A 4G intelligent connected charging control electric vehicle charger

Abstract

This utility model discloses a 4G intelligent connected charging control electric vehicle charger. Its internal circuitry includes a mains power input and rectification / filtering circuit, a flyback converter and transformer circuit, a secondary rectifier circuit, a battery detection and reverse connection protection circuit, a flyback IC control circuit, a dual-channel temperature detection circuit, an intelligent MCU circuit, a one-line communication protocol circuit, a 5V linear regulator circuit, a main control MCU circuit, a 4G communication module circuit, and a 3.3V linear regulator circuit. This 4G intelligent connected charging control electric vehicle charger provides dual communication functions: wireless 4G network communication and wired communication. It also features overvoltage protection, overcurrent protection, short-circuit protection, overtemperature protection, and intelligent charging capabilities. Furthermore, it allows for remote control of the charger, making it more convenient and safer to use, better meeting people's needs.

Description

Technical Field

[0001] This utility model belongs to the field of power charger technology, specifically relating to an electric vehicle charger with 4G intelligent connection control charging. Background Technology

[0002] Chargers for electric bicycles or electric motorcycles are generally quite simple. Observing the charging status and stopping charging can only be done by being near the charger, and they cannot be operated remotely. Since charging electric bicycles or electric motorcycles takes a long time and the charging location is often some distance from people's residences, the inability to operate remotely is very inconvenient and can lead to safety hazards due to the inability to stop charging in time. Therefore, designing a remotely operable electric vehicle charger can better meet people's needs. Utility Model Content

[0003] The purpose of this invention is to address the above-mentioned problems by providing a 4G intelligent connected charging electric vehicle charger, which incorporates a 4G communication module to enable remote control of the electric vehicle charger and better meet people's usage needs.

[0004] This utility model is achieved through the following technical solution:

[0005] A 4G intelligent connected charging electric vehicle charger is characterized by the following internal circuitry: a mains power input and rectification filter circuit, a flyback converter and transformer circuit, a secondary rectifier circuit, a battery detection and reverse connection protection circuit, a flyback IC control circuit, a dual-channel temperature detection circuit, an intelligent MCU circuit, a one-line communication protocol circuit, a 5V linear regulator circuit, a main control MCU control circuit, a 4G communication module circuit, and a 3.3V linear regulator circuit.

[0006] The mains input and rectification filtering circuit sequentially passes through the flyback converter and transformer circuit, and the secondary rectification circuit to form a charging output in the battery detection and reverse connection protection circuit. The flyback IC control circuit controls the output of the flyback converter and transformer circuit. The dual-channel temperature detection circuit includes two thermistors RT3 and RT4, and outputs corresponding control signals NTC3 and NTC4. The intelligent MCU circuit includes a main control chip U2, model CMS8S6990. The input terminal of chip U2 receives current and voltage sampling data collected from the battery detection and reverse connection protection circuit, control signals transmitted from the one-line communication protocol circuit, and control signals introduced from the dual-channel temperature detection circuit. The output of the battery detection and reverse connection protection circuit is controlled; the 5V linear regulator circuit converts the other secondary output of the transformer in the flyback converter and transformer circuit into a +5V voltage output to supply the intelligent MCU circuit; the 4G communication module circuit includes a chip U3 of model EC800K, and the main control MCU circuit includes a chip U8 of model AT32F403ACGT7. The 4G communication module circuit transmits control signals to the intelligent MCU circuit through the main control MCU circuit; the 3.3V linear regulator circuit draws from the 5V linear regulator circuit and converts it into a +3.3V voltage output to supply the main control MCU circuit and the 4G communication module circuit.

[0007] Furthermore, the mains input and rectification filter circuit includes a fuse F1, a varistor ZR1, and a thermistor RT1.

[0008] Furthermore, the flyback IC control circuit includes a control chip U1, model OB5282.

[0009] Furthermore, a cooling fan is connected to the 5V linear voltage regulator circuit, and the start and stop status of the fan is controlled by the intelligent MCU circuit 7.

[0010] Furthermore, the intelligent MCU circuit is equipped with a charging status indicator light.

[0011] Furthermore, the 4G communication module circuit is equipped with a chip U3 working status indicator and a network status indicator.

[0012] The beneficial effects of this utility model are as follows: The electric vehicle charger with 4G intelligent connection control of this utility model is designed with an intelligent MCU circuit, a one-line communication protocol circuit, a main control MCU control circuit and a 4G communication module circuit, which enables the charger to have dual communication functions of wireless 4G network communication and wired communication. It also enables the charger to have overvoltage protection, overcurrent protection, short circuit protection, overtemperature protection and intelligent charging functions. At the same time, it can also remotely control the charger, making it more convenient and safer to use, and better meeting people's usage needs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the principle of this utility model.

[0014] Figure 2 This is the circuit schematic diagram of the first part of this utility model.

[0015] Figure 3 This is the circuit schematic diagram of the second part of this utility model.

[0016] In the diagram, 1. Mains input and rectification / filtering circuit; 2. Flyback converter and transformer circuit; 3. Secondary rectifier circuit; 4. Battery detection and reverse connection protection circuit; 5. Flyback IC control circuit; 6. Dual-channel temperature detection circuit; 7. Intelligent MCU circuit; 8. One-line communication protocol circuit; 9. 5V linear regulator circuit; 10. Main control MCU control circuit; 11. 4G communication module circuit; 12. 3.3V linear regulator circuit. Detailed Implementation

[0017] The present invention will be further illustrated below with reference to specific examples and accompanying drawings.

[0018] like Figure 1-3 As shown, a 4G intelligent connected charging electric vehicle charger includes the following internal circuits: 1. Mains power input and rectification filter circuit; 2. Flyback converter and transformer circuit; 3. Secondary rectifier circuit; 4. Battery detection and reverse connection protection circuit; 5. Flyback IC control circuit; 6. Dual-channel temperature detection circuit; 7. Intelligent MCU circuit; 8. One-line communication protocol circuit; 9. 5V linear regulator circuit; 10. Main control MCU control circuit; 11. 4G communication module circuit; and 12. 3.3V linear regulator circuit.

[0019] The mains input and rectification filter circuit 1 is equipped with a fuse F1, a varistor ZR1 and a thermistor RT1, which have better protection against lightning strikes and overvoltage and overcurrent.

[0020] The mains input and rectification filter circuit 1 sequentially passes through the flyback converter and transformer circuit 2 and the secondary rectifier circuit 3 to form a charging output in the battery detection and reverse connection protection circuit 4. The flyback IC control circuit 5 controls the output of the flyback converter and transformer circuit 2. The flyback IC control circuit 5 includes a control chip U1, model OB5282. The dual-channel temperature detection circuit 6 includes two thermistors RT3 and RT4, and outputs corresponding control signals NTC3 and NTC4. The intelligent MCU circuit 7 includes a main control chip U2, model CMS8S6990. Pin 5 of chip U2 is connected to the Isense sampling point of the battery detection and reverse connection protection circuit 4 for collecting current data through resistor R63. Pin 12 of chip U2 is connected to the VBAT_sense sampling point of the battery detection and reverse connection protection circuit 4 for collecting voltage data. Pins 3 and 20 of chip U2 are respectively connected to the K3 control signal and CRG CTL control signal transmitted by the one-line communication protocol circuit 8. Pins 18 and 21 of chip U2 are respectively connected to the control signals NTC3 and NTC4 of the dual-channel temperature detection circuit 6. Pin 15 of chip U2 outputs the control signal VBAT ON to the control electrode of transistor Q6 of the battery detection and reverse connection protection circuit 4. The intelligent MCU circuit 7 is equipped with a charging status indicator LED1, which uses green and red lights to indicate whether charging is complete. The 5V linear regulator circuit 9 converts the other secondary output of the transformer in the flyback converter and transformer circuit 2 into a +5V voltage output, which is then supplied to the intelligent MCU circuit 7. The 4G communication module circuit 11 includes a main control chip U3 (EC800K), a SIM card holder chip U5, and a peripheral circuit chip U4. The main control MCU circuit 10 includes a chip U8 (AT32F403ACGT7). Pin 7 (power-on / off control pin) of chip U3 in the 4G communication module circuit 11 is connected to diode Q6. The control electrode of diode Q6 is connected to pin 46 of chip U8 through resistor R26, and chip U8 controls the power-on / off of the 4G communication module circuit 11. Pins 17 (EC800K RX) and 18 (EC800K TX) of chip U3 in the 4G communication module circuit 11 are connected to pins 31 (MCU_RX1) and 30 (MCU_TX1) of chip U8 after circuit conversion, respectively. Pins 19 (EC800KDTR), 20 (EC800K RI), and 21 (EC800K DCD) of chip U3 in the 4G communication module circuit 11 are connected to pins 40, 39, and 38 of chip U8, respectively. Pins 22 (MCU_RX3) and 21 (MCU_TX3) of chip U8 in the main control MCU circuit 10 are connected to pins 8 (DSDA_TX1) and 22 (DSCK_RX1) of the intelligent MCU circuit 7 after circuit conversion.Ultimately, the control signals transmitted from the 4G communication module circuit 11 to the intelligent MCU circuit 7 are realized, enabling remote control. The 4G communication module circuit 11 is equipped with a chip U3 working status indicator LED2 and a network status indicator LED3. The 3.3V linear voltage regulator circuit 12 draws from the 5V linear voltage regulator circuit 9 and converts it into a +3.3V voltage output, which is used by the main control MCU control circuit 10 and the 4G communication module circuit 11.

[0021] The 5V linear voltage regulator circuit 9 is connected to a cooling fan, and the start and stop of the fan is controlled by the intelligent MCU circuit 7.

[0022] The above embodiments are merely preferred embodiments of the present utility model and are only used to explain the present utility model, not to limit the present utility model. Any changes, substitutions, combinations, simplifications, modifications, etc., made by those skilled in the art without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A 4G intelligent connected charging control electric vehicle charger, characterized in that: Its internal circuitry includes a mains power input and rectification / filtering circuit, a flyback converter and transformer circuit, a secondary rectifier circuit, a battery detection and reverse connection protection circuit, a flyback IC control circuit, a dual-channel temperature detection circuit, a smart MCU circuit, a one-line communication protocol circuit, a 5V linear regulator circuit, a main control MCU control circuit, a 4G communication module circuit, and a 3.3V linear regulator circuit. The mains power input and rectification / filtering circuit sequentially passes through the flyback converter and transformer circuit, and the secondary rectifier circuit to form a charging output at the battery detection and reverse connection protection circuit. The flyback IC control circuit controls the output of the flyback converter and transformer circuit. The dual-channel temperature detection circuit includes two thermistors RT3 and RT4, and outputs corresponding control signals NTC3 and NTC4. The smart MCU circuit includes a main control chip U2, model CMS8S6990, whose input terminal receives power from the battery detection... The current and voltage sampling data collected by the reverse connection protection circuit, the control signals transmitted from the one-line communication protocol circuit, and the control signals introduced from the dual-channel temperature detection circuit control the output of the battery detection and reverse connection protection circuit; the 5V linear regulator circuit converts the other secondary output of the transformer in the flyback converter and transformer circuit into a +5V voltage output for use by the intelligent MCU circuit; the 4G communication module circuit includes a chip U3 of model EC800K, and the main control MCU control circuit includes a chip U8 of model AT32F403ACGT7. The 4G communication module circuit transmits control signals to the intelligent MCU circuit through the main control MCU control circuit; the 3.3V linear regulator circuit draws from the 5V linear regulator circuit and converts it into a +3.3V voltage output for use by the main control MCU control circuit and the 4G communication module circuit.

2. The electric vehicle charger with 4G intelligent connected charging control according to claim 1, characterized in that: The mains input and rectification filter circuit includes a fuse F1, a varistor ZR1, and a thermistor RT1.

3. The electric vehicle charger with 4G intelligent connected charging control according to claim 1, characterized in that: The flyback IC control circuit includes a control chip U1, model OB5282.

4. The electric vehicle charger with 4G intelligent connected charging control according to claim 1, characterized in that: The 5V linear voltage regulator circuit is connected to a cooling fan, and the start and stop status of the fan is controlled by the intelligent MCU circuit 7.

5. The electric vehicle charger with 4G intelligent connected charging control according to claim 1, characterized in that: The intelligent MCU circuit is equipped with a charging status indicator light.

6. The electric vehicle charger with 4G intelligent connected charging control according to claim 1, characterized in that: The 4G communication module circuit is equipped with a chip U3 working status indicator and a network status indicator.

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