CN110098652A

CN110098652A - A kind of mobile phone, mobile phone body device and mobile phone are continued a journey device

Info

Publication number: CN110098652A
Application number: CN201910473448.8A
Authority: CN
Inventors: 尹荣贻
Original assignee: Hisense Mobile Communications Technology Co Ltd
Current assignee: Hisense Mobile Communications Technology Co Ltd
Priority date: 2019-01-18
Filing date: 2019-05-31
Publication date: 2019-08-06
Anticipated expiration: 2039-05-31
Also published as: CN111463842A; CN111463842B; CN109802457A; CN110112810A; CN110098652B

Abstract

A kind of mobile phone, mobile phone body device and mobile phone are continued a journey device, and mobile phone power supply technique field is related to.The embodiment of the present invention is able to extend the cruise duration of mobile phone, while being also convenient for using and operating for user.The mobile phone includes: that mobile phone includes mobile phone body device and mobile phone continuation of the journey device；Mobile phone body device includes the first battery, power load；Mobile phone continuation of the journey device includes: the second battery；It is provided with the first external interface on mobile phone body device, is provided with third external interface on mobile phone continuation of the journey device；Wherein, mobile phone body device can be detachably fixed with mobile phone continuation of the journey device；When mobile phone body device and mobile phone continuation of the journey device are detachably fixed, the first external interface is coupled with third external interface, so that being charged using the second battery to the first battery, and/or is powered using the second battery to power load.The present invention is applied to mobile phone.

Description

Mobile phone, mobile phone main body device and mobile phone endurance device

The present application claims priority of chinese patent application entitled "an electronic device and a charging method thereof" filed by the national intellectual property office on 18/1/2019, application No. 201910047190.5, the entire contents of which are incorporated herein by reference.

Technical Field

The invention relates to the technical field of power supply of electronic equipment, in particular to a mobile phone, a mobile phone main body device and a mobile phone endurance device.

Background

With the technical development and wide use of various intelligent electronic devices, the dependence degree of users on mobile phones is higher and higher, and the use frequency is higher and higher. For convenience of use, mobile phones are gradually becoming thinner and lighter. This results in limited expansion of battery capacity in the handset.

In order to guarantee the endurance time of the mobile phone, a plurality of users need to carry with them mobile power supplies such as a mobile power bank to charge the mobile phone, and the use experience of the users is seriously influenced. In addition, the existing mobile power supply also has the problems of low electric quantity utilization rate and the like.

Disclosure of Invention

The invention provides a mobile phone, a mobile phone main body device and a mobile phone endurance device, which can prolong the endurance time of the mobile phone and facilitate the use and operation of a user.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

in a first aspect, an embodiment of the present invention provides a mobile phone, where the mobile phone includes: the mobile phone comprises a mobile phone main body device and a mobile phone endurance device; the mobile phone main body device comprises a first battery and a power utilization load; the cell-phone continuation of journey device includes: a second battery; the mobile phone main body device is provided with a first external interface, and the mobile phone endurance device is provided with a third external interface; the mobile phone main body device can be detachably fixed with the mobile phone endurance device; when the mobile phone main body device and the mobile phone endurance device are detachably fixed, the first external interface is coupled with the third external interface, so that the second battery is used for charging the first battery, and/or the second battery is used for supplying power to the power load.

In a second aspect, an embodiment of the present invention provides a mobile phone main body device, including a first battery, an electricity load; a first external interface is arranged on the mobile phone main body device; the mobile phone main body device can be detachably fixed with the mobile phone endurance device; the cell-phone continuation of journey device includes: a second battery; a third external interface is arranged on the mobile phone cruising device; when the mobile phone main body device and the mobile phone endurance device are detachably fixed, the first external interface is coupled with the third external interface, so that the second battery is used for charging the first battery, and/or the second battery is used for supplying power to the power load.

In a third aspect, an embodiment of the present invention provides a mobile phone endurance device, where the mobile phone endurance device includes: a second battery; a third external interface is arranged on the mobile phone cruising device; the mobile phone endurance device can be detachably fixed with the mobile phone main body device; the mobile phone comprises a mobile phone main body device, a first battery and a power utilization load, wherein the mobile phone main body device comprises the first battery and the power utilization load; a first external interface is arranged on the mobile phone main body device; when the mobile phone main body device and the mobile phone endurance device are detachably fixed, the first external interface is coupled with the third external interface, so that the second battery is used for charging the first battery, and/or the second battery is used for supplying power to the power load.

The mobile phone provided by the embodiment of the invention also comprises a mobile phone endurance device with a built-in second battery, besides the mobile phone main body device providing corresponding use functions for users. When the mobile phone main body device and the mobile phone endurance device are detachably fixed, the first external interface on the mobile phone main body device can be coupled with the third external interface on the mobile phone endurance device, so that the second battery in the mobile phone endurance device is used for supplying power to the mobile phone main body device. Specifically, the charging of the first battery in the mobile phone main body device by the second battery and/or the power supply of the electric load by the second battery can be controlled according to the use requirements of the user. Therefore, the endurance time of the mobile phone is prolonged, and meanwhile, the user does not need to additionally carry mobile power supply equipment such as a charge pal for charging the mobile phone, so that the use experience of the user is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

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

fig. 2 is a second schematic structural diagram of a mobile phone according to an embodiment of the present invention;

fig. 3 is a third schematic structural diagram of a mobile phone according to an embodiment of the present invention;

fig. 4 is an external view of a mobile phone main body device according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a cellular phone endurance device according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a mobile phone main body device according to an embodiment of the present invention;

fig. 7 is a second schematic structural diagram of a mobile phone main body device according to an embodiment of the present invention;

fig. 8 is a schematic view of a display interface of a mobile phone main body device according to an embodiment of the present invention;

fig. 9 is a fourth schematic structural diagram of a mobile phone according to an embodiment of the present invention;

fig. 10 is a third schematic structural diagram of a mobile phone main body device according to an embodiment of the present invention;

fig. 11 is a fifth schematic structural diagram of a mobile phone according to an embodiment of the present invention;

fig. 12 is a fourth schematic structural diagram of a mobile phone main body device according to an embodiment of the present invention;

fig. 13 is a fifth schematic structural view of a mobile phone main body device according to an embodiment of the present invention;

fig. 14 is a schematic diagram of a battery front-end circuit according to an embodiment of the present invention;

fig. 15 is a schematic structural diagram of a battery charging chip circuit according to an embodiment of the present invention.

Reference numerals:

01-mobile phone; 10-mobile phone main body device; 20-a cell phone endurance device; 101-using electrical load; 102-a first battery; 103-a first external interface; 104-a second external interface; 105-a first charging circuit; 106-a first protection circuit; 107-a second protection circuit; 201-a second battery; 202-a third external interface; 203-a fourth external interface; 204-a single chip microcomputer; 205-a third protection circuit; 1051-a conversion unit; 1052-a charging control unit; 106 a-first protection circuit; 106 b-first protection circuit.

Detailed Description

Embodiments of the present invention will be described below with reference to the accompanying drawings.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items. The character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.

It is to be understood that, although the terms first, second, third, etc. may be used in describing various apparatuses, devices, components, messages, requests, operations, etc. in the embodiments of the present invention, these apparatuses, devices, components, messages, requests, operations, etc. should not be limited by these terms. These terms are only used to distinguish one device, apparatus, component, message, request, and operation from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of embodiments of the present invention.

