AC / DC adaptive charger

By designing an AC/DC compatible charger, the problem of chargers only being able to accept a single input was solved, enabling AC/DC switching and compatibility with multiple battery types, thus improving the charger's versatility and economy.

CN223462782UActive Publication Date: 2025-10-21NORIN NIGHT VISION CO LTD
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Patent Information

Application Number
CN202422825254.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-19
Publication Date
2025-10-21
Estimated Expiration
2034-11-19

AI Technical Summary

Technical Problem

Existing chargers can only achieve a fixed single input of AC or DC, and cannot be adapted to different types of batteries, resulting in poor versatility.

Method used

An AC/DC adapter charger was designed, comprising an AC/DC detection and control output module, a voltage and current detection and programmable control module, a communication module, and a control module. It realizes AC/DC switching input and determines the voltage and current output through information interaction, adapting to different types of batteries.

Benefits of technology

It realizes AC/DC switching input, adapts to the output of different types of batteries, and improves the versatility and economic value of the charger.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides an AC / DC adaptive charger, which has an AC / DC switching input function, can adapt to different types of batteries for output, and is good in universality. Comprising an AC / DC detection control output module which is connected with an AC power supply and a DC power supply and is used for detecting the type of an input power supply and enabling the input priority of the AC power supply to be higher than that of the DC power supply; the voltage and current detection and program control module is connected with the alternating current and direct current detection control output module and an adaptive battery, and is used for receiving the output voltage and current of the alternating current and direct current detection control output module and then outputting the corresponding voltage and current to the adaptive battery; the communication module is connected with the adaptive battery and is used for carrying out information interaction and determining voltage and current required by the adaptive battery; and the control module is connected with the voltage and current detection and program control module and the communication module, and is used for controlling the voltage and current detection and program control module to output the adaptive battery to the outside according to the interaction information.
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Description

TECHNICAL FIELD

[0001] The utility model relates to a charger technical field, concretely is a kind of AC-DC adapter. BACKGROUND

[0002] With the rapid economic development, the charger on the market is all input fixed, i.e. only AC or DC fixed single input can be realized, and only one type of battery can be adapted for output, therefore, the current charger is relatively single for battery pack adaptation type, and the versatility is not good. INVENTION CONTENTS

[0003] In view of the above problems, the utility model provides a kind of AC-DC adapter, it has AC-DC switching input function, and can adapt different types of battery and output, and the versatility is good.

[0004] The utility model adopts following technical scheme, a kind of AC-DC adapter, comprising:

[0005] AC-DC detection control output module is connected with AC power supply and DC power supply, for detecting input power type, and make the AC power supply input priority higher than the DC power supply;

[0006] Voltage current detection and program control module are connected with the AC-DC detection control output module and adaptation battery, for receiving the output voltage current of the AC-DC detection control output module and then output corresponding voltage current to the adaptation battery;

[0007] Communication module is connected with the adaptation battery, for information interaction, determine the voltage and current required by the adaptation battery;

[0008] Control module is connected with the voltage current detection and program control module and communication module, for controlling the voltage current detection and program control module to the external output of the adaptation battery according to interactive information.

[0009] Further, the AC / DC detection control output module comprises an optical coupler U1, a rectifier bridge D1, a voltage stabilizing tube ZD1, ZD2, a triode Q1, MOS tubes Q2-Q5, resistors R1-R9, capacitors C1-C3, one end of the resistor R1 and the capacitor C1 are connected to the zero line N, the 3-pin of the rectifier bridge D1 is connected to the live wire L, the other end of the resistor R1 and the capacitor C1 are connected and then connected to the 4-pin of the rectifier bridge D1, the 2-pin of the rectifier bridge D1 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to one end of the resistor R3, one end of the capacitor C2 and the negative electrode of the voltage stabilizing tube ZD2, the other end of the resistor R3 is connected to one end of the capacitor C3, one end of the resistor R4 and the 1-pin of the optical coupler U1, the 2-pin of the rectifier bridge D1 is connected to the positive electrode of the voltage stabilizing tube ZD2, the other end of the capacitors C2 and C3, the other end of the resistor R4 and the 2-pin of the optical coupler U1, the 4-pin of the optical coupler U1 is connected to one end of the resistors R6 and R7, the other end of the resistor R6 is connected to one end of the resistor R5 and the base of the triode Q1, the 3-pin of the optical coupler U1 is connected to the other end of the resistor R5 and the emitter of the triode Q1 and then grounded, the collector of the triode Q1 is connected to one end of the resistor R8, the other end of the resistor R7 is connected to the drain of the MOS tubes Q2 and Q3 and then connected to the DC power supply, the other end of the resistor R8 is connected to one end of the resistor R9, the gates of the MOS tubes Q2-Q5 and the positive electrode of the voltage stabilizing tube ZD1, the source of the MOS tube Q3 is connected to the negative electrode of the voltage stabilizing tube ZD1, the other end of the resistor R9, the source of the MOS tube Q5, the source of the MOS tube Q2 and the source of the MOS tube Q4, the drain of the MOS tube Q4 is connected to the drain of the MOS tube Q5;

