A charging control circuit for a reel
By combining the design of MCU control circuit, charging current value switching circuit and battery detection circuit, the problem of the impact of charging current on battery life and inaccurate switching is solved, and safe and efficient charging control is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU TONNY ELECTRIC & TOOLS
- Filing Date
- 2025-03-30
- Publication Date
- 2026-07-21
AI Technical Summary
While existing charging control circuits improve charging efficiency, excessively high charging currents may damage battery lifespan, and the switching of charging current is not fast or accurate enough.
The design employs a combination of MCU control circuit, charging current value switching circuit, battery detection circuit, and DC/DC voltage conversion circuit. By connecting specific resistors and operational amplifiers with wires, it achieves fast and accurate switching of charging current and adjusts the charging current value based on the battery status.
While ensuring charging safety and efficiency, it reduces the impact of charging current on battery life and achieves rapid and accurate switching of charging current, thus improving charging performance.
Smart Images
Figure CN224537802U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of charging control technology, specifically relating to a conveniently stored winding reel charging control circuit. Background Technology
[0002] CN 204681141 U, entitled "A Charging Control Circuit", includes a three-phase power frequency rectifier bridge. The input terminal of the three-phase power frequency rectifier bridge is connected to a three-phase power supply. The positive terminal of the output terminal of the three-phase power frequency rectifier bridge is connected sequentially through inductor L3 and fuse F1 to the positive terminal of the thyristor module Q1, one end of capacitor C29, and one end of resistor R33. The control terminal of Q1 is connected to one end of the primary winding of transformer T1 through resistor R23. The other end of the primary winding of T1 is connected to one end of resistor R24 and one end of resistor R26. The other ends of R24 and R26, the cathode of Q1, one end of resistor R29, one end of resistor R31, one end of resistor R32, one end of resistor R30, the positive terminals of capacitors C31, C32, C33, and C34, one end of capacitor C35, one end of capacitor C36, and an IGBT. The following connections are made: Collector of module Q2, power supply VCC, one end of capacitor C24, one end of capacitor C25, one end of capacitor C28; the other end of resistor R29, the other end of resistor R31, the other end of resistor R32, the other end of capacitor C29, the other end of resistor R33; the other end of resistor R30, negative terminals of capacitors C31, C32, C33, and C34; one end of resistor R36, positive terminals of capacitors C38, C39, C40, and C41; the other end of resistor R36, negative terminals of capacitors C38, C39, C40, and C41; negative terminal of the output of the three-phase power frequency rectifier bridge; ground GND2; one end of resistor R37; anode of Zener diode D15; emitter of IGBT module Q3; one end of capacitor C42; capacitor C43. One end of capacitor C44 is connected to the drive signal input terminal PB-. The other end of capacitor C42 is connected to the other end of capacitor C43, the other end of capacitor C44, the other end of capacitor C24, the other end of capacitor C25, the other end of capacitor C28, and one end of the first secondary side of T1. The other end of the first secondary side of T1 is connected to the emitter of Q2, the collector of Q3, the positive terminal of Zener diode D10, and one end of resistor R28 is connected to the drive signal input terminal PA-. The other end of R28 is connected to the negative terminal of D10, the base of Q2, and one end of resistor R27. The other end of R27 is connected to the drive signal input terminal PA+. The other end of R37 is connected to the cathode of D15, the base of Q3, and one end of resistor R35. The other end of R35 is connected to the drive signal input terminal PB+.One end of the second secondary side of T1 is connected to one end of capacitor C37 and the positive terminal of diode D11. The other end of C37 is connected through resistor R34 to the negative terminal of D11, one end of inductor L4, the negative terminal of diode D19, and one end of resistor R46. The other end of R46 is connected through capacitor C51 to one end of the third secondary side of T1 and the positive terminal of D19. The other end of the third secondary side of T1 is connected to the other end of the second secondary side of T1, the negative terminals of capacitors C45, C46, C47, and C48, ground GND1, and the negative terminal of the first current sensor input. The positive terminal of the first current sensor input is connected to port V1, the positive terminals of C45, C46, C47, and C48, and the other end of L4. The output terminal of the first current sensor is connected through resistor R39 to one end of R40, the cathode of Zener diode D16, and the detection terminal ADC2. The circuit is connected as follows: the other end of R40, the anode of D16, ground GND, and the ground terminal of the first current sensor are connected; the power supply terminal of the first current sensor is connected to a +5V power supply; the power supply VCC is connected to the positive terminal of the input terminal of the second current sensor, the negative terminal of the input terminal of the second current sensor is grounded to GND2, and the power supply terminal of the second current sensor is connected to a +5V power supply; the output terminal of the second current sensor is connected to one end of resistor R43, the cathode of Zener diode D17, and the detection terminal ADC3 through resistor R42; the other end of