CP signal controller
Through the main control circuit and CP signal control circuit in the CP signal controller, the filter is formed using components such as the optocoupler U14 and relay K1 to improve the rising and falling edge speeds of the PWM signal, which solves the problem of slow PWM signal speed and improves the safety and stability of the charging pile.
Patent Information
- Application Number
- CN202422884676.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-11-26
AI Technical Summary
The rising and falling edge speeds of PWM signals of existing charging piles are too slow, resulting in increased switching losses, EMI problems, reduced control accuracy and signal distortion, affecting the efficiency and stability of charging piles.
A CP signal controller is adopted, including a main control circuit and a CP signal control circuit, and a filter is formed to increase the rising and falling edge speeds of the PWM signal through a power conversion circuit, and a 12V voltage supply is provided, combined with an indicator light control circuit to reflect the voltage state.
It significantly improves the rising and falling edge speeds of the PWM signal, avoids hysteresis effects and signal distortion, and improves the safety and reliability and use efficiency of the charging pile.
Smart Images
Figure CN223182121U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric vehicle charging piles, in particular to a CP signal controller. Background Art
[0002] As an important infrastructure for electric vehicles, new energy vehicle charging piles play a key role in providing electrical energy for electric vehicles. With the popularization of new energy vehicles, the demand for charging piles is increasing continuously, and the technical requirements are also rising day by day. The PWM signal of the charging pile should preferably maintain fast and clean rising and falling edges to ensure the efficient, stable and reliable operation of the charging pile.
[0003] Slow rising and falling edges of the PWM signal may cause problems such as increased switching losses, EMI problems, reduced control accuracy, hysteresis effects, and signal distortion. Therefore, a CP signal controller needs to be added to the control circuit to regulate the PWM signal. Summary of the Utility Model
[0004] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Simplifications or omissions may be made in this part, as well as in the abstract and title of the application, to avoid obscuring the purpose of this part, the abstract, and the title, and such simplifications or omissions shall not be used to limit the scope of the utility model.
[0005] In view of the above and / or existing problems in the regulation of the PWM signal of the charging pile, the present utility model is proposed.
[0006] Therefore, the purpose of the present utility model is to provide a CP signal controller, which can increase the rising and falling edge speeds of the PWM signal and solve the technical problem that the rising and falling edge speeds of the PWM signal of the existing charging pile are too slow, affecting the efficiency and stability of the overall system.
[0007] To solve the above technical problems, the present utility model provides the following technical solution: a CP signal controller, which includes,
[0008] A main control circuit, including a main control chip U1;
[0009] CP signal control circuit. The CP signal control circuit includes an optocoupler U14. One end of pin 1 of the optocoupler U14 is connected to one end of a resistor R47, and the other end of the resistor R47 is connected to pin 4 of a relay K1. One end of pin 5 of the optocoupler U14 is connected to one end of a resistor R60. The other end of the resistor R60 is connected to the negative electrode of a diode D17 and one end of a resistor R65. The positive electrode of the diode D17 is connected to one end of a resistor R64 and one end of a resistor R59. One end of pin 35 of the main control chip U1 is connected to one end of a resistor R51. The other end of the resistor R65 is connected to one end of a transient suppression diode D16 and one end of a capacitor C54. The other end of the transient suppression diode D16 is connected to one end of the capacitor C54. The other end of the capacitor C53 is connected to the positive electrode of a light-emitting diode LED1. Pin 3 of the relay K1 is connected to pins 40 and 42 of the main control chip. The other ends of pin 3 of the optocoupler U14, the other end of the resistor R59, the other end of the resistor R51, the other end of the capacitor C54, and the negative electrode of the light-emitting diode LED1 are respectively grounded.
[0010] As a preferred solution of the CP signal controller in the present utility model, wherein: Pin 2 of the relay K1 is connected to the drain of an NMOS transistor Q2 and the negative electrode of a diode D1. The positive electrode of the diode D1 and pin 1 of the relay K1 are connected to a 5V voltage. The gate of the NMOS transistor is connected to one end of a resistor R2 and one end of a resistor R4. The other end of the resistor R4 is connected to pin 111 of the main control chip U1. The other end of the resistor R2 and the source of the NMOS transistor are respectively grounded.
