Embedded small-size intelligent rapid charger and control method thereof
Through the embedded design of three-phase power supply and multi-stage power conversion circuit, combined with intelligent charging identification and protection circuit, the problems of slow charging speed and large size of traditional chargers are solved, and a miniaturized and efficient fast charger is realized to meet the charging needs of various devices.
Patent Information
- Application Number
- CN202510491025.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-18
- Publication Date
- 2025-07-25
AI Technical Summary
Traditional chargers have slow charging speed and large equipment, making it difficult to meet the fast charging needs of modern smart devices.
It adopts three-phase power supply and multi-stage power conversion circuit, combined with intelligent charging identification and protection circuit, and through PWM drive signal switch and adaptive zero voltage switching technology, efficient power conversion and safe isolation are achieved, supporting multiple voltage outputs, and adapting to the charging needs of different devices.
It realizes a miniaturized and efficient charger design, has good compatibility, can quickly charge and adapt to a variety of devices, improving user convenience and aesthetics.
Smart Images
Figure CN120377447A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of charging devices, and more particularly, to an embedded small-sized intelligent fast charger and its control method. Background Art
[0002] In recent years, with the development of information technology and the change of market demand, and the popularization of technologies such as smart home and Internet of Things, small-sized and lightweight power charger products are more popular in the market. At present, embedded power supplies not only have a significant improvement in conversion efficiency and safety, but also the market demand continues to grow.
[0003] With the development of technology, people use more and more types of intelligent devices. As the number and frequency of use of intelligent mobile devices increase, the requirements for device battery life and charging are getting higher and higher, and charging difficulties have become the biggest problem restricting the use of devices. Conventional public chargers in public places have a small charging power, a slow charging speed, a large device volume, and a limited installation quantity. Summary of the Invention
[0004] In order to overcome the problems of slow charging speed and large device volume in the prior art, the present invention provides an embedded small-sized intelligent fast charger and its control method with the advantages of high charging efficiency and small volume.
[0005] An embedded small-sized intelligent fast charger and its control method of the present invention includes a three-phase power supply and a power conversion circuit 1 electrically connected to the three-phase power supply. One side of the power conversion circuit 1 is provided with a power conversion circuit 2, and the other side of the power conversion circuit 2 is provided with an intelligent charging identification circuit. The other side of the intelligent charging identification circuit is provided with a protection circuit. The input end of the power conversion circuit 1 is electrically connected to the output end of the three-phase power supply, the output end of the power conversion circuit 1 is electrically connected to the input end of the power conversion circuit 2, the output end of the power conversion circuit 2 is electrically connected to the input end of the intelligent charging identification circuit, and the output end of the intelligent charging identification circuit is electrically connected to the input end of the protection circuit.
[0006] Preferably, the power conversion circuit 1 includes a power supply port AC, a chip U1, a transformer LF1, an inductor L1, a transformer T1, a rectifier bridge BD1, a rectifier bridge BD2, a fuse F1, fuses FB1, FB2, a triode Q1, a MOS transistor Q2, resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, R23, R24, R25, R26, R27, capacitors C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, C17, C18, capacitors CX1, CY1, polarized capacitors EC1, EC2, EC3, EC4, EC5, EC6, a zener diode ZD1, diodes D1, D2, D3, D4, D5, and D6. The 1-pin of the power supply port AC is electrically connected to the 3-pin of the transformer LF1. The 2-pin of the transformer LF1 is electrically connected to one end of the fuse F1. The other end of the fuse F1 is electrically connected to the 2-pin of the power supply port AC. The 4-pin of the transformer LF1 is electrically connected to one end of the capacitor CX1, one end of the resistor R1, the positive pole of the diode D4, the 2-pin of the rectifier bridge BD1, and the 3-pin of the rectifier bridge BD1. The 1-pin of the transformer LF1 is electrically connected to the other end of the capacitor CX1, the positive pole of the diode D3, one end of the resistor R2, the 2-pin of the rectifier bridge BD2, and the 3-pin of the rectifier bridge BD1. The other ends of the resistor R1 and the resistor R2 are electrically connected. The negative pole of the diode D4 is electrically connected to the negative pole of the diode D3 and one end of the resistor R26. The other end of the resistor R26 is electrically connected to one end of the resistor R27. The other end of the resistor R27 is electrically connected to the 1-pin of the chip U1. The 4-pin of the rectifier bridge BD1 is electrically connected to the 4-pin of the rectifier bridge BD2. The 4-pin of the rectifier bridge BD1 is grounded. The 1-pin of the rectifier bridge BD1 is electrically connected to the 1-pin of the rectifier bridge BD2, the positive pole of the polarized capacitor EC1, and one end of the inductor L1. The other end of the inductor L1 is electrically connected to one end of the capacitor C3, one end of the capacitor C4, the positive pole of the polarized capacitor EC2, the positive pole of the polarized capacitor EC3, one end of the resistor 5, one end of the resistor 4, one end of the resistor 3, one end of the capacitor C1, one end of the capacitor C2, and the 6-pin of the transformer T1. The negative pole of the polarized capacitor EC1 is electrically connected to one end of the fuse FB2.One end of the fuse FB2 is grounded. The other end of the fuse FB2 is electrically connected to the other end of the capacitor C3, the other end of the capacitor C4, the negative electrode of the polarized capacitor EC2, and the negative electrode of the polarized capacitor EC3 respectively. The other end of the capacitor C3 is grounded. The other end of the resistor 5 is electrically connected to the other end of the resistor 4, the other end of the resistor 3, the other end of the capacitor C1, and the negative electrode of the diode D6 respectively. The positive electrode of the diode D6 is electrically connected to one end of the fuse FB1, the other end of the capacitor C2, and the pin 1 of the transformer T1 respectively. The other end of the fuse FB1 is electrically connected to one end of the capacitor C5 and the pin 12 of the chip U1 respectively. The positive electrode of the polarized capacitor EC4 is electrically connected to the pin 3 of the triode Q1, one end of the resistor R7, one end of the resistor R9, and one end of the resistor R8 respectively. The negative electrode of the polarized capacitor EC4 is electrically connected to one end of the capacitor C7, one end of the capacitor C8, and the pin 2 of the transformer T1 respectively. The pin 1 of the triode Q1 is electrically connected to the other end of the resistor R7 and the positive electrode of the voltage stabilizing diode ZD1 respectively. The negative electrode of the voltage stabilizing diode ZD1 is grounded. The pin 2 of the triode Q1 is electrically connected to the positive electrode of the diode D5. The negative electrode of the diode D5 is electrically connected to the other end of the capacitor C7, the other end of the capacitor C8, the other end of the resistor R9, and one end of the resistor R10 respectively. The other end of the resistor R8 is electrically connected to the negative electrode of the diode D1. The positive electrode of the diode D1 is electrically connected to the pin 3 of the transformer T1 and one end of the resistor R23 respectively. The other end of the resistor R10 is electrically connected to the negative electrode of the diode D2. The positive electrode of the diode D2 is electrically connected to the pin 4 of the transformer T1. The other end of the capacitor C5 is electrically connected to the pin 8 of the chip U1, one end of the resistor R16, one end of the resistor R18, one end of the resistor R19, and one end of the resistor R20 respectively. The other end of the resistor R16 is electrically connected to one end of the capacitor C9 and the pin 7 of the chip U1 respectively. The other end of the resistor R18 is electrically connected to the other end of the resistor R19, the other end of the resistor R20, the other end of the capacitor C9, one end of the capacitor C15, one end of the resistor R22, one end of the