R43, the anode of D17, the ground terminal of the second current sensor, and ground GND are connected; the port V1 is connected to the drain of MOSFET Q5 and the drain of MOSFET Q4; the gate of Q5 is connected to one end of resistor R45, one end of R47, and the cathode of Zener diode D20; the other end of R45 is connected to the drive signal port PWM1; the other end of R47, the anode of D20, the source of Q5, and contactor K2 are connected to the circuit. One end of the first switch is connected to the positive terminal of the first group of batteries and the drive signal port Load. The other end of the first switch K2 is connected to the detection port moto. One end of the second switch of contactor K2 is connected to the detection port FB2, and the other end of the second switch of contactor K2 is connected to the +15V power supply. The gate of Q4 is connected to one end of resistor R41, one end of R44, and the cathode of Zener diode D18. The other end of R41 is connected to the drive signal port PWM2. The other end of R44, the anode of D18, the source of Q4, one end of the first switch of contactor K1, the positive terminal of the second group of batteries, and the drive signal port PWM2- are connected. The other end of the first switch of contactor K1 is connected to the detection port moto. One end of the second switch of contactor K1 is connected to the detection port FB1, and the other end of the second switch of contactor K1 is connected to the +15V power supply.The negative terminals of the first and second sets of batteries are connected to the positive terminal of the third current sensor input. The negative terminal of the third current sensor input is connected to ground GND1, and the ground terminal of the third current sensor is connected to ground GND. The power supply terminal of the third current sensor is connected to a +5V power supply. The output terminal of the third current sensor is connected to one end of capacitor C52 and one end of resistor R48. The other end of C52 is connected to one end of resistor R49, the anode of Zener diode D22, and ground GND. The other end of R48 is connected to the detection terminal ADC1, the other end of R49, and the cathode of D22. The positive terminal of the output of the three-phase power frequency rectifier bridge is connected sequentially through inductor L3, fuse F1, and diode D5 to the positive terminal of the thyristor module Q1, one end of capacitor C29, and one end of resistor R33. The other ends of capacitors C42, C43, C44, C24, C25, and C28, and one end of capacitor C30 are connected. The other end of capacitor C30 is connected to one end of the first secondary side of T1. L3 uses a 10mH inductor, and R23 and R24 use 1K resistors. Its drawback is that while this charging control circuit coordinates the series-parallel conversion of the battery pack through K1 and K2 to achieve complementary PWM waveforms for efficient charging of the two battery strings, thereby improving charging efficiency and shortening charging time, the excessively high charging current in this charging mode may damage the battery, thus affecting its lifespan. Utility Model Content
[0003] Design objective: To overcome the shortcomings of the prior art, this paper designs a convenient winding reel charging control circuit that not only ensures charging safety and efficiency while reducing the impact of charging current on battery life, but also provides fast and accurate charging current switching and better performance.
[0004] Design scheme: To achieve the above design objectives.
[0005] 1. The design of connecting pin 3 of the control chip in the MCU control circuit to one end of resistor R45 in the charging current value switching circuit via a wire, connecting pin 5 of the control chip in the MCU control circuit to one end of resistor R40 in the charging current value switching circuit via a wire, connecting pin 14 of the control chip in the MCU control circuit to one end of resistor R53 in the charging current value switching circuit via a wire, connecting the negative terminal of diode D10 in the DC / DC voltage conversion circuit to the output terminal of operational amplifier 1B and one end of capacitor C22 in the charging current value switching circuit via a wire, and connecting the negative terminal of diode D9 in the DC / DC voltage conversion circuit to the output terminal of operational amplifier 1D and one end of capacitor C20 in the charging current value switching circuit via a wire, is one of the technical features of this utility model. The purpose of this design is as follows: pin 3 of the control chip in the MCU control circuit is electrically connected to one end of resistor R45 in the charging current value switching circuit via a wire; pin 5 of the control chip in the MCU control circuit is electrically connected to one end of resistor R40 in the charging current value switching circuit via a wire; pin 14 of the control chip in the MCU control circuit is electrically connected to one end of resistor R53 in the charging current value switching circuit via a wire; the negative terminal of diode D10 in the DC / DC voltage conversion circuit is electrically connected to the output terminal of operational amplifier 1B and one end of capacitor C22 in the charging current value switching circuit via a wire; the negative terminal of diode D9 in the DC / DC voltage conversion circuit is electrically connected to the output terminal of operational amplifier 1D and one end of capacitor C20 in the charging current value switching circuit via a wire. This application, by combining the charging current value switching circuit with the battery detection circuit, can switch the charging current value in different battery states and charging stages, thus ensuring charging safety and efficiency while reducing the impact of charging current on battery life.
