New energy charging pile indicating lamp circuit with signal amplification function

Abstract

The utility model provides a new energy charging pile indicating lamp circuit for signal amplification, which comprises a power supply circuit, an RS485 communication driving circuit, an MCU circuit, a digital-to-electricity conversion circuit, a push-pull circuit and an interface module, and is characterized in that the interface module is respectively connected with the power supply circuit, the MCU circuit and the RS485 communication driving circuit; the interface module is used for providing power input for the power supply circuit and outputting signals for the MCU circuit and the RS485 communication driving circuit, the MCU circuit is in two-way connection with the RS485 communication driving circuit, the RS485 communication driving circuit is used for converting TTL level signals of an MCU into RS485 differential signals, the MCU circuit is connected with the push-pull circuit through the digital-to-electricity conversion circuit, and the push-pull circuit is connected with the MCU circuit through the digital-to-electricity conversion circuit. The digital-to-electricity conversion circuit is used for converting digital signals output by the MCU into analog signals, the push-pull circuit is connected with the interface module, the push-pull circuit is used for amplifying the analog signals output by the digital-to-electricity conversion circuit, the stability of the signals is effectively improved, the MCU is sufficient in capacity, and the use requirement is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electricity, more specifically, a signal amplification new energy charging pile indicating lamp circuit. BACKGROUND

[0002] The charging pile is similar to the refueling machine in the gas station, can be fixed on the ground or wall, is installed in public building (public building, shopping mall, public parking lot and the like) and residential quarter parking lot or charging station, can be charged for various models of electric vehicles according to different voltage grades. The input end of the charging pile is directly connected with the AC power grid, and the output end is provided with a charging plug for charging the electric vehicle.

[0003] The closest prior art is a charging pile indicating lamp driving circuit based on RS485 communication, including power supply circuit, voltage isolation circuit, digital isolation circuit, single-chip microcomputer circuit and decoder circuit, the first output end of the power supply circuit is connected with the input end of the voltage isolation circuit, the voltage isolation circuit is used to isolate the working power supply and not damage the charging pile, the output end of the voltage isolation circuit is connected with the input end of the digital isolation circuit, the digital isolation circuit is used to receive RS485 signal and carry out signal isolation, the output end of the digital isolation circuit is connected with the single-chip microcomputer circuit, the output end of the single-chip microcomputer circuit is connected with the input end of the decoder circuit, and the output end of the decoder circuit is connected with a plurality of LED lamp devices.

[0004] The capacity of the MCU of the existing charging pile indicating lamp driving circuit is insufficient, and the signal is easy to be disturbed, and there are use defects.

[0005] Therefore, the utility model provides a signal amplification new energy charging pile indicating lamp circuit that can amplify signals and has sufficient MCU capacity. UTILITY MODEL CONTENTS

[0006] The utility model relates to the technical field of electricity, more specifically, a signal amplification new energy charging pile indicating lamp circuit.

[0007] The application discloses a new energy charging pile indicating lamp circuit with signal amplification, which comprises a power supply circuit, an RS485 communication driving circuit, an MCU circuit, a digital-electricity conversion circuit, a push-pull circuit and an interface module, wherein the power supply circuit is connected with the RS485 communication driving circuit, the MCU circuit, the digital-electricity conversion circuit, the push-pull circuit and the interface module; the power supply circuit is used for providing corresponding 12V, 5V and 3.3V power supply for the RS485 communication driving circuit, the MCU circuit, the digital-electricity conversion circuit, the push-pull circuit and the interface module; the interface module is connected with the power supply circuit, the MCU circuit and the RS485 communication driving circuit; the interface module is used for providing power input for the power supply circuit and signal output for the MCU circuit and the RS485 communication driving circuit; the MCU circuit is bidirectionally connected with the RS485 communication driving circuit; the RS485 communication driving circuit is used for converting a TTL level signal of the MCU into an RS485 differential signal; the MCU circuit is connected with the push-pull circuit through the digital-electricity conversion circuit; the digital-electricity conversion circuit is used for converting a digital signal output by the MCU into an analog signal; and the push-pull circuit is connected with the interface module and is used for amplifying the analog signal output by the digital-electricity conversion circuit.