capacitor C10, and the pin 5 of the chip U1 respectively. The other end of the resistor R19 is grounded. The other end of the capacitor C10 is electrically connected to the pin 6 of the chip U1. The pin 6 of the chip U1 is electrically connected to the negative electrode of the diode D5. The other end of the capacitor C15 is electrically connected to the other end of the resistor R23, the other end of the resistor R22, and the pin 3 of the chip U1 respectively. The pin 24 of the chip U1 is grounded. The pin 13 of the chip U1 is grounded. The pin 8 of the transformer T1 is electrically connected to one end of the capacitor CY1, one end of the resistor R14, one end of the resistor R24, the positive electrode of the polarized capacitor EC6, one end of the capacitor C17, one end of the capacitor C18, and the positive electrode of the polarized capacitor EC5 respectively.The other end of the capacitor CY1 is grounded. The 7th pin of the transformer T1 is electrically connected to the 2nd pin of the MOS transistor Q2, one end of the capacitor C6, the 14th pin of the chip U1, and one end of the resistor R13. The other end of the resistor R13 is electrically connected to the 17th pin of the chip U1. The other end of the capacitor C6 is electrically connected to one end of the resistor R6. The other end of the resistor R6 is electrically connected to the 1st pin of the MOS transistor Q2, the negative electrode of the polarized capacitor EC6, the other end of the capacitor C17, the other end of the capacitor C18, and the negative electrode of the polarized capacitor EC5. The other end of the resistor R6 is grounded. The other end of the capacitor C17 is grounded. The 3rd pin of the MOS transistor Q2 is electrically connected to the 18th pin of the chip U1. The other end of the resistor R14 is electrically connected to one end of the resistor R17 and the 23rd pin of the chip U1. The other end of the resistor R17 is electrically connected to one end of the capacitor C11, one end of the capacitor C12, one end of the capacitor C13, one end of the capacitor C14, and the 19th pin of the chip U1. One end of the capacitor C14 is grounded. The other end of the capacitor C11 is electrically connected to the 20th pin of the chip U1. The other end of the capacitor C12 is electrically connected to one end of the resistor R21 and the 21st pin of the chip U1. The other end of the resistor R21 is electrically connected to the other end of the capacitor C13. The other end of the capacitor C14 is electrically connected to the other end of the resistor R24 and the 22nd pin of the chip U1.,
[0007] Preferably, the power conversion circuit 2 includes a chip U5, an inductor L3, capacitors C24, C25, C26, C27, C28, C29, C31, C55, C60, a polarized capacitor EC7, resistors R39, R43, R44, R64 and R65. One pin of the chip U5 is electrically connected to one end of the capacitor C27, one end of the capacitor C28, one end of the capacitor C29 and one end of the capacitor CY1 respectively. The other end of the capacitor C27 is electrically connected to the other end of the capacitor C28, the other end of the capacitor C29, the pin 2 of the chip U5, the pin 3 of the chip U5, the pin 4 of the chip U5 and the pin 6 of the chip U5 respectively. The other end of the capacitor C27 is grounded. The pin 5 of the chip U5 is electrically connected to one end of the resistor R64. The other end of the resistor R64 is electrically connected to the intelligent charging identification circuit. The pin 10 of the chip U5 is electrically connected to one end of the capacitor C55. The other end of the capacitor C55 is electrically connected to one end of the resistor R65 and the pin 11 of the chip U5 respectively. The pin 11 of the chip U5 is grounded. The other end of the resistor R65 is electrically connected to the pin 7 of the chip U5. The pin 13 of the chip U5 is electrically connected to one end of the capacitor C25. The other end of the capacitor C25 is electrically connected to one end of the resistor R44. One end of the resistor R44 is grounded. The other end of the resistor R44 is electrically connected to the pin 12 of the chip U5, one end of the capacitor C31 and one end of the resistor R43 respectively. The other end of the capacitor C31 is electrically connected to one end of the inductor L3, the other end of the resistor R43, one end of the capacitor C26, the positive electrode of the polarized capacitor EC7 and one end of the capacitor C60 respectively. The other end of the capacitor C26 is electrically connected to the negative electrode of the polarized capacitor EC7 and the other end of the capacitor C60 respectively. The negative electrode of the polarized capacitor EC7 is grounded. The other end of the inductor L3 is electrically connected to the pin 8 of the chip U5 and one end of the capacitor C24 respectively. The other end of the capacitor C24 is electrically connected to one end of the resistor R39. The other end of the resistor R39 is electrically connected to the pin 9 of the chip U5.
[0008] Preferably, the intelligent charging recognition circuit includes chip U3, TYPE-C interface P3, bidirectional trigger diodes ESD1, ESD2, ESD3, ESD4, ESD8, MOS transistor Q4, detection terminals TP1, TP10, TP11, capacitors C20, C21, C23, C41, C42, C43, C44, C45, C46, C49, C54, C56, resistors R32, R34, R36, R37, R38, and resistor NTC1. The second pin of chip U3 is grounded. The third pin of chip U3 is electrically connected to one end of capacitor C49, and the other end of capacitor C49 is grounded. The fourth pin of chip U3 is electrically connected to the 23rd pin of chip U1 and one end of capacitor C41 respectively, and the other end of capacitor C41 is grounded. The fifth pin of chip U3 is electrically connected to one end of resistor R32. The seventh pin of chip U3 is electrically connected to one end of resistor NTC1. The other end of resistor R32 is electrically connected to the other end of resistor NTC1, and the other end of resistor NTC1 is grounded. The tenth pin of chip U3 is electrically connected to one end of capacitor C43, and the other end of capacitor C43 is grounded. The 13th pin of chip U3 is electrically connected to one end of capacitor C44, and the other end of capacitor C44 is grounded. The 14th pin of chip U3 is electrically connected to one end of capacitor C42, and the other end of capacitor C42 is grounded. The 16th pin of chip U3 is electrically connected to one end of capacitor C56, and the other end of capacitor C56 is grounded. The 15th pin of chip U3 is electrically connected to the other end of resistor R64. The 33rd pin of chip U3 is grounded. The 19th, 20th, and 21st pins of chip U3 are respectively electrically connected to the protection circuit. The 23rd pin of chip U3 is electrically connected to one end of inductor L3 and one end of capacitor C46 respectively, and the other end of capacitor C46 is grounded. The 24th pin of chip U3 is electrically connected to one end of resistor R38. The other end of resistor R38 is electrically connected to one end of bidirectional trigger diode ESD1, the B7 pin of TYPE-C interface P3, and the A7 pin of TYPE-C interface P3 respectively. The 25th pin of chip U3 is electrically connected to one end of resistor R37. The other end of resistor R37 is electrically connected to one end of bidirectional trigger diode ESD2, the B6 pin of TYPE-C interface P3, and the A6 pin of TYPE-C interface P3 respectively. The 26th pin of chip U3 is electrically connected to one end of capacitor C54, one end of bidirectional trigger diode ESD3, and the B5 pin of TYPE-C interface P3 respectively.The 27th pin of the chip U3 is electrically connected to one end of the capacitor C20, one end of the bidirectional trigger diode ESD4, and the A5 pin of the TYPE-C interface P3. The other end of the bidirectional trigger diode ESD1 is electrically connected to the other end of the bidirectional trigger diode ESD2, the other end of the bidirectional trigger diode ESD3, and the other end of the bidirectional trigger diode ESD4. The other end of the bidirectional trigger diode ESD4 is grounded. The 28th pin of the chip U3 is electrically connected to one end of the capacitor C21, one end of the capacitor C23, one end of the bidirectional trigger diode ESD3, the A5 pin of the TYPE-C interface P3, the B4 pin of the TYPE-C interface P3, the A9 pin of the TYPE-C interface P3, the B8 pin of the TYPE-C interface P3, the detection terminal TP1, and the 1st pin of the MOS transistor Q4. The other end of the capacitor C54 is electrically connected to the other end of the capacitor C20, the other end of the capacitor C21, and the other end of the capacitor C23. The other end of the capacitor C54 is grounded. The other end of the bidirectional trigger diode ESD3 is grounded. The 29th pin of the chip U3 is electrically connected to the 3rd pin of the MOS transistor Q4. The 30th pin of the chip U3 is electrically connected to the 2nd pin of the MOS transistor Q4, the detection terminal TP11, and one end of the resistor R36. The 31st pin of the chip U3 is electrically connected to the detection terminal TP10, the positive electrode of the polarized capacitor EC6, the other end of the resistor R36, and one end of the resistor R34. The 32nd pin of the chip U3 is electrically connected to one end of the resistor C45 and the other end of the resistor R34. The other end of the resistor C45 is grounded. The B1 pin of the TYPE-C interface P3 is electrically connected to the A12 pin of the TYPE-C interface P3. The B1 pin of the TYPE-C interface P3 is grounded. The A1 pin of the TYPE-C interface P3 is electrically connected to the B12 pin of the TYPE-C interface P3. The A1 pin of the TYPE-C interface P3 is grounded.,
