Integrated system of onboard charger and wireless charger, and charging control method

Abstract

An integrated system of an onboard charger and a wireless charger, and a charging control method. The integrated system of the onboard charger and the wireless charger comprises: an onboard charger and wireless charger integrated assembly, and wireless charging ground equipment. The onboard charger and wireless charger integrated assembly comprises a first terminal circuit and a second terminal circuit. The first terminal circuit and the second terminal circuit are connected by means of a transformer onboard receiving coil. The second terminal circuit is shared with a wireless charging onboard device. The first terminal circuit comprises a relay S1 configured to switch current charging modes. If the relay S1 is open, the current charging mode is a wired charging mode, and wired charging of a battery is carried out by means of the first terminal circuit and the second terminal circuit. If the relay S1 is open, the current charging mode is a wireless charging mode, and a transmitting coil of the wireless charging ground equipment and the transformer onboard receiving coil are connected in a contactless mode by means of magnetic field coupling and resonant frequency matching, so as to carry out wireless charging of the battery.

Description

An integrated system and charging control method for an on-board charger and a wireless charger

[0001] This application claims priority to Chinese Patent Application No. 202510375951.5, filed on March 27, 2025, entitled "An Integrated System and Charging Control Method for On-board Charger and Wireless Charger", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This invention relates to the field of charging technology, and in particular to an integrated system and charging control method for an on-board charger and a wireless charger. Background Technology

[0003] Traditional on-board chargers and wireless chargers use independent circuits, including two independent AC (Alternating Current) / DC (Direct Current) rectifier modules, DC / DC boost modules, wireless transmitter coil drivers, and power control modules. This results in a large number of components, large size, high cost, and low charging efficiency. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide an integrated system and charging control method for an on-board charger and a wireless charger, which reduces the number and size of components in the integrated system, lowers costs, and improves charging efficiency.

[0005] On one hand, embodiments of the present invention provide an integrated system for an on-board charger and a wireless charger, including: an integrated assembly of an on-board charger and a wireless charger and a wireless charging ground device; the integrated assembly of the on-board charger and the wireless charger includes a first terminal circuit and a second terminal circuit;

[0006] The first terminal circuit and the second terminal circuit are connected through a transformer vehicle-mounted receiving coil; the first terminal circuit is used for AC rectification, power factor correction, PWM chopping and LC resonance; the second terminal circuit is used for voltage and current adaptation and multiplexing with wireless charging vehicle-mounted devices.

[0007] The first terminal circuit includes a relay S1, which is used to switch the current charging mode. If the relay S1 is closed, the current charging mode is a wired charging mode, and the battery is wired charged through the first terminal circuit and the second terminal circuit. If the relay S1 is open, the current charging mode is a wireless charging mode, and the transmitting coil of the wireless charging ground equipment and the receiving coil of the transformer vehicle are connected non-contactly through magnetic field coupling and resonant frequency matching to wirelessly charge the battery.

[0008] Optionally, the first terminal circuit further includes a plurality of MOSFETs, a plurality of inductors, and a plurality of capacitors, wherein the plurality of MOSFETs include: a first MOSFET Q1, a second MOSFET Q2, a third MOSFET Q3, a fourth MOSFET Q4, a seventh MOSFET Q7, an eighth MOSFET Q8, a ninth MOSFET Q9, and a tenth MOSFET Q10; the plurality of inductors include a first inductor L1 and a third inductor L3; and the plurality of capacitors include: a first capacitor C1, a third capacitor C3, and a fourth capacitor C4.

[0009] The first MOSFET Q1 is connected to the second MOSFET Q2 and the seventh MOSFET Q7. The second MOSFET Q2 is connected to the third inductor L3, the eighth MOSFET Q8, the third capacitor C3, the third MOSFET Q3, and the fourth MOSFET Q4. The seventh MOSFET Q7 is connected to the eighth MOSFET Q8. The third capacitor C3 is connected to the eighth MOSFET Q8, the ninth MOSFET Q9, and the tenth MOSFET Q10. The third MOSFET Q3 is connected to the first inductor L1 and the ninth MOSFET Q9. The fourth MOSFET Q4 is connected to the tenth MOSFET Q10, the fourth capacitor C4, and the relay S1. The first inductor L1 is connected to the fourth capacitor C4 and the first capacitor C1. The first capacitor C1 is connected to the first terminal of the transformer vehicle-mounted receiving coil. The relay S1 is connected to the second terminal of the transformer vehicle-mounted receiving coil.

[0010] Optionally, the second terminal circuit includes an inductor, a plurality of MOSFETs and a plurality of capacitors, wherein the inductor includes a second inductor L2, the plurality of MOSFETs includes a fifth MOSFET Q5, a sixth MOSFET Q6, an eleventh MOSFET Q11 and a twelfth MOSFET Q12, and the plurality of capacitors includes a second capacitor C2, a fifth capacitor C5 and a sixth capacitor C6.

[0011] The fourth terminal of the transformer's on-board receiving coil is connected to the second capacitor C2. The third terminal of the transformer's on-board receiving coil is connected to the sixth capacitor C6, the fifth MOSFET Q5, and the eleventh MOSFET Q11. The second capacitor C2 is connected to the second inductor L2 and the sixth capacitor C6. The second inductor L2 is connected to the sixth MOSFET Q6 and the twelfth MOSFET Q12. The fifth MOSFET Q5 is connected to the sixth MOSFET Q6, the fifth capacitor C5, and the positive terminal VBAT+ of the power supply. The eleventh MOSFET Q11 is connected to the twelfth MOSFET Q12, the fifth capacitor C5, and the negative terminal VBAT- of the power supply.

