Intelligent charging device and charging pile for electric bicycle

Abstract

The application relates to an intelligent charging device and a charging pile for an electric bicycle, which comprises a main control module, a first wireless communication module, a second wireless communication module, a switch control module and a metering module; the main control module is connected with the first wireless communication module, the second wireless communication module, the switch control module and the metering module; the metering module is connected with the switch control module; the main control module is used for receiving a charging request instruction sent by the first wireless communication module or the second wireless communication module, and controlling the switch control module to be turned on to supply power to the electric bicycle; the main control module is also used for controlling the switch control module to be turned off after the electric bicycle is charged according to a charging current, and controlling the switch control module to be turned off when overload is judged according to a charging power, so that the safety of charging is guaranteed.

Description

Technical Field

[0001] This application relates to the field of electric bicycle charging, and in particular to an intelligent charging device and charging station for electric bicycles. Background Technology

[0002] Electric bicycles, as an energy-saving and environmentally friendly personal transportation tool, have seen a significant increase in popularity in both urban and rural areas in recent years. Supporting charging infrastructure is the foundation for this industry's development, undertaking core functions such as centralized power supply, safety management, and user services. With the continuous growth in the number of electric bicycles in society, the market demand for charging stations is expanding rapidly, and various types of charging station products are now widely used in residential communities, commercial areas, and other public places.

[0003] Currently, mainstream electric bicycle charging stations primarily rely on mobile communication networks for user authentication, payment instruction transmission, and remote control. The charging station interacts with a cloud server via a built-in communication module, and users initiate a charging request by scanning the device's QR code with their mobile devices. However, because charging stations are often deployed in areas with weak signal coverage, such as basements, and the communication module's frequency band compatibility is limited, the devices frequently go offline, preventing users from completing the scanning and charging process. In terms of safety, conventional charging stations typically have basic circuit protection devices, passively responding to extreme faults such as short circuits at the hardware level. However, they lack real-time monitoring and comprehensive protection mechanisms for risks such as battery overcharging and power overload, which can easily lead to battery life degradation and even electrical fire hazards. Utility Model Content

[0004] Therefore, it is necessary to provide an intelligent charging device and charging pile for electric bicycles that has multiple protection mechanisms and reliable communication capabilities even in weak signal environments.

[0005] In a first aspect, this application provides an intelligent charging device for electric bicycles, comprising:

[0006] The system comprises a main control module, a first wireless communication module, a second wireless communication module, a switch control module, and a metering module; the main control module is connected to the first wireless communication module, the second wireless communication module, the switch control module, and the metering module, and the metering module is connected to the switch control module.

[0007] The main control module is used to receive a charging request command sent by the first wireless communication module or the second wireless communication module, and control the switch control module to turn on to supply power to the electric bicycle.

[0008] The main control module is also used to receive the charging current and charging voltage collected by the metering module, calculate the charging power based on the charging current and charging voltage, determine the end of charging of the electric bicycle based on the charging current and control the switch control module to disconnect, and determine the overload based on the charging power and control the switch control module to disconnect.

[0009] In one embodiment, the metering module includes: a metering chip, a current acquisition circuit, and a voltage acquisition circuit;

[0010] The current acquisition circuit is used to sample the charging current;

[0011] The voltage acquisition circuit is used to sample the charging voltage;

[0012] The metering core is connected to the current acquisition circuit and the voltage acquisition circuit, and is used to read and store the charging current sampled by the current acquisition circuit and the charging voltage signal sampled by the voltage acquisition circuit.

[0013] In one embodiment, the current acquisition circuit includes: resistor R62, a first filter circuit, and a second filter circuit;

[0014] One end of the resistor R62 is connected to the mains power line L_IN, and the other end is connected to the switch control module;

[0015] The first filter circuit includes a resistor R57 and a capacitor C58. One end of the resistor R57 is connected to the switch control module, and the other end is connected to the first current input pin of the metering chip. One end of the capacitor C58 is connected to the first current input pin of the metering chip, and the other end is connected to analog ground.

