Charging control circuit

Abstract

The utility model relates to the technical field of solar cells, in particular to a charging control circuit, which comprises a charging master control circuit, a quick charging circuit and a rechargeable battery, the rechargeable battery is connected with a battery interface J2, the charging master control circuit comprises a solar cell panel interface J4 and a high-voltage battery charger chip IC3, and the high-voltage battery charger chip IC3 is connected with the quick charging circuit. A charging main control circuit and a quick charging circuit are designed, under the normal condition, a solar cell panel slowly charges a rechargeable battery through the charging main control circuit, under the night condition, the quick charging circuit can be used for quickly charging the rechargeable battery through the charging main control circuit, the charging main control circuit supports wide-voltage and large-current input, and the quick charging circuit can be used for charging the rechargeable battery through the charging main control circuit. And the practicability of the product is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of solar cell technology, specifically a charging control circuit. Background Technology

[0002] Due to the presence of its LED display module, the solar control module requires a base power consumption of 10mA+. At night, solar charging is impossible, and even with zero load, the module itself continuously consumes power from the rechargeable battery module at 10mA+. Therefore, the rechargeable battery module must be disconnected promptly when not in use; otherwise, it will deplete its own power within weeks during storage. Once the battery is depleted, it needs to be recharged as soon as possible. However, existing batteries do not support user-defined high-voltage, high-current fast charging schemes and can only be slowly charged by connecting to a solar panel, resulting in low charging efficiency. Summary of the Invention

[0003] To address the aforementioned technical problems, this utility model provides a charging control circuit that supports wide voltage and high current input, enabling rapid charging of rechargeable battery modules.