[0012] Optionally, the wireless charging ground device includes multiple MOSFETs, multiple inductors, and multiple capacitors. The multiple MOSFETs include: thirteenth MOSFET Q13, fourteenth MOSFET Q14, fifteenth MOSFET Q15, sixteenth MOSFET Q16, nineteenth MOSFET Q19, twentieth MOSFET Q20, twenty-first MOSFET Q21, and twenty-second MOSFET Q22. The multiple inductors include fourth inductor L4 and sixth inductor L6. The multiple capacitors include seventh capacitor C7, ninth capacitor C9, and tenth capacitor C10.

[0013] The thirteenth MOSFET Q13 is connected to the fourteenth MOSFET Q14 and the nineteenth MOSFET Q19. The fourteenth MOSFET Q14 is connected to the sixth inductor L6, the twentieth MOSFET Q20, the ninth capacitor C9, the fifteenth MOSFET Q15, and the sixteenth MOSFET Q16. The nineteenth MOSFET Q19 is connected to the twentieth MOSFET Q20. The ninth capacitor C9 is connected to the twentieth MOSFET Q20, the twentieth MOSFET Q21, and the twenty-second MOSFET Q22. The fifteenth MOSFET Q15 is connected to the fourth inductor L4 and the twentieth MOSFET Q21. The sixteenth MOSFET Q16 is connected to the twenty-second MOSFET Q22 and the tenth capacitor C10. The fourth inductor L4 is connected to the tenth capacitor C10 and the seventh capacitor C7. The seventh capacitor C7 and the tenth capacitor C10 are respectively connected to the two ends of the transmitting coil.

[0014] Optionally, the transformer vehicle-mounted receiving coil includes a main coil and a secondary coil, the main coil and the secondary coil share the same magnetic core, and the current charging mode is switched according to the closing and opening of the relay S1.

[0015] On the other hand, embodiments of the present invention provide a charging control method applied to the above-mentioned integrated system of on-board charger and wireless charger, comprising:

[0016] Once the current charging mode is determined, if the current charging mode is wired charging mode, the control relay S1 closes, the on-board charger starts working, the AC / DC converter is started, and DC / DC step-down conversion is performed according to the battery demand to charge the battery.

[0017] If the current charging mode is wireless charging mode, the control relay S1 is disconnected, and the battery is charged through the non-contact connection between the transmitting coil of the wireless charging ground equipment and the on-board receiving coil of the transformer, as well as the DC / DC converter.

[0018] Optionally, if the current charging mode is wireless charging mode, the transformer vehicle-mounted receiving coil converts the received wireless power into DC power, and the output voltage is adjusted by a DC / DC converter to match the battery charging requirements.

[0019] Optionally, if the current charging mode is wired charging mode, when the on-board charger is started, the AC input voltage is converted into DC power through the first terminal circuit, and the battery is charged through the DC / DC converter.

[0020] On the other hand, embodiments of the present invention provide a storage medium including a stored program, wherein the program controls the device where the storage medium is located to execute the above-described charging control method during runtime.

[0021] On the other hand, embodiments of the present invention provide a charging controller, including a memory and a processor. The memory is used to store information including program instructions, and the processor is used to control the execution of the program instructions. When the program instructions are loaded and executed by the processor, the steps of the above-described charging control method are implemented.

[0022] The technical solution provided in this invention includes an integrated system for a vehicle-mounted charger and a wireless charger, comprising: an integrated assembly of the vehicle-mounted charger and the wireless charger, and a wireless charging ground device. The integrated assembly includes a first terminal circuit and a second terminal circuit. The first terminal circuit and the second terminal circuit are connected via a transformer vehicle-mounted receiving coil. The first terminal circuit is used for AC rectification, power factor correction, PWM chopping, and LC resonance. The second terminal circuit is used for voltage and current adaptation and multiplexing with the wireless charging vehicle-mounted device. The first terminal circuit includes a relay S1, which is used to switch the current charging mode. If the relay S1 is closed, the current charging mode is wired charging, and the battery is wired-charged through the first terminal circuit and the second terminal circuit. If the relay S1 is open, the current charging mode is wireless charging, and the transmitting coil of the wireless charging ground device and the transformer vehicle-mounted receiving coil are connected non-contactly through magnetic field coupling and resonant frequency matching to wirelessly charge the battery. The multiplexing of the second terminal circuit of the vehicle-mounted charger and the receiving module circuit of the wireless charging vehicle-mounted device effectively reduces circuit components and circuit size, lowers vehicle costs, and improves charging efficiency. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 is a schematic diagram of an independent control system for an on-board charger and a wireless charger provided in related technologies;

[0025] Figure 2 is a schematic diagram of an integrated system of vehicle-mounted charger and wireless charger provided in an embodiment of the present invention;

[0026] Figure 3 is a schematic diagram of another integrated system of vehicle charger and wireless charger provided in an embodiment of the present invention;

[0027] Figure 4 is a schematic diagram of a transformer vehicle-mounted receiving coil provided in an embodiment of the present invention;

[0028] Figure 5 is a flowchart of a charging control method provided in an embodiment of the present invention;

[0029] Figure 6 is a schematic diagram of a charging controller provided in an embodiment of the present invention. Detailed Implementation

[0030] To better understand the technical solution of the present invention, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0032] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0033] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0034] The related technology provides an independent control system for an on-board charger and a wireless charger. Figure 1 is a schematic diagram of an independent control system for an on-board charger and a wireless charger provided in the related technology. As shown in Figure 1, the system includes: an on-board charger, a wireless charging ground device, and a wireless charging on-board device.