[0016] The second filter circuit includes a resistor R67 and a capacitor C68. One end of the resistor R67 is connected to the mains power line L_IN, and the other end is connected to the second current input pin of the metering chip. One end of the capacitor C68 is connected to the second current input pin of the metering chip, and the other end is connected to analog ground.

[0017] In one embodiment, the voltage acquisition circuit includes: resistor R92, resistor R98, and capacitor C93;

[0018] One end of resistor R92 is connected to the mains power line L_IN, and the other end is connected to the voltage input pin of the metering chip; one end of capacitor C93 is connected to the voltage input pin of the metering chip, and the other end is connected to analog ground; one end of resistor R98 is connected to the voltage input pin of the metering chip, and the other end is connected to analog ground, and is connected in parallel with capacitor C93.

[0019] In one embodiment, the metering module further includes: a first isolation output circuit, a second isolation output circuit, and an isolation input circuit; the first isolation output circuit is connected between the main control module and the zero-crossing indicator pin of the metering chip, the second isolation output circuit is connected between the main control module and the serial communication output pin of the metering chip, and the isolation input circuit is connected between the main control module and the serial communication input pin of the metering chip.

[0020] The first isolation output circuit is used to perform zero-crossing detection through the zero-crossing indication signal emitted by the zero-crossing indicator pin, and transmit the detection result to the main control module through optocoupler isolation;

[0021] The second isolation output circuit is used to transmit the charging voltage and charging current signals collected by the metering chip to the main control module;

[0022] The isolated input circuit is used to transmit the control signals of the main control module to the metering chip.

[0023] In one embodiment, the switch control module includes: a relay, a transistor QE1, a diode D1, a resistor R16, a resistor R22, and a capacitor C18;

[0024] The relay's contact portion has one end connected to the mains power line L_IN and the other end connected to the live wire of the charging socket. The relay's coil portion has one end connected to the +12V power supply and the other end connected to the collector of the transistor. The emitter of the transistor QE1 is grounded, and its base is connected to the resistor R16. One end of the resistor R16 is connected to the base of the transistor QE1, and the other end is connected to the switch control pin of the main control module. One end of the capacitor C18 is connected to the base of the transistor QE1, and the other end is grounded. One end of the resistor R22 is connected to the base of the transistor QE1, and the other end is grounded.

[0025] In one embodiment, the first wireless communication module is a 4G module, and the second wireless communication module is a Bluetooth module;

[0026] The 4G module is used to communicate with the cloud server via 4G signal, receive charging request instructions issued by the cloud server, and forward the charging request instructions to the main control module;

[0027] The Bluetooth module is used to receive a charging request command sent by the user on the mobile client via Bluetooth signal when the 4G module is unavailable, and forward the charging request command to the main control module.

[0028] In one embodiment, the intelligent charging device for electric bicycles provided in this application further includes a temperature sampling circuit, which is connected to the main control module and is used to detect the ambient temperature data of the charging device.

[0029] When the main control module determines that the ambient temperature data is higher than a preset threshold, it controls the switch control module to disconnect.

[0030] In one embodiment, the intelligent charging device 9 for electric bicycles provided in this application further includes a voice prompt module, the voice prompt module including: a voice chip and a speaker, the voice chip being connected to the main control module, and the speaker being connected to the voice chip;

[0031] The voice chip is used to receive voice commands sent by the main control module and output electrical signals to drive the speaker to execute the commands;

[0032] The speaker is used to convert the electrical signals output by the voice chip into sound.

[0033] Secondly, this application also provides an intelligent charging station for electric bicycles, including a charging station body and an intelligent charging device for electric bicycles as described in any of the above embodiments.

[0034] The aforementioned intelligent charging device and charging pile for electric bicycles, through the implementation of a dual-mode communication architecture consisting of a first wireless communication module and a second wireless communication module, enables the backup communication module to maintain the transmission of charging commands even when the main communication module's signal is offline, thus achieving reliable charging control in weak signal environments. By collecting charging current and voltage and monitoring charging power through a metering module, automatic charging stop protection and overload protection are implemented, effectively avoiding electrical risks. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 An intelligent charging device for an electric bicycle is provided as an example.

