Protection circuit for power adapter

Abstract

The utility model relates to the technical field of power adapter circuits, in particular to a protection circuit for a power adapter, which comprises a main control unit, and a temperature detection unit, an output voltage and current control unit, a power supply unit, an output voltage detection unit, a battery voltage detection unit and a battery reverse connection detection unit which are connected with the main control unit, the power supply unit is connected with a charger output unit and an output loop control unit, the output loop control unit is connected with the main control unit, an output voltage detection unit, a battery voltage detection unit and a battery reverse connection detection unit, the battery voltage detection unit is connected with an output current detection unit, and the output current detection unit is connected with the main control unit. The output current detection unit is connected with the battery unit. According to the utility model, through integration of a plurality of function modules, comprehensive monitoring and intelligent control of the charging process are realized. The safety and reliability are improved, the charging efficiency is optimized, and the service life of the battery is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of power adapter circuit technology, and in particular to a protection circuit for power adapters. Background Technology

[0002] As a crucial component of electronic devices, the circuit design of the power adapter is of paramount importance. This circuit mainly consists of several parts, including an input filter circuit, a rectifier circuit, a switching circuit, an output filter circuit, and a feedback control circuit. The input filter circuit filters out high-frequency noise and interference from the power grid, ensuring the input stability of the power adapter. The rectifier circuit converts AC power to DC power, providing a stable DC power supply for subsequent circuits. The circuit design of a power adapter must comprehensively consider multiple aspects such as efficiency, stability, and safety to meet the needs of different devices and scenarios.

[0003] In existing power adapter circuits, certain protection mechanisms are required to ensure electrical safety during use. However, existing protection circuits have shortcomings, especially in their inability to fully monitor the charging process. Therefore, a new design for the protection circuits of power adapters is needed. Utility Model Content

[0004] To address the aforementioned issues, this invention integrates multiple functional modules to achieve comprehensive monitoring and intelligent control of the charging process. Its technical advantages are not only reflected in improved safety and reliability, but also in significantly optimizing the protection circuit for the power adapter, thus extending charging efficiency and battery lifespan.

[0005] The technical solution adopted in this utility model is: a protection circuit for a power adapter, including a main control unit, a temperature detection unit connected to the main control unit, an output voltage and current control unit, a power supply unit, an output voltage detection unit, a battery voltage detection unit, and a battery reverse connection detection unit. The power supply unit is connected to a charger output unit and an output circuit control unit. The output circuit control unit is connected to the main control unit, the output voltage detection unit, the battery voltage detection unit, and the battery reverse connection detection unit. The battery voltage detection unit is connected to an output current detection unit, which is connected to the main control unit and the battery unit. The temperature detection unit is used for temperature detection. The output voltage and current control unit is used to adjust the output voltage and current. The output circuit control unit is used to turn on and off the charging of the battery circuit. The output voltage detection unit is used to detect voltage and turn off the output. The output current detection unit is used to adjust the output power of the power adapter.

[0006] A further improvement to the above scheme is that the main control unit is an MCU control chip.

[0007] A further improvement to the above scheme is that the main control unit is connected to a timing unit, which is used for timing and shutting off the output when the charging power exceeds the battery capacity.

[0008] A further improvement to the above scheme is that the output voltage and current control unit is provided with a voltage regulation output module and a current regulation output module, and the output voltage and current control unit is connected to the main control unit through the voltage regulation output module and the current regulation output module.

[0009] A further improvement to the above solution is that the main control unit is equipped with a battery polarity detection module, and the main control unit is connected to the battery reverse connection detection unit through the battery polarity detection module.

[0010] A further improvement to the above scheme is that the main control unit is equipped with a charging circuit switch, and the main control unit is connected to the output circuit control unit through the charging circuit switch.

[0011] A further improvement to the above scheme is that the main control unit is equipped with an output current detection module, and the main control unit is connected to the output current detection unit through the output current detection module.

[0012] A further improvement to the above solution is that the battery unit is equipped with a battery voltage connection module, and the battery unit is connected to the output current detection unit through the battery voltage connection module.