[0008] Further, the MCU circuit comprises an MCU chip U6, the digital-electricity conversion circuit comprises a conversion chip U8, the RS485 communication driving circuit is connected with the MCU chip U6, the 29th pin of the MCU chip U6 is connected with the 7th pin of the conversion chip U8, the 30th pin of the MCU chip U6 is connected with the 5th pin of the conversion chip U8, the 31st pin of the MCU chip U6 is connected with the 3rd pin of the conversion chip U8, and the 2nd pin, the 4th pin and the 6th pin of the conversion chip U8 are connected with the push-pull circuit.

[0009] Further, the 29th pin of the MCU chip U6 and the 7th pin of the conversion chip U8 are further provided with a resistor R29, the 30th pin of the MCU chip U6 and the 5th pin of the conversion chip U8 are further provided with a resistor R26, and the 31st pin of the MCU chip U6 and the 3rd pin of the conversion chip U8 are further provided with a resistor R27; the resistor R29, the resistor R26 and the resistor R27 have a current limiting effect.

[0010] In some embodiments, the push-pull circuit includes NPN transistor Q12, PNP transistor Q13, NPN transistor Q11, PNP transistor Q10, NPN transistor Q7, PNP transistor Q8, NPN transistor Q12, PNP transistor Q13, NPN transistor Q11, PNP transistor Q10, NPN transistor Q7, PNP transistor Q8 all play a role in signal amplification, the 2th pin, 4th pin, 6th pin of the conversion chip U8 are connected with the push-pull circuit, the 2th pin of the conversion chip U8 is connected with the interface module through NPN transistor Q11 and PNP transistor Q10, the 4th pin of the conversion chip U8 is connected with the interface module through NPN transistor Q12 and PNP transistor Q13, the 6th pin of the conversion chip U8 is connected with the interface module through NPN transistor Q7 and PNP transistor Q8, when the 2th pin, 4th pin, 6th pin of the conversion chip U8 are high level, NPN transistor Q11, NPN transistor Q12, NPN transistor Q7 are turned on, when the 2th pin, 4th pin, 6th pin of the conversion chip U8 are low level, PNP transistor Q10, PNP transistor Q13, PNP transistor Q8 are turned on, which ensures that it can be turned on when it is high or low.

[0011] Further, the NPN transistor Q12 is further connected with resistor R22, the NPN transistor Q7 is further connected with resistor R23, the NPN transistor Q11 is further connected with resistor R24, the PNP transistor Q13 is further connected with resistor R25, the PNP transistor Q11 is further connected with resistor R28, the PNP transistor Q8 is further connected with resistor R32, the resistor R22, the resistor R23, the resistor R24, the resistor R25, the resistor R28, the resistor R32 all play a role in limiting current to prevent excessive current.

[0012] In some embodiments, the interface module includes interface J1, interface J2, interface J3, interface J4, interface J5, the power supply circuit is connected with the interface J1, the interface J2, the interface J3, the interface J4, the interface J1, the interface J2, the interface J3 are used to provide 5V power supply and signal interface, the interface J4 is used to input 12V power supply, the interface J5 is used to provide RS485 signal interface.

[0013] In some embodiments, the MCU circuit is further connected with crystal oscillator X1 for providing clock source to ensure stable operation of the MCU circuit; the crystal oscillator X1 is connected with capacitor C39 and capacitor C40, and the capacitor C39 and the capacitor C40 are used to ensure the oscillation of the crystal oscillator and provide stable oscillation frequency.

[0014] In some embodiments, the RS485 communication driving circuit is further connected with a protection circuit, and the protection circuit includes diode D1, diode D2 and diode D3, which are used to prevent electrostatic discharge and transient voltage from damaging the circuit.