[0035] The on-board charger includes a transformer, multiple metal-oxide-semiconductor (MOS) transistors, multiple inductors, and multiple capacitors. The multiple MOS transistors include: a first MOS transistor Q1, a second MOS transistor Q2, a third MOS transistor Q3, a fourth MOS transistor Q4, a fifth MOS transistor Q5, a sixth MOS transistor Q6, a seventh MOS transistor Q7, an eighth MOS transistor Q8, a ninth MOS transistor Q9, a tenth MOS transistor Q10, an eleventh MOS transistor Q11, and a twelfth MOS transistor Q12. The multiple inductors include a first inductor L1, a second inductor L2, and a third inductor L3. The multiple capacitors include a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6.

[0036] The first MOSFET Q1 is connected to the second MOSFET Q2 and the seventh MOSFET Q7. The second MOSFET Q2 is connected to the third inductor L3, the eighth MOSFET Q8, the third capacitor C3, the third MOSFET Q3, and the fourth MOSFET Q4. The seventh MOSFET Q7 is connected to the eighth MOSFET Q8. The third capacitor C3 is connected to the eighth MOSFET Q8, the ninth MOSFET Q9, and the tenth MOSFET Q10. The third MOSFET Q3 is connected to the first inductor L1 and the ninth MOSFET Q9. The fourth MOSFET Q4 is connected to the tenth MOSFET Q10 and the fourth capacitor C4. The first inductor L1 is connected to the fourth capacitor C4 and the first capacitor C1. Capacitor C1 is connected to the first terminal of the transformer, the fourth capacitor C4 is connected to the second terminal of the transformer, the fourth terminal of the transformer is connected to the second capacitor C2, the third terminal of the transformer is connected to the sixth capacitor C6, the fifth MOSFET Q5, and the eleventh MOSFET Q11, respectively, the second capacitor C2 is connected to the second inductor L2 and the sixth capacitor C6, the second inductor L2 is connected to the sixth MOSFET Q6 and the twelfth MOSFET Q12, the fifth MOSFET Q5 is connected to the sixth MOSFET Q6, the fifth capacitor C5, and the positive terminal VBAT+ of the power supply, and the eleventh MOSFET Q11 is connected to the twelfth MOSFET Q12, the fifth capacitor C5, and the negative terminal VBAT- of the power supply.

[0037] The wireless charging ground equipment includes multiple MOSFETs, multiple inductors, and multiple capacitors. The multiple MOSFETs include: 13th MOSFET Q13, 14th MOSFET Q14, 15th MOSFET Q15, 16th MOSFET Q16, 19th MOSFET Q19, 20th MOSFET Q20, 21st MOSFET Q21, and 22nd MOSFET Q22. The multiple inductors include 4th inductor L4 and 6th inductor L6. The multiple capacitors include: 7th capacitor C7, 9th capacitor C9, and 10th capacitor C10.

[0038] The thirteenth MOSFET Q13 is connected to the fourteenth MOSFET Q14 and the nineteenth MOSFET Q19. The fourteenth MOSFET Q14 is connected to the sixth inductor L6, the twentieth MOSFET Q20, the ninth capacitor C9, the fifteenth MOSFET Q15, and the sixteenth MOSFET Q16. The nineteenth MOSFET Q19 is connected to the twentieth MOSFET Q20. The ninth capacitor C9 is connected to the twentieth MOSFET Q20, the twenty-first MOSFET Q21, and the twenty-second MOSFET Q22. The fifteenth MOSFET Q15 is connected to the fourth inductor L4 and the twenty-first MOSFET Q21. The sixteenth MOSFET Q16 is connected to the twenty-second MOSFET Q22 and the tenth capacitor C10. The fourth inductor L4 is connected to the tenth capacitor C10 and the seventh capacitor C7. The seventh capacitor C7 and the tenth capacitor C10 are connected to the two ends of the transmitting coil.

[0039] The wireless charging vehicle device includes: an inductor, multiple MOSFETs, and multiple capacitors. The inductor includes the fifth inductor L5. The multiple MOSFETs include the seventeenth MOSFET Q17, the eighteenth MOSFET Q18, the twenty-third MOSFET Q23, and the twenty-fourth MOSFET Q24. The multiple capacitors include the eighth capacitor C8, the twelfth capacitor C12, and the eleventh capacitor C11.

[0040] The receiving coil is connected to the eighth capacitor C8. The receiving coil is connected to the eleventh capacitor C11, the seventeenth MOSFET Q17, and the twenty-third MOSFET Q23. The eighth capacitor C8 is connected to the fifth inductor L5 and the eleventh capacitor C11. The fifth inductor L5 is connected to the eighteenth MOSFET Q18 and the twenty-fourth MOSFET Q24. The seventeenth MOSFET Q17 is connected to the eighteenth MOSFET Q18, the twelfth capacitor C12, and the positive terminal VBAT+ of the power supply. The twenty-third MOSFET Q23 is connected to the twenty-fourth MOSFET Q24, the twelfth capacitor C12, and the negative terminal VBAT- of the power supply.