[0013] The beneficial effects of this utility model are:

[0014] Compared to existing power adapter circuits, this invention integrates a temperature detection unit, which monitors the power adapter's operating temperature in real time, effectively preventing safety hazards caused by overheating and ensuring the safe and stable operation of the equipment. This function is significant for improving product reliability and extending service life. Secondly, the introduction of the output voltage and current control unit allows the circuit to flexibly adjust the output voltage and current according to actual needs, thereby achieving precise control of the charging process. This not only helps optimize charging efficiency but also effectively protects the battery from damage such as overcharging and over-discharging, extending battery life. Furthermore, the design of the output circuit control unit enables the circuit to intelligently start and stop the battery circuit charging, further enhancing the circuit's safety and flexibility. When reverse connection or abnormal state of the battery is detected, this unit can quickly cut off the charging circuit to avoid potential safety risks. In addition, the combined use of the output voltage detection unit and the output current detection unit not only achieves accurate voltage detection and abnormal shutdown functions but also adapts to different load requirements by adjusting the power adapter's output power. This function helps improve the circuit's adaptability and energy efficiency. This invention, by integrating multiple functional modules, achieves comprehensive monitoring and intelligent control of the charging process. Its technological benefits are not only reflected in improved safety and reliability, but also in significantly optimized charging efficiency and battery life, providing strong support for technological progress and industrial upgrading in the power adapter industry. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the protection circuit for the power adapter of this utility model;

[0016] Figure 2 for Figure 1 A schematic diagram of the connection of the protection circuit for the power adapter.

[0017] Explanation of reference numerals in the attached diagram: Main control unit 1, timing unit 10, battery polarity detection module 11, charging circuit switch 12, output current detection module 13, temperature detection unit 2, output voltage and current control unit 3, voltage regulation output module 31, current regulation output module 32, power supply unit 4, output voltage detection unit 5, battery voltage detection unit 6, output current detection unit 61, battery unit 62, battery voltage connection module 621, battery reverse connection detection unit 7, charger output unit 8, output circuit control unit 9. Detailed Implementation

[0018] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0019] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Figures 1-2As shown, in one embodiment of this utility model, a protection circuit for a power adapter is disclosed, including a main control unit 1, a temperature detection unit 2 connected to the main control unit 1, an output voltage and current control unit 3, a power supply unit 4, an output voltage detection unit 5, a battery voltage detection unit 6, and a battery reverse connection detection unit 7. The power supply unit 4 is connected to a charger output unit 8 and an output circuit control unit 9. The output circuit control unit 9 is connected to the main control unit 1, the output voltage detection unit 5, the battery voltage detection unit 6, and the battery reverse connection detection unit 7. The battery voltage detection unit 6 is connected to an output current detection unit 61, which is connected to the main control unit 1 and the battery unit 62. The temperature detection unit 2 is used for temperature detection, the output voltage and current control unit 3 is used for adjusting the output voltage and current, the output circuit control unit 9 is used for starting and stopping the charging of the battery circuit, the output voltage detection unit 5 is used for detecting voltage and stopping the output, and the output current detection unit 61 is used for adjusting the output power of the power adapter. This embodiment integrates a temperature detection unit 2, which monitors the power adapter's operating temperature in real time, effectively preventing safety hazards caused by overheating and ensuring the safe and stable operation of the equipment. This function is of great significance for improving product reliability and extending service life. Secondly, the introduction of the output voltage and current control unit 3 allows the circuit to flexibly adjust the output voltage and current according to actual needs, thereby achieving precise control of the charging process. This not only helps optimize charging efficiency but also effectively protects the battery from damage such as overcharging and over-discharging, extending battery life. Furthermore, the design of the output circuit control unit 9 enables the circuit to intelligently start and stop the charging of the battery circuit, further enhancing the circuit's safety and flexibility. When reverse connection or abnormal state of the battery is detected, this unit can quickly cut off the charging circuit to avoid potential safety risks. In addition, the combined use of the output voltage detection unit 5 and the output current detection unit 61 not only achieves accurate voltage detection and abnormal shutdown functions but also adapts to different load requirements by adjusting the power adapter's output power. This function helps improve the circuit's adaptability and energy efficiency. This embodiment integrates multiple functional modules to achieve comprehensive monitoring and intelligent control of the charging process. Its technological benefits are not only reflected in improved safety and reliability, but also in significantly optimized charging efficiency and battery life, providing strong support for technological progress and industrial upgrading in the power adapter industry.

[0021] The main control unit 1 is an MCU control chip. The main control unit 1 is connected to a timing unit 10, which is used for timing and shutting off the output when the charging level exceeds the battery capacity. In this embodiment, the MCU control chip, as the core, leverages its powerful data processing capabilities and flexible control logic to accurately manage the operating state of the entire circuit. The connected timing unit 10 not only accurately times the charging process but also promptly shuts off the output when the charging level exceeds the battery capacity, effectively preventing overcharging and extending battery life. This function is particularly important in power adapter protection, ensuring the safety and stability of the charging process. Furthermore, the collaborative work of the MCU control chip and the timing unit 10 enables the power adapter to respond quickly in abnormal situations, taking protective measures such as power cut-off or reducing the output voltage, further improving the reliability and safety of the entire circuit.