[0011] As a preferred solution of the CP signal controller in the present utility model, wherein: It further includes a power conversion circuit. The power conversion circuit converts the input 5V voltage into a 12V voltage for powering the optocoupler U14.
[0012] As a preferred solution of the CP signal controller in the present utility model, wherein: The power conversion circuit includes a voltage conversion chip U13. The 5V voltage is connected to pin 1 of the voltage conversion chip U13. Pin 6 of the voltage conversion chip U13 is connected to one end of a capacitor C46, one end of a capacitor C47, one end of a capacitor C49, and one end of a resistor R53. Pin 4 of the voltage conversion chip U13 is connected to one end of a capacitor C45, one end of a capacitor C48, one end of a capacitor C50, and one end of a resistor R52. The other end of the resistor R53 is connected to one end of a resistor R62. The other end of the resistor R52 is connected to one end of a resistor R61. The other ends of the capacitor C45, the capacitor C48, the capacitor C50, the other end of the capacitor C46, the other end of the capacitor C47, the other end of the capacitor C49, the other end of the resistor R62, and the other end of the resistor R61 are all grounded.
[0013] As a preferred solution for the CP signal controller in the present utility model, the following is included: an indicator light control circuit, which includes light-emitting diodes LED2, LED3, and LED4. The 96th pin of the main control chip U1, the 97th pin of the main control chip U1, and the 98th pin of the main control chip U1 are respectively connected to one end of resistor R7, one end of resistor R3, and one end of resistor R6. The other end of resistor R7 is connected to the gate of PMOS transistor Q4, the other end of resistor R3 is connected to the gate of PMOS transistor Q1, and the other end of resistor R6 is connected to the gate of PMOS transistor Q3. The 3.3V voltage is connected to the source electrodes of PMOS transistor Q4, PMOS transistor Q1, and PMOS transistor Q3. The drain electrode of MOS transistor Q4 and the positive electrode of light-emitting diode LED2 are connected, the drain electrode of PMOS transistor Q1 and the positive electrode of light-emitting diode LED3 are connected, and the drain electrode of PMOS transistor Q3 and the positive electrode of light-emitting diode LED4 are connected. The negative electrodes of light-emitting diode LED2, light-emitting diode LED3, and light-emitting diode LED4 are respectively connected to one end of resistor R9, and the other end of resistor R9 is grounded.
[0014] Compared with the prior art, the present utility model has the following technical effects: Through the structural setting of the CP signal control circuit, the rising edge and falling edge speeds of the PWM signal are significantly improved, avoiding problems such as hysteresis effects and signal distortion that may be caused by slow speed, and further improving the safety and reliability of the charging pile. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:
[0016] Figure 1 It is the main control circuit diagram in the present utility model.
[0017] Figure 2 It is the CP signal control circuit diagram in the present utility model.
[0018] Figure 3 It is the power conversion circuit diagram in the present utility model.
[0019] Figure 4 It is the indicator light control circuit diagram in the present utility model.
[0020] Figure 5 It is the PWM waveform diagram when the 9V state is detected in the present utility model.
[0021] Figure 6This is the PWM waveform diagram in the 6V state detected in the present utility model. Specific embodiments
[0022] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will describe the specific embodiments of the present utility model in detail with reference to the accompanying drawings of the specification.
[0023] In the following description, many specific details are set forth to facilitate a thorough understanding of the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.
[0024] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that can be included in at least one implementation manner of the present utility model. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.
[0025] Embodiment 1
[0026] Referring to Figures 1 to 4 , which is the first embodiment of this application, this embodiment discloses a CP signal controller that can discharge the excess power after the charging pile completes charging, improving the safety of charging.
