistance at the wired charger end is too small compared to the domain controller end, resulting in voltage division, which causes the charging activation signal line voltage output to be too low and the domain controller cannot detect the charging activation signal. If the two charging modes of the vehicle are controlled separately by two sets of wiring harnesses, the cost of wiring harness layout will increase and space will be wasted. In addition, due to the increase in detection signal pins, the domain controller and BMS control system cannot achieve unified control, resulting in longer software development time.

[0003] For example, Chinese patent announcement number CN108482148B discloses a dual-mode charging system and method for electric vehicles, including a DC wired charging circuit and a wireless charging circuit. The DC wired charging circuit includes a charging gun, a ground auxiliary power supply, an AC / DC module and a CSU; the wireless charging circuit includes a transmitter, a receiver, a ground transparent transmission module, a vehicle-mounted transparent transmission module, an IVU, a vehicle-mounted auxiliary power supply, and an AC / DC module and a CSU shared with the DC wired charging circuit. During the wireless charging process, the IVU simulates the wired charging process to power the BMS and transmit the charging connection signal, and the BMS and CSU communicate in transparent transmission mode. Since the transparent transmission mode does not process the communication data, the wireless charging method can use the communication protocol standard of the wired charging method to achieve communication, thereby solving the compatibility problem between wireless charging and wired charging.

[0004] The use of wiring harnesses in the comparative documents results in higher wiring harness costs and longer software development time. There is no function to identify dual-mode charging methods, which affects charging efficiency. Summary of the invention

[0005] The present application provides a dual-mode charging method based on an unmanned vehicle, which achieves compatibility between wireless charging and wired charging by sharing a wiring harness and adding a diode compatible module, thereby improving the flexibility and adaptability of the system.

[0006] The present application provides a dual-mode charging method based on an unmanned vehicle, comprising:

[0007] S101, when the vehicle enters the wireless charging area, the wireless charging module receives a wireless excitation signal from the wireless charging wall, and the wireless charging module enables a CC signal and a charging activation signal through a signal line;

[0008] S102, the charging activation signal bypasses the diode compatible module and is directly transmitted to the domain controller. After receiving the charging activation signal, the domain controller sends a charging relay enable command to the BMS via a CAN signal;

[0009] S103, after the BMS receives the charging relay enable command and detects the CC signal, it closes the charging relay, and the wireless charging module starts charging. The wireless charging module adjusts the charging voltage and current according to the request of the BMS, and charges the BMS through the high-voltage wiring harness. After charging is completed, the domain controller sends a stop charging command, and the wireless charging module stops charging and disconnects related signals;

[0010] S104, when the wired charging plug is inserted into the socket, the wired charging module starts charging, and the wired charging module enables the CC signal and the charging activation signal through its internal control unit, and the CC signal and the charging activation signal are transmitted to the BMS and the domain controller through the diode compatible module;

[0011] S105, after receiving the charging activation signal, the domain controller sends a charging relay enable instruction to the BMS via the CAN signal. After the BMS receives the instruction and detects the CC signal, it closes the charging relay, so that the wired charging module starts charging.

[0012] Preferably, the CC signal is a signal used for communication during the charging process, so that the wireless charging module exchanges information with the battery management system on the vehicle. The charging activation signal is a 12V voltage signal used to activate the charging process. When the wireless charging module starts charging, the charging activation signal is sent through the signal line.

[0013] Preferably, the CAN signal is an internal vehicle communication protocol that enables information to be exchanged between different electronic modules.

[0014] Preferably, the steps of installing the intelligent identification module on the domain controller are:

[0015] S201, integrating an intelligent recognition module and programming the intelligent recognition module;

[0016] S202, the domain controller receives a charging activation signal from the charging system, and the intelligent recognition module analyzes the received charging activation signal to determine whether the current charging is wireless charging or wired charging;

[0017] S203: According to the recognition result of the intelligent recognition module in step S202, the domain controller generates a charging permission instruction.

[0018] Preferably, a feature template of the wireless charging signal and a feature template of the wired charging signal are preset in the intelligent identification module, the feature template of the wireless charging signal includes a specific frequency, waveform or modulation method of the charging activation signal during wireless charging, and the feature template of the wired charging signal includes fixed voltage and current characteristics of the charging activation signal during wired charging. The received charging activation signal is compared with the feature template of the wireless charging signal and the feature template of the wired charging signal. If the received charging activation signal is the same as the feature template of the wireless charging signal, it is wireless charging; otherwise, it is wired charging.

