CN109494822B

CN109494822B - Terminal equipment, charger, charging system and charging method

Info

Publication number: CN109494822B
Application number: CN201710822918.8A
Authority: CN
Inventors: 王欣
Original assignee: Xian Zhongxing New Software Co Ltd
Current assignee: Xian Zhongxing New Software Co Ltd
Priority date: 2017-09-13
Filing date: 2017-09-13
Publication date: 2024-05-24
Anticipated expiration: 2037-09-13
Also published as: CN109494822A; WO2019052386A1

Abstract

The embodiment of the invention discloses a terminal device, a charger, a charging system and a charging method. The terminal equipment in the embodiment of the invention comprises: the USB interface and the first change-over switch are used for being connected with a Universal Serial Bus (USB) plug of the charger in a matching way; the USB interface comprises a power pin, a ground pin, a first data pin and a second data pin; and the first change-over switch is used for shorting the first data pin of the USB interface with the power pin and shorting the second data pin with the grounding pin when the terminal equipment detects that the USB interface is connected with the preset charger. Therefore, the terminal equipment can be charged through the power pin and the first data pin of the USB interface, so that the maximum overcurrent capacity of charging current is improved to a great extent; the terminal equipment provided by the embodiment of the invention solves the problem that the quick charging scheme in the prior art is influenced by various factors and is difficult to improve the quick charging capability.

Description

Terminal equipment, charger, charging system and charging method

Technical Field

The present invention relates to the field of, but not limited to, computer technology, and in particular, to a terminal device, a charger, a charging system, and a charging method.

Background

With the development of computer technology, terminal devices (such as smartphones) are rapidly developed in hardware configuration, however, the cruising ability of the terminal devices becomes a short board in the industry, and is also an important technical index that needs to be improved at present.

Under the limitation of factors such as thickness, size, weight of terminal equipment, it is difficult to simply increase the battery capacity to improve the endurance thereof, and under the condition of determining the battery capacity, the application of a quick charging technology to shorten the charging time becomes an important way for improving the endurance. The fast charge scheme of the prior art generally has the following problems: firstly, in a quick charging scheme of a low-voltage high-current mode, a special universal serial bus (Universal Serial Bus, abbreviated as USB) connector, a special charger, a battery connector and a data line are required to be customized on a charging path, so that the effect of quick charging can be realized; in the second, high voltage low current mode fast charging scheme, a specific high voltage charger is required, and the current is limited by the overcurrent capability of the charging interface, typically, the maximum overcurrent capability of the power pin (VBUS) in the charging interface is 1.8 a (a), thus causing a problem of limited fast charging capability.

In summary, in the prior art, the charging method is limited by the hardware configuration on the charging path and by the maximum overcurrent capability of the charging interface, which results in the problem that the quick charging capability is limited greatly.

Disclosure of Invention

In order to solve the technical problems, the embodiment of the invention provides a terminal device, a charger, a charging system and a charging method, so as to solve the problem that a quick charging scheme in the prior art is affected by various factors and is difficult to improve the quick charging capability.

In a first aspect, the present invention provides a terminal device, including:

The USB interface and the first change-over switch are used for being connected with a Universal Serial Bus (USB) plug of the charger in a matching way;

the USB interface comprises a power pin, a ground pin, a first data pin and a second data pin;

and the first change-over switch is used for shorting the first data pin of the USB interface with the power pin and shorting the second data pin with the grounding pin when the terminal equipment detects that the USB interface is connected with the preset charger.

Preferably, the terminal device further includes: the charging management module is connected with the USB interface through the first change-over switch, and a power supply pin, a grounding pin, a first data pin and a second data pin of the charging management module are in one-to-one correspondence with the power supply pin, the grounding pin, the first data pin and the second data pin of the USB interface;

The charging management module is used for communicating with the preset charger through a first data pin and a second data pin of the USB interface, indicating a second change-over switch of the preset charger to disconnect the short circuit of the first data pin and the second data pin of the USB plug, and indicating a second change-over switch of the preset charger to short circuit the first data pin and the power pin of the USB plug, and indicating a second data pin and the grounding pin to short circuit.

Preferably, the charging management module is further configured to determine whether a first data pin in the USB plug is shorted with a second data pin when it is detected that the USB plug is inserted into the USB interface, and determine that the USB interface is connected with a charger when it is determined that the first data pin is shorted with the second data pin.

Preferably, the charging management module is further configured to perform a corresponding charging operation according to the detected voltages of the first data pin and the second data pin of the USB interface when the USB interface is connected to the charger.

Preferably, the charging management module performs a corresponding charging operation according to the detected voltage, including:

When the first data pin of the USB interface is detected to be at a high level and the second data pin is detected to be at a low level, the first change-over switch of the terminal equipment is instructed to short-circuit the first data pin of the USB interface with the power pin, the second data pin is short-circuited with the grounding pin, and the battery of the terminal equipment is charged through the power pin and the first data pin of the USB interface;

and when the first data pin of the USB interface is detected to be at a low level and the second data pin is detected to be at a high level, charging a battery of the terminal equipment through a power pin of the USB interface.

Preferably, the charging management module is further configured to charge the battery of the terminal device through the power pin of the USB interface when it is determined that the first data pin and the second data pin in the USB plug are not shorted.

In a second aspect, the present invention also provides a charger, comprising: the USB plug and the second change-over switch are used for being matched and connected with a Universal Serial Bus (USB) interface of the terminal equipment;

the USB plug comprises a power supply pin, a ground pin, a first data pin and a second data pin, wherein the first data pin is in short circuit with the second data pin;

And the second change-over switch is used for disconnecting the short circuit of the first data pin and the second data pin of the USB plug according to the indication of the terminal equipment when the USB plug is inserted into the USB interface of the terminal equipment, shorting the first data pin and the power pin of the USB plug, and shorting the second data pin and the grounding pin.