[0015] In some embodiments, the MCU chip U6 is STM32F103C8T6.

[0016] In some embodiments, the conversion chip U8 is CD4504BPW.

[0017] The utility model discloses a new energy charging pile indicating lamp circuit of signal amplification, including power supply circuit, RS485 communication drive circuit, MCU circuit, digital -electronic conversion circuit, push -pull circuit, interface module, interface module is connected with power supply circuit, MCU circuit, RS485 communication drive circuit respectively, and interface module is used for providing power supply input for power supply circuit and is for MCU circuit, RS485 communication drive circuit signal output, and MCU circuit is connected with RS485 communication drive circuit bidirectionally, and RS485 communication drive circuit is used for the TTL level signal conversion of MCU to RS485 difference signal, and MCU circuit is connected with push -pull circuit through digital -electronic conversion circuit, and digital -electronic conversion circuit is used for converting the digital signal of MCU output into analog signal, and push -pull circuit is connected with interface module, and push -pull circuit is used for the analog signal of digital -electronic conversion circuit output is amplified, effectively improves the stability of signal, and MCU capacity is sufficient, satisfies the use demand. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the circuit structure diagram of power supply circuit of a new energy charging pile indicating lamp circuit of signal amplification of the application.

[0019] Figure 2 It is the circuit structure diagram of RS485 communication drive circuit, MCU circuit of a new energy charging pile indicating lamp circuit of signal amplification of the application.

[0020] Figure 3 It is the partial amplification circuit structure diagram of MCU circuit of a new energy charging pile indicating lamp circuit of signal amplification of the application.

[0021] Figure 4 It is the circuit structure diagram of digital -electronic conversion circuit of a new energy charging pile indicating lamp circuit of signal amplification of the application.

[0022] Figure 5 It is the circuit structure diagram of push -pull circuit of a new energy charging pile indicating lamp circuit of signal amplification of the application.

[0023] Figure 6 It is the circuit structure diagram of interface module of a new energy charging pile indicating lamp circuit of signal amplification of the application.

[0024] MAIN ELEMENT SYMBOL EXPLANATION

[0025] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0026] The following embodiments are described to aid in understanding this application. These embodiments are not, and should not be, construed in any way as limiting the scope of protection of this application.

[0027] In the following description, those skilled in the art will recognize that throughout this discussion, components may be described as individual functional units (which may include subunits), but those skilled in the art will recognize that various components or portions thereof may be divided into individual components or may be integrated together (including integrated within a single system or component).

[0028] Furthermore, the connection between components or systems is not intended to be limited to a direct connection; on the contrary, data between these components may be modified, reformatted, or otherwise altered by intermediate components. Additionally, other or fewer connections may be used. It should also be noted that the terms "connection," "link," or "input" should be understood to include direct connections, indirect connections via one or more intermediate devices, and wireless connections. Example 1

[0029] like Figure 1 The diagram shown is a circuit structure diagram of the power supply circuit for a signal amplification indicator light circuit of a new energy charging pile according to this application; as shown... Figure 2 The diagram shown is a circuit structure diagram of the RS485 communication driver circuit and MCU circuit of a signal amplification indicator light circuit for a new energy charging pile according to this application; Figure 3 The diagram shown is a partial amplifier circuit structure diagram of the MCU circuit for a signal amplification indicator light circuit of a new energy charging pile according to this application; as shown... Figure 4 The diagram shown is a circuit structure diagram of a digital-to-electronic conversion circuit for a new energy charging pile indicator light circuit with signal amplification according to this application; as shown... Figure 5 The diagram shown is a push-pull circuit structure diagram of a signal amplification indicator light circuit for a new energy charging pile according to this application; Figure 6 The diagram shown is a circuit structure diagram of the interface module of a signal amplification indicator light circuit for a new energy charging pile according to this application.