[0037] Figure 2 One embodiment of the metering module is a module structure;

[0038] Figure 3 Another module structure for the metering module in one embodiment;

[0039] Figure 4 The module structure of a switch control module is shown in one embodiment;

[0040] Figure 5 The module structure of a temperature sampling circuit is shown in one embodiment;

[0041] Figure 6 The module structure of a voice prompt module is shown in one embodiment.

[0042] Explanation of reference numerals in the attached figures:

[0043] 100. Main control module; 200. First wireless communication module; 300. Second wireless communication module; 400. Switch control module; 500. Metering module;

[0044] 510 Current acquisition circuit; 520 Voltage acquisition circuit; 530 First isolation output circuit; 540 Second isolation output circuit; 550 Isolation input circuit;

[0045] 600. Temperature sampling circuit;

[0046] 700. Voice prompt module; 710. Voice chip; 720. Speaker. Detailed Implementation

[0047] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0049] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0050] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0051] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0052] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0053] like Figure 1 As shown, an embodiment of an intelligent charging device for an electric bicycle includes a main control module 100, a first wireless communication module 200, a second wireless communication module 300, a switch control module 400, and a metering module 500. The main control module 100 is connected to the first wireless communication module 200, the second wireless communication module 300, the switch control module 400, and the metering module 500. The metering module 500 is connected to the switch control module 400, and the switch control module 400 controls the on / off state of the circuit between the 220V AC mains input and output sockets.

[0054] The main control module 100 receives charging request commands from the first wireless communication module 200 or the second wireless communication module 300, and controls the switch control module 400 to turn on to supply power to the electric bicycle. Since electric bicycle charging stations are typically installed in basements, where network signal coverage is limited, many charging stations, to reduce costs, only support certain standards and frequency bands from a single operator, resulting in frequent signal loss in basements. Therefore, when a user sends a charging request to the charging station via QR code scanning or other methods, the charging station first uses the first wireless communication module 200 to receive the request and communicates with the cloud to verify the user's identity and payment status. After successful verification, the first wireless communication module 200 sends the verified information to the main control module 100, which then controls the switch control module 400 to turn on and charge the electric bicycle.

[0055] When the network of the first wireless communication module 200 is unavailable, since the user's smart device typically supports multiple network standards and frequency bands, the charging pile communicates and pairs with the user's smartphone through the second wireless communication module 300. The user's mobile device client sends a charging request to the cloud server, which verifies the user's identity and payment status. After successful verification, the user's client establishes a connection with the charging pile's main control module 100. The cloud server transmits instructions to the user's client, which then transmits the instructions to the charging pile's main control module 100 via the second communication module 300. The main control module 100 then controls the switch control module 400 to turn on, charging the electric bicycle.

[0056] In addition, the main control module 100 is also used to receive the charging current collected by the metering module 500. It is worth noting that if the electric bicycle battery continues to be charged after it has finished charging, it will not only affect the battery's range and lifespan but may also pose a safety hazard. When the battery is fully charged, the current becomes relatively low. Therefore, the charging self-stop function can be implemented by detecting the current in the charging circuit. When the current value is less than the set full-charge self-stop threshold, the main control module 100 will control the electric bicycle to continue floating-charging for a period of time before stopping charging, thus providing a full-charge self-stop protection function. Specifically, the main control module 100 receives the real-time charging current value uploaded by the metering module 500. When it detects that the current value is continuously lower than the preset floating-charging threshold and reaches a preset time (e.g., 10 minutes), it determines that the battery is fully charged and sends a disconnect command to the switch control module 400. Automatic power-off is achieved through floating-charge current identification, avoiding battery capacity degradation caused by overcharging.