Preferably, the power pin, the ground pin, the first data pin and the second data pin of the USB plug are connected with the power pin, the ground pin, the first data pin and the second data pin of the USB interface in one-to-one correspondence;

the second change-over switch is further used for communicating with the terminal equipment through a first data pin and a second data pin of the USB plug;

the second change-over switch is further configured to, after disconnecting the short circuit between the first data pin and the second data pin of the USB plug, short circuit the first data pin and the power pin of the USB plug, and short circuit the second data pin and the ground pin, transmit a charging current to the USB interface of the terminal device through the power pin and the first data pin of the USB plug.

In a third aspect, the present invention also provides a charging system, including: the terminal device and the charger.

In a fourth aspect, the present invention also provides a charging method, including:

judging whether a charger connected with the terminal equipment is a preset charger or not;

when the charger is judged to be the preset charger, the short circuit of the first data pin and the second data pin of the USB plug in the preset charger is disconnected, the first data pin and the power pin of the USB plug are in short circuit, the second data pin and the grounding pin are in short circuit, the first data pin and the power pin of the USB interface in the terminal equipment are in short circuit, and the second data pin and the grounding pin are in short circuit.

Preferably, before the determining whether the charger connected to the terminal device is a preset charger, the method further includes:

judging whether a USB interface of the terminal equipment is connected with a charger or not;

and when the first data pin and the second data pin of the USB plug are detected to be short-circuited, determining that the terminal equipment is connected with the charger.

Preferably, the charging method further comprises:

And when the terminal equipment is connected with the charger, corresponding charging operation is executed according to the detected voltages of the first data pin and the second data pin of the USB interface.

Preferably, the performing a corresponding charging operation according to the detected voltage includes:

When the first data pin of the USB interface is detected to be at a high level and the second data pin is detected to be at a low level, determining that the charger is the preset charger, so that the battery of the terminal equipment is charged through the power pin and the first data pin of the USB interface;

When the first data pin of the USB interface is detected to be at a low level and the second data pin is detected to be at a high level, the charger is determined to be a common charger, so that the battery of the terminal equipment is charged through the power pin of the USB interface.

Preferably, the charging method further includes:

and when the first data pin and the second data pin of the USB plug are detected not to be short-circuited, charging the battery of the terminal equipment through the power pin of the USB interface.

In a fifth aspect, the present invention also provides a computer-readable storage medium storing computer-executable instructions that, when executed by a processor, perform the operations of:

According to the terminal equipment, the charger, the charging system and the charging method provided by the embodiment of the invention, the USB interface and the first change-over switch are configured for being connected with the USB plug of the charger in a matching way, when the terminal equipment detects that the USB interface is connected with the preset charger, the first data pin of the USB interface is in short circuit with the power pin, and the second data pin is in short circuit with the grounding pin, so that the terminal equipment can be charged through the power pin and the first data pin of the USB interface, and the maximum overcurrent capacity of charging current is greatly improved; the terminal equipment provided by the embodiment of the invention solves the problem that the quick charging scheme in the prior art is influenced by various factors and is difficult to improve the quick charging capability.

Drawings

The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate and do not limit the application.

Fig. 1 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another terminal device according to an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of still another terminal device 10 according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a charger according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of another charger according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a charging system according to an embodiment of the present invention;

fig. 7 is a schematic flow chart of a charging method according to an embodiment of the present invention;

fig. 8 is a flow chart of another charging method according to an embodiment of the invention.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail hereinafter with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be arbitrarily combined with each other.

The steps illustrated in the flowchart of the figures may be performed in a computer system, such as a set of computer-executable instructions. Also, while a logical order is depicted in the flowchart, in some cases, the steps depicted or described may be performed in a different order than presented herein.

Before describing the fast charging mode provided by the embodiment of the invention, several indexes affecting the charging speed are introduced briefly, and the charging power satisfies the following formula:

Power (P) =voltage (V) ×current (I);

According to the above formula, under the condition that the battery power is certain, the power level marks the charging speed, so the following two directions are adopted for improving the charging speed:

first, low voltage high current charging mode: when the voltage is constant, the current is increased, and the shunt can be performed by using a parallel circuit, and at a constant voltage, the smaller the voltage shared by each circuit after parallel shunt is, the same processing is performed in the terminal device, and the smaller the voltage born by each circuit is. The low-voltage high-current charging scheme can realize the effect of quick charging by customizing a special multi-pin (pin) number USB connector, a special charger, a battery connector and a data line on the whole charging path.

It can be seen that the low-voltage high-current charging mode has higher requirements on electronic components such as a charger, terminal equipment, a charging data line and the like, and the overall design and generation cost is increased.

Second, high voltage low current charging mode: in QC2.0 fast charge protocol, the mobile phone communicates with the charger through D+ and D-on USB, and outputs corresponding voltage through the specified protocol charger, so that arbitrary voltage of 3.6V-20V in 5V, 9V, 12V and 20V in QC3.0 fast charge protocol can be supported, the voltage is 200 millivolts (mV), limited charging current can be completed, the minimum voltage is input by the charger, the positive pole (VCHG) of a charging circuit is close to the power supply Voltage (VBAT) as much as possible, the loss of switching conversion is reduced, the charging efficiency is improved, and the heating problem is improved.