The word "if" or "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be construed as "when determined" or

"responsive to a determination" or "upon detection (of a stated condition or event)" or "responsive to detection (of a stated condition or event)".

Fig. 1 is a schematic structural diagram of a mobile phone 01 according to an embodiment of the present invention. The mobile phone 01 specifically includes: a mobile phone main body device 10 and a mobile phone cruising device 20.

The cellular phone navigation system 20 may be detachably fixed to the back of the cellular phone main body 10 in the shape of a cellular phone vest. At this time, the mobile phone main body device 10 can be embedded in the mobile phone endurance device 20 to fix the positions of the mobile phone main body device 10 and the mobile phone endurance device 20.

The mobile phone body device 10 includes a power load 101 and a first battery 102. The mobile phone cruising device 20 includes: a second battery 201.

The mobile phone main body device 10 is provided with a first external interface 103; the third external interface 202 is arranged on the cell phone cruising device 20.

The mobile phone main body device 10 can be detachably fixed with the mobile phone endurance device 20; when the handset main body device 10 is detachably fixed to the handset continuation device 20, the first external interface 103 is coupled to the third external interface 202 so that the first battery 102 is charged with the second battery 201 and/or the electric load 101 is supplied with power with the second battery 201.

Specifically, the first external interface 103 includes a first pin contact interface provided on the mobile phone main body device 10, and the third external interface 202 includes a second pin contact interface provided on the mobile phone endurance device 20.

In one implementation, the main body device 10 further includes a second external interface 104, and the cruising device 20 further includes a fourth external interface 203. The second external interface 104 and the fourth external interface 203 are connectable to external devices, respectively.

The main body device 10 of the mobile phone can be charged through the second external interface 104, and the endurance device 20 of the mobile phone can be charged through the fourth external interface 203.

Exemplarily, as shown in fig. 2, an appearance of a mobile phone 01 according to an embodiment of the present invention is schematically illustrated. The first external interface 103 is disposed on the back surface of the mobile phone main body device 10, and the third external interface 202 is disposed on the inner surface of the mobile phone endurance device 20. In one implementation, as shown in fig. 2, the first external interface 103 may be a pin contact interface (i.e., a first pin contact interface in the drawing), and the third external interface 202 may be a pin contact interface (i.e., a second pin contact interface in the drawing). The mobile phone main body device 10 and the mobile phone cruising device 20 can be detachably fixed. When the mobile phone main body device 10 and the mobile phone endurance device 20 can be detachably fixed, the back surface of the mobile phone main body device 10 is attached to the inner surface of the mobile phone endurance device 20, so that the first thimble contact interface is coupled with the second thimble contact interface.

As shown in fig. 2, the second external interface 104 is further disposed on the lower surface of the housing of the main body device 10 of the mobile phone, and the fourth external interface 203 is further disposed on the lower surface of the cruising device 20 of the mobile phone. Illustratively, the second external interface 104 and the fourth external interface 203 may be any one of a USB interface and a Type-c interface, respectively, for connecting an external device to implement a charging or data interaction function.

In one implementation, as shown in fig. 3, a first charge control circuit is further provided in the mobile phone main body device 10, and a second charge control circuit is further provided in the mobile phone cruising device 20. The first charging control circuit is configured to obtain electric energy from the first thimble contact interface or the second external interface 104 to supply power to the first battery 102 and the electric load 101. And the second charging control circuit is used for acquiring electric energy from the second thimble contact interface or the fourth external interface 203 to charge the second battery 201. In addition, the second charging control circuit is further configured to utilize the electric energy in the second battery 201 to supply power to the mobile phone main body device 10 through the second thimble contact interface and the first thimble contact interface, specifically including charging the first battery 102 and/or supplying power to the electric load 101.

In the embodiment of the present invention, in order to describe the relationship between the mobile phone 01 and the mobile phone main body device 10 and the mobile phone cruising device 20 included in the mobile phone 01, the mobile phone main body device 10 and the mobile phone cruising device 20 are respectively referred to as "devices". In a specific embodiment, the mobile phone main body device 10 and the mobile phone cruising device 20 may be sold and used as separate devices. When the mobile phone main body apparatus 10 is sold as a separate product, the mobile phone main body apparatus 10 may be also referred to as a "mobile phone" or the like by itself. The present invention is not limited to this.

For example, the handset main body device 10 may be used as a stand-alone electronic device in a normal case. The first battery 102 is powered by the electrical load 101, so that the mobile phone main body device 10 can perform corresponding functions. The power load 101 may specifically include components such as an input/output module (including a display screen, a key, a touch screen, and the like), a data operation module (including a processor, a memory, and the like), and a communication module (including a transceiver, an antenna, and the like) in a mobile phone.

Exemplarily, as shown in fig. 4, an external perspective view of a mobile phone main body device 10 according to an embodiment of the present invention is provided. A first thimble contact interface is disposed on the back of the housing of the mobile phone main body device 10. The housing bottom surface is also provided with a second external interface 104.

Fig. 5 is a perspective view of an appearance of a cellular phone cruising device 20 according to an embodiment of the present invention. Wherein, a second thimble contact interface is arranged on the inner side surface of the mobile phone endurance device 20. The housing bottom surface is also provided with a fourth external interface 203.

The mobile phone main body device 10 shown in fig. 4 and the mobile phone cruising device 20 shown in fig. 5 can be detachably fixed to each other. When the mobile phone main body device 10 shown in fig. 4 and the mobile phone duration device 20 shown in fig. 5 can be detachably fixed, the back surface of the mobile phone main body device 10 is attached to the inner surface of the mobile phone duration device 20, so that the first thimble contact interface is coupled to the second thimble contact interface.

Specifically, in practical application, the contact interface of the thimble on the mobile phone main body device 10 may be a metal groove. The contact interface of the thimble on the cruising device 20 of the mobile phone can be a metal protruding elastic sheet corresponding to the metal groove. The relationship between the contact interface of the thimble on the main body device 10 of the mobile phone and the contact interface of the thimble on the endurance device 20 of the mobile phone may be similar to the relationship between the male and female connectors. In addition, it should be noted that the contact of the thimble contact interface in the embodiment of the present invention may be in a circular shape, a square shape, or other shapes, and the present invention is not limited thereto.

Specifically, table 1 below provides an interface definition of a thimble contact interface:

TABLE 1

In one embodiment, as shown in fig. 6, the handset main body device 10 further includes a first charging circuit 105; the first charging circuit 105 includes: a conversion unit 1051 and a charging control unit 1052; wherein:

the input end of the conversion unit 1051 is connected to the charging end of the mobile phone main body device 10, and the output end is connected to the input end of the charging control unit 1052 and the power input end of the electric load 101, respectively; the output terminal of the charging control unit 1052 is connected to the first battery 102;

a conversion unit 1051 for stepping down a voltage received from a charging terminal of the handset main body device 10 and outputting the voltage from an output terminal of the conversion unit 1051 to supply power to the power load 101 and charge the first battery 102 through the charging control unit 1052;

a charging control unit 1052, configured to disconnect a path between the input terminal and the output terminal of the charging control unit 1052 after a preset condition is met, and stop charging the first battery 102 through the charging control unit 1052.