[0010] Further, the voltage current detection and program control module includes resistors R10-R25, capacitors C4-C13, voltage stabilizing tubes ZD3, ZD4, program control power supply U2, current sensor U3, interface CN1, H1, triode Q6, MOS tubes Q7-Q10, the current sensor U3 adopts model CH70110CB3 chip, the control module includes controller U4, the controller adopts single-chip microcomputer; the negative pole of the voltage stabilizing tube ZD3 is connected with the 1 pin of the program control power supply U2 and then connected to the direct current power supply, the positive pole of the voltage stabilizing tube ZD3 is connected with the 2 pin of the program control power supply U2 and one end of the capacitor C4 and then grounded, the other end of the capacitor C4 is grounded, the 3 pin of the program control power supply U2 is connected with the 3, 4 pins of the current sensor U3, the 4 pin of the program control power supply U2 is connected with one end of the resistor R18, one end of the resistor R24, the emitter of the triode Q6 and the 2 pin of the interface H1 and then grounded, the other end of the resistor R24 is grounded, the 5 pin of the program control power supply U2 is connected with one end of the resistor R10 and one end of the capacitor C5, the other end of the resistor R10 is connected with one end of the resistor R11 and one end of the capacitor C6, the other ends of the capacitors C5, C6 are connected and then grounded, the other end of the resistor R11 is connected to the 17 pin of the controller U4, the 6 pin of the program control power supply U2 is connected with one end of the resistor R12 and one end of the capacitor C7, the other end of the resistor R12 is connected with one end of the resistor R13 and one end of the capacitor C8, the other ends of the capacitors C7, C8 are connected and then grounded, the other end of the resistor R13 is connected to the 16 pin of the controller U4; the 1, 2 pins of the current sensor U3 are connected with one end of the resistor R15 and the drain of the MOS tubes Q7, Q9, the 8 pin of the current sensor U3 is connected with one end of the capacitor C11 and then connected to the power supply 3.3V, the 7th pin of the current sensor U3 is connected with one end of the resistor R14, the other end of the resistor R14 is connected with one end of the capacitor C10 and then connected with the 14th pin of the controller U4, the 6th pin of the current sensor U3 is connected with one end of the capacitor C9, the 5th pin of the current sensor U3 is connected with the other end of the capacitor C9, C10, C11 and then connected with the ground, one end of the resistor R17 is connected with the 22nd pin of the controller U4, the other end of the resistor R17 is connected with the other end of the resistor R18 and the base of the triode Q6, the collector of the triode Q6 is connected with one end of the resistor R19, the other end of the resistor R15 is connected with the resistor R16 and one end of the resistor R25, the other end of the resistor R25 is connected with one end of the capacitor C12 and then connected with the 15th pin of the controller U4, the other end of the resistor R16 is connected with the other end of the capacitor C12 and then connected with the ground, the other end of the resistor R19 is connected with one end of the resistor R20, the gate of the MOS tube Q7, Q8, Q9, Q10 and the positive electrode of the voltage stabilizing tube ZD4, the source of the MOS tube Q7, Q9 is connected with the other end of the resistor R20, the negative electrode of the voltage stabilizing tube ZD4 and the source of the MOS tube Q10, the drain of the MOS tube Q8, Q10 is connected with one end of the resistor R21 and the 1st pin of the interface H1 and then connected with the drain of the MOS tube Q4; the other end of the resistor R21 is connected with the resistor R22 and one end of the resistor R23, the other end of the resistor R22 is connected with one end of the capacitor C13 and then connected with the 18th pin of the controller U4, the other end of the resistor R23 is connected with the other end of the capacitor C13 and then connected with the ground.

