CN216033797U

CN216033797U - Control panel of AC single-phase charging box

Info

Publication number: CN216033797U
Application number: CN202122680140.6U
Authority: CN
Inventors: 李信南; 张聪; 张宏宾
Original assignee: Huizhou Seelop New Energy Technology Co ltd
Current assignee: Huizhou Seelop New Energy Technology Co ltd
Priority date: 2021-11-03
Filing date: 2021-11-03
Publication date: 2022-03-15
Anticipated expiration: 2031-11-03

Abstract

The utility model discloses a control panel of an AC single-phase charging box, which comprises a control panel, wherein the control panel is integrated with an MCU, an LCD display module, a temperature detection module, a detection module and an electric leakage self-checking module, when the control panel is used, the LCD display module can be used for displaying data such as current, voltage, time, charging state and the like during charging, the temperature detection module can be used for judging the temperature value during charging, if the temperature exceeds a set limit value (such as 90 degrees), the charging is not carried out and warning is given out, the detection module can be used for detecting the current, voltage and electric leakage condition during charging, if the current is overlarge, the charging is forbidden, if the voltage is higher or lower, the charging is forbidden, if the electric leakage self-checking module generates an electric leakage signal in a simulating way, so as to detect whether the electric leakage self-checking module fails or not, so that the device has higher practicability and safety during use, is convenient for use.

Description

Control panel of AC single-phase charging box

Technical Field

The utility model relates to the technical field of charging box control boards, in particular to an alternating-current single-phase charging box control board.

Background

With the continuous development of new energy vehicles, the amount of new energy vehicles on the market is more and more preserved, and the requirement on the charging safety performance is higher and higher, but the alternating current charging box for charging the new energy vehicles on the market is poor in safety detection, low in service performance and not convenient to use, so that an alternating current single-phase charging box control board needs to be provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an alternating current single-phase charging box control panel, which has higher practicability and safety in use through the design of an MCU (microprogrammed control Unit), an LCD (liquid Crystal display) module, a temperature detection module, a detection module, an electric leakage self-checking module and the like so as to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: the alternating-current single-phase charging box control panel comprises a control panel, wherein an MCU (microprogrammed control Unit), an auxiliary power supply module, an LCD (liquid Crystal display) module, a temperature detection module, a relay control module, a clock control module, a detection module, a grounding detection module, an electric leakage self-checking module and two RS232 communication interfaces are integrated on the control panel;

electrically connected between the integrated chip on auxiliary power supply module and the control panel, electrically connected between MCU and the LCD display module, LCD display module passes through LCD interface and outside display screen electric connection, electrically connected between MCU and the temperature detection module, and the temperature detection module includes outside temperature detecting element, electrically connected between MCU and the relay control module, electrically connected between MCU and the clock control module, electrically connected between MCU and the detection module, electrically connected between MCU and the ground connection detection module, electrically connected between MCU and the electric leakage self-checking module, electrically connected between MCU and the two way RS232 communication interface.

Preferably, the MCU is set as a GD chip of a model GD32F407VET6 for controlling the whole control panel, the GD chip has the working frequency of 72M, a 12M crystal oscillator is adopted outside, and an ADC and a data acquisition voltage measurement component are integrated.

Preferably, the auxiliary power supply module is integrated on the control panel, the auxiliary power supply module supplies power to the internal chip of the control panel through positive and negative 12V and 3.3V, the power supply adopts an AC/DC power supply mode, and the auxiliary power supply module comprises three transformer winding outputs.

Preferably, the temperature detection module is integrated on the control board, and the temperature detection module comprises an ADC detection external resistor, and the ADC detection external resistor is connected with an ADC interface of the MCU through the TEM.

Preferably, the relay control module is integrated on the control board and comprises a relay, and the MCU drives the MOS tube through the IO port to control the on-off of the relay;

when the IO port outputs a high level, the MOS tube is conducted, the relay coil has voltage, and the relay is closed;

when the IO port outputs a low level, the MOS tube is closed, the relay coil has no voltage, and the relay is disconnected.

Preferably, the detection module is integrated on the control board, and the detection module includes a current transformer, a voltage transformer and a leakage transformer for current detection, voltage detection and leakage detection.

Preferably, the grounding detection module is integrated on the control board, and the grounding detection module is electrically connected with the MCU through the voltage division and comparison circuit.

Preferably, the electric leakage self-checking module is integrated on the control board, and the electric leakage self-checking module is electrically connected with the electric leakage transformer.