For example, as shown in fig. 6, an input terminal of the conversion unit 1051 is connected to the charging terminal of the mobile phone main body apparatus 10, and an output terminal thereof is connected to the input terminal of the charging control unit 1052 and the power input terminal of the electric load 101 at the node VPH _ PWR. The electricity load 101 can thereby obtain power through VPH _ PWR to operate, and the charging control unit 1052 can obtain power through VPH _ PWR to charge the first battery 102.

The charging terminal of the main body device 10 may be specifically an interface of the main body device 10 for connecting with an external power supply and inputting the voltage of the external power supply to the main body device 10. For example, the charging terminal of the main body device 10 may be a terminal pin of the main body device 10 capable of receiving a charging voltage input from the charging terminal pin of the first external interface 103 and a charging voltage input from the charging terminal pin of the second external interface 104, for example, the charging terminal may be an output terminal of a power switch unit U2 provided below.

For example, at present, the external power supply connected to the USB interface of the mobile phone is generally about 5V. Therefore, after the external power supply is connected to the charging interface, the connected external power supply needs to be stepped down. Specifically, as shown in fig. 6, the converting unit 1051 steps down the voltage of the external power source to 5V to 3V-4.4V. Then, the power load 101 is supplied and the first battery 102 is charged through the VPH _ PWR node. At this time, the output current of the conversion unit 1051 is the sum of the current consumption of the electric load 101 and the charging current of the first battery 102 (specifically, the average current of the electric load of the conventional smartphone is about 400mA, and the charging current of the battery is about 2000 mA). This results in inefficient use of the power from the external power source. Particularly, when the external power supply is a portable power supply, efficient use of electric power in the portable power supply is affected.

Furthermore, in the embodiment of the present invention, the charging control unit 1052 is disposed between the VPH _ PWR node and the first battery 102, and the charging control unit 1052 is enabled to disconnect the path between the input terminal and the output terminal of the charging control unit to stop charging the battery when the preset condition is satisfied. At this time, the current at the VPH _ PWR node is equal to the power consumption of the electrical load 101 (i.e., the current is reduced from about 1900mA to about 400 mA), so the path loss is greatly reduced.

In addition, after the path between the input terminal and the output terminal of the charging control unit 1052 is disconnected,

the voltage at the VPH _ PWR node can be maintained at the level of the nominal operating voltage (typically 4.4V). Therefore, the voltage difference between the input terminal and the output terminal of the converting unit 1031 is the voltage difference VBUS-VPH _ PWR between the charging interface and the VPH _ PWR node at this time, which is lower than the voltage difference VBUS-VBAT between the charging interface and the positive electrode of the first battery 102 (the voltage VBAT of the power supply input terminal of the first battery 102 is between 3-4.4V). For example, if the voltage of the external power supply is 5V, VBUS-VPH _ PWR is 5V-4.4V;

VBUS-VBAT 5V-VBAT, VBUS-VPH _ PWR is typically lower than VBUS-VBAT, since VBAT can only reach 4.4V when the battery is fully charged. Thus, the voltage drop between the input end and the output end of the conversion unit 1051 is reduced, so that the conversion efficiency of the conversion unit 1051 is improved, and the power supply efficiency is improved.

Specifically, the conversion unit 1051 includes: the PWM driving module, the first MOS tube, the second MOS tube, the inductor and the first capacitor; the PWM driving module is respectively connected with the grid electrode of the first MOS tube and the grid electrode of the second MOS tube; the drain electrode of the first MOS tube is connected with one end of a capacitor, and the other end of the capacitor is grounded; the drain electrode of the first MOS tube is also connected with a charging end; the source electrode of the first MOS tube is connected with the drain electrode of the second MOS tube, and the source electrode of the first MOS tube is also connected with the output end of the conversion unit through an inductor; the source electrode of the second MOS tube is grounded. The PWM driving module is used for driving the first MOS tube and the second MOS tube to be switched on and off, the first MOS tube, the second MOS tube, the capacitor and the inductor form a buck voltage reduction circuit, and the voltage VBUS of an external power supply connected to a charging end is converted into the specified voltage VPH _ PWR.

Further, the conversion unit 1051 further includes: a current path control module and a fourth MOS tube. The current path control module is connected with a grid electrode of the fourth MOS tube, and a drain electrode of the first MOS tube is connected with a charging end through a source electrode and a drain electrode of the fourth MOS tube.

The charging control unit 1052 includes: the charging control module and the third MOS tube; the charging control module is connected with a grid electrode of a third MOS tube, a drain electrode of the third MOS tube is connected with the output end of the conversion unit, and a source electrode of the third MOS tube is connected with the first battery 102; and the charging control module is used for controlling the third MOS tube to be in a cut-off state after a preset condition is met.

Specifically, as shown in fig. 7, the conversion unit 1051 specifically includes: the circuit comprises a current path control module (Currentpathcontrol), a PWM drive module (PWMdrivers), a first MOS tube Q1, a second MOS tube Q2, a fourth MOS tube Q4, an inductor L1 and a first capacitor C1. The PWM driving module is used for driving the Q1 and the Q2 to be switched on and off, the Q1, the Q2, the C1 and the L1 form a buck voltage reduction circuit, and the voltage VBUS of an external power supply connected to a charging end is converted into a specified voltage VPH _ PWR. The current path control module controls the on and off of the Q4. The charging control unit 1052 specifically includes: a charging control module (charging control) and a third MOS transistor Q3. The charging control module is used for controlling the on-off of the Q3.

In addition, the mobile phone main body device 10 may further include a logic control module (logic control) for controlling the operation of the current path control module, the PWM driving module, and the battery control module. Specifically, the logic control module may control the PWM driving module to control on/off of Q1 and Q2 according to the voltage value of the first battery 102, so as to control the voltage of the VPH _ PWR node. In addition, the logic control module also controls the battery control module to control the Q3 to be turned off after the preset condition is met.

In one implementation, the charging control unit 1052 is specifically configured to disconnect the path between the input terminal and the output terminal of the charging control unit 1052 when it is detected that the external device connected to the mobile phone main body device is a mobile power source and it is detected that the power of the first battery 102 is greater than the power threshold.

In the embodiment of the present invention, the portable power source specifically includes various devices that use their built-in batteries to charge the mobile phone main body device 10. In one implementation, the mobile power source may be a cellular endurance device 20. Furthermore, in the embodiments of the present invention:

the charging control unit 1052 is specifically configured to disconnect the path between the input terminal and the output terminal of the charging control unit 1052 when detecting that the external device connected to the main device of the mobile phone is the mobile phone cruising device 20 and detecting that the power of the first battery 102 is greater than the power threshold.

For example, after the handset main body device 10 is connected to the handset continuation device 20, the remaining capacity of the first battery 102 is detected. If the remaining power of the first battery 102 is higher than the predetermined power (e.g., 30% remaining power), the input terminal and the output terminal of the charging control unit 1052 are disconnected, and the charging of the first battery 102 is stopped. At this time, the mobile phone endurance device 20 only supplies power to the electric load 101, so the current is small; meanwhile, the voltage of the node VPH _ PWR is high, so that the conversion efficiency of the conversion unit 1051 is high, and the power supply efficiency is improved. The mobile phone endurance device 20 can supply power to the mobile phone main body device 10 for a longer time, and the standby time and the endurance time of the mobile phone main body device 10 are prolonged.