[0011] Further, the communication module comprises a communication chip U5, resistors R26-R33, capacitors C14 and C15, a diode D2, a suppression diode D3, an interface P1 and a transistor Q11, the communication chip U5 is an RS485 communication chip with model SIT3088EESA, the negative electrode of the diode D2 is connected to one end of the resistor R26 and then connected to the 30th pin of the controller U4, the positive electrode of the diode D2 is connected to the other end of the resistor R26, one end of the capacitor C14, one end of the resistor R27 and the base of the transistor Q11, the other end of the capacitor C14 and the other end of the resistor R27 and the emitter of the transistor Q11 are all connected and then grounded, the collector of the transistor Q11 is connected to one end of the resistor R28 and the 2nd and 3rd pins of the communication chip U5, the 1st pin of the communication chip U5 is connected to the 31st pin of the controller U4, the 4th pin of the communication chip U5 is connected to the 30th pin of the controller U4, the other end of the resistor R28 is connected to one end of the resistor R32, one end of the capacitor C15 and the 8th pin of the communication chip U5 and then connected to a power supply 3.3V, the other end of the capacitor C15 is connected to one end of the resistor R31, the 5th pin of the communication chip U5 and the 3rd pin of the suppression diode D3 and then grounded, the 7th pin of the communication chip U5 is connected to one end of the resistor R29, the 6th pin of the communication chip U5 is connected to one end of the resistor R30, the other end of the resistor R29 is connected to one end of the resistor R33, the other end of the resistor R31 and the 1st pin of the suppression diode D3 and then connected to the 1st pin of the interface P1, the other end of the resistor R30 is connected to the other ends of the resistors R32 and R33 and the 2nd pin of the suppression diode D3 and then connected to the 2nd pin of the interface P1.

[0012] The utility model discloses the beneficial effect is, it can carry out AC and DC detection through AC and DC detection control output module, and make AC power input priority higher than DC power, realize AC and DC switching input, and determine voltage and current detection and program control module to the external output voltage and current of adaptive battery after information interaction, thereby can adapt different type battery and output, and the versatility is good, has better economic use value. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the structural diagram of the utility model;

[0014] Figure 2 It is the circuit principle drawing of AC and DC detection control output module in the utility model;

[0015] Figure 3 It is the circuit principle drawing of voltage and current detection and program control module in the utility model;

[0016] Figure 4 It is the circuit principle drawing of control module in the utility model;

[0017] Figure 5 It is the circuit schematic of the communication module in the utility model. DETAILED DESCRIPTION

[0018] As Figures 1-5 shown, the alternating current-direct current adapter charger in the utility model, it includes:

[0019] The alternating current-direct current detection control output module is connected with the alternating current power supply and the direct current power supply, is used for detecting the input power supply type, and makes the alternating current power supply input priority higher than the direct current power supply;

[0020] The voltage current detection and program control module is connected with the alternating current-direct current detection control output module and the adaptive battery, is used for receiving the output voltage current of the alternating current-direct current detection control output module and then outputting corresponding voltage current to the adaptive battery;

[0021] The communication module is connected with the adaptive battery, is used for information interaction, and determines the voltage current required by the adaptive battery;

[0022] The control module is connected with the voltage current detection and program control module and the communication module, is used for controlling the voltage current detection and program control module to the external output of the adaptive battery according to the interaction information.