[0041] Electric vehicle on-board chargers and wireless charging devices in related technologies typically use two independent charging modules, each equipped with its own independent control system, power converter, and power adapter. This not only requires more circuit boards and components but also increases system complexity, resulting in a large number of components, large size, high cost, and low charging efficiency.

[0042] To address the technical problems in related technologies, an embodiment of the present invention provides an integrated system for a vehicle-mounted charger and a wireless charger. Through integrated design, two independent charging functions are combined into one assembly, reducing the number of required components and circuit boards, improving power conversion efficiency, reducing system energy loss, making the system simpler and more efficient, reducing hardware redundancy, and simplifying system management. Figure 2 is a schematic diagram of an integrated system for a vehicle-mounted charger and a wireless charger according to an embodiment of the present invention. As shown in Figure 2, the system includes: an integrated assembly 1 for a vehicle-mounted charger and a wireless charger and a wireless charging ground device 2. The integrated assembly 1 for a vehicle-mounted charger and a wireless charger includes a first terminal circuit 11 and a second terminal circuit 12.

[0043] The first terminal circuit 11 and the second terminal circuit 12 are connected through the vehicle-mounted receiving coil 13 of the transformer. The first terminal circuit 11 is used for AC rectification, power factor correction, pulse width modulation (PWM) chopping, and inductor-capacitor (LC) resonance. The second terminal circuit 12 is used for voltage and current adaptation and multiplexing with wireless charging vehicle-mounted equipment.

[0044] The first terminal circuit 11 includes a relay S1, which is used to switch the current charging mode. If the relay S1 is closed, the current charging mode is wired charging mode, and the battery is wired charged through the first terminal circuit 11 and the second terminal circuit 12. If the relay S1 is open, the current charging mode is wireless charging mode, and the transmitting coil 21 of the wireless charging ground device 2 and the transformer vehicle-mounted receiving coil 13 are connected non-contactly through magnetic field coupling and resonant frequency matching to wirelessly charge the battery.

[0045] An embodiment of the present invention provides another vehicle-mounted charger and wireless charger integrated system. Figure 3 is a schematic diagram of another vehicle-mounted charger and wireless charger integrated system provided by an embodiment of the present invention. As shown in Figure 3, the system includes: an integrated assembly of vehicle-mounted charger and wireless charger and a wireless charging ground device. The integrated assembly of vehicle-mounted charger and wireless charger includes a first terminal circuit and a second terminal circuit.

[0046] In this embodiment of the invention, the first terminal circuit includes a power factor correction (PFC) circuit, and the second terminal circuit includes a DC / DC converter.

[0047] In this embodiment of the invention, the first-terminal circuit can be used to convert AC input from the power grid to DC, and improve the power factor to above 0.99 through a PFC circuit, reducing harmonic interference and energy loss. The first-terminal circuit can perform PWM chopping on the DC voltage as needed, and perform LC resonance through a resonant cavity to provide a coupling magnetic field for the second-terminal circuit.

[0048] In this embodiment of the invention, the second-terminal circuit can be used to convert the coupled magnetic field output by the first-terminal circuit into the voltage and current required by the power battery. A high-frequency transformer isolates the input side (grid) from the output side (battery), avoiding common-mode interference and improving system safety. The second-terminal circuit can also be reused with wireless charging vehicle-mounted devices.

[0049] The first terminal circuit includes a relay S1, multiple MOSFETs, multiple inductors, and multiple capacitors. The multiple MOSFETs include: first MOSFET Q1, second MOSFET Q2, third MOSFET Q3, fourth MOSFET Q4, seventh MOSFET Q7, eighth MOSFET Q8, ninth MOSFET Q9, and tenth MOSFET Q10. The multiple inductors include first inductor L1 and third inductor L3. The multiple capacitors include: first capacitor C1, third capacitor C3, and fourth capacitor C4.

[0050] The first MOSFET Q1 is connected to the second MOSFET Q2 and the seventh MOSFET Q7. The second MOSFET Q2 is connected to the third inductor L3, the eighth MOSFET Q8, the third capacitor C3, the third MOSFET Q3, and the fourth MOSFET Q4. The seventh MOSFET Q7 is connected to the eighth MOSFET Q8. The third capacitor C3 is connected to the eighth MOSFET Q8, the ninth MOSFET Q9, and the tenth MOSFET Q10. The third MOSFET Q3 is connected to the first inductor L1 and the ninth MOSFET Q9. The fourth MOSFET Q4 is connected to the tenth MOSFET Q10, the fourth capacitor C4, and the relay S1. The first inductor L1 is connected to the fourth capacitor C4 and the first capacitor C1. The first capacitor C1 is connected to the first terminal of the transformer vehicle-mounted receiving coil. The relay S1 is connected to the second terminal of the transformer vehicle-mounted receiving coil.

[0051] The second-terminal circuit includes an inductor, multiple MOSFETs, and multiple capacitors. The inductor includes a second inductor L2, the multiple MOSFETs include a fifth MOSFET Q5, a sixth MOSFET Q6, an eleventh MOSFET Q11, and a twelfth MOSFET Q12, and the multiple capacitors include a second capacitor C2, a fifth capacitor C5, and a sixth capacitor C6.