Additionally, in another implementation, it may also be possible for the user to select when to let the external power supply alone power the electrical load 101 without charging the first battery 102. Therefore, the charging control unit 1052 is further specifically configured to disconnect the path between the input terminal and the output terminal of the charging control unit 1052 when a preset operation by the user is detected.

In addition, in the embodiment of the invention, the situation of the residual capacity of the mobile power supply can be directly and clearly known by a user. The mobile phone main body device 10 provided by the embodiment of the present invention is further configured to display a circuit of the portable power source on the display interface when the external power source is the portable power source.

For example, as shown in fig. 8, after acquiring the power information of the cellular phone cruising device 20 in some way, the cellular phone main body device 10 displays the power of the cellular phone cruising device 20 on the display interface.

Specifically, in order to keep the display interface simple and beautiful, the power of the cellular phone endurance device 20 is displayed on the display interface of the cellular phone in the embodiment of the present invention, and the power is displayed at a position parallel to the position of the power of the first battery 102 of the cellular phone main body device 10.

In an implementation manner, as shown in fig. 9, an embodiment of the present invention further provides a schematic structural diagram of a mobile phone main body device 10. The mobile phone main body device 10 includes: the PMIC power management system comprises a PMIC power management integrated circuit U1, a USB switch U3, a processor U4, a first external interface 103, a first battery 102 and an electric load 101. In fig. 9, the above description can be referred to for the first external interface 103.

In addition, the mobile phone main body device 10 further includes: a second external interface 104 and a power switching unit U2.

Specifically, in fig. 9, the power management integrated circuit U1 is used to manage the power supply device in the handset main body apparatus 10. The power management integrated circuit U1 includes the first charging circuit 105 described above.

As shown in fig. 9, a first terminal of the power switch unit U2 is connected to the charging terminal, and a second terminal of the power switch unit U2 is connected to the charging terminal pin WAIBU _ VBUS of the first external interface 103;

the power switch unit U2 is configured to conduct between the power pin and the charging terminal of the first external interface 103 when the first external interface 103 is coupled to the third external interface 202.

When the cellular phone endurance device 20 is installed on the cellular phone main body device 10, the cellular phone endurance device 20 outputs the external power voltage to the charging terminal through the charging terminal pin VBUS of the first external interface 103.

For example, as shown in fig. 9, when the cellular phone cruising device 20 is mounted on the cellular phone main body device 10, the cellular phone main body device 10 detects whether the cellular phone cruising device 20 is mounted through the DET terminal pin of the first external interface 103. After detecting that the cellular phone endurance device 20 is installed, the power switch unit U2 connects the VBUS terminal of the first external interface to the charging terminal, so that the cellular phone endurance device 20 can charge the cellular phone main body device 10 through the VBUS terminal.

In the above embodiment of the present invention, after the first external interface of the main body device 10 of the mobile phone is coupled to the second external interface of the endurance device 20 of the mobile phone, the power switch unit U2 will conduct the charging pin and the charging terminal of the first external interface, so as to charge the main body device 10 by using the endurance device 20 of the mobile phone. Therefore, when the mobile phone endurance device 20 is not worn at ordinary times, the charging terminal pin and the charging terminal of the first external interface are isolated and uncharged, so that the reliability of the circuit is ensured.

In one implementation, as shown in fig. 9, the handset main body apparatus further includes a second external interface 104; the second external interface 104 is capable of connecting with an external device; the handset main body device 10 can be charged through the second external interface 104;

wherein, the third terminal of the power switch unit U2 and the power pin of the second external interface 104

USB _ VBUS connection;

the power switch unit U2 is further configured to, when the first external interface 103 and the second external interface 104 are both suspended, keep a path between the second terminal of the power switch unit U2, the third terminal of the power switch unit U2, and the first terminal of the power switch unit U2 disconnected;

the power switch unit U2 is further configured to, after detecting that one of the first external interface 103 or the second external interface 104 is connected to another device, turn on a path between the first end of the power switch unit U2 and a corresponding terminal pin of the power switch unit U2; the corresponding terminal pin includes: one of the second terminal of the power switching unit U2, the third terminal of the power switching unit U2.

For example, in fig. 9, after the first external interface 103 is connected to the cellular phone endurance device 20, the first terminal and the second terminal of the power switch unit U2 are conducted, so that the cellular phone main body device 10 can be charged through the first external interface 103. When the second external interface 104 is connected to an external device, the first terminal and the third terminal of the power switch unit U2 are conducted, so that the handset main body device 10 can be charged through the second external interface 104.

Specifically, in the embodiment of the present invention, the first external interface 103 may be the first thimble contact interface shown above, and the second external interface 104 may be a USB, a Micro-USB, or a Type-C interface.

In the embodiment of the present invention, when there are two external interfaces of the mobile phone, if the power pins of the two external interfaces are directly connected to the first charging circuit 105, the situation that one of the external interfaces is connected to the external device and the other external interface is also electrified may occur. Furthermore, in the embodiment of the present invention, by setting the power switch unit U2, only one power pin of the external interface is connected to the first charging circuit 105 at the same time, so as to avoid the situation that the external interface is electrified.

Specifically, in the embodiment of the present invention, the third protection circuit U2 may determine whether the first external interface 103 and the second external interface 104 are connected to each other by detecting the voltage of the second terminal and the third terminal of the power switch unit U2.

By the above manner, it is not necessary for the PMIC or the CPU of the handset main apparatus 10 to specially send a control signal to the power switch unit U2 to switch the corresponding channel after detecting the trigger signal of the DET pin or the USB _ ID pin.

In one implementation, as shown in fig. 9, the handset main body device 10 further includes a USB switch unit U3. Also included on the first external interface 103 are data transfer pins, such as the USB _ D + pin and the USB _ D-pin of table 1 above. The data transmission terminal pin is used for connecting to the data terminal pin on the fourth external interface 203 on the cellular phone cruising device 20. Specifically, as shown in fig. 9, the data transmission terminal pin USB _ D +, USB _ D-is connected to the fourth external interface 203 on the cellular phone cruising device 20 through the third external interface 202.

The USB switch unit U3 is connected to the first external interface 103 and the second external interface 104, respectively.

And the USB switching unit U3 is configured to select one of the first external interface 103 and the second external interface 104 according to a preset manner, and perform a data interaction task of the mobile phone.

In the above embodiment of the present invention, it is considered that after the cellular phone continuation device 20 is installed, the transmission interface (i.e. the second external interface 104) of the cellular phone main body device 10 may be blocked by the cellular phone continuation device 20, and thus is inconvenient to use. For example, in the above example, after the cellular phone duration device 20 is attached to the cellular phone main body device 10, the second external interface 104 on the cellular phone main body device 10 is covered by the edge of the cellular phone duration device 20. Therefore, in the present invention, by providing the USB switch unit U3 in the handset main device 10, after the handset cruising device 20 is installed, the data interaction task can be completed by using the second USB interface on the handset cruising device 20.

In one implementation, as shown in fig. 9, in the handset main body device 10, the first external interface 103 further includes a DET detection pin and an EN enable pin.

When the DET detection pin receives the preset signal, the mobile phone main body device 10 determines that the first external interface 103 is coupled to the third external interface 202 on the mobile phone cruising device 20;

after determining that the first external interface 103 is coupled to the third external interface 202, the main device 10 of the mobile phone sends an enable signal to the endurance device 20 through the EN enable pin, so that the endurance device 20 of the mobile phone outputs an external power voltage to the charging terminal through the charging pin VBUS of the first external interface 103 and through the power switch unit U2 in response to the enable signal, and charges the main device 10 of the mobile phone.