[0006] 2. The positive input terminal of operational amplifier 1B in the charging current value switching circuit is electrically connected to one end of each of two resistors R53, one end of a capacitor C27, and one end of another resistor R57 via wires. The other end of one resistor R53 is electrically connected to pin 14 of the control chip via a wire, and the other end of the other resistor R53 is electrically connected to the +3.3V connection terminal in the MCU power supply circuit via a wire. The other ends of resistor R57 and capacitor C27 are grounded via wires. The negative input terminal of operational amplifier 1B is connected to one end of resistor R45, one end of resistor R52, and capacitor C25 via wires. One end of resistor R45 is electrically connected to the other end of capacitor C22. The other end of resistor R45 is electrically connected to the V+ terminal of the DC / DC voltage conversion circuit via a wire. The other ends of resistor R52 and capacitor C25 are grounded via wires. The positive input terminal of operational amplifier 1D in the charging current value switching circuit is electrically connected to one end of resistor R47, one end of resistor R55, one end of resistor R48, one end of resistor R41, one end of resistor R43, and one end of capacitor C26 via wires. The other ends of resistor R47 and resistor R48 are connected to the +3 terminal of the MCU power supply circuit via wires.The 3V connection terminal provides electrical connection. The other ends of resistor R55 and capacitor C26 are grounded via wires. The other end of resistor R41 is electrically connected to the collector of transistor Q6 via a wire. The base of transistor Q6 is electrically connected to one end of resistor R40 and one end of resistor R36 via wires. The other end of resistor R40 is electrically connected to pin 5 of the control chip in the MCU control circuit via a wire. The emitter of transistor Q6 and the other end of resistor R36 are grounded via wires. Resistor R43... The other end is electrically connected to the collector terminal of transistor Q7 via a wire. The base terminal of transistor Q7 is electrically connected to one end of resistor R45 and one end of resistor R37 via wires. The other end of resistor R45 is electrically connected to pin 3 of the control chip in the MCU control circuit via a wire. The emitter terminal of transistor Q7 and the other end of resistor R37 are grounded via wires. The negative input terminal of operational amplifier 1D is connected to the other end of capacitor C20, one end of capacitor C21, one end of resistor R34, and operational amplifier 1A via wires. The positive input terminal of the capacitor R34 is electrically connected to one end of the resistor R38 and one end of the resistor R39 via wires. The other ends of the capacitor C21, resistor R38, and resistor R39 are grounded via wires. The other end of the resistor R34 is electrically connected to the Vbt- terminal in the battery detection circuit via a wire. The negative input terminal of the operational amplifier 1A is electrically connected to one end of the resistor R42, resistor R30, and capacitor C18 via wires. The other end of the resistor R42 is... The operational amplifier 1A is grounded via wires. Its output terminal is electrically connected to the other end of resistor R30, the other end of capacitor C18, and one end of resistor R28 via wires. The other end of resistor R28 is electrically connected to one end of capacitor C18 via a wire, and the other end of capacitor C18 is grounded via a wire. The positive power supply terminal of operational amplifier 1A is electrically connected to the V+ connection terminal in the DC / DC voltage conversion circuit via a wire. The negative power supply terminal of operational amplifier 1A is grounded via a wire. This design is the second technical feature of this utility model. The purpose of this design is that the positive input terminal of operational amplifier 1B in the charging current value switching circuit is electrically connected to one end of each of two resistors R53, one end of capacitor C27, and one end of resistor R57 via wires. The other end of one resistor R53 is electrically connected to pin 14 of the control chip via a wire, and the other end of the other resistor R53 is connected to the +3 pin in the MCU power supply circuit via a wire.The 3V connection terminal provides electrical connection. The other ends of resistor R57 and capacitor C27 are grounded via wires. The negative input terminal of operational amplifier 1B is electrically connected to one end of resistor R45, one end of resistor R52, one end of capacitor C25, and the other end of capacitor C22 via wires. The other end of resistor R45 is electrically connected to the V+ connection terminal in the DC / DC voltage conversion circuit via wires. The other ends of resistor R52 and capacitor C25 are grounded via wires. The positive input terminal of operational amplifier 1D in the charging current value switching circuit is electrically connected to one end of resistor R47, one end of resistor R55, one end of resistor R48, one end of resistor R41, one end of resistor R43, and one end of capacitor C26 via wires. The other ends of resistor R47 and resistor R48 are connected to the +3V connection terminal in the MCU power supply circuit via wires.The 3V connection terminal provides electrical connection. The other ends of resistor R55 and capacitor C26 are grounded via wires. The other end of resistor R41 is electrically connected to the collector of transistor Q6 via a wire. The base of transistor Q6 is electrically connected to one end of resistor R40 and one end of resistor R36 via wires. The other end of resistor R40 is electrically connected to pin 5 of the control chip in the MCU control circuit via a wire. The emitter of transistor Q6 and the other end of resistor R36 are grounded via wires. The other end of resistor R43... The transistor Q7 is electrically connected