Power supply device integrated with electric vehicle communication controller and control method thereof

Abstract

The application provides a power supply device integrated with an electric vehicle communication controller and a control method thereof, and relates to the technical field of vehicle charging. The power supply device comprises a DCDC power supply circuit, a communication conversion circuit and a control circuit. The DCDC power supply circuit is used for converting high-voltage electricity of a vehicle power battery into low-voltage electricity and supplying power to the communication conversion circuit. The communication conversion circuit is used for receiving a PLC signal of a non-national standard charging seat and sending the PLC signal to the control circuit. A PLC signal is generated according to a received driving signal, and the PLC signal is sent to the non-national standard charging seat. The control circuit is used for demodulating a PLC signal to generate a CAN signal and sending the CAN signal to a battery management system. The control circuit is used for modulating a CAN signal sent by the battery management system to generate a corresponding driving signal and sending the driving signal to the communication conversion circuit. The power supply device reduces material cost and saves arrangement space.

Description

Technical Field

[0001] This application relates to the field of vehicle charging technology, and in particular to a power supply device and control method for an integrated electric vehicle communication controller. Background Technology

[0002] The charging systems for new energy vehicles (especially pure electric vehicles) need to comply with specific charging standards and communication protocols to ensure the safety and compatibility of the charging process. Currently, there are multiple charging standards worldwide, mainly including national standards and European and American standards. Due to the lack of uniformity between domestic and international standards, domestically produced electric vehicles may face compatibility issues when charging overseas.

[0003] To address this issue, an Electric Vehicle Communication Controller (EVCC) module can be added to the charging system to enable protocol conversion between different standards. The EVCC is a key component of the charging system, primarily responsible for protocol conversion: converting the communication signals from the Battery Management System (BMS) into signals conforming to the charging pile standard (such as the European and American CCS standard); and signal modulation and demodulation: enabling data interaction between the charging pile and the vehicle via Power Line Communication (PLC) technology. There are two main ways to implement the EVCC: one is a standalone setup, where the EVCC hardware circuit is configured separately, including a PLC modem chip and power supply circuit, but this method is costly and requires significant space. The other is an integrated setup, where the PLC communication function is integrated into the Battery Management System (BMS), but this still requires additional PLC chips and power supply circuits, resulting in higher material costs and greater layout space.

[0004] Therefore, there is a need for a solution that can reduce material costs and save layout space by integrating electric vehicle communication control functions. Summary of the Invention

[0005] This application provides a power supply device and control method for integrating an electric vehicle communication controller, which can reduce material costs and save layout space while integrating electric vehicle communication control functions.

[0006] In a first aspect, embodiments of this application provide a power supply device integrating an electric vehicle communication controller, comprising: a DC-DC power supply circuit, a communication conversion circuit, and a control circuit, wherein the DC-DC power supply circuit is connected to the communication conversion circuit, and the control circuit is connected to both the DC-DC power supply circuit and the communication conversion circuit.

[0007] The DC-DC power supply circuit is used to convert the high-voltage electricity of the vehicle's power battery into low-voltage electricity, and to supply power to the communication conversion circuit and the vehicle's low-voltage power supply system respectively.

[0008] The communication conversion circuit is used to receive PLC signals from non-standard charging docks and send the PLC signals to the control circuit; generate PLC signals according to the received drive signals and send the PLC signals to the non-standard charging docks.

[0009] The control circuit is used to demodulate the received PLC signal, generate a corresponding CAN signal, and send the CAN signal to the battery management system; and to modulate the CAN signal sent by the battery management system to generate a corresponding drive signal, and send the drive signal to the communication conversion circuit.

[0010] In one possible implementation, the DC-DC power supply circuit includes: an input capacitor, the primary and secondary sides of a high-frequency transformer, a first power switch, a first diode, and an output capacitor;

[0011] The two ends of the input capacitor are connected to the vehicle's power battery. The same-name end of the primary winding of the high-frequency transformer is connected to the positive terminal of the input capacitor, and the non-same-name end is connected to the non-grounded terminal of the first power switch. The grounded terminal of the first power switch is connected to the negative terminal of the input capacitor.

[0012] The primary and secondary windings of the high-frequency transformer are connected to the negative terminal of the output capacitor, and the non-primary windings are connected to the anode of the first diode. The cathode of the first diode is connected to the positive terminal of the output capacitor, and the two ends of the output capacitor are connected to the vehicle's low-voltage power supply system.

[0013] In one possible implementation, the communication conversion circuit includes: the primary and auxiliary secondary sides of the high-frequency transformer, a second power switch, a second diode, and a DC capacitor;

[0014] The auxiliary secondary winding of the high-frequency transformer is connected to the negative terminal of the DC capacitor at the same-name end and to the anode of the second diode at the non-name end. The cathode of the second diode is connected to the positive terminal of the DC capacitor and the non-grounded terminal of the second power switch, respectively. The grounded terminal of the second power switch is connected to the non-standard charging socket, and the negative terminal of the DC capacitor is grounded.

[0015] In one possible implementation, the control circuit includes: a microcontroller, a sampling and conditioning circuit, and a driving circuit;

[0016] The microcontroller includes a signal conversion module and a pulse modulation module. The sampling and conditioning circuit is connected to the signal conversion module, and the driving circuit is connected to the pulse modulation module.

[0017] The sampling and conditioning circuit is used to acquire the input current of the primary side of the high-frequency transformer and the output voltage of the main and secondary sides of the high-frequency transformer; and to condition the input current and the output voltage to obtain an analog signal of the input current and an analog signal of the output voltage.

[0018] The signal conversion module is used to convert the input current analog signal and the output voltage analog signal into the input current digital signal and the output voltage digital signal;

[0019] The pulse modulation module is used to perform PI control based on the input current digital signal and the output voltage digital signal to obtain the first drive signal of the first power switch.

[0020] The driving circuit is used to drive the first power switch according to the first driving signal, so that the DC-DC power supply circuit adjusts the output voltage according to the driven first power switch.

[0021] In one possible implementation, the control circuit further includes a CAN communication circuit, the microcontroller further includes a communication module, the CAN communication circuit is connected to the communication module, and the communication module is also connected to the pulse modulation module;

[0022] The CAN communication circuit is used to send the CAN signal emitted by the communication module to the battery management system, and to send the CAN signal emitted by the battery management system to the communication module.

[0023] The communication module is used to parse the CAN signal sent by the CAN communication circuit and send the parsed first parsed data to the pulse modulation module; receive the PLC signal sent by the communication conversion circuit and parse the PLC signal to obtain second parsed data; generate the CAN signal corresponding to the second parsed data and send the CAN signal to the CAN communication circuit;

[0024] The pulse modulation module is further configured to generate a second drive signal for the second power switch based on the first parsed data;

[0025] The driving circuit is further configured to drive the second power switch according to the second driving signal, so that the communication conversion circuit generates and outputs a corresponding PLC signal according to the driven second power switch.

[0026] In one possible implementation, the control circuit further includes: an electronic lock control circuit and a signal connection circuit, and the microcontroller further includes an input / output interface module;

[0027] The electronic lock control circuit and the signal connection circuit are respectively connected to the input / output interface module;

[0028] The electronic lock control circuit is used to drive the electronic lock in the non-standard charging dock;

[0029] The signal connection circuit is used to receive the connection confirmation signal from the non-standard charging dock.