In one implementation, as shown in fig. 9, the first external interface 103 further includes an HDQ communication terminal pin; the mobile phone main device 10 obtains the power information of the mobile phone endurance device 20 through the HDQ communication terminal pin. So as to display the power information of the mobile phone endurance device 20 on the interface of the mobile phone main body device 10.

In one embodiment, in order to detect the connection between the external interface and another external device in time, pins that are continuously powered are often required to be provided on the external interface for implementing a corresponding detection function. For example, in the pin definitions of the first external interface of the handset body device 10 shown in table 1:

the HDQ, USB _ ID, and DET pins may be pins with detection functions. Therefore, in the case of no external device, the pins also need to be kept in a high state, so that the voltage level is pulled down after the external device is connected, and a corresponding operation is performed.

When water stains cover the pins and the GND pin, when the voltage between the pins and the GND pin is larger than 1.2V (namely water ionization voltage), the pins are corroded, oxidized and short-circuited. In addition, when the external interface is an electric contact thimble interface, the contact and the thimble are likely to be short-circuited when contacting with a conductive substance such as metal, so that the device may be out of order.

In general, the Micro-USB or Type-C interface adopted by the existing mobile phone is in a structural design, and the interface is arranged in a sunken cavity of the equipment. The above problem is not yet obvious. However, in the above embodiments of the present invention, the first external interface 103 and the third external interface 202 on the handset main body device 10 and the handset cruising device 20 may adopt the structure form of the thimble contact interface. In a thimble contact interface, the electrical contacts are exposed and often come into contact with the user's skin, thus increasing the likelihood of corrosion, oxidation, shorting, etc. of the pins.

In view of the above problems, in the embodiment of the present invention, it is thought that a protection circuit may be disposed between a detection pin that needs to maintain a high level state at ordinary times and a pin of an external interface, and the pin voltage of the external interface is lower than the voltage of the high level state through the protection circuit, in consideration of the fact that the circuit needs to be redesigned and the cost is high by changing the level value of the high level state of the original circuit in the mobile phone. And further, the pin voltage of the external interface is kept below 1.2V, so that the corrosion of the pin is avoided. Meanwhile, when an external device is connected, the protection circuit can also pull down the voltage of the detection pin in time so as to enable the mobile phone to trigger corresponding functions.

Based on the above inventive principle, as shown in fig. 10, the mobile phone main body device 10 according to the embodiment of the present invention further includes a first pin and a first protection circuit 106, as shown in fig. 2; the first pin is connected to a first end of the first protection circuit 106, and a second end of the first protection circuit 106 is connected to a preset pin on the first external interface 103.

The first protection circuit 106 is configured to keep the first pin in a high level state when the first external interface 103 is not connected to an external device, and make a voltage of a preset pin on the first external interface 103 lower than a voltage value in the high level state; and after the first external interface 103 is connected to an external device, the voltage of the second terminal of the first protection circuit 106 is pulled low, so that the voltage of the first pin changes to a low level state.

In the embodiment of the invention, the first protection circuit is arranged between the first pin of the mobile phone main body device and the first external interface, and can keep the first pin in a high level state under the condition that the first external interface is not connected with an external device, and the voltage of the preset pin connected with the first protection circuit on the first external interface is lower than the voltage value in the high level state, so that the problem that the preset pin is corroded and oxidized due to overhigh voltage under the condition that the external device is not connected is avoided. In addition, the first protection circuit can pull down the voltage of the second end of the first protection circuit after the first external interface is connected with the external device, so that the voltage of the first pin is changed into a low level state. Therefore, after the mobile phone main body device is connected with the external device, the connection condition of the external device can be detected according to the high-low level change of the voltage of the first pin, and then corresponding operation is triggered. Furthermore, the problem that the external interface is corroded and oxidized can be effectively prevented on the premise that the detection function of the first pin is ensured.

In one implementation manner, as shown in fig. 11, in order to enable the first protection circuit 106 to implement the above functions, in an embodiment of the present invention, the first protection circuit 106 specifically includes:

the circuit comprises a first resistor unit R1, a second resistor unit R2 and a triode unit Q1.

One end of the first resistor unit R1 is connected to a dc power supply (in the figure, the dc power supply is set to 1.8V for example), and the other end is connected to the first pin; the first pin is also connected with a collector of a triode unit Q1; the emitter of the triode unit Q1 is connected to a preset pin (specifically, the USB _ ID pin shown in fig. 11); the emitter of the transistor unit Q1 is also connected to ground through a second resistor unit R2.

When the first external interface 103 is not connected with an external device, the triode unit Q1 works in an amplification region; after the first external interface 103 is connected to an external device, the emitter voltage of the transistor unit Q1 is pulled low, so that the transistor unit Q1 operates in a saturation region.

It should be noted that, in one implementation, the first pin may be a GPIO pin of the processor chip, and the first resistance unit R1 may be embedded in the processor chip.

In one implementation, in order to operate the transistor unit Q1 in the amplification region when the first external interface 103 is not connected to an external device; after the first external interface 103 is connected to an external device, the emitter voltage of the transistor unit Q1 is pulled low, so that the transistor unit Q1 operates in a saturation region. Further, as shown in fig. 11, in the embodiment of the present invention, the first protection circuit 106 further includes: a third resistance unit R3 and a fourth resistance unit R4.

One end of the third resistor unit R3 is connected with a direct current power supply, and the other end is connected with the base electrode of the triode unit Q1; one end of the fourth resistor unit R4 is connected to the base of the transistor unit Q1, and the other end is grounded.

In the above embodiment of the present invention, the base of the triode unit Q1 is connected to a voltage divider circuit, so that the Q1 works in the amplification region when the first external interface 106 is not connected to an external device, i.e., when the preset pin is suspended, by adjusting resistance values of the resistors R1, R2, R3, and R4, so that the voltage at the first pin is in a high level state. After the external device is connected, the voltage of the emitter of the Q1 is pulled low, so that the Q1 is conducted, and the first pin is changed into a low level state to trigger the corresponding interrupt operation.

Wherein, first pin specifically includes: one of the USB _ ID pin or the DET pin.

In addition, the mobile phone cruising device 20 can be used in combination with the mobile phone main body device 10. As shown in fig. 11, the cellular phone endurance device 20 includes a second detecting terminal, a fifth resistor R5, and a sixth resistor R6; the mobile phone endurance device 20 executes a preset operation after the voltage of the second detection pin is reduced.

As shown in fig. 11, the second detection pin may be a USB _ ID pin.

The second detection terminal pin is connected with the third external interface 202; one end of the fifth resistor unit R5 is connected with a direct current power supply Vreg, and the other end is connected with the second detection terminal pin; one end of the sixth resistance unit R6 is connected with the second detection terminal pin, and the other end is grounded;

when the third external interface 202 is connected to the first external interface 103, the second detection pin is connected to the second end of the first protection circuit 106.

As shown in fig. 11, the cellular phone cruising device 20 further includes: and a single chip microcomputer 204. The single chip microcomputer 204 controls the mobile phone cruising device 20 to execute the preset operation after the voltage of the second detection terminal pin is reduced.