[0052] The fourth terminal of the transformer's on-board receiving coil is connected to the second capacitor C2. The third terminal of the transformer's on-board receiving coil is connected to the sixth capacitor C6, the fifth MOSFET Q5, and the eleventh MOSFET Q11. The second capacitor C2 is connected to the second inductor L2 and the sixth capacitor C6. The second inductor L2 is connected to the sixth MOSFET Q6 and the twelfth MOSFET Q12. The fifth MOSFET Q5 is connected to the sixth MOSFET Q6, the fifth capacitor C5, and the positive terminal VBAT+ of the power supply. The eleventh MOSFET Q11 is connected to the twelfth MOSFET Q12, the fifth capacitor C5, and the negative terminal VBAT- of the power supply.

[0053] The wireless charging ground equipment includes multiple MOSFETs, multiple inductors, and multiple capacitors. The multiple MOSFETs include: 13th MOSFET Q13, 14th MOSFET Q14, 15th MOSFET Q15, 16th MOSFET Q16, 19th MOSFET Q19, 20th MOSFET Q20, 21st MOSFET Q21, and 22nd MOSFET Q22. The multiple inductors include 4th inductor L4 and 6th inductor L6. The multiple capacitors include: 7th capacitor C7, 9th capacitor C9, and 10th capacitor C10.

[0054] The thirteenth MOSFET Q13 is connected to the fourteenth MOSFET Q14 and the nineteenth MOSFET Q19. The fourteenth MOSFET Q14 is connected to the sixth inductor L6, the twentieth MOSFET Q20, the ninth capacitor C9, the fifteenth MOSFET Q15, and the sixteenth MOSFET Q16. The nineteenth MOSFET Q19 is connected to the twentieth MOSFET Q20. The ninth capacitor C9 is connected to the twentieth MOSFET Q20, the twenty-first MOSFET Q21, and the twenty-second MOSFET Q22. The fifteenth MOSFET Q15 is connected to the fourth inductor L4 and the twenty-first MOSFET Q21. The sixteenth MOSFET Q16 is connected to the twenty-second MOSFET Q22 and the tenth capacitor C10. The fourth inductor L4 is connected to the tenth capacitor C10 and the seventh capacitor C7. The seventh capacitor C7 and the tenth capacitor C10 are connected to the two ends of the transmitting coil.

[0055] Figure 4 is a schematic diagram of a transformer vehicle-mounted receiving coil according to an embodiment of the present invention. As shown in Figure 4, the transformer vehicle-mounted receiving coil includes a main coil (gray) and a secondary coil (black). The main coil represents the primary winding of the transformer, and the secondary coil represents the secondary winding. The coil has a large area and can be used as a wireless charging vehicle-mounted coil. The main coil and the secondary coil share the same magnetic core. By adding a relay S1 to the primary circuit, the secondary circuit of the vehicle charger and the wireless charging vehicle-mounted device are multiplexed. The current charging mode can be switched according to the closing and opening of the relay S1 to simultaneously meet the needs of wired and wireless charging.

[0056] The technical solution provided in this invention includes an integrated system for a vehicle-mounted charger and a wireless charger, comprising: an integrated assembly of the vehicle-mounted charger and the wireless charger, and a wireless charging ground device. The integrated assembly includes a first terminal circuit and a second terminal circuit. The first terminal circuit and the second terminal circuit are connected via a transformer vehicle-mounted receiving coil. The first terminal circuit is used for AC rectification, power factor correction, PWM chopping, and LC resonance. The second terminal circuit is used for voltage and current adaptation and multiplexing with the wireless charging vehicle-mounted device. The first terminal circuit includes a relay S1, which is used to switch the current charging mode. If the relay S1 is closed, the current charging mode is wired charging, and the battery is wired-charged through the first terminal circuit and the second terminal circuit. If the relay S1 is open, the current charging mode is wireless charging, and the transmitting coil of the wireless charging ground device and the transformer vehicle-mounted receiving coil are connected non-contactly through magnetic field coupling and resonant frequency matching to wirelessly charge the battery. The multiplexing of the second terminal circuit of the vehicle-mounted charger and the receiving module circuit of the wireless charging vehicle-mounted device effectively reduces circuit components and circuit size, lowers vehicle costs, and improves charging efficiency.

[0057] The technical solution provided in this invention integrates the functions of an on-board charger (OBC) and a wireless power charger (WPC) into one unit. Functional integration is achieved through device reuse and topology optimization, reducing system complexity and cost, and improving system integration, charging efficiency, and cost-effectiveness.

[0058] The technical solution provided in this invention integrates the functions of an on-board charger and a wireless charging device on the same circuit board, reducing the number of circuit boards and components and lowering system complexity. The input power of the charger is uniformly regulated by a regulator, enabling adaptation to different types of voltages.

[0059] The technical solution provided in this invention reduces the number of circuit boards, connecting wires and other components, lowers the overall system manufacturing cost, reduces the size of the equipment, and improves system integration.

[0060] Based on the above-mentioned integrated system of on-board charger and wireless charger, an embodiment of the present invention provides a charging control method. Figure 5 is a flowchart of a charging control method provided by an embodiment of the present invention. As shown in Figure 5, the method includes:

[0061] Step 102: Determine the current charging mode. If the current charging mode is wired charging mode, control relay S1 closes, the on-board charger starts working, the AC / DC converter is started, and DC / DC step-down conversion is performed according to the battery demand to charge the battery.