[0057] Meanwhile, the main control module 100 also receives the real-time charging voltage value uploaded by the metering module 500 and calculates the charging power based on the charging current and charging voltage. If the charging power is higher than the preset power threshold, overload protection is triggered, and a disconnect command is sent to the switch control module 400 to achieve the power overload protection function.

[0058] In one exemplary embodiment, such as Figure 2 As shown, the metering module 500 includes a metering chip U11, a current acquisition circuit 510, and a voltage acquisition circuit 520. The metering chip U11 is connected to both the current acquisition circuit 510 and the voltage acquisition circuit 520.

[0059] The metering chip U11 is used to read and store the charging current sampled in real time by the current acquisition circuit and the charging voltage signal sampled in real time by the voltage acquisition circuit. In a preferred embodiment, the metering chip U11 is a BL0939 calibration-free metering chip. The BL0939 is a calibration-free energy metering chip with a built-in clock, capable of measuring parameters such as current and voltage RMS values, and supporting functions such as temperature detection and UART / SPI interface input / output. Pin 1 (VDD) of the chip is connected to a 3.3V power supply, and pin 8 (GND) is connected to the chip ground; pins 3 (IP1), 4 (IN1), 5 (IP2), and 6 (IN2) are the analog inputs for current channels A and B, respectively; pin 7 (VP) is the positive input terminal for the voltage signal; pin 13 (ZX) outputs a zero-crossing voltage indicator; pin 18 (RX_SDI) is a UART / SPI multiplexed input pin; and pin 19 (TX_SDO) is a UART / SPI multiplexed output pin, requiring an external pull-up resistor.

[0060] In an exemplary embodiment, pin 3 of the metering chip U11 serves as the first current input pin, and pin 4 serves as the second current input pin, connected to the current acquisition circuit. The current acquisition circuit includes a resistor R62, a first filter circuit, and a second filter circuit. One end of resistor R62 is connected to the mains power line L_IN, and the other end is connected to the switch control module. The first filter circuit includes a resistor R57 and a capacitor C58, wherein one end of resistor R57 is connected to the switch control module, and the other end is connected to pin 3 of the metering chip U11; one end of capacitor C58 is connected to pin 3, and the other end is connected to analog ground. The second filter circuit includes a resistor R67 and a capacitor C68, wherein one end of resistor R67 is connected to the mains power line L_IN, and the other end is connected to pin 4 of the metering chip U11; one end of capacitor C68 is connected to pin 4 of the metering chip U11, and the other end is connected to analog ground.

[0061] In the current acquisition circuit of the above embodiment, the current flowing through the sampling resistor can be calculated by sampling the differential voltage between pin 3 and pin 4 of the metering chip U11. That is, the metering chip can obtain the current value of the branch through the voltage difference across the sampling resistor and further realize the charging self-stop function.

[0062] In another exemplary embodiment, the metering chip U11 is connected to the voltage acquisition circuit via pins 7 and 8. The voltage acquisition circuit includes resistors R92 and R98, and capacitor C93. One end of resistor R92 is connected to the mains live wire L_IN, and the other end is connected to pin 7; one end of capacitor C93 is connected to pin 7, and the other end is connected to analog ground; one end of resistor R98 is connected to pin 7, and the other end is connected to analog ground, and it is connected in parallel with capacitor C93.

[0063] In the voltage acquisition circuit of the above embodiment, pin 7 of the metering chip U11 serves as the positive input terminal of the voltage signal. Resistors R92 and R98 form a voltage divider circuit to reduce the voltage of the mains live wire to the millivolt level. After being filtered by capacitor C93, the voltage is supplied to the metering chip for processing. The metering chip U11 can calculate the voltage of the circuit based on the voltage division ratio. By acquiring the real-time voltage, it is convenient to calculate parameters such as active power, reactive power, and power factor, and to implement an overload protection mechanism.