[0027] A CP signal controller includes a main control circuit and a CP signal control circuit, including a main control chip U1. The peripheral circuit of the main control chip U1 is prior art and will not be elaborated in this application. Refer to Figure 1; The CP signal control circuit includes an optocoupler U14. Pin 1 of the optocoupler U14 is connected to one end of a resistor R47, and the other end of the resistor R47 is connected to pin 4 of a relay K1. Pin 5 of the optocoupler U14 is connected to one end of a resistor R60. The other end of the resistor R60 is connected to the negative electrode of a diode D17 and one end of a resistor R65. The positive electrode of the diode D17 is connected to one end of a resistor R64 and one end of a resistor R59. Pin 35 of the main control chip U1 is connected to one end of a resistor R51. The other end of the resistor R65 is connected to one end of a transient suppression diode D16 and one end of a capacitor C54. The other end of the transient suppression diode D16 is connected to one end of the capacitor C54. The other end of the capacitor C53 is connected to the positive electrode of a light-emitting diode LED1. Pin 2 of the relay K1 is connected to the drain of an NMOS transistor Q2 and the negative electrode of a diode D1. The positive electrode of the diode D1 and pin 1 of the relay K1 are connected to a 5V voltage. The gate of the NMOS transistor is connected to one end of a resistor R2 and one end of a resistor R4. The other end of the resistor R4 is connected to pin 111 of the main control chip U1. Pin 3 of the relay K1 is connected to pins 40 and 42 of the main control chip. Pin 3 of the optocoupler U14, the other end of the resistor R59, the other end of the resistor R51, the other end of the capacitor C54, the negative electrode of the light-emitting diode LED1, the other end of the resistor R2, and the source of the NMOS transistor are respectively grounded.
[0028] One end of the resistor R51 in the CP signal control circuit collects the charging gun CP signal and sends the monitored CP signal to the main control chip U1. The main control chip U1 controls pin 42 to emit a PWM signal according to the monitored CP signal.
[0029] When the charging gun is connected to the in-vehicle unit, since the in-vehicle unit has a voltage-dividing circuit, the CP voltage changes accordingly. The voltage collected by pin 35 of the main control chip U1 adjusts the duty cycle. When the collected CP value is the normal operating voltage, the MAINRELAY port of pin 111 of the main control chip U1 issues a closing command to the relay K1, enabling the charging pile to communicate with the in-vehicle unit and allowing the charging pile to charge the in-vehicle unit. When the collected voltage is other incorrect operating voltages, or the duty cycle of the collected PWM signal is in an abnormal operating state, the main control chip U1 controls the relay K1 to issue a command to disconnect and send the PWM signal, causing the charging pile to stop charging the in-vehicle unit. At the same time, pin 40 of the main control chip U1 collects the PWM signal of pin 42. By combining and verifying the voltage collected by pin 35 of the main control chip U1 and the duty cycle of the collected PWM signal, it can be ensured that when an abnormal charging state occurs, the relay K1 is timely disconnected to stop the transmission of the PWM signal.
[0030] Pin 40 and pin 42 of the main control chip are respectively used as the output and input capture of the PWM signal. The output is for communication with new energy vehicles, and the input is used to determine whether the current PWM is correct. A relay is used to decide whether to connect to optocoupler U14 to ensure that the PWM can be disconnected in time to damage the device in an abnormal state; An LED1 is added to the CP signal control circuit, which can reflect whether the cp has a normal voltage in time. A capacitor C54 is connected in parallel with capacitor C53, which can effectively reduce the output impedance of the circuit, thereby enhancing the signal stability and transmission efficiency, and helping to stabilize the waveform of the PWM signal. By connecting resistors and capacitors in parallel, a low-pass filter can be formed to filter out high-frequency noise in the PWM waveform, thereby obtaining a smoother output signal.