[0009] Preferably, the protection circuit includes a USB interface P4, a chip U6, an MOS transistor Q7, an MOS transistor Q8, a detection terminal TP12, a detection terminal TP13, a bidirectional trigger diode ESD5, a bidirectional trigger diode ESD6, a bidirectional trigger diode ESD7, a resistor R45, a resistor R49, a resistor R51, a resistor R53, a resistor R54, a resistor R55, a resistor R58, a resistor R59, a resistor R60, a resistor R61, a resistor R62, a resistor R63, a capacitor C40, a capacitor C53, a capacitor C59, and a diode D10. One end of the 5th pin of the chip U6 is electrically connected to one end of the resistor R63 and one end of the capacitor C53, and the other end of the capacitor C53 is grounded. One end of the 4th pin of the chip U6 is electrically connected to one end of the resistor R55 and one end of the resistor R54. The other end of the resistor R55 is electrically connected to the 13th pin of the chip U3. One end of the 3rd pin of the chip U6 is electrically connected to the other end of the resistor R54 and one end of the resistor R53. The 2nd pin of the chip U6 is grounded. One end of the 1st pin of the chip U6 is electrically connected to one end of the resistor R51 and one end of the resistor R49. The other end of the resistor R51 is grounded. The other end of the resistor R53 is electrically connected to one end of the resistor R45 and the detection terminal TP13. One end of the resistor R45 is grounded. The other end of the resistor R45 is electrically connected to the detection terminal TP13, the other end of the resistor R49, the 0th pin of the USB interface P4, the 1st pin of the USB interface P4, one end of the bidirectional trigger diode ESD5, one end of the bidirectional trigger diode ESD6, and one end of the bidirectional trigger diode ESD7. The bidirectional trigger diode ESD7 is grounded. The 2nd pin of the USB interface P4 is electrically connected to the other end of the bidirectional trigger diode ESD5 and one end of the resistor R59. The other end of the resistor R59 is electrically connected to the 21st pin of the chip U3. The 2nd pin of the USB interface P4 is electrically connected to the other end of the bidirectional trigger diode ESD6 and one end of the resistor R58. The other end of the resistor R58 is electrically connected to the 20th pin of the chip U3. The 4th pin of the USB interface P4 is electrically connected to the 1st pin of the MOS transistor Q8, the negative electrode of the diode D10, the other end of the bidirectional trigger diode ESD7, one end of the inductor L3, and one end of the capacitor C40. The positive electrode of the diode D10 is electrically connected to the other end of the resistor R63. The other end of the capacitor C40 is electrically connected to the 2nd pin of the MOS transistor Q7. The 1st pin of the MOS transistor Q7 is electrically connected to one end of the resistor R62. The other end of the resistor R62 is electrically connected to the 19th pin of the chip U3. The 3rd pin of the MOS transistor Q7 is electrically connected to one end of the resistor R61. The other end of the resistor R61 is electrically connected to one end of the resistor R60, one end of the capacitor C59, and the 3rd pin of the MOS transistor Q7.The other end of the resistor R60 is electrically connected to the other end of the capacitor C59 and the pin 2 of the MOS transistor Q7 respectively.
[0010] The control method is as follows: 1) When in use, first connect the power supply port AC to a three-phase power supply. Among them, the pin 1 of the power supply port AC is electrically connected to the N wire in the three-phase power supply, and the pin 2 of the power supply port AC is electrically connected to the L wire in the three-phase power supply; 2) Then select the corresponding charging interface according to the interface of the charging cable. After installing the charging cable, the intelligent charging recognition circuit will recognize the charging voltage required by the current charging cable; 3) During the charging process, the intelligent charging recognition circuit will respectively control the power conversion circuit 1 and the power conversion circuit 2 to perform power conversion on the power input from the power supply port AC according to the inserted charging cable, so as to obtain the required output voltage; 4) The chip U1 and the MOS transistor Q2 perform PWM drive signal switching, so that the power supply operates safely in the continuous conduction mode (CCM) under low-voltage AC input, and performs switching power conversion, thus realizing the adaptive zero-voltage switching (ZVS) function in the discontinuous conduction mode (CCM); 5) Then, through the energy transfer of the transformer T1, safety isolation control is carried out to convert the input alternating current into the DC voltage required for device charging; 6) Then, the output voltage is adjusted to 5V through the chip U5. At this time, the charging voltage and current can be 5V0 - 2.4A, 5V0 - 3A, 9V0 - 3A, 12V0 - 3A, 15V0 - 3A, 20V0 - 3A respectively. These six voltages can greatly increase the power supply adaptability; 7) Multiple output voltages and currents are realized to supply power to charging devices with different requirements; 8) In addition, the output voltage or current is adjusted through the control of U3 to realize fast charging at 1.4 times the rated power for 10 minutes and then reduce to the rated power again.
[0011] By adding the design concept of an embedded charger to the intelligent switch, the present invention aims to provide a more efficient, safe and convenient charging solution for users. The present invention adopts advanced materials and manufacturing processes to improve the stability and applicability of the product. When decorating existing offices, public places and the home market, the present invention can be installed in the wall. This design can perfectly hide the charger plug in the wall, make the charger fit the wall more flatly, and can greatly improve the beauty and neatness of the home space, and can instantly improve the convenience of use.
[0012] Among them, the model of chip U1 is: MP2100, the model of chip U3 is: SC2021, the model of chip U5 is: LA3616, and the model of chip U6 is: LMV321.
[0013] The working control principle of the present invention: The power supply performs power conversion through power conversion circuit 1 and power conversion circuit 2, and obtains an adjustable output voltage through chip U3 in the intelligent charging recognition circuit and power conversion circuit 2. U1 and Q2 perform PWM drive signal switching, enabling the power supply to operate safely in continuous conduction mode (CCM) under low-voltage AC input, and performing switching power conversion, thus realizing the adaptive zero-voltage switching (ZVS) function in discontinuous conduction mode (CCM), thereby improving the power supply efficiency. Then, through the energy transfer of transformer T1 for safety isolation control, the input alternating current is converted into the DC voltage required for device charging.
[0014] When the device is inserted into the port for charging, at this time, the power supply internally has a protocol recognition chip U3, which can identify different intelligent electronic devices, adjust the power conversion circuit 1 and 2 loops, thereby adjusting the output voltage and current of the power supply. Then, through chip U5, the main circuit output voltage is adjusted to 5V. At this time, the charging voltage and current can be 5V0 - 2.4A, 5V0 - 3A, 9V0 - 3A, 12V0 - 3A, 15V0 - 3A, 20V0 - 3A respectively. These six voltages can greatly increase the power supply adaptability. It realizes multiple output voltages and currents, and supplies power to charging devices with different requirements.
[0015] In addition, through U3 control, the output voltage or current is adjusted to achieve fast charging at 1.4 times the rated power for 10 minutes and then reduced to the rated power again.
[0016] The present invention adopts an integrated soft-switching variable-frequency PWM controller + GaN solution, and realizes the intelligent control function of the output voltage through a PD protocol chip and an MCU. It conducts research and application on the latest semiconductor GaN technology + quasi-resonant topology + zero-voltage switching (ZVS). The working frequency of the entire power supply is designed to be 150 - 220KHZ. Compared with the traditional quasi-resonant controller + silicon MOS, the volume of the power supply is reduced by nearly 50%, and the efficiency is increased by about 2 - 4%, thus realizing the application design of miniaturization and high power density.