[0062] In this embodiment of the invention, each step is executed by the charging controller. For example, the core of the charging controller consists of a microcontroller unit (MCU) or a digital signal processor (DSP), which is responsible for managing the current charging mode (wired charging mode or wireless charging mode) of the on-board charger, monitoring the system status, controlling the power converter, protecting the safety during the charging process, and performing fault diagnosis.

[0063] In this embodiment of the invention, when the vehicle is started, the MCU can initialize the entire charging system, including detecting the input power, initializing the wireless charging receiver module, starting the power conversion module (AC / DC conversion and DC / DC conversion), and setting the initial operating mode (wired charging mode or wireless charging mode). The MCU can perform a self-test function to check whether all system components are working properly.

[0064] In this embodiment of the invention, when the vehicle connects to a charging pile (CC resistor detected), it will automatically recognize and enter wired charging mode, and the controller will control relay S1 to close. At this time, the on-board charger will operate, and the MCU will start the AC / DC converter and perform DC / DC step-down conversion according to the battery demand. The battery voltage and charging current can be controlled by the MCU to ensure that the charging process complies with safety regulations.

[0065] In this embodiment of the invention, the MCU can control the operating state of the power converter and adjust the input voltage and output current according to the charging mode and battery level to achieve optimal charging efficiency. If the current charging mode is wired charging mode, when the on-board charger is started, the AC input voltage is adjusted by the power factor correction (PFC) circuit in the first terminal circuit and converted into a stable DC power supply, which charges the battery through the DC / DC converter.

[0066] Step 104: If the current charging mode is wireless charging mode, control relay S1 is disconnected, and the battery is charged through the non-contact connection between the transmitting coil of the wireless charging ground equipment and the on-board receiving coil of the transformer, as well as the DC / DC converter.

[0067] In this embodiment of the invention, when the vehicle approaches the wireless charger, the wireless charging receiver unit can identify the wireless signal and automatically switch to wireless charging mode, controlling relay S1 to disconnect. At this time, the MCU will activate the wireless power receiving module and charge the battery through the DC / DC converter.

[0068] In this embodiment of the invention, if the current charging mode is wireless charging mode, the transformer vehicle-mounted receiving coil converts the received wireless power into DC power, and the output voltage is adjusted by a DC / DC converter to match the battery charging requirements.

[0069] In this embodiment of the invention, the MCU can monitor the battery voltage, current, and temperature in real time and obtain battery status information through the Battery Management System (BMS). Based on this status information, the MCU automatically adjusts the charging current and voltage to ensure safety and efficiency during the charging process. When the battery reaches the set target voltage or current, the MCU automatically switches to constant voltage or constant current mode to ensure a smooth charging process. The MCU can also adjust the charging rate based on the battery temperature information to avoid overheating.

[0070] In this embodiment of the invention, the charging control method has multiple safety protection mechanisms. For example, overvoltage protection: the MCU monitors the battery voltage in real time; if the battery voltage exceeds the set range, the MCU will immediately stop charging or adjust the charging voltage to prevent battery overvoltage. Overcurrent protection: if the charging current exceeds the battery's tolerance range, the MCU will automatically reduce the output current or stop charging to prevent overcurrent. Temperature protection: the battery temperature is monitored by a sensor; if the battery temperature is too high, the MCU will reduce the charging current or cut off the charging process. Short circuit protection: if a short circuit or other abnormality is detected, the MCU will quickly stop charging and trigger an alarm mechanism.

[0071] In this embodiment of the invention, during the charging process, the MCU continuously monitors the system's operating status, such as battery voltage, current, temperature, and charger status. If an abnormality occurs, the built-in diagnostic program can identify the fault type and provide alarm information accordingly, ensuring timely handling by the user. Fault information can be provided via a display screen or smartphone, allowing the user to easily view the specific cause of the fault.

[0072] The following describes an implementation method based on the aforementioned integrated system of on-board charger and wireless charger. A high-performance MCU or DSP can be selected to handle tasks, including mode switching, power conversion, charging monitoring, and safety protection. Battery status can be monitored in real time based on battery voltage, current, and temperature sensors to ensure safe charging. The power conversion module may include an AC / DC converter, a DC / DC converter, and a wireless power transfer module (WPT). These modules work together, controlled by the MCU, to complete the conversion and transmission of electrical energy.

[0073] The above charging control method takes into account the power conversion requirements, charging curves, and battery protection strategies under different charging modes. In wireless charging mode, the MCU must comply with the wireless charging protocol to control the frequency, power level, and charging distance of power transmission. Based on real-time battery information, the MCU can adjust the output power to make the charging process both efficient and safe.

[0074] The on-board charger and wireless charger are integrated into a circuit board, with the power conversion module, wireless receiver module, control unit, and other modules interconnected to ensure smooth information flow. Communication protocol: The MCU, BMS, and wireless charging receiver module transmit data via a communication protocol to achieve functions such as charging status monitoring and charging mode switching.