[0031] The main control circuit and the CP control circuit are used in combination. According to the signals collected by the single-chip microcomputer from new energy vehicles, the output form of the corresponding PWM is adjusted. The filtering unit formed by the parallel capacitors C53 and C54 increases the rising and falling edge speeds of the PWM signal within 2 μs. Experimental verification proves the above effects. It also includes a terminal block U2. The positive pole of the LED1 is connected to pin 2 of the terminal block U2; Connect the black clip of channel three of the oscilloscope to the ground, and place the test pen at the CP output (pin 2 of the terminal block U2). According to the communication method with new energy vehicles, use a tester to simulate the vehicle end, with a voltage division of 12V for the 9V charging waiting state and 6V charging state, and send a duty cycle adjustment instruction - a charging instruction through the single-chip microcomputer. At this time, observe the waveform detected by channel three, pause the oscilloscope and read the rising and falling edge times, from Figure 5 It can be seen that in the 9V state, the rising and falling edge response times of the PWM signal are both 2 μs. From Figure 6 It can be seen that in the 6V state, the rising edge response time of the PWM signal is 1 μs, and the falling edge response time is 2 μs; From the above, it can be seen that using the structural setting of the CP signal control circuit in the present utility model can improve the rising and falling edge response speed of the PWM signal, avoid problems such as hysteresis effect and signal distortion that may be caused by slow speed, and further improve the safety and reliability of the charging pile.
[0032] Specifically, it further includes a power conversion circuit which converts the input 5V voltage into a 12V voltage for powering the optocoupler U14. The power conversion circuit includes a voltage conversion chip U13. The 5V voltage is connected to pin 1 of the voltage conversion chip U13. Pin 6 of the voltage conversion chip U13 is connected to one end of capacitor C46, one end of capacitor C47, one end of capacitor C49, and one end of resistor R53. Pin 4 of the voltage conversion chip U13 is connected to one end of capacitor C45, one end of capacitor C48, one end of capacitor C50, and one end of resistor R52. The other end of resistor R53 is connected to one end of resistor R62. The other end of resistor R52 is connected to one end of resistor R61. The other ends of capacitor C45, capacitor C48, capacitor C50, capacitor C46, capacitor C47, capacitor C49, resistor R62, and resistor R61 are all grounded. A 12V voltage is output through the voltage conversion chip U13.
[0033] In this application, the main control chip U1 is preferably a single-chip microcomputer, and its model is STM32F103ZET6. The model of the voltage conversion chip U13 is NN1-12D12BN. A -12V voltage and a +12V voltage are respectively output through pin 4 and pin 6 of the voltage conversion chip U13. Pin 4 of the voltage conversion chip U13 is connected to pin 4 of the relay K1. Pin 6 of the voltage conversion chip U13 is connected to pin 6 of the relay K1 to supply power to the relay K1.
[0034] Embodiment 2
[0035] Referring to Figure 5 , which is the second embodiment of this application. The difference from Embodiment 1 is that this embodiment discloses a CP signal controller which can achieve emergency braking in case of an abnormality.
[0036] Specifically, it further includes an indicator light control circuit. The indicator light control circuit includes light-emitting diodes LED2, LED3, and LED4. The 96th pin, 97th pin, and 98th pin of the main control chip U1 are respectively connected to one end of resistor R7, one end of resistor R3, and one end of resistor R6. The other end of resistor R7 is connected to the gate of PMOS transistor Q4, the other end of resistor R3 is connected to the gate of PMOS transistor Q1, and the other end of resistor R6 is connected to the gate of PMOS transistor Q3. The 3.3V voltage is connected to the source electrodes of PMOS transistor Q4, PMOS transistor Q1, and PMOS transistor Q3. The drain electrode of MOS transistor Q4 is connected to the positive electrode of light-emitting diode LED2, the drain electrode of PMOS transistor Q1 is connected to the positive electrode of light-emitting diode LED3, and the drain electrode of PMOS transistor Q3 is connected to the positive electrode of light-emitting diode LED4. The negative electrodes of light-emitting diode LED2, light-emitting diode LED3, and light-emitting diode LED4 are respectively connected to one end of resistor R9, and the other end of resistor R9 is grounded.
[0037] According to the CP voltage data and the duty cycle of the PWM signal collected by the main control chip U1, when the collected voltage is the operating voltage under normal working conditions, the three-color lamp U15 is controlled to perform green, blue, and red light switching transformations respectively, which is convenient for distinguishing the current working state of the circuit. At the same time, when the collected voltage is other incorrect operating voltages, or the duty cycle of the collected PWM signal is in an abnormal working state, the three-color lamp U15 will present other set phenomena and cooperate with the relay K1 to complete the corresponding countermeasures.