[0017] At the same time, it adopts communication protocols such as Power Delivery (PD) protocol, PPS, QC, AFC, FCP, SCP, and PE. When we travel, go on business trips or work from home, we only need to carry a charging cable that supports fast charging to provide continuous power support for electronic products such as mobile phones, laptops, and thin and light tablets, without worrying about compatibility issues, further improving the convenience of travel.
[0018] The present invention has the following beneficial effects: small volume, high charging efficiency, and good compatibility. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Attached Figure 1 is a schematic diagram of the power conversion circuit 1 of the present invention.
[0020] Attached Figure 2 is a schematic diagram of the power conversion circuit 2 of the present invention.
[0021] Attached Figure 3 is a schematic diagram of the intelligent charging identification circuit of the present invention.
[0022] Attached Figure 4 is a schematic diagram of the protection circuit of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0023] The technical solution of the present invention will be further specifically described below through embodiments in conjunction with the drawings.
[0024] Embodiment: According to the attached Figure 1 , attached Figure 2 , attached Figure 3 and attached Figure 4 the present invention is further described. An embedded small-volume intelligent fast charger and its control method in this example include a three-phase power supply and a power conversion circuit 1 electrically connected to the three-phase power supply. A power conversion circuit 2 is provided on one side of the power conversion circuit 1. An intelligent charging identification circuit is provided on the other side of the power conversion circuit 2. A protection circuit is provided on the other side of the intelligent charging identification circuit. The input end of the power conversion circuit 1 is electrically connected to the output end of the three-phase power supply. The output end of the power conversion circuit 1 is electrically connected to the input end of the power conversion circuit 2. The output end of the power conversion circuit 2 is electrically connected to the input end of the intelligent charging identification circuit. The output end of the intelligent charging identification circuit is electrically connected to the input end of the protection circuit.
[0025] The described power conversion circuit 1 includes a power supply port AC, a chip U1, a transformer LF1, an inductor L1, a transformer T1, a rectifier bridge BD1, a rectifier bridge BD2, a fuse F1, fuses FB1, FB2, a triode Q1, a MOS transistor Q2, resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, R23, R24, R25, R26, R27, capacitors C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, C17, C18, capacitor CX1, capacitor CY1, polarized capacitors EC1, EC2, EC3, EC4, EC5, EC6, a zener diode ZD1, diodes D1, D2, D3, D4, D5, and D6. The 1-pin of the power supply port AC is electrically connected to the 3-pin of the transformer LF1. The 2-pin of the transformer LF1 is electrically connected to one end of the fuse F1. The other end of the fuse F1 is electrically connected to the 2-pin of the power supply port AC. The 4-pin of the transformer LF1 is electrically connected to one end of the capacitor CX1, one end of the resistor R1, the positive electrode of the diode D4, the 2-pin of the rectifier bridge BD1, and the 3-pin of the rectifier bridge BD1. The 1-pin of the transformer LF1 is electrically connected to the other end of the capacitor CX1, the positive electrode of the diode D3, one end of the resistor R2, the 2-pin of the rectifier bridge BD2, and the 3-pin of the rectifier bridge BD1. The other ends of the resistor R1 and the resistor R2 are electrically connected. The negative electrode of the diode D4 is electrically connected to the negative electrode of the diode D3 and one end of the resistor R26. The other end of the resistor R26 is electrically connected to one end of the resistor R27. The other end of the resistor R27 is electrically connected to the 1-pin of the chip U1. The 4-pin of the rectifier bridge BD1 is electrically connected to the 4-pin of the rectifier bridge BD2. The 4-pin of the rectifier bridge BD1 is grounded. The 1-pin of the rectifier bridge BD1 is electrically connected to the 1-pin of the rectifier bridge BD2, the positive electrode of the polarized capacitor EC1, and one end of the inductor L1. The other end of the inductor L1 is electrically connected to one end of the capacitor C3, one end of the capacitor C4, the positive electrode of the polarized capacitor EC2, the positive electrode of the polarized capacitor EC3, one end of the resistor 5, one end of the resistor 4, one end of the resistor 3, one end of the capacitor C1, one end of the capacitor C2, and the 6-pin of the transformer T1. The negative electrode of the polarized capacitor EC1 is electrically connected to one end of the fuse FB2.One end of the fuse FB2 is grounded. The other end of the fuse FB2 is electrically connected to the other end of the capacitor C3, the other end of the capacitor C4, the negative electrode of the polarized capacitor EC2, and the negative electrode of the polarized capacitor EC3 respectively. The other end of the capacitor C3 is grounded. The other end of the resistor 5 is electrically connected to the other end of the resistor 4, the other end of the resistor 3, the other end of the capacitor C1, and the negative electrode of the diode D6 respectively. The positive electrode of the diode D6 is electrically connected to one end of the fuse FB1, the other end of the capacitor C2, and the pin 1 of the transformer T1 respectively. The other end of the fuse FB1 is electrically connected to one end of the capacitor C5 and the pin 12 of the chip U1 respectively. The positive electrode of the polarized capacitor EC4 is electrically connected to the pin 3 of the triode Q1, one end of the resistor R7, one end of the resistor R9, and one end of the resistor R8 respectively. The negative electrode of the polarized capacitor EC4 is electrically connected to one end of the capacitor C7, one end of the capacitor C8, and the pin 2 of the transformer T1 respectively. The pin 1 of the triode Q1 is electrically connected to the other end of the resistor R7 and the positive electrode of the zener diode ZD1 respectively. The negative electrode of the zener diode ZD1 is grounded. The pin 2 of the triode Q1 is electrically connected to the positive electrode of the diode D5. The negative electrode of the diode D5 is electrically connected to the other end of the capacitor C7, the other end of the capacitor C8, the other end of the resistor R9, and one end of the resistor R10 respectively. The other end of the resistor R8 is electrically connected to the negative electrode of the diode D1. The positive electrode of the diode D1 is electrically connected to the pin 3 of the transformer T1 and one end of the resistor R23 respectively. The other end of the resistor R10 is electrically connected to the negative electrode of the diode D2. The positive electrode of the diode D2 is electrically connected to the pin 4 of the transformer T1. The other end of the capacitor C5 is electrically connected to the pin 8 of the chip U1, one end of the resistor R16, one end of the resistor R18, one end of the resistor R19, and one end of the resistor R20 respectively. The other end of the resistor R16 is electrically connected to one end of the capacitor C9 and the pin 7 of the chip U1 respectively. The other end of the resistor R18 is electrically connected to the other end of the resistor R19, the other end of the resistor R20, the other end of the capacitor C9, one end of the capacitor C15, one end of the resistor R22, one end of the capacitor C10, and the pin 5 of the chip U1 respectively. The other end of the resistor R19 is grounded. The other end of the capacitor C10 is electrically connected to the pin 6 of the chip U1. The pin 6 of the chip U1 is electrically connected to the negative electrode of the diode D5. The other end of the capacitor C15 is electrically connected to the other end of the resistor R23, the other end of the resistor R22, and the pin 3 of the chip U1 respectively. The pin 24 of the chip U1 is grounded. The pin 13 of the chip U1 is grounded. The pin 8 of the transformer T1 is electrically connected to one end of the capacitor CY1, one end of the resistor R14, one end of