[0004] The technical solution is as follows: A charging control circuit, characterized in that it includes a main charging control circuit, a fast charging circuit, and a rechargeable battery. The rechargeable battery is connected to a battery interface J2. The main charging control circuit includes a solar panel interface J4 and a high-voltage battery charger chip IC3. Pins 3 and 4 of the solar panel interface J4 are connected to one end of capacitor C13, one end of resistor R12, one end of resistor R11, one end of capacitor C14, the drain of MOSFET Q3, and pin 2 of the high-voltage battery charger chip IC3. Pins 1 and 2 of the solar panel interface J4 are connected to the other end of capacitor C13 and ground. The source of MOSFET Q3 is connected to the anode of diode D6, one end of capacitor C22, and the source of MOSFET Q4. The other end of capacitor C22 is connected to one end of resistor R35. The gate of MOSFET Q3 is connected to the cathode of diode D6, the other end of resistor R35, the gate of MOSFET Q4, and pin 1 of high-voltage battery charger chip IC3. The other end of resistor R11 is connected to the other end of capacitor C14 and is connected to one end of resistor R13 and one end of resistor R18. The other end of resistor R13 is connected to one end of capacitor C28 and pin 3 of high-voltage battery charger chip IC3. The other end of resistor R18 is connected to one end of resistor R21 and pin 4 of high-voltage battery charger chip IC3. The other end of resistor R12 is connected to the drain of MOSFET Q9, one end of resistor R15, and pin 5 of high-voltage battery charger chip IC3. The gate of MOSFET Q9 is connected to one end of resistor R40 and the temperature detection circuit. The other end of resistor R40, the source of MOSFET Q9, the other end of resistor R15, and the other end of resistor R21 are all grounded. The drain of MOSFET Q4 is connected to one end of capacitor C8, one end of capacitor C9, one end of capacitor C10, one end of capacitor C11, one end of capacitor C12, the drain of MOSFET Q5, and pins 27 and 28 of the high-voltage battery charger chip IC3. The gate of MOSFET Q5 is connected to one end of resistor R31 and one end of resistor R32. The other end of resistor R32 is grounded. The other end of resistor R31 is connected to pin 22 of the high-voltage battery charger chip IC3. The source of MOSFET Q5 is connected to one end of inductor L2 and the MOSFET... The drain terminal of transistor Q7, one end of capacitor C16, and pin 23 of the high-voltage battery charger chip IC3 are connected. The other end of capacitor C16 is connected to the cathode of diode D7 and pin 21 of the high-voltage battery charger chip IC3. The other end of diode D7 is connected to one end of capacitor C15, one end of resistor R38, one end of resistor R42, and pin 25 of the high-voltage battery charger chip IC3. The other end of capacitor C15, pins 26 and 29 of the high-voltage battery charger chip IC3, the other ends of capacitors C8, C9, and C10 are all grounded. The gate terminal of MOSFET Q7 is connected to one end of resistor R33 and one end of resistor R34. The other end of resistor R33 is connected to pin 24 of the high-voltage battery charger chip IC3.The source terminal of the MOSFET Q7 is connected to the other end of resistor R34 and ground; the other end of resistor R38 is connected to one end of resistor R39 and pin 11 of the high-voltage battery charger chip IC3; the other end of resistor R42 is connected to one end of resistor R43 and pin 12 of the high-voltage battery charger chip IC3; the other ends of resistors R39 and R43 are both grounded; pin 9 of the high-voltage battery charger chip IC3 is connected to one end of resistor R25, and pin 10 is connected to one end of capacitor C20; the other ends of resistor R25 and capacitor C20 are both grounded; pin 15 of the high-voltage battery charger chip IC3 is connected to one end of resistor R24, and pin 16 is connected to one end of resistor R22; the other end of resistor R22 is connected to... One end of capacitor C21 is connected to the inductor L2. The other ends of resistor R24 ​​and capacitor C21 are both grounded. The other end of inductor L2 is connected to one end of resistor R14 and pin 20 of high-voltage battery charger chip IC3. The other end of resistor R14 is connected to one end of capacitor C17, one end of capacitor C18, one end of capacitor C19, one end of resistor R16, one end of capacitor C23, one end of resistor R17, pins 1 to 3 of MOSFET Q6 (model IRF6201), and pin 19 of high-voltage battery charger chip IC3. The other ends of capacitors C17, C18, and C19 are all grounded. The other end of resistor R16 and capacitor C23 are connected and connected to one end of resistor R19 and the high-voltage battery. Pin 18 of charger chip IC3 is connected to the other end of resistor R19, which is grounded. The other end of resistor R17 is connected to the collector of transistor Q8 and pin 4 of MOSFET Q6. The base of transistor Q8 is connected to one end of resistor R23 and one end of resistor R28. The other end of resistor R28 and the emitter of transistor Q8 are both grounded. The other end of resistor R23 is connected to the battery overvoltage / undervoltage monitoring circuit. Pin 2 of battery interface J2 is grounded. The fast charging circuit includes a 12V power interface J1 and a boost chip IC1. Pins 3 and 4 of the 12V power interface are connected to the anodes of diode D1 and D4, respectively. The cathodes of diodes D1 and D4 are connected and then connected to fuse F1. At one end, the other end of the fuse F1 is connected to one end of capacitor C1, one end of capacitor C2, one end of capacitor C3, one end of inductor L1, and pin 6 of the boost converter IC1. The other end of the inductor L1 is connected to pins 1 and 2 of Schottky diode D2, and pins 1 to 3 of MOSFET Q10 (model IRF6201). Pin 4 of MOSFET Q10 is connected to pin 7 of the boost converter IC1. Pins 5 to 8 of MOSFET Q10, the other end of capacitor C1, the other end of capacitor C2, and the other end of capacitor C3 are all grounded. Pin 3 of Schottky diode D2 is connected to one end of capacitor C4, one end of capacitor C5, one end of capacitor C6, one end of resistor R2, the anode of diode D3, and the anode of diode D5, and outputs an 18V power supply.The other end of resistor R2 is connected to one end of resistor R5 and pin 2 of boost chip IC1. Pins 8 and 3 of boost chip IC1 are connected to one end of capacitor C27. The other ends of capacitors C27, C5, C4, and C6, the other end of resistor R5, and one end of resistor R41 are all grounded. The other end of resistor R41 is connected to pin 1 of boost chip IC1 and ground. The cathodes of diodes D3 and D3 are connected to pins 3 and 4 of solar panel interface J4.

[0005] A further feature is that the temperature detection circuit includes a temperature sensor interface J5. Pin 1 of the temperature sensor interface J5 is connected to one end of resistor R20, one end of resistor R27, and the inverting input of comparator IC4A. The non-inverting input of comparator IC4A is connected to one end of resistor R26 and one end of resistor R36. The other end of resistor R20 is connected to one end of capacitor C25, the other end of resistor R36, the power supply terminal of comparator IC4A, and a 5V power supply. The other end of capacitor C25 is grounded. Pin 2 of the temperature sensor interface J5, the other end of resistor R27, the other end of resistor R26, and the ground terminal of comparator IC4A are all grounded. The output terminal of comparator IC4A is connected to the gate terminal of MOSFET Q9.