[0075] The technical solution provided in this invention includes an integrated system for a vehicle-mounted charger and a wireless charger, comprising: an integrated assembly of the vehicle-mounted charger and the wireless charger, and a wireless charging ground device. The integrated assembly includes a first terminal circuit and a second terminal circuit. The first terminal circuit and the second terminal circuit are connected via a transformer vehicle-mounted receiving coil. The first terminal circuit is used for AC rectification, power factor correction, PWM chopping, and LC resonance. The second terminal circuit is used for voltage and current adaptation and multiplexing with the wireless charging vehicle-mounted device. The first terminal circuit includes a relay S1, which is used to switch the current charging mode. If the relay S1 is closed, the current charging mode is wired charging, and the battery is wired-charged through the first terminal circuit and the second terminal circuit. If the relay S1 is open, the current charging mode is wireless charging, and the transmitting coil of the wireless charging ground device and the transformer vehicle-mounted receiving coil are connected non-contactly through magnetic field coupling and resonant frequency matching to wirelessly charge the battery. The multiplexing of the second terminal circuit of the vehicle-mounted charger and the receiving module circuit of the wireless charging vehicle-mounted device effectively reduces circuit components and circuit size, lowers vehicle costs, and improves charging efficiency.

[0076] The technical solution provided in this invention utilizes a multi-functional power converter that enables both AC / DC conversion for on-board chargers and wireless power transmission. Circuit optimization of the converter ensures high conversion efficiency and reduces losses.

[0077] The technical solution provided in this invention adopts an integrated control system, which uses an MCU to manage the charging process of the on-board charger and the wireless charger, including automatically switching charging modes, monitoring charging status, and performing safety protection.

[0078] In the technical solution provided by this invention, the wireless charging receiver uses circuitry and control algorithms shared with the on-board charger, further reducing the number of additional components required. The frequency adjustment and power transmission processes of wireless charging are completed by the same control system. This reduces the number of components within the same volume and size, lowers system complexity, effectively improves power conversion efficiency, and reduces energy loss during charging.

[0079] The technical solution provided in this invention adopts an integrated control system to centrally manage on-board charging and wireless charging functions, reducing the complexity and control hardware required to control the two parts separately.

[0080] This invention provides a storage medium that includes a stored program. When the program runs, it controls the device where the storage medium is located to execute the steps of the above-described charging control method. For a detailed description, please refer to the embodiments of the above-described charging control method.

[0081] This invention provides a charging controller, including a memory and a processor. The memory stores information including program instructions, and the processor controls the execution of the program instructions. When the program instructions are loaded and executed by the processor, they implement the steps of the above-described charging control method. For a detailed description, please refer to the embodiments of the above-described charging control method.

[0082] Figure 6 is a schematic diagram of a charging controller provided in an embodiment of the present invention. As shown in Figure 6, the charging controller 20 of this embodiment includes: a processor 21, a memory 22, and a computer program 23 stored in the memory 22 and executable on the processor 21. When the computer program 23 is executed by the processor 21, it implements the charging control method described in the embodiment. To avoid repetition, it will not be described in detail here. Alternatively, when the computer program is executed by the processor 21, it implements the functions of each model / unit in the charging control device described in the embodiment. To avoid repetition, it will not be described in detail here.

[0083] The charging controller 20 includes, but is not limited to, a processor 21 and a memory 22. Those skilled in the art will understand that FIG6 is merely an example of the charging controller 20 and does not constitute a limitation on the charging controller 20. It may include more or fewer components than illustrated, or combine certain components, or use different components. For example, the charging controller may also include input / output devices, network access devices, buses, etc.

[0084] The processor 21 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0085] The memory 22 can be an internal storage unit of the charging controller 20, such as a hard disk or RAM of the charging controller 20. The memory 22 can also be an external storage device of the charging controller 20, such as a plug-in hard disk, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card equipped on the charging controller 20. Furthermore, the memory 22 can include both internal storage units and external storage devices of the charging controller 20. The memory 22 is used to store computer programs and other programs and data required by the charging controller. The memory 22 can also be used to temporarily store data that has been output or will be output.

[0086] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0087] In the embodiments provided by this invention, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between devices or units through some interfaces, and may be electrical, mechanical, or other forms.

[0088] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0089] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or in the form of hardware plus software functional units.

[0090] The integrated units implemented as software functional units described above can be stored in a computer-readable storage medium. These software functional units, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute some steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A system integrating an on-board charger and a wireless charger, characterized in that, include: An integrated assembly of a vehicle-mounted charger and a wireless charger, and a ground-based wireless charging device; the integrated assembly of the vehicle-mounted charger and the wireless charger includes a first terminal circuit and a second terminal circuit. The first terminal circuit and the second terminal circuit are connected through a transformer vehicle-mounted receiving coil; the first terminal circuit is used for AC rectification, power factor correction, PWM chopping and LC resonance; the second terminal circuit is used for voltage and current adaptation and multiplexing with wireless charging vehicle-mounted devices. The first terminal circuit includes a relay S1, which is used to switch the current charging mode. If the relay S1 is closed, the current charging mode is a wired charging mode, and the battery is wired charged through the first terminal circuit and the second terminal circuit. If the relay S1 is open, the current charging mode is a wireless charging mode, and the transmitting coil of the wireless charging ground equipment and the receiving coil of the transformer vehicle are connected non-contactly through magnetic field coupling and resonant frequency matching to wirelessly charge the battery.