the resistor R24, the positive electrode of the polarized capacitor EC6, one end of the capacitor C17, one end of the capacitor C18, and the positive electrode of the polarized capacitor EC5 respectively.The other end of the capacitor CY1 is grounded. The 7-pin of the transformer T1 is electrically connected to the 2-pin of the MOS transistor Q2, one end of the capacitor C6, the 14-pin of the chip U1, and one end of the resistor R13. The other end of the resistor R13 is electrically connected to the 17-pin of the chip U1. The other end of the capacitor C6 is electrically connected to one end of the resistor R6. The other end of the resistor R6 is electrically connected to the 1-pin of the MOS transistor Q2, the negative electrode of the polarized capacitor EC6, the other end of the capacitor C17, the other end of the capacitor C18, and the negative electrode of the polarized capacitor EC5. The other end of the resistor R6 is grounded. The other end of the capacitor C17 is grounded. The 3-pin of the MOS transistor Q2 is electrically connected to the 18-pin of the chip U1. The other end of the resistor R14 is electrically connected to one end of the resistor R17 and the 23-pin of the chip U1. The other end of the resistor R17 is electrically connected to one end of the capacitor C11, one end of the capacitor C12, one end of the capacitor C13, one end of the capacitor C14, and the 19-pin of the chip U1. One end of the capacitor C14 is grounded. The other end of the capacitor C11 is electrically connected to the 20-pin of the chip U1. The other end of the capacitor C12 is electrically connected to one end of the resistor R21 and the 21-pin of the chip U1. The other end of the resistor R21 is electrically connected to the other end of the capacitor C13. The other end of the capacitor C14 is electrically connected to the other end of the resistor R24 and the 22-pin of the chip U1.,
[0026] The described power conversion circuit 2 includes a chip U5, an inductor L3, capacitors C24, C25, C26, C27, C28, C29, C31, C55, C60, a polarized capacitor EC7, resistors R39, R43, R44, R64, and R65. One pin of the chip U5 is electrically connected to one end of the capacitor C27, one end of the capacitor C28, one end of the capacitor C29, and one end of the capacitor CY1. The other end of the capacitor C27 is electrically connected to the other end of the capacitor C28, the other end of the capacitor C29, pin 2 of the chip U5, pin 3 of the chip U5, pin 4 of the chip U5, and pin 6 of the chip U5. The other end of the capacitor C27 is grounded. Pin 5 of the chip U5 is electrically connected to one end of the resistor R64. The other end of the resistor R64 is electrically connected to the intelligent charging identification circuit. Pin 10 of the chip U5 is electrically connected to one end of the capacitor C55. The other end of the capacitor C55 is electrically connected to one end of the resistor R65 and pin 11 of the chip U5. Pin 11 of the chip U5 is grounded. The other end of the resistor R65 is electrically connected to pin 7 of the chip U5. Pin 13 of the chip U5 is electrically connected to one end of the capacitor C25. The other end of the capacitor C25 is electrically connected to one end of the resistor R44. One end of the resistor R44 is grounded. The other end of the resistor R44 is electrically connected to pin 12 of the chip U5, one end of the capacitor C31, and one end of the resistor R43. The other end of the capacitor C31 is electrically connected to one end of the inductor L3, the other end of the resistor R43, one end of the capacitor C26, the positive electrode of the polarized capacitor EC7, and one end of the capacitor C60. The other end of the capacitor C26 is electrically connected to the negative electrode of the polarized capacitor EC7 and the other end of the capacitor C60. The negative electrode of the polarized capacitor EC7 is grounded. The other end of the inductor L3 is electrically connected to pin 8 of the chip U5 and one end of the capacitor C24. The other end of the capacitor C24 is electrically connected to one end of the resistor R39. The other end of the resistor R39 is electrically connected to pin 9 of the chip U5.
[0027] The described intelligent charging recognition circuit includes chip U3, TYPE-C interface P3, bidirectional trigger diodes ESD1, ESD2, ESD3, ESD4, ESD8, MOS transistor Q4, detection terminals TP1, TP10, TP11, capacitors C20, C21, C23, C41, C42, C43, C44, C45, C46, C49, C54, C56, resistors R32, R34, R36, R37, R38, and resistor NTC1. The 2-pin of chip U3 is grounded. The 3-pin of chip U3 is electrically connected to one end of capacitor C49, and the other end of capacitor C49 is grounded. The 4-pin of chip U3 is electrically connected to the 23-pin of chip U1 and one end of capacitor C41 respectively, and the other end of capacitor C41 is grounded. The 5-pin of chip U3 is electrically connected to one end of resistor R32. The 7-pin of chip U3 is electrically connected to one end of resistor NTC1. The other end of resistor R32 is electrically connected to the other end of resistor NTC1, and the other end of resistor NTC1 is grounded. The 10-pin of chip U3 is electrically connected to one end of capacitor C43, and the other end of capacitor C43 is grounded. The 13-pin of chip U3 is electrically connected to one end of capacitor C44, and the other end of capacitor C44 is grounded. The 14-pin of chip U3 is electrically connected to one end of capacitor C42, and the other end of capacitor C42 is grounded. The 16-pin of chip U3 is electrically connected to one end of capacitor C56, and the other end of capacitor C56 is grounded. The 15-pin of chip U3 is electrically connected to the other end of resistor R64. The 33-pin of chip U3 is grounded. The 19-pin, 20-pin, and 21-pin of chip U3 are respectively electrically connected to the protection circuit. The 23-pin of chip U3 is electrically connected to one end of inductor L3 and one end of capacitor C46 respectively, and the other end of capacitor C46 is grounded. The 24-pin of chip U3 is electrically connected to one end of resistor R38. The other end of resistor R38 is electrically connected to one end of bidirectional trigger diode ESD1, the B7 pin of TYPE-C interface P3, and the A7 pin of TYPE-C interface P3 respectively. The 25-pin of chip U3 is electrically connected to one end of resistor R37. The other end of resistor R37 is electrically connected to one end of bidirectional trigger diode ESD2, the B6 pin of TYPE-C interface P3, and the A6 pin of TYPE-C interface P3 respectively. The 26-pin of chip U3 is electrically connected to one end of capacitor C54, one end of bidirectional trigger diode ESD3, and the B5 pin of TYPE-C interface P3 respectively.The 27th pin of the chip U3 is electrically connected to one end of the capacitor C20, one end of the bidirectional trigger diode ESD4, and the A5 pin of the TYPE-C interface P3. The other end of the bidirectional trigger diode ESD1 is electrically connected to the other ends of the bidirectional trigger diodes ESD2, ESD3, and ESD4 respectively. The other end of the bidirectional trigger diode ESD4 is grounded. The 28th pin of the chip U3 is electrically connected to one end of the capacitor C21, one end of the capacitor C23, one end of the bidirectional trigger diode ESD3, the A5 pin of the TYPE-C interface P3, the B4 pin of the TYPE-C interface P3, the A9 pin of the TYPE-C interface P3, the B8 pin of the TYPE-C interface P3, the detection terminal TP1, and the 1st pin of the MOS transistor Q4. The other end of the capacitor C54 is electrically connected to the other ends of the capacitors C20, C21, and C23 respectively. The other end of the capacitor C54 is grounded. The other end of the bidirectional trigger diode ESD3 is grounded. The 29th pin of the chip U3 is electrically connected to the 3rd pin of the MOS transistor Q4. The 30th pin of the chip U3 is electrically connected to the 2nd pin of the MOS transistor Q4, the detection terminal TP11, and one end of the resistor R36. The 31st pin of the chip U3 is electrically connected to the detection terminal TP10, the positive electrode of the polarized capacitor EC6, the other end of the resistor R36, and one end of the resistor R34. The 32nd pin of the chip U3 is electrically connected to one end of the resistor C45 and the other end of the resistor R34. The other end of the resistor C45 is grounded. The B1 pin of the TYPE-C interface P3 is electrically connected to the A12 pin of the TYPE-C interface P3. The B1 pin of the TYPE-C interface P3 is grounded. The A1 pin of the TYPE-C interface P3 is electrically connected to the B12 pin of the TYPE-C interface P3. The A1 pin of the TYPE-C interface P3 is grounded.,