[0006] The battery overvoltage and undervoltage monitoring circuit includes a comparator IC2. Pin 1 of the battery interface J2 is also connected to one end of resistor R6, one end of capacitor C7, one end of resistor R3, one end of resistor R4, one end of resistor R1, and pins 1 to 3 of MOSFET Q1 (model IRF6201). The other end of capacitor C7 is grounded. The other end of resistor R6 is connected to one end of resistor R8 and pin 4 of comparator IC2. The other end of resistor R8 is connected to one end of resistor R10 and pin 3 of comparator IC2. The other end of resistor R10 is grounded. Pin 5 of comparator IC2 is grounded, and pin 2 is... Pin 1 of the battery interface J2 is connected; pin 6 of the comparator IC2 is connected to one end of resistor R7 and the other end of resistor R3; the other end of resistor R7 is connected to one end of resistor R9 and the base of transistor Q2; the emitter of transistor Q2 and the other end of resistor R9 are both grounded; the collector of transistor Q2 is connected to the other end of resistor R1 and pin 4 of MOSFET Q1; pin 1 of the comparator IC2 is connected to the other end of resistor R4 and the other end of resistor R23; pins 5 to 8 of MOSFET Q1 are connected and connected to the power supply interface J3 via switch S1.

[0007] Pins 3 and 4 of the solar panel interface J4 are also connected to the anode of diode D8. The cathode of diode D8 is connected to one end of capacitor C24 and pin 3 of voltage regulator IC5. Pin 2 of voltage regulator IC5 is connected to one end of capacitor C26 and outputs 5V power. The other end of capacitor C24, the other end of capacitor C26, and pin 1 of voltage regulator IC5 are all grounded.

[0008] Pins 7 and 8 of the high-voltage battery charger chip IC3 are connected to the working status indicator lights R and G, respectively, and the output of the comparator IC4A is connected to the indicator light Y.

[0009] By adopting this utility model, a charging main control circuit and a fast charging circuit are designed. Under normal circumstances, the solar panel slowly charges the rechargeable battery through the charging main control circuit. In the dark, the fast charging circuit can be used to quickly charge the rechargeable battery through the charging main control circuit. The charging main control circuit supports wide voltage and high current input, which greatly improves the practicality of the product. Attached Figure Description

[0010] Figure 1 This is the schematic diagram of the main control circuit for charging.

[0011] Figure 2 Schematic diagram of fast charging circuit;

[0012] Figure 3 This is a schematic diagram of a battery overvoltage and undervoltage monitoring circuit.

[0013] Figure 4 This is a schematic diagram of a temperature detection circuit.

[0014] Figure 5 This circuit includes a voltage regulator and indicator lights. Detailed Implementation