In addition, in the PE2.0 fast-charging protocol, VBUS current is regulated through PE+ as a handshake instruction.

The above-mentioned quick charging schemes all require a specific high-voltage charger, the increase of voltage causes a heating problem, and the current is limited by the overcurrent capacity of the charging interface, typically, the maximum overcurrent capacity of VBUS is 1.8A.

Because the charging method is limited by the hardware configuration and the maximum overcurrent capability of the charging interface in the prior art, it is currently highly desirable to provide a charging scheme that can improve the rapid charging capability.

The following detailed description of the technical solution of the present invention is provided by specific embodiments, where the terminal device in each of the following embodiments of the present invention is a terminal device that is charged through a USB interface, for example, a mobile terminal such as a smart phone, a tablet pc, a Personal Digital Assistant (PDA) and the like, and accordingly, the charger in the embodiments of the present invention is configured with a USB plug adapted to the USB interface. The following specific embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.

Fig. 1 is a schematic structural diagram of a terminal device according to an embodiment of the present invention. In the case where the terminal device provided in the present embodiment is suitable for performing fast charging, the terminal device 10 may include: a USB interface 11 for mating connection with a USB plug of a charger, and a first switch 12.

Wherein, the USB interface 11 comprises a power pin, a ground pin, a first data pin and a second data pin; the one-to-one correspondence of the power pin, the ground pin, the first data pin, and the second data pin in the terminal device 10 shown in fig. 1 is denoted VBUS, GND, D-and d+.

It should be noted that, in the embodiment of the present invention, the USB interface 11 and the USB plug are USB having a first data pin (D-) and a second data pin (d+), for example, may be a Micro USB interface or plug, or may be a USB (i.e. USB-C, also referred to as Type-C) interface or plug with a model number C, and it is satisfied that the USB interface and the USB plug may be matched for use.

In the current charging mode, a first data pin (D-) and a second data pin (D+) of a USB plug matched with a USB interface are in a short circuit relationship at the charger side, so that the first data pin (D-) and the second data pin (D+) are in an idle state in the charging process; when in charging, the charger only transmits charging current to the USB interface of the terminal equipment through a power supply pin (VBUS) of the USB plug, and the maximum overcurrent capacity of the VBUS is 1.8A.

Taking the terminal equipment as a smart phone for example, the default of the smart phone is a charging voltage of 5V, so that under the condition of determining the charging voltage, the charging current is limited by the maximum overcurrent capacity of 1.8A, which makes the rapid charging capacity in the prior art limited greatly, and the charging speed is difficult to improve.

The first switch 12 is configured to short-circuit the first data pin (D-) of the USB interface 11 with the power pin (VBUS) and short-circuit the second data pin (d+) with the ground pin (GND) when the terminal device 10 detects that the USB interface 11 is connected with the preset charger.

In the embodiment of the present invention, the first switch 12 may be a double-pole double-throw switch, where one switch is used to switch the connection relationship of the first data Pin (D-) and the other switch is used to switch the connection relationship of the second data Pin (d+), after the USB interface 11 of the terminal device 10 is connected to the charger and the enumeration identification of the charger is completed through the first switch 12 set in the terminal device 10, specifically when the terminal device 10 detects that the USB interface 11 is connected to the preset charger, the first data Pin (D-) of the USB interface 11 is shorted to the power Pin (VBUS), the second data Pin (d+) is shorted to the ground Pin (GND), at this time, the power and the ground wires are both allocated with 2 pins (Pin), that is, the power is allocated to the power Pin (VBUS) and the first data Pin (d+), the ground wire is allocated to the ground Pin (GND), and the flow direction of current flows from the power Pin (VBUS) back to the ground Pin (GND), so that an excessive current on the USB interface 11 can be realized. According to the embodiment of the invention, through the switching function of the first switch 12, the charging current is shared on the first data pin (D-) and the second data pin (D+) in the charging process, so that the maximum overcurrent capacity of the USB interface 11 can be improved.

In practical application, in the charging process of the prior art, terminal equipment is charged through a power supply pin (VBUS) of a USB interface, and the maximum overcurrent capacity of charging current is limited to be 1.8A; according to the embodiment of the invention, the charging current is shared on the first data pin (D-) and the second data pin (D+) through the switching function of the first switch 12, and the terminal equipment 10 is charged through the power pin (VBUS) and the first data pin (D-) of the USB interface 11 in the charging process, so that the maximum overcurrent capacity of the charging current can be doubled, namely, the maximum overcurrent capacity can be improved to 3.6A, and therefore, the charging speed can be improved to a great extent, namely, the quick charging capacity is improved.

It should be noted that, the above-mentioned preset charger is a charger specifically designed for the terminal device 10 provided in the embodiment of the present invention, and the preset charger has a structure (i.e., a switch) corresponding to the terminal device 10, so that when the preset charger charges the terminal device 10, a quick charging effect can be achieved.

According to the terminal equipment provided by the embodiment of the invention, the USB interface and the first change-over switch are configured for being matched and connected with the USB plug of the charger, when the terminal equipment detects that the USB interface is connected with the preset charger, the first data pin of the USB interface is in short circuit with the power pin, and the second data pin is in short circuit with the grounding pin, so that the terminal equipment can be charged through the power pin and the first data pin of the USB interface, and the maximum overcurrent capacity of charging current is greatly improved; the terminal equipment provided by the embodiment of the invention solves the problem that the quick charging scheme in the prior art is influenced by various factors and is difficult to improve the quick charging capability.