[0028] The protection circuit described above includes USB interface P4, chip U6, MOS transistor Q7, MOS transistor Q8, detection terminals TP12, detection terminal TP13, bidirectional trigger diodes ESD5, bidirectional trigger diodes ESD6, bidirectional trigger diodes ESD7, resistor R45, resistor R49, resistor R51, resistor R53, resistor R54, resistor R55, resistor R58, resistor R59, resistor R60, resistor R61, resistor R62, resistor R63, capacitor C40, capacitor C53, capacitor C59, and diode D10. One end of resistor R63 and one end of capacitor C53 are electrically connected to the 5th pin of chip U6 respectively. The other end of capacitor C53 is grounded. One end of resistor R55 and one end of resistor R54 are electrically connected to the 4th pin of chip U6 respectively. The other end of resistor R55 is electrically connected to the 13th pin of chip U3. One end of resistor R54 and one end of resistor R53 are electrically connected to the 3rd pin of chip U6 respectively. The 2nd pin of chip U6 is grounded. One end of resistor R51 and one end of resistor R49 are electrically connected to the 1st pin of chip U6 respectively. The other end of resistor R51 is grounded. The other end of resistor R53 is electrically connected to one end of resistor R45 and detection terminal TP13 respectively. One end of resistor R45 is grounded. The other end of resistor R45 is electrically connected to detection terminal TP13, the other end of resistor R49, the 0th pin of USB interface P4, the 1st pin of USB interface P4, one end of bidirectional trigger diode ESD5, one end of bidirectional trigger diode ESD6, and one end of bidirectional trigger diode ESD7 respectively. Bidirectional trigger diode ESD7 is grounded. The 2nd pin of USB interface P4 is electrically connected to the other end of bidirectional trigger diode ESD5 and one end of resistor R59 respectively. The other end of resistor R59 is electrically connected to the 21st pin of chip U3. The 2nd pin of USB interface P4 is electrically connected to the other end of bidirectional trigger diode ESD6 and one end of resistor R58 respectively. The other end of resistor R58 is electrically connected to the 20th pin of chip U3. The 4th pin of USB interface P4 is electrically connected to the 1st pin of MOS transistor Q8, the negative electrode of diode D10, the other end of bidirectional trigger diode ESD7, one end of inductor L3, and one end of capacitor C40 respectively. The positive electrode of diode D10 is electrically connected to the other end of resistor R63. The other end of capacitor C40 is electrically connected to the 2nd pin of MOS transistor Q7. The 1st pin of MOS transistor Q7 is electrically connected to one end of resistor R62. The other end of resistor R62 is electrically connected to the 19th pin of chip U3. The 3rd pin of MOS transistor Q7 is electrically connected to one end of resistor R61. The other end of resistor R61 is electrically connected to one end of resistor R60, one end of capacitor C59, and the 3rd pin of MOS transistor Q7 respectively.The other end of the resistor R60 is electrically connected to the other end of the capacitor C59 and the pin 2 of the MOS transistor Q7 respectively.
[0029] The control method is as follows: 9) During use, first connect the power supply port AC to the three-phase power supply. Among them, the pin 1 of the power supply port AC is electrically connected to the N wire in the three-phase power supply, and the pin 2 of the power supply port AC is electrically connected to the L wire in the three-phase power supply; 10) Then select the corresponding charging interface according to the interface of the charging cable. After installing the charging cable, the intelligent charging recognition circuit will recognize the charging voltage required by the current charging cable; 11) During the charging process, the intelligent charging recognition circuit will respectively control the power conversion circuit 1 and the power conversion circuit 2 to perform power conversion on the power input from the power supply port AC according to the inserted charging cable, so as to obtain the required output voltage; 12) The chip U1 and the MOS transistor Q2 perform PWM drive signal switching, so that the power supply operates safely in the continuous conduction mode (CCM) under low-voltage AC input, and performs switching power conversion, thereby realizing the adaptive zero-voltage switching (ZVS) function in the discontinuous conduction mode (CCM); 13) Then, through the energy transfer of the transformer T1, safety isolation control is carried out to convert the input alternating current into the DC voltage required for device charging; 14) Then, the chip U5 adjusts the output voltage to 5V. At this time, the charging voltage and current can be 5V0 - 2.4A, 5V0 - 3A, 9V0 - 3A, 12V0 - 3A, 15V0 - 3A, 20V0 - 3A respectively. The above six voltages can greatly increase the power supply adaptability; 15) Multiple output voltages and currents are realized to supply power to charging devices with different requirements; 16) In addition, through the control of U3, the output voltage or current is adjusted to realize fast charging at 1.4 times the rated power for 10 minutes and then reduced to the rated power again.
[0030] The above are only specific embodiments of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present invention are covered by the patent scope of the present invention.
Claims
1. An embedded small-sized intelligent fast charger, comprising a three-phase power supply and a power conversion circuit 1 electrically connected to the three-phase power supply, characterized in that, On one side of the power conversion circuit 1, there is a power conversion circuit 2. On the other side of the power conversion circuit 2, there is an intelligent charging identification circuit. On the other side of the intelligent charging identification circuit, there is a protection circuit. The input end of the power conversion circuit 1 is electrically connected to the output end of a three-phase power supply. The output end of the power conversion circuit 1 is electrically connected to the input end of the power conversion circuit 2. The output end of the power conversion circuit 2 is electrically connected to the input end of the intelligent charging identification circuit. The output end of the intelligent charging identification circuit is electrically connected to the input end of the protection circuit.
2. The embedded small-sized intelligent fast charger according to claim 1, characterized in that, The described power conversion circuit 1 includes a power supply port AC, a chip U1, a transformer LF1, an inductor L1, a transformer T1, a rectifier bridge BD1, a rectifier bridge BD2, a fuse F1, fuses FB1, FB2, a triode Q1, a MOS transistor Q2, resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, R23, R24, R25, R26, R27, capacitors C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, C17, C18, capacitor CX1, capacitor CY1, polarized capacitors EC1, EC2, EC3, EC4, EC5, EC6, a zener diode ZD1, diodes D1, D2, D3, D4, D5, and D6. The 1-pin of the power supply port AC is electrically connected to the 3-pin of the transformer LF1. The 2-pin of the transformer LF1 is electrically connected to one end of the fuse F1. The other end of the fuse F1 is electrically connected to the 2-pin of the power supply port AC. The 4-pin of the transformer LF1 is electrically connected to one end of the capacitor CX1, one end of the resistor R1, the positive electrode of the diode D4, the 2-pin of the rectifier bridge BD1, and the 3-pin of the rectifier bridge BD1. The 1-pin of the transformer LF1 is electrically connected to the other end of the capacitor CX1, the positive electrode of the diode D3, one end of the resistor R2, the 2-pin of the rectifier bridge BD2, and the 3-pin of the rectifier bridge BD1. The other ends of the resistor R1 and the resistor R2 are electrically connected. The negative electrode of the diode D4 is electrically connected to the negative electrode of the diode D3 and one end of the resistor R26. The other end of the resistor R26 is electrically connected to one end of the resistor R27. The other end of the resistor R27 is electrically connected to the 1-pin of the chip U1. The 4-pin of the rectifier bridge BD1 is electrically connected to the 4-pin of the