CN204651989U - A kind of Multifunctional portable power source based on battery of mobile terminal - Google Patents

Abstract

The utility model discloses a multifunctional mobile power supply based on a mobile terminal battery, comprising: a second clamping device and a first clamping device located on the front and back sides of the multifunctional mobile power supply, and a charging and discharging circuit located inside the multifunctional mobile power supply , the output 5V USB A socket, the output 3.7V USB A socket, and the 5V input Micro USB socket are located on the upper side of the multi-functional mobile power supply; the first and second clamping devices include sliding ends and non-sliding ends respectively, and the above-mentioned same clamping The sliding end and the non-sliding end of the device cooperate with each other to fix batteries of different specifications and sizes. The utility model uses the battery of the mobile terminal as the battery cell, adopts a clamping device with a sliding handle to fix the battery, and outputs two voltages of 5V and 3.7V to meet the electricity demand of different electronic equipment and realize the idle mobile terminal battery The recycling reuse maximizes the battery's performance within its lifespan.

Description

A kind of multifunctional mobile power supply based on mobile terminal battery

technical field

The utility model relates to the technical field of mobile power supplies, in particular to a multifunctional mobile power supply based on mobile terminal batteries.

Background technique

Because the batteries of mobile terminals (such as lithium batteries) have the advantages of multiple charging and power supply, long service life, and large charge capacity, they are widely used in daily life, especially with the generation and popularization of mobile phones, making lithium batteries Application scenarios can be seen everywhere. However, with the development of science and technology and the progress of society, people change their mobile phones faster and faster. Because the battery specifications used by different mobile phones are very different, different types of mobile phone batteries are basically not universal, resulting in the replacement of new mobile phones. The batteries are set aside as idle lithium batteries. The idleness of lithium batteries makes many mobile phone batteries that can function normally become useless, causing a great waste of resources. At the same time, it is difficult to recycle lithium batteries, and the degree of pollution to the environment is extremely high. Facing a large number of mobile phone lithium batteries and their harm to the environment, it is particularly important to reuse idle mobile phone lithium batteries.

Utility model content

The purpose of this utility model is to overcome the shortcomings and deficiencies of the prior art, and provide a multifunctional mobile power supply based on mobile terminal batteries. The utility model takes the reuse of idle mobile terminal batteries in daily life as the core, and aims to improve The utilization rate of the battery of the mobile terminal is to maximize its use efficiency within the service life of the battery of the mobile terminal.

The purpose of this utility model is achieved through the following technical solutions:

A multifunctional mobile power supply based on a mobile terminal battery, including: a second clamping device 2 and a first clamping device 1 located on the front and back sides of the multifunctional mobile power supply, charging and discharging devices located inside the multifunctional mobile power supply Circuit, the output 5V USB A socket 31, the output 3.7V USB A socket 32 and the 5V input Micro USB socket 4 located on the upper side of the multifunctional mobile power supply;

The first clamping device and the second clamping device respectively comprise a sliding end 11 of the first clamping device, a non-slidable end 12 of the first clamping device and a sliding end 21 of the second clamping device, a non-slidable end of the second clamping device End 22, the sliding end and the non-sliding end of the same clamping device cooperate with each other to fix mobile terminal batteries of different sizes;

The charging and discharging circuit is used to control the charging and discharging process of the mobile terminal battery fixed on the above-mentioned clamping device;

The output 5V USB A socket and the output 3.7V USB A socket are connected to the charging and discharging circuit, and are used for the USB output ports of the 5V and 3.7V DC power supply voltages of the multifunctional mobile power supply;

The 5V input Micro USB socket is connected to the charging and discharging circuit, and is used for the USB input port of the 5V DC charging voltage of the multifunctional mobile power supply.

Further, the multifunctional mobile power supply also includes an LED power indicator light 5 located on its upper side, the LED power indicator light includes four LED lamp beads, connected with the charging and discharging circuit, and used to display The electric quantity of the battery of the mobile terminal on the first clamping device and the second clamping device.