[0023] The alternating current-direct current detection control output module includes optocoupler U1, rectifier bridge D1, voltage stabilizing tube ZD1, ZD2, triode Q1, MOS tube Q2-Q5, resistor R1-R9, capacitor C1-C3, one end of resistor R1 and capacitor C1 is connected to the neutral line N, the 3-pin of rectifier bridge D1 is connected to the live wire L, the other end of resistor R1 and capacitor C1 is connected and then connected to the 4-pin of rectifier bridge D1, the 2-pin of rectifier bridge D1 is connected with one end of resistor R2, the other end of resistor R2 is connected with one end of resistor R3, one end of capacitor C2 and the negative electrode of voltage stabilizing tube ZD2, the other end of resistor R3 is connected with one end of capacitor C3, resistor R4 and the 1-pin of optocoupler U1, the 2-pin of rectifier bridge D1 is connected with the positive electrode of voltage stabilizing tube ZD2, the other end of capacitor C2 and C3, the other end of resistor R4 and the 2-pin of optocoupler U1, the 4-pin of optocoupler U1 is connected with one end of resistor R6 and R7, the other end of resistor R6 is connected with one end of resistor R5 and the base of triode Q1, the 3-pin of optocoupler U1 is connected with the other end of resistor R5 and the emitter of triode Q1 and then grounded, the collector of triode Q1 is connected with one end of resistor R8, the other end of resistor R7 is connected with the drain of MOS tube Q2 and Q3 and then connected with the direct current power supply (i.e. Figure 2The other end of the resistor R8 is connected with the one end of the resistor R9, the gate of the MOS tubes Q2, Q3, Q4 and Q5, and the positive pole of the voltage stabilizing tube ZD1. The source of the MOS tube Q3 is connected with the negative pole of the voltage stabilizing tube ZD1, the other end of the resistor R9, the source of the MOS tube Q5, the source of the MOS tube Q2, and the source of the MOS tube Q4. The drain of the MOS tube Q4 is connected with the drain of the MOS tube Q5.

[0024] The voltage and current detection and program control module feeds back to the control module after receiving the output voltage and current of the AC / DC detection and control output module. The control module detects whether the voltage and current detection and program control module outputs correct voltage and current according to the received interaction information. The voltage and current detection and program control module comprises resistors R10-R25, capacitors C4-C13, voltage stabilizing tubes ZD3 and ZD4, program control power supply U2, current sensor U3, interface CN1, H1, triode Q6, and MOS tubes Q7-Q10. The current sensor U3 adopts CH70110CB3 chip, and the program control power supply U2 adopts existing power supply chip, which can adopt IT6722A of ITECH, TDA305 of TESAN, DP6020 of MESTEK, etc. The control module comprises controller U4, which adopts existing single-chip microcomputer, such as STC89C51 single-chip microcomputer. The negative electrode of the voltage stabilizing tube ZD3 and the 1 pin of the program control power supply U2 are connected and connected to the DC power supply. The positive electrode of the voltage stabilizing tube ZD3 and the 2 pin of the program control power supply U2 and one end of the capacitor C4 are connected and connected to the ground. The other end of the capacitor C4 is connected to the ground. The 3 pin of the program control power supply U2 is connected with the 3 and 4 pins of the current sensor U3. The 4 pin of the program control power supply U2 is connected with one end of the resistor R18, one end of the resistor R24, the emitter of the triode Q6, and the 2 pin of the interface H1, and then connected to the ground. The other end of the resistor R24 is connected to the ground. The 5 pin of the program control power supply U2 is connected with one end of the resistor R10 and one end of the capacitor C5. The other end of the resistor R10 is connected with one end of the resistor R11 and one end of the capacitor C6. The other ends of the capacitors C5 and C6 are connected and connected to the ground. The other end of the resistor R11 is connected to the 17 pin of the controller U4. The 6 pin of the program control power supply U2 is connected with one end of the resistor R12 and one end of the capacitor C7. The other end of the resistor R12 is connected with one end of the resistor R13 and one end of the capacitor C8. The other ends of the capacitors C7 and C8 are connected and connected to the ground. The other end of the resistor R13 is connected to the 16 pin of the controller U4. The 1 and 2 pins of the current sensor U3 are connected with one end of the resistor R15, the drain of the MOS tube Q7, and the drain of the MOS tube Q9. The 8 pin of the current sensor U3 is connected with one end of the capacitor C11 and then connected to the power supply 3.3V, the 7th pin of the current sensor U3 is connected with one end of the resistor R14, the other end of the resistor R14 is connected with one end of the capacitor C10 and then connected with the 14th pin of the controller U4, the 6th pin of the current sensor U3 is connected with one end of the capacitor C9, the 5th pin of the current sensor U3 is connected with the other end of the capacitor C9, C10, C11 and then connected with the ground, one end of the resistor R17 is connected with the 22nd pin of the controller U4, the other end of the resistor R17 is connected with the other end of the resistor R18 and the base of the triode Q6, the collector of the triode Q6 is connected with one end of the resistor R19, the other end of the resistor R15 is connected with the resistor R16 and one end of the resistor R25, the other end of the resistor R25 is connected with one end of the capacitor C12 and then connected with the 15th pin of the controller U4, the other end of the resistor R16 is connected with the other end of the capacitor C12 and then connected with the ground, the other end of the resistor R19 is connected with one end of the resistor R20, the gate of the MOS tube Q7, Q8, Q9, Q10 and the positive pole of the voltage stabilizing tube ZD4, the source of the MOS tube Q7, Q9 is connected with the other end of the resistor R20, the negative pole of the voltage stabilizing tube ZD4 and the source of the MOS tube Q10, the drain of the MOS tube Q8, Q10 is connected with one end of the resistor R21 and the 1st pin of the interface H1 and then connected with the drain of the MOS tube Q4; the other end of the resistor R21 is connected with one end of the resistor R22, R23, the other end of the resistor R22 is connected with one end of the capacitor C13 and then connected with the 18th pin of the controller U4, the other end of the resistor R23 is connected with the other end of the capacitor C13 and then connected with the ground.

