CN210156961U - A mobile phone charger with self-inspection and protection - Google Patents

Abstract

The utility model relates to a mobile phone charger of self-checking and protection. Be equipped with sealed charger shell, charger shell upper surface is provided with the screen, be equipped with microcontroller and be used for providing charging power supply's main circuit, protection circuit and warning circuit for the cell-phone with being connected with this microcontroller in the charger shell, the side of charger shell is equipped with the cell-phone battery temperature detection interface, cell-phone radiation detection interface, the USB interface that charges who is connected with microcontroller, the charger still is provided with the inside temperature sensor of charger, detects charging current and detects the control circuit of charging time. The utility model has simple structure, easy realization, lower cost, convenient carrying, no occasion restriction, and can cut off the power supply in time and send out alarm to the problem that the mobile phone is possibly on fire or even explodes due to charging, and meanwhile, the service life of the mobile phone battery can be prolonged, and the user can know the charging process and the radiation condition of the use of the mobile phone; the operation is very convenient, and the device has the characteristics of automatic control detection, alarm and protection.

Description

A mobile phone charger with self-inspection and protection

technical field

The utility model relates to a mobile phone charger with self-checking and protection.

Background technique

At present, with the continuous upgrading and iteration of mobile phones, especially the arrival of the 5G era, people's dependence on mobile phones will further increase. The existing mobile phone chargers on the market have almost no fundamental changes, and are equipped with simple chargers with a single charging function. This kind of simple charger, on the one hand, keeps the user ignorant about the charging situation of the mobile phone, and cannot charge it scientifically and rationally, which will not only shorten the service life of the mobile phone battery, but also may affect the user's health due to excessive radiation caused by incorrect use of the mobile phone; On the other hand, a charger with only a single charging function may cause a fire or even an explosion if it is charged for a long time or if the battery fails or the charger fails (such incidents are reported in various media every year) , such losses and injuries cannot be warned in advance and protected in time. In recent years, although wireless chargers have been gradually used in mobile phone chargers, they have high cost, low charging efficiency, and the lack of increased radiation sources, and they still only provide a single charging function, which limits their application and promotion to a large extent.

SUMMARY OF THE INVENTION

The purpose of this utility model patent is to provide a mobile phone charger with self-inspection and protection, which has the advantages of simple structure, easy implementation and low cost, and greatly reduces the risk of fire or explosion caused by the charging of the mobile phone. safety.

In order to achieve the above purpose, the technical scheme of the present utility model is: a self-checking and protecting mobile phone charger, which is provided with a sealed charger shell, the upper surface of the charger shell is provided with a screen, and the charger shell is provided with a screen inside. There is a microcontroller and a charging main circuit connected with the microcontroller for providing charging power for the mobile phone. The side of the charger shell is provided with a mobile phone battery temperature detection interface, a mobile phone radiation detection interface, USB charging interface.

In an embodiment of the utility model patent, the upper surface of the charger shell is also provided with an opening for installing a fuse, an alarm indicator light, a buzzer, a power button, and a reset switch, and the power button has a power indicator. lamp.

In an embodiment of the patent of the present invention, the mobile phone battery temperature detection interface and the mobile phone radiation detection interface are respectively used for detecting the battery temperature of the mobile phone when the mobile phone is being charged. Mobile phone radiation detection sensor to connect.

In an embodiment of the present utility model patent, the charging main circuit includes a power transformer, a current transformer, a rectifier, a voltage regulator, an output protection circuit, an input protection circuit, and a temperature sensor inside the charger; when the power button is pressed , AC220V is charged for mobile phones through fuses, power transformers, rectifiers, voltage regulators, output protection circuits, and USB charging interfaces. The power transformer is also connected to the microcontroller through an input protection circuit, and the power transformer is connected by a reset switch. Control reset, the rectifier is also connected to the microcontroller via a current transformer, and the temperature sensor inside the charger is connected to the microcontroller.

In an embodiment of the patent of the present invention, the microcontroller includes a microprocessor and a peripheral input circuit, an output drive circuit, a rechargeable lithium battery, and an internal memory connected to the microprocessor. The microcontroller also includes A four-way A/D converter, the four-way A/D converter is respectively connected with the peripheral input circuit, the current transformer, and the temperature sensor inside the charger, the four-way A/D converter (or the four-way A/D converter The peripheral circuit in the /D converter) is also connected with the mobile phone battery temperature detection sensor and the mobile phone radiation detection sensor through the mobile phone battery temperature detection interface and the mobile phone radiation detection interface respectively, and the rechargeable lithium battery is also connected with the output protection circuit and the output drive circuit. The output drive circuit is also connected with the input protection circuit, the screen alarm indicator light, the buzzer and the output protection circuit.