[0015] See Figures 1 to 5As shown, a charging control circuit includes a main charging control circuit, a fast charging circuit, and a rechargeable battery. The rechargeable battery is connected to a battery interface J2. The main charging control circuit includes a solar panel interface J4 and a high-voltage battery charger chip IC3. Pins 3 and 4 of the solar panel interface J4 are connected to one end of capacitor C13, one end of resistor R12, one end of resistor R11, one end of capacitor C14, the drain of MOSFET Q3, and pin 2 of the high-voltage battery charger chip IC3. Pins 1 and 2 of the solar panel interface J4 are connected to the other end of capacitor C13 and ground. The source of MOSFET Q3 is connected to the anode of diode D6, one end of capacitor C22, and the source of MOSFET Q4. The other end of capacitor C22 is connected to... Connect one end of resistor R35. The gate of MOSFET Q3 is connected to the cathode of diode D6, the other end of resistor R35, the gate of MOSFET Q4, and pin 1 of high-voltage battery charger chip IC3. The other end of resistor R11 is connected to the other end of capacitor C14 and then to one end of resistor R13 and one end of resistor R18. The other end of resistor R13 is connected to one end of capacitor C28 and pin 3 of high-voltage battery charger chip IC3. The other end of resistor R18 is connected to one end of resistor R21 and pin 4 of high-voltage battery charger chip IC3. The other end of resistor R12 is connected to the drain of MOSFET Q9, one end of resistor R15, and pin 5 of high-voltage battery charger chip IC3. The gate of MOSFET Q9 is connected to one end of resistor R40 and the temperature... In the temperature detection circuit, the other end of resistor R40, the source of MOSFET Q9, the other end of resistor R15, and the other end of resistor R21 are all grounded. The drain of MOSFET Q4 is connected to one end of capacitor C8, one end of capacitor C9, one end of capacitor C10, one end of capacitor C11, one end of capacitor C12, the drain of MOSFET Q5, and pins 27 and 28 of the high-voltage battery charger chip IC3. The gate of MOSFET Q5 is connected to one end of resistor R31 and one end of resistor R32. The other end of resistor R32 is grounded. The other end of resistor R31 is connected to pin 22 of the high-voltage battery charger chip IC3. The source of MOSFET Q5 is connected to one end of inductor L2, the drain of MOSFET Q7, one end of capacitor C16, and the high-voltage battery charger... Pin 23 of the electrical chip IC3, the other end of capacitor C16 is connected to the cathode of diode D7 and pin 21 of the high-voltage battery charger chip IC3. The other end of diode D7 is connected to one end of capacitor C15, one end of resistor R38, one end of resistor R42, and pin 25 of the high-voltage battery charger chip IC3. The other end of capacitor C15, pins 26 and 29 of the high-voltage battery charger chip IC3, the other end of capacitor C8, the other end of capacitor C9, and the other end of capacitor C10 are all grounded. The gate of MOSFET Q7 is connected to one end of resistor R33 and one end of resistor R34. The other end of resistor R33 is connected to pin 24 of the high-voltage battery charger chip IC3. The source of MOSFET Q7 is connected to the other end of resistor R34 and ground.The other end of resistor R38 is connected to one end of resistor R39 and pin 11 of high-voltage battery charger chip IC3. The other end of resistor R42 is connected to one end of resistor R43 and pin 12 of high-voltage battery charger chip IC3. The other ends of resistors R39 and R43 are both grounded. Pin 9 of high-voltage battery charger chip IC3 is connected to one end of resistor R25, and pin 10 is connected to one end of capacitor C20. The other ends of resistor R25 and capacitor C20 are both grounded. Pin 15 of high-voltage battery charger chip IC3 is connected to one end of resistor R24, and pin 16 is connected to one end of resistor R22. The other end of resistor R22 is connected to one end of capacitor C21. The other ends of resistor R24 ​​and capacitor C21 are both grounded. The other end of inductor L2 is connected to one end of resistor R14 and pin 20 of high-voltage battery charger chip IC3. The other end of resistor R14 is connected to one end of capacitor C17. One end of capacitor C18, one end of capacitor C19, one end of resistor R16, one end of capacitor C23, one end of resistor R17, pins 1 to 3 of MOSFET Q6 (model IRF6201), pin 19 of high-voltage battery charger chip IC3, the other ends of capacitors C17, C18, and C19 are all grounded, the other end of resistor R16 and the other end of capacitor C23 are connected and connected to one end of resistor R19 and pin 18 of high-voltage battery charger chip IC3, the other end of resistor R19 is grounded, the other end of resistor R17 is connected to the collector of transistor Q8 and pin 4 of MOSFET Q6, the base of transistor Q8 is connected to one end of resistor R23 and one end of resistor R28, the other end of resistor R28 and the emitter of transistor Q8 are both grounded, the other end of resistor R23 is connected to the battery overvoltage and undervoltage monitoring circuit, and pin 2 of battery interface J2 is grounded;The fast charging circuit includes a 12V power interface J1 and a boost converter IC1. Pins 3 and 4 of the 12V power interface are connected to the anodes of diodes D1 and D4, respectively. The cathodes of diodes D1 and D4 are connected together and connected to one end of fuse F1. The other end of fuse F1 is connected to one end of capacitor C1, one end of capacitor C2, one end of capacitor C3, one end of inductor L1, and pin 6 of boost converter IC1. The other end of inductor L1 is connected to pins 1 and 2 of Schottky diode D2 and pins 1 to 3 of MOSFET Q10 (model IRF6201). Pin 4 of MOSFET Q10 is connected to pin 7 of boost converter IC1. Pins 5 to 8 of MOSFET Q10, the other end of capacitor C1, and the other end of capacitor C2 are also connected. The other end of capacitor C3 is grounded. Pin 3 of Schottky diode D2 is connected to one end of capacitor C4, one end of capacitor C5, one end of capacitor C6, one end of resistor R2, the anode of diode D3, and the anode of diode D5, outputting 18V power. The other end of resistor R2 is connected to one end of resistor R5 and pin 2 of boost chip IC1. Pins 8 and 3 of boost chip IC1 are connected to one end of capacitor C27. The other ends of capacitors C27, C5, C4, C6, R5, and R41 are all grounded. The other end of resistor R41 is connected to pin 1 of boost chip IC1 and ground. The cathodes of diodes D3 and D4 are connected to pins 3 and 4 of solar panel interface J4.