Optionally, fig. 2 is a schematic structural diagram of another terminal device according to an embodiment of the present invention. On the basis of the above embodiment, the terminal device 10 provided in the embodiment of the present invention may further include:

The charging management module 13 is connected to the USB interface 11 through the first switch 12, and the power pin (VBUS), the ground pin (GND), the first data pin (D-) and the second data pin (d+) of the charging management module 13 are connected to the power pin (VBUS), the ground pin (GND), the first data pin (D-) and the second data pin (d+) of the USB interface 11 in one-to-one correspondence.

The charging management module 13 in the embodiment of the present invention is, for example, a charging chip, where the charging management module 13 may be disposed inside or outside the processor of the terminal device 10, and the charging management module 13 may implement control of the preset charger-side switch through the connection relationship with each pin in the USB interface 11. In practical application, the charging management module 13 is configured to communicate with the preset charger through the first data pin (D-) and the second data pin (d+) of the USB interface 11, delay for 2 seconds(s) after detecting that the preset charger is normally connected to the terminal device 10, and then instruct the second switch of the preset charger to disconnect the short circuit of the first data pin and the second data pin (d+) of the USB plug, short the first data pin (D-) of the USB plug to the power pin (VBUS), and short the second data pin (d+) to the ground pin (GND). It should be noted that the second switch in the preset charger may also be a double pole double throw switch, where one switch is used to switch the connection relationship of the first data pin (D-) and the other switch is used to switch the connection relationship of the second data pin (d+).

In the USB plug of the charger in the prior art, the first data pin (D-) and the second data pin (D+) are in a short circuit relationship, and in the charging process, the first data pin (D-) and the second data pin (D+) are in an idle state, namely, do not share the charging current. Correspondingly to the first switch 12 in the terminal device 10 shown in fig. 1, the terminal device 10 can not only short the first data pin (D-) of the local USB interface 11 to the power pin (VBUS) and the second data pin (d+) to the ground pin (GND) through the first switch 12; accordingly, the charging management module 13 may also instruct the second switch on the preset charger side to perform a corresponding switching operation, so as to share the charging current on the first data pin (D-) and the second data pin (d+) in the charging process, thereby realizing the requirement of improving the maximum overcurrent capability of the USB interface 11.

Alternatively, in practical application, when the USB interface 11 of the terminal device 10 is plugged into a USB plug, the USB plug may be a plug of a charger, or may be a plug of another device, for example, a plug of a data line connected through a computer.

In one implementation manner of the embodiment of the present invention, the charging management module 13 is further configured to determine, when it is detected that a USB plug is inserted into the USB interface 11, whether a first data pin (D-) in the USB plug is shorted with a second data pin (d+) and determine that the USB interface 11 is connected with a charger when it is determined that the first data pin is shorted with the second data pin (d+).

As described above, in the present design of the charger, the first data pin (D-) in the USB plug is shorted to the second data pin (d+) and the charge management module 13 of the terminal device 10 can determine that the device connected to the USB interface 11 is the charger or other devices through the determination of the connection relationship. The charger is in an alternating Current (ALTERNATING CURRENT, abbreviated as AC) charging mode, and if the USB plug is a plug of a data line connected through a computer, a Direct Current (DC) charging mode is adopted to charge the terminal device 10. Specifically, the conditions for judging that the USB plug connected to the USB interface 11 is a charger plug are: a short circuit between a first data pin (D-) and a second data pin (D+) in the USB plug is detected.

In another implementation manner of the embodiment of the present invention, the charging management module 13 is further configured to, when it is determined that the first data pin (D-) and the second data pin (d+) in the USB plug are not shorted, indicate that the USB interface 11 of the terminal device 10 is connected to a non-AC charger, for example, through a data line, and connect to a computer, and at this time, charge the battery 14 of the terminal device 10 through the power pin (VBUS) of the USB interface 11, where the current in the charging process is 500mA.

Alternatively, in the embodiment of the present invention, in the case where the charging management module 13 has determined that the USB interface 11 is connected to the charger, the charger may be a common charger in the prior art, or may be a charger for performing quick charging, that is, a preset charger, used in conjunction with the terminal device 10 in the embodiment of the present invention, and therefore, a corresponding charging operation needs to be performed according to the type of the charger.

The charging management module 13 in the embodiment of the present invention is further configured to perform a corresponding charging operation according to the detected voltages of the first data pin (D-) and the second data pin (d+) of the USB interface 11 when the USB interface 11 is connected to the charger.

Further, in the embodiment of the present invention, the implementation manner of the charging management module 13 to perform the corresponding charging operation according to the detected voltage may include:

When the first data pin (D-) of the USB interface 11 is detected to be at a high level and the second data pin (d+) is detected to be at a low level, the first switch 12 of the terminal device 10 is instructed to short the first data pin (D-) of the USB interface 11 with the power pin (VBUS), and after the second data pin (D-) is short-circuited with the ground pin (GND), the battery 14 of the terminal device 10 is charged through the power pin (VBUS) and the first data pin (D-) of the USB interface 11;

When the first data pin (D-) of the USB interface 11 is detected as low and the second data pin (d+) as high, the battery 14 of the terminal device 10 is charged through the power pin (VBUS) of the USB interface 11.