Compared with the prior art, the utility model has the following beneficial effects: the utility model has the advantages of simple structure, easy implementation, low cost and convenient portability by designing a charger with self-checking and protection and integrating it into a sealed box. , not limited by the occasion, if the mobile phone may catch fire or even explode due to charging, it can cut off the power supply in time and issue an alarm, at the same time, it can prolong the service life of the mobile phone battery, and let the user know the charging process of the mobile phone and the radiation used; operation It is very convenient and has the characteristics of automatic control detection, alarm and protection.

Description of drawings

FIG. 1 is a schematic structural diagram of a sealing box according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of a hardware structure of an embodiment of the present invention.

FIG. 3 is a circuit schematic diagram of the microcontroller of the present invention.

In Figures 1 to 3, each mark indicates: 1-Charger shell; 11-Power button; 12-Screen; 13-Reset switch, 14-USB charging interface; 15-Mobile phone battery temperature detection interface; 16-Mobile phone radiation Detection interface, 17-alarm indicator light, 18-buzzer, 19-fuse, 2-charging main circuit, 21-power transformer, 22-current transformer, 23-rectifier, 24-voltage regulator, 25-output Protection circuit, 26-Input protection circuit, 27-Charger temperature sensor, 3-Additional detection part of mobile phone, 31-Mobile phone battery temperature detection sensor, 32-Mobile phone radiation detection sensor, 4-Microcontroller, 41-Quad A /D converter, 42-peripheral input circuit, 43-microprocessor, 44-output drive circuit, 45-rechargeable lithium battery, 46-internal memory.

Detailed ways

The technical solutions of the present utility model will be described in detail below with reference to the accompanying drawings.

In FIGS. 1 to 3 , a mobile phone charger with its own detection and protection is provided with a sealed charger casing 1 . The charger casing 1 is provided with a screen 12 and an operation part, and the charging main body is arranged in the charger casing 1 The circuit 2 and the microcontroller 4 are integrated in a box, and the charging main circuit 2 provides charging power for the mobile phone 00 and provides related protection. The microcontroller 4 automatically detects and analyzes the charging parameters of the mobile phone 00 in real time, and provides its charging information or Alarm information, and timely judgment whether the charger enters the power-off protection state. In addition, additional detection parts of the mobile phone are also configured, including mobile phone battery temperature detection sensors (such as PT100) 31 and mobile phone radiation detection sensors (such as LZT1000) 32. The battery temperature during charging and the radiation generated during use of the mobile phone can be detected respectively.

The front of the charger housing 1 is provided with a screen 12 and an operating part, and an operating part is provided on the side of the screen 12, including a fuse 19, a power button with an indicator light 11, a reset switch 13, an alarm indicator light 17 and a buzzer 18 , One side of the charger housing 1 is provided with a USB charging interface 14 of the mobile phone 00 , a mobile phone battery temperature detection interface 15 , and a mobile phone radiation detection interface 16 .

The charging main circuit 2 of the charger includes a power transformer 21, a current transformer 22, a rectifier 23, a voltage regulator 24, an output protection circuit 25, an input protection circuit 26, and a temperature sensor 27 inside the charger (eg PT100).

The microcontroller 4 of the charger includes a four-way A/D converter (or replaced by an independent four-way A/D converter) 41, a peripheral input circuit 42, a microprocessor 43, an output driving circuit 44, a rechargeable lithium Battery 45 , internal memory 46 .

The use method of a mobile phone charger with self-contained detection and protection of the present utility model is as follows:

(1) Preparatory work, as with the simple charger, connect the two ends of the charging cable of the mobile phone 00 to the USB port 14 of the charger and the charging port of the mobile phone 00 respectively. When the battery temperature of the mobile phone needs to be detected, the temperature of the mobile phone can be The connector of the sensor 31 is inserted into the mobile phone temperature detection interface 15 of the charger, and the sensor is placed on the back of the mobile phone where the battery is placed. When the radiation of the mobile phone needs to be detected, the connector of the radiation sensor 32 can be inserted into the mobile phone radiation detection interface 16 of the charger. , place its sensor at a distance of 5 to 10 cm from the mobile phone;

(2) Press the "Power" button 11, the power is turned on, the indicator light is on, the charger first enters the "self-test", press the "Power" button 11 again, the indicator light of the power supply is off, and the charger stops working, At the same time, exit "self-test";

(3) When the self-test is "abnormal", exit the working state and enter the alarm prompt, the alarm indicator 17 is on, the buzzer 18 makes a sound, and the output protection circuit 25 of the charger cuts off the output (that is, does not charge), and the screen displays Self-check abnormal information, press the "reset" button 13, and enter the "self-check" again, if it continues to enter the alarm, you should disconnect the power supply to eliminate the fault before continuing to use, when the "self-check" is normal, go to the next procedure;

(4) The charger starts to charge the mobile phone. The external power supply passes through the power button 11 and the fuse 19, and then enters the charging main circuit 2, including the power transformer 21, the input protection circuit 26, the current transformer 22, the rectifier 23, and the voltage regulator 24. , the output protection circuit 25 is charged to the mobile phone by the USB charging interface 14;