to its collector terminal via a wire. The base terminal of Q7 is electrically connected to one end of resistor R45 and one end of resistor R37 via wires. The other end of resistor R45 is electrically connected to pin 3 of the control chip in the MCU control circuit via a wire. The emitter terminal of transistor Q7 and the other end of resistor R37 are grounded via wires. The negative input terminal of operational amplifier 1D is electrically connected to the other end of capacitor C20, one end of capacitor C21, one end of resistor R34, and the positive input terminal of operational amplifier 1A via wires. The connection is as follows: the other end of resistor R34 is electrically connected to one end of resistor R38 and one end of resistor R39 via wires; the other ends of capacitor C21, resistor R38, and resistor R39 are grounded via wires; the other end of resistor R34 is electrically connected to the Vbt- terminal in the battery detection circuit via a wire; the negative input terminal of operational amplifier 1A is electrically connected to one end of resistor R42, one end of resistor R30, and one end of capacitor C18 via wires; the other end of resistor R42 is grounded via a wire. The output terminal of operational amplifier 1A is electrically connected via wires to the other end of resistor R30, the other end of capacitor C18, and one end of resistor R28, respectively. The other end of resistor R28 is electrically connected via a wire to one end of capacitor C18, and the other end of capacitor C18 is grounded via a wire. The positive power supply terminal of operational amplifier 1A is electrically connected via a wire to the V+ terminal of the DC / DC voltage conversion circuit, and the negative power supply terminal of operational amplifier 1A is grounded via a wire. This charging current switching circuit structure enables rapid and accurate switching of the charging current.
[0007] 3. In the battery detection circuit, the negative terminal of diode D10 is electrically connected to the source terminal of field-effect transistor Q7 and one end of resistor R12 via wires. The gate terminal of field-effect transistor Q7 and the other end of resistor R12 are electrically connected to one end of resistor R16 via wires. The other end of resistor R16 is electrically connected to the collector terminal of transistor Q2 via wires. The base terminal of transistor Q2 is electrically connected to one end of resistor R21 and one end of resistor R23 via wires. The emitter terminal of transistor Q2 and the other end of resistor R23 are grounded via wires. The other end of resistor R21 is electrically connected to the corresponding pin of the control chip in the MCU control circuit via wires. The drain terminal of field-effect transistor Q7 is connected to the corresponding terminal of transformer T3, the negative terminal of diode D9, and the positive terminal of diode D11 via wires. The design incorporates several key features of this invention. Specifically, the positive terminal of diode D9 is connected to one end of resistor R19 via a wire, and the other end of resistor R19 is connected to one end of resistor R26 via a wire. The other end of resistor R26 is connected to the corresponding pin of the control chip in the MCU control circuit via a wire. The negative terminal of diode D11 is connected to one end of resistor R6 via a wire. The other end of resistor R6 is connected to one end of another resistor R6 and the negative terminal of diode D7 via a wire. The other end of another resistor R6 is connected to one end of resistor R20, one end of capacitor C9, and the corresponding pin of the control chip in the MCU control circuit via a wire. The design also grounds the positive terminal of diode D7, the other end of resistor R20, and the other end of capacitor C9 via a wire.The purpose of this design is as follows: the negative terminal of diode D10 in the battery detection circuit is electrically connected to the source terminal of field-effect transistor Q7 and one end of resistor R12 via wires; the gate terminal of field-effect transistor Q7 and the other end of resistor R12 are electrically connected to one end of resistor R16 via wires; the other end of resistor R16 is electrically connected to the collector terminal of transistor Q2 via wires; the base terminal of transistor Q2 is electrically connected to one end of resistor R21 and one end of resistor R23 via wires; the emitter terminal of transistor Q2 and the other end of resistor R23 are grounded via wires; the other end of resistor R21 is electrically connected to the corresponding pin of the control chip in the MCU control circuit via wires; the drain terminal of field-effect transistor Q7 is electrically connected to the corresponding terminal of transformer T3, the negative terminal of diode D9, and the positive terminal of diode D11 via wires; the diode D... The positive terminal of diode D9 is electrically connected to one end of resistor R19 via a wire, and the other end of resistor R19 is electrically connected to one end of resistor R26 via a wire. The other end of resistor R26 is electrically connected to the corresponding pin of the control chip in the MCU control circuit via a wire. The negative terminal of diode D11 is electrically connected to one end of resistor R6 via a wire. The other end of resistor R6 is electrically connected to one end of another resistor R6 and the negative terminal of diode D7 via a wire. The other end of another resistor R6 is electrically connected to one end of resistor R20, one end of capacitor C9, and the corresponding pin of the control chip in the MCU control circuit via a wire. The positive terminal of diode D7, the other end of resistor R20, and the other end of capacitor C9 are grounded via a wire. The battery detection circuit in this application can not only sample the battery voltage, but also effectively judge the short circuit and reverse connection of the circuit, and its use effect is better.