[0025] The communication module comprises a communication chip U5, resistors R26-R33, capacitors C14 and C15, a diode D2, a suppression diode D3, an interface P1 and a transistor Q11, wherein the communication chip U5 is an RS485 communication chip with the model SIT3088EESA; the negative electrode of the diode D2 is connected to one end of the resistor R26 and then connected to the 30th pin of the controller U4, the positive electrode of the diode D2 is connected to the other end of the resistor R26, one end of the capacitor C14, one end of the resistor R27 and the base of the transistor Q11, the other end of the capacitor C14 and the other end of the resistor R27 and the emitter of the transistor Q11 are all connected and then grounded, the collector of the transistor Q11 is connected to one end of the resistor R28 and the 2nd and 3rd pins of the communication chip U5, the 1st pin of the communication chip U5 is connected to the 31st pin of the controller U4, the 4th pin of the communication chip U5 is connected to the 30th pin of the controller U4, the other end of the resistor R28 is connected to one end of the resistor R32, one end of the capacitor C15 and the 8th pin of the communication chip U5 and then connected to the power supply 3.3V, the other end of the capacitor C15 is connected to one end of the resistor R31, the 5th pin of the communication chip U5 and the 3rd pin of the suppression diode D3 and then grounded, the 7th pin of the communication chip U5 is connected to one end of the resistor R29, the 6th pin of the communication chip U5 is connected to one end of the resistor R30, the other end of the resistor R29 is connected to one end of the resistor R33, the other end of the resistor R31 and the 1st pin of the suppression diode D3 and then connected to the 1st pin of the interface P1, the other end of the resistor R30 is connected to the other ends of the resistors R32 and R33 and the 2nd pin of the suppression diode D3 and then connected to the 2nd pin of the interface P1; the utility model discloses a communication chip U5 is completed with the outside battery or the interaction of equipment, and the interface P1 is connected with the adaptive battery.

[0026] The utility model has ac-dc switching function, and the priority of ac input is higher than dc input, and another control output (namely the output formed by voltage current detection and program control module, communication module, control module connection) is connected to the output end of ac-dc detection control output module, and then realizes double -way output, namely has two identical control outputs, and can complete the adaptive output or adaptive charging of different equipment or battery group according to different interactive information, the working principle of the utility model is that when ac-dc detection control output module detects that there is ac power input, rectifier bridge D1 drives optocoupler U1 through voltage stabilizing pipe ZD2, thereby drives triode Q1 to close, and then drives MOS tube Q2~Q5 to close, and dc power will be disconnected, and the subsequent output will be powered by ac power, when ac-dc detection control output module does not detect ac power input, rectifier bridge D1 has no output, optocoupler U1 is closed, and triode Q1 will open, thereby drives MOS tube Q2~Q5 to open, and then dc output opens, and the subsequent output will be powered by dc power.