[0019] Preferably, the steps of introducing the transparent transmission mode are:

[0020] S301, initializing the BMS and the domain controller and establishing a communication connection;

[0021] S302, after the communication channel is established, setting the transparent transmission mode;

[0022] S303, transparently transmit the data of the wireless charging process;

[0023] S304, charging status feedback.

[0024] Preferably, the transparent transmission mode is a special communication mode, and the transparent transmission module does not process or modify the data in any form during the data transmission process.

[0025] Preferably, the BMS collects real-time status data of the battery, and encapsulates the collected data into data packets that comply with the wired charging communication protocol standard. The BMS sends the data packets to the domain controller in a transparent transmission mode without performing any processing or modification on the data packets. After receiving the data packets, the domain controller directly forwards them to other related components of the wireless charging system, and also does not process the data packets.

[0026] One or more technical solutions provided in this application have at least the following technical effects or advantages: the introduction of a common wiring harness and a diode compatible module improves the flexibility and adaptability of the system, reduces the amount of wiring harness used and the space occupied, reduces the overall cost, and reduces potential failure points by simplifying the system structure, thereby significantly improving the reliability of the system;

[0027] The addition of intelligent recognition function can identify the charging method in real time, whether it is wired or wireless, and can automatically adjust the charging strategy to optimize the charging process. This dynamic adjustment mechanism not only improves the charging efficiency, but also ensures the safety of the charging process, providing users with a more stable and efficient charging experience. At the same time, intelligent operation greatly reduces manual intervention, making the system more convenient and easy to use, and enhancing the user experience;

[0028] In addition, the adoption of transparent transmission mode communication further simplifies the wireless communication method and reduces the difficulty and cost of system implementation. As a direct and efficient communication method, transparent transmission mode enables wireless charging to be compatible with the communication protocol standard of wired charging, solving the compatibility problem between the two. For wireless charging vehicles, the system communicates with the vehicle through transparent transmission mode, simulates the wired charging process, powers the battery management system and transmits the charging connection signal, realizing the automation and intelligence of the charging process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of a dual-mode charging method based on an unmanned vehicle according to the present invention;

[0030] Figure 2 A schematic diagram of the structure of compatibility between wireless charging and wired charging according to an embodiment of the present invention;

[0031] Figure 3 A schematic diagram of the process of wireless charging and wired charging according to an embodiment of the present invention;

[0032] Figure 4 FIG. 4 is a flow chart of the wireless charging logic according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0034] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0036] Embodiment 1: Figure 1 and Figure 2 A dual-mode charging method based on an unmanned vehicle according to an embodiment of the present invention comprises the following steps:

[0037] S101, when the vehicle enters the wireless charging area, the wireless charging module receives a wireless excitation signal from the wireless charging wall, and the wireless charging module enables a CC signal and a charging activation signal through a signal line;

[0038] Specifically, when the unmanned vehicle enters the preset wireless charging area, the wireless charging receiving device at the bottom of the vehicle begins to align with the wireless charging transmitting device on the ground. After the unmanned vehicle is parked in place, the wireless charging transmitting device will send a wireless excitation signal (such as a radio frequency signal) to the wireless charging receiving module on the vehicle. The CC signal is a signal used for communication during the charging process, allowing the wireless charging module to exchange information with the battery management system (BMS) on the vehicle. The charging activation signal is a 12V voltage signal used to activate the charging process. When the wireless charging module is ready to start charging, it will send a charging activation signal through the signal line.

[0039] S102, the charging activation signal bypasses the diode compatible module and is directly transmitted to the domain controller. After receiving the charging activation signal, the domain controller sends a charging relay enable command to the BMS via a CAN signal;

[0040] Furthermore, the diode compatible module can ensure that the charging activation signal is not divided or interfered by other circuits (such as the wired charging terminal) during the transmission process. The unidirectional conductivity of the diode can ensure the unidirectional transmission of the signal. The domain controller receives and processes signals from each module. The domain controller receives the charging activation signal and sends a charging relay enable instruction to the BMS via a CAN signal. The CAN signal is an internal communication protocol of the vehicle that enables information to be exchanged between different electronic modules. The charging relay enable instruction is an instruction for the BMS to prepare to start charging.

