Mobile terminal

Abstract

The present invention discloses a mobile terminal, comprising: a charging interface and a small board; the charging interface is connected to the small board, or the charging interface is provided on the small board; the mobile terminal further comprises: a charging processing circuit, a battery assembly, a first connector and a second connector; the charging processing circuit is arranged on the small board, and the input end of the charging processing circuit is connected to the charging interface; the first end of the first connector is connected to the charging processing circuit, and the second end is connected to the positive electrode of the battery assembly; the negative electrode of the battery assembly is connected to the second connector. The mobile terminal can shorten the charging path and reduce the path impedance through two connectors, so as to improve the charging efficiency while reducing the heat generation of the charging path and enhancing the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile terminals, and particularly to a mobile terminal. Background Art

[0002] With the continuous popularization of mobile terminals, people's charging requirements for the battery components of mobile terminals are getting higher and higher. In related technologies, taking a mobile phone as an example of a mobile terminal, the battery components are usually assembled in the Figure 1 shown manner.

[0003] As Figure 1 can be seen, when the battery component is charging, the charging current passes through the USB port of the mobile phone, passes through the flexible printed circuit board (Flexible Printed Circuit, abbreviated as FPC), and then enters the battery component through the positive connection terminal of the connector, and then returns to the USB through the negative connection terminal and the FPC in the connector.

[0004] It can be seen from this that the charging path from the USB port to the battery component is relatively long. When a large current passes through, the path loss is large and the connection terminals of the connector heat up severely, resulting in low charging efficiency and heat generation in the entire charging path. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems in the related technologies to some extent. To this end, the object of the present invention is to propose a mobile terminal that can shorten the charging path and reduce the path impedance, so as to improve the charging efficiency while reducing the heat generation in the charging path and improving the user experience.

[0006] To achieve the above object, an embodiment of the present invention proposes a mobile terminal, including: a charging interface, the charging interface is connected to a small board or the charging interface is provided on the small board; the mobile terminal further includes: a charging processing circuit, a battery component, a first connector, and a second connector; the charging processing circuit is provided on the small board, and the input end of the charging processing circuit is connected to the charging interface; the first end of the first connector is connected to the output end of the charging processing circuit, and the second end is connected to the positive electrode of the battery component; the negative electrode of the battery component is connected to the second connector.

[0007] According to the mobile terminal of the embodiment of the present invention, when the first connector is correspondingly connected to the positive electrode of the battery component and the second connector is correspondingly connected to the negative electrode of the battery component, and then the battery component is charged, the charging current sequentially passes through the charging interface, the charging processing circuit, the first connector, and the battery component. Thus, the mobile terminal can shorten the charging path and reduce the path impedance through the two connectors, so as to improve the charging efficiency while reducing the heat generation in the charging path and improving the user experience.

[0008] In addition, the mobile terminal according to the above embodiments of the present invention may further have the following additional technical features:

[0009] According to an embodiment of the present invention, the battery assembly includes a battery cell and a battery protection board; the distance between the battery protection board and the small board is less than the distance between the battery cell and the small board.

[0010] According to an embodiment of the present invention, the first connector is disposed on a side adjacent to the small board and the battery protection board; the second connector is disposed on a side adjacent to the small board and the battery protection board.

[0011] According to an embodiment of the present invention, the second end of the first connector is connected to the positive electrode of the battery assembly through a first flexible circuit board; the negative electrode of the battery assembly is connected to the first end of the second connector through a second flexible circuit board.

[0012] According to an embodiment of the present invention, the mobile terminal further includes: a third flexible circuit board and a main board; the first end of the third flexible circuit board is respectively connected to the first end of the first connector and the second end of the second connector; the second end of the third flexible circuit board is connected to the power supply terminal of the main board.

[0013] According to an embodiment of the present invention, the charging processing circuit includes a first voltage conversion circuit and a second voltage conversion circuit connected in parallel; the small board further includes a control circuit; the first output end of the control circuit is connected to the control end of the first voltage conversion circuit; the second output end of the control circuit is connected to the control end of the second voltage conversion circuit; the first input end of the control circuit is connected to the charging interface, and is used to control the working state of the first voltage conversion circuit and / or the second voltage conversion circuit according to the charging current of the charging interface.