rectifier bridge BD2. The 4-pin of the rectifier bridge BD1 is grounded. The 1-pin of the rectifier bridge BD1 is electrically connected to the 1-pin of the rectifier bridge BD2, the positive electrode of the polarized capacitor EC1, and one end of the inductor L1. The other end of the inductor L1 is electrically connected to one end of the capacitor C3, one end of the capacitor C4, the positive electrode of the polarized capacitor EC2, the positive electrode of the polarized capacitor EC3, one end of the resistor 5, one end of the resistor 4, one end of the resistor 3, one end of the capacitor C1, one end of the capacitor C2, and the 6-pin of the transformer T1. The negative electrode of the polarized capacitor EC1 is electrically connected to one end of the fuse FB2.One end of the fuse FB2 is grounded. The other end of the fuse FB2 is electrically connected to the other end of the capacitor C3, the other end of the capacitor C4, the negative electrode of the polarized capacitor EC2, and the negative electrode of the polarized capacitor EC3 respectively. The other end of the capacitor C3 is grounded. The other end of the resistor 5 is electrically connected to the other end of the resistor 4, the other end of the resistor 3, the other end of the capacitor C1, and the negative electrode of the diode D6 respectively. The positive electrode of the diode D6 is electrically connected to one end of the fuse FB1, the other end of the capacitor C2, and the pin 1 of the transformer T1 respectively. The other end of the fuse FB1 is electrically connected to one end of the capacitor C5 and the pin 12 of the chip U1 respectively. The positive electrode of the polarized capacitor EC4 is electrically connected to the pin 3 of the triode Q1, one end of the resistor R7, one end of the resistor R9, and one end of the resistor R8 respectively. The negative electrode of the polarized capacitor EC4 is electrically connected to one end of the capacitor C7, one end of the capacitor C8, and the pin 2 of the transformer T1 respectively. The pin 1 of the triode Q1 is electrically connected to the other end of the resistor R7 and the positive electrode of the zener diode ZD1 respectively. The negative electrode of the zener diode ZD1 is grounded. The pin 2 of the triode Q1 is electrically connected to the positive electrode of the diode D5. The negative electrode of the diode D5 is electrically connected to the other end of the capacitor C7, the other end of the capacitor C8, the other end of the resistor R9, and one end of the resistor R10 respectively. The other end of the resistor R8 is electrically connected to the negative electrode of the diode D1. The positive electrode of the diode D1 is electrically connected to the pin 3 of the transformer T1 and one end of the resistor R23 respectively. The other end of the resistor R10 is electrically connected to the negative electrode of the diode D2. The positive electrode of the diode D2 is electrically connected to the pin 4 of the transformer T1. The other end of the capacitor C5 is electrically connected to the pin 8 of the chip U1, one end of the resistor R16, one end of the resistor R18, one end of the resistor R19, and one end of the resistor R20 respectively. The other end of the resistor R16 is electrically connected to one end of the capacitor C9 and the pin 7 of the chip U1 respectively. The other end of the resistor R18 is electrically connected to the other end of the resistor R19, the other end of the resistor R20, the other end of the capacitor C9, one end of the capacitor C15, one end of the resistor R22, one end of the capacitor C10, and the pin 5 of the chip U1 respectively. The other end of the resistor R19 is grounded. The other end of the capacitor C10 is electrically connected to the pin 6 of the chip U1. The pin 6 of the chip U1 is electrically connected to the negative electrode of the diode D5. The other end of the capacitor C15 is electrically connected to the other end of the resistor R23, the other end of the resistor R22, and the pin 3 of the chip U1 respectively. The pin 24 of the chip U1 is grounded. The pin 13 of the chip U1 is grounded. The pin 8 of the transformer T1 is electrically connected to one end of the capacitor CY1, one end of the resistor R14, one end of the resistor R24, the positive electrode of the polarized capacitor EC6, one end of the capacitor C17, one end of the capacitor C18, and the positive electrode of the polarized capacitor EC5 respectively.The other end of the capacitor CY1 is grounded. The 7th pin of the transformer T1 is electrically connected to the 2nd pin of the MOS transistor Q2, one end of the capacitor C6, the 14th pin of the chip U1, and one end of the resistor R13. The other end of the resistor R13 is electrically connected to the 17th pin of the chip U1. The other end of the capacitor C6 is electrically connected to one end of the resistor R6. The other end of the resistor R6 is electrically connected to the 1st pin of the MOS transistor Q2, the negative electrode of the polarized capacitor EC6, the other end of the capacitor C17, the other end of the capacitor C18, and the negative electrode of the polarized capacitor EC5. The other end of the resistor R6 is grounded. The other end of the capacitor C17 is grounded. The 3rd pin of the MOS transistor Q2 is electrically connected to the 18th pin of the chip U1. The other end of the resistor R14 is electrically connected to one end of the resistor R17 and the 23rd pin of the chip U1. The other end of the resistor R17 is electrically connected to one end of the capacitor C11, one end of the capacitor C12, one end of the capacitor C13, one end of the capacitor C14, and the 19th pin of the chip U1. One end of the capacitor C14 is grounded. The other end of the capacitor C11 is electrically connected to the 20th pin of the chip U1. The other end of the capacitor C12 is electrically connected to one end of the resistor R21 and the 21st pin of the chip U1. The other end of the resistor R21 is electrically connected to the other end of the capacitor C13. The other end of the capacitor C14 is electrically connected to the other end of the resistor R24 and the 22nd pin of the chip U1., 3. The embedded small-sized intelligent fast charger according to claim 2, wherein The power conversion circuit 2 includes a chip U5, an inductor L3, capacitors C24, C25, C26, C27, C28, C29, C31, C55, C60, a polarized capacitor EC7, resistors R39, R43, R44, R64, and R65. One pin 1 of the chip U5 is electrically connected to one end of capacitors C27, C28, C29, and CY1 respectively. The other end of the capacitor C27 is electrically connected to the other ends of the capacitors C28, C29, pin 2 of the chip U5, pin 3 of the chip U5, pin 4 of the chip U5, and pin 6 of the chip U5 respectively. The other end of the capacitor C27 is grounded. Pin 5 of the chip U5 is electrically connected to one end of the resistor R64. The other end of the resistor R64 is electrically connected to the intelligent charging identification circuit. Pin 10 of the chip U5 is electrically connected to one end of the capacitor C55. The other end of the capacitor C55 is electrically connected to one end of the resistor R65 and pin 11 of the chip U5 respectively. Pin 11 of the chip U5 is grounded. The other end of the resistor R65 is electrically connected to pin 7 of the chip U5. Pin 13 of the chip U5 is electrically connected to one end of the capacitor C25. The other end of the capacitor C25 is electrically connected to one end of the resistor R44. One end of the resistor R44 is grounded. The other end of the resistor R44 is electrically connected to pin 12 of the chip U5, one end of the capacitor C31, and one end of the resistor R43 respectively. The other end of the capacitor C31 is electrically connected to one end of the inductor L3, the other end of the resistor R43, one end of the capacitor C26, the positive electrode of the polarized capacitor EC7, and one end of the capacitor C60 respectively. The other end of the capacitor C26 is electrically connected to the negative electrode of the polarized capacitor EC7 and the other end of the capacitor C60 respectively. The negative electrode of the polarized capacitor EC7 is grounded. The other end of the inductor L3 is electrically connected to pin 8 of the chip U5 and one end of the capacitor C24 respectively. The other end of the capacitor C24 is electrically connected to one end of the resistor R39. The other end of the resistor R39 is electrically connected to pin 9 of the chip U5.