[0064] Furthermore, in order to calculate parameters such as active power, reactive power, and power factor, such as... Figure 3 As shown, in an exemplary embodiment, the metering module 500 further includes a first isolation output circuit 530, a second isolation output circuit 540, and an isolation input circuit 550. The first isolation output circuit is connected between the main control module 100 and pin 13 (ZX) of the metering chip U11; the second isolation output circuit is connected between the main control module 100 and pin 19 (TX_SDO) of the metering chip U11; and the isolation input circuit is connected between the main control module 100 and pin 18 (RX_SDI) of the metering chip.

[0065] Specifically, the first isolation output circuit includes an optocoupler isolation module U2, resistor R93, and resistor R117. The optocoupler isolation module U2 includes an input-side LED and an output-side transistor. The input-side LED converts the electrical signal from the high-voltage side into an optical signal, which is transmitted through an internal insulating barrier. The output-side transistor then converts the optical signal back into an electrical signal. Pin 1 of U2 is connected to VDD. Pin 2 of U2 is connected to pin 13 of the metering chip U11 via resistor R93. Pin 3 of U2 is connected to system ground. Pin 4 of U2 is connected to the I / O port MCU_ZX of the main control module 100. Pin 4 of U2 is also connected to VCC via resistor R117.

[0066] It is understood that the aforementioned first isolation output circuit performs zero-crossing detection through the zero-crossing indication signal ZX emitted by the metering chip U11. When the zero-crossing indication signal ZX is zero, it indicates the positive half-cycle of the waveform; when ZX is 1, it indicates the negative half-cycle. To ensure safe isolation between the high-voltage side metering section and the low-voltage side main control section, the zero-crossing indication signal ZX of the metering chip U11 is transmitted in the first isolation output circuit using optocoupler isolation. When the ZX signal is 1, the LED on the input side of U2 does not light up, the transistor on the output side of U2 is cut off, and since the MCU_ZX of the main control module 100 is pulled up to VCC, MCU_ZX is also at a high level at this time. When ZX is 0, the LED on the input side of the optocoupler isolation module U2 is turned on, the transistor on the output side of U2 is saturated and turned on, and MCU_ZX is connected to pin 3 ground of U3, so MCU_ZX is at a low level. In this way, the zero-crossing detection identifies the zero-crossing point of the AC voltage waveform and transmits it to the main control module 100. The main control module 100 compares the time difference between the voltage zero-crossing point and the current zero-crossing point to calculate the voltage-current phase angle, which can then be used to measure the phase relationship between voltage and current.

[0067] Additionally, the second isolated output circuit includes an optocoupler isolation module U1, resistors R94 and R95. U1 includes an input-side LED and an output-side transistor, similar to the first isolated output circuit, and will not be described in detail here. Pin 1 of U1 is connected to VDD via resistor R94, pin 2 of U1 is connected to the serial port transmit pin 19 (TX_SDO) of the metering chip U11, pin 3 is connected to system ground, and pin 4 is connected to the serial port receive pin BL0939_RX of the main control module 100, and connected to VCC via resistor R95. When the metering chip U11 transmits the signal TX_SDO as 1, the input-side LED of U1 does not emit light, the output-side transistor of U1 is cut off, and since the receive pin BL0939_RX of the main control module 100 is pulled up to VCC, BL0939_RX is also at a high level at this time. When TX_SDO is 0, the LED on the input side of optocoupler U1 is turned on and illuminated, and the transistor on the output side of U1 is saturated and turned on. At this time, BL0939_RX is connected to ground at pin 3 of U1, so the receiving pin BL0939_RX of the main control module 100 is at a low level.

[0068] Through the above process, the second isolated output circuit can transmit parameters such as charging voltage and charging current values ​​collected by the metering chip U11 to the main control module 100 via optocoupler isolation from the serial interface. The main control module 100 combines the phase relationship of voltage and current obtained by the first isolated output circuit to calculate parameters such as active power, reactive power, and power factor. Since this device can acquire the power of each output, when the total power exceeds the preset total power overload threshold, the main control module 100 automatically disconnects the last connected output to achieve the device's own total power overload protection. At the same time, if the power of a certain output exceeds the single-output power overload threshold, the main control module 100 will also automatically disconnect the output of that output to achieve single-output overload protection.