[0030] Secondly, embodiments of this application provide a control method for a power supply device based on any one of the first aspects, comprising:

[0031] PI control is performed based on the power supply information of the DC-DC power supply circuit to obtain and output a first drive signal, so that the DC-DC power supply circuit adjusts the output voltage according to the first drive signal. The power supply information includes the input current and output voltage of the DC-DC power supply circuit.

[0032] The PLC modulates the CAN signal sent by the battery management system to obtain and output a second drive signal, so that the communication conversion circuit generates and outputs a corresponding PLC signal according to the second drive signal.

[0033] The received PLC signal is demodulated by the PLC to generate a corresponding CAN signal, which is then sent to the battery management system.

[0034] In one possible implementation, the step of performing PI control based on the power supply information of the DC-DC power supply circuit to obtain and output the first drive signal includes:

[0035] The input current analog signal and output voltage analog signal are obtained from the sampling and conditioning circuit. The input current analog signal is obtained from the input current of the primary side of the high-frequency transformer in the DC-DC power supply circuit, and the output voltage analog signal is obtained from the output voltage of the primary and secondary sides of the high-frequency transformer in the DC-DC power supply circuit.

[0036] The input current analog signal and output voltage analog signal are converted into input current digital signal and output voltage digital signal;

[0037] PI control is performed based on the output voltage digital signal and the preset output voltage reference value to determine the corresponding input current reference value;

[0038] Based on the input current reference value and the input current digital signal, PI control is performed to generate a first signal, and the first signal is modulated with a triangular wave to obtain and output a first drive signal for the first power switch.

[0039] In one possible implementation, the step of PLC modulation based on the CAN signal sent by the battery management system to obtain and output the second drive signal includes:

[0040] The system receives CAN signals sent by the battery management system and performs data parsing on the CAN signals according to the national standard charging communication protocol to obtain the first parsed data.

[0041] According to the non-standard charging communication protocol, the first parsed data is converted into a PWM square wave, and the second drive signal of the second power switch is obtained and output.

[0042] In one possible implementation, the step of demodulating the received PLC signal, generating a corresponding CAN signal, and sending the CAN signal to the battery management system includes:

[0043] The PLC signal sent by the communication conversion circuit is received, and the PLC signal is parsed according to the non-standard charging communication protocol to obtain the second parsed data;

[0044] The second parsed data is converted into a CAN signal according to the national standard charging communication protocol, and the CAN signal is sent to the battery management system.

[0045] This application provides a power supply device and control method for integrating an electric vehicle communication controller. The function of the electric vehicle communication controller can be integrated into the DC-DC power supply device. The DC-DC power supply circuit of the power supply device can simultaneously power the communication conversion circuit and the vehicle's low-voltage power supply system, eliminating the need for an additional power supply circuit. The communication conversion circuit and control circuit can work together to convert between national standard and non-national standard communication protocols, enabling the vehicle to be compatible with non-national charging standards such as European and American CCS and national charging standards, without requiring an additional PLC chip. This setup integrates the functions of each module, avoiding functional redundancy and allowing for shared hardware resources. It eliminates the need to design separate modules for each function or plan installation locations and wiring channels for each independent module. While meeting the communication control requirements of electric vehicles in non-national standard charging scenarios, it significantly reduces material costs and saves layout space. Attached Figure Description

[0046] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0047] Figure 1 This is a schematic diagram of the power supply device for an integrated electric vehicle communication controller according to an embodiment of this application;

[0048] Figure 2 This is a schematic diagram of the structure of a DC-DC power supply circuit and a communication conversion circuit according to an embodiment of this application;

[0049] Figure 3 This is a schematic diagram of the control circuit according to an embodiment of this application;

[0050] Figure 4 This is a flowchart of a control method for a power supply device according to an embodiment of this application;

[0051] Figure 5 This is a schematic diagram of the control process of a power supply device according to an embodiment of this application;

[0052] Figure 6 This is a schematic diagram of the structure of a microcontroller according to an embodiment of this application.

[0053] Figure labels: E, DC-DC power supply circuit; F, communication conversion circuit; H, control circuit; C in Input capacitor; N1, primary side of high-frequency transformer; N2, main and secondary sides of high-frequency transformer; N3, auxiliary secondary side of high-frequency transformer; S1, first power switch; S2, second power switch; D1, first diode; D2, second diode; C o C. Output capacitor; D. DC capacitor;

[0054] 1. Microcontroller; 2. Sampling and conditioning circuit; 3. Driver circuit; 4. CAN communication circuit; 5. Electronic lock control circuit; 6. Signal connection circuit; 11. Signal conversion module; 12. Pulse modulation module; 13. Communication module; 14. Input / output interface module.

[0055] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0056] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0057] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0058] It should be noted that in the embodiments of this application, certain software, components, models and other existing solutions in the industry may be mentioned. These should be regarded as exemplary and are only intended to illustrate the feasibility of implementing the technical solution of this application. However, they do not mean that the applicant has used or necessarily used the solution.

[0059] The power supply device and control method of the integrated electric vehicle communication controller of this application can be used in the field of vehicle charging, or in any other field besides vehicle charging, such as signal processing. The application field of the power supply device and control method of the integrated electric vehicle communication controller of this application is not limited.

[0060] The power supply device and control method of the integrated electric vehicle communication controller of this application can be applied to scenarios where new energy vehicles that meet national standards are charged in Europe and the United States. The power supply device and control method of the integrated electric vehicle communication controller of this application can also be applied to any charging scenario involving new energy vehicles that does not meet national standards.

[0061] First, let me explain the terms used in this application:

[0062] The charging systems for new energy vehicles (especially pure electric vehicles) need to comply with specific charging standards and communication protocols to ensure the safety and compatibility of the charging process. Currently, there are multiple charging standards worldwide, mainly including national standards and European and American standards. Due to the lack of uniformity between domestic and international standards, domestically produced electric vehicles may face compatibility issues when charging overseas.

[0063] To address this issue, an Electric Vehicle Communication Controller (EVCC) module can be added to the charging system to enable protocol conversion between different standards. The EVCC is a key component of the charging system, primarily responsible for protocol conversion: converting the communication signals of the battery management system into signals conforming to the charging pile standard (such as the European and American CCS standard); and signal modulation and demodulation: enabling data interaction between the charging pile and the vehicle through Power Line Communication (PLC) technology.

[0064] In related technologies, there are two main ways to implement EVCC. One is to set it up independently, that is, to configure the EVCC hardware circuit separately, including PLC modem chip, power supply circuit, etc., but this method is costly and occupies a lot of space. The other is to integrate it, which can integrate the PLC communication function into the Battery Management System (BMS), but it still requires additional PLC chip and power supply circuit, and also requires higher material costs and more layout space.

[0065] Based on the above-mentioned technical problems, the inventive concept of this application is: how to provide a solution for integrated electric vehicle communication control function that can reduce material costs and save layout space.