4. The embedded small-sized intelligent fast charger according to claim 3, characterized in that The described intelligent charging recognition circuit includes chip U3, TYPE-C interface P3, bidirectional trigger diodes ESD1, ESD2, ESD3, ESD4, ESD8, MOS transistor Q4, detection terminals TP1, TP10, TP11, capacitors C20, C21, C23, C41, C42, C43, C44, C45, C46, C49, C54, C56, resistors R32, R34, R36, R37, R38, and resistor NTC1. The 2-pin of chip U3 is grounded. The 3-pin of chip U3 is electrically connected to one end of capacitor C49, and the other end of capacitor C49 is grounded. The 4-pin of chip U3 is electrically connected to the 23-pin of chip U1 and one end of capacitor C41 respectively, and the other end of capacitor C41 is grounded. The 5-pin of chip U3 is electrically connected to one end of resistor R32. The 7-pin of chip U3 is electrically connected to one end of resistor NTC1. The other end of resistor R32 is electrically connected to the other end of resistor NTC1, and the other end of resistor NTC1 is grounded. The 10-pin of chip U3 is electrically connected to one end of capacitor C43, and the other end of capacitor C43 is grounded. The 13-pin of chip U3 is electrically connected to one end of capacitor C44, and the other end of capacitor C44 is grounded. The 14-pin of chip U3 is electrically connected to one end of capacitor C42, and the other end of capacitor C42 is grounded. The 16-pin of chip U3 is electrically connected to one end of capacitor C56, and the other end of capacitor C56 is grounded. The 15-pin of chip U3 is electrically connected to the other end of resistor R64. The 33-pin of chip U3 is grounded. The 19-pin, 20-pin, and 21-pin of chip U3 are respectively electrically connected to the protection circuit. The 23-pin of chip U3 is electrically connected to one end of inductor L3 and one end of capacitor C46 respectively, and the other end of capacitor C46 is grounded. The 24-pin of chip U3 is electrically connected to one end of resistor R38. The other end of resistor R38 is electrically connected to one end of bidirectional trigger diode ESD1, the B7 pin of TYPE-C interface P3, and the A7 pin of TYPE-C interface P3 respectively. The 25-pin of chip U3 is electrically connected to one end of resistor R37. The other end of resistor R37 is electrically connected to one end of bidirectional trigger diode ESD2, the B6 pin of TYPE-C interface P3, and the A6 pin of TYPE-C interface P3 respectively. The 26-pin of chip U3 is electrically connected to one end of capacitor C54, one end of bidirectional trigger diode ESD3, and the B5 pin of TYPE-C interface P3 respectively.The 27th pin of the chip U3 is electrically connected to one end of the capacitor C20, one end of the bidirectional trigger diode ESD4, and the A5 pin of the TYPE-C interface P3. The other end of the bidirectional trigger diode ESD1 is electrically connected to the other end of the bidirectional trigger diode ESD2, the other end of the bidirectional trigger diode ESD3, and the other end of the bidirectional trigger diode ESD4. The other end of the bidirectional trigger diode ESD4 is grounded. The 28th pin of the chip U3 is electrically connected to one end of the capacitor C21, one end of the capacitor C23, one end of the bidirectional trigger diode ESD3, the A5 pin of the TYPE-C interface P3, the B4 pin of the TYPE-C interface P3, the A9 pin of the TYPE-C interface P3, the B8 pin of the TYPE-C interface P3, the detection terminal TP1, and the 1st pin of the MOS transistor Q4. The other end of the capacitor C54 is electrically connected to the other end of the capacitor C20, the other end of the capacitor C21, and the other end of the capacitor C23. The other end of the capacitor C54 is grounded. The other end of the bidirectional trigger diode ESD3 is grounded. The 29th pin of the chip U3 is electrically connected to the 3rd pin of the MOS transistor Q4. The 30th pin of the chip U3 is electrically connected to the 2nd pin of the MOS transistor Q4, the detection terminal TP11, and one end of the resistor R36. The 31st pin of the chip U3 is electrically connected to the detection terminal TP10, the positive electrode of the polar capacitor EC6, the other end of the resistor R36, and one end of the resistor R34. The 32nd pin of the chip U3 is electrically connected to one end of the resistor C45 and the other end of the resistor R34. The other end of the resistor C45 is grounded. The B1 pin of the TYPE-C interface P3 is electrically connected to the A12 pin of the TYPE-C interface P3. The B1 pin of the TYPE-C interface P3 is grounded. The A1 pin of the TYPE-C interface P3 is electrically connected to the B12 pin of the TYPE-C interface P3. The A1 pin of the TYPE-C interface P3 is grounded., 5. An embedded small-sized intelligent fast charger according to claim 4, characterized in that, The protection circuit described above includes a USB interface P4, a chip U6, a MOS transistor Q7, a MOS transistor Q8, a detection terminal TP12, a detection terminal TP13, a bidirectional trigger diode ESD5, a bidirectional trigger diode ESD6, a bidirectional trigger diode ESD7, a resistor R45, a resistor R49, a resistor R51, a resistor R53, a resistor R54, a resistor R55, a resistor R58, a resistor R59, a resistor R60, a resistor R61, a resistor R62, a resistor R63, a capacitor C40, a capacitor C53, a capacitor C59, and a diode D10. One end of the 5th pin of the chip U6 is electrically connected to one end of the resistor R63 and one end of the capacitor C53 respectively. The other end of the capacitor C53 is grounded. One end of the 4th pin of the chip U6 is electrically connected to one end of the resistor R55 and one end of the resistor R54 respectively. The other end of the resistor R55 is electrically connected to the 13th pin of the chip U3. One end of the 3rd pin of the chip U6 is electrically connected to the other end of the resistor R54 and one end of the resistor R53 respectively. The 2nd pin of the chip U6 is grounded. One end of the 1st pin of the chip U6 is electrically connected to one end of the resistor R51 and one end of the resistor R49 respectively. The other end of the resistor R51 is grounded. The other end of the resistor R53 is electrically connected to one end of the resistor R45 and the detection terminal TP13 respectively. One end of the resistor R45 is grounded. The other end of the resistor R45 is electrically connected to the detection terminal TP13, the other end of the resistor R49, the 0th pin of the USB interface P4, the 1st pin of the USB interface P4, one end of the bidirectional trigger diode ESD5, one end of the bidirectional trigger diode ESD6, and one end of the bidirectional trigger diode ESD7 respectively. The bidirectional trigger diode ESD7 is grounded. The 2nd pin of the USB interface P4 is electrically connected to the other end of the bidirectional trigger diode ESD5 and one end of the resistor R59 respectively. The other end of the resistor R59 is electrically connected to the 21st pin of the chip U3. The 2nd pin of the USB interface P4 is electrically connected to the other end of the bidirectional trigger diode ESD6 and one end of the resistor R58 respectively. The other end of the resistor R58 is electrically connected to the 20th pin of the chip U3. The 4th pin of the USB interface P4 is electrically connected to the 1st pin of the MOS transistor Q8, the negative pole of the diode D10, the other end of the bidirectional trigger diode ESD7, one end of the inductor L3, and one end of the capacitor C40 respectively. The positive pole of the diode D10 is electrically connected to the other end of the resistor R63. The other end of the capacitor C40 is electrically connected to the 2nd pin of the MOS transistor Q7. The 1st pin of the MOS transistor Q7 is electrically connected to one end of the resistor R62. The other end of the resistor R62 is electrically connected to the 19th pin of the chip U3. The 3rd pin of the MOS transistor Q7 is electrically connected to one end of the resistor R61. The other end of the resistor R61 is electrically connected to one end of the resistor R60, one end of the capacitor C59, and the 3rd pin of the MOS transistor Q7 respectively.The other end of the resistor R60 is electrically connected to the other end of the capacitor C59 and the pin 2 of the MOS transistor Q7 respectively.
6. A control method for an embedded small-size intelligent fast charger as described in claim 1, characterized in that, The control method is as follows: During use, first connect the power port AC to a three-phase power supply. Among them, the pin 1 of the power port AC is electrically connected to the N wire in the three-phase power supply, and the pin 2 of the power port AC is electrically connected to the L wire in the three-phase power supply; After that, select the corresponding charging interface according to the interface of the charging cable. After installing the charging cable, the intelligent charging recognition circuit will recognize the charging voltage required by the current charging cable; During the charging process, the intelligent charging recognition circuit will separately control the power conversion circuit 1 and the power conversion circuit 2 to perform power conversion on the power input from the power port AC according to the inserted charging cable, so as to obtain the required output voltage; The chip U1 and the MOS tube Q2 perform PWM drive signal switching, enabling the power supply to operate safely in the continuous conduction mode (CCM) under low-voltage AC input, and performing switching power conversion, thus realizing the adaptive zero-voltage switching (ZVS) function in the discontinuous conduction mode (CCM); After that, through the energy transfer of the transformer T1, safety isolation control is carried out to convert the input alternating current into the DC voltage required for device charging; After that, the output voltage is adjusted to 5V through the chip U5. At this time, the charging voltage and current can be 5V0 - 2.4A, 5V0 - 3A, 9V0 - 3A, 12V0 - 3A, 15V0 - 3A, 20V0 - 3A respectively. The above six voltages can greatly increase the power supply adaptability; Multiple output voltages and currents are realized to supply power to charging devices with different requirements; In addition, the output voltage or current is adjusted through the control of U3, and after a 10-minute fast charge at 1.4 times the rated power, it is reduced to the rated power again.