In the embodiment of the present invention, the terminal device 10 may perform the subsequent charging operation according to the detected voltages by detecting the voltages of the first data pin (D-) and the second data pin (d+) on the USB interface 11. In practical application, when the first data pin (D-) is detected to be at a high level and the second data pin (d+) is detected to be at a low level, the charger is indicated to be a charger with a switch (i.e. the preset charger), the switching operation can be performed through the first switch 12, and the second switch of the preset charger is instructed to perform the switching operation, at this time, the charging mode is that the battery 14 of the terminal device 10 is charged through the power pin (VBUS) and the first data pin (D-) of the USB interface 11; when it is detected that the first data pin (D-) of the USB interface 11 is at a low level and the second data pin (d+) is at a high level, only the first data pin (D-) and the second data pin (d+) inside the charger are shorted and the switch (i.e., the normal charger) is not provided, at this time, the first switch 12 of the terminal device 10 does not need to perform a switching operation, and directly performs a charging operation, i.e., charges the battery 14 of the terminal device 10 through the power pin (VBUS) of the USB interface 11.

As shown in fig. 3, a schematic structural diagram of still another terminal device 10 according to an embodiment of the present invention is provided. The embodiment shown in fig. 3 shows the structure of the battery 14 based on the structure of the terminal device 10 shown in fig. 2, the battery 14 is connected to the charge management module 13, and the power pin (VBUS), the ground pin (GND), the first data pin (D-) and the second data pin (d+) of the battery 14 are connected to the power pin (VBUS), the ground pin (GND), the first data pin (D-) and the second data pin (d+) of the charge management module 13 in one-to-one correspondence; when the USB interface 11 of the terminal device 10 is connected to a charger and the enumeration identification of the charger is completed, the original shorts of the first data pin (D-) and the second data pin (d+) are disconnected through the first switch 12, and are allocated to the power pin (VBUS) and the ground pin (GND) in a one-to-one correspondence.

Fig. 4 is a schematic structural diagram of a charger according to an embodiment of the present invention. In the case where the charger provided in the present embodiment is suitable for performing quick charging, the charger 20 may include: a USB plug 21 and a second switch 22 for mating connection with the USB interface of the terminal device provided in the above embodiments.

Wherein the USB plug 21 includes a power pin, a ground pin, a first data pin, and a second data pin, and the first data pin is shorted with the second data pin; the one-to-one correspondence of the power pin, the ground pin, the first data pin, and the second data pin in the charger 20 shown in fig. 4 is denoted VBUS, GND, D-and d+.

It should be noted that, in the embodiment of the present invention, the USB interface and the USB plug 21 are USB having a first data pin (D-) and a second data pin (d+), for example, may be a Micro USB interface or plug, or may be a USB-C interface or plug, and it is satisfied that the USB interface and the USB plug may be used in cooperation.

In the current charging mode, in the design scheme of the USB socket of the charger at the charger side, the first data pin (D-) and the second data pin (D+) are in a short circuit relationship, so that the first data pin (D-) and the second data pin (D+) are in an idle state in the charging process; when in charging, the charger only transmits charging current to the USB interface of the terminal equipment through a power supply pin (VBUS) of the USB plug, and the maximum overcurrent capacity of the VBUS is 1.8A.

Also taking the terminal device as the smart phone for example, the default charging voltage of the smart phone is 5V, so that the charging current is limited by the maximum overcurrent capability of 1.8A under the condition of determining the charging voltage, which makes the rapid charging capability in the prior art limited greatly, and the charging speed is difficult to be improved.

The second switch 22 is configured to disconnect the short circuit of the first data pin (D-) and the second data pin (d+) of the USB plug 21 according to the indication of the terminal device when the USB plug 21 is inserted into the USB interface of the terminal device, short circuit the first data pin (D-) and the power pin (VBUS) of the USB plug 21, and short circuit the second data pin (d+) and the ground pin (GND).

In this embodiment of the present invention, the second switch 22 may also be a double-pole double-throw switch, where one switch is used to switch the connection relationship of the first data pin (D-) and the other switch is used to switch the connection relationship of the second data pin (d+), and when the charger 20 is connected to the USB interface of the terminal device through the second switch 22 provided in the charger 20, after the terminal device completes the enumeration identification of the charger 20, the short circuit between the first data pin (D-) and the second data pin (d+) of the USB plug 21 may be disconnected through the second switch 22 according to the indication of the terminal device, so that the first data pin (D-) of the USB plug 21 is short-circuited with the power pin (VBUS) and the second data pin (d+) is short-circuited with the ground pin (GND). According to the embodiment of the invention, through the switching function of the second switch 22, the charging current is shared on the first data pin (D-) and the second data pin (D+) in the charging process, so that the maximum overcurrent capacity of the USB interface can be improved.

In practical application, in the charging process of the prior art, charging current is transmitted to terminal equipment through a power supply pin (VBUS) of a USB plug, and the maximum overcurrent capacity of the charging current is limited to be 1.8A; according to the embodiment of the invention, the charging current is shared on the first data pin (D-) and the second data pin (D+) through the switching function of the second switch 22, and the charging current is transmitted to the terminal equipment through the power pin (VBUS) and the first data pin (D-) of the USB plug 21 in the charging process, so that the maximum overcurrent capacity of the charging current can be doubled, namely, the maximum overcurrent capacity can be improved to 3.6A, and therefore, the charging speed can be improved to a great extent, namely, the quick charging capacity is improved.

It should be noted that, the charger 20 provided in the embodiment of the present invention is the charger 20 used in cooperation with the terminal device in any of the embodiments shown in fig. 1 to 3, and the charger 20 has a structure corresponding to the terminal device (i.e., the second switch 22), so that a rapid charging effect can be achieved when the charger charges the terminal device.