[0008] 4. The output terminal of the three-terminal Zener diode in the MCU power supply circuit is electrically connected to one end of capacitor C13, the positive terminal of capacitor C7, and the +3.3V connection terminal via wires. The negative terminals of capacitors C6 and C7, the common terminal of the three-terminal Zener diode, and the other end of capacitor C13 are grounded via wires. This design is the fourth technical feature of this utility model. The purpose of this design is that the output terminal of the three-terminal Zener diode in the MCU power supply circuit is electrically connected to one end of capacitor C13, the positive terminal of capacitor C7, and the +3.3V connection terminal via wires, while the negative terminals of capacitors C6 and C7, the common terminal of the three-terminal Zener diode, and the other end of capacitor C13 are grounded via wires. This ensures that the MCU power supply circuit can stably supply power to the charging control circuit.
[0009] Technical Solution: A conveniently stored winding reel charging control circuit includes an input rectifier and filter circuit, a DC / DC voltage conversion circuit, a battery detection circuit, a charging current value switching circuit, an MCU control circuit, and an MCU power supply circuit. Pin 3 of the bridge rectifier in the input rectifier and filter circuit is electrically connected to the HV terminal of the DC / DC voltage conversion circuit via a wire. The V+ terminal of the DC / DC voltage conversion circuit is electrically connected to the positive terminal of diode D10 in the battery detection circuit via a wire. The V+ terminal of the DC / DC voltage conversion circuit is electrically connected to the input terminal of the three-terminal Zener diode and the positive terminal of capacitor C6 in the MCU power supply circuit via wires. The +3.3V terminal of the MCU power supply circuit is electrically connected to pin 9 of the control chip in the MCU control circuit via a wire. 8. Grounding is achieved through wires. Pin 3 of the control chip in the MCU control circuit is electrically connected to one end of resistor R45 in the charging current value switching circuit through a wire. Pin 5 of the control chip in the MCU control circuit is electrically connected to one end of resistor R40 in the charging current value switching circuit through a wire. Pin 14 of the control chip in the MCU control circuit is electrically connected to one end of resistor R53 in the charging current value switching circuit through a wire. The negative terminal of diode D10 in the DC / DC voltage conversion circuit is electrically connected to the output terminal of operational amplifier 1B and one end of capacitor C22 in the charging current value switching circuit through a wire. The negative terminal of diode D9 in the DC / DC voltage conversion circuit is electrically connected to the output terminal of operational amplifier 1D and one end of capacitor C20 in the charging current value switching circuit through a wire.
[0010] Compared with the prior art, the present invention provides a conveniently stored winding reel charging control circuit that not only ensures charging safety and efficiency while reducing the impact of charging current on battery life, but also features fast and accurate charging current switching and better performance. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of a conveniently stored winding reel charging control circuit.
[0012] Figure 2 This is a schematic diagram of the input rectifier filter circuit.
[0013] Figure 3 This is a schematic diagram of a DC / DC voltage conversion circuit.
[0014] Figure 4 This is a schematic diagram of the battery detection circuit and the MCU power supply circuit.
[0015] Figure 5This is a schematic diagram of the charging current value switching circuit.