[0016] The temperature detection circuit includes a temperature sensor interface J5. Pin 1 of the temperature sensor interface J5 is connected to one end of resistor R20, one end of resistor R27, and the inverting input of comparator IC4A. The non-inverting input of comparator IC4A is connected to one end of resistor R26 and one end of resistor R36. The other end of resistor R20 is connected to one end of capacitor C25, the other end of resistor R36, the power supply terminal of comparator IC4A, and a 5V power supply. The other end of capacitor C25 is grounded. Pin 2 of the temperature sensor interface J5, the other end of resistor R27, the other end of resistor R26, and the ground terminal of comparator IC4A are all grounded. The output of comparator IC4A is connected to the gate terminal of MOSFET Q9. When an excessively high temperature is detected, an alarm signal can be provided to stop the high-voltage battery charger chip IC3 from working.

[0017] The battery overvoltage and undervoltage monitoring circuit includes comparator IC2. Pin 1 of the battery interface J2 is also connected to one end of resistor R6, one end of capacitor C7, one end of resistor R3, one end of resistor R4, one end of resistor R1, and pins 1 to 3 of MOSFET Q1 (model IRF6201). The other end of capacitor C7 is grounded. The other end of resistor R6 is connected to one end of resistor R8 and pin 4 of comparator IC2. The other end of resistor R8 is connected to one end of resistor R10 and pin 3 of comparator IC2. The other end of resistor R10 is grounded. Pin 5 of comparator IC2 is connected to... Pin 2 is connected to pin 1 of battery interface J2. Pin 6 of comparator IC2 is connected to one end of resistor R7 and the other end of resistor R3. The other end of resistor R7 is connected to one end of resistor R9 and the base of transistor Q2. The emitter of transistor Q2 and the other end of resistor R9 are both grounded. The collector of transistor Q2 is connected to the other end of resistor R1 and pin 4 of MOSFET Q1. Pin 1 of comparator IC2 is connected to the other end of resistor R4 and the other end of resistor R23. Pins 5 to 8 of MOSFET Q1 are connected and connected to power interface J3 through switch S1.

[0018] Pins 3 and 4 of the solar panel interface J4 are also connected to the anode of diode D8. The cathode of diode D8 is connected to one end of capacitor C24 and pin 3 of voltage regulator IC5. Pin 2 of voltage regulator IC5 is connected to one end of capacitor C26 and outputs 5V power. The other ends of capacitor C24, the other end of capacitor C26, and pin 1 of voltage regulator IC5 are all grounded. Pins 7 and 8 of the high-voltage battery charger chip IC3 are connected to the working status indicator R and G respectively. The output of comparator IC4A is connected to indicator Y.

[0019] The designed charging main control circuit supports both slow charging via solar input and fast charging via external fast power supply. When the battery is low, it can be fast-charged using fast charging; during the day, it can be charged slowly using solar power.