[0014] According to an embodiment of the present invention, the small board further includes a temperature detection circuit; the output end of the temperature detection circuit is connected to the second input end of the control circuit; the control circuit is further used to control the working state of the first voltage conversion circuit and / or the second voltage conversion circuit according to the output signal of the temperature detection circuit.

[0015] According to an embodiment of the present invention, the control circuit is specifically used for: when the charging current is less than a first threshold value, or the output signal of the temperature detection circuit is used to indicate that the temperature detected by the temperature detection circuit exceeds a temperature threshold value, controlling to turn off the first voltage conversion circuit and start the second voltage conversion circuit.

[0016] According to an embodiment of the present invention, the first voltage conversion circuit is any one of the following circuits: a switched-capacitor voltage converter, a metal-oxide-semiconductor field-effect transistor.

[0017] According to an embodiment of the present invention, the second voltage conversion circuit is a DC voltage converter.

[0018] According to an embodiment of the present invention, the number of the battery cells can be multiple.

[0019] According to an embodiment of the present invention, the number of the first connector and / or the second connector is more than one. Description of the Drawings

[0020] Figure 1 is a structural block diagram of a mobile terminal in the related art;

[0021] Figure 2 is a structural block diagram of a mobile terminal according to an embodiment of the present invention;

[0022] Figure 3 is a structural block diagram of a mobile terminal according to an embodiment of the present invention;

[0023] Figure 4 is a structural schematic diagram of a mobile terminal according to an example of the present invention;

[0024] Figure 5 is a structural schematic diagram of a mobile terminal according to another example of the present invention;

[0025] Figure 6 is a structural schematic diagram of a charging processing circuit and a small board according to an example of the present invention;

[0026] Figure 7 is a structural schematic diagram of a mobile phone according to an example of the present invention. Detailed Embodiments

[0027] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0028] It should be noted that in the mobile terminal of the related art, in order to reduce the path impedance to improve the charging efficiency, the charging path is usually optimized by reducing the impedance values of the respective devices on the charging path. For example, the main board trace of the charging line is widened. However, the above technical solution only optimizes the path impedance from the perspective of the impedance values of the devices, and the widening of the charging line is limited by the area of the main board, resulting in a relatively low degree of improvement in the charging efficiency.

[0029] Therefore, the present invention provides a mobile terminal to solve the problems of long charging path, low charging efficiency, and overheating of the whole machine when the existing mobile terminal is charged. The mobile terminal proposed according to the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0030] Figure 2 is a structural block diagram of a mobile terminal according to an embodiment of the present invention. As Figure 1 shown, the mobile terminal includes: a charging interface 10, a small board 20, a charging processing circuit 30, a first connector 40, a battery assembly 50, and a second connector 60.

[0031] Among them, the charging interface 10 is connected to the small board 20, or the charging interface is disposed on the small board 20; the charging processing circuit 30 is disposed on the small board 20, and the input end of the charging processing circuit 30 is connected to the charging interface 10; the first end of the first connector 40 is connected to the charging processing circuit 30, and the second end of the first connector 40 is connected to the positive electrode of the battery assembly 50; the negative electrode of the battery assembly 50 is connected to the second connector 60.

[0032] Specifically, when charging the battery assembly 50, after the charging current flows in from the charging interface 10, it flows directly into the positive electrode of the battery assembly 50 through the first connector 40 after being processed by the charging processing circuit 30, and flows out through the second connector 60 through the negative electrode of the battery assembly 50, thereby realizing the charging of the battery assembly 50. It can be seen that the charging current sequentially passes through the charging interface 10, the charging processing circuit 30, the first connector 40, and the second connector 60. The charging circuit is short, and the positive and negative electrodes of the battery assembly 50 are respectively connected to the charging processing circuit 30 through different connectors (40 and 60), thereby increasing the contact area between the positive and negative electrodes of the battery assembly and the charging processing circuit, reducing the heat generation of the connection terminals in the connector in the high-current charging mode, thereby not only ensuring that the total power loss during charging is small, but also reducing the local heat generation of the charging path during high-power high-current fast charging. Among them, the number of the first connector 40 and / or the second connector 60 can be more than one.