[0016] Figure 6 This is a schematic diagram of the main structure of the MCU control circuit. Detailed Implementation
[0017] Example 1: Refer to Appendix Figures 1-6 A conveniently stored wire reel charging control circuit includes an input rectifier and filter circuit 1, a DC / DC voltage conversion circuit 2, a battery detection circuit 3, a charging current value switching circuit 4, an MCU control circuit 5, and an MCU power supply circuit 6. The pin 3 of the bridge rectifier in the input rectifier and filter circuit 1 is electrically connected to the HV terminal of the DC / DC voltage conversion circuit 2 via a wire. The V+ terminal of the DC / DC voltage conversion circuit 2 is electrically connected to the positive terminal of the diode D10 in the battery detection circuit 3 via a wire. The V+ terminal of the DC / DC voltage conversion circuit 2 is electrically connected to the input terminal of the three-terminal Zener diode and the positive terminal of the capacitor C6 in the MCU power supply circuit 6 via wires. The +3.3V terminal of the MCU power supply circuit 6 is electrically connected to the pin 9 of the control chip in the MCU control circuit 5 via a wire. 8. Grounding is achieved through wires. Pin 3 of the control chip in the MCU control circuit 5 is electrically connected to one end of resistor R45 in the charging current value switching circuit 4 through a wire. Pin 5 of the control chip in the MCU control circuit 5 is electrically connected to one end of resistor R40 in the charging current value switching circuit 4 through a wire. Pin 14 of the control chip in the MCU control circuit 5 is electrically connected to one end of resistor R53 in the charging current value switching circuit 4 through a wire. The negative terminal of diode D10 in the DC / DC voltage conversion circuit 2 is electrically connected to the output terminal of operational amplifier 1B and one end of capacitor C22 in the charging current value switching circuit 4 through a wire. The negative terminal of diode D9 in the DC / DC voltage conversion circuit 2 is electrically connected to the output terminal of operational amplifier 1D and one end of capacitor C20 in the charging current value switching circuit 4 through a wire.
[0018] The positive input terminal of operational amplifier 1B in the charging current switching circuit 4 is electrically connected to one end of each of two resistors R53, one end of a capacitor C27, and one end of another resistor R57 via wires. The other end of one resistor R53 is electrically connected to pin 14 of the control chip via a wire, and the other end of the other resistor R53 is electrically connected to the +3.3V connection terminal in the MCU power supply circuit 6 via a wire. The other ends of resistor R57 and capacitor C27 are grounded via wires. The negative input terminal of operational amplifier 1B is connected to one end of resistor R45, one end of resistor R52, and one end of capacitor C25 via wires. One end of resistor R45 is electrically connected to the other end of capacitor C22. The other end of resistor R45 is electrically connected to the V+ terminal of DC / DC voltage conversion circuit 2 via a wire. The other ends of resistor R52 and capacitor C25 are grounded via wires. The positive input terminal of operational amplifier 1D in charging current value switching circuit 4 is electrically connected to one end of resistor R47, one end of resistor R55, one end of resistor R48, one end of resistor R41, one end of resistor R43, and one end of capacitor C26 via wires. The other ends of resistor R47 and resistor R48 are connected to the +3 terminal of MCU power supply circuit via wires.The 3V connection terminal establishes an electrical connection. The other ends of resistor R55 and capacitor C26 are grounded via wires. The other end of resistor R41 is electrically connected to the collector of transistor Q6 via a wire. The base of transistor Q6 is electrically connected to one end of resistor R40 and one end of resistor R36 via wires. The other end of resistor R40 is electrically connected to pin 5 of the control chip in the MCU control circuit 5 via a wire. The emitter of transistor Q6 and the other end of resistor R36 are grounded via wires. The other end of resistor R43 is electrically connected to the collector of transistor Q7 via a wire. The base of transistor Q7 is electrically connected to one end of resistor R45 and one end of resistor R37 via wires. The other end of resistor R45 is electrically connected to pin 3 of the control chip in MCU control circuit 5 via a wire. The emitter of transistor Q7 and the other end of resistor R37 are grounded via wires. The negative input terminal of operational amplifier 1D is connected to the other end of capacitor C20, one end of capacitor C21, and one end of resistor R34 via wires. The positive input terminal of operational amplifier 1A is electrically connected to the other end of resistor R34. The other end of resistor R34 is electrically connected to one end of resistor R38 and one end of resistor R39 via wires. The other ends of capacitor C21, resistor R38, and resistor R39 are grounded via wires. The other end of resistor R34 is electrically connected to the Vbt- connection terminal in battery detection circuit 3 via a wire. The negative input terminal of operational amplifier 1A is electrically connected to one end of resistor R42, one end of resistor R30, and one end of capacitor C18 via wires. The other end of resistor R42 is grounded via a wire. The output terminal of operational amplifier 1A is electrically connected via wires to the other ends of resistor R30, capacitor C18, and resistor R28, respectively. The other end of resistor R28 is electrically connected via a wire to one end of capacitor C18, and the other end of capacitor C18 is grounded via a wire. The positive power supply terminal of operational amplifier 1A is electrically connected via a wire to the V+ terminal of DC / DC voltage conversion circuit 2, and the negative power supply terminal of operational amplifier 1A is grounded via a wire.