[0030] The MCU chip U6 is STM32F103C8T6, and the conversion chip U8 is CD4504BPW, and the new energy charging pile indicating lamp circuit is characterized in that the power supply circuit is connected with the RS485 communication driving circuit, the MCU circuit, the digital-electricity conversion circuit, the push-pull circuit and the interface module, the power supply circuit is used for providing corresponding 12V, 5V and 3.3V power supply for the RS485 communication driving circuit, the MCU circuit, the digital-electricity conversion circuit, the push-pull circuit and the interface module, the interface module is connected with the power supply circuit, the MCU circuit and the RS485 communication driving circuit, the interface module is used for providing power input for the power supply circuit and signal output for the MCU circuit and the RS485 communication driving circuit, the MCU circuit is bidirectionally connected with the RS485 communication driving circuit, the RS485 communication driving circuit is used for converting the TTL level signal of the MCU into an RS485 differential signal, the MCU circuit is connected with the push-pull circuit through the digital-electricity conversion circuit, the digital-electricity conversion circuit is used for converting the digital signal output by the MCU into an analog signal, and the push-pull circuit is connected with the interface module and is used for amplifying the analog signal output by the digital-electricity conversion circuit.

[0031] The MCU circuit comprises the MCU chip U6, and the digital-electricity conversion circuit comprises the conversion chip U8, the RS485 communication driving circuit is connected with the MCU chip U6, the 29th pin of the MCU chip U6 is connected with the 7th pin of the conversion chip U8, the 30th pin of the MCU chip U6 is connected with the 5th pin of the conversion chip U8, the 31st pin of the MCU chip U6 is connected with the 3rd pin of the conversion chip U8, and the 2nd pin, the 4th pin and the 6th pin of the conversion chip U8 are connected with the push-pull circuit.

[0032] The 29th pin of the MCU chip U6 is connected with the 7th pin of the conversion chip U8, the 30th pin of the MCU chip U6 is connected with the 5th pin of the conversion chip U8, the 31st pin of the MCU chip U6 is connected with the 3rd pin of the conversion chip U8, and the 2nd pin, the 4th pin and the 6th pin of the conversion chip U8 are connected with the push-pull circuit.

[0033] The push-pull circuit comprises NPN triode Q12, PNP triode Q13, NPN triode Q11, PNP triode Q10, NPN triode Q7, and PNP triode Q8, and the NPN triode Q12, the PNP triode Q13, the NPN triode Q11, the PNP triode Q10, the NPN triode Q7, and the PNP triode Q8 all play a role in signal amplification; the 2nd pin, the 4th pin, and the 6th pin of the conversion chip U8 are connected with the push-pull circuit, the 2nd pin of the conversion chip U8 is connected with the interface module through the NPN triode Q11 and the PNP triode Q10, the 4th pin of the conversion chip U8 is connected with the interface module through the NPN triode Q12 and the PNP triode Q13, and the 6th pin of the conversion chip U8 is connected with the interface module through the NPN triode Q7 and the PNP triode Q8; when the 2nd pin, the 4th pin, and the 6th pin of the conversion chip U8 are high level, the NPN triode Q11, the NPN triode Q12, and the NPN triode Q7 are turned on; when the 2nd pin, the 4th pin, and the 6th pin of the conversion chip U8 are low level, the PNP triode Q10, the PNP triode Q13, and the PNP triode Q8 are turned on, so that the triodes can be turned on when the high or low level is ensured.

[0034] The NPN triode Q12 is further connected with a resistor R22, the NPN triode Q7 is further connected with a resistor R23, the NPN triode Q11 is further connected with a resistor R24, the PNP triode Q13 is further connected with a resistor R25, the PNP triode Q11 is further connected with a resistor R28, and the PNP triode Q8 is further connected with a resistor R32; the resistor R22, the resistor R23, the resistor R24, the resistor R25, the resistor R28, and the resistor R32 all play a role in current limiting to prevent excessive current.