[0033] It can be understood that the mobile terminal according to the embodiments of the present invention can be a mobile phone, a smart phone, a notebook computer, or a tablet computer. The small board 20 in the mobile phone is usually located at the bottom of the mobile phone, and it may include: a HOME key, an LED (Light Emitting Diode) lamp, a speaker and contacts, solder joints, an antenna and contacts, a device connected to the main board, circuit devices (chips, resistors, and capacitors, etc.), and assembly holes. The board thickness of the small board 20 is generally between 0.5 and 1.0.

[0034] It should be noted that the charging processing circuit 30 in the embodiments of the present application can be deformed or changed according to the specific implementation form of the mobile terminal. For example, it can be a specific voltage processing circuit or a charging wire connecting the charging interface 10 and the connector. The description method of the present application cannot be used as a limitation on its specific implementation form.

[0035] It should be noted that as Figure 1 shown, when the positive and negative electrodes of the battery assembly (or battery pack) are set away from the USB socket, the assembly method of the battery pack is a forward assembly; as Figure 2 shown, when the positive and negative electrodes of the battery assembly 50 are close to the USB, the assembly method of the battery pack is an inverted assembly.

[0036] In the mobile terminal according to the embodiment of the present invention, the battery assembly 50 is assembled in an inverted manner, and two connectors (the first connector 40 and the second connector 60) are provided, so that when charging the battery assembly 50, the charging path is shorter. Compared with the prior art solution of assembling the battery assembly in a forward manner and providing one connector, the charging path can be shortened, the impedance of the charging path can be reduced, and the charging efficiency can be improved; compared with the prior art solution of reducing the impedance value of each device on the charging path to reduce the path impedance, the charging path can be shortened from the structural aspect, thereby substantially reducing the path impedance, and reducing the local heating of the charging path during high-power large-current fast charging.

[0037] Therefore, the mobile terminal can shorten the charging path and reduce the path impedance through two connectors, thereby improving the charging efficiency while reducing the heating of the charging path and improving the user experience.

[0038] In an embodiment of the present invention, as Figure 3 shown, the battery assembly 50 includes a battery cell 51 and a battery protection board 52. Among them, the distance between the battery protection board 52 and the small board 20 is less than the distance between the battery cell 51 and the small board 20.

[0039] Specifically, the distance between the battery protection board 52 and the small board 20 is less than the distance between the battery cell 51 and the small board 20, so as to ensure that the battery protection board 52 is arranged close to the small board 20 relative to the battery cell 51. Among them, the shape of the battery protection board 52 can be rectangular and is arranged horizontally below the battery cell 51. Therefore, the path between the charging interface 10 - the battery protection board 52 - the battery cell 51 is as straight as possible. Compared with arranging the battery protection board on the side of the battery cell (at this time, the charging current first passes through the side of the battery cell and then through the bottom of the battery cell), the charging current does not need to pass through the side of the battery cell, so the charging path is shorter.

[0040] Further, the first connector 40 is disposed on the side where the small board 20 is adjacent to the battery protection board 52; the second connector 60 is disposed on the side where the small board is adjacent to the battery protection board 52.

[0041] Specifically, the first connector 40 and the second connector 60 are respectively disposed at two ends of the side of the small board 20 adjacent to the battery protection board 52. On this basis, the first connector 40 and the second connector 60 can be disposed as far apart as possible to avoid the phenomenon of excessive local temperature caused when charging the battery cell 51.

[0042] In an embodiment of the present invention, as Figure 4 shown, the second end of the first connector 40 is connected to the positive electrode of the battery assembly 50 through the first flexible circuit board 70; the negative electrode of the battery assembly 50 is connected to the first end of the second connector 60 through the second flexible circuit board 80. Among them, the flexible printed circuit board is abbreviated as FPC.

[0043] Specifically, when charging the battery cell 51, after the charging current flows in from the charging interface 10, it flows into the battery cell 51 after being processed by the charging processing circuit 30, passing through the first connector 40 and the battery protection board 52, and flowing out from the negative electrode of the battery cell 51, thereby realizing the charging of the battery assembly 50. Among them, both the first connector 40 and the second connector 60 can be BTB (Board-to-Board Connectors), and the charging interface 10 can be a USB socket.