Preferably, two way RS232 communication interface are integrated on the control panel, MCU passes through between USART1 and the USART4 and two way RS232 communication interface electric connection, two way RS232 communication interface are provided with the interface that is used for connecting outside card reader and 4G communication module.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model uses the design of MCU, LCD display module, temperature detection module, detection module and leakage self-checking module, the LCD display module can display the data of current, voltage, time, charging state, etc. during charging, the temperature detection module can judge the temperature value during charging, if the temperature exceeds the set limit value (such as 90 degrees), the charging is not executed and the alarm is given, the detection module can detect the current, voltage and leakage condition during charging, if the current is too large, the charging is forbidden, if the voltage is higher or lower, the charging is forbidden, if the leakage occurs, the leakage self-checking module can simulate to generate leakage signal to detect whether the leakage self-checking module is invalid, so that the device has higher practicability and safety during use and is convenient to use.

Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model, the object and other advantages of the utility model being realized and attained by the structure particularly pointed out in the specification and the drawings.

Drawings

FIG. 1 is a logic block diagram of a control board according to the present invention;

FIG. 2 is a circuit diagram of the color LCD display function according to the present invention;

FIG. 3 is a circuit diagram of the auxiliary power supply integrated on a single board according to the present invention;

FIG. 4 is a circuit structure diagram of the MCU control of the present invention;

FIG. 5 is a circuit configuration diagram of the external temperature detection of the present invention;

FIG. 6 is a circuit structure diagram of the present invention for controlling the on/off of the relay;

FIG. 7 is a circuit diagram of the internal clock outputting PWM square wave signal at IO port according to the present invention;

FIG. 8 is a circuit diagram of the integrated current, voltage, leakage transformer of the present invention;

FIG. 9 is a circuit configuration diagram of the ground detection of the present invention;

FIG. 10 is a circuit diagram of the leakage self-test of the present invention;

fig. 11 is a circuit diagram of the two-way 232 interface of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-11, the present invention provides a technical solution:

single-phase box control panel that charges of interchange, including the control panel, its characterized in that: the control panel is integrated with an MCU, an auxiliary power supply module, an LCD display module, a temperature detection module, a relay control module, a clock control module, a detection module, a grounding detection module, an electric leakage self-checking module and two RS232 communication interfaces;

The specific function of the box control panel that charges of this application is as follows:

(1) the color screen LCD display function, as shown in figure 2,

the MCU is connected with an external 3.5-inch display screen through an internal LCD interface, and data to be displayed are output to the 3.5-inch display screen through DB0-DB7 for display;

the display screen is a 3.5-inch color display screen, and display data mainly comprise charging current, voltage, time, charging state and the like;

the hardware connecting wires CS, REST, WR, RD, DB0, DB1, DB2, DB3, DB4, DB5, DB6 and DB7 are connected with the MCU, and the MUC outputs the signals to a 3.5-inch display screen for display through DB0-DB 7;

(2) the single board integrates an auxiliary power supply, as shown in figure 3,

the power supply adopts AC/DC, the power supply is output by a transformer winding, 3 output windings output 3.3V, 12.5V and-12.5V through a high-frequency transformer winding, wherein 3.3V is the working voltage of the MCU;

(3) the integrated MCU control, as shown in figure 4,

the MCU controls the logic of the whole single board. The chip adopts a GD chip, and the model is as follows: the GD32F303VET6, the working frequency of the chip is 72M, the 12M crystal oscillator is adopted outside, the ADC is integrated, the measurement of data voltage can be collected, the LCD driving module is integrated, a 2.8-inch color screen can be driven, and an SWD program upgrading interface is adopted;

(4) integrated external temperature sensing, as shown in figure 5,

the MCU detects the resistance value of the external resistor through the ADC to judge a temperature value, the read temperature is subjected to over-temperature judgment, hardware is connected with an ADC interface of the MCU through the TEM, the MCU reads the value of the ADC to judge a current temperature value, and if the temperature exceeds a set limit value (such as 90 degrees), the MCU executes no-charging and gives an alarm;

(5) the MCU controls the on-off of the relay by driving the MOS tube through the IO port, as shown in figure 6,

when the IO port outputs a low level, the MOS tube is closed, the relay coil has no voltage, and the relay is disconnected;

as for the hardware connection in fig. 9, the Relay _ CTRL1 is connected to the MCU, and when the MCU detects that the gun is plugged, the MCU pulls up the pull-in Relay through the Relay _ CTRL1, and when the gun is not charged, the MCU pulls down the disconnect Relay through the Relay _ CTRL 1;

(6) the clock control, as shown in figure 7,

the MCU outputs a PWM square wave model at an IO port through an internal clock, drives a PWM circuit, outputs a PWM signal waveform of positive and negative 12V at the port, is connected with a signal line at a vehicle end, and the vehicle end charges corresponding rated current according to the duty ratio of the signal PWM and is compatible with electric vehicles of European and American standard interfaces;