According to the charger provided by the embodiment of the invention, the USB plug and the second change-over switch are configured for being matched and connected with the USB interface of the terminal equipment, when the USB plug is inserted into the USB interface of the terminal equipment, the short circuit of the first data pin and the second data pin of the USB plug can be disconnected according to the indication of the terminal equipment, the first data pin and the power pin of the USB plug are short-circuited, and the second data pin and the grounding pin are short-circuited, so that charging current can be transmitted to the terminal equipment through the power pin and the first data pin of the USB plug, and the maximum overcurrent capacity of the charging current is improved to a great extent; the charger provided by the embodiment of the invention solves the problem that the quick charging scheme in the prior art is influenced by various factors and is difficult to improve the quick charging capability.

In practical application, as shown in fig. 5, a schematic structural diagram of another charger provided in the embodiment of the present invention is shown in fig. 5, where a connection manner between a USB plug 21 of a charger 20 and a USB interface 11 of a terminal device 10 is shown, that is, a power pin (VBUS), a ground pin (GND), a first data pin (D-) and a second data pin (d+) of the USB plug 21 of the charger 20 are connected to the power pin (VBUS), the ground pin (GND), the first data pin (D-) and the second data pin (d+) of the USB interface in a one-to-one correspondence.

The second switch 22 is used for communicating with the terminal equipment through the first data pin (D-) and the second data pin (D+) of the USB plug 21.

The second switch 22 is further configured to short the first data pin (D-) of the USB plug 21 to the power pin (VBUS) after the short circuit of the first data pin (D-) and the second data pin (d+) of the USB plug 21 is disconnected, and transmit a charging current to the USB interface of the terminal device through the power pin (VBUS) and the first data pin (D-) of the USB plug 21 after the short circuit of the second data pin (d+) and the ground pin (GND).

In the embodiment of the present invention, the first data pin (D-) and the second data pin (d+) in the USB plug 21 are pins that communicate with the terminal device, and can receive the indication sent by the terminal device, and after the terminal device detects that the terminal device is normally connected to the charger 20, the terminal device delays for 2 seconds(s), and then instructs the second switch 22 of the charger 20 to disconnect the short circuit between the first data pin and the second data pin (D-) of the USB plug 21, short circuit between the first data pin (D-) of the USB plug 21 and the power pin (VBUS), and short circuit between the second data pin (d+) and the ground pin (GND), where the charger 20 can transmit the charging current to the USB interface of the terminal device through the power pin (VBUS) and the first data pin (D-) of the USB plug 21.

It should be noted that, after the terminal device instructs the second switch 22 of the charger 20 to perform the switching operation, the terminal device side also needs to perform the corresponding switching operation, and the operation of the terminal device side has been described in detail in the above embodiment, so that the details are not repeated here.

Fig. 6 is a schematic structural diagram of a charging system according to an embodiment of the present invention. The charging system 30 provided in the embodiment of the present invention includes: a terminal device 10 and a charger 20.

The terminal device 10 in the embodiment of the present invention is the terminal device 10 in any of the embodiments shown in fig. 1 to 3 (the terminal device 10 in the embodiment shown in fig. 6 is shown by way of example as the terminal device 10 shown in fig. 1), and the charger 20 is the charger 20 in any of the embodiments shown in fig. 4 or 5. The charging system 30 in the embodiment of the present invention has the same hardware structure as the terminal device 10 and the charger 20 described above, and can effectively improve the quick charging performance.

Fig. 7 is a schematic flow chart of a charging method according to an embodiment of the present invention. In the case that the terminal device provided in the embodiment is suitable for performing fast charging, the charging method may be performed by the charging system in the embodiment of the present invention, and the charging method may include the following steps:

S110, judging whether a charger connected with the terminal equipment is a preset charger.

The charging method provided by the embodiment of the invention is a method capable of improving the charging speed. The charging method can be performed by the terminal device and the preset charger which are matched with each other, and the preset charger is different from a common charger in the prior art, so that the terminal device can firstly judge whether the terminal device is connected with the preset charger or not, namely whether the terminal device is connected with the preset charger or not in any embodiment shown in fig. 4 or 5.

The charging system for executing the charging method according to the embodiment of the present invention may refer to the charging system shown in fig. 6, where the connection relationship between the terminal device and the charger may refer to the terminal device in any one of the embodiments shown in fig. 1 to 3, the connection relationship between the preset charger and the charger, and the connection relationship between the preset charger and the terminal device may refer to the charger in any one of the embodiments shown in fig. 4 or 5.

S120, when the charger is judged to be the preset charger, the short circuit of the first data pin and the second data pin of the USB plug in the preset charger is disconnected, the first data pin and the power pin of the USB plug are short-circuited, the second data pin and the ground pin are short-circuited, the first data pin and the power pin of the USB interface in the terminal equipment are short-circuited, and the second data pin and the ground pin are short-circuited.

It should be noted that, the USB interface and the USB plug in the embodiment of the present invention are also USB having a first data pin (D-) and a second data pin (d+), for example, may be a Micro USB interface or plug, or may be a USB (i.e. USB-C, also referred to as Type-C) interface or plug with a model number C, and it is satisfied that the USB interface or the USB plug may be matched for use.

In the embodiment of the invention, if the terminal equipment is connected with the preset charger, the terminal equipment can use a quick charging scheme to charge, namely after the terminal equipment completes enumeration identification of the charger, the short circuit of a first data pin (D-) and a second data pin (D+) in the preset charger can be disconnected at the charger side, the first data pin (D-) of the USB plug is short-circuited with a power supply pin (VBUS), and the second data pin (D+) is short-circuited with a ground pin (GND); on the terminal device side, the first data Pin (D-) of the USB interface may be shorted to the power Pin (VBUS), the second data Pin (d+) may be shorted to the ground Pin (GND), at this time, both the power and ground lines are allocated 2 pins (Pin), i.e., the power supply allocates the power Pin (VBUS) and the first data Pin (D'), the ground line allocates the ground Pin (GND) and the second data Pin (d+), and the flow direction of the current flows back from the power Pin (VBUS) to the ground Pin (GND), so that an excessive current on the USB interface 11 may be realized. Through the change of the pin connection relation between the USB plug and the USB interface, the charging current can be shared on the first data pin (D-) and the second data pin (D+) in the charging process, so that the maximum overcurrent capacity of the USB interface can be improved.