Claims

1. A charging control circuit, characterized in that, It includes a charging main control circuit, a fast charging circuit, and a rechargeable battery. The rechargeable battery is connected to the battery interface J2. The charging main control circuit includes a solar panel interface J4 and a high-voltage battery charger chip IC3. Pins 3 and 4 of the solar panel interface J4 are connected to one end of capacitor C13, one end of resistor R12, one end of resistor R11, one end of capacitor C14, the drain of MOSFET Q3, and pin 2 of the high-voltage battery charger chip IC3. Pins 1 and 2 of the solar panel interface J4 are connected to the other end of capacitor C13 and ground. The source of MOSFET Q3 is connected to the anode of diode D6, one end of capacitor C22, and the source of MOSFET Q4. The other end of capacitor C22 is connected to one end of resistor R35. The gate of MOSFET Q3 is connected to the cathode of diode D6, the other end of resistor R35, the gate of MOSFET Q4, and pin 1 of high-voltage battery charger chip IC3. The other end of resistor R11 is connected to the other end of capacitor C14 and then to one end of resistor R13 and one end of resistor R18. The other end of resistor R13 is connected to one end of capacitor C28 and pin 3 of high-voltage battery charger chip IC3. The other end of resistor R18 is connected to one end of resistor R21 and pin 4 of high-voltage battery charger chip IC3. The other end of resistor R12 is connected to the drain of MOSFET Q9, one end of resistor R15, and pin 5 of high-voltage battery charger chip IC3. The gate of MOSFET Q9 is connected to one end of resistor R40 and the temperature detection circuit. The other end of resistor R40, the source of MOSFET Q9, the other end of resistor R15, and the other end of resistor R21 are all grounded. The drain of MOSFET Q4 is connected to one end of capacitor C8, one end of capacitor C9, one end of capacitor C10, one end of capacitor C11, one end of capacitor C12, the drain of MOSFET Q5, and pins 27 and 28 of the high-voltage battery charger chip IC3. The gate of MOSFET Q5 is connected to one end of resistor R31 and one end of resistor R32. The other end of resistor R32 is grounded. The other end of resistor R31 is connected to pin 22 of the high-voltage battery charger chip IC3. The source of MOSFET Q5 is connected to one end of inductor L2, the drain of MOSFET Q7, one end of capacitor C16, and the high-voltage battery charger chip... Pin 23 of IC3; the other end of capacitor C16 is connected to the cathode of diode D7 and pin 21 of the high-voltage battery charger chip IC3; the other end of diode D7 is connected to one end of capacitor C15, one end of resistor R38, one end of resistor R42, and pin 25 of the high-voltage battery charger chip IC3; the other end of capacitor C15, pins 26 and 29 of the high-voltage battery charger chip IC3, the other end of capacitor C8, the other end of capacitor C9, and the other end of capacitor C10 are all grounded; the gate of MOSFET Q7 is connected to one end of resistor R33 and one end of resistor R34; the other end of resistor R33 is connected to pin 24 of the high-voltage battery charger chip IC3; the source of MOSFET Q7 is connected to the other end of resistor R34 and ground.The other end of resistor R38 is connected to one end of resistor R39 and pin 11 of the high-voltage battery charger chip IC3. The other end of resistor R42 is connected to one end of resistor R43 and pin 12 of the high-voltage battery charger chip IC3. The other ends of resistors R39 and R43 are both grounded. Pin 9 of the high-voltage battery charger chip IC3 is connected to one end of resistor R25, and pin 10 is connected to one end of capacitor C20. The other ends of resistor R25 and capacitor C20 are both grounded. Pin 15 of the high-voltage battery charger chip IC3 is connected to one end of resistor R24, and pin 16 is connected to one end of resistor R22. The other end of resistor R22 is connected to one end of capacitor C21. The other ends of resistor R24 ​​and capacitor C21 are both grounded. The other end of inductor L2 is connected to one end of resistor R14 and pin 20 of the high-voltage battery charger chip IC3. The other end of resistor R14 is connected to capacitor C17. One end of capacitor C18, one end of capacitor C19, one end of resistor R16, one end of capacitor C23, one end of resistor R17, pins 1 to 3 of MOSFET Q6 (model IRF6201), pin 19 of the high-voltage battery charger chip IC3, the other ends of capacitors C17, C18, and C19 are all grounded, the other end of resistor R16 and capacitor C23 are connected and connected to one end of resistor R19 and pin 18 of the high-voltage battery charger chip IC3, the other end of resistor R19 is grounded, the other end of resistor R17 is connected to the collector of transistor Q8 and pin 4 of MOSFET Q6, the base of transistor Q8 is connected to one end of resistor R23 and one end of resistor R28, the other end of resistor R28 and the emitter of transistor Q8 are both grounded, the other end of resistor R23 is connected to the battery overvoltage and undervoltage monitoring circuit, and pin 2 of battery interface J2 is grounded;The fast charging circuit includes a 12V power interface J1 and a boost chip IC1. Pins 3 and 4 of the 12V power interface are connected to the anodes of diode D1 and D4, respectively. The cathodes of diodes D1 and D4 are connected to one end of fuse F1. The other end of fuse F1 is connected to one end of capacitor C1, one end of capacitor C2, one end of capacitor C3, one end of inductor L1, and pin 6 of boost chip IC1. The other end of inductor L1 is connected to pins 1 and 2 of Schottky diode D2 and pins 1 to 3 of MOSFET Q10 (model IRF6201). Pin 4 of MOSFET Q10 is connected to pin 7 of boost chip IC1. Pins 5 to 8 of MOSFET Q10, the other end of capacitor C1, and the other end of capacitor C2 are also connected. The other ends of capacitor C3 are grounded. Pin 3 of Schottky diode D2 is connected to one end of capacitor C4, one end of capacitor C5, one end of capacitor C6, one end of resistor R2, the anode of diode D3, and the anode of diode D5, outputting 18V power. The other end of resistor R2 is connected to one end of resistor R5 and pin 2 of boost chip IC1. Pins 8 and 3 of boost chip IC1 are connected to one end of capacitor C27. The other ends of capacitors C27, C5, C4, C6, R5, and R41 are all grounded. The other end of resistor R41 is connected to pin 1 of boost chip IC1 and ground. The cathodes of diodes D3 and D3 are connected to pins 3 and 4 of solar panel interface J4.

