CN219478277U

CN219478277U - Electronic equipment

Info

Publication number: CN219478277U
Application number: CN202320245168.3U
Authority: CN
Inventors: 王冠杰
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2023-02-06
Filing date: 2023-02-06
Publication date: 2023-08-04
Anticipated expiration: 2033-02-06

Abstract

The utility model discloses an electronic equipment, this electronic equipment includes the back shell and sets up in the electrical component of back shell front side, electrical component includes mainboard and battery, the mainboard passes through flexible circuit board and links to each other with the battery, the heat productivity that flexible circuit board produced can effectively be reduced in the heat radiation structure of electrical component's front side to reduce the overall calorific capacity of electronic equipment in the charging process, prevent to need reduce charging current because of electronic equipment back shell temperature rise, the extension heavy current charging time, shorten the charging process and improve charging efficiency, prevent that electronic equipment back shell temperature is too high, optimize user experience.

Description

Electronic equipment

Technical Field

The disclosure relates to the field of terminal equipment charging, and in particular relates to electronic equipment.

Background

The electronic equipment such as mobile phones and the like can generate heat in the charging process, particularly the situation that the electronic equipment is scalded in certain areas of the back shell of the electronic equipment can be caused, so that the user experience is affected.

Disclosure of Invention

To overcome the problems in the related art, the present disclosure provides an electronic device.

In accordance with an embodiment of the present disclosure, there is provided an electronic device including:

the back shell and the electric component are arranged on the front side of the back shell, the electric component comprises a main board and a battery, and the main board is connected with the battery through a flexible circuit board;

the front side of the electric component is provided with a heat dissipation structure, and the flexible circuit board is arranged on the front side of the electric component and opposite to the heat dissipation structure.

In some embodiments of the disclosure, the battery includes a battery body and a battery protection board, the battery protection board with be close to on the battery body the one end of mainboard is connected, the battery protection board includes towards the first surface of back shell and towards heat radiation structure's second surface, the flexible circuit board with the laminating of second surface sets up.

In some embodiments of the disclosure, the flexible circuit board is L-shaped, including a first bar portion and a second bar portion that are the angle setting, wherein, first bar portion with the laminating of second surface sets up, second bar portion stretches out battery protection shield and with the mainboard is connected.

In some embodiments of the present disclosure, the first bar portion is provided with a pad, and the first bar portion is welded with the battery protection plate through the pad and/or,

the second strip-shaped part is provided with a connector, and the second strip-shaped part is connected with the main board through the connector.

In some embodiments of the disclosure, two flexible circuit boards are provided, and the two flexible circuit boards are respectively provided at two ends of the battery protection board.

In some embodiments of the present disclosure, the first strip-shaped portions of the two L-shaped flexible circuit boards extend in opposite directions, respectively.

In some embodiments of the disclosure, the heat dissipation structure includes a first heat dissipation portion corresponding to a position of the battery protection board, the flexible circuit board, and a portion of the motherboard.

In some embodiments of the disclosure, the battery includes a middle region and bonding regions located at two sides of the middle region, the bonding regions are used for bonding with the back shell, the heat dissipation structure includes a second heat dissipation part connected with the first heat dissipation part, and the second heat dissipation part corresponds to the middle region.

In some embodiments of the disclosure, the electronic device further comprises a middle frame, the electrical component is disposed between the back shell and the middle frame, and the heat dissipation structure is disposed on the middle frame.

In some embodiments of the present disclosure, at least a partial region of the flexible circuit board abuts the heat dissipation structure.

In some embodiments of the present disclosure, the heat dissipation structure includes a vapor chamber.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects: the flexible circuit board that this disclosure provided will connect battery and mainboard sets up in electrical component's front side and sets up relatively with heat radiation structure to reduce the overall calorific capacity of electronic equipment among the charging process, thereby when not influencing charging efficiency, prevent the temperature rise of electronic equipment back shell, optimize user experience.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic view of an internal structure of an electronic device in the related art;

FIG. 2 is a schematic temperature diagram of a back shell of the electronic device shown in FIG. 1;

FIG. 3 is a front view of an electronic device shown according to an exemplary embodiment;

fig. 4 is a top view of an electronic device shown according to an example embodiment.