[0019] In the battery detection circuit 3, the negative terminal of diode D10 is electrically connected to the source terminal of field-effect transistor Q7 and one end of resistor R12 via wires. The gate terminal of field-effect transistor Q7 and the other end of resistor R12 are electrically connected to one end of resistor R16 via wires. The other end of resistor R16 is electrically connected to the collector terminal of transistor Q2 via wires. The base terminal of transistor Q2 is electrically connected to one end of resistor R21 and one end of resistor R23 via wires. The emitter terminal of transistor Q2 and the other end of resistor R23 are grounded via wires. The other end of resistor R21 is electrically connected to the corresponding pin of the control chip in the MCU control circuit via wires. The drain terminal of field-effect transistor Q7 is connected to the corresponding terminal of transformer T3, the negative terminal of diode D9, and the diode via wires. The positive terminal of diode D11 is electrically connected. The positive terminal of diode D9 is electrically connected to one end of resistor R19 via a wire, and the other end of resistor R19 is electrically connected to one end of resistor R26 via a wire. The other end of resistor R26 is electrically connected to the corresponding pin of the control chip in MCU control circuit 5 via a wire. The negative terminal of diode D11 is electrically connected to one end of resistor R6 via a wire. The other end of resistor R6 is electrically connected to one end of another resistor R6 and the negative terminal of diode D7 via a wire. The other end of another resistor R6 is electrically connected to one end of resistor R20, one end of capacitor C9, and the corresponding pin of the control chip in MCU control circuit 5 via a wire. The positive terminal of diode D7, the other end of resistor R20, and the other end of capacitor C9 are grounded via a wire.
[0020] The output terminal of the three-terminal Zener diode in the MCU power supply circuit 6 is electrically connected to one end of capacitor C13, the positive terminal of capacitor C7, and the +3.3V connection terminal through wires. The negative terminals of capacitor C6 and C7, the common terminal of the three-terminal Zener diode, and the other end of capacitor C13 are grounded through wires.
[0021] It should be understood that although the above embodiments provide a relatively detailed textual description of the design concept of this utility model, these textual descriptions are merely simple textual descriptions of the design concept of this utility model, and not limitations on the design concept of this utility model. Any combination, addition, or modification that does not exceed the design concept of this utility model shall fall within the protection scope of this utility model.
Claims
1. A conveniently stored winding reel charging control circuit, comprising an input rectifier and filter circuit (1), a DC / DC voltage conversion circuit (2), a battery detection circuit (3), a charging current value switching circuit (4), an MCU control circuit (5), and an MCU power supply circuit (6), wherein pin 3 of the bridge rectifier in the input rectifier and filter circuit (1) is electrically connected to the HV connection terminal in the DC / DC voltage conversion circuit (2) via a wire, the V+ connection terminal in the DC / DC voltage conversion circuit (2) is electrically connected to the positive terminal of diode D10 in the battery detection circuit (3) via a wire, the V+ connection terminal in the DC / DC voltage conversion circuit (2) is electrically connected to the input terminal of the three-terminal Zener diode and the positive terminal of capacitor C6 in the MCU power supply circuit (6) via a wire, and the +3.3V connection terminal in the MCU power supply circuit (6) is electrically connected to pin 9 of the control chip in the MCU control circuit (5) via a wire, and pin 8 of the control chip is grounded via a wire, characterized in that: The pin 3 of the control chip in the MCU control circuit (5) is electrically connected to one end of the resistor R45 in the charging current value switching circuit (4) through a wire. The pin 5 of the control chip in the MCU control circuit (5) is electrically connected to one end of the resistor R40 in the charging current value switching circuit (4) through a wire. The pin 14 of the control chip in the MCU control circuit (5) is electrically connected to one end of the resistor R53 in the charging current value switching circuit (4) through a wire. The negative terminal of the diode D10 in the DC / DC voltage conversion circuit (2) is electrically connected to the output terminal of the operational amplifier 1B and one end of the capacitor C22 in the charging current value switching circuit (4) through a wire. The negative terminal of the diode D9 in the DC / DC voltage conversion circuit (2) is electrically connected to the output terminal of the operational amplifier 1D and one end of the capacitor C20 in the charging current value switching circuit (4) through a wire.