2. The charging control circuit according to claim 1, characterized in that, The temperature detection circuit includes a temperature sensor interface J5. Pin 1 of the temperature sensor interface J5 is connected to one end of resistor R20, one end of resistor R27, and the inverting input of comparator IC4A. The non-inverting input of comparator IC4A is connected to one end of resistor R26 and one end of resistor R36. The other end of resistor R20 is connected to one end of capacitor C25, the other end of resistor R36, the power supply terminal of comparator IC4A, and a 5V power supply. The other end of capacitor C25 is grounded. Pin 2 of the temperature sensor interface J5, the other end of resistor R27, the other end of resistor R26, and the ground terminal of comparator IC4A are all grounded. The output of comparator IC4A is connected to the gate terminal of MOSFET Q9.

3. The charging control circuit according to claim 2, characterized in that, The battery overvoltage and undervoltage monitoring circuit includes a comparator IC2. Pin 1 of the battery interface J2 is also connected to one end of resistor R6, one end of capacitor C7, one end of resistor R3, one end of resistor R4, one end of resistor R1, and pins 1 to 3 of MOSFET Q1 (model IRF6201). The other end of capacitor C7 is grounded. The other end of resistor R6 is connected to one end of resistor R8 and pin 4 of comparator IC2. The other end of resistor R8 is connected to one end of resistor R10 and pin 3 of comparator IC2. The other end of resistor R10 is grounded. Pin 5 of comparator IC2 is grounded, and pin 2 is... Pin 1 of the battery interface J2 is connected. Pin 6 of the comparator IC2 is connected to one end of resistor R7 and the other end of resistor R3. The other end of resistor R7 is connected to one end of resistor R9 and the base of transistor Q2. The emitter of transistor Q2 and the other end of resistor R9 are both grounded. The collector of transistor Q2 is connected to the other end of resistor R1 and pin 4 of MOSFET Q1. Pin 1 of the comparator IC2 is connected to the other end of resistor R4 and the other end of resistor R23. Pins 5 to 8 of MOSFET Q1 are connected and connected to power supply interface J3 through switch S1.

4. The charging control circuit according to claim 3, characterized in that, Pins 3 and 4 of the solar panel interface J4 are also connected to the anode of diode D8. The cathode of diode D8 is connected to one end of capacitor C24 and pin 3 of voltage regulator IC5. Pin 2 of voltage regulator IC5 is connected to one end of capacitor C26 and outputs 5V power. The other end of capacitor C24, the other end of capacitor C26, and pin 1 of voltage regulator IC5 are all grounded.

5. A charging control circuit according to claim 4, characterized in that, Pins 7 and 8 of the high-voltage battery charger chip IC3 are connected to the working status indicator lights R and G, respectively, and the output of the comparator IC4A is connected to the indicator light Y.

Images