[0066] This application provides a power supply device and control method for integrating an electric vehicle communication controller. The function of the electric vehicle communication controller can be integrated into the DC-DC power supply device. The DC-DC power supply circuit of the power supply device can simultaneously power the communication conversion circuit and the vehicle's low-voltage power supply system, eliminating the need for an additional power supply circuit. The communication conversion circuit and control circuit can work together to convert between national standard and non-national standard communication protocols, enabling the vehicle to be compatible with non-national charging standards such as European and American CCS and national charging standards, without requiring an additional PLC chip. This setup integrates the functions of each module, avoiding functional redundancy and allowing for shared hardware resources. It eliminates the need to design separate modules for each function or plan installation locations and wiring channels for each independent module. While meeting the communication control requirements of electric vehicles in non-national standard charging scenarios, it significantly reduces material costs and saves layout space.

[0067] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0068] Figure 1This is a schematic diagram of the power supply device for an integrated electric vehicle communication controller according to an embodiment of this application, as shown below. Figure 1 As shown, the power supply device may include: a DC-DC power supply circuit E, a communication conversion circuit F, and a control circuit H. The DC-DC power supply circuit E is connected to the communication conversion circuit F, and the control circuit H is connected to both the DC-DC power supply circuit E and the communication conversion circuit F.

[0069] The DC-DC power supply circuit E can be used to convert the high-voltage electricity of the vehicle's power battery into low-voltage electricity, and to supply power to the communication conversion circuit F and the vehicle's low-voltage power supply system, respectively.

[0070] The communication conversion circuit F can be used to receive PLC signals from non-standard charging docks and send the PLC signals to the control circuit H; it can also generate PLC signals based on the received drive signals and send the PLC signals to the non-standard charging docks.

[0071] The control circuit H can be used to demodulate the received PLC signal, generate the corresponding CAN signal, and send the CAN signal to the battery management system; it can also perform PLC modulation on the CAN signal sent by the battery management system to generate the corresponding drive signal and send the drive signal to the communication conversion circuit F.

[0072] In this embodiment, the DC-DC power supply circuit E can be connected to the vehicle's power battery. The DC-DC power supply circuit E may include a high-frequency transformer, which can convert the high-voltage DC power from the vehicle's power battery into low-voltage DC power, and supply power to the communication conversion circuit F and the vehicle's low-voltage power supply system, respectively.

[0073] In this embodiment, the non-standard charging dock can be a charging dock from Europe or the United States that does not conform to the national (charging communication) standard.

[0074] In this embodiment, when the vehicle is connected to a non-standard charging dock, the communication conversion circuit F can receive the PLC signal from the non-standard charging dock and send the PLC signal to the control circuit H. The control circuit H can demodulate the received PLC signal, generate the corresponding CAN signal, and send the CAN signal to the BMS via the CAN transceiver, completing the PLC signal to CAN signal reception conversion.

[0075] In this embodiment, the control circuit H can also receive the CAN signal sent by the battery management system, perform PLC modulation on the CAN signal to generate a corresponding drive signal, and send the drive signal to the communication conversion circuit F. The communication conversion circuit F may include a power switch. By using the drive signal to drive the power switch, a corresponding PLC signal can be generated, and the PLC signal can be sent to the non-standard charging dock, completing the CAN signal to PLC signal transmission conversion.

[0076] In this embodiment, the three core functions of "high voltage to low voltage power supply" (DCDC power supply circuit), "non-standard charging PLC signal interaction" (communication conversion circuit), and "signal modulation and demodulation and collaborative control" (control circuit) can be integrated into one unit. There is no need to design separate independent modules for each function. Hardware resources can be shared, which reduces the amount of non-core materials such as module shells, independent interfaces, redundant connection harnesses, and separate fixing structures. There is also no need to plan installation positions and wiring channels for each independent module, which greatly reduces material costs and saves layout space.

[0077] In this embodiment, the functions of the electric vehicle communication controller can be integrated into the DC-DC power supply unit. The DC-DC power supply circuit of the power supply unit can simultaneously power the communication conversion circuit and the vehicle's low-voltage power supply system, eliminating the need for an additional power supply circuit. The communication conversion circuit and control circuit can work together to convert between national standard and non-national standard communication protocols, enabling the vehicle to be compatible with non-national charging standards such as European and American CCS and national charging standards, without the need for an additional PLC chip. This setup integrates the functions of each module, avoiding functional redundancy and allowing for shared hardware resources. It eliminates the need to design separate modules for each function or plan separate installation locations and wiring channels for each module. While meeting the communication control requirements of electric vehicles in non-national standard charging scenarios, it significantly reduces material costs and saves layout space.

[0078] In one possible implementation, Figure 2 This is a schematic diagram of the structure of a DC-DC power supply circuit and a communication conversion circuit according to an embodiment of this application, as shown below. Figure 2 As shown, the DC-DC power supply circuit E may include: an input capacitor C in The high-frequency transformer consists of the primary side N1 and the secondary side N2, the first power switch S1, the first diode D1, and the output capacitor C. o .

[0079] Input capacitor C in The two ends of the vehicle's power battery V BAT The primary winding N1 of the high-frequency transformer is connected to the input capacitor C. in The positive terminal of the circuit is connected to the non-grounded terminal of the first power switch S1, and the grounded terminal of the first power switch S1 is connected to the input capacitor C. in The negative terminal is connected.

[0080] The primary and secondary windings of the high-frequency transformer, the N2 winding terminals with the same name, and the output capacitor C o The negative terminal is connected to the positive terminal, and the non-identical terminal is connected to the anode of the first diode D1. The cathode of the first diode D1 is connected to the output capacitor C. o The positive terminal is connected, and the output capacitor C oBoth ends are connected to the vehicle's low-voltage power supply system.

[0081] In this embodiment, the first power switch S1 can be a MOSFET power switch, and the control circuit can output a drive signal to drive the first power switch S1, thereby performing closed-loop control of the output voltage.

[0082] In this embodiment, the turns ratio of the primary side N1 and the secondary side N2 of the high-frequency transformer can be flexibly set by those skilled in the art according to actual needs to meet the low-voltage power supply requirements of the vehicle.

[0083] In this embodiment, the primary and secondary sides of the high-frequency transformer, along with the first power switch, form a flyback transformer circuit. This circuit can not only adjust the voltage conversion ratio by adjusting the turns ratio of the primary and secondary sides, but also perform closed-loop control through the first power switch and the output voltage of the circuit, ensuring voltage stability while maintaining adjustable output voltage.

[0084] In one possible implementation, such as Figure 2 As shown, the communication conversion circuit F may include: the primary side N1 and the auxiliary secondary side N3 of a high-frequency transformer, a second power switch S2, a second diode D2, and a DC capacitor C.

[0085] The auxiliary secondary winding N3 of the high-frequency transformer is connected to the negative terminal of the DC capacitor C at the same name terminal and to the anode of the second diode D2 at the non-same name terminal. The cathode of the second diode D2 is connected to the positive terminal of the DC capacitor C and the non-grounded terminal of the second power switch S2. The grounded terminal of the second power switch S2 is connected to the non-standard charging socket. The negative terminal of the DC capacitor C is grounded.

[0086] In this embodiment, such as Figure 2 As shown, i in V is the input current of the primary winding N1 of the high-frequency transformer. o1 The output voltage of the high-frequency transformer N2 is v. o2 The output voltage of the auxiliary secondary side N3 of the high-frequency transformer (which can be converted into a communication signal).