[0069] Similarly, the isolation input circuit includes an optocoupler isolation module U3, resistors R106 and R117. Pin 1 of U3 is connected to VCC via resistor R106, pin 2 of U3 is connected to the serial port transmit pin BL0939_TX of the main control module 100, pin 3 of U3 is connected to analog ground, and pin 4 is connected to the serial port receive pin 18 (RX_SDI) of the metering chip. When the serial port transmit pin BL0939_TX of the main control module 100 is 1, the LED on the input side of the optocoupler U3 does not light up, the transistor on the output side of U3 is cut off, and since the serial port receive pin RX_SDI of the metering chip is pulled up to VDD, RX_SDI is also high at this time. When BL0939_TX is 0, the LED on the input side of the optocoupler U3 is turned on and illuminates, the transistor on the output side of U3 is saturated and turned on, RX_SDI is connected to the analog ground at pin 3 of U3, and RX_SDI is low. Through the above process, the metering chip U11 receives the control commands issued by the main control module 100 through optical coupling isolation.

[0070] In the above embodiments, optocoupler isolation is used to achieve electrical isolation between the high-voltage metering circuit and the low-voltage main control module, as well as lossless signal transmission. Simultaneously, the logic level of the zero-crossing detection signal is transmitted synchronously, and the detection result is transmitted to the main control module via optocoupler isolation. Overload protection is implemented by judging the power in the circuit, preventing equipment damage, electrical fires, and other risks caused by current or power exceeding design limits.

[0071] In another exemplary embodiment, such as Figure 4 As shown, the switch control module 400 includes a relay, a transistor QE1, a diode D1, a resistor R16, a resistor R22, and a capacitor C18.

[0072] The relay's contact portion has one end connected to the mains power line L_IN and the other end connected to the live wire of the charging socket. The relay's coil portion has one end connected to the +12V power supply and the other end connected to the collector of transistor QE1. The emitter of transistor QE1 is grounded, and its base is connected to resistor R16. One end of resistor R16 is connected to the base of transistor QE1, and the other end is connected to the switch control pin K1 of the main control module. One end of capacitor C18 is connected to the base of transistor QE1, and the other end is grounded. One end of resistor R22 is connected to the base of transistor QE1, and the other end is grounded.

[0073] Specifically, when the main control module 100 sends a command to supply 220V AC mains power to this output, it will pull the K1 signal high, meaning the voltage at the K1 pin will be 3.3V. After voltage division by resistors R16 and R22, the base voltage of transistor QE1 will then be... Because the emitter of transistor QE1 is grounded, Vbe is greater than the transistor's conduction threshold, so transistor QE1 is in the conducting state. The collector of transistor QE1 is connected to ground, which means that pin 4 of the relay coil is connected to ground. At this time, the relay coil generates a magnetic field after being energized. Attracted by the magnetic field, the relay contacts close, and the live wire of this output socket is connected to the mains live wire. This output socket successfully outputs 220V mains power to charge the electric bicycle.

[0074] In one example embodiment, the first wireless communication module 200 is a 4G module, and the second wireless communication module 300 is a Bluetooth module. The 4G module is used to communicate with the cloud server via 4G signals, receive charging request instructions from the cloud server, and forward the charging request instructions to the main control module; the Bluetooth module is used to receive charging request instructions sent by the user on the mobile client via Bluetooth signals when the 4G module is unavailable, and forward the charging request instructions to the main control module.

[0075] Specifically, when the 4G module is unavailable, the process of charging electric bicycles via Bluetooth QR code scanning is as follows: The user uses a smartphone or other mobile device to scan the QR code on the charging station to obtain the charging station ID and Bluetooth pairing information. The user's mobile client sends a charging request to the cloud server. The cloud server verifies the user's identity and payment status. After successful verification, the user's mobile client establishes a connection with the charging station's main control module. The cloud server sends encrypted commands to the mobile client via the 4G network. The mobile client then transmits the commands to the charging station's main control module via Bluetooth. After verifying the commands, the main control module activates the relay in the control circuit. At this point, the socket has 220V AC power, and the user can complete the Bluetooth QR code charging process.