In practical application, in the charging process of the prior art, terminal equipment is charged through a power supply pin (VBUS) of a USB interface, and the maximum overcurrent capacity of charging current is limited to be 1.8A; according to the embodiment of the invention, the charging current is shared on the first data pin (D-) and the second data pin (D+), and the terminal equipment is charged through the power supply pin (VBUS) and the first data pin (D-) of the USB interface in the charging process, so that the maximum overcurrent capacity of the charging current can be doubled, namely, the maximum overcurrent capacity can be improved to 3.6A, and therefore, the charging speed can be improved to a great extent, namely, the quick charging capacity is improved.

The charging method provided by the embodiment of the present invention is a processing method of the charging system provided by the foregoing embodiment of the present invention, and has corresponding method steps, and implementation principles and technical effects are similar, and are not repeated herein.

Optionally, fig. 8 is a schematic flow chart of another charging method according to an embodiment of the present invention. In practical applications, when the USB interface of the terminal device is plugged into a USB plug, the USB plug may be a plug of a charger, or may be a plug of another device, for example, a plug of a data line connected through a computer. Therefore, the method provided by the embodiment of the present invention may further include, before S110:

s100, judging whether a USB interface of the terminal equipment is connected with a charger or not;

s101, when the first data pin and the second data pin of the USB plug are detected to be short-circuited, the terminal equipment is determined to be connected with the charger.

In the current charger design, a first data pin (D-) in the USB plug is in short circuit with a second data pin (D+) and the terminal equipment can determine that a device connected with the USB interface is a charger or other equipment through judging the connection relation. The charger adopts an AC charging mode, and if the USB plug is a plug of a data line connected through a computer, the terminal equipment is charged by adopting a DC charging mode. Specifically, the condition for judging whether a device connected with the USB interface of the terminal device is a charger is: a short circuit between a first data pin (D-) and a second data pin (D+) in the USB plug is detected.

On the other hand, the method provided by the embodiment of the invention can further comprise the following steps:

S102, when the first data pin and the second data pin of the USB plug are detected not to be short-circuited, the battery of the terminal equipment is charged through the power pin of the USB interface.

In the embodiment of the present invention, when the detection result is that the terminal device is not shorted, it is indicated that the USB interface of the terminal device is connected to a non-AC charger, for example, connected to a computer through a data line, and at this time, the battery of the terminal device is charged through a power pin (VBUS) of the USB interface, and the current in the charging process is 500mA.

Alternatively, in the embodiment of the present invention, in the case where it has been determined that the USB interface is connected to the charger, the charger may be a common charger in the prior art, or may be a charger for performing quick charging, that is, a preset charger, used in cooperation with the terminal device in the embodiment of the present invention, and therefore, a corresponding charging operation needs to be performed according to the type of the charger. Therefore, the method provided by the embodiment of the present invention may further include, after S101: and executing corresponding charging operation according to the detected voltages of the first data pin and the second data pin of the USB interface.

In practical application, the detection and charging modes of the embodiment of the invention can include:

S110, judging whether the charger is a preset charger according to the detected voltages of the first data pin and the second data pin of the USB interface;

S111, when the first data pin of the USB interface is detected to be at a high level and the second data pin is detected to be at a low level, determining that the charger is a preset charger;

And S112, when the first data pin of the USB interface is detected to be at a low level and the second data pin is detected to be at a high level, determining that the charger is a common charger.

Accordingly, S120 in the embodiment of the present invention may include:

after S111 may include:

S121, the short circuit of the first data pin and the second data pin of the USB plug in the preset charger is disconnected, the first data pin and the power pin of the USB plug are short-circuited, the second data pin and the grounding pin are short-circuited, the first data pin and the power pin of the USB interface in the terminal equipment are short-circuited, and the second data pin and the grounding pin are short-circuited, so that the battery of the terminal equipment is charged through the power pin and the first data pin of the USB interface.

After S112 may include:

S122, charging the battery of the terminal equipment through the power pin of the USB interface.

In the embodiment of the invention, the terminal equipment can detect the voltage of the first data pin (D-) and the second data pin (D+) on the USB interface, thereby executing the subsequent charging operation according to the detected voltage. In practical application, when the first data pin (D-) is detected to be at a high level and the second data pin (d+) is detected to be at a low level, the charger is indicated to be a charger with a switch (i.e. the preset charger), the switching operation can be performed through the first switch, and the second switch of the preset charger is indicated to perform the switching operation, at this time, the charging mode is that the battery of the terminal device is charged through the power pin (VBUS) and the first data pin (D-) of the USB interface; when the first data pin (D-) of the USB interface is detected to be at a low level and the second data pin (D+) is detected to be at a high level, the first data pin (D-) and the second data pin (D+) inside the charger are only short-circuited and a switch (namely a common charger) is not needed, and at this time, the first switch of the terminal equipment does not need to execute a switching operation, and the charging operation is directly executed, namely, the battery of the terminal equipment is charged through the power pin (VBUS) of the USB interface.

