Bluetooth and 4G compatible charging method, system and charging pile

Abstract

The invention discloses a Bluetooth and 4G compatible charging method in the technical field of new energy charging, and the method comprises the steps: obtaining a current Bluetooth signal intensity RSSI value through a charging system, and comparing the RSSI value with a preset Bluetooth threshold value X: when the RSSI value is greater than or equal to X, a mobile terminal establishes Bluetooth communication with a charging pile; when the RSSI value is smaller than X, entering a communication mode switching process, obtaining a 4G signal strength RSRP value and comparing the RSRP value with a preset threshold Y, if the RSRP value is greater than or equal to Y, switching to 4G communication, and otherwise, sending out a guide prompt; the communication stability and the use convenience of the charging pile in various scenes are realized through the adaptation and automatic switching mechanism of the Bluetooth and the 4G communication protocol layer, the charging pile is particularly suitable for complex environments such as underground garages and open parking lots, and the user experience and the charging efficiency are improved.

Description

Technical Field

[0001] This invention relates to a Bluetooth and 4G compatible charging method, system, and charging pile, belonging to the field of new energy charging technology. Background Technology

[0002] With the large-scale promotion and application of new energy vehicles, charging piles, as their basic supporting infrastructure, are widely deployed in various environments such as residential communities, commercial centers, underground parking garages, and public charging stations. To achieve human-computer interaction and remote control, mainstream charging piles are usually equipped with communication modules, allowing users to control the charging process via mobile phones or other terminal devices. Common communication methods include Bluetooth communication and 4G communication.

[0003] Bluetooth communication has advantages such as low power consumption, fast response, and no data usage, making it suitable for scenarios where users operate at close range (such as standing next to a charging station). However, Bluetooth communication is limited by physical distance and obstacles, with a connection range typically within 10 meters, and the signal is easily affected by obstructions such as walls and vehicles, leading to unstable connections.

[0004] 4G communication offers the advantage of wide-area coverage and enables remote control, allowing users to start, monitor, or stop the charging process even when they are not present. However, 4G communication relies on cellular network signals, and in enclosed spaces such as underground parking garages and high-density buildings, signal quality is easily interfered with, resulting in high latency and connection failures. Currently, most charging pile systems only support a single communication method, namely Bluetooth and 4G versions, which are incompatible with each other. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology. The existing charging pile communication method is single and cannot intelligently switch according to the actual signal environment, which leads to the problem of inconvenience for users due to unstable connection.

[0006] To solve the above-mentioned technical problems, the present invention is implemented using the following technical solution: In a first aspect, a Bluetooth and 4G compatible charging method is provided, including instant charging, wherein the instant charging includes the following steps: Obtain the current Bluetooth signal strength RSSI value and compare it with the preset Bluetooth threshold X: When the RSSI value is greater than or equal to X, the mobile device establishes Bluetooth communication with the charging station. When the RSSI value is less than X, the mobile terminal establishes 4G communication with the charging pile after entering the communication mode switching process. Among them, 4G communication and Bluetooth communication are adapted at the protocol layer of the network model, and the communication mode switching process includes: Obtain the current 4G signal strength RSRP value and compare it with the preset 4G threshold Y. If the RSRP value is greater than or equal to Y, switch to 4G communication for charging control; If the RSRP value is less than Y, a guidance prompt will be issued.

[0007] Furthermore, establishing Bluetooth communication with the charging station includes: The mobile device sends a reference signal to the charging station. The charging pile transmits a sampling signal back to the mobile terminal based on the received reference signal; After confirming the frequencies of reference signal one and sampling signal one, the mobile device establishes Bluetooth communication with the charging pile.

[0008] Furthermore, after establishing Bluetooth communication, the charging pile includes: intermittently acquiring RSRP values; The charging pile sends a reference signal 2 via Bluetooth to the mobile terminal; The mobile terminal transmits a sampling signal back to the charging pile based on the received reference signal.

[0009] Furthermore, the communication method switching process also includes: temporary database storage method; The Bluetooth / 4G communication process includes data being transmitted during the communication mode switching process. This data is temporarily stored in a database and retransmitted after the communication mode switching process is completed.

[0010] Furthermore, the application layer in the network model includes the use of MQTT or CoAP.

[0011] Furthermore, it also includes timed charging; The timed charging includes an operation interval and a locking interval; after the locking interval ends, the immediate charging step begins. Among them, after setting the timed charging, the period before Z time is the operation interval, and the period after Z time is the locking interval; Secondly, a Bluetooth and 4G compatible charging system is provided, including: The Bluetooth communication module is used to prioritize establishing a communication connection between the user and the charging pile, obtain the RSSI value, and compare it with the preset value X. The 4G communication module is used to obtain the RSRP value and compare it with the preset value Y when the Bluetooth signal strength is lower than the X value, to determine whether to switch to 4G communication mode; The central processing unit is used to determine the communication status, switch the communication mode, control the charging process, temporarily store the data being sent, and complete the data retransmission after the communication mode is switched.