[0087] In this embodiment, the second power switch S2 can be a MOSFET power switch, and the control circuit can output a drive signal to drive the first power switch S2, thereby performing closed-loop control of the output voltage.

[0088] In this embodiment, when receiving a PLC signal from a non-standard charging dock, the signal can be transmitted through the ground terminal of the second power switch S2. After being filtered by the DC capacitor C and limited by the unidirectional conduction of the second diode D2, the signal is effectively transmitted by relying on the coupling characteristics between the auxiliary secondary winding N3 and the primary winding N1 of the high-frequency transformer, providing a stable input for the PLC demodulation of the control circuit.

[0089] In this embodiment, when sending a PLC signal, the drive signal output by the control circuit can be transmitted to the secondary circuit through the coupling between the primary side N1 and the auxiliary secondary side N3 of the high-frequency transformer. After being rectified and filtered by the second diode D2 and the DC capacitor C, it is converted into a PLC signal that can be recognized by the non-standard charging socket by the on / off control of the second power switch S2, thus completing the accurate output of the signal.

[0090] In this embodiment, the unidirectional conduction characteristic of the second diode D2 can effectively prevent the signal from flowing back in reverse and avoid mutual interference between input and output signals; the DC capacitor C can filter out noise and ripple in the PLC signal and ensure the purity of the transmitted signal; at the same time, the multiplexing of the high-frequency transformer realizes signal coupling and isolation, reduces the influence of external electromagnetic interference on the PLC signal, and improves the signal strength, making it not limited by the performance of the power amplifier, thereby improving the transmission distance and anti-interference capability of the PLC signal.

[0091] In this embodiment, the output voltage formed by the primary and auxiliary secondary windings of the high-frequency transformer can power the communication conversion circuit, eliminating the need for an additional power supply circuit, thus significantly reducing material costs and saving layout space. The communication conversion circuit can directly reuse the high-frequency transformer of the DC-DC power supply circuit (achieving its function through its auxiliary secondary winding), eliminating the need for a separate PLC signal coupling / isolation transformer, further reducing material costs while improving signal strength, making it unaffected by power amplifier performance limitations, and increasing the transmission distance and anti-interference capability of the PLC signal. The minimalist component structure and high-frequency transformer reuse design significantly reduce the size of the communication conversion circuit, requiring minimal additional space; simultaneously, the clear circuit topology allows for efficient layout within the same housing as the DC-DC power supply circuit and control circuit, avoiding the space occupation of a separate PLC communication module.

[0092] In one possible implementation, Figure 3 This is a schematic diagram of the control circuit according to an embodiment of this application, as shown below. Figure 3 As shown, the control circuit H may include: a microcontroller 1, a sampling and conditioning circuit 2, and a driving circuit 3.

[0093] The microcontroller 1 may include a signal conversion module 11 and a pulse modulation module 12. The sampling and conditioning circuit 2 is connected to the signal conversion module 11, and the driving circuit 3 is connected to the pulse modulation module 12.

[0094] The sampling and conditioning circuit 2 can be used to acquire the input current on the primary side of the high-frequency transformer and the output voltage on the main and secondary sides of the high-frequency transformer; and to condition the input current and output voltage to obtain the input current analog signal and the output voltage analog signal.

[0095] The signal conversion module 11 can be used to convert the input current analog signal and the output voltage analog signal into the input current digital signal and the output voltage digital signal.

[0096] The pulse modulation module 12 can be used to perform PI control based on the input current digital signal and the output voltage digital signal to obtain the first drive signal of the first power switch.

[0097] The driving circuit 3 can be used to drive the first power switch S1 according to the first driving signal, so that the DC-DC power supply circuit adjusts the output voltage according to the driven first power switch S1.

[0098] In this embodiment, the model of the microcontroller 1 can be flexibly set by those skilled in the art according to actual needs. For example, it can be an STM32, and no restrictions are imposed here.

[0099] In this embodiment, the sampling and conditioning circuit 2 can be connected to a current sensor and a voltage sensor. The current sensor can acquire the input current (analog signal) on the primary side of the high-frequency transformer, and the voltage sensor can acquire the output voltage (analog signal) on the primary and secondary sides of the high-frequency transformer. After acquiring the input current and output voltage, the sampling and conditioning circuit can condition them to obtain the input current analog signal and the output voltage analog signal.

[0100] In this embodiment, the signal conversion module 11 in the microcontroller 1 can convert the input analog signal into a digital signal.

[0101] In this embodiment, the pulse modulation module 12 can perform PI control based on the input current digital signal and the output voltage digital signal, and generate a drive signal for the first power switch by triangular wave modulation.

[0102] In this embodiment, the driving circuit 3 can send (or amplify and send) the driving signal to the DC-DC power supply circuit (the first power switch in the circuit) to perform closed-loop control on the output voltage of the DC-DC power supply circuit.

[0103] In this embodiment, the control circuit constructs a voltage stabilization mechanism for the DC-DC power supply circuit through a closed-loop control link of "sampling and conditioning + signal conversion + PI control + drive execution": the sampling and conditioning circuit collects the primary input current and the main and secondary output voltages of the high-frequency transformer in real time, and provides a clean analog signal after conditioning; the signal conversion module digitizes the analog signal, providing a reliable data foundation for the microcontroller's accurate calculations; the pulse modulation module executes the PI control algorithm based on the digitized data, dynamically generates an appropriate first drive signal, and then drives the first power switch to turn on and off through the drive circuit. Through this closed-loop feedback, the influence of input voltage fluctuations and load changes on the output voltage can be compensated in real time, ensuring the stability of the low-voltage output of the DC-DC power supply circuit and avoiding equipment malfunctions or charging communication interruptions caused by voltage instability.

[0104] In one possible implementation, the control circuit H may also include a CAN communication circuit 4, and the microcontroller 1 may also include a communication module 13. The CAN communication circuit 4 is connected to the communication module 13, and the communication module 13 is also connected to the pulse modulation module 12.

[0105] The CAN communication circuit 4 can be used to send the CAN signal emitted by the communication module 13 to the battery management system, and to send the CAN signal emitted by the battery management system to the communication module 13.

[0106] The communication module 13 can be used to parse the CAN signal sent by the CAN communication circuit 4 and send the parsed first parsed data to the pulse modulation module 12; receive the PLC signal sent by the communication conversion circuit F and parse the PLC signal to obtain the second parsed data; generate the CAN signal corresponding to the second parsed data and send the CAN signal to the CAN communication circuit 4.

[0107] The pulse modulation module 12 can also be used to generate a second drive signal for the second power switch S2 based on the first parsed data.

[0108] The drive circuit 3 can also be used to drive the second power switch S2 according to the second drive signal, so that the communication conversion circuit F generates and outputs the corresponding PLC signal according to the driven second power switch S2.

[0109] In this embodiment, the CAN communication circuit 4 may include a CAN transceiver to realize the reception and transmission of CAN signals.

[0110] In this embodiment, the communication module 13 can parse the CAN signal according to the national standard charging communication protocol GB / T 27930 to obtain the first parsed data. The pulse modulation module 12 can convert the first parsed data into a PWM square wave according to a non-national standard charging communication protocol (such as the European and American CCS charging communication protocol ISO 15118, DIN 70121) to drive the second power switch S2.