2. The conveniently stored winding reel charging control circuit according to claim 1, characterized in that: The positive input terminal of the operational amplifier 1B in the charging current value switching circuit (4) is electrically connected to one end of each of two resistors R53, one end of a capacitor C27, and one end of another resistor R57 via wires. The other end of one resistor R53 is electrically connected to pin 14 of the control chip via a wire, and the other end of the other resistor R53 is electrically connected to the +3.3V connection terminal in the MCU power supply circuit (6) via a wire. The other ends of resistor R57 and capacitor C27 are grounded via wires. The negative input terminal of the operational amplifier 1B is connected to one end of resistor R45, one end of resistor R52, and one end of capacitor C25 via wires. One end of the resistor R45 is electrically connected to the other end of the capacitor C22. The other end of the resistor R45 is electrically connected to the V+ terminal of the DC / DC voltage conversion circuit (2) through a wire. The other ends of the resistor R52 and the other ends of the capacitor C25 are respectively grounded through wires. The positive input terminal of the operational amplifier 1D in the charging current value switching circuit (4) is electrically connected to one end of the resistor R47, one end of the resistor R55, one end of the resistor R48, one end of the resistor R41, one end of the resistor R43 and one end of the capacitor C26 through wires. The other ends of the resistor R47 and the other ends of the resistor R48 are respectively connected to the +3 terminal of the MCU power supply circuit through wires.The 3V connection terminal is electrically connected. The other end of the resistor R55 and the other end of the capacitor C26 are grounded through wires. The other end of the resistor R41 is electrically connected to the collector of the transistor Q6 through a wire. The base of the transistor Q6 is electrically connected to one end of the resistor R40 and one end of the resistor R36 through wires. The other end of the resistor R40 is electrically connected to pin 5 of the control chip in the MCU control circuit (5) through a wire. The emitter of the transistor Q6 and the other end of the resistor R36 are grounded through wires. The other end of resistor R43 is electrically connected to the collector of transistor Q7 via a wire. The base of transistor Q7 is electrically connected to one end of resistor R45 and one end of resistor R37 via wires. The other end of resistor R45 is electrically connected to pin 3 of the control chip in the MCU control circuit (5) via a wire. The emitter of transistor Q7 and the other end of resistor R37 are grounded via wires. The negative input terminal of operational amplifier 1D is connected to the other end of capacitor C20, one end of capacitor C21, and one end of resistor R34 via wires. The positive input terminal of operational amplifier 1A is electrically connected to the other end of resistor R34, which is electrically connected to one end of resistor R38 and one end of resistor R39 via wires. The other ends of capacitor C21, resistor R38, and resistor R39 are grounded via wires. The other end of resistor R34 is electrically connected to the Vbt- connection terminal in battery detection circuit (3) via wires. The negative input terminal of operational amplifier 1A is electrically connected to one end of resistor R42, one end of resistor R30, and one end of capacitor C18 via wires. The other end of resistor R42 is grounded via a wire. The output terminal of operational amplifier 1A is electrically connected via wires to the other end of resistor R30, the other end of capacitor C18, and one end of resistor R28. The other end of resistor R28 is electrically connected via a wire to one end of capacitor C18, and the other end of capacitor C18 is grounded via a wire. The positive power supply terminal of operational amplifier 1A is electrically connected via a wire to the V+ connection terminal in the DC / DC voltage conversion circuit (2). The negative power supply terminal of operational amplifier 1A is grounded via a wire.
3. The conveniently stored winding reel charging control circuit according to claim 1, characterized in that: In the battery detection circuit (3), the negative terminal of diode D10 is electrically connected to the source terminal of field-effect transistor Q7 and one end of resistor R12 via wires. The gate terminal of field-effect transistor Q7 and the other end of resistor R12 are electrically connected to one end of resistor R16 via wires. The other end of resistor R16 is electrically connected to the collector terminal of transistor Q2 via wires. The base terminal of transistor Q2 is electrically connected to one end of resistor R21 and one end of resistor R23 via wires. The emitter terminal of transistor Q2 and the other end of resistor R23 are grounded via wires. The other end of resistor R21 is electrically connected to the corresponding pin of the control chip in the MCU control circuit via wires. The drain terminal of field-effect transistor Q7 is electrically connected to the corresponding terminal of transformer T3, the negative terminal of diode D9, and the diode via wires. The positive terminal of D11 is electrically connected. The positive terminal of the diode D9 is electrically connected to one end of the resistor R19 through a wire, and the other end of the resistor R19 is electrically connected to one end of the resistor R26 through a wire. The other end of the resistor R26 is electrically connected to the corresponding pin of the control chip in the MCU control circuit (5) through a wire. The negative terminal of the diode D11 is electrically connected to one end of the resistor R6 through a wire. The other end of the resistor R6 is electrically connected to one end of another resistor R6 and the negative terminal of the diode D7 through a wire. The other end of the other resistor R6 is electrically connected to one end of the resistor R20, one end of the capacitor C9 and the corresponding pin of the control chip in the MCU control circuit (5) through a wire. The positive terminal of the diode D7, the other end of the resistor R20 and the other end of the capacitor C9 are grounded through a wire.
4. The conveniently stored winding reel charging control circuit according to claim 1, characterized in that: The output terminal of the three-terminal Zener diode in the MCU power supply circuit (6) is electrically connected to one end of capacitor C13, the positive terminal of capacitor C7 and the +3.3V connection terminal through wires. The negative terminal of capacitor C6, the negative terminal of capacitor C7, the common terminal of the three-terminal Zener diode and the other end of capacitor C13 are grounded through wires.