[0041] S103, after the BMS receives the charging relay enable command and detects the CC signal, it closes the charging relay, and the wireless charging module starts charging. The wireless charging module adjusts the charging voltage and current according to the request of the BMS, and charges the BMS through the high-voltage wiring harness. After charging is completed, the domain controller sends a stop charging command, and the wireless charging module stops charging and disconnects related signals;

[0042] Specifically, the charging relay is a physical switch used to control the on and off of the charging circuit. During the charging process, the BMS will continuously monitor the status of the battery (such as temperature, voltage, current, etc.) and send adjustment requests to the wireless charging module based on this information. The wireless charging module will dynamically adjust the charging parameters based on these requests to ensure the safety and efficiency of the charging process. The high-voltage harness is a high-voltage cable connecting the wireless charging module and the BMS, which is used to transmit the charging current. Due to the large charging current, a high-voltage harness that can withstand high voltage and high current is used. When the BMS detects that the battery is full or reaches the preset charging limit, the BMS sends a charging completion signal to the domain controller. After receiving the charging completion signal, the domain controller will send a stop charging instruction to the wireless charging module via the CAN signal. After receiving the instruction, the wireless charging module will immediately stop charging and disconnect all signal connections with the BMS.

[0043] S104, when the wired charging plug is inserted into the socket, the wired charging module starts charging, and the wired charging module enables the CC signal and the charging activation signal through its internal control unit, and the CC signal and the charging activation signal are transmitted to the BMS and the domain controller through the diode compatible module;

[0044] The wired charging module enables the CC signal and charging activation signal (12V) through its internal control unit. The CC signal and charging activation signal are directly transmitted to the BMS and domain controller (bypassing the diode compatible module). The wired charging plug is inserted into the charging socket of the unmanned vehicle. After the control unit inside the wired charging module detects that the plug has been correctly inserted into the socket, it automatically starts the charging preparation process. The control unit of the wired charging module enables the CC (charging connection confirmation) signal through the internal circuit, which is usually a low-level or high-level signal used to confirm that the charging connection has been established. The control unit also generates a 12V charging activation signal, which indicates that the charging module is ready to start charging. The CC signal and charging activation signal are directly transmitted to the BMS (battery management system) and domain controller without passing through the diode compatible module to ensure fast and accurate signal transmission.

[0045] S105, after receiving the charging activation signal, the domain controller sends a charging relay enable instruction to the BMS via the CAN signal. After the BMS receives the instruction and detects the CC signal, it closes the charging relay, so that the wired charging module starts charging.

[0046] The technical solutions in the above-mentioned embodiments of the present application have at least the following technical effects or advantages: by sharing the wiring harness and adding a diode compatible module, the compatibility of wireless charging and wired charging is achieved, the flexibility and adaptability of the system are improved, and the shared wiring harness reduces the wiring harness cost and wiring harness space, thereby reducing the overall cost of the system; through the design of the diode compatible module and the shared wiring harness, the complexity and failure points of the system are reduced, thereby improving the reliability of the system.

[0047] Embodiment 2: Based on embodiment 1, this embodiment adds intelligent identification and control functions. The domain controller can not only receive the charging activation signal, but also automatically identify whether it is wireless charging or wired charging, and send corresponding charging instructions according to the identification result, such as Figure 3 shown.

[0048] S201, integrating an intelligent recognition module and programming the intelligent recognition module;

[0049] Furthermore, the charging system is analyzed, and an intelligent identification module is selected based on the analysis results. The intelligent identification module is installed on the domain controller so that the intelligent identification module can be easily connected to other parts of the domain controller (such as the processor, communication interface, etc.). According to the communication protocol and control instructions of the intelligent identification module, a corresponding driver is written for the domain controller. The driver should be able to implement operations such as initialization, configuration, data reading and writing of the intelligent identification module. In the software system of the domain controller, a corresponding interface code is written for the intelligent identification module, and the driver and interface code are integrated into the software system of the domain controller.

[0050] S202, the domain controller receives a charging activation signal from the charging system, and the intelligent recognition module analyzes the received charging activation signal to determine whether the current charging is wireless charging or wired charging;

[0051] Specifically, a feature template of the wireless charging signal and a feature template of the wired charging signal are preset in the intelligent identification module. The feature template of the wireless charging signal includes a specific frequency, waveform or modulation method of the charging activation signal during wireless charging. The feature template of the wired charging signal includes fixed voltage and current characteristics of the charging activation signal during wired charging. The received charging activation signal is compared with the feature template of the wireless charging signal and the feature template of the wired charging signal. At the same time, the intelligent identification module determines whether it is wireless charging or wired charging by monitoring the connection status of the charging interface.