(5) At the same time during the charging process, the microcontroller 4 enters the detection and monitoring state. The first is the overload judgment. If the charger or battery has a serious overload such as a short circuit, the fuse 19 of the charging main circuit 2 will be quickly blown. The input protection circuit 26 cuts off the external power supply, the output protection circuit 25 cuts off the charging power supply, and the screen 12 is powered by the micro lithium battery 45 to display the overload information, including the alarm indicator 17 is on, the buzzer 18 sounds, and the charger or battery needs to be removed. It can be put into use again after the failure and the replacement of the fuse (or the replacement of the battery); if there is no overload, go to the next step;

(6) During the charging process of the mobile phone, by detecting the internal temperature AT1 of the charger or the external battery temperature AT2, and making a judgment, if the temperature exceeds the limit, it will enter the alarm, the alarm indicator 17 will be on, and the buzzer 18 will sound. Sound, cut off the external power supply through the input protection circuit 26, and also disconnect the charging through the output protection circuit 25, and the screen 12 displays the corresponding over-temperature information; if the temperature is normal, continue to charge and enter the next step;

(7) While charging the mobile phone 00 normally, the charger also monitors and stores the charging current AI in real time, and compares and analyzes it with the set value in real time. If the charging current AI is abnormal and the duration exceeds the predetermined limit, immediately Entering the alarm, the alarm indicator 17 is on, the buzzer 18 makes a sound, the external power supply is disconnected through the input protection circuit 26, and the charging is also disconnected through the output protection circuit 25, and the screen 12 displays the current over-limit information. one-step procedure;

(8) While the charger is charging the mobile phone 00 normally, it also calculates, stores and compares and analyzes the charging time T of the mobile phone with the set value in real time. If the charging time exceeds the limit, it will enter an alarm, and the alarm indicator 17 will be on. , the buzzer 18 makes a sound, and the charging is only cut off through the output protection circuit 25, and the screen 12 displays the timeout information;

(9) When the user communicates with the mobile phone, if he needs to know the radiation situation, he can detect the radiation amount by connecting the mobile phone radiation detection sensor 32, and display the current radiation value on the screen 12. The alarm indicator 17 is on, and the buzzer 18 makes a sound.

The above are the preferred embodiments of the present utility model, all changes made according to the technical solutions of the present utility model, when the resulting functional effects do not exceed the scope of the technical solutions of the present utility model, belong to the protection scope of the present utility model.

Claims (5)

1. The utility model provides a cell-phone charger of self-checking and protection, is equipped with sealed charger shell, its characterized in that, the charger shell upper surface is provided with the screen, be equipped with microcontroller and the main circuit that charges who is used for providing charging source for the cell-phone that is connected with this microcontroller in the charger shell, the side of charger shell is equipped with the cell-phone battery temperature detection interface, cell-phone radiation detection interface, the USB interface that charges who is connected with microcontroller.

2. The self-checking and protecting mobile phone charger according to claim 1, wherein the upper surface of the charger housing is further provided with an opening for installing a fuse, an alarm indicator, a buzzer, a power button and a reset switch, and the power button is provided with a power indicator.

3. The self-testing and protecting mobile phone charger according to claim 1, wherein the mobile phone battery temperature detecting interface and the mobile phone radiation detecting interface are respectively connected to a mobile phone battery temperature detecting sensor for detecting the battery temperature of the mobile phone during charging and a mobile phone radiation detecting sensor for detecting the radiation generated by the mobile phone during use.

4. The self-checking and protecting mobile phone charger according to claim 2, wherein the charging main circuit comprises a power transformer, a current transformer, a rectifier, a voltage stabilizer, an output protection circuit, an input protection circuit, and a temperature sensor inside the charger; when power button pressed, AC220V charges for the cell-phone through fuse, power transformer, rectifier, stabiliser, output protection circuit, USB interface that charges, power transformer still through input protection circuit with microcontroller connects, power transformer resets by reset switch control, the rectifier still through current transformer with microcontroller connects, the inside temperature sensor of charger with microcontroller connects.

5. The self-test and protection mobile phone charger according to claim 4, wherein the microcontroller comprises a microprocessor, and a peripheral input circuit, an output driving circuit, a rechargeable lithium battery, an internal memory connected to the microprocessor, the microcontroller further comprises a four-way A/D converter, the four-way A/D converter is respectively connected to the peripheral input circuit, the rechargeable lithium battery, the current transformer, and a temperature sensor inside the charger, the four-way A/D converter is respectively connected to the mobile phone battery temperature detecting sensor and the mobile phone radiation detecting sensor through a mobile phone battery temperature detecting interface and a mobile phone radiation detecting interface, the rechargeable lithium battery is further connected to the output protection circuit and the output driving circuit to provide electric energy, the output driving circuit is further connected to the input protection circuit, the rechargeable lithium battery, and the internal memory, The alarm indicator light, the buzzer and the output protection circuit are connected.

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