[0027] The controller U4 detects the output voltage of the voltage and current detection and program control module and the voltage of the external battery or battery pack through the 15th pin (namely the MKV_ADC end) and the 18th pin (namely the CHGV_ADC end) respectively; the controller U4 controls the output of the program control power supply U2 through the 17th pin (namely the IADJ end) and the 16th pin (namely the VADJ end); the controller U4 detects the output current of the voltage and current detection and program control module through the 14th pin (namely the CHGI_ADC end); and the controller U4 controls the triode Q6 through the 22nd pin (namely the CHG_CON end), so as to drive the MOS tubes Q7, Q8, Q9 and Q10 to output externally and to adaptively charge the 1-8 series battery packs.

[0028] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims. Any reference numerals in the claims should not be deemed to limit the claims involved.

[0029] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. An AC / DC adapter charger, characterized by: The application relates to an AC / DC detection control output module, a voltage and current detection and program control module, a communication module and a control module. The AC / DC detection control output module comprises an optical coupler U1, a rectifier bridge D1, a voltage stabilizing tube ZD1, a voltage stabilizing tube ZD2, a triode Q1, MOS tubes Q2-Q5, resistors R1-R9 and capacitors C1-C3. The one end of the resistor R1 and the one end of the capacitor C1 are connected to a zero line N. The 3-pin of the rectifier bridge D1 is connected to a live wire L. The other end of the resistor R1 and the other end of the capacitor C1 are connected to the 4-pin of the rectifier bridge D1.

2. The AC / DC adapter charger of claim 1, wherein: The 2-pin of the rectifier bridge D1 is connected to the one end of the resistor R2. The other end of the resistor R2, the one end of the resistor R3, the one end of the capacitor C2 and the negative electrode of the voltage stabilizing tube ZD2 are connected. The other end of the resistor R3, the one end of the capacitor C3 and the one end of the resistor R4 are connected to the 1-pin of the optical coupler U1. The 2-pin of the rectifier bridge D1, the positive electrode of the voltage stabilizing tube ZD2, the other end of the capacitors C2 and C3, the other end of the resistor R4 and the 2-pin of the optical coupler U1 are connected. The 4-pin of the optical coupler U1 is connected to the one end of the resistors R6 and R7. The other end of the resistor R6, the one end of the resistor R5 and the base of the triode Q1 are connected. The 3-pin of the optical coupler U1, the other end of the resistor R5 and the emitter of the triode Q1 are connected to the ground. The one end of the resistor R8 is connected to the one end of the resistor R9, the gate of the MOS tubes Q2-Q5 and the positive electrode of the voltage stabilizing tube ZD1. The source of the MOS tube Q3 is connected to the negative electrode of the voltage stabilizing tube ZD1, the other end of the resistor R9, the source of the MOS tube Q5, the source of the MOS tube Q2 and the source of the MOS tube Q4. The drain of the MOS tube Q4 is connected to the drain of the MOS tube Q5.