[0044] In an embodiment of the present invention, referring to Figure 4 , the mobile terminal may further include: a third flexible circuit board 90 and a main board 100; the first end of the third flexible circuit board 90 is respectively connected to the first end of the first connector 40 and the second end of the second connector 60; the second end of the third flexible circuit board 90 is connected to the power supply end of the main board 100. So as to realize discharging through the third flexible circuit board when the battery cell 51 discharges.

[0045] Among them, the main board 100 in the mobile phone refers to the circuit board inside the mobile phone, which can also be called a PCB (Printed Circuit Board) board. The main board 100 generally includes a baseband part and a radio frequency part. Among them, the baseband part includes a baseband chip and a power management chip for receiving signals; the radio frequency part includes a radio frequency processor and a radio frequency power amplifier for transmitting signals and receiving signals; the main board 100 generally further includes a CPU (central processing unit), memory, Bluetooth, sensors, microphones, speakers, camera, interfaces for display screens, etc.

[0046] Specifically, when powering the main board 100, the power supply current passes through the charging interface 10, the charging processing circuit 30, and the third flexible circuit board 90 in sequence and then enters the main board 100, thereby realizing the power supply to the main board.

[0047] It should be noted that in this embodiment, as Figure 5 shown, the battery assembly 50 may further include two battery cells 51, that is, the number of battery cells in the battery assembly 50 may be two.

[0048] In an example of the present invention, as Figure 6 shown, the charging processing circuit 30 may include a first voltage conversion circuit 31 and a second voltage conversion circuit 32 connected in parallel. Among them, the operating power of the first voltage conversion circuit 31 is greater than that of the second voltage conversion circuit 32; the small board 20 may further include a control circuit 21: the first output terminal of the control circuit 21 is connected to the control terminal of the first voltage conversion circuit 31; the second output terminal of the control circuit 21 is connected to the control terminal of the second voltage conversion circuit 32; the first input terminal of the control circuit 21 is connected to the charging interface 10, and is used to control the operating states of the first voltage conversion circuit 31 and / or the second voltage conversion circuit 32 according to the charging current of the charging interface 10.

[0049] Among them, the first voltage conversion circuit 31 may be any one of the following circuits: a switched-capacitor voltage converter, a Metal-Oxide-Semiconductor Field Effect Transistor (abbreviated as MOSFET). The second voltage conversion circuit 32 may be a DC voltage converter, which can be used for boosting or bucking, and the second voltage conversion circuit 32 may be a Buck circuit, a boost circuit, a buck / boost circuit, or a charge pump circuit.

[0050] Specifically, during the actual charging process, the first voltage conversion circuit 31 can convert alternating current into direct current, the first voltage conversion circuit 31 will perform boosting or bucking processing on the charging voltage, and the power of the first voltage conversion circuit 31 is greater than that of the second voltage conversion circuit 32 to meet the charging requirements and ensure charging reliability.

[0051] Furthermore, the small board 20 may further include a temperature detection circuit 22. The output terminal of the temperature detection circuit 22 is connected to the second input terminal of the control circuit 21; the control circuit 21 is further used to control the operating states of the first voltage conversion circuit 31 and / or the second voltage conversion circuit 32 according to the output signal of the temperature detection circuit 22. Among them, the signal output by the temperature detection circuit 22 may be a voltage signal.

[0052] Further, the control circuit 21 may be specifically configured to: when the charging current is less than the first threshold or the output signal of the temperature detection circuit 22 is used to indicate that the temperature detected by the temperature detection circuit exceeds the threshold, control to turn off the first voltage conversion circuit 31 and start the second voltage conversion circuit 32.

[0053] Specifically, when charging the battery assembly 50, the control circuit 21 may control the turning on and off of the first voltage conversion circuit 31 and the second voltage conversion circuit 32 according to the magnitude of the charging current of the charging interface 10 or the magnitude of the output signal of the temperature detection circuit 22. Among them, the output signal may be an output voltage. The greater the output voltage of the temperature detection circuit 22, the higher the detected temperature, that is, the more serious the heat generation of the small board 20. Specifically, if the charging current is less than the first threshold, or the output voltage of the temperature detection circuit 22 indicates that the temperature detected by the temperature detection circuit 22 exceeds the temperature threshold, it means that the charging current is small, or the heat generation temperature of the small board 20 is large. At this time, in order to prevent the heat generation temperature from continuing to increase, it is necessary to turn off the first voltage conversion circuit 31 and start the second voltage conversion circuit 32 to make the second conversion circuit 32 with a smaller power work.