Specifically, in fig. 11, the second detection pin is a USB _ ID pin, the USB _ ID pin of the main body device 10 of the mobile phone is a waterproof circuit, the voltage of the USB _ ID pin of the main body device 10 of the mobile phone is adjusted to be within 1.2V in a suspended state (in this example, the pull-up dc power supply is 1.8V, the USB _ ID is about 0.6V, R3 is 100K, R4 is 150K, and R2 is 100K), the USB _ ID pin of the cruising device 20 of the mobile phone is a voltage divider circuit, the voltage divider resistor is adjusted to have a voltage value within 1.2V (in this example, Vreg is 3.1V, R5 is 1M, R6 is 510K, and the voltage divider value is about 1V), the detection threshold of the single chip microcomputer 204 (in this example, 0.8V) is set, when the main body device 10 of the mobile phone is not connected, the ADC detection value is greater than the detection threshold, and when the main body device 10 of the mobile phone is connected, the detection value is smaller than the ADC detection threshold.

In one implementation, as shown in fig. 12, the mobile phone main body device 10 according to the embodiment of the present invention further includes a second protection circuit 107; the second protection circuit 107 is connected to the HDQ pin of the first external interface 103.

The second protection circuit 107 is used for applying a pull-up level to the HDQ pin after the first external interface 103 is connected to an external device.

In addition, as shown in fig. 12, in one implementation, the HDQ pin is connected to a general purpose input/output interface GPIO of the CPU of the handset main body device 10 to implement the function of single bus communication.

In the embodiment of the invention, the existing HDQ protocol adopts a single bus communication mode, the output is open-drain output, so that a terminal pin needs to be pulled up to a high level state by default, and then a low level interrupt signal of a plurality of cycles needs to be input for communication. Therefore, on the external interface of the current mobile phone, the HDQ pin using the HDQ protocol usually maintains a high level state by default. Therefore, in order to ensure that the pin of the external interface does not corrode or oxidize, in the embodiment of the present invention, the second protection circuit 107 is connected to the HDQ pin, so that after the first external interface is connected to the external device, the second protection circuit 107 pulls up the level of the HDQ pin, so that the HDQ pin can receive the terminal signal of the external device.

Specifically, as shown in fig. 13, the second protection circuit 107 specifically includes: LDO (low dropout regulator), and a seventh resistor unit R7.

The control end of the LDO is connected with the CPU, the input end of the LDO is connected with the DC power supply Vin, and the output end of the LDO is connected with the HDQ pin through R7.

After the mobile phone main body device 10 is connected to an external device through the first external interface 103, the CPU sends a preset enable signal to the LDO, so that the LDO pulls up the level of the HDQ pin.

Specifically, in one implementation, after the main device 10 of the mobile phone is connected to an external device, the first pin shown in fig. 11 generates a low-level interrupt, so that the main device 10 of the mobile phone detects the access of the external device. After detecting that the first external interface 103 of the mobile phone main body device 10 is connected to an external device in the above manner, the CPU sends an enable signal to the LDO, thereby pulling up the level state of the HDQ pin of the first external interface 103 to receive an interrupt signal.

For example, in the structural schematic diagram of the mobile phone 01 shown in fig. 9, the first protection circuit 106 provided in the above embodiment of the present invention specifically includes the first protection circuit 106a connected to the DET pin and the first protection circuit 106b connected to the USB _ ID pin in fig. 9, and the second protection circuit 107 includes the second protection circuit 107 connected to the HDQ pin. The specific connection relationship is shown in the figure, and the functions can be achieved by referring to the description above, which is not repeated.

In one embodiment, the first charging circuit 105 is used for charging the handset main body device 10 by using an external power supply.

For example, as shown in fig. 6, the first charging circuit 105 may include a converting unit 1051 and a charging control unit 1052. For the functional implementation process of the first charging circuit 105, reference may be made to the above description.

In one embodiment, the first charging circuit 105 controls the magnitude of the current input to the mobile phone main body 10 according to the temperature of the mobile phone 01 when the mobile phone main body 10 is charged by the external power supply.

Specifically, the temperature of the mobile phone 01 may be the temperature of the mobile phone main body device 10.

Specifically, to achieve the above effect, in one implementation, the conversion unit 1051 is specifically configured to control the magnitude of the current output from the output terminal of the conversion unit 1051 according to the temperature of the mobile phone 01.

In one implementation, the first charging circuit 105 is specifically configured to control the current input to the mobile phone body apparatus 10 not to exceed a first current threshold when the temperature of the mobile phone 01 exceeds a first temperature threshold;

when the temperature of the mobile phone 01 exceeds a second temperature threshold, controlling the current input into the mobile phone main body device 10 not to exceed the second current threshold; wherein the first temperature threshold is less than the second temperature threshold, and the first current threshold is greater than the second current threshold.

In the embodiment of the invention, the current value for charging the mobile phone can be adjusted according to the temperature of the mobile phone. Therefore, the effects of prolonging the service life of the mobile phone battery and ensuring the safety of the mobile phone during operation are achieved.

In one embodiment, as shown in fig. 9, the cellular phone endurance device 20 further includes: a fourth external interface 203, a third protection circuit 205;

wherein, the power pin of the third external interface 202 is connected to the power pin of the fourth external interface 203 through the third protection circuit 205;

the third protection circuit 205 is configured to, when it is detected that the third external interface 202 is connected to the first external interface 103, turn on a path between the power pin of the fourth external interface 203 and the power pin of the third external interface 202.

wherein, the power pin of the third external interface 202 is connected to the power pin VBUS of the fourth external interface 203 through the third protection circuit 205;

the third protection circuit 205 is configured to, when it is detected that the third external interface 202 is connected to the first external interface 103, turn on a path between the power pin VBUS of the fourth external interface 203 and the power pin of the third external interface 202.

In the embodiment of the present invention, it is considered that when the cellular phone cruising device 20 is charged through the fourth external interface 203, in order to ensure that the cellular phone main body device 10 is charged at the same time, the power terminal of the fourth external interface 203 needs to be connected to the power terminal of the third external interface 202. However, if the mobile phone main body apparatus 10 is not connected at this time, the power terminal pin of the third external interface 202 is charged. Especially, when the third external interface is a thimble contact interface, potential safety hazards can be caused by electrification of contact pins. Therefore, in the embodiment of the present invention, the third protection circuit 205 is disposed between the power pin of the fourth external interface 203 and the power pin VBUS of the third external interface 202, so as to avoid the above problem.

The following describes the operation of the mobile phone body device 10 and the mobile phone cruising device 20 with reference to fig. 9:

if the mobile phone cruising device 20 is independently supplied, the charger is connected to the mobile phone cruising device 20 through the fourth external interface 203 of the mobile phone cruising device 20, and when the charger independently charges the mobile phone cruising device 20, the charging circuit thereof is as shown in fig. 14 and 15, wherein fig. 14 is a battery front-end circuit of the mobile phone cruising device 20, and fig. 15 is a battery charging chip circuit of the mobile phone cruising device 20. The specific charging process is that the charging current flows through the fourth external interface 203, the battery front-end charging circuit of the mobile phone endurance device 20, is output through the VO port, and finally flows into the second battery through VBAT + by flowing into the battery charging chip circuit of the mobile phone endurance device 20 connected with the VO, so as to complete the charging process of the battery of the mobile phone endurance device 20. When the charging and control circuit in fig. 9 receives the VBUS insertion interrupt, it charges according to 5V/2A.