3. An AC / DC adapter charger according to claim 2, characterized in that: The voltage current detection and program control module includes resistors R10-R25, capacitors C4-C13, voltage stabilizing tubes ZD3, ZD4, program control power supply U2, current sensor U3, interface CN1, H1, triode Q6, MOS tubes Q7-Q10, the current sensor U3 adopts model CH70110CB3 chip, the control module includes controller U4, the controller adopts single-chip microcomputer; the negative pole of the voltage stabilizing tube ZD3 is connected with the 1 pin of the program control power supply U2 and then connected to the direct current power supply, the positive pole of the voltage stabilizing tube ZD3 is connected with the 2 pin of the program control power supply U2 and one end of the capacitor C4 and then grounded, the other end of the capacitor C4 is grounded, the 3 pin of the program control power supply U2 is connected with the 3, 4 pins of the current sensor U3, the 4 pin of the program control power supply U2 is connected with one end of the resistor R18, one end of the resistor R24, the emitter of the triode Q6 and the 2 pin of the interface H1 and then grounded, the other end of the resistor R24 is grounded, the 5 pin of the program control power supply U2 is connected with one end of the resistor R10 and one end of the capacitor C5, the other end of the resistor R10 is connected with one end of the resistor R11 and one end of the capacitor C6, the other ends of the capacitors C5, C6 are connected and then grounded, the other end of the resistor R11 is connected to the 17 pin of the controller U4, the 6 pin of the program control power supply U2 is connected with one end of the resistor R12 and one end of the capacitor C7, the other end of the resistor R12 is connected with one end of the resistor R13 and one end of the capacitor C8, the other ends of the capacitors C7, C8 are connected and then grounded, the other end of the resistor R13 is connected to the 16 pin of the controller U4; the 1, 2 pins of the current sensor U3 are connected with one end of the resistor R15 and the drain of the MOS tubes Q7, Q9, the 8 pin of the current sensor U3 is connected with one end of the capacitor C11 and then connected to the power supply 3.3V, the 7th pin of the current sensor U3 is connected with one end of the resistor R14, the other end of the resistor R14 is connected with one end of the capacitor C10 and then connected with the 14th pin of the controller U4, the 6th pin of the current sensor U3 is connected with one end of the capacitor C9, the 5th pin of the current sensor U3 is connected with the other end of the capacitor C9, C10, C11 and then connected with the ground, one end of the resistor R17 is connected with the 22nd pin of the controller U4, the other end of the resistor R17 is connected with the other end of the resistor R18 and the base of the triode Q6, the collector of the triode Q6 is connected with one end of the resistor R19, the other end of the resistor R15 is connected with the resistor R16 and one end of the resistor R25, the other end of the resistor R25 is connected with one end of the capacitor C12 and then connected with the 15th pin of the controller U4, the other end of the resistor R16 is connected with the other end of the capacitor C12 and then connected with the ground, the other end of the resistor R19 is connected with one end of the resistor R20, the gate of the MOS tube Q7, Q8, Q9, Q10 and the positive electrode of the voltage stabilizing tube ZD4, the source of the MOS tube Q7, Q9 is connected with the other end of the resistor R20, the negative electrode of the voltage stabilizing tube ZD4 and the source of the MOS tube Q10, the drain of the MOS tube Q8, Q10 is connected with one end of the resistor R21 and the 1st pin of the interface H1 and then connected with the drain of the MOS tube Q4; the other end of the resistor R21 is connected with the resistor R22 and one end of the resistor R23, the other end of the resistor R22 is connected with one end of the capacitor C13 and then connected with the 18th pin of the controller U4, the other end of the resistor R23 is connected with the other end of the capacitor C13 and then connected with the ground.

4. An AC / DC adapter charger according to claim 3, characterized in that: The communication module includes communication chip U5, resistance R26~R33, capacitor C14, C15, diode D2, suppression diode D3, interface P1, triode Q11, the communication chip U5 uses model SIT3088EESA RS485 communication chip; The negative pole of diode D2 is connected with one end of resistance R26 and then connected to the 30 pin of the controller U4, the positive pole of diode D2 is connected with the other end of resistance R26, one end of capacitor C14, one end of resistance R27 and the base of triode Q11, the other end of capacitor C14 and the other end of resistance R27 and the emitter of triode Q11 are all connected and then grounded, the collector of triode Q11 is connected with one end of resistance R28 and the 2, 3 pin of communication chip U5, the 1 pin of communication chip U5 is connected with the 31 pin of controller U4, the 4 pin of communication chip U5 is connected with the 30 pin of controller U4, the other end of resistance R28 is connected with one end of resistance R32, one end of capacitor C15 and the 8 pin of communication chip U5 and then connected with power supply 3.3V, the other end of capacitor C15 is connected with one end of resistance R31, the 5 pin of communication chip U5 and the 3 pin of suppression diode D3 and then grounded, the 7 pin of communication chip U5 is connected with one end of resistance R29, the 6 pin of communication chip U5 is connected with one end of resistance R30, the other end of resistance R29 is connected with one end of resistance R33, the other end of resistance R31 and the 1 pin of suppression diode D3 and then connected with the 1 pin of interface P1, the other end of resistance R30 is connected with the other end of resistance R32, R33 and the 2 pin of suppression diode D3 and then connected with the 2 pin of interface P1.