2. The system according to claim 1, characterized in that, The first terminal circuit also includes multiple MOSFETs, multiple inductors, and multiple capacitors. The multiple MOSFETs include: a first MOSFET Q1, a second MOSFET Q2, a third MOSFET Q3, a fourth MOSFET Q4, a seventh MOSFET Q7, an eighth MOSFET Q8, a ninth MOSFET Q9, and a tenth MOSFET Q10. The multiple inductors include a first inductor L1 and a third inductor L3. The multiple capacitors include: a first capacitor C1, a third capacitor C3, and a fourth capacitor C4. The first MOSFET Q1 is connected to the second MOSFET Q2 and the seventh MOSFET Q7. The second MOSFET Q2 is connected to the third inductor L3, the eighth MOSFET Q8, the third capacitor C3, the third MOSFET Q3, and the fourth MOSFET Q4. The seventh MOSFET Q7 is connected to the eighth MOSFET Q8. The third capacitor C3 is connected to the eighth MOSFET Q8, the ninth MOSFET Q9, and the tenth MOSFET Q10. The third MOSFET Q3 is connected to the first inductor L1 and the ninth MOSFET Q9. The fourth MOSFET Q4 is connected to the tenth MOSFET Q10, the fourth capacitor C4, and the relay S1. The first inductor L1 is connected to the fourth capacitor C4 and the first capacitor C1. The first capacitor C1 is connected to the first terminal of the transformer vehicle-mounted receiving coil. The relay S1 is connected to the second terminal of the transformer vehicle-mounted receiving coil.

3. The system according to claim 1, characterized in that, The second terminal circuit includes an inductor, multiple MOSFETs, and multiple capacitors. The inductor includes a second inductor L2. The multiple MOSFETs include a fifth MOSFET Q5, a sixth MOSFET Q6, an eleventh MOSFET Q11, and a twelfth MOSFET Q12. The multiple capacitors include a second capacitor C2, a fifth capacitor C5, and a sixth capacitor C6. The fourth terminal of the transformer's on-board receiving coil is connected to the second capacitor C2. The third terminal of the transformer's on-board receiving coil is connected to the sixth capacitor C6, the fifth MOSFET Q5, and the eleventh MOSFET Q11. The second capacitor C2 is connected to the second inductor L2 and the sixth capacitor C6. The second inductor L2 is connected to the sixth MOSFET Q6 and the twelfth MOSFET Q12. The fifth MOSFET Q5 is connected to the sixth MOSFET Q6, the fifth capacitor C5, and the positive terminal VBAT+ of the power supply. The eleventh MOSFET Q11 is connected to the twelfth MOSFET Q12, the fifth capacitor C5, and the negative terminal VBAT- of the power supply.

4. The system according to claim 1, characterized in that, The wireless charging ground device includes multiple MOSFETs, multiple inductors, and multiple capacitors. The multiple MOSFETs include: thirteenth MOSFET Q13, fourteenth MOSFET Q14, fifteenth MOSFET Q15, sixteenth MOSFET Q16, nineteenth MOSFET Q19, twentieth MOSFET Q20, twenty-first MOSFET Q21, and twenty-second MOSFET Q22. The multiple inductors include fourth inductor L4 and sixth inductor L6. The multiple capacitors include seventh capacitor C7, ninth capacitor C9, and tenth capacitor C10. The thirteenth MOSFET Q13 is connected to the fourteenth MOSFET Q14 and the nineteenth MOSFET Q19. The fourteenth MOSFET Q14 is connected to the sixth inductor L6, the twentieth MOSFET Q20, the ninth capacitor C9, the fifteenth MOSFET Q15, and the sixteenth MOSFET Q16. The nineteenth MOSFET Q19 is connected to the twentieth MOSFET Q20. The ninth capacitor C9 is connected to the twentieth MOSFET Q20, the twentieth MOSFET Q21, and the twenty-second MOSFET Q22. The fifteenth MOSFET Q15 is connected to the fourth inductor L4 and the twentieth MOSFET Q21. The sixteenth MOSFET Q16 is connected to the twenty-second MOSFET Q22 and the tenth capacitor C10. The fourth inductor L4 is connected to the tenth capacitor C10 and the seventh capacitor C7. The seventh capacitor C7 and the tenth capacitor C10 are respectively connected to the two ends of the transmitting coil.

5. The system according to claim 1, characterized in that, The transformer vehicle-mounted receiving coil includes a main coil and a secondary coil. The main coil and the secondary coil share the same magnetic core, and the current charging mode is switched according to the closing and opening of the relay S1.

6. A charging control method, applied to the integrated system of on-board charger and wireless charger as described in claim 1, characterized in that, include: Once the current charging mode is determined, if the current charging mode is wired charging mode, the control relay S1 closes, the on-board charger starts working, the AC / DC converter is started, and DC / DC step-down conversion is performed according to the battery demand to charge the battery. If the current charging mode is wireless charging mode, the control relay S1 is disconnected, and the battery is charged through the non-contact connection between the transmitting coil of the wireless charging ground equipment and the on-board receiving coil of the transformer, as well as the DC / DC converter.

7. The method according to claim 6, characterized in that, If the current charging mode is wireless charging, the transformer's on-board receiving coil will convert the received wireless power into DC power, and the output voltage will be adjusted by a DC / DC converter to match the battery charging requirements.

8. The method according to claim 6, characterized in that, If the current charging mode is wired charging mode, when the on-board charger is started, the AC input voltage is converted into DC power through the first terminal circuit, and the battery is charged through the DC / DC converter.

9. A storage medium, characterized in that, The storage medium includes a stored program, wherein, when the program is executed, it controls the device containing the storage medium to perform the charging control method according to any one of claims 6 to 8.

10. A charging controller, comprising a memory and a processor, the memory for storing information including program instructions, and the processor for controlling the execution of the program instructions, characterized in that, When the program instructions are loaded and executed by the processor, they implement the steps of the charging control method according to any one of claims 6 to 8.

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