New energy automobile charging lock avoiding circuit

Abstract

The invention relates to a new energy automobile charging lock-avoiding circuit in the technical field of charging guns, and the new energy automobile charging lock-avoiding circuit comprises an MCU main control chip, a battery management module, a CAN communication module, a 4G communication module and an energy storage battery, and further comprises a control module, the control module comprises a touch switch and an LED module, the touch switch and the LED module are electrically connected with the MCU main control chip, and the MCU main control chip is electrically connected with the battery management module. The MCU main control chip can obtain external and internal battery information through the CAN module, the power supply, the CAN transceiver and the ADC, meanwhile, BMS communication with the outside is carried out, finally, the GPS module is opened to send information, then the charging gun locking device continues to sleep, and the function of information interaction of the charging gun locking device is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of charging guns, and in particular to a charging lock-avoiding circuit for new energy vehicles. Background Art

[0002] Charging piles are key equipment to ensure the normal operation of electric vehicles and other machines that use batteries as driving energy. They can be fixed on the ground or wall and installed in residential parking lots, charging stations, public parking lots and other places to provide charging for electric vehicles.

[0003] Currently, the commonly used charging facilities are mainly large charging stations, outdoor charging piles, community charging piles and public parking lot charging piles. The focus of the energy connection between charging piles and new energy vehicles lies in the charging gun.

[0004] Existing charging guns only have electrical connection and interface locking functions, while the charging information and location information of new energy vehicles are uploaded to the charging platform through the charging pile, without any information exchange function. Therefore, in response to these current situations, it is urgent to develop a new energy vehicle charging lock avoidance circuit to meet practical needs. Summary of the Invention

[0005] The purpose of the present invention is to provide a new energy vehicle charging lock avoidance circuit to solve the above-mentioned defects.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: A new energy vehicle charging lock avoidance circuit includes an MCU main control chip, a battery management module, a CAN communication module, a 4G communication module and an energy storage battery. The 4G communication module includes several groups of wake-up switch circuits and communication pins. The communication pins are electrically connected to the MCU main control chip through several groups of wake-up switch circuits. The MCU main control chip is also provided with a crystal oscillator circuit. The crystal oscillator circuit provides a clock signal for the MCU main control chip. The battery management module includes a battery management chip, a voltage stabilizing module and a charging port. The charging port and the energy storage battery are both electrically connected to the battery management chip, and the energy storage battery is powered by the MCU main control chip through the voltage stabilizing module. The CAN communication module includes a CAN transceiver, a CAN isolated power supply and a boost module. The CAN transceiver is powered by the CAN isolated power supply. The MCU main control chip is electrically connected to the CAN transceiver through the boost module. The CAN transceiver communicates CAN signals with the MCU main control chip.

[0007] In the above description, as a further solution, the voltage stabilization module is composed of a linear voltage regulator, and the battery management chip is connected to the linear voltage regulator through a battery voltage stabilization output circuit.

[0008] In the above description, as a further solution, a voltage measurement circuit is provided in the middle of the battery voltage stabilization output circuit, and the MCU main control chip is electrically connected to the battery voltage stabilization output circuit through the voltage measurement circuit.

[0009] In the above description, as a further solution, the crystal oscillator circuit includes a high-frequency crystal oscillator circuit and a low-frequency crystal oscillator circuit, which respectively provide a 32kHz clock signal and an 8MHz clock signal for the MCU main control chip.

[0010] In the above description, as a further solution, the boost module includes a boost chip and a boost circuit. The boost chip is composed of a boost current mode PWM converter. The MCU main control chip provides a boost circuit and a boost current mode PWM converter to output a low-level digital signal.

[0011] In the above description, as a further solution, a CAN isolation circuit is provided between the boost chip, the CAN isolation power supply and the CAN transceiver, and the boost chip electrically connects the CAN signal through the CAN isolation power supply and the CAN transceiver through the CAN isolation circuit.

[0012] In the above description, as a further solution, a control module is also included, and the control module includes a touch switch and an LED module, and the touch switch and the LED module are both electrically connected to the MCU main control chip.

[0013] Compared with the existing technology, the beneficial effects of the present invention are as follows: the circuit board is externally connected to the touch button through a touch switch. When there is no key signal input, the entire circuit is in an extremely low-power sleep state, and the GPS module is turned on once an hour to send location information to the server; when there is a key signal input, the main control sends a signal to the RGB light to turn it red and the buzzer sounds, and then the MCU main control chip turns on the CAN module, power supply, CAN transceiver and ADC, obtains external and internal battery information while communicating with the external BMS, and finally turns on the GPS module to send information and continues to sleep, realizing the function of information interaction of the charging gun lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of a new energy vehicle charging lock avoidance circuit according to this embodiment; Figure 2 Schematic diagram of the structure of the voltage measurement circuit in this embodiment; Figure 3 This is a schematic diagram of the structure of the MCU main control chip described in this embodiment; Figure 4 Schematic diagram of the structure of the control module in this embodiment; Figure 5 Schematic diagram of the structure of the 4G communication module in this embodiment; Figure 6 Schematic diagram of the structure of the crystal oscillator circuit in this embodiment; Figure 7 Schematic diagram of the structure of the battery management module in this embodiment; Figure 8 Schematic diagram of the structure of the CAN communication module described in this embodiment. DETAILED DESCRIPTION

[0015] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0016] For this example, please refer to Figures 1-8 The specifically implemented new energy vehicle charging lock avoidance circuit includes an MCU main control chip, a battery management module, a CAN communication module, a 4G communication module and an energy storage battery, and also includes a control module. The control module includes a touch switch and an LED module. The touch switch and the LED module are both electrically connected to the MCU main control chip.

[0017] The 4G communication module includes several groups of wake-up switch circuits and communication pins. The communication pins are electrically connected to the MCU main control chip through several groups of wake-up switch circuits, and the MCU main control chip is also provided with a crystal oscillator circuit. The crystal oscillator circuit provides a clock signal for the MCU main control chip. The battery management module includes a battery management chip, a voltage stabilizing module and a charging port. The charging port and the energy storage battery are electrically connected to the battery management chip, and the energy storage battery is powered by the MCU main control chip through the voltage stabilizing module. The CAN communication module includes a CAN transceiver, a CAN isolation power supply and a boost module. The CAN transceiver is powered by the CAN isolation power supply. The MCU main control chip is electrically connected to the CAN transceiver through the boost module. The CAN transceiver performs CAN signal communication with the MCU main control chip.

[0018] Specifically, the voltage stabilization module consists of a linear voltage regulator. The battery management chip is connected to the linear voltage regulator via a battery voltage stabilization output circuit. The linear voltage regulator, consisting of the ME6209A33M3G linear voltage regulator, can provide a maximum output current of 3.3V and 250mA, making it suitable for powering small systems such as microcontrollers. A voltage measurement circuit is located in the middle of the battery voltage stabilization output circuit, and the MCU main control chip is electrically connected to the battery voltage stabilization output circuit through the voltage measurement circuit.

[0019] The crystal oscillator circuit includes a high-frequency crystal oscillator circuit and a low-frequency crystal oscillator circuit. The high-frequency crystal oscillator circuit and the low-frequency crystal oscillator circuit provide 32kHz clock signal and 8MHz clock signal for the MCU main control chip respectively.

[0020] Specifically, the boost module consists of a boost chip and a boost circuit. The boost chip comprises a boost current-mode PWM converter. The MCU provides the boost circuit and the boost current-mode PWM converter outputs a low-level digital signal. The PWM circuit incorporates a built-in 0.180 power MOSFET, making this regulator highly power efficient. The internal compensation network also minimizes the number of external components by up to six. The non-inverting input of the error amplifier is connected to a 0.6V precision reference voltage, and an internal soft-start function reduces inrush current.

[0021] A CAN isolation circuit is provided between the boost chip, the CAN isolation power supply and the CAN transceiver. The boost chip electrically connects the CAN signal to the CAN transceiver via the CAN isolation circuit via the CAN isolation power supply. The preferred CAN isolation power supply is composed of B0505S-1WR3, whose main purpose is to provide isolated power for the CAN bus. The subsequent load is mainly the CAN transceiver. The preferred CAN transceiver is composed of ISO1042BDWVR. The CAN transceiver is isolated and complies with the ISO11898-2 (2016) standard. It supports classic CAN and FD CAN and has ±70V DC bus fault protection.

[0022] The circuit is connected to a touch button externally through a touch switch. When there is no key signal input, the entire circuit is in an extremely low-power sleep state, and the GPS module is turned on once an hour to send location information to the server; when a key signal is input, the main control sends a signal to the RGB light to turn it red and the buzzer sounds, then the MCU main control chip turns on the CAN module, power supply, CAN transceiver and ADC, obtains external and internal battery information while communicating with the external BMS, and finally turns on the GPS module to send information and continue to sleep, realizing the function of information interaction of the charging gun lock.

[0023] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all of these should be considered as the scope of protection of the present invention.

Claims

1. A new energy vehicle charging lock avoidance circuit, characterized by: Including MCU main control chip, battery management module, CAN communication module, 4G communication module and energy storage battery; The 4G communication module includes several sets of wake-up switch circuits and communication pins. The communication pins are electrically connected to the MCU main control chip through the several sets of wake-up switch circuits. The MCU main control chip is also provided with a crystal oscillator circuit, which provides a clock signal for the MCU main control chip. The battery management module includes a battery management chip, a voltage stabilizing module and a charging port. The charging port and the energy storage battery are electrically connected to the battery management chip, and the energy storage battery is powered by the voltage stabilizing module and the MCU main control chip. The CAN communication module includes a CAN transceiver, a CAN isolation power supply and a boost module. The CAN transceiver is powered by the CAN isolation power supply, the MCU main control chip is electrically connected to the CAN transceiver through the boost module, and the CAN transceiver communicates CAN signals with the MCU main control chip.

2. A new energy vehicle charging lock avoidance circuit according to claim 1, characterized in that: The voltage stabilizing module is composed of a linear voltage stabilizer, and the battery management chip is connected to the linear voltage stabilizer through a battery voltage stabilizing output circuit.

3. A new energy vehicle charging lock avoidance circuit according to claim 2, characterized in that: A voltage measuring circuit is provided in the middle of the battery voltage-stabilizing output circuit, and the MCU main control chip is electrically connected to the battery voltage-stabilizing output circuit through the voltage measuring circuit.

4. A new energy vehicle charging lock avoidance circuit according to claim 1, characterized in that: The crystal oscillator circuit includes a high-frequency crystal oscillator circuit and a low-frequency crystal oscillator circuit, and the high-frequency crystal oscillator circuit and the low-frequency crystal oscillator circuit respectively provide a 32kHz clock signal and an 8MHz clock signal for the MCU main control chip.

5. The new energy vehicle charging lock-avoiding circuit according to claim 1, characterized in that: The boost module includes a boost chip and a boost circuit. The boost chip is composed of a boost current mode PWM converter. The MCU main control chip provides a boost circuit and a boost current mode PWM converter to output a low-level digital signal.

6. A new energy vehicle charging lock avoidance circuit according to claim 5, characterized in that: A CAN isolation circuit is provided between the boost chip, the CAN isolation power supply and the CAN transceiver. The boost chip electrically connects the CAN signal to the CAN transceiver via the CAN isolation power supply through the CAN isolation circuit.

7. A new energy vehicle charging lock avoidance circuit according to any one of claims 1 to 6, characterized in that: It also includes a control module, which includes a touch switch and an LED module. The touch switch and the LED module are both electrically connected to the MCU main control chip.

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