[0054] It should be understood that if the charging current is greater than or equal to the first threshold and the output voltage of the temperature detection circuit 22 indicates that the temperature detected by the temperature detection circuit 22 does not exceed the temperature value, it means that the charging current is large and the heat generation temperature is small. Then, the first voltage conversion circuit 31 can be controlled to turn on and the second voltage conversion circuit 32 can be controlled to turn off, so that the first voltage conversion circuit 31 with a larger power works to further improve the charging efficiency.

[0055] In summary, the mobile terminal according to the embodiment of the present invention can optimize the charging path from the structural aspect, and can shorten the charging path and reduce the path impedance through two connectors, so that while improving the charging efficiency, the charging path and the heat generation of the battery protection board can be reduced, and the user experience can be improved.

[0056] It should be understood that each part of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, any one or a combination of the following technologies well known in the art can be used: discrete logic circuits with logic gate circuits for implementing logic functions on data signals, application specific integrated circuits with appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

[0057] In addition, in the description of the present invention, the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0058] Furthermore, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0059] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0061] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0062] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A mobile terminal, characterized in that, it includes: a charging interface and a small board; the charging interface is connected to the small board, or the charging interface is provided on the small board; the mobile terminal further includes: a charging processing circuit, a battery assembly, a first connector and a second connector; the charging processing circuit is provided on the small board, and the input end of the charging processing circuit is connected to the charging interface; the first end of the first connector is connected to the charging processing circuit, and the second end is connected to the positive electrode of the battery assembly; the negative electrode of the battery assembly is connected to the second connector; the battery assembly includes a battery cell and a battery protection board; the distance between the battery protection board and the small board is less than the distance between the battery cell and the small board; when charging the battery assembly, the charging current sequentially passes through the charging interface, the charging processing circuit, the first connector and enters the battery assembly, and flows out of the battery assembly through the second connector.

2. The mobile terminal according to claim 1, characterized in that, the first connector is provided on the side adjacent to the battery protection board and the small board; the second connector is provided on the side adjacent to the battery protection board and the small board.

3. The mobile terminal according to claim 1, characterized in that, the second end of the first connector is connected to the positive electrode of the battery assembly through a first flexible circuit board; the negative electrode of the battery assembly is connected to the second connector through a second flexible circuit board.

4. The mobile terminal according to claim 1, characterized in that, it further includes: a third flexible circuit board and a main board; the first end of the third flexible circuit board is respectively connected to the first end of the first connector and the second end of the second connector; the second end of the third flexible circuit board is connected to the power supply end of the main board.

5. The mobile terminal according to any one of claims 1-4, characterized in that, the charging processing circuit includes a first voltage conversion circuit and a second voltage conversion circuit connected in parallel; the small board further includes a control circuit; the first output end of the control circuit is connected to the control end of the first voltage conversion circuit, and the second output end of the control circuit is connected to the control end of the second voltage conversion circuit; the first input end of the control circuit is connected to the charging interface, and is used to control the working state of the first voltage conversion circuit and / or the second voltage conversion circuit according to the charging current of the charging interface.

6. The mobile terminal according to claim 5, characterized in that, the small board further includes a temperature detection circuit; the output end of the temperature detection circuit is connected to the second input end of the control circuit; the control circuit is further used to control the working state of the first voltage conversion circuit and / or the second voltage conversion circuit according to the output signal of the temperature detection circuit.

7. The mobile terminal according to claim 6, characterized in that, the control circuit is specifically used for: When the charging current is less than a first threshold value, or the output signal of the temperature detection circuit is used to indicate that the temperature detected by the temperature detection circuit exceeds a temperature threshold value, control to turn off the first voltage conversion circuit and start the second voltage conversion circuit.

8. The mobile terminal according to claim 5, wherein, the first voltage conversion circuit is any one of the following circuits: a switched-capacitor voltage converter, a metal-oxide-semiconductor field effect transistor.

9. The mobile terminal according to claim 8, wherein, the second voltage conversion circuit is a DC voltage converter.

10. The mobile terminal according to claim 1, wherein, the number of the battery cells is multiple.

11. The mobile terminal according to claim 1, wherein, the number of the first connector and / or the second connector is more than one.

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