[0052] S203: According to the recognition result of the intelligent recognition module in step S202, the domain controller generates a charging permission instruction.

[0053] Specifically, the charging permission instruction includes information about the charging method so that the BMS can identify and adopt an appropriate charging strategy. The domain controller sends the charging permission instruction to the BMS via the CAN signal to ensure that the transmission process of the instruction is stable and reliable, and can be correctly received and parsed by the BMS. After receiving the charging instruction from the domain controller, the BMS controls the closing of the charging relay according to the instruction and the CC signal. The BMS communicates with the charging module through the CAN signal and adjusts the charging voltage and current according to the charging specifications and charging method information of the battery pack. The BMS monitors the charging status in real time, including the voltage, current, temperature and other parameters of the battery pack.

[0054] The technical solutions in the above-mentioned embodiments of the present application have at least the following technical effects or advantages: the added intelligent recognition function significantly improves the flexibility and adaptability of the system. The intelligent recognition function identifies the charging mode in real time, whether it is wired or wireless, and can automatically adjust the charging strategy to optimize the charging process. This dynamic adjustment not only improves the charging efficiency, but also ensures the safety of the charging process. In addition, intelligent operation reduces manual intervention, enhances user experience, and makes the system more intelligent and convenient.

[0055] Embodiment 3: Based on Embodiment 2, transparent transmission mode communication is introduced, and the transmission data is not processed, so that wireless charging can adopt the communication protocol standard of wired charging, thereby further solving the compatibility problem between wireless charging and wired charging. This solution not only retains the advantages of intelligent identification and control, but also simplifies the communication method through transparent transmission mode, reducing the difficulty and cost of system implementation. Figure 4 shown.

[0056] S301, initializing the BMS and the domain controller and establishing a communication connection;

[0057] Specifically, the BMS and the domain controller configure their own communication interfaces respectively, select appropriate communication protocols (such as CAN, LIN, Ethernet, etc.), set communication speed, baud rate and other parameters, set timeout period, number of retries, data verification method and other parameters. After completing the initialization settings, the BMS will send a connection request to the domain controller through a preset communication channel (such as CAN bus, wireless module, etc.). The connection request usually contains the identification information of both parties (such as device ID, MAC address, etc.), communication protocol version, type of requested connection (such as transparent mode connection), etc. After receiving the connection request, the domain controller will determine whether to accept the connection request based on this information.

[0058] S302, after the communication channel is established, setting the transparent transmission mode;

[0059] Furthermore, the transparent transmission mode is a special communication mode, which requires the transparent transmission module not to process or modify the data in any form during the data transmission process, and configures the communication interface to the transparent transmission mode.

[0060] S303, transparently transmit the data of the wireless charging process;

[0061] Specifically, when the electric vehicle enters the wireless charging area and starts the wireless charging process, the BMS begins to collect the real-time status data of the battery (such as voltage, current, temperature, etc.). The BMS encapsulates the collected data into data packets that comply with the wired charging communication protocol standard. The BMS sends the data packets directly to the domain controller in transparent transmission mode without any processing or modification of the data packets. After receiving the data packets, the domain controller directly forwards them to other related components of the wireless charging system (such as the ground communication control unit CSU), which also does not process the data packets.

[0062] S304, charging status feedback.

[0063] During the wireless charging process, the domain controller may need to generate charging control instructions based on the data sent by the BMS or external instructions. The domain controller encapsulates the charging control instructions into data packets and sends them to the BMS through the transparent transmission mode. After receiving the charging control instructions, the BMS parses and performs the corresponding operations. After performing the operation, the BMS sends the operation results or new battery status data to the domain controller again through the transparent transmission mode to form a closed-loop feedback. When the wireless charging process ends (such as the battery is full, the user manually stops, etc.), the BMS sends a charging end signal to the domain controller. After receiving the charging end signal, the domain controller confirms that the wireless charging system has entered a safe state. Both parties send instructions to disconnect the communication connection through the transparent transmission mode and close the communication interface.

[0064] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0065] Transparent transmission mode communication simplifies the way of wireless communication and reduces the difficulty and cost of system implementation. Transparent transmission mode is a simpler and more direct communication method. It does not perform any form of processing on the transmitted data (such as truncation, grouping, encoding, encryption, etc.), and directly transmits the data from the sender to the receiver. Through transparent transmission mode communication, wireless charging can adopt the communication protocol standard of wired charging, solving the compatibility problem between wireless charging and wired charging.