A structure diagram of the third protection circuit 205 is shown in a dashed-line frame portion of fig. 14.

After the main device 10 of the mobile phone is combined with the cruising device 20 of the mobile phone, the charger is inserted into the fourth external interface 203 of the cruising device 20 of the mobile phone, and the single chip 204 automatically turns on the Q3 after detecting that the cruising device 20 of the mobile phone is connected through the USB _ ID pin. After the power switch unit U2 detects the access of the external device, the first end of the power switch unit U2 is automatically opened to the third external interface 202 of the cellular phone cruise control device 20. When the processor U4 detects the access of the cell phone cruising device 20 through the DET terminal pin, the USB switch unit U3 is automatically switched to the cell phone cruising device 20. And the U1 receives VBUS insertion interruption to detect the charging type, and if the charging type is a common 5V charger, the charging is carried out according to 5V/2A, and if the charging type is detected to be an intelligent high-voltage charger (PE2.0 or QC3.0), the charging type is high-voltage charging.

When the mobile phone endurance device 20 is connected to the mobile phone main body device 10, and the mobile phone main body device 10 enables the output of the mobile phone endurance device 20, VBUS is connected to the mobile phone 10 for detecting the charging type, if the mobile phone main body device 10 detects that the charging type is non-standard charging and the mobile phone endurance device 20 is connected, and the battery level of the mobile phone main body device 10 is lower than a threshold q1 (15% in this example), the mobile phone endurance device 20 charges the mobile phone main body device 10, and when the charging type is higher than q2 (30% in this example), the mobile phone main body device 10 turns off the charging function, i.e. turns off the path for charging the first battery 102 of the mobile phone main body device 10, and only supplies power to the electric load 101, the VBUS input current is equal to the system power consumption, and the current is greatly reduced compared with the charging current (about 400mA on average in this example, about 1500mA on average, and at this time, the voltage difference of the buck circuit is VBUS-VPH _ PWR, which is lower than the voltage difference of VBUS-VBAT (the voltage of VBAT is from 3V to 4.4V), so that the power supply efficiency is improved.

In the embodiments provided by the present invention, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A mobile phone is characterized by comprising a mobile phone main body device and a mobile phone endurance device; the mobile phone main body device comprises a first battery and an electricity load; the mobile phone endurance device comprises: a second battery; the first battery is used for supplying power to the power load;

the mobile phone main body device is provided with a first external interface, and the mobile phone endurance device is provided with a third external interface; the first external interface is connected with the electric load;

the mobile phone main body device can be detachably fixed with the mobile phone endurance device; when the mobile phone main body device and the mobile phone endurance device are detachably fixed, the first external interface is coupled with the third external interface, so that the second battery is used for charging the first battery, and/or the second battery is used for supplying power to the electric load.

2. The handset according to claim 1, wherein the first external interface comprises a first pin contact interface provided on the handset body device, and the third external interface comprises a second pin contact interface provided on the handset duration device.

3. The handset according to claim 1, wherein the handset main body device further comprises a second external interface, and the handset cruising device further comprises a fourth external interface; the second external interface and the fourth external interface can be connected with an external device respectively;

the mobile phone main body device can be charged through the second external interface, and the mobile phone endurance device can be charged through the fourth external interface.

4. The mobile phone of any one of claims 1-3, wherein the mobile phone body device further comprises a first charging circuit; the first charging circuit includes: a conversion unit and a charging control unit; wherein,

the input end of the conversion unit is connected with the charging end of the mobile phone main body device, and the output end of the conversion unit is respectively connected with the input end of the charging control unit and the power supply input end of the power load; the output end of the charging control unit is connected with the first battery;

the conversion unit is used for reducing the voltage accessed from the charging end of the mobile phone main body device, outputting the voltage from the output end of the conversion unit so as to supply power to the power load, and charging the first battery through the charging control unit;

and the charging control unit is used for disconnecting a path between the input end and the output end of the charging control unit after a preset condition is met, and stopping charging the first battery through the charging control unit.

5. The mobile phone of claim 4, wherein the charging control unit is specifically configured to disconnect a path between the input terminal and the output terminal of the charging control unit when detecting that an external device connected to the mobile phone main body device is a mobile power supply and detecting that the power of the first battery is greater than a power threshold.

6. The mobile phone of claim 4, wherein the charging control unit is specifically configured to disconnect a path between the input terminal and the output terminal of the charging control unit when a preset operation of a user is detected.

7. The mobile phone of claim 1, wherein the mobile phone body device further comprises: a power switching unit;

the first end of the power switch unit is connected with the charging end, and the second end of the power switch unit is connected with the charging end pin of the first external interface;

the power switch unit is configured to conduct a power pin of the first external interface and the charging terminal when the first external interface is coupled with the third external interface.

8. The handset according to claim 7, wherein the handset body means further comprises a second external interface; the second external interface is connectable with an external device; the mobile phone main body device can be charged through the second external interface;

the third end of the power switch unit is connected with the power terminal pin of the second external interface;

the power switch unit is further configured to keep a path between the second end of the power switch unit, the third end of the power switch unit, and the first end of the power switch unit disconnected when the first external interface and the second external interface are both suspended;

the power switch unit is further configured to conduct a path between a first end of the power switch unit and a corresponding terminal pin of the power switch unit after detecting that one of the first external interface or the second external interface is connected to another device; the corresponding terminal pin includes: one of a second terminal of the power switching unit and a third terminal of the power switching unit.

9. The handset of claim 1, wherein the first external interface further comprises a first detection pin and an enable pin;

when the first detection terminal pin receives a preset signal, the mobile phone main body device determines that the first external interface is coupled with the third external interface on the mobile phone endurance device;

after the mobile phone main body device determines that the first external interface is coupled with the third external interface, an enabling signal is sent to the mobile phone endurance device through the enabling terminal pin, so that the mobile phone endurance device responds to the enabling signal and charges the mobile phone main body device through the charging terminal pin of the first external interface.

10. The handset according to claim 1, wherein the first external interface further comprises a communication terminal pin;

the mobile phone main body device acquires the electric quantity information of the mobile phone endurance device through the communication terminal pin;

the mobile phone main body device is also used for displaying the electric quantity information on a display interface of the mobile phone main body device after acquiring the electric quantity information of the mobile phone endurance device.

11. The mobile phone of claim 1, wherein the mobile phone body device further comprises a first pin and a first protection circuit; the first pin is connected with a first end of the first protection circuit, and a second end of the first protection circuit is connected with a preset pin on the first external interface;

the first protection circuit is configured to keep the first pin in a high level state when the first external interface is not connected to an external device, and enable a voltage of a preset pin on the first external interface to be lower than a voltage value of the high level state; and after the first external interface is connected with an external device, the voltage of the second end of the first protection circuit is pulled down, so that the voltage of the first pin is changed into a low level state.

12. The cellular phone of claim 11, wherein the first protection circuit comprises: the circuit comprises a first resistance unit, a second resistance unit and a triode unit;

one end of the first resistance unit is connected with a direct-current power supply, and the other end of the first resistance unit is connected with the first pin; the first pin is also connected with a collector of the triode unit; an emitter of the triode unit is connected to the preset pin; the emitter of the triode unit is also grounded through the second resistor unit; when the first external interface is not connected with an external device, the triode unit works in an amplification area; after the first external interface is connected with an external device, the voltage of an emitting electrode of the triode unit is pulled down, so that the triode unit works in a saturation region.