[0038] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.
Claims
1. A CP signal controller, characterized in that: It includes a main control circuit, including a main control chip U1; a CP signal control circuit, the CP signal control circuit includes an optocoupler U14, pin 1 of the optocoupler U14 is connected to one end of a resistor R47, the other end of the resistor R47 is connected to pin 4 of a relay K1, pin 5 of the optocoupler U14 is connected to one end of a resistor R60, the other end of the resistor R60 is connected to the negative electrode of a diode D17 and one end of a resistor R65, the positive electrode of the diode D17 is connected to one end of a resistor R64 and one end of a resistor R59, pin 35 of the main control chip U1 is connected to one end of a resistor R51, the other end of the resistor R65 is connected to one end of a transient suppression diode D16 and one end of a capacitor C54, the other end of the transient suppression diode D16 is connected to one end of the capacitor C54, the other end of the capacitor C53 is connected to the positive electrode of a light-emitting diode LED1, pin 3 of the relay K1, the other end of the resistor R59, the other end of the resistor R51, the other end of the capacitor C54 and the negative electrode of the light-emitting diode LED1 are respectively grounded.
2. The CP signal controller according to claim 1, wherein: Pin 2 of the relay K1 is connected to the drain of an NMOS transistor Q2 and the negative electrode of a diode D1, the positive electrode of the diode D1 and pin 1 of the relay K1 are connected to a 5V voltage, the gate of the NMOS transistor is connected to one end of a resistor R2 and one end of a resistor R4, the other end of the resistor R4 is connected to pin 111 of the main control chip U1, the other end of the resistor R2 and the source of the NMOS transistor are respectively grounded.
3. The CP signal controller according to claim 1 or 2, characterized in that: It also includes a power conversion circuit, and the power conversion circuit converts the input 5V voltage into a 12V voltage for powering the optocoupler U14.
4. The CP signal controller according to claim 3, wherein: The power conversion circuit includes a voltage conversion chip U13, the 5V voltage is connected to pin 1 of the voltage conversion chip U13, pin 6 of the voltage conversion chip U13 is connected to one end of a capacitor C46, one end of a capacitor C47, one end of a capacitor C49 and one end of a resistor R53, pin 4 of the voltage conversion chip U13 is connected to one end of a capacitor C45, one end of a capacitor C48, one end of a capacitor C50 and one end of a resistor R52, the other end of the resistor R53 is connected to one end of a resistor R62, the other end of the resistor R52 is connected to one end of a resistor R61, the other ends of the capacitor C45, the capacitor C48, the capacitor C50, the capacitor C46, the capacitor C47, the capacitor C49, the other end of the resistor R62 and the other end of the resistor R61 are all grounded.
5. The CP signal controller according to claim 1 or 2, characterized in that: It further includes an indicator light control circuit, and the indicator light control circuit includes light-emitting diodes LED2, LED3, and LED4. The 96th pin of the main control chip U1, the 97th pin of the main control chip U1, and the 98th pin of the main control chip U1 are respectively connected to one end of a resistor R7, one end of a resistor R3, and one end of a resistor R6. The other end of the resistor R7 is connected to the gate of a PMOS transistor Q4, the other end of the resistor R3 is connected to the gate of a PMOS transistor Q1, and the other end of the resistor R6 is connected to the gate of a PMOS transistor Q3. A 3.3V voltage is connected to the sources of the PMOS transistors Q4, Q1, and Q3. The drain of the MOS transistor Q4 is connected to the positive electrode of the light-emitting diode LED2, the drain of the PMOS transistor Q1 is connected to the positive electrode of the light-emitting diode LED3, and the drain of the PMOS transistor Q3 is connected to the positive electrode of the light-emitting diode LED4. The negative electrodes of the light-emitting diodes LED2, LED3, and LED4 are respectively connected to one end of a resistor R9, and the other end of the resistor R9 is grounded.