[0035] The interface module comprises interfaces J1, J2, J3, J4, and J5; the power supply circuit is connected with the interfaces J1, J2, J3, and J4; the interfaces J1, J2, and J3 are used for providing 5V power supply and signal interface; the interface J4 is used for inputting 12V power supply; and the interface J5 is used for providing RS485 signal interface.

[0036] The MCU circuit is further connected with a crystal oscillator X1 for providing a clock source and ensuring stable operation of the MCU circuit; the crystal oscillator X1 is connected with capacitors C39 and C40, and the capacitors C39 and C40 are used for ensuring the crystal oscillator to oscillate and providing a stable oscillation frequency.

[0037] The RS485 communication driving circuit is further connected with a protection circuit, and the protection circuit comprises diodes D1, D2, and D3, which are used for preventing electrostatic discharge and transient voltage from damaging the circuit.

[0038] The utility model discloses a new energy charging pile indicating lamp circuit that signal amplification has beneficial effect: the utility model provides a new energy charging pile indicating lamp circuit that signal amplification includes power supply circuit, RS485 communication drive circuit, MCU circuit, digital -electrical conversion circuit, push -pull circuit, interface module, interface module is connected with power supply circuit, MCU circuit, RS485 communication drive circuit respectively, and interface module is used for providing power supply input for power supply circuit and is for MCU circuit, RS485 communication drive circuit signal output, and MCU circuit is connected with RS485 communication drive circuit bidirectionally, and RS485 communication drive circuit is used for the TTL level signal conversion of MCU's RS485 difference signal, and MCU circuit is connected with push -pull circuit through digital -electrical conversion circuit, and digital -electrical conversion circuit is used for converting the digital signal of MCU output into analog signal, and push -pull circuit is connected with interface module, and push -pull circuit is used for the analog signal of digital -electrical conversion circuit output amplification, effectively improves the stability of signal, and MCU capacity is sufficient, satisfies the use demand.

[0039] Although the present application has disclosed a plurality of aspects and embodiments, other aspects and embodiments will be apparent to those skilled in the art, and several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. The aspects and embodiments disclosed in the present application are only used for illustration, and are not intended to limit the present application, and the actual protection scope of the present application is subject to the claims.

Claims

1. A new energy charging pile indicating lamp circuit for signal amplification, comprising a power supply circuit, an RS485 communication driving circuit, an MCU circuit, a digital-to-analog conversion circuit, a push-pull circuit and an interface module, characterized in that: The power supply circuit is connected with the RS485 communication driving circuit, the MCU circuit, the digital-electricity conversion circuit, the push-pull circuit and the interface module, and is used for providing corresponding 12V, 5V and 3.3V power supply for the RS485 communication driving circuit, the MCU circuit, the digital-electricity conversion circuit, the push-pull circuit and the interface module. The interface module is connected with the power supply circuit, the MCU circuit and the RS485 communication driving circuit, and is used for providing power input for the power supply circuit and signal output for the MCU circuit and the RS485 communication driving circuit. The MCU circuit is bidirectionally connected with the RS485 communication driving circuit, and is used for converting the TTL level signal of the MCU into the RS485 differential signal. The MCU circuit is connected with the push-pull circuit through the digital-electricity conversion circuit, and the digital-electricity conversion circuit is used for converting the digital signal output by the MCU into an analog signal. The push-pull circuit is connected with the interface module, and is used for amplifying the analog signal output by the digital-electricity conversion circuit. ​ 2. The signal amplification new energy charging pile indicating lamp circuit according to claim 1, characterized in that: The MCU circuit comprises an MCU chip U6, and the digital-electricity conversion circuit comprises a conversion chip U8. The RS485 communication driving circuit is connected with the MCU chip U6. The pin 29 of the MCU chip U6 is connected with the pin 7 of the conversion chip U8. The pin 30 of the MCU chip U6 is connected with the pin 5 of the conversion chip U8. The pin 31 of the MCU chip U6 is connected with the pin 3 of the conversion chip U8. The pins 2, 4 and 6 of the conversion chip U8 are connected with the push-pull circuit respectively.