The embodiment of the invention also provides a computer readable storage medium, which stores computer executable instructions, and when the processor executes the computer executable instructions, the following operations are performed:

s210, judging whether a charger connected with the terminal equipment is a preset charger or not;

S220, when the charger is judged to be the preset charger, the short circuit of the first data pin and the second data pin of the USB plug in the preset charger is disconnected, the first data pin and the power pin of the USB plug are short-circuited, the second data pin and the ground pin are short-circuited, the first data pin and the power pin of the USB interface in the terminal equipment are short-circuited, and the second data pin and the ground pin are short-circuited.

Optionally, in an embodiment of the present invention, when the processor executes the computer executable instructions, before executing S210, the following operations are further performed:

s200, judging whether a USB interface of the terminal equipment is connected with a charger or not;

s201, when the first data pin and the second data pin of the USB plug are detected to be short-circuited, the terminal equipment is determined to be connected with the charger;

S202, when the first data pin and the second data pin of the USB plug are detected not to be short-circuited, the battery of the terminal equipment is charged through the power pin of the USB interface.

Optionally, in an embodiment of the present invention, when the processor executes the computer executable instructions, the following operations are further performed:

when the terminal equipment is connected with the charger, corresponding charging operation is executed according to the detected voltages of the first data pin and the second data pin of the USB interface.

Optionally, in an embodiment of the present invention, when the processor executes the computer executable instructions, an implementation of the performing step of "performing a corresponding charging operation according to the detected voltage" may include:

When the first data pin of the USB interface is detected to be high level and the second data pin is detected to be low level, determining that the charger is a preset charger, and charging a battery of the terminal equipment through the power pin and the first data pin of the USB interface;

Those of ordinary skill in the art will appreciate that all or a portion of the steps of the methods described above may be performed by a program that instructs associated hardware (e.g., a processor) to perform the steps, and that the program may be stored on a computer readable storage medium such as a read only memory, a magnetic or optical disk, etc. Alternatively, all or part of the steps of the above embodiments may be implemented using one or more integrated circuits. Accordingly, each module/unit in the above embodiments may be implemented in the form of hardware, for example, by an integrated circuit, or may be implemented in the form of a software functional module, for example, by a processor executing a program/instruction stored in a memory to implement its corresponding function. Embodiments of the invention are not limited to any specific form of combination of hardware and software.

Although the embodiments of the present invention are described above, the embodiments are only used for facilitating understanding of the present invention, and are not intended to limit the present invention. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is to be determined by the appended claims.

Claims

1. A terminal device, comprising: the charging management module is used for being connected with the USB interface through the first change-over switch;

The first change-over switch is used for shorting a first data pin of the USB interface with a power pin and shorting a second data pin with a grounding pin when the terminal equipment detects that the USB interface is connected with a preset charger; the preset charger is a charger with a second change-over switch;

The power supply pin, the grounding pin, the first data pin and the second data pin of the charging management module are in one-to-one correspondence with the power supply pin, the grounding pin, the first data pin and the second data pin of the USB interface;

The charging management module is used for judging that the charger is a preset charger when a first data pin of the USB interface is at a high level and a second data pin of the USB interface is at a low level when the USB interface is connected with the charger, and charging a battery of the terminal equipment through a power pin and the first data pin of the USB interface; and when the charger is not the preset charger, charging the battery of the terminal equipment through the power pin of the USB interface.

2. The terminal device of claim 1, wherein the charge management module is configured to communicate with the preset charger through a first data pin and a second data pin of the USB interface, instruct a second switch of the preset charger to disconnect the short between the first data pin and the second data pin of the USB plug, and instruct a second switch of the preset charger to short between the first data pin and a power pin of the USB plug, and short between the second data pin and a ground pin.

3. The terminal device according to claim 2, wherein,

The charging management module is further configured to determine whether a first data pin in the USB plug is shorted with a second data pin when it is detected that the USB plug is inserted into the USB interface, and determine that the USB interface is connected with a charger when it is determined that the first data pin is shorted with the second data pin.

4. The terminal device of claim 1, wherein the terminal device,

The charging management module executes corresponding short-circuit operation according to the detected voltage, and the charging management module comprises:

And when the first data pin of the USB interface is detected to be at a high level and the second data pin is detected to be at a low level, the first change-over switch of the terminal equipment is instructed to short-circuit the first data pin of the USB interface with the power pin, and the second data pin is short-circuited with the grounding pin.

5. A terminal device according to claim 3, wherein,

And the charging management module is also used for charging the battery of the terminal equipment through the power pin of the USB interface when the first data pin and the second data pin in the USB plug are judged not to be short-circuited.

6. A charging system, comprising: a terminal device according to any one of claims 1 to 5.

7. A charging method, comprising:

Judging whether a charger connected with the terminal equipment is a preset charger or not, wherein the preset charger is a charger with a second change-over switch;

When a first data pin of a USB interface is at a high level and a second data pin is at a low level, judging that the charger is a preset charger, disconnecting a short circuit of the first data pin and the second data pin of a USB plug in the preset charger, shorting the first data pin of the USB plug with a power supply pin, shorting the second data pin with a grounding pin, shorting the first data pin of the USB interface in the terminal equipment with the power supply pin, and shorting the second data pin with the grounding pin; charging a battery of the terminal equipment through a power pin and a first data pin of the USB interface;

and when the charger is judged not to be the preset charger, charging the battery of the terminal equipment through the power pin of the USB interface.

8. The charging method according to claim 7, wherein before the determining whether the charger connected to the terminal device is a preset charger, the method further comprises:

9. The charging method according to claim 8, characterized by further comprising:

10. A computer-readable storage medium storing computer-executable instructions that, when executed by a processor, perform the operations of: