Solar charging protection circuit for lamp
By introducing an MCU control circuit and a charging protection circuit into the solar charging system, and utilizing a combination of MOSFETs and transistors, the complexity of existing solar charging protection circuits is solved, resulting in cost reduction and improved stability of charging protection.
Patent Information
- Application Number
- CN202520118428.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-18
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-01-18
AI Technical Summary
Existing solar charging protection circuits are complex, increasing usage costs and reducing operational stability.
The circuit adopts an MCU control circuit and a charging protection circuit, which includes a circuit structure composed of a first MOSFET, a second MOSFET, a third transistor, and resistors. This simplifies the charging protection circuit and achieves charging protection through the combination of MOSFETs and transistors.
It reduces processing costs, improves the effectiveness and stability of charging protection, and enhances applicability.
Smart Images
Figure CN223785766U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of solar energy technology, specifically relating to a solar charging protection circuit for lamps. Background Technology
[0002] Solar energy is a common renewable energy source that is widely used in powering electrical appliances. To ensure its effectiveness, solar panels are usually used in conjunction with rechargeable batteries. When there is sunlight, the rechargeable batteries can be charged by solar energy. Although this can meet the general usage needs, it lacks charging protection or the charging protection circuit is very complex, which greatly increases the cost of use and reduces the stability of use, thus limiting its applicability. Summary of the Invention
[0003] The purpose of this invention is to provide a solar charging protection circuit for lighting fixtures with a reasonable structural design that is conducive to improving stability.
[0004] The technical solution to achieve the purpose of this utility model is a solar charging protection circuit for lamps, including an MCU control circuit and a charging protection circuit connected to the MCU control circuit. The charging protection circuit is disposed between the solar panel and the rechargeable battery. The charging protection circuit includes a first MOSFET, a second MOSFET, a fourth resistor, a third transistor, an eighth resistor, a ninth resistor, and a fifth resistor.
[0005] The drain of the first MOSFET is connected to the solar panel, the source of the first MOSFET is connected to the source of the second MOSFET, and the drain of the second MOSFET is connected to the rechargeable battery.
[0006] The gates of the first MOS transistor and the second MOS transistor are both connected to the collector of the third transistor.
[0007] The base of the third transistor is connected to the MCU control circuit through the fifth resistor, and the emitter of the third transistor is connected to the MCU control circuit through the series circuit of the eighth and ninth resistors.
[0008] One end of the fourth resistor is connected to the collector of the third transistor, and the other end is connected to the junction of the first MOSFET and the second MOSFET.
[0009] A further preferred embodiment is that both the first MOS transistor and the second MOS transistor are P-MOS transistors.
[0010] A further preferred embodiment is that the third transistor is an NPN transistor.
[0011] A further preferred embodiment is that the main control chip of the MCU control circuit is ZD2725, and the fifth resistor is connected to the fifth pin of the main control chip, and the eighth resistor is connected to the sixth pin of the main control chip.
[0012] This utility model has positive effects: its structure is reasonable, it has fewer components, thus reducing processing costs, and its simple structure helps to ensure the effectiveness and stability of charging protection, making it highly applicable. Attached Figure Description
[0013] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:
[0014] Figure 1 This is a schematic diagram of the structure of this utility model.
[0015] Figure labels: MCU control circuit 1, charging protection circuit 2. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example
[0017] See Figure 1A solar charging protection circuit for lighting fixtures includes an MCU control circuit 1 and a charging protection circuit 2 connected to the MCU control circuit. In this embodiment, the charging protection circuit is disposed between the solar panel and the rechargeable battery. In this embodiment, the solar panel is connected using a plug-in terminal. In practical applications, the charging protection circuit includes a first MOSFET Q1, a second MOSFET Q2, a fourth resistor R4, a third transistor Q3, an eighth resistor R8, a ninth resistor R9, and a fifth resistor R5. During electrical connection, the drain of the first MOSFET is connected to the solar panel. On the power board, the source of the first MOSFET and the source of the second MOSFET are connected, and the drain of the second MOSFET is connected to the rechargeable battery BAT. Furthermore, the gates of both the first and second MOSFETs are connected to the collector of a third transistor. The base of the third transistor is connected to the MCU control circuit via a fifth resistor, and the emitter of the third transistor is connected to the MCU control circuit via a series circuit of an eighth and a ninth resistor. One end of the fourth resistor is connected to the collector of the third transistor, and the other end is connected to the junction of the first and second MOSFETs. In this embodiment, both the first and second MOSFETs are P-MOSFETs. The third transistor is an NPN transistor. The main control chip of the MCU control circuit is a ZD2725, and the fifth resistor is connected to the fifth pin of the main control chip, while the eighth resistor is connected to the sixth pin of the main control chip.
[0018] This utility model has positive effects: its structure is reasonable, it has fewer components, thus reducing processing costs, and its simple structure helps to ensure the effectiveness and stability of charging protection, making it highly applicable.
[0019] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural parts described in the instruction manual can also be processed without any doubt based on existing technical common sense. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.
[0020] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. However, these obvious variations or modifications derived from the essential spirit of this utility model still fall within the protection scope of this utility model.
Claims
1. A solar charging protection circuit for lighting fixtures, comprising an MCU control circuit connected to the MCU control circuit, wherein the charging protection circuit is disposed between the solar panel and the rechargeable battery, characterized in that: The charging protection circuit includes a first MOSFET, a second MOSFET, a fourth resistor, a third transistor, an eighth resistor, a ninth resistor, and a fifth resistor; The drain of the first MOSFET is connected to the solar panel, the source of the first MOSFET is connected to the source of the second MOSFET, and the drain of the second MOSFET is connected to the rechargeable battery. The gates of the first MOS transistor and the second MOS transistor are both connected to the collector of the third transistor. The base of the third transistor is connected to the MCU control circuit through the fifth resistor, and the emitter of the third transistor is connected to the MCU control circuit through the series circuit of the eighth and ninth resistors. One end of the fourth resistor is connected to the collector of the third transistor, and the other end is connected to the junction of the first MOSFET and the second MOSFET.
2. The solar charging protection circuit for lamps according to claim 1, characterized in that: Both the first MOS transistor and the second MOS transistor are P-MOS transistors.
3. The solar charging protection circuit for lamps according to claim 1, characterized in that: The third transistor is an NPN transistor.
4. The solar charging protection circuit for lamps according to claim 1, characterized in that: The main control chip of the MCU control circuit is ZD2725, and the fifth resistor is connected to the fifth pin of the main control chip, and the eighth resistor is connected to the sixth pin of the main control chip.