[0111] In this embodiment, the communication module 13 can first parse the PLC signal according to a non-standard charging communication protocol (such as the European and American CCS charging communication protocol ISO 15118, DIN 70121) to obtain second parsed data, and then convert the second parsed data into a CAN signal according to the national standard charging communication protocol GB / T 27930, and send the CAN signal to the battery management system.

[0112] In this embodiment, the power amplification and signal shaping functions of the drive circuit 3 can ensure the driving capability and stability of the second drive signal, and avoid PLC signal distortion and transmission interruption caused by insufficient switch drive.

[0113] In this embodiment, a signal interaction channel between the BMS and the non-standard charging dock is established through a CAN communication circuit and a communication module, ensuring smooth cross-system data exchange. On one hand, the communication module receives the PLC signal from the non-standard charging dock transmitted by the communication conversion circuit, parses it to generate a CAN signal recognizable by the BMS, and then sends it to the BMS via the CAN communication circuit, enabling the BMS to obtain the charging dock's operating status in real time. On the other hand, the CAN communication circuit receives the CAN signal sent by the BMS, parses it through the communication module, and transmits it to the pulse modulation module, providing precise data for controlling the communication conversion circuit. The pulse modulation module can generate a second drive signal based on the first parsed data, and then drive the second power switch of the communication conversion circuit to turn on and off through the drive circuit, thereby ensuring precise matching between the PLC signal generated by the communication conversion circuit and the BMS commands.

[0114] In one possible implementation, the control circuit H may further include: an electronic lock control circuit 5 and a signal connection circuit 6, and the microcontroller may also include an input / output interface module 14.

[0115] The electronic lock control circuit 5 and the signal connection circuit 6 are respectively connected to the input / output interface module 14.

[0116] Electronic lock control circuit 5 can be used to drive the electronic lock in non-standard charging docks.

[0117] Signal connection circuit 6 can be used to connect a non-standard charging dock with a connection confirmation signal.

[0118] In this embodiment, through the cooperation of the electronic lock control circuit and the microcontroller input / output interface module, the control circuit can directly drive the electronic lock of the non-standard charging dock. Before charging starts (if the BMS confirms that the charging conditions are met and the communication link is established normally), the microcontroller can send a control signal through the input / output interface module to drive the electronic lock to lock the charging dock and the charging connection components (such as plug and socket) of the vehicle, ensuring a firm physical connection during charging and preventing loosening or detachment of the connection due to vehicle movement or external collisions, thus preventing safety hazards such as arcing and leakage. When charging ends or is abnormally interrupted, the microcontroller can immediately send an unlocking signal to control the electronic lock to unlock, ensuring user operation safety and convenience, and filling the gap in physical connection safety management in non-standard charging scenarios.

[0119] In this embodiment, the signal connection circuit is specifically designed to receive the connection confirmation signal from the non-standard charging dock. This signal can capture the physical connection status between the charging dock and the vehicle in real time (e.g., whether it is properly inserted, whether the connection is stable), and transmit this signal to the microcontroller's input / output interface module. The microcontroller uses this signal to accurately determine whether the charging connection is valid. If a valid connection confirmation signal is detected, subsequent charging communication and power output are allowed. If the connection confirmation signal is lost (e.g., the connection is lost), protective actions such as stopping charging and cutting off related circuits can be triggered immediately. This provides crucial status feedback for the logic control of the entire charging process, ensuring the accuracy and safety of charging control.

[0120] In this embodiment, functions such as DC-DC power supply control, PLC signal interaction, PLC modulation and demodulation, and electronic lock control can all be integrated onto the microcontroller. This can be achieved through shared chips and communication circuits, further reducing material costs and saving layout space. The electronic lock control circuit and signal connection circuit are directly integrated into the control circuit, reusing the microcontroller's input / output interface module resources. There is no need to configure separate lock control modules, connection detection modules, and matching control chips, reducing the number of components and module redundancy, thus lowering material costs and assembly complexity.

[0121] Figure 4 This is a flowchart of a control method for a power supply device according to an embodiment of this application. In this embodiment, the execution subject is... Figure 3 The microcontroller control method for this power supply device is explained. For example... Figure 4 As shown, the control method for this power supply device may include the following steps:

[0122] S401: Perform PI control based on the power supply information of the DC-DC power supply circuit to obtain and output a first drive signal, so that the DC-DC power supply circuit adjusts the output voltage according to the first drive signal.

[0123] In this embodiment, the power supply information may include the input current (input current on the primary side of the high-frequency transformer) and the output voltage (output voltage on the primary and secondary sides of the high-frequency transformer) of the DC-DC power supply circuit.

[0124] In this embodiment, the DC-DC power supply circuit can be connected to the vehicle's power battery. The DC-DC power supply circuit may include a high-frequency transformer, which can convert the high-voltage DC power from the vehicle's power battery into low-voltage DC power, and supply power to the communication conversion circuit and the vehicle's low-voltage power supply system, respectively.

[0125] In this embodiment, the microcontroller can output a first drive signal through the drive circuit to drive the first power switch of the DC-DC power supply circuit, thereby performing closed-loop control of the output voltage.

[0126] In this embodiment, PI control is performed based on the power supply information such as the input current and output voltage of the DC-DC power supply circuit, forming a closed-loop control link of data acquisition, algorithm calculation, drive output, and voltage regulation. By monitoring the input current (reflecting the energy input status on the high-voltage side) and output voltage (directly related to the power supply quality of the low-voltage load) in real time, the PI control algorithm can dynamically correct the parameters of the first drive signal (such as the duty cycle), driving the power switch of the DC-DC power supply circuit to precisely switch on and off. This can quickly compensate for voltage deviations caused by fluctuations in the high-voltage input of the power battery and changes in the vehicle's low-voltage load (communication conversion circuit, vehicle low-voltage equipment), and suppress output voltage ripple, ensuring that the accuracy and stability of the output low-voltage power meet the stringent requirements of the communication conversion circuit, control circuit, and vehicle low-voltage power supply system, avoiding communication interruptions, equipment malfunctions, or charging failures caused by unstable power supply.

[0127] S402: The PLC modulates the CAN signal sent by the battery management system to obtain and output the second drive signal, so that the communication conversion circuit generates and outputs the corresponding PLC signal according to the second drive signal.

[0128] In this embodiment, the microcontroller can receive the CAN signal sent by the battery management system, perform PLC modulation on the CAN signal to generate a corresponding drive signal, and send the drive signal to the communication conversion circuit. The communication conversion circuit may include a second power switch. By using the drive signal to drive the second power switch, a corresponding PLC signal can be generated, and the PLC signal can be sent to the non-standard charging dock, completing the CAN signal to PLC signal transmission conversion.

[0129] S403: Demodulates the received PLC signal, generates the corresponding CAN signal, and sends the CAN signal to the battery management system.

[0130] In this embodiment, when the vehicle is connected to a non-standard charging dock, the communication conversion circuit can receive the PLC signal from the non-standard charging dock and send the PLC signal to the control circuit. The microcontroller in the control circuit can demodulate the received PLC signal, generate the corresponding CAN signal, and send the CAN signal to the BMS via the CAN transceiver, completing the PLC signal-to-CAN signal reception and conversion.