3. The signal amplification new energy charging pile indicating lamp circuit according to claim 2, characterized in that: The pin 29 of the MCU chip U6 and the pin 7 of the conversion chip U8 are further provided with a resistor R29. The pin 30 of the MCU chip U6 and the pin 5 of the conversion chip U8 are further provided with a resistor R26. The pin 31 of the MCU chip U6 and the pin 3 of the conversion chip U8 are further provided with a resistor R27. The resistors R29, R26 and R27 have the function of current limiting.

4. The new energy charging pile indicating lamp circuit of claim 1, wherein: The push-pull circuit comprises NPN triode Q12, PNP triode Q13, NPN triode Q11, PNP triode Q10, NPN triode Q7 and PNP triode Q8. The NPN triode Q12, the PNP triode Q13, the NPN triode Q11, the PNP triode Q10, the NPN triode Q7 and the PNP triode Q8 all have the function of signal amplification. The pins 2, 4 and 6 of the conversion chip U8 are connected with the push-pull circuit respectively. The pin 2 of the conversion chip U8 is connected with the interface module through the NPN triode Q11 and the PNP triode Q10. The pin 4 of the conversion chip U8 is connected with the interface module through the NPN triode Q12 and the PNP triode Q13. The pin 6 of the conversion chip U8 is connected with the interface module through the NPN triode Q7 and the PNP triode Q8. When the pins 2, 4 and 6 of the conversion chip U8 are high level, the NPN triode Q11, the NPN triode Q12 and the NPN triode Q7 are turned on. When the pins 2, 4 and 6 of the conversion chip U8 are low level, the PNP triode Q10, the PNP triode Q13 and the PNP triode Q8 are turned on, so that they can be turned on when they are high or low.

5. The signal amplification new energy charging pile indicating lamp circuit according to claim 4, characterized in that: The NPN transistor Q12 is further connected with resistor R22, the NPN transistor Q7 is further connected with resistor R23, the NPN transistor Q11 is further connected with resistor R24, the PNP transistor Q13 is further connected with resistor R25, the PNP transistor Q11 is further connected with resistor R28, the PNP transistor Q8 is further connected with resistor R32, and the resistor R22, the resistor R23, the resistor R24, the resistor R25, the resistor R28 and the resistor R32 all play the role of current limiting to prevent excessive current.

6. The signal amplification new energy charging pile indicator lamp circuit according to claim 1, characterized in that: The interface module comprises interfaces J1, J2, J3, J4 and J5, the power supply circuit is connected with the interfaces J1, J2, J3 and J4, the interfaces J1, J2 and J3 are used for providing 5V power supply and signal interface, the interface J4 is used for inputting 12V power supply, and the interface J5 is used for providing RS485 signal interface.

7. The signal amplification new energy charging pile indicator lamp circuit according to claim 1, characterized in that: The MCU circuit is further connected with a crystal oscillator X1 for providing a clock source and ensuring stable operation of the MCU circuit; the crystal oscillator X1 is connected with capacitors C39 and C40, and the capacitors C39 and C40 are used for ensuring the crystal oscillator to oscillate and providing a stable oscillation frequency.

8. The new energy charging pile indicating lamp circuit of claim 1, wherein: The RS485 communication driving circuit is further connected with a protection circuit comprising diodes D1, D2 and D3, and the diodes D1, D2 and D3 are used for preventing electrostatic discharge and transient voltage from damaging the circuit.

9. The new energy charging pile indicating lamp circuit of signal amplification according to claim 2, characterized in that: The MCU chip U6 is of the specification STM32F103C8T6.

10. The new energy charging pile indicating lamp circuit of claim 2, wherein: The conversion chip U8 is of the specification CD4504BPW.

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