[0022] The output voltage and current control unit 3 is equipped with a voltage regulation output module 31 and a current regulation output module 32, which are connected to the main control unit 1. In this embodiment, the voltage regulation output module 31 can adjust the output voltage in real time according to the instructions of the main control unit 1 to ensure that the load device receives a stable and suitable voltage supply. At the same time, the current regulation output module 32 is responsible for monitoring and regulating the output current, effectively preventing overcurrent and protecting the circuit from overload damage. The synergistic effect of the two regulation modules enables the power adapter to maintain a stable and reliable output under complex and changing operating conditions, thereby improving the stability and reliability of the entire power system. In addition, this technical solution also enhances the self-protection capability of the power adapter, extends its service life, and reduces the maintenance and replacement costs caused by failures.

[0023] The main control unit 1 is equipped with a battery polarity detection module 11, which is connected to the battery reverse connection detection unit 7. The main control unit 1 is also equipped with a charging circuit switch 12, which is connected to the output circuit control unit 9. Furthermore, the main control unit 1 is equipped with an output current detection module 13, which is connected to the output current detection unit 61. In this embodiment, the battery polarity detection module 11 in the main control unit 1 enables accurate determination of the battery's polarity, effectively preventing circuit damage caused by reverse battery connection and improving circuit safety and reliability. Secondly, the connection between the main control unit 1 and the output circuit control unit 9 via the charging circuit switch 12 enables precise control of the charging process, ensuring stable output from the power adapter during charging and allowing for flexible adjustment of the charging strategy according to actual needs. In addition, the introduction of the output current detection module 13 allows the main control unit 1 to monitor the output current in real time; if the current is abnormal, protective measures can be quickly taken to prevent circuit overload or short circuits. This feature not only improves the circuit's self-protection capabilities but also extends the lifespan of the power adapter.

[0024] The battery unit 62 is equipped with a battery voltage connection module 621, through which it is connected to the output current detection unit 61. In this embodiment, the battery voltage connection module 621 ensures stable and accurate voltage transmission between the battery unit 62 and the output current detection unit 61. This connection not only improves the accuracy of the voltage signal but also enhances the overall anti-interference capability of the circuit, enabling the power adapter to maintain stable performance even in complex environments. Furthermore, through the battery voltage connection module 621, the output current detection unit 61 can monitor the discharge state of the battery unit 62 in real time, promptly detecting abnormalities such as overcharging, over-discharging, or battery failure. This helps protect the power adapter from battery problems and extends its service life.

[0025] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A protection circuit for a power adapter, characterized in that: The device includes a main control unit, a temperature detection unit connected to the main control unit, an output voltage and current control unit, a power supply unit, an output voltage detection unit, a battery voltage detection unit, and a battery reverse connection detection unit. The power supply unit is connected to a charger output unit and an output circuit control unit. The output circuit control unit is connected to the main control unit, the output voltage detection unit, the battery voltage detection unit, and the battery reverse connection detection unit. The battery voltage detection unit is connected to an output current detection unit, which is connected to both the main control unit and the battery unit. The temperature detection unit is used for temperature detection. The output voltage and current control unit is used to adjust the output voltage and current. The output circuit control unit is used to turn the battery circuit charging on and off. The output voltage detection unit is used to detect voltage and turn off the output. The output current detection unit is used to adjust the power adapter output power.

2. The protection circuit for a power adapter according to claim 1, characterized in that: The main control unit is an MCU control chip.

3. The protection circuit for a power adapter according to claim 1, characterized in that: The main control unit is connected to a timing unit, which is used for timing and shutting off the output when the charging power exceeds the battery capacity.

4. The protection circuit for a power adapter according to claim 1, characterized in that: The output voltage and current control unit is equipped with a voltage regulation output module and a current regulation output module, and the output voltage and current control unit is connected to the main control unit through the voltage regulation output module and the current regulation output module.

5. The protection circuit for a power adapter according to claim 1, characterized in that: The main control unit is equipped with a battery polarity detection module, and the main control unit is connected to the battery reverse connection detection unit through the battery polarity detection module.

6. The protection circuit for a power adapter according to claim 1, characterized in that: The main control unit is equipped with a charging circuit switch, and the main control unit is connected to the output circuit control unit through the charging circuit switch.

7. The protection circuit for a power adapter according to claim 1, characterized in that: The main control unit is equipped with an output current detection module, and the main control unit is connected to the output current detection unit through the output current detection module.

8. The protection circuit for a power adapter according to claim 1, characterized in that: The battery unit is equipped with a battery voltage connection module, and the battery unit is connected to the output current detection unit through the battery voltage connection module.

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