In the figure:

1-an electronic device; 10-back shell; 20-middle frame; 30-a main board; 40-cell; 41-a battery body; 42-battery protection plate; 421-a first surface; 422-a second surface; 50-a flexible circuit board; 51-a first strip; 52-a second strip; 60-a heat dissipation structure; 61-a first heat sink; 62-a second heat sink; 70-camera.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.

Referring to fig. 1 and 2, in the related art, the electronic device 1 includes a main board 30, a battery 40 and a back shell 10, the main board 30 is connected with the battery 40 through a flexible circuit board 50, where the flexible circuit board 50 is disposed on one side of the battery 40 facing the back shell 10, as shown in fig. 1, the flexible circuit board 50 is disposed in abutment with the back shell 10 of the electronic device 1, and in the process of charging the electronic device 1, the current flowing through the flexible circuit board 50 can reach about 20A at most, so that a serious heating phenomenon occurs on the flexible circuit board 50, and further an obvious hot spot will occur on the back shell 10 of the electronic device 1, as shown in fig. 2, the square frame is the hot spot area of the back shell 10, thereby affecting the user experience.

At present, in the charging process of the electronic device 1, an algorithm, such as a SIC algorithm, is generally adopted, a value of a fitting temperature in the charging process is calculated, and by continuously changing the magnitude of a charging current and approaching to a set target temperature value, overheating of the back shell 10 of the electronic device 1 caused by overlarge current flowing through the flexible circuit board 20 is avoided, but changing the magnitude of the charging current in the charging process can cause the electronic device 1 to be incapable of continuously charging with a large current, so that the charging speed of the electronic device 1 is affected, and the problem of heating of the back shell 10 caused by hot spots generated under the condition of continuously charging with the large current cannot be solved.

As shown in fig. 3, an exemplary embodiment of the present disclosure provides an electronic device 1, the electronic device 1 including a back case 10 and an electrical component disposed on a front side of the back case 10. Wherein the back shell 10 is located at the back of the electronic device 1, i.e. when the user is using the electronic device 1 normally, the back shell 10 is located at the side of the electronic device 1 facing away from the user. The electrical components disposed on the front side of the back case 10 include a main board 30 and a battery 40, and the battery 40 can supply power to other electrical devices of the electronic device 1 through the main board 30. The main board 30 and the battery 40 are arranged side by side in the electronic device 1, for example, as shown in fig. 3, the main board 30 and the battery 40 are arranged up and down.

It will be appreciated that the front side described herein refers to the orientation of the user when facing the front of the electronic device 1, i.e. the electrical components are closer to the user than the back shell 10 when the user is using the electronic device 1 normally.

The electronic device 1 may be a mobile phone, a tablet computer, a wearable device, an electronic reader, a multimedia playing device, etc., for example.

Referring to fig. 4, a camera 70 may be disposed on the back shell 10 for photographing to meet photographing requirements of a user.

With continued reference to fig. 3, the main board 30 is connected with the battery 40 through the flexible circuit board 50, the flexible circuit board 50 is a highly reliable and flexible printed circuit board made of polyimide or polyester film as a main material, the flexible circuit board 50 has excellent bending property, can be freely folded, bent and wound, has light weight and thin thickness, and can be set according to space layout, and the flexible circuit board 50 can bear millions of dynamic bending without damaging wires, thereby being beneficial to reducing the volume of the electronic equipment, reducing the weight of the electronic equipment and meeting the requirement of developing the electronic equipment in the direction of miniaturization and high density. Illustratively, the flexible circuit board 50 is electrically connected to output terminals (not shown) of the positive and negative electrodes, respectively, that are led out of the interior of the battery 40, thereby forming a charging circuit.

The front side of electrical component is provided with heat radiation structure 60, flexible circuit board 50 sets up in the front side of electrical component and sets up with heat radiation structure 60 relatively, so, flexible circuit board 50 can in time dispel through heat radiation structