CN205595864U - Cell -phone charging circuit , cell -phone - Google Patents

Abstract

The utility model provides a mobile phone charging circuit and a mobile phone that are easy to use, convenient and easy to implement; the mobile phone charging circuit includes: a correspondingly connected charging interface, a charging circuit, a battery, a main board power supply access port, and also includes a selection circuit. The choice of one of the selection circuits provides power to the mainboard power access port through the charging interface, or supplies power to the mainboard power access port through the battery; the mobile phone in this design is provided with the above-mentioned The mobile phone charging circuit; through this design in the application, the startup time can be greatly saved, and it is convenient for users to use.

Description

Mobile phone charging circuit, mobile phone

technical field

The utility model relates to the technical field of mobile phones, in particular to a charging circuit for a mobile phone and a mobile phone.

Background technique

With the advancement and development of science and technology, the current smart phone has been widely promoted, and almost everyone has a smart phone in their hands. In the use of smart phones, their intelligence has brought great convenience to people, but There is a great shortcoming in current smart phones, that is, the battery life of smart phones is short and requires repeated charging, that is, it needs to be charged at least once a day, so as to meet the user's requirements, and for some smart phones In other words, the service time of its battery is even shorter, and even needs to be charged more than twice a day, and when the battery power in the mobile phone is used up, it must be charged for a certain period of time before it can be turned on In this case, the power-on time of the smart phone is greatly extended, which is not conducive to the user's use; moreover, when the smart phone is charged at present, it can also be used while charging, and this situation has huge advantages. potential safety hazards, such as the explosion of mobile phones, so in view of the above problems, it is indeed necessary to solve the above problems.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies of the prior art, adapt to the actual needs, and provide a mobile phone charging circuit and a mobile phone that are easy to use, convenient and easy to implement.

In order to realize the purpose of the utility model, the technical scheme adopted in the utility model is:

Design a mobile phone charging circuit, which includes a charging interface for connecting to a power adapter; a charging circuit, connected to the charging interface; a battery, connected to the charging circuit, and stores electric energy in the battery through the charging circuit; a mainboard power access port , as the input terminal of the power supply, used to supply power to the main board; further, the mobile phone charging circuit of this design also includes: an optional selection circuit, the optional one selection circuit has two input terminals and one output terminal, and the optional one The first input terminal S1 of the selection circuit is connected to the charging interface, the second input terminal S2 of the alternative selection circuit is connected to the output terminal of the battery, and the output terminal N of the alternative selection circuit is connected to the mainboard power input port. The one-choice selection circuit selects one to supply power to the mainboard power supply port through the charging interface, or to supply power to the mainboard power supply port through the battery.

Preferably, the alternative selection circuit is connected to the charging interface through a rectification circuit.

Preferably, a protection circuit is further included, the alternative selection circuit is connected to the charging interface through a protection circuit, and the protection circuit includes a capacitor.

Preferably, a micro battery is also included, and the micro battery is connected between the output terminal N of the alternative selection circuit and the power input port of the main board.

Preferably, the alternative selection circuit includes a manual toggle switch.

Alternatively, the alternative selection circuit includes a selector K, the first input terminal S1 is connected to the "0" input terminal of the selector K, and the second input terminal S2 is connected to the "1" input terminal of the selector K. "The input terminal is connected, and the output terminal N is connected with the output terminal of the selector K;

A comparator T is also included, the non-inverting input terminal of the comparator T is connected to the first input terminal S1, and the inverting input terminal of the comparator T is grounded;

It also includes a triode Q, the collector of the triode Q is grounded, the base is connected to the output terminal of the comparator T, and the emitter of the triode Q is connected to the selection control terminal of the selector K.

Further, the alternative selection circuit also includes a current limiting resistor R connected between the non-inverting input terminal of the comparator T and the emitter of the triode Q; it also includes an overvoltage protection diode D, the overvoltage protection diode The cathode of D is connected to the first input terminal S1, and the anode thereof is grounded; the selector includes a gate circuit or an alternative data selector.

Further, this design also includes a backup battery, a second charging circuit connected to the input end of the backup battery for charging the backup battery, the input end of the second charging circuit is connected to the charging interface, The output end of the backup battery is connected to the first input end S1 of the alternative selection circuit. In this solution, the alternative selection circuit includes a selector K, the first input terminal S1 is connected to the "0" input terminal of the selector K, and the second input terminal S2 is connected to the "0" input terminal of the selector K. The "1" input terminal is connected, and the output terminal N is connected with the output terminal of the selector K; a comparator T is also included, the non-inverting input terminal of the comparator T is connected with the first input terminal S1, and the inverting terminal of the comparator T The phase input terminal is grounded; it also includes a triode Q, the collector of the triode Q is grounded, the base is connected to the output terminal of the comparator T, and the emitter of the triode Q is connected to the selection control terminal of the selector K. In this solution, the above-mentioned first input terminal S1 is connected to the output terminal of the second charging circuit, the second input terminal S2 is connected to the output terminal of the battery, and the output terminal of the backup battery is connected to the selected The "0" input terminal of the selector K is connected, and at the same time, a reverse blocking diode D1 is connected in series at the front end of the connection point between the backup battery and the "0" input terminal of the selector K.

Further, in this solution, the alternative selection circuit also includes a current-limiting resistor R connected between the non-inverting input terminal of the comparator T and the emitter of the transistor Q; it also includes an overvoltage protection diode D, The cathode of the overvoltage protection diode D is connected to the first input terminal S1, and the anode thereof is grounded; the selector includes a gate circuit or a data selector for choosing between two.

Further, this design also provides a mobile phone, which includes a main board and an outer protective case. At the same time, this design is also provided with the above-mentioned mobile phone charging circuit in the mobile phone, and the main board is charged by the mobile phone charging circuit. For power supply, the manual toggle switch is arranged on the outer protective shell.

Preferably, the manual toggle switch is arranged on the left side wall, the right side wall, the upper end side wall or the lower end side wall of the outer protective shell.

The beneficial effects of the utility model are:

This design has the following advantages in application:

1. In the application of the charging circuit of this design, the electric energy of the battery "only enters and exits" during the charging process, which can speed up the charging speed and greatly save the power-on time of the mobile phone.

2. In the application of this design, after the charging interface is connected to the external power supply, it can be used to start the mobile phone directly through the power supply of the charging interface. There is no need to go through the battery in the middle, which can speed up the process of starting the mobile phone, and it will not be necessary to charge the battery first. Boot-up impacts upon boot-up;

3. The safety performance of the mobile phone of this design is high, avoiding the hidden danger of explosion caused by the battery in the existing mobile phone being charged while being used.

4. The backup battery of this design can provide temporary power supply for the mobile phone, even if the mobile phone is not connected to the mobile phone charger, the mobile phone of this design can also be used.

To sum up, compared with the mobile phones in the prior art, this design is novel in design, safe and easy to implement, and can be widely popularized and used on current smart phones.

Description of drawings

Fig. 1 is one of schematic diagrams of mobile phone charging circuit structure of the present utility model;

Fig. 2 is the second schematic diagram of the mobile phone charging circuit structure of the present utility model;

Fig. 3 is the third schematic diagram of the mobile phone charging circuit structure of the present invention;

Fig. 4 is the four schematic diagrams of mobile phone charging circuit structure of the present utility model;

Fig. 5 is the fifth schematic diagram of the mobile phone charging circuit structure of the present utility model;

Fig. 6 is a schematic diagram of a selection circuit principle in the utility model;

Fig. 7 is a schematic diagram of the circuit connection after the alternative selection circuit in Fig. 6 is applied in Fig. 1;

Fig. 8 is a schematic diagram of the circuit connection after the alternative selection circuit in Fig. 6 is applied in Fig. 2;

Fig. 9 is a schematic diagram of the circuit connection after the alternative selection circuit in Fig. 6 is applied in Fig. 3;

Fig. 10 is a schematic diagram of the circuit connection after the alternative selection circuit in Fig. 6 is applied in Fig. 4;

Fig. 11 is a schematic diagram of the circuit connection after the alternative selection circuit in Fig. 6 is applied in Fig. 5;

Fig. 12 is the sixth schematic diagram of the mobile phone charging circuit structure of the present utility model;

Fig. 13 is a schematic diagram of the seventh structure of the mobile phone charging circuit of the present invention.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Embodiment 1: A mobile phone charging circuit, see Figure 1; it includes a charging interface for connecting to a power adapter; a charging circuit, connected to the charging interface; a battery, connected to the charging circuit, and storing electric energy to the battery through the charging circuit middle; the mainboard power access port is used as the input terminal of the power supply for supplying power to the mainboard; furthermore, the mobile phone charging circuit of this design also includes: one selection circuit, the one selection circuit has two input terminals, one output terminal, and the first input terminal S1 of the alternative selection circuit is connected to the charging interface, the second input terminal S2 of the alternative selection circuit is connected to the output terminal of the battery, and the output terminal N of the alternative selection circuit is connected to the motherboard power supply connected to the access port, through the selection circuit to choose one of the options to supply power to the main board power access port through the charging interface, or to supply power to the main board power access port through the battery, that is, the charging interface is not connected to the charging port at ordinary times. When the charger (power adapter) is connected, select one of the selection circuits to select the battery to supply power to the motherboard; and when the charging interface is connected to the charger to charge the battery, select one of the selection circuits to select the charging interface to directly supply the mainboard power supply port, and At the same time, the power supply of the battery is cut off to prevent the battery from being in a state of deep charge and discharge, thereby protecting the battery and prolonging the service time of the battery.

Through the above design, the mobile phone charging circuit of this design can quickly charge the mobile phone in application, which can greatly save the starting time of the mobile phone. Compared with the mobile phone in the prior art, this design is novel in design and easy to implement. Widespread use on current smartphones.

Embodiment 2: Referring to FIG. 2 , the similarities with Embodiment 1 will not be repeated, and the difference is that the one-choice selection circuit in this design is connected to the charging interface through a rectification circuit.

Embodiment 3: can refer to Fig. 3, and the similarities with embodiment 1 or embodiment 2 will not be repeated, the difference is: the mobile phone charging circuit of this design also includes a protection circuit, and the described alternative selection circuit passes through the protection circuit. The circuit is connected to the charging interface. In this design, the protection circuit may include a capacitor or other forms of protection circuits.

Embodiment 4: Refer to Fig. 5, and the similarities with Embodiment 3 will not be repeated, and the difference is: this embodiment is also connected with a micro Battery, through the design of this micro-battery, when the battery is in normal use, that is, when the battery power is sufficient, its micro-battery has a small amount of power in memory, and when its battery power is insufficient, its micro-battery can Supply power to the main board in a short time to achieve continuous power supply for the main board; of course, at the same time when the micro battery is powering the main board, the optional circuit can be disconnected from the optional circuit, and the power supply is only provided by the micro battery Alternatively, the charging interface can be used to supply power to the mainboard power supply port, or the battery can be used to supply power to the mainboard power supply port.

Embodiment 5: Refer to FIG. 12 , and the similarities with Embodiment 4 will not be described again. The difference is that the micro-battery in this embodiment is connected in parallel between the selection circuit and the mainboard power access port. on the line.

Embodiment 6: Please refer to FIG. 6, the similarities with any of Embodiment 1 to Embodiment 5 will not be repeated, the difference is: in this embodiment, any of the above Embodiment 1 to Embodiment 4 The alternative circuit which includes:

A selector K, the first input terminal S1 is connected to the "0" input terminal of the selector K, the second input terminal S2 is connected to the "1" input terminal of the selector K, and the output terminal N is connected to the "0" input terminal of the selector K. The output terminal of the selector K is connected;

A comparator T, the non-inverting input terminal of the comparator T is connected to the first input terminal S1, and the inverting input terminal of the comparator T is grounded;

Transistor Q, the collector of the triode Q is grounded, the base is connected to the output terminal of the comparator T, and the emitter of the triode Q is connected to the selection control terminal of the selector K.

Further, in this embodiment, the alternative selection circuit further includes a current-limiting resistor R connected between the non-inverting input terminal of the comparator T and the emitter of the triode Q; and an overvoltage protection diode D , the cathode of the overvoltage protection diode D is connected to the first input terminal S1, and the anode thereof is grounded.

However, the selector in this embodiment includes a gate circuit or an alternative data selector.

Further, when the alternative selection circuit described in Embodiment 5 is specifically applied in Embodiment 1 to Embodiment 4, the circuit connection relationship of each part can be referred to in FIG. 7 , FIG. 8 , FIG. 9 , and FIG. 11 .

Through the one-choice selection circuit designed in this design, in the case of normal battery power supply, the comparator T does not work or outputs low level, the transistor Q is in the cut-off state, and the selection control terminal of the selector K has no signal input. At this time, the The "1" input terminal of the selector K is connected, the "0" input terminal is disconnected, and the power is supplied by the battery. When the charging interface is connected to the power adapter, the charging interface has a voltage input. At this time, the comparator T outputs a high voltage. level, then the triode Q is turned on, and the selection control terminal of the selector K has a signal input, at this time, the "1" input terminal of the selector K is disconnected, the "0" input terminal is connected, and the first input terminal S1 provides power Supply power to the motherboard power inlet port at the rear.

Embodiment 7: can refer to Fig. 4, and the similarities with embodiment 1 are no longer repeated, and the difference is: the mobile phone charging circuit of this design also includes a backup battery, is used for charging the backup battery, and is connected with the backup battery A second charging circuit connected to the input end of the battery, the input end of the second charging circuit is connected to the charging interface, the output end of the backup battery is connected to the first input end S1 of the alternative selection circuit, the above-mentioned The spare battery in the application can provide temporary power supply for the mobile phone, even when the mobile phone is not connected to the mobile phone charger, the mobile phone of this design can also be used.

Furthermore, this embodiment can also refer to Fig. 13. In this way, on the basis of the above, a micro battery is connected in parallel on the line between the selection circuit and the mainboard power supply port. Through the design of this micro battery, In the case of normal use of the battery, that is, when the battery power is sufficient, its micro-battery has a small amount of power stored in it, and when the battery power is insufficient, its micro-battery can provide power for the motherboard in a short time. Continuous power supply for the motherboard.

Embodiment 8: Refer to FIG. 10 , and the similarities with Embodiment 7 will not be repeated. The difference is that in this embodiment, the alternative selection circuit 100 described in Embodiment 6 above includes:

A selector K, the first input terminal S1 is connected to the "0" input terminal of the selector K, the second input terminal S2 is connected to the "1" input terminal of the selector K, and the output terminal N is connected to the "0" input terminal of the selector K. The output terminal of the selector K is connected;

A comparator T, the non-inverting input terminal of the comparator T is connected to the first input terminal S1, and the inverting input terminal of the comparator T is grounded;

Transistor Q, the collector of the triode Q is grounded, the base is connected to the output terminal of the comparator T, and the emitter of the triode Q is connected to the selection control terminal of the selector K;

The first input terminal S1 is connected to the output terminal of the second charging circuit, the second input terminal S2 is connected to the output terminal of the battery, and the output terminal of the backup battery is connected to the "0" input of the selector K end connection,

A reverse cut-off diode D1 is also connected in series at the front end of the connection point between the backup battery and the "0" input of the selector K.

Further, the above-mentioned alternative selection circuit also includes a current-limiting resistor R connected between the non-inverting input terminal of the comparator T and the emitter of the transistor Q; it also includes an overvoltage protection diode D, the overvoltage The cathode of the protection diode D is connected to the first input terminal S1, and the anode thereof is grounded; the selector includes a gate circuit or an alternative data selector.

Embodiment 9: The same as any of Embodiment 1 to Embodiment 4 and Embodiment 7 will not be repeated, the difference is that in this embodiment, the selection circuit includes a manual toggle switch, or It is the alternative selection circuit in this design that can adopt any selection circuit in the prior art that can realize the purpose of this design.

Embodiment 10: This embodiment provides a mobile phone, which includes a main board and an outer protective shell. At the same time, the design is also provided with a mobile phone charging circuit as described in any one of the above embodiments in the mobile phone, through which the mobile phone charging circuit supply power to the main board, and the manual toggle switch is set on the outer protective shell, specifically, the manual toggle switch is set on the left side wall, right side wall, On the upper side wall or the lower side wall.

Embodiment 10: This embodiment provides a mobile phone charging method, which includes the following steps to achieve:

(1) The main control circuit in the mobile phone judges whether the current battery power is lower than the threshold T;

(2) If the current battery power is higher than the threshold T, continue to be powered by the battery, otherwise, perform the next step;

(3) The main control circuit in the mobile phone controls the mobile phone to emit a prompt tone;

(4) The charging interface is connected to the power adapter. Select one of the selection circuits to cut off the connection between the battery and the mainboard power supply port, connect the connection between the charging interface and the mainboard power supply port, and connect the mainboard power supply through the charging interface. The input port supplies power, and at the same time, the battery is charged through the charging circuit;

Or, select one of the selection circuits to cut off the connection between the battery and the mainboard power supply port, connect the connection between the backup battery and the mainboard power supply port, and supply power to the mainboard power supply port through the spare battery.

Further, it also includes:

(5) The main control circuit in the mobile phone judges whether the power in the current battery is fully charged, or whether the power in the battery is higher than the threshold P;

(6) If the power in the battery is not fully charged, or the power in the battery is lower than the threshold P, continue to perform the above step (4);

(7) If the power in the battery is fully charged, or the power in the battery is higher than the threshold value P, and the charging interface is not connected to the power adapter, select one of the selection circuits to cut off the connection between the charging interface or the spare battery and the power supply port of the main board. Connecting, connecting the connection between the rechargeable battery and the mainboard power supply port, and supplying power to the mainboard power supply port through the battery;

If the electric quantity in the battery is fully charged, or the electric quantity in the battery is higher than the threshold value P, and the charging interface and the power adapter are still connected, choose one selection circuit to cut off the connection between the battery and the mainboard power inlet port, and keep the charging interface and the mainboard power supply port connected. The connection between the mainboard power supply ports supplies power to the mainboard power supply ports through the charging interface, and at the same time, the charging circuit stops charging the battery.

In this design, the above-mentioned threshold P and the threshold T may be the same or different.

The embodiments of the utility model disclosed are preferred embodiments, but are not limited thereto. Those skilled in the art can easily comprehend the spirit of the utility model according to the above-mentioned embodiments, and make different extensions and Change, but as long as it does not depart from the spirit of the utility model, it is all within the protection scope of the utility model.

Claims (10)

1. A mobile phone charging circuit, which includes: Charging interface, used to connect with the power adapter; The charging circuit is connected with the charging interface; A battery connected to the charging circuit, through which electric energy is stored in the battery; Mainboard power access port, as the input terminal of the power supply, used to supply power to the mainboard; It is characterized in that it also includes: An alternative selection circuit, the alternative selection circuit has two input terminals and one output terminal; The first input terminal S1 of the alternative selection circuit is connected to the charging interface, the second input terminal S2 of the alternative selection circuit is connected to the output terminal of the battery, and the output terminal N of the alternative selection circuit is connected to the mainboard power input port , through the alternative selection circuit to select one to supply power to the mainboard power supply port through the charging interface, or to supply power to the mainboard power supply port through the battery. 2. The mobile phone charging circuit according to claim 1, wherein the one-choice selection circuit is connected to the charging interface through a rectification circuit. 3 . The mobile phone charging circuit according to claim 1 , further comprising a protection circuit, the alternative selection circuit is connected to the charging interface through a protection circuit, and the protection circuit includes a capacitor. 4. The mobile phone charging circuit according to claim 1, characterized in that: it also includes a spare battery, a second charging circuit that is used to charge the spare battery and is connected to the input end of the spare battery, the second The input end of the charging circuit is connected to the charging interface, and the output end of the backup battery is connected to the first input end S1 of the alternative selection circuit. 5. The mobile phone charging circuit according to any one of claims 1-4, characterized in that: the one-choice selection circuit includes a manual toggle switch. 6. The mobile phone charging circuit according to any one of claims 1-3, characterized in that: said alternative selection circuit comprises: A selector K, the first input terminal S1 is connected to the "0" input terminal of the selector K, the second input terminal S2 is connected to the "1" input terminal of the selector K, and the output terminal N is connected to the "0" input terminal of the selector K. The output terminal of the selector K is connected; A comparator T, the non-inverting input terminal of the comparator T is connected to the first input terminal S1, and the inverting input terminal of the comparator T is grounded; Transistor Q, the collector of the triode Q is grounded, the base is connected to the output terminal of the comparator T, and the emitter of the triode Q is connected to the selection control terminal of the selector K. 7. The mobile phone charging circuit according to claim 6, wherein: the alternative selection circuit further comprises a current-limiting resistor R connected between the non-inverting input terminal of the comparator T and the emitter of the triode Q ; An overvoltage protection diode D is also included, the cathode of the overvoltage protection diode D is connected to the first input terminal S1, and the anode of the overvoltage protection diode D is grounded; The selector includes a gate circuit or an alternative data selector. 8. The mobile phone charging circuit according to claim 4, characterized in that: the one-choice selection circuit comprises: A selector K, the first input terminal S1 is connected to the "0" input terminal of the selector K, the second input terminal S2 is connected to the "1" input terminal of the selector K, and the output terminal N is connected to the "0" input terminal of the selector K. The output terminal of the selector K is connected; A comparator T, the non-inverting input terminal of the comparator T is connected to the first input terminal S1, and the inverting input terminal of the comparator T is grounded; Transistor Q, the collector of the triode Q is grounded, the base is connected to the output terminal of the comparator T, and the emitter of the triode Q is connected to the selection control terminal of the selector K; The first input terminal S1 is connected to the output terminal of the second charging circuit, the second input terminal S2 is connected to the output terminal of the battery, and the output terminal of the backup battery is connected to the "0" input of the selector K end connection, A reverse cut-off diode D1 is also connected in series at the front end of the connection point between the backup battery and the "0" input of the selector K. 9. The mobile phone charging circuit according to claim 8, characterized in that: the alternative selection circuit further comprises a current-limiting resistor R connected between the non-inverting input terminal of the comparator T and the emitter of the triode Q ; An overvoltage protection diode D is also included, the cathode of the overvoltage protection diode D is connected to the first input terminal S1, and the anode of the overvoltage protection diode D is grounded; The selector includes a gate circuit or an alternative data selector. 10. A mobile phone, comprising a main board and an outer protective case, characterized in that the mobile phone charging circuit according to claim 1 is arranged in the mobile phone, and the main board is powered by the mobile phone charging circuit.