Further, the charging and discharging circuit includes an input port, a 3.7V output port, a 5V output port, a charging module, a power supply module, a battery power detection display module and a control module,

Wherein, the charging module is connected to the 5V input Micro USB socket through the input port, and when the 5V input Micro USB socket has a 5V voltage input, the charging module converts the 5V voltage of the input port into a 4.2V battery Charging the battery of the mobile terminal fixed on the first or second holding device after charging the voltage;

The power supply module is respectively connected to the output 3.7V USB A socket and the output 5V USB A socket through the 3.7V output port and the 5V output port, when fixed on the first or second clamping When the battery voltage of the mobile terminal on the device is greater than 3.5V, the power supply module is turned on, and both the output 3.7V USB A socket and the output 5V USB A socket can supply power and output normally. When fixed on the first or second clamping device When the mobile terminal battery voltages on the battery are all less than 3.5V, the power supply module is turned off, and the output voltage of the output 3.7V USB A socket and the output 5V USB A socket is zero;

The battery power detection and display module is used to detect the battery power of the mobile terminal on the first or second clamping device and display it through the LED power indicator connected to it;

The control module is connected to the output 3.7V USB A socket, the output 5V USB A socket and the 5V input MicroUSB socket through the 3.7V output port, the 5V output port, and the input port respectively. The control module includes a monitoring protection circuit and a control circuit. When the control module detects that the output 3.7V USB A socket or the output 5V USB A socket is externally connected with a 3.7V or 5V device, the control circuit automatically switches the The multifunctional mobile power supply wakes up and supplies power to the outside. When it is detected that the 5V input Micro USB socket has a 5V input voltage, the control circuit automatically wakes up the multifunctional mobile power supply, and the first or second clamping The mobile terminal battery on the device is charged; when it is detected that the input port has overvoltage input or overcurrent input, the 3.7V output port or the 5V output port has overvoltage output or overcurrent output, or the power supply If the module has no output beyond the first specified time, the monitoring and protection circuit will automatically shut down the multifunctional mobile power supply and make it enter a dormant state.

Further, the non-slidable end 12 of the first clamping device is provided with a first chute 121, and two first metal contact pins 122 and a second metal contact pin 122 which can move along the chute are arranged below the first chute. A contact pin 123, two first sliding handles 124 and a second sliding handle 125 that can move along the sliding groove are arranged in the first sliding groove, and the first metal contact pin 122 is connected with the first sliding handle 124 , the second metal contact pin 123 is connected to the second sliding handle 125, and the distance between the two metal contact pins is adjusted by moving the sliding handle arranged in the first sliding groove.

Further, the non-slidable end 22 of the second clamping device is provided with a second chute 221, and two third metal contact pins 222 and a fourth metal contact pin 222 which can move along the chute are arranged below the second chute. Contact pin 223, two third sliding handles 224 and fourth sliding handles 225 that can move along the sliding grooves are arranged in the second sliding groove, and the third metal contact pin 222 is connected with the third sliding handle 224 , the fourth metal contact pin 223 is connected to the fourth sliding handle 225, and the distance between the above two metal contact pins is adjusted by moving the sliding handle arranged in the second sliding slot.

Further, the first designated time is 5 seconds.

Further, the first metal contact pin 122 is connected to the third metal contact pin 222 and connected to the same node on the internal circuit, and the second metal contact pin 123 and the fourth metal contact pin 223 connected to another node on the internal circuit;

At the same time, the first metal contact pin 122 and the third metal contact pin 222 are used to contact the negative electrode of the battery, and the second metal contact pin 123 and the fourth metal contact pin 223 are used to contact the positive electrode of the battery.

Further, the mobile terminal battery is a rechargeable battery made of nickel cadmium, nickel hydrogen, lithium ion or lithium polymer.

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

1. The utility model uses the battery of the mobile terminal as the battery cell, and uses a clamping device with a sliding handle to fix the battery of the mobile terminal, which can realize the recycling of the idle mobile terminal battery, and prolong the life of the battery to the greatest extent. use efficiency.

2. The utility model can output two kinds of voltages of 5V and 3.7V to meet the electricity demand of different electronic equipment.

Description of drawings

FIG. 1 is an overall schematic diagram of a multifunctional mobile power supply based on a mobile terminal battery;

Fig. 2 is the front view of the multifunctional mobile power supply based on the mobile terminal battery;

Fig. 3 is the rear view of the multifunctional mobile power supply based on the mobile terminal battery;

Fig. 4 is the right view of the multifunctional mobile power supply based on the mobile terminal battery;

Fig. 5 is the top view of the multifunctional mobile power supply based on mobile terminal battery;

Fig. 6 is a schematic diagram of a mobile power supply with batteries of different sizes fixed respectively;

7 is a schematic diagram of the module composition and connection of the charging and discharging circuit;

The components are marked as follows: 1—the first clamping device, 11—the sliding end of the first clamping device, 12—the non-slidable end of the first clamping device, 121—the first chute, 122—the first metal contact pin, 123—the second metal contact pin, 124—the first sliding handle, 125—the second sliding handle, 2—the second clamping device, 21—the sliding end of the second clamping device, 22—the non-slidable end of the second clamping device , 221—the second chute, 222—the third metal contact pin, 223—the fourth metal contact pin, 224—the third slider, 225—the fourth slider, 31—output 5V USBA socket, 32—output 3.7V USB A socket, 4-5V input Micro USB socket, 5-LED power indicator.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model more clear and definite, the utility model will be further described in detail below with reference to the accompanying drawings and examples. 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.

Example

Please refer to FIG. 1 . FIG. 1 is an overall schematic diagram of a multifunctional mobile power supply based on a mobile terminal battery in this embodiment. The multifunctional mobile power supply shown in Figure 1 is based on the idle mobile terminal batteries in daily life (such as digital cameras, mobile phone detachable rechargeable batteries, which can be rechargeable batteries made of nickel cadmium, nickel metal hydride, lithium ion, and lithium polymer materials) ) as the core, aiming to improve the utilization rate of idle mobile terminal batteries, and maximize their use efficiency within the service life of mobile terminal batteries.

The structure and function of the multifunctional mobile power supply based on the battery of the mobile terminal in this embodiment will be described in detail below with reference to FIG. 1 to FIG. 7 .

The multifunctional mobile power supply based on the mobile terminal battery consists of the second clamping device 2 and the first clamping device 1 respectively located on the front and back sides, a charging and discharging circuit, an output 5V USB A socket 31, and an output 3.7V USB A socket 32. It is composed of a 5V input Micro USB socket 4 and an LED power indicator 5. When the mobile terminal battery is clamped on any one or both clamping devices: if there is a 5V DC voltage in the 5V input Micro USB socket, the 5V voltage can charge the mobile terminal battery after passing through the charging module of the charging and discharging circuit; if the mobile terminal If the voltage of the battery is greater than 3.5V, after the terminal voltage of the mobile terminal battery passes through the power supply module of the charging and discharging circuit, both the output 5V USB A socket and the output 3.7V USB A socket can output normally. Using the 3.7V output terminal, it can supply power for lithium battery energy-saving lamps, USB fans, LED lamp beads, remote control toys and other electronic equipment; using the 5V output terminal, it can directly supply power for mainstream electronic equipment such as mobile phones, tablet computers, digital cameras, etc. Both the front and back clamping devices of the multifunctional mobile power supply in this embodiment can fix the mobile terminal battery, so at most two mobile terminal batteries can be fixed, and when at least one of the clamping devices is fixed with the mobile terminal battery, the device works fine.

Each part is described in detail below.

(1) First and second clamping devices.

The utility model includes two clamping devices, which are respectively the second clamping device 2 located on the front of the multifunctional mobile power supply and the first clamping device 1 located on the opposite side of the multifunctional mobile power supply, wherein the first clamping device 1 includes the second clamping device 1 A clamping device sliding end 11 and the first clamping device non-slidable end 12, the second clamping device 2 includes the second clamping device sliding end 21 and the second clamping device non-slidable end 22, the above-mentioned sliding end and the non-slidable end The two terminals cooperate to fix the mobile terminal batteries of different specifications and sizes.

There is a first chute 121 on the non-slidable end 12 of the first clamping device, and there are two metal contact pins that can move along the chute below the first chute, namely the first metal contact pin 122 and the second metal contact pin. 123. There are two sliding handles that can move along the first sliding groove, which are the first sliding handle 124 and the second sliding handle 125 respectively. The first metal contact pin 122 links to each other with the first sliding handle 124, and the second metal contact pin 123 links to each other with the second sliding handle 125. The distance between the two metal contact pins can be adjusted by moving the sliding handle in the chute, thereby The two metal contact pins can fully and firmly contact the positive and negative poles of the mobile terminal battery, thereby adapting to mobile terminal batteries with different spacing between the positive and negative poles.

Similarly, a second chute 221 is formed on the non-slidable end 22 of the second clamping device, and there are two metal contact pins that can move along the chute below the second chute, which are respectively the third metal contact pin 222 and the fourth metal contact pin 222. The metal contact pin 223 has two sliding handles that can move along the sliding groove in the second sliding groove, which are respectively the third sliding handle 224 and the fourth sliding handle 225 . The third metal contact pin 222 links to each other with the third sliding handle 224, and the fourth metal contact pin 223 links to each other with the fourth sliding handle 225. The distance between the two metal contact pins can be adjusted by moving the sliding handle in the chute, thereby The two metal contact pins can fully and firmly contact the positive and negative poles of the mobile terminal battery, thereby adapting to mobile terminal batteries with different spacing between the positive and negative poles.

The first metal contact pin 122 and the third metal contact pin 222 are negative metal contact pins, the second metal contact pin 123 and the fourth metal contact pin 223 are positive metal contact pins, and the positive and negative metal contact pins are connected to the mobile terminal respectively. The positive and negative terminals of the battery are in contact. The metal contact pins with the same polarity on the clamping devices on the front and back are connected to the charging and discharging circuit after being connected in parallel through wires, that is, the positive metal contact pins of the first clamping device and the positive metal contact pins of the second clamping device are the same. Connect to the same node on the charging and discharging circuit through a wire, the negative metal contact pin of the first clamping device and the negative metal contact pin of the second clamping device are connected to the same node on the charging and discharging circuit through a wire, and the positive metal contact pin is connected to the same node on the charging and discharging circuit. The negative metal contact pin is connected to a different node on the charging and discharging circuit.

Therefore, for lithium batteries with different specifications and different distances between positive and negative electrodes, the use of this type of clamping device can solve the problem of effective access to mobile terminal batteries.

(2) Charge and discharge circuit.

The charging and discharging circuit includes an input port, a 3.7V output port, a 5V output port, a charging module, a power supply module, a battery power detection display module and a control module. Specifically, the module composition and connection schematic diagram of the charging and discharging circuit is shown in FIG. 7 .

The charging module includes a protection circuit to prevent battery overcharging and a charging management circuit that can control the charging process. The charging module is directly connected to the 5V input Micro USB socket through the input port. When the 5V input Micro USB socket has a 5V voltage input, the charging module converts the 5V voltage of the input port into a 4.2V battery charging voltage for the mobile device fixed on the clamping device. The terminal battery is charged, and when the mobile terminal battery is fully charged, the charging module will automatically power off.