[0131] In this embodiment, the core control functions during vehicle charging (PI power supply regulation, PLC modulation, PLC demodulation) do not require complex and redundant control algorithms or hardware support. They can be integrated into a single control unit (such as a microcontroller), share hardware resources, reduce the configuration of independent control modules, and lower hardware costs and space occupation. At the same time, the directional signal conversion logic (CAN→PLC, PLC→CAN) and precise power supply regulation logic reduce redundant steps in the signal transmission and control process, meeting the communication control requirements of electric vehicles for non-standard charging scenarios.

[0132] In one possible implementation, the step S401 above, which involves performing PI control based on the power supply information of the DC-DC power supply circuit to obtain and output the first drive signal, may include:

[0133] S11: Obtain the input current analog signal and output voltage analog signal from the sampling conditioning circuit. The input current analog signal is obtained from the input current on the primary side of the high-frequency transformer in the DC-DC power supply circuit, and the output voltage analog signal is obtained from the output voltage on the primary and secondary sides of the high-frequency transformer in the DC-DC power supply circuit.

[0134] S12: Converts the analog input current signal and analog output voltage signal into digital input current signal and digital output voltage signal.

[0135] S13: Perform PI control based on the output voltage digital signal and the preset output voltage reference value to determine the corresponding input current reference value.

[0136] S14: Perform PI control based on the input current reference value and the input current digital signal to generate a first signal, and modulate the first signal with a triangular wave to obtain and output the first drive signal of the first power switch.

[0137] In this embodiment, the sampling and conditioning circuit can be connected to a current sensor and a voltage sensor. The current sensor can acquire the input current (analog signal) on the primary side of the high-frequency transformer, and the voltage sensor can acquire the output voltage (analog signal) on the primary and secondary sides of the high-frequency transformer. After acquiring the input current and output voltage, the sampling and conditioning circuit can condition them to obtain the input current analog signal and the output voltage analog signal.

[0138] In this embodiment, the output voltage digital signal and the preset output voltage reference value v are compared. 01-ref The difference between the two values, after passing through a PI controller, yields the input current reference value i. L-ref Then, the input current reference value i L-ref The difference between the input current digital signal and the output current signal is processed by the P controller and modulated with a triangular wave to generate the drive signal for the first power switch, thereby realizing the dual closed-loop control of the DC-DC power supply circuit.

[0139] In this embodiment, the preset output voltage reference value can be flexibly set by those skilled in the art according to actual conditions, and no restrictions are imposed here.

[0140] In this embodiment, a voltage stabilization mechanism for the DC-DC power supply circuit is constructed through a closed-loop control chain of "sampling and conditioning + signal conversion + PI control + drive execution": the sampling and conditioning circuit collects the primary input current and the main and secondary output voltages of the high-frequency transformer in real time, and provides a clean analog signal after conditioning; the signal conversion module digitizes the analog signal, providing a reliable data foundation for the microcontroller's accurate calculations; the pulse modulation module executes the PI control algorithm based on the digitized data, dynamically generates an appropriate first drive signal, and then drives the first power switch to turn on and off through the drive circuit. Through this closed-loop feedback, the influence of input voltage fluctuations and load changes on the output voltage can be compensated in real time, ensuring the stability of the low-voltage output of the DC-DC power supply circuit and avoiding equipment malfunctions or charging communication interruptions caused by voltage instability.

[0141] In one possible implementation, step S402 above, which modulates the CAN signal sent by the battery management system using a PLC to obtain and output the second drive signal, may include:

[0142] S21: Receive the CAN signal sent by the battery management system, and parse the CAN signal according to the national standard charging communication protocol to obtain the first parsed data;

[0143] S22: Convert the first parsed data into a PWM square wave according to the non-standard charging communication protocol, and obtain and output the second drive signal of the second power switch.

[0144] In this embodiment, the CAN signal can first be parsed according to the national standard charging communication protocol GB / T 27930 to obtain the first parsed data. Then, the first parsed data can be converted into a PWM square wave according to a non-national standard charging communication protocol (such as the European and American CCS charging communication protocol ISO15118, DIN 70121) to drive the second power switch.

[0145] In this embodiment, the two-step logic of parsing the national standard protocol and converting to a non-national standard protocol precisely solves the problem of protocol differences between the CAN communication of the battery management system and the PLC communication of the non-national standard charging dock: The first step is to parse the CAN signal sent by the BMS according to the national standard charging communication protocol to ensure accurate extraction of the core instructions of the BMS and avoid misreading of instructions due to protocol incompatibility; The second step is to convert the parsed data into a second drive signal in the form of a PWM square wave according to the non-national standard charging communication protocol. The converted second drive signal is output in the form of a PWM square wave, and its frequency, duty cycle and other parameters strictly match the requirements of the non-national standard charging communication protocol. It can directly drive the second power switch of the communication conversion circuit to accurately turn on and off, ensuring that the PLC signal generated by the communication conversion circuit is completely compatible with the receiving standard of the non-national standard charging dock, ensuring that the BMS instructions can be accurately transmitted to the non-national standard charging dock, and ensuring the precise execution of key actions such as charging start, power adjustment and stop.

[0146] In one possible implementation, step S403 above, which involves demodulating the received PLC signal to generate a corresponding CAN signal and sending the CAN signal to the battery management system, may include:

[0147] S31: Receives the PLC signal sent by the communication conversion circuit, and parses the PLC signal according to the non-standard charging communication protocol to obtain the second parsed data.

[0148] S32: Convert the second parsed data into a CAN signal according to the national standard charging communication protocol, and send the CAN signal to the battery management system.

[0149] In this embodiment, the PLC signal can first be parsed according to a non-standard charging communication protocol (such as the European and American CCS charging communication protocol ISO 15118, DIN 70121) to obtain the second parsed data. Then, the second parsed data can be converted into a CAN signal according to the national standard charging communication protocol GB / T 27930, and the CAN signal can be sent to the battery management system.

[0150] In this embodiment, the status feedback channel between the non-standard charging dock and the standard BMS is perfectly connected through the reverse logic of non-standard protocol parsing and standard protocol conversion: First, the PLC signal is parsed according to the non-standard charging communication protocol to accurately extract the core status data of the charging dock and avoid misreading of status due to the diversity of non-standard protocols; Second, the parsed data is converted into a CAN signal that can be recognized by the BMS and transmitted back according to the standard charging communication protocol, filling the technical gap that the status of the non-standard charging dock cannot be directly fed back to the standard BMS, and constructing a complete charging control feedback closed loop. The parsing and conversion process strictly follows the corresponding protocol specifications to ensure the integrity of the second parsed data and the accuracy of the CAN signal.

[0151] The application process of the power supply device of the integrated electric vehicle communication controller of this application will be described below with a specific embodiment.

[0152] In one specific embodiment, the power supply device for the integrated electric vehicle communication controller includes: a DC-DC power supply circuit E, a communication conversion circuit F, and a control circuit H. Figure 5 This is a schematic diagram of the control process of a power supply device according to an embodiment of this application, as shown below. Figure 5 As shown:

[0153] The DC-DC power supply circuit E includes: input capacitor C in The high-frequency transformer consists of the primary side N1 and the secondary side N2, the first power switch S1, the first diode D1, and the output capacitor C. o .