(7) the single board integrates current, voltage and leakage transformers, and as shown in fig. 8, current detection, voltage detection and leakage detection can be performed;

the Meter _ CT +, Meter _ CT-is connected to a current detection interface of the metering chip, and the metering chip calculates the actual current through the signal and transmits the data to the MCU for internal processing;

meter _ V +, Meter _ V-, is connected to a voltage detection interface of the metering chip, and the metering chip calculates the actual voltage through the signal and transmits the data to the MCU for internal processing;

the device comprises a device chip, a detection interface, a power leakage chip, a MCU (microprogrammed control unit) and a power leakage chip, wherein the device chip is connected with the detection interface of the power leakage chip, the device chip calculates actual power leakage through the signal, and the power leakage chip transmits the signal to the MCU for processing when power leakage occurs;

and judging whether the current value is over-current or not by the MCU according to the read current value. If the current is too large, the charging is forbidden;

and the MCU judges whether the voltage is over-voltage or under-voltage according to the read voltage value. If the voltage is higher or lower, the charging is forbidden;

the current and the voltage can be further used for counting the charging capacity;

when electric leakage occurs, the electric leakage chip transmits electric leakage information to the MCU through pulling up the electric level, and charging is forbidden when the electric leakage occurs;

(8) the ground detection, as shown in figure 9,

current is generated through the live line and the neutral line of the power line to the ground, and a loop is formed to generate voltage. The MCU judges whether grounding exists or not through voltage, the voltage represents grounding, a grounding detection circuit is integrated, and a signal of whether grounding exists or not is sent to the CPU through a voltage division and comparison circuit;

the MCU detects whether the PGND-TEST1 has voltage to judge the grounding condition;

when the voltage of PGND-TEST1 is high, grounding is normal;

when the voltage of PGND-TEST1 is low, the grounding is abnormal;

(9) the self-test of leakage, as shown in figure 10,

the MCU carries out electric Leakage simulation by pulling up the Leakage _ IO to generate an electric Leakage signal, the CHK + and the CHK-are jumped to the mutual inductor, and the MCU pin detects whether the electric Leakage module generates electric Leakage or not to detect whether the electric Leakage module fails or not;

(10) the two-way 232 interface, as shown in figure 11,

and the USART1 and the USART4 of the MCU are connected, and two interfaces are led out to be connected with an external card reader or a 4G module for communication.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Single-phase box control panel that charges of interchange, including the control panel, its characterized in that: the control panel is integrated with an MCU, an auxiliary power supply module, an LCD display module, a temperature detection module, a relay control module, a clock control module, a detection module, a grounding detection module, an electric leakage self-checking module and two RS232 communication interfaces;

2. The ac single-phase charging box control board according to claim 1, wherein: the MCU is set as a GD chip of a model GD32F407VET6 for controlling the whole control panel, the GD chip has the working frequency of 72M, a 12M crystal oscillator is adopted outside, and an ADC and a data acquisition voltage measurement assembly are integrated.

3. The ac single-phase charging box control board according to claim 1, wherein: the auxiliary power supply module is integrated on the control panel, the auxiliary power supply module supplies power for an internal chip of the control panel through positive and negative 12V and 3.3V, an AC/DC power supply mode is adopted for the power supply, and the auxiliary power supply module comprises three transformer winding outputs.

4. The ac single-phase charging box control board according to claim 1, wherein: the temperature detection module is integrated on the control panel, the temperature detection module comprises an ADC detection external resistor, and the ADC detection external resistor is connected with an ADC interface of the MCU through the TEM.

5. The ac single-phase charging box control board according to claim 1, wherein: the relay control module is integrated on the control panel and comprises a relay, and the MCU controls the on-off of the relay by driving the MOS tube through the IO port;

6. The ac single-phase charging box control board according to claim 1, wherein: the detection module is integrated on the control panel and comprises a current transformer, a voltage transformer and a leakage transformer, wherein the current transformer, the voltage transformer and the leakage transformer are used for detecting current, voltage and leakage.

7. The ac single-phase charging box control board according to claim 1, wherein: the grounding detection module is integrated on the control panel and is electrically connected with the MCU through the voltage division and comparison circuit.

8. The ac single-phase charging box control board according to claim 6, wherein: the electric leakage self-checking module is integrated on the control panel and is electrically connected with the electric leakage mutual inductor.

9. The ac single-phase charging box control board according to claim 1, wherein: two way RS232 communication interface integration are on the control panel, MCU passes through between USART1 and the USART4 and two way RS232 communication interface electric connection, two way RS232 communication interface are provided with the interface that is used for connecting outside card reader and 4G communication module.