[0076] Furthermore, when a user sends a charging request, they also select the desired charging duration. After verification by the cloud, the purchased duration is also sent to the user. Upon receiving this information, the charging device will close the charging port and end the charging process once the allotted time has elapsed.

[0077] In the above embodiments, the 4G module and the Bluetooth module work together to form a dual communication guarantee, ensuring that the charging request command can be stably transmitted to the main control module, improving communication reliability and ensuring the effective reception of the charging command.

[0078] In other embodiments, such as Figure 5 As shown, the intelligent charging device for electric vehicles in this application also includes a temperature sampling circuit 600, which is connected to the main control module 100 and is used to detect the ambient temperature data of the charging device. When the main control module determines that the ambient temperature data is higher than a preset threshold, it controls the switch to disconnect.

[0079] Specifically, the temperature sampling circuit 600 includes a temperature sensor, which can be installed near a high-heat area on the motherboard of the charging device to monitor the temperature rise of the motherboard during high-current transmission. After the temperature sensor transmits the collected temperature signal to the main control module 100, the main control module 100 controls whether to continue charging based on the temperature. When the temperature exceeds a preset safety threshold, the control switch disconnects the circuit, thus providing over-temperature protection.

[0080] In other embodiments, such as Figure 6 As shown, the intelligent charging device for electric vehicles of this application also includes a voice prompt module 700, which specifically includes a voice chip 710 and a speaker 720. The voice chip 710 is connected to the main control module 100, and the speaker 720 is connected to the voice chip 710.

[0081] Specifically, the voice chip 710 pre-stores multiple voice codes. When it receives a voice command from the main control module, the voice chip 710 outputs an electrical signal to drive the speaker 720 to execute the command. The speaker converts the electrical signal output by the voice chip into sound. Specific prompts include, but are not limited to, messages indicating successful QR code scanning, charging start, and charging completion.

[0082] In some other embodiments, the intelligent charging device for electric vehicles of this application is also equipped with an air switch on the mains input bus. The air switch has the characteristic of extremely fast response time. When a short circuit event occurs, the current on the input bus is large, and the air switch will quickly respond to cut off the fault current to protect the circuit and equipment safety.

[0083] This utility model also provides a smart charging station for electric bicycles, including a charging station body and at least one of the smart charging devices for electric bicycles described in the above embodiments. The charging station body includes a charging device housing, and the smart charging device for electric bicycles is installed inside the housing of the charging station body.

[0084] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0085] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. An intelligent charging device for electric bicycles, characterized in that, include: The system comprises a main control module, a first wireless communication module, a second wireless communication module, a switch control module, and a metering module; the main control module is connected to the first wireless communication module, the second wireless communication module, the switch control module, and the metering module, and the metering module is connected to the switch control module. The main control module is used to receive a charging request command sent by the first wireless communication module or the second wireless communication module, and control the switch control module to turn on to supply power to the electric bicycle. The main control module is also used to receive the charging current and charging voltage collected by the metering module, calculate the charging power based on the charging current and charging voltage, determine the end of charging of the electric bicycle based on the charging current and control the switch control module to disconnect, and determine the overload based on the charging power and control the switch control module to disconnect.

2. The intelligent charging device for electric bicycles according to claim 1, characterized in that, The metering module includes: a metering chip, a current acquisition circuit, and a voltage acquisition circuit; The current acquisition circuit is used to sample the charging current; The voltage acquisition circuit is used to sample the charging voltage; The metering core is connected to the current acquisition circuit and the voltage acquisition circuit, and is used to read and store the charging current sampled by the current acquisition circuit and the charging voltage signal sampled by the voltage acquisition circuit.