[0012] Thirdly, a Bluetooth and 4G compatible charging station is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the Bluetooth and 4G compatible charging method described in the first aspect.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: This invention integrates Bluetooth and 4G communication modules into charging piles and sets Bluetooth signal strength thresholds X and 4G signal strength thresholds Y, enabling automatic identification and switching under different communication conditions. When the Bluetooth signal strength RSSI is greater than or equal to threshold X, the system prioritizes establishing Bluetooth communication; when the RSSI is lower than X, the system enters a communication switching process, determining whether to switch to 4G communication by detecting whether the 4G signal strength RSRP is greater than or equal to threshold Y; otherwise, a guidance prompt is issued. This method avoids the problem of users having to manually select the communication mode in different scenarios, improves the continuity and stability of the communication process, and can effectively adapt to the communication needs of various complex environments such as underground garages and open-air venues, thereby improving user convenience and charging experience. Attached Figure Description

[0014] Figure 1 The diagram shown is an overall flowchart of the Bluetooth and 4G compatible charging method provided in Embodiment 1 of the present invention. Figure 2 The diagram shown is a flowchart of the communication method and CPU interaction provided in Embodiment 1 of the present invention. Figure 3 The diagram shown is a flowchart of the Bluetooth communication establishment process provided in Embodiment 1 of the present invention. Detailed Implementation

[0015] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments and specific features in the embodiments are detailed descriptions of the technical solution of the present application, rather than limitations thereof. In the absence of conflict, the embodiments and technical features in the embodiments can be combined with each other.

[0016] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship. Example 1:

[0017] This embodiment provides a charging method compatible with both Bluetooth and 4G, such as... Figure 1As shown, the charging station is equipped with a low-power Bluetooth communication module and a 4G communication module, used for short-range and long-range communication respectively. The system supports automatic switching between Bluetooth and 4G communication methods. The network communication protocol of the system is adapted at the protocol layer, so that data synchronization is not affected during communication switching.

[0018] Specifically, the charging pile provided in this embodiment includes an instant charging process. When a user approaches the charging pile, they open an APP or mini-program on their mobile terminal (such as a mobile phone). Figure 3 As shown, the system first acquires the real-time value of the Bluetooth signal strength RSSI. Taking this embodiment as an example, the Bluetooth signal strength threshold X is set to -70dBm: When the current RSSI value is greater than or equal to -70 dBm, it means that the user is within close range of the charging pile, and the system automatically establishes a Bluetooth connection through the Bluetooth communication module.

[0019] When the RSSI value is less than -70 dBm, the system enters the communication mode switching process and begins to detect the 4G signal strength RSRP value.

[0020] During the communication handover process, the 4G signal strength threshold Y is set to -90dBm: When the current RSRP value is greater than or equal to -90dBm, it will automatically switch to 4G communication, and the 4G module will take over the communication process. When the RSRP value is less than -90dBm, since both Bluetooth and 4G communication cannot connect stably, the system prompts the user in the APP interface to move closer to the charging station or find a location with better signal to operate.

[0021] like Figure 2 As shown, during the communication mode switching process, if there is data that has not yet been transmitted, such as user operation requests or charging control commands, the system temporarily stores it through a data caching mechanism and creates a buffer queue in the database. The data will be transmitted again after the new communication mode is established, ensuring that user commands are not lost and charging information is continuous.

[0022] Specifically, this embodiment provides a Bluetooth communication establishment process. When the RSSI value meets the conditions to enter the Bluetooth connection process, the mobile terminal actively sends a reference signal 1 to the charging pile. In this embodiment, the command instruction AT1 is set. After receiving the command, the charging pile sends back the sampling signal AT1+ΔT1. The mobile terminal parses the ΔT1 parameter to confirm the signal frequency and synchronization accuracy. After confirming that there are no errors, the Bluetooth communication is formally established.

[0023] It is important to note that, to ensure communication quality, the charging station's Bluetooth module sends a reference signal AT2 to the mobile device every 5 seconds during Bluetooth communication. The mobile device then sends back a sampled signal AT2+ΔT2. The charging station then analyzes the RSSI value again to dynamically monitor the stability of the Bluetooth signal.

[0024] This embodiment further provides a timed charging function; the user sets the target charging start time in the APP; the user sets the charging to start at 22:00, and the system controls the countdown based on the current time.

[0025] The Z time threshold is set to 30 minutes, meaning that the operation interval is 30 minutes before the scheduled start time. During this period, the user can cancel or switch to instant charging at any time. If the current time is within 30 minutes before 22:00, that is, after 21:30, the system enters the locked interval, and the user cannot change the setting. The system will automatically start the charging process at 22:00.

[0026] In the instant charging process triggered by a timed start, the system re-determines RSSI and RSRP, selects the appropriate communication method and performs control according to the above steps.

[0027] It is important to note that, to ensure lightweight and stable communication, the system application layer uses the MQTT message queue telemetry transport protocol, or the CoAP restricted application protocol can be selected. Both protocols support data synchronization in low-bandwidth, high-latency, and resource-constrained environments, ensuring uninterrupted sessions and correct command order when switching communication methods. Example 2:

[0028] This embodiment provides a Bluetooth and 4G compatible charging system, including: Bluetooth module: Supports BLE 4.2 and above, with a receiving sensitivity greater than or equal to -90 dBm; 4G module: Supports mainstream network frequency bands of China Mobile, China Unicom, and China Telecom, with a receiving sensitivity greater than or equal to -100 dBm; Central processing unit: processes user commands, controls relay start / stop and charging status feedback, and has a communication interface and a buffer module; Storage unit: Used for temporary storage of data that has not been fully transmitted, supporting a minimum of 100 message queues for buffering; Power control module: responds to CPU instructions to control the contactor to turn on and off, realizing charging start and stop; Display and Interaction Module (Optional): Displays information such as current connection status, communication method, and charging status. Example 3:

[0029] This embodiment provides a Bluetooth and 4G compatible charging station, including: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the Bluetooth and 4G compatible charging method in Embodiment 1.

[0030] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A charging method compatible with Bluetooth and 4G, characterized in that: This includes instant charging, which comprises the following steps: Obtain the current Bluetooth signal strength RSSI value and compare it with the preset Bluetooth threshold X: When the RSSI value is greater than or equal to X, the mobile device establishes Bluetooth communication with the charging station. When the RSSI value is less than X, the mobile terminal establishes 4G communication with the charging pile after entering the communication mode switching process. Among them, 4G communication and Bluetooth communication are adapted at the protocol layer of the network model, and the communication mode switching process includes: Obtain the current 4G signal strength RSRP value and compare it with the preset 4G threshold Y. If the RSRP value is greater than or equal to Y, switch to 4G communication for charging control; If the RSRP value is less than Y, a guidance prompt will be issued.

2. The Bluetooth and 4G compatible charging method according to claim 1, characterized in that, Establishing Bluetooth communication with the charging station includes: The mobile device sends a reference signal to the charging station. The charging pile transmits a sampling signal back to the mobile terminal based on the received reference signal; After confirming the frequencies of reference signal one and sampling signal one, the mobile device establishes Bluetooth communication with the charging pile.

3. The Bluetooth and 4G compatible charging method according to claim 1, characterized in that, After establishing Bluetooth communication, the charging pile includes: intermittently acquiring RSRP values; The charging pile sends a reference signal 2 via Bluetooth to the mobile terminal; The mobile terminal transmits a sampling signal back to the charging pile based on the received reference signal.

4. The Bluetooth and 4G compatible charging method according to claim 1, characterized in that, The communication method switching process also includes: temporary database mode; The Bluetooth / 4G communication process includes data being transmitted during the communication mode switching process. This data is temporarily stored in a database and retransmitted after the communication mode switching process is completed.

5. The Bluetooth and 4G compatible charging method according to claim 1, characterized in that, The application layer in the network model includes either MQTT or CoAP.

6. The Bluetooth and 4G compatible charging method according to claim 1, characterized in that, It also includes timed charging; The timed charging includes an operation interval and a locking interval; after the locking interval ends, the immediate charging step begins. Among them, after setting the timed charging, the period before time Z is the operation interval, and the period after time Z is the locking interval.

7. A Bluetooth and 4G compatible charging system, characterized in that, include: The Bluetooth communication module is used to prioritize establishing a communication connection between the user and the charging pile, obtain the RSSI value, and compare it with the preset value X. The 4G communication module is used to obtain the RSRP value and compare it with the preset value Y when the Bluetooth signal strength is lower than the X value, to determine whether to switch to 4G communication mode; The central processing unit is used to determine the communication status, switch the communication mode, control the charging process, temporarily store the data being sent, and complete the data retransmission after the communication mode is switched.

8. A charging station compatible with Bluetooth and 4G, characterized in that, The device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor, when executing the computer program, implements the steps of the Bluetooth and 4G compatible charging method as described in any one of claims 1 to 6.

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