The power supply module contains a protection circuit to prevent battery over-discharge. The power supply module is connected to the output 3.7V USB A socket and the output 5V USB A socket through the 3.7V output port and the 5V output port respectively. When the battery voltage of the mobile terminal fixed on the holding device is greater than 3.5V, the power supply module is turned on, and the output 3.7V USB A socket and the output 5V USB A socket corresponding to the two output ports can output normally; when fixed on the holding device When the battery voltage of the mobile terminal on the mobile terminal is less than 3.5V, the power supply module is turned off, and the output voltage of the USB A socket corresponding to the two output ports is zero.

The battery power detection and display module is respectively connected with the first metal contact pin 122, the second metal contact pin 123, the third metal contact pin 222, the fourth metal contact pin 223 and the LED power indicator 5 for detecting the The battery power of the mobile terminal is displayed through the LED power indicator.

The control module includes a monitoring protection circuit and a control circuit. The control module is also connected to the output 3.7V USB A socket, the output 5V USB A socket, and the 5V input Micro USB socket through the 3.7V output port, 5V output port, and input port respectively. When the control module detects that the output 3.7V USB A socket or the output 5V USB A socket is connected to a 3.7V or 5V device, the control circuit will automatically wake up the mobile power supply and supply power to the outside; when it detects that the input terminal has a 5V input voltage, the control circuit will Automatically wake up the mobile power supply to charge the battery of the mobile terminal on the holding device; when one of the following conditions is detected, the monitoring and protection circuit automatically turns off the mobile power supply and makes it enter a dormant state: the input port has overvoltage input or overcurrent input , 3.7V output port or/and 5V output port has overvoltage output or overcurrent output, and the power supply module has no output for more than 5s.

In addition to the above-mentioned safety guarantee of the charging and discharging circuit, since the rechargeable battery of the current mobile terminal has its own protection circuit, it can effectively prevent the harm caused by overcharging, over-discharging, and short circuit of positive and negative poles. Thus, the safety of the utility model is double guaranteed, one is the safety guarantee from the charging and discharging circuit, and the other is the safety guarantee from the protection circuit of the battery itself.

(3) Output 5V USB A socket and output 3.7V USB A socket.

The mobile power supply based on the idle mobile terminal battery is equipped with two USB A socket output ports, namely the output 5V USB A socket and the output 3.7V USB A socket, which are directly connected to the power supply module of the charge and discharge circuit through the output port of the charge and discharge circuit It can only output voltage when the power supply module is turned on.

Since most of the current electronic devices contain USB ports, the use of USB A sockets as output terminals can meet the power requirements of most 5V and 3.7V electronic devices. For 5V and 3.7V electronic devices that do not contain USB ports, only Add a USB interface converter to convert the USB interface of the utility model into a corresponding interface to supply power.

(4) 5V input Micro USB socket.

The mobile power supply based on the idle mobile terminal battery is equipped with a 5V input Micro USB socket, which is directly connected to the charging module of the charging and discharging circuit through the input port of the charging and discharging circuit. The 5V USB power adapter is connected to the 5V input Micro USB socket through the USB data cable to provide 5V input voltage for the charging module of the charging and discharging circuit.

Because the current Android mobile terminal power adapter outputs 5V voltage, and the USB data line is used to charge the mobile terminal, the utility model can be charged by using the existing Android mobile terminal power adapter without additional charging equipment.

(5) LED power indicator light.

The LED power indicator includes four LED lamp beads, and the working status of the four LED lamp beads is used to describe the battery power of the mobile terminal. When the device involved in the utility model supplies power to the outside, each LED light represents 25% of the power, and four LED lights represent four power levels of 25%, 50%, 75%, and 100%. That is: the first LED light flashes, the other LED lights are off, indicating that the power is 0-25%; the first LED light is always on, the second LED light is flashing, and the other LED lights are off, indicating that the power is 25%-50% ;The first two LED lights are always on, the third LED light is flashing, and the fourth LED light is off, indicating that the power is 50%-75%; the first three LED lights are always on, and the fourth LED light is flashing, indicating that the power is ; 75%-100%; the four lights are always on, indicating that the power is 100%.

In summary, the utility model uses mobile terminal equipment batteries such as mobile phones as batteries, and uses a clamping device with a sliding handle to position the mobile terminal batteries, which can realize the recycling of mobile terminal equipment batteries such as idle mobile phone batteries. The service life of the battery is extended to the greatest extent within the lifespan, so as to realize the best use of everything.

The utility model can output two kinds of voltages of 5V and 3.7V, so as to meet the electricity demand of different electronic equipment. Common 5V electronic devices include: mobile phones, tablet computers, mp4, digital cameras, laptop radiators, etc.; common 3.7V devices include: lithium battery energy-saving lamps, LED lights, USB fans, remote control toys, LED soft light strips, etc.

The multifunctional mobile power supply disclosed by the utility model can be used as a universal charger to charge batteries of mobile terminal equipment such as mobile phones. Put the battery into the clamping device and fix it, use the USB data cable to connect the utility model with the 5V power adapter, then the battery can be charged, and the battery can be taken out after it is fully charged. Compared with mobile power sources (also known as charging treasures) on the market, since the utility model uses mobile terminal equipment batteries such as mobile phone lithium batteries as batteries, these batteries have their own protection circuits, and the protection circuit of the utility model , forming double protection, while most of the batteries of mobile charging power sources currently on the market do not have their own protection circuits, and only rely on the internal circuit protection circuit of the mobile power supply to achieve safety protection. Therefore, compared with mobile phone mobile power supplies, the utility model is more Safety. The current mobile charging power supply on the market adopts built-in battery technology, and when the battery is damaged, the entire mobile power supply is also declared scrapped. The battery of the utility model can be disassembled at any time. When the battery is damaged, other batteries can be easily replaced, so it is relatively Therefore, the utility model has a high degree of recyclability.

The above-mentioned embodiment is a preferred implementation mode of the present utility model, but the implementation mode of the present utility model is not limited by the above-mentioned embodiment, and any other changes, modifications and substitutions made without departing from the spirit and principle of the present utility model , combination, and simplification, all should be equivalent replacement methods, and are all included in the protection scope of the present utility model.

Claims (8)

1. A multifunctional mobile power supply based on a mobile terminal battery, characterized in that it includes: a second clamping device (2) and a first clamping device (1) positioned on the front and back sides of the multifunctional mobile power supply, located at The charging and discharging circuit inside the multifunctional mobile power supply is located at the output 5V USB A socket (31), output 3.7V USB A socket (32) and 5V input Micro USB socket (4) on the upper side of the multifunctional mobile power supply; The first clamping device and the second clamping device respectively comprise a sliding end (11) of the first clamping device, a non-slidable end (12) of the first clamping device and a sliding end (21) of the second clamping device, a second 2. The non-slidable end (22) of the clamping device. The sliding end and the non-slidable end of the same clamping device cooperate with each other to fix mobile terminal batteries of different sizes; The charging and discharging circuit is used to control the charging and discharging process of the mobile terminal battery fixed on the above-mentioned clamping device; The output 5V USB A socket and the output 3.7V USB A socket are connected to the charging and discharging circuit, and are used for the USB output ports of the 5V and 3.7V DC power supply voltages of the multifunctional mobile power supply; The 5V input Micro USB socket is connected to the charging and discharging circuit, and is used for the USB input port of the 5V DC charging voltage of the multifunctional mobile power supply. 2. a kind of multifunctional mobile power supply based on mobile terminal battery according to claim 1, is characterized in that, The multifunctional mobile power supply also includes an LED power indicator light (5) on its upper side, and the LED power indicator light includes four LED lamp beads connected with the charging and discharging circuit for displaying The battery charge of the mobile terminal on the holder and the second holder. 3. A multifunctional mobile power supply based on a mobile terminal battery according to claim 2, wherein the charging and discharging circuit includes an input port, a 3.7V output port, a 5V output port, a charging module, a power supply module, a battery power detection display module and control module, Wherein, the charging module is connected to the 5V input Micro USB socket through the input port, and when the 5V input Micro USB socket has a 5V voltage input, the charging module converts the 5V voltage of the input port into a 4.2V battery Charging the battery of the mobile terminal fixed on the first or second holding device after charging the voltage; The power supply module is respectively connected to the output 3.7V USB A socket and the output 5V USB A socket through the 3.7V output port and the 5V output port, when fixed on the first or second clamping When the battery voltage of the mobile terminal on the device is greater than 3.5V, the power supply module is turned on, and both the output 3.7V USB A socket and the output 5V USB A socket can supply power and output normally. When fixed on the first or second clamping device When the mobile terminal battery voltages on the battery are all less than 3.5V, the power supply module is turned off, and the output voltage of the output 3.7V USB A socket and the output 5V USB A socket is zero; The battery power detection and display module is used to detect the battery power of the mobile terminal on the first or second clamping device and display it through the LED power indicator connected to it; The control module is connected to the output 3.7V USB A socket, the output 5V USB A socket and the 5V input MicroUSB socket through the 3.7V output port, the 5V output port, and the input port respectively. The control module includes a monitoring protection circuit and a control circuit. When the control module detects that the output 3.7V USB A socket or the output 5V USB A socket is externally connected with a 3.7V or 5V device, the control circuit automatically switches the The multifunctional mobile power supply wakes up and supplies power to the outside. When it is detected that the 5V input Micro USB socket has a 5V input voltage, the control circuit automatically wakes up the multifunctional mobile power supply, and the first or second clamping The mobile terminal battery on the device is charged; when it is detected that the input port has overvoltage input or overcurrent input, the 3.7V output port or the 5V output port has overvoltage output or overcurrent output, or the power supply If the module has no output beyond the first specified time, the monitoring and protection circuit will automatically shut down the multifunctional mobile power supply and make it enter a dormant state. 4. a kind of multifunctional mobile power supply based on mobile terminal battery according to claim 1, is characterized in that, The non-slidable end (12) of the first clamping device is provided with a first chute (121), and two first metal contact pins (122) and The second metal contact pin (123), two first sliding handles (124) and second sliding handles (125) that can move along the sliding groove are arranged in the first sliding groove, and the first metal contact pin ( 122) is connected with the first sliding handle (124), the second metal contact pin (123) is connected with the second sliding handle (125), and the distance between the above two metal contact pins is set at The sliding handle in the first chute is adjusted. 5. a kind of multifunctional mobile power supply based on mobile terminal battery according to claim 1, is characterized in that, The non-slidable end (22) of the second clamping device is provided with a second chute (221), and two third metal contact pins (222) and For the fourth metal contact pin (223), two third sliding handles (224) and fourth sliding handles (225) that can move along the sliding groove are arranged in the second chute, and the third metal contact pin ( 222) is connected with the third sliding handle (224), the fourth metal contact pin (223) is connected with the fourth sliding handle (225), and the distance between the above two metal contact pins is set at The sliding handle in the second chute is adjusted. 6. a kind of multifunctional mobile power supply based on mobile terminal battery according to claim 3, is characterized in that, The first specified time is 5 seconds. 7. A kind of multifunctional mobile power supply based on mobile terminal battery according to claim 5, characterized in that: The first metal contact pin (122) is connected to the same node on the internal circuit after being connected to the third metal contact pin (222), and the second metal contact pin (123) is connected to the fourth metal contact pin (123). After the contact pins (223) are connected, they are connected to another node on the internal circuit; At the same time, the first metal contact pin (122) and the third metal contact pin (222) are used to contact with the negative pole of the battery, and the second metal contact pin (123) and the fourth metal contact pin (223) ) is used to contact the positive pole of the battery. 8. A multifunctional mobile power supply based on a mobile terminal battery according to any one of claims 1 to 7, wherein the mobile terminal battery is a rechargeable battery made of nickel cadmium, nickel metal hydride, lithium ion or lithium polymer. Battery.