13. The handset according to claim 12,

the first protection circuit further includes: a third resistance unit and a fourth resistance unit;

one end of the third resistance unit is connected with a direct-current power supply, and the other end of the third resistance unit is connected with the base electrode of the triode unit; one end of the fourth resistance unit is connected with the base electrode of the triode unit, and the other end of the fourth resistance unit is grounded.

14. The mobile phone according to any one of claims 11 to 13, wherein the first pin specifically includes: one of the USB _ ID pin or the DET pin.

15. The mobile phone of claim 1, wherein the mobile phone body device further comprises a second protection circuit; the second protection circuit is connected with the HDQ pin of the first external interface;

the second protection circuit is used for applying a pull-up level to the HDQ pin after the first external interface is connected with an external device.

16. The mobile phone of claim 1, wherein the mobile phone body device comprises a first charging circuit; the first charging circuit is used for charging the mobile phone main body device by utilizing an external power supply

The first charging circuit is used for controlling the current input into the mobile phone main body device according to the temperature of the mobile phone when the mobile phone main body device is charged by an external power supply.

17. The handset according to claim 16,

the first charging circuit is specifically used for controlling the current input into the mobile phone main body device not to exceed a first current threshold when the temperature of the mobile phone exceeds a first temperature threshold;

when the temperature of the mobile phone exceeds a second temperature threshold, controlling the current input into the mobile phone main body device not to exceed a second current threshold; wherein the first temperature threshold is less than the second temperature threshold, and the first current threshold is greater than the second current threshold.

18. The mobile phone of claim 12 or 13, wherein the mobile phone endurance device comprises a second detection terminal pin, a fifth resistance unit, and a sixth resistance unit; the mobile phone endurance device executes preset operation after the voltage of the second detection terminal pin is reduced;

the second detection terminal pin is connected with the third external interface; one end of the fifth resistance unit is connected with a direct-current power supply, and the other end of the fifth resistance unit is connected with the second detection terminal pin; one end of the sixth resistance unit is connected with the second detection terminal pin, and the other end of the sixth resistance unit is grounded;

when the third external interface is connected to the first external interface, the second detection terminal pin is connected to the second end of the first protection circuit.

19. The mobile phone of claim 1, wherein the means for sustaining a mobile phone further comprises: a fourth external interface, a third protection circuit;

the power supply terminal pin of the third external interface is connected with the power supply terminal pin of the fourth external interface through the third protection circuit;

and the third protection circuit is used for conducting a path between a power supply terminal pin of the fourth external interface and a power supply terminal pin of the third external interface after detecting that the third external interface is connected with the first external interface.

20. The mobile phone of claim 1, wherein the main body device is capable of being embedded into the endurance device to fix the positions of the main body device and the endurance device.

21. A mobile phone body device is characterized by comprising a first battery and a power load; a first external interface is arranged on the mobile phone main body device;

the mobile phone main body device can be detachably fixed with the mobile phone endurance device; the mobile phone endurance device comprises: a second battery; a third external interface is arranged on the mobile phone cruising device;

when the mobile phone main body device and the mobile phone endurance device are detachably fixed, the first external interface is coupled with the third external interface, so that the second battery is used for charging the first battery, and/or the second battery is used for supplying power to the electric load.

22. The handset body apparatus according to claim 21, wherein the first external interface comprises a first thimble contact interface provided on the handset body apparatus; the first thimble contact interface is used for being connected with a second thimble contact interface serving as the third external interface.

23. The handset body apparatus according to claim 21, wherein the handset body apparatus further comprises a second external interface; the second external interface is connectable with an external device;

the mobile phone main body device can be charged through the second external interface.

24. The handset body apparatus according to any one of claims 21 to 23, further comprising a first charging circuit; the first charging circuit includes: a conversion unit and a charging control unit; wherein,

25. The device as claimed in claim 24, wherein the charging control unit is configured to disconnect a path between the input terminal and the output terminal of the charging control unit when detecting that the external device connected to the device is a mobile power source and detecting that the power of the first battery is greater than a power threshold.

26. The device as claimed in claim 24, wherein the charging control unit is configured to disconnect a path between the input terminal and the output terminal of the charging control unit when detecting a preset operation by a user.

27. The handset body apparatus according to claim 21, further comprising: a power switching unit;

28. The handset body apparatus according to claim 27, further comprising a second external interface; the second external interface is connectable with an external device; the mobile phone main body device can be charged through the second external interface;

29. The handset body apparatus of claim 21 wherein the first external interface further comprises a first detection pin and an enable pin;

30. The handset body means of claim 21 wherein said first external interface further comprises a communication terminal pin;

31. The handset body device according to claim 21, further comprising a first pin, a first protection circuit; the first pin is connected with a first end of the first protection circuit, and a second end of the first protection circuit is connected with a preset pin on the first external interface;

32. The handset body apparatus according to claim 31, wherein the first protection circuit comprises: the circuit comprises a first resistance unit, a second resistance unit and a triode unit;

33. The handset body apparatus according to claim 32,

34. The handset body device according to any one of claims 31 to 33, wherein the first pin specifically comprises: one of the USB _ ID pin or the DET pin.

35. The handset body apparatus according to claim 21, further comprising a second protection circuit; the second protection circuit is connected with the HDQ pin of the first external interface;

36. The handset body device according to claim 21, wherein the handset body device comprises a first charging circuit; the first charging circuit is used for charging the mobile phone main body device by utilizing an external power supply;

the first charging circuit is used for controlling the current input into the mobile phone main body device according to the temperature of the mobile phone main body device when the mobile phone main body device is charged by an external power supply.

37. The handset body device according to claim 36,

the first charging circuit is specifically used for controlling the current input into the mobile phone main body device not to exceed a first current threshold when the temperature of the mobile phone main body device exceeds a first temperature threshold;

and when the temperature of the mobile phone main body device exceeds a second temperature threshold, controlling the current input into the mobile phone main body device not to exceed a second current threshold.

38. The device as claimed in claim 21, wherein the device can be inserted into the device to fix the positions of the device.

39. A mobile phone cruising device, comprising: a second battery; a third external interface is arranged on the mobile phone cruising device;

the mobile phone endurance device can be detachably fixed with the mobile phone main body device; the mobile phone comprises a mobile phone main body device, a first battery and a power utilization load, wherein the mobile phone main body device comprises the first battery and the power utilization load; a first external interface is arranged on the mobile phone main body device;

40. The cellular phone endurance device of claim 39, in which the third external interface comprises a second thimble contact interface disposed on the cellular phone endurance device; the second thimble contact interface is used for being connected with the first thimble contact interface of the first external interface.

41. The cellular phone endurance device of claim 39, further comprising a fourth external interface; the fourth external interface is connectable with an external device;

the mobile phone endurance device can be charged through the fourth external interface.

42. The cellular phone endurance device of claim 39, further comprising: a fourth external interface, a third protection circuit;

43. The cellular phone endurance device of claim 39, in which the cellular phone body device is capable of being embedded into the cellular phone endurance device to fix the positions of the cellular phone body device and the cellular phone endurance device.