CN205231801U - Multifunctional mobile phone shell that charges - Google Patents

Abstract

The utility model discloses a multifunctional mobile phone charging case, which comprises a solar panel, a voltage stabilizing circuit current limiting protection module, a charging protector, a lithium battery, a switch type booster, a USB output interface, a wireless charging interface, and an external device Full charge detection system and diodes. The multi-functional mobile phone charging case is a multi-functional charging mobile phone case integrating traditional charging mode, wireless charging mode and solar charging mode. It uses solar charging technology, high-efficiency switching boost power supply, lithium battery charging protection technology, and wireless remote charging technology. and other technologies; it can effectively enhance the battery life of the mobile phone and improve the practicability of the mobile phone case; the use of anti-radiation materials reduces the risk of radiation; The arbitrariness of mobile phone charging is realized; the utility model has diversified charging modes, which is not only beautiful, but also improves people's living standards.

Description

A multifunctional mobile phone charging case

technical field

The utility model belongs to the technical field of power electronics, in particular to a multifunctional mobile phone charging case.

Background technique

At present, the characteristics of large size and low portability of chargers, the confusion and complicated feeling brought by various cables mixed together, the new concept of the 21st century, the pursuit of the legendary "space freedom" gives people simple Comfortable pleasure, because there is a certain radiation risk in the electromagnetic field generated in wireless charging, which restricts the development to a certain extent, how to integrate the functions of multiple charging modes with the mobile phone case, and use a radiation-proof material to reduce its radiation risk, It not only responds to the call for saving (saving space, saving materials), but also makes full use of clean and pollution-free new energy - solar energy. Today, when radio is popularized, we can popularize our wireless in restaurants, coffee shops, KTV, etc. The charging platform enables wireless charging stations to be provided in any place, allowing people to charge at all times. There is no exact report in the literature about the above-mentioned technologies.

Utility model content

The purpose of this utility model is to provide a multifunctional charging mobile phone case integrating traditional charging mode, wireless charging mode and solar charging mode, aiming to solve the problem that the electromagnetic field generated during wireless charging will not cause radiation hazards to people, so that any place Can charge the problem.

The utility model is achieved in this way, a multifunctional mobile phone charging case, including a solar panel, a voltage stabilizing circuit current limiting protection module, a charging protector, a lithium battery, a switch type booster, a USB output interface, a wireless charging interface, The external device is fully charged detection system and diode; the output terminal of the solar panel is electrically connected to the input terminal of the current limiting protection module of the voltage stabilizing circuit, and the output terminal of the current limiting protection module of the voltage stabilizing circuit is electrically connected to the input terminal of the charging protector. The output end of the lithium battery is electrically connected to the input end of the lithium battery, the output end of the lithium battery is electrically connected to the input end of the switch-type booster, and the output end of the switch-type booster is electrically connected to the USB output interface; the wireless charging interface is fully charged by an external device The electrical detection system is electrically connected to the input end of the diode, the output end of the diode is electrically connected to the input end of the charging protector, and the wireless charging interface is electrically connected to the USB output interface by fully charging the external device;

The solar battery panel is provided with a solar power generation battery and a booster circuit, the solar power generation battery is electrically connected to the booster circuit, the solar power generation battery absorbs solar energy to generate current, and the booster circuit regulates the generated current and outputs it to a stable Voltage circuit current limiting protection module;

The current limiting protection module of the voltage stabilizing circuit stabilizes the voltage and limits the current delivered by the solar panel, and delivers the stable current to the charging protector;

According to the detected open circuit voltage of the battery and the rated voltage of the battery, the charging protector calculates the remaining power of the battery to be charged and the power that the battery needs to be charged, and calculates the time that the battery needs to be charged according to the power that the battery needs to be charged. The rated voltage of the battery determines the maximum overcharge voltage of a battery; the current is input to the lithium battery through the charging protector;

The lithium battery charges the lithium battery with constant voltage and constant current through the internal charging circuit, and the lithium battery stores and transmits the current to the switching booster;

The switching booster boosts the current delivered by the lithium battery and delivers it to the USB output interface;

The wireless charging interface is provided with a wireless charging module circuit, and the wireless charging module circuit uses the electromagnetic induction between the wireless transmitting module, the coil and the wireless receiving module to generate an induced current, and fully charges the induced current to the diode through the external device ; The external device is fully charged to detect the power state of the external device.

Further, the boost circuit inside the solar panel is connected as follows: the second pin of the module P1 is respectively connected to the power supply terminal VCC, the input end of the capacitor C3, and the input end of the inductor L1, and the first pin of the module P1 is respectively It is connected to the output terminal of capacitor C3 and the ground terminal GND; the output terminal of inductor L1 is connected to the third pin of module XL6009 and the input terminal of diode D1, and the first pin of module XL6009 is respectively connected to the input terminal of capacitor C1, The input terminal of the resistor R1 is connected to the ground terminal GDD, the fourth pin of the module XL6009 is respectively connected to the power supply terminal VCC, and the output terminal of the capacitor C1; the fifth pin of the module XL6009 is respectively connected to the input terminal of the resistor R2, the resistor R1 The input terminal of the resistor R2 is connected with the output terminal of the diode D1, the input terminal of the capacitor C2, and the second pin of the module P2 respectively; the output terminal of the resistor R1 is connected with the ground terminal GND, and the output terminal of the capacitor C2 The output terminal is connected with the first pin of the module P2.

Further, the multi-functional mobile phone charging case is also provided with a housing, the housing is installed on the side of the solar panel, and the wireless charging module for wireless charging of the mobile phone is installed at the bottom of the housing.

Further, the connection of the charging circuit inside the lithium battery is as follows: the first pin TEMP of the U45 module is connected to the input terminals of the resistor R2 and the resistor R4 respectively, the output terminal of the resistor R4 is connected to the ground terminal GND, and the first pin of the U45 module is connected to the ground terminal GND. The pin PROG is grounded through the resistor R5, the third pin GND of the U45 module is directly grounded, the fourth pin VCC of the U45 module is respectively connected to the LED D1, the LED D2, the eighth pin CE of the U45 module, and the resistor R1. The input terminal, the output terminal of the resistor R2, and the input terminal of the capacitor C1 are connected, the output terminal of the light-emitting diode D1 is connected to the seventh pin CHRG terminal of the U45 module through the resistor R3, and the output terminal of the light-emitting diode D2 is connected to U45 through the resistor R5 The 6th pin of the module is connected to STDBY, the 5th pin of the U45 module is respectively connected to the input terminal of the capacitor C2 and the 1st pin of the module P1, and the output terminal of the capacitor C2 is connected to the ground terminal GND; the module P1’s The second pin is respectively connected to the ground terminal GND, the input end of the resistor R7, the output end of the resistor R7 is respectively connected to the first pin of the module U45, and the input end of the resistor R2; the output end of the resistor R2 is respectively connected to the capacitor C1 The input terminal of the resistor R1 is connected to the input terminal of the resistor R1, the output terminal of the capacitor C1 is connected to the ground terminal GND, and the output terminal of the resistor R1 is connected to the power supply terminal VCC.

Further, the connection of the wireless charging circuit is as follows: the eighth pin of the transmitting end IC1 is electrically connected to the input ends of the capacitors C1 and C2 and the input end of the coil L1, and the output end of the capacitor C1 is electrically connected to the first pin of the receiving end IC2, Both the output end of the capacitor C2 and the output end of the coil L1 are electrically connected to the seventh and eighth pins of the receiving end IC2. The power supply terminal VCC is connected to the 8th pin of the transmitting terminal IC1, the 1st pin of the transmitting terminal IC1 is connected to the input terminal of the resistor R1 and the capacitor C3, the resistor R1 is connected to the 2nd pin of the transmitting terminal IC1, and the output terminal of the capacitor C3 is connected to the transmitting terminal IC1 The 3rd pin is connected, the 4th pin of the transmitter IC1 is connected to the ground GND, the 6th pin of the transmitter IC1 is connected to the 2nd pin of the receiver IC2, and the output terminal of the capacitor C1 is connected to the 2nd pin of the receiver IC2. The terminal GND is connected, the 3rd and 4th pins of the receiving terminal IC2 are connected, the 5th and 7th pins of the transmitting terminal IC1 and the 5th and 6th pins of the receiving terminal IC2 are empty.

Further, a lithium battery is installed inside the housing, a power indicator is installed on the upper end of the housing, a switch is installed on the right end of the power indicator, and the power indicator is connected to the power supply end of the lithium battery; the lower end of the housing is equipped with a Charging interface and USB output interface.

Further, the USB output interface is connected to the power output terminal of the lithium battery through a switch.

Further, the solar battery panel is connected to the casing through a connecting body.

Compared with the prior art, the utility model has the following advantages:

1) The multi-functional mobile phone charging case is a multi-functional charging mobile phone case integrating traditional charging mode, wireless charging mode and solar charging mode, using solar charging technology, high-efficiency switching boost power supply, lithium battery charging protection technology, wireless remote Charging technology and other technologies. Therefore, the multiple charging modes of the utility model can effectively enhance the battery life of the mobile phone and improve the practicability of the mobile phone case.

2) The utility model is a multi-functional charging mobile phone case integrating traditional charging mode, wireless charging mode and solar charging mode, and uses radiation-proof materials to reduce the risk of radiation.

3) The mobile phone case of the present invention is small in size and high in portability, conforms to the new concept of the 21st century, fully utilizes clean and pollution-free solar energy, and realizes the arbitrariness of mobile phone charging.

4) The charging mode of the utility model is diversified, and the charger and the mobile phone case are integrated, which is not only beautiful, but also helps to improve people's living standards.

Description of drawings

Fig. 1 is the working principle diagram of the multifunctional charging mobile phone shell provided by the embodiment of the present invention;

Fig. 2 is the circuit diagram of the step-up circuit that the utility model embodiment provides;

Fig. 3 is a circuit diagram of a charging circuit provided by an embodiment of the present invention;

Fig. 4 is a circuit diagram of the wireless charging module provided by the embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a multifunctional charging mobile phone case provided by an embodiment of the present invention.

In the figure: 1. Shell; 2. Connector; 3. Solar panel; 4. Power indicator; 5. Switch; 6. Lithium battery; 7. Wireless charging interface; 8. USB output interface.

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

The application principle of the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Figure 1: A multifunctional mobile phone charging case, including solar panels 3, voltage regulator circuit current limiting protection module, charging protector, lithium battery 6, switching booster, USB output interface 8, wireless charging interface 7, The external device is fully charged with a detection system and a diode; the output terminal of the solar panel 3 is electrically connected to the input terminal of the current limiting protection module of the voltage stabilizing circuit, and the output terminal of the current limiting protection module of the voltage stabilizing circuit is electrically connected to the input terminal of the charging protector. The output end of the protector is electrically connected to the input end of the lithium battery, the output end of the lithium battery is electrically connected to the input end of the switch-type booster, and the output end of the switch-type booster is electrically connected to the USB output interface 8; the wireless charging interface 7 is connected through the external The fully charged detection system of the device is electrically connected to the input terminal of the diode, the output terminal of the diode is electrically connected to the input terminal of the charging protector, and the wireless charging interface 7 is electrically connected to the USB output interface 8 through the external device fully charged;

The solar battery panel 3 is provided with a solar power generation battery and a booster circuit, the solar power generation battery is electrically connected to the booster circuit, the solar power generation battery absorbs solar energy to generate current, and the booster circuit regulates the generated current and outputs it to Voltage regulator circuit current limiting protection module;

The current limiting protection module of the voltage stabilizing circuit stabilizes the voltage and limits the current delivered by the solar panel, and delivers the stable current to the charging protector;

According to the detected open circuit voltage of the battery and the rated voltage of the battery, the charging protector calculates the remaining power of the battery to be charged and the power that the battery needs to be charged, and calculates the time that the battery needs to be charged according to the power that the battery needs to be charged. The rated voltage of the battery determines the maximum overcharge voltage of a battery; the current is input to the lithium battery through the charging protector;

The lithium battery charges the lithium battery with constant voltage and constant current through the internal charging circuit, and the lithium battery stores and transmits the current to the switching booster;

The switching booster boosts the current delivered by the lithium battery and delivers it to the USB output interface;

The wireless charging interface is provided with a wireless charging module circuit, and the wireless charging module circuit uses the electromagnetic induction between the wireless transmitting module, the coil and the wireless receiving module to generate an induced current, and fully charges the induced current to the diode through the external device ; The external device is fully charged to detect the power state of the external device.

As shown in Figure 2: The boost circuit inside the solar panel is connected as follows: the second pin of the module P1 is connected to the power supply terminal VCC, the input terminal of the capacitor C3, and the input terminal of the inductor L1 respectively, and the first pin of the module P1 The pins are respectively connected to the output terminal of capacitor C3 and the ground terminal GND; the output terminal of inductor L1 is connected to the third pin of module XL6009 and the input terminal of diode D1, and the first pin of module XL6009 is respectively connected to the input terminal of capacitor C1 terminal, the input terminal of resistor R1, and the ground terminal GDD; the fourth pin of the module XL6009 is respectively connected to the power supply terminal VCC and the output terminal of capacitor C1; the fifth pin of the module XL6009 is respectively connected to the input terminal of resistor R2, The input terminal of the resistor R1 is connected; the output terminal of the resistor R2 is respectively connected with the output terminal of the diode D1, the input terminal of the capacitor C2, and the second pin of the module P2; the output terminal of the resistor R1 is connected with the ground terminal GND, and the capacitor The output terminal of C2 is connected with the first pin of module P2.

As shown in Figure 3: The connection of the charging circuit inside the lithium battery is: the first pin TEMP of the U45 module is connected to the input terminals of the resistor R2 and the resistor R4 respectively, the output terminal of the resistor R4 is connected to the ground terminal GND, and the first pin TEMP of the U45 module is connected to the input terminal of the resistor R4. One pin PROG is grounded through the resistor R5, the third pin GND of the U45 module is directly grounded, the fourth pin VCC of the U45 module is respectively connected to the light-emitting diode D1, the light-emitting diode D2, the eighth pin CE of the U45 module, the resistor The input terminal of R1, the output terminal of resistor R2 and the input terminal of capacitor C1 are connected, the output terminal of light-emitting diode D1 is connected with the seventh pin CHRG terminal of U45 module through resistor R3, and the output terminal of light-emitting diode D2 is connected through resistor R5 It is connected to the sixth pin STDBY of the U45 module, the fifth pin of the U45 module is respectively connected to the input terminal of the capacitor C2 and the first pin of the module P1, and the output terminal of the capacitor C2 is connected to the ground terminal GND; the module The second pin of P1 is respectively connected with the ground terminal GND and the input end of resistor R7, and the output end of resistor R7 is respectively connected with the first pin of module U45 and the input end of resistor R2; the output end of resistor R2 is respectively connected with The input terminal of the capacitor C1 is connected to the input terminal of the resistor R1, the output terminal of the capacitor C1 is connected to the ground terminal GND, and the output terminal of the resistor R1 is connected to the power supply terminal VCC.

As shown in Figure 4: the wireless charging circuit is connected as follows: the 8th pin of the transmitting end IC1 is electrically connected to the input end of the capacitor C1, C2 and the input end of the coil L1, and the output end of the capacitor C1 is electrically connected to the first pin of the receiving end IC2 connection, the output end of the capacitor C2 and the output end of the coil L1 are both electrically connected to the 7th and 8th pins of the receiving end IC2. The power supply terminal VCC is connected to the 8th pin of the transmitting terminal IC1, the 1st pin of the transmitting terminal IC1 is connected to the input terminal of the resistor R1 and the capacitor C3, the resistor R1 is connected to the 2nd pin of the transmitting terminal IC1, and the output terminal of the capacitor C3 is connected to the transmitting terminal IC1 The 3rd pin is connected, the 4th pin of the transmitter IC1 is connected to the ground GND, the 6th pin of the transmitter IC1 is connected to the 2nd pin of the receiver IC2, and the output terminal of the capacitor C1 is connected to the 2nd pin of the receiver IC2. The terminal GND is connected, the 3rd and 4th pins of the receiving terminal IC2 are connected, the 5th and 7th pins of the transmitting terminal IC1 and the 5th and 6th pins of the receiving terminal IC2 are empty.

As shown in Figure 5: the multifunctional mobile phone charging case is also provided with a housing 1, the housing is installed on the side of the solar panel 3, and the wireless charging module for mobile phone wireless charging is installed at the bottom of the housing.

The inside of the housing is equipped with a lithium battery 6, the upper end of the housing 1 is equipped with a power indicator light 4, and the right end of the power indicator light is equipped with a switch 5, and the power indicator light 4 is connected to the power supply end of the lithium battery 6; The lower end of 1 is equipped with wireless charging interface 7 and USB output interface 8.

The USB output interface 8 is connected with the power output terminal of the lithium battery 6 through the switch 5 .

The solar cell panel 3 is connected to the casing 1 through the connecting body 2 .

The utility model changes the method of the traditional single charging mode and provides people with convenient and beautiful resources. The solar panel absorbs electric energy and transmits it to the current limiting protection module of the voltage stabilizing circuit, and the current is transmitted to the charging protector through the current limiting protection module of the voltage stabilizing circuit; The wireless charging interface is connected with an external power supply to detect whether the external device is fully charged. If it is fully charged, it will be transmitted to the charging protector through a diode. If it is detected that the external device is not fully charged, it will directly output power through the USB output interface; charging The protector outputs power to the lithium battery, and the lithium battery is connected to the USB output interface through a switch type booster. The wireless charger gives priority to charging the mobile phone, and charges the lithium battery after the mobile phone is fully charged; the solar panel provides the power required for the mobile phone in standby mode when the power of the mobile phone is low, and the lithium battery charges the mobile phone when the solar energy is insufficient.

Using the principle of solar charging, high-efficiency switching boost power supply and other principles, relying on the combination of solar panels and 3.7v lithium batteries, using a boost chip to raise the voltage to 5v, and using the USB interface to charge the phone directly. Selective power supply through voltage comparison, when the mobile phone has sufficient power, use the solar receiver panel attached to the mobile phone case to convert solar energy into electrical energy, and store it in the attached lithium battery under the mobile phone case; when the mobile phone power is insufficient, first Use the previously stored electricity to charge the mobile phone to ensure the normal use of the mobile phone. Using the principle of radio charging, the power input by the transmitting end (base device) uses the principle of electromagnetic induction to transmit electromagnetic signals to the receiving end (mobile phone shell) through the coil, and the obtained voltage is boosted to selectively power the mobile phone and the battery. The traditional charging mode is realized by connecting the cable charger with the USB interface. Complete the multi-function charging mode.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (8)

1. A multifunctional mobile phone charging case, characterized in that, the multifunctional mobile phone charging case includes a solar panel, a voltage stabilizing circuit current limiting protection module, a charging protector, a lithium battery, a switching booster, and a USB output interface , wireless charging interface, external device full charge detection system and diode; The output terminal of the solar battery panel is electrically connected to the input terminal of the current limiting protection module of the voltage stabilizing circuit, the output terminal of the current limiting protection module of the voltage stabilizing circuit is electrically connected to the input terminal of the charging protector, and the output terminal of the charging protector is electrically connected to the input terminal of the lithium battery , the output end of the lithium battery is electrically connected to the input end of the switch-type booster, and the output end of the switch-type booster is electrically connected to the USB output interface; the wireless charging interface is electrically connected to the input end of the diode through an external device full charge detection system, The output terminal of the diode is electrically connected to the input terminal of the charging protector, and the wireless charging interface is electrically connected to the USB output interface by fully charging the external device; The solar battery panel is provided with a solar power generation battery and a booster circuit, the solar power generation battery and the booster circuit are electrically connected, the solar power generation battery absorbs solar energy to generate current, and the booster circuit regulates the generated current and outputs it to Voltage regulator circuit current limiting protection module; The current limiting protection module of the voltage stabilizing circuit stabilizes the voltage and limits the current delivered by the solar panel, and delivers the stable current to the charging protector; According to the detected open circuit voltage of the battery and the rated voltage of the battery, the charging protector calculates the remaining power of the battery to be charged and the power that the battery needs to be charged, and calculates the time that the battery needs to be charged according to the power that the battery needs to be charged, and at the same time According to the rated voltage of the battery, determine the maximum overcharge voltage of a battery, and the current is input to the lithium battery through the charging protector; The lithium battery charges the lithium battery with constant voltage and constant current through the internal charging circuit, and the lithium battery stores and transmits the current to the switching booster; The switching booster boosts the current delivered by the lithium battery and delivers it to the USB output interface; The wireless charging interface is provided with a wireless charging module circuit, and the wireless charging module circuit uses the electromagnetic induction between the wireless transmitting module, the coil and the wireless receiving module to generate an induced current, and fully charges the induced current to the diode through the external device ; The external device is fully charged to detect the power state of the external device. 2. The multifunctional mobile phone charging case according to claim 1, wherein the boost circuit inside the solar panel is connected as follows: The second pin of the module P1 is respectively connected with the power supply terminal VCC, the input terminal of the capacitor C3, and the input terminal of the inductor L1, and the first pin of the module P1 is respectively connected with the output terminal of the capacitor C3 and the ground terminal GND; the inductor L1 The output terminal of the module XL6009 is connected to the third pin of the module XL6009 and the input terminal of the diode D1. The first pin of the module XL6009 is respectively connected to the input terminal of the capacitor C1, the input terminal of the resistor R1 and the ground terminal GDD. The module XL6009’s The 4th pin is connected to the power supply terminal VCC and the output terminal of the capacitor C1 respectively; the 5th pin of the module XL6009 is connected to the input terminal of the resistor R2 and the input terminal of the resistor R1 respectively; the output terminal of the resistor R2 is respectively connected to the diode D1 The output terminal of the capacitor C2 is connected to the second pin of the module P2; the output terminal of the resistor R1 is connected to the ground terminal GND, and the output terminal of the capacitor C2 is connected to the first pin of the module P2. 3. The multifunctional mobile phone charging case according to claim 1, wherein the charging circuit inside the lithium battery is connected as follows: The first pin TEMP of the U45 module is connected to the input terminals of the resistor R2 and the resistor R4 respectively, the output terminal of the resistor R4 is connected to the ground terminal GND, the first pin PROG of the U45 module is grounded through the resistor R5, and the first pin PROG of the U45 module is grounded through the resistor R5. The three-pin GND terminal is directly grounded, and the fourth pin VCC of the U45 module is respectively connected to the light-emitting diode D1, the light-emitting diode D2, the eighth pin CE of the U45 module, the input terminal of the resistor R1, the output terminal of the resistor R2, and the capacitor C1 The input terminal of the light-emitting diode D1 is connected to the 7th pin CHRG terminal of the U45 module through the resistor R3, and the output terminal of the light-emitting diode D2 is connected to the 6th pin STDBY of the U45 module through the resistor R5. U45 The fifth pin of the module is connected to the input terminal of the capacitor C2 and the first pin of the module P1 respectively, and the output terminal of the capacitor C2 is connected to the ground terminal GND; the second pin of the module P1 is respectively connected to the ground terminal GND, the resistor The input terminal of R7 is connected, the output terminal of resistor R7 is connected with the first pin of module U45 and the input terminal of resistor R2 respectively; the output terminal of resistor R2 is connected with the input terminal of capacitor C1 and the input terminal of resistor R1 respectively , the output terminal of the capacitor C1 is connected to the ground terminal GND, and the output terminal of the resistor R1 is connected to the power supply terminal VCC. 4. The multifunctional mobile phone charging case according to claim 1, wherein the wireless charging circuit is connected as follows: The 8th pin of the transmitting end IC1 is electrically connected to the input ends of the capacitors C1 and C2 and the input end of the coil L1, the output end of the capacitor C1 is electrically connected to the first pin of the receiving end IC2, and the output end of the capacitor C2 is connected to the output of the coil L1 Both terminals are electrically connected to the 7th and 8th pins of the receiver IC2, the power supply terminal VCC is connected to the 8th pin of the transmitter IC1, the first pin of the transmitter IC1 is connected to the input terminals of the resistor R1 and the capacitor C3, and the resistor R1 is connected to the input terminal of the capacitor C3. The second pin of transmitter IC1 is connected, the output of capacitor C3 is connected to the third pin of transmitter IC1, the fourth pin of transmitter IC1 is connected to the ground terminal GND, the sixth pin of transmitter IC1 is connected to the first pin of receiver IC2 2-pin connection, the output terminal of capacitor C1 is connected to the second terminal GND of the ground receiving terminal IC2, the 3rd and 4th pins of the receiving terminal IC2 are connected, the 5th and 7th pins of the transmitting terminal IC1 are connected to the receiving terminal IC2 The 5th and 6th pins are empty. 5. The multifunctional mobile phone charging case as claimed in claim 1, wherein the multifunctional mobile phone charging case is also provided with a housing, and the housing is installed on the side with a solar panel, and the mobile phone The wireless charging module for wireless charging is installed at the bottom of the case. 6. The multi-functional mobile phone charging case as claimed in claim 5, wherein a lithium battery is installed inside the case, a power indicator light is installed on the upper end of the case, and a switch is installed on the right end of the power light indicator, and the power The indicator light is connected with the power supply end of the lithium battery; a charging interface and a USB output interface are installed at the lower end of the casing. 7. The multifunctional mobile phone charging case according to claim 5, wherein the USB output interface is connected to the power output terminal of the lithium battery through a switch. 8. The multifunctional mobile phone charging case according to claim 1, wherein the solar cell panel is connected to the case through a connecting body.