[0154] Input capacitor C in The two ends of the vehicle's power battery V BAT The primary winding N1 of the high-frequency transformer is connected to the input capacitor C. in The positive terminal of the circuit is connected to the non-grounded terminal of the first power switch S1, and the grounded terminal of the first power switch S1 is connected to the input capacitor C. in The negative terminal is connected.

[0155] The primary and secondary windings of the high-frequency transformer, the N2 winding terminals with the same name, and the output capacitor C o The negative terminal is connected to the positive terminal, and the non-identical terminal is connected to the anode of the first diode D1. The cathode of the first diode D1 is connected to the output capacitor C. o The positive terminal is connected, and the output capacitor C o Both ends are connected to the vehicle's low-voltage power supply system.

[0156] The communication conversion circuit F includes: the primary side N1 and the auxiliary secondary side N3 of the high-frequency transformer, the second power switch S2, the second diode D2, and the DC capacitor C.

[0157] The auxiliary secondary winding N3 of the high-frequency transformer is connected to the negative terminal of the DC capacitor C at the same name terminal and to the anode of the second diode D2 at the non-same name terminal. The cathode of the second diode D2 is connected to the positive terminal of the DC capacitor C and the non-grounded terminal of the second power switch S2. The grounded terminal of the second power switch S2 is connected to the non-standard charging socket. The negative terminal of the DC capacitor C is grounded.

[0158] The control circuit H includes: a microcontroller 1, a sampling and conditioning circuit 2, a drive circuit 3, a CAN communication circuit 4, an electronic lock control circuit 5, and a signal connection circuit 6.

[0159] The microcontroller 1 includes a signal conversion module 11, a pulse modulation module 12, a communication module 13, and an input / output interface module 14.

[0160] The sampling and conditioning circuit 2 is connected to the current sensor and the voltage sensor. The sampling and conditioning circuit 2 is also connected to the signal conversion module 11. The driving circuit 3 is connected to the pulse modulation module 12. The pulse modulation module 12 is connected to the signal conversion module 11 and the communication module 13 respectively. The input and output interface module 14 is connected to the electronic lock control circuit 5 and the signal connection circuit 6 respectively.

[0161] Sampling and conditioning circuit 2 is used to collect the input current on the primary side of the high-frequency transformer and the output voltage on the main and secondary sides of the high-frequency transformer; it conditions the input current and output voltage to obtain analog signals of input current and output voltage.

[0162] The signal conversion module 11 is used to convert the input current analog signal and the output voltage analog signal into the input current digital signal and the output voltage digital signal.

[0163] The pulse modulation module 12 is used to perform PI control based on the input current digital signal and the output voltage digital signal to obtain the first drive signal of the first power switch.

[0164] The driving circuit 3 is used to drive the first power switch S1 according to the first driving signal, so that the DC-DC power supply circuit adjusts the output voltage according to the driven first power switch S1.

[0165] The communication module 13 is used to parse the CAN signal sent by the CAN communication circuit 4 and send the parsed first parsed data to the pulse modulation module 12; receive the PLC signal sent by the communication conversion circuit F and parse the PLC signal to obtain the second parsed data; generate the CAN signal corresponding to the second parsed data and send the CAN signal to the CAN communication circuit 4.

[0166] The pulse modulation module 12 is also used to generate a second drive signal for the second power switch S2 based on the first parsed data.

[0167] The drive circuit 3 is also used to drive the second power switch S2 according to the second drive signal, so that the communication conversion circuit F generates and outputs the corresponding PLC signal according to the driven second power switch S2.

[0168] Electronic lock control circuit 5 can be used to drive the electronic lock in non-standard charging docks.

[0169] Signal connection circuit 6 can be used to connect a non-standard charging dock with a connection confirmation signal.

[0170] like Figure 5 As shown, the specific control process of the microcontroller is as follows:

[0171] (a) Voltage control of DC-DC power supply circuit:

[0172] ① Obtain the input current analog signal and output voltage analog signal from the sampling and conditioning circuit. The input current analog signal is obtained from the input current on the primary side of the high-frequency transformer in the DC-DC power supply circuit, and the output voltage analog signal is obtained from the output voltage on the primary and secondary sides of the high-frequency transformer in the DC-DC power supply circuit.

[0173] ② Convert the analog input current signal and analog output voltage signal into digital input current signal and digital output voltage signal.

[0174] ③ Perform PI control based on the output voltage digital signal and the preset output voltage reference value to determine the corresponding input current reference value.

[0175] ④ Perform PI control based on the input current reference value and the input current digital signal to generate a first signal, and modulate the first signal with a triangular wave to obtain and output the first drive signal of the first power switch.

[0176] (ii) PLC modulation control:

[0177] ① Receive the CAN signal sent by the battery management system, and parse the CAN signal according to the national standard charging communication protocol to obtain the first parsed data;

[0178] ② The first parsed data is converted into a PWM square wave according to the non-standard charging communication protocol, and the second drive signal of the second power switch is obtained and output.

[0179] (II) PLC demodulation control:

[0180] ①S31: Receives the PLC signal sent by the communication conversion circuit, and parses the PLC signal according to the non-standard charging communication protocol to obtain the second parsed data.

[0181] ②S32: Convert the second parsed data into a CAN signal according to the national standard charging communication protocol, and send the CAN signal to the battery management system.

[0182] Figure 6 This is a schematic diagram of the structure of a microcontroller according to an embodiment of this application, as shown below. Figure 6 As shown, the microcontroller includes a processor 601 and a memory 602 communicatively connected to the processor 601; the memory 602 stores computer-executable instructions; the processor 601 executes the computer-executable instructions stored in the memory 602 to implement the steps of the power supply device control method in the above-described method embodiments.

[0183] In the aforementioned microcontroller, the memory 602 and the processor 601 are electrically connected directly or indirectly to achieve data transmission or interaction. For example, these components can be electrically connected to each other through one or more communication buses or signal lines, such as a bus connection. The memory 602 stores computer-executable instructions that implement data access control methods, including at least one software function module that can be stored in the memory 602 in the form of software or firmware. The processor 601 executes various functional applications and data processing by running the software program and module stored in the memory 602.

[0184] The memory 602 may be, but is not limited to, Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), etc. The memory 602 stores programs, which are executed by the processor 601 upon receiving execution instructions. Furthermore, the software programs and modules within the memory 602 may include an operating system, which may include various software components and / or drivers for managing system tasks (e.g., memory management, storage device control, power management, etc.) and can communicate with various hardware or software components to provide an operating environment for other software components.

[0185] Processor 601 can be an integrated circuit chip with signal processing capabilities. The aforementioned processor 601 can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor.

[0186] An embodiment of this application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the steps of the various method embodiments of this application.

[0187] An embodiment of this application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the various method embodiments of this application.

[0188] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0189] It should be further noted that although the steps in the flowchart are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowchart may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0190] It should be understood that the above-described device embodiments are merely illustrative, and the device of this application can also be implemented in other ways. For example, the division of units / modules in the above embodiments is only a logical functional division, and there may be other division methods in actual implementation. For example, multiple units, modules, or components may be combined, or integrated into another system, or some features may be ignored or not executed.

[0191] Furthermore, unless otherwise specified, the functional units / modules in the various embodiments of this application can be integrated into one unit / module, or each unit / module can exist physically separately, or two or more units / modules can be integrated together. The integrated units / modules described above can be implemented in hardware or as software program modules.