[0066] For wireless charging vehicles, the system communicates with the vehicle in transparent transmission mode, simulating the wired charging process to power the BMS and transmit the charging connection signal. The entire charging process does not require human intervention, achieving automation and intelligence. At the same time, due to the simplified communication method, the charging process has become more efficient and shortened the charging time.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dual-mode charging method based on an unmanned vehicle, characterized in that: include: S101, when the vehicle enters the wireless charging area, the wireless charging module receives a wireless excitation signal from the wireless charging wall, and the wireless charging module enables a CC signal and a charging activation signal through a signal line; S102, the charging activation signal bypasses the diode compatible module and is directly transmitted to the domain controller. After receiving the charging activation signal, the domain controller sends a charging relay enable command to the BMS via a CAN signal; S103, after the BMS receives the charging relay enable command and detects the CC signal, it closes the charging relay, and the wireless charging module starts charging. The wireless charging module adjusts the charging voltage and current according to the request of the BMS, and charges the BMS through the high-voltage wiring harness. After charging is completed, the domain controller sends a stop charging command, and the wireless charging module stops charging and disconnects related signals; S104, when the wired charging plug is inserted into the socket, the wired charging module starts charging, and the wired charging module enables the CC signal and the charging activation signal through its internal control unit, and the CC signal and the charging activation signal are transmitted to the BMS and the domain controller through the diode compatible module; S105, after receiving the charging activation signal, the domain controller sends a charging relay enable instruction to the BMS via the CAN signal. After the BMS receives the instruction and detects the CC signal, it closes the charging relay, so that the wired charging module starts charging.

2. A dual-mode charging method based on an unmanned vehicle as claimed in claim 1, characterized in that: The CC signal is a signal used for communication during the charging process, enabling the wireless charging module to exchange information with the battery management system on the vehicle. The charging activation signal is a 12V voltage signal used to activate the charging process. When the wireless charging module starts charging, the charging activation signal is sent through the signal line.

3. A dual-mode charging method based on an unmanned vehicle as claimed in claim 1, characterized in that: The CAN signal is an internal vehicle communication protocol that enables information to be exchanged between different electronic modules.

4. A dual-mode charging method based on an unmanned vehicle as claimed in claim 1, characterized in that: To install the Smart Identification Module on a domain controller: S201, integrating an intelligent recognition module and programming the intelligent recognition module; S202, the domain controller receives a charging activation signal from the charging system, and the intelligent recognition module analyzes the received charging activation signal to determine whether the current charging is wireless charging or wired charging; S203: According to the recognition result of the intelligent recognition module in step S202, the domain controller generates a charging permission instruction.

5. A dual-mode charging method based on an unmanned vehicle as claimed in claim 4, characterized in that: A feature template of a wireless charging signal and a feature template of a wired charging signal are preset in the intelligent identification module. The feature template of the wireless charging signal includes a specific frequency, waveform or modulation method of a charging activation signal during wireless charging. The feature template of the wired charging signal includes fixed voltage and current characteristics of the charging activation signal during wired charging. The received charging activation signal is compared with the feature template of the wireless charging signal and the feature template of the wired charging signal. If the received charging activation signal is the same as the feature template of the wireless charging signal, it is wireless charging. Otherwise, it is wired charging.

6. A dual-mode charging method based on an unmanned vehicle as claimed in claim 1, characterized in that: Steps to introduce transparent transmission mode: S301, initializing the BMS and the domain controller and establishing a communication connection; S302, after the communication channel is established, setting the transparent transmission mode; S303, transparently transmit the data of the wireless charging process; S304, charging status feedback.

7. A dual-mode charging method based on an unmanned vehicle as claimed in claim 6, characterized in that: The transparent transmission mode is a special communication mode, and the transparent transmission module does not process or modify the data in any form during the data transmission process.

8. A dual-mode charging method based on an unmanned vehicle as claimed in claim 6, characterized in that: BMS collects real-time status data of the battery, and encapsulates the collected data into data packets that comply with the wired charging communication protocol standard. BMS sends the data packets to the domain controller in transparent transmission mode without any processing or modification of the data packets. After receiving the data packets, the domain controller directly forwards them to other related components of the wireless charging system, and also does not process the data packets.

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