3. The intelligent charging device for electric bicycles according to claim 2, characterized in that, The current acquisition circuit includes: resistor R62, a first filter circuit, and a second filter circuit; One end of the resistor R62 is connected to the mains power line L_IN, and the other end is connected to the switch control module; The first filter circuit includes a resistor R57 and a capacitor C58. One end of the resistor R57 is connected to the switch control module, and the other end is connected to the first current input pin of the metering chip. One end of the capacitor C58 is connected to the first current input pin of the metering chip, and the other end is connected to analog ground. The second filter circuit includes a resistor R67 and a capacitor C68. One end of the resistor R67 is connected to the mains power line L_IN, and the other end is connected to the second current input pin of the metering chip. One end of the capacitor C68 is connected to the second current input pin of the metering chip, and the other end is connected to analog ground.

4. The intelligent charging device for electric bicycles according to claim 2, characterized in that, The voltage acquisition circuit includes: resistor R92, resistor R98, and capacitor C93; One end of resistor R92 is connected to the mains power line L_IN, and the other end is connected to the voltage input pin of the metering chip; one end of capacitor C93 is connected to the voltage input pin of the metering chip, and the other end is connected to analog ground; one end of resistor R98 is connected to the voltage input pin of the metering chip, and the other end is connected to analog ground, and is connected in parallel with capacitor C93.

5. The intelligent charging device for electric bicycles according to claim 2, characterized in that, The metering module further includes: a first isolation output circuit, a second isolation output circuit, and an isolation input circuit; the first isolation output circuit is connected between the main control module and the zero-crossing indicator pin of the metering chip, the second isolation output circuit is connected between the main control module and the serial communication output pin of the metering chip, and the isolation input circuit is connected between the main control module and the serial communication input pin of the metering chip. The first isolation output circuit is used to perform zero-crossing detection through the zero-crossing indication signal emitted by the zero-crossing indicator pin, and transmit the detection result to the main control module through optocoupler isolation; The second isolation output circuit is used to transmit the charging voltage and charging current signals collected by the metering chip to the main control module; The isolated input circuit is used to transmit the control signals of the main control module to the metering chip.

6. The intelligent charging device for electric bicycles according to claim 1, characterized in that, The switch control module includes: a relay, a transistor QE1, a diode D1, a resistor R16, a resistor R22, and a capacitor C18; The relay's contact portion has one end connected to the mains power line L_IN and the other end connected to the live wire of the charging socket. The relay's coil portion has one end connected to the +12V power supply and the other end connected to the collector of the transistor. The emitter of the transistor QE1 is grounded, and its base is connected to the resistor R16. One end of the resistor R16 is connected to the base of the transistor QE1, and the other end is connected to the switch control pin of the main control module. One end of the capacitor C18 is connected to the base of the transistor QE1, and the other end is grounded. One end of the resistor R22 is connected to the base of the transistor QE1, and the other end is grounded.

7. The intelligent charging device for electric bicycles according to claim 1, characterized in that, The first wireless communication module is a 4G module, and the second wireless communication module is a Bluetooth module; The 4G module is used to communicate with the cloud server via 4G signal, receive charging request instructions issued by the cloud server, and forward the charging request instructions to the main control module; The Bluetooth module is used to receive a charging request command sent by the user on the mobile client via Bluetooth signal when the 4G module is unavailable, and forward the charging request command to the main control module.

8. The intelligent charging device for electric bicycles according to claim 1, characterized in that, It also includes a temperature sampling circuit, which is connected to the main control module and is used to detect the ambient temperature data of the charging device; When the main control module determines that the ambient temperature data is higher than a preset threshold, it controls the switch control module to disconnect.

9. The intelligent charging device for electric bicycles according to claim 1, characterized in that, It also includes a voice prompt module, which comprises a voice chip and a speaker, wherein the voice chip is connected to the main control module and the speaker is connected to the voice chip; The voice chip is used to receive voice commands sent by the main control module and output electrical signals to drive the speaker to execute the commands; The speaker is used to convert the electrical signals output by the voice chip into sound.

10. A smart charging station for electric bicycles, characterized in that, It includes the charging pile body and the intelligent charging device for the electric bicycle as described in any one of claims 1-9.

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