[0192] In the above embodiments, the descriptions of each embodiment have their own emphasis. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification.

[0193] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the appended claims.

[0194] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A power supply device integrating an electric vehicle communication controller, characterized in that, include: The system includes a DC-DC power supply circuit, a communication conversion circuit, and a control circuit. The DC-DC power supply circuit is connected to the communication conversion circuit, and the control circuit is connected to both the DC-DC power supply circuit and the communication conversion circuit. The DC-DC power supply circuit is used to convert the high-voltage electricity of the vehicle's power battery into low-voltage electricity, and to supply power to the communication conversion circuit and the vehicle's low-voltage power supply system respectively. The communication conversion circuit is used to receive PLC signals from non-standard charging docks and send the PLC signals to the control circuit; generate PLC signals according to the received drive signals and send the PLC signals to the non-standard charging docks. The control circuit is used to demodulate the received PLC signal, generate a corresponding CAN signal, and send the CAN signal to the battery management system; and to modulate the CAN signal sent by the battery management system to generate a corresponding drive signal, and send the drive signal to the communication conversion circuit. The DC-DC power supply circuit includes: an input capacitor, the primary and secondary sides of a high-frequency transformer, a first power switch, a first diode, and an output capacitor; The two ends of the input capacitor are connected to the vehicle's power battery. The same-name end of the primary winding of the high-frequency transformer is connected to the positive terminal of the input capacitor, and the non-same-name end is connected to the non-grounded terminal of the first power switch. The grounded terminal of the first power switch is connected to the negative terminal of the input capacitor. The same-name terminals of the primary and secondary windings of the high-frequency transformer are connected to the negative terminal of the output capacitor, and the non-same-name terminals are connected to the anode of the first diode. The cathode of the first diode is connected to the positive terminal of the output capacitor, and the two ends of the output capacitor are connected to the vehicle's low-voltage power supply system. The communication conversion circuit includes: the primary and auxiliary secondary sides of the high-frequency transformer, a second power switch, a second diode, and a DC capacitor; The auxiliary secondary winding of the high-frequency transformer has its corresponding terminal connected to the negative terminal of the DC capacitor, and its non-corresponding terminal connected to the anode of the second diode. The cathode of the second diode is connected to the positive terminal of the DC capacitor and the non-grounded terminal of the second power switch. The grounded terminal of the second power switch is connected to the non-standard charging socket. The negative terminal of the DC capacitor is grounded.

2. The power supply device for the integrated electric vehicle communication controller according to claim 1, characterized in that, The control circuit includes: a microcontroller, a sampling and conditioning circuit, and a drive circuit; The microcontroller includes a signal conversion module and a pulse modulation module. The sampling and conditioning circuit is connected to the signal conversion module, and the driving circuit is connected to the pulse modulation module. The sampling and conditioning circuit is used to acquire the input current on the primary side of the high-frequency transformer and the output voltage on the main and secondary sides of the high-frequency transformer; and to condition the input current and the output voltage to obtain an analog input current signal and an analog output voltage signal. The signal conversion module is used to convert the input current analog signal and the output voltage analog signal into the input current digital signal and the output voltage digital signal; The pulse modulation module is used to perform PI control based on the input current digital signal and the output voltage digital signal to obtain the first drive signal of the first power switch. The driving circuit is used to drive the first power switch according to the first driving signal, so that the DC-DC power supply circuit adjusts the output voltage according to the driven first power switch.

3. The power supply device for the integrated electric vehicle communication controller according to claim 2, characterized in that, The control circuit also includes a CAN communication circuit, and the microcontroller also includes a communication module. The CAN communication circuit is connected to the communication module, and the communication module is also connected to the pulse modulation module. The CAN communication circuit is used to send the CAN signal emitted by the communication module to the battery management system, and to send the CAN signal emitted by the battery management system to the communication module. The communication module is used to parse the CAN signal sent by the CAN communication circuit and send the parsed first parsed data to the pulse modulation module; receive the PLC signal sent by the communication conversion circuit and parse the PLC signal to obtain second parsed data; generate the CAN signal corresponding to the second parsed data and send the CAN signal to the CAN communication circuit; The pulse modulation module is further configured to generate a second drive signal for the second power switch based on the first parsed data; The driving circuit is further configured to drive the second power switch according to the second driving signal, so that the communication conversion circuit generates and outputs a corresponding PLC signal according to the driven second power switch.

4. The power supply device for the integrated electric vehicle communication controller according to claim 3, characterized in that, The control circuit also includes an electronic lock control circuit and a signal connection circuit, and the microcontroller also includes an input / output interface module. The electronic lock control circuit and the signal connection circuit are respectively connected to the input / output interface module; The electronic lock control circuit is used to drive the electronic lock in the non-standard charging dock; The signal connection circuit is used to receive the connection confirmation signal from the non-standard charging dock.

5. A control method for a power supply device as described in any one of claims 1-4, characterized in that, include: PI control is performed based on the power supply information of the DC-DC power supply circuit to obtain and output a first drive signal, so that the DC-DC power supply circuit adjusts the output voltage according to the first drive signal. The power supply information includes the input current and output voltage of the DC-DC power supply circuit. The PLC modulates the CAN signal sent by the battery management system to obtain and output a second drive signal, so that the communication conversion circuit generates and outputs a corresponding PLC signal according to the second drive signal. The received PLC signal is demodulated by the PLC to generate a corresponding CAN signal, which is then sent to the battery management system.

6. The control method for the power supply device according to claim 5, characterized in that, The step of performing PI control based on the power supply information of the DC-DC power supply circuit to obtain and output the first drive signal includes: The input current analog signal and output voltage analog signal are obtained from the sampling and conditioning circuit. The input current analog signal is obtained from the input current of the primary side of the high-frequency transformer in the DC-DC power supply circuit, and the output voltage analog signal is obtained from the output voltage of the primary and secondary sides of the high-frequency transformer in the DC-DC power supply circuit. The input current analog signal and output voltage analog signal are converted into input current digital signal and output voltage digital signal; PI control is performed based on the output voltage digital signal and the preset output voltage reference value to determine the corresponding input current reference value; Based on the input current reference value and the input current digital signal, PI control is performed to generate a first signal, and the first signal is modulated with a triangular wave to obtain and output a first drive signal for the first power switch.

7. The control method for the power supply device according to claim 5, characterized in that, The step of modulating the CAN signal sent by the battery management system using a PLC to obtain and output the second drive signal includes: The system receives CAN signals sent by the battery management system and performs data parsing on the CAN signals according to the national standard charging communication protocol to obtain the first parsed data. According to the non-standard charging communication protocol, the first parsed data is converted into a PWM square wave, and the second drive signal of the second power switch is obtained and output.

8. The control method for the power supply device according to claim 7, characterized in that, The step of demodulating the received PLC signal, generating a corresponding CAN signal, and sending the CAN signal to the battery management system includes: The PLC signal sent by the communication conversion circuit is received, and the PLC signal is parsed according to the non-standard charging communication protocol to obtain the second parsed data; The second parsed data is converted into a CAN signal according to the national standard charging communication protocol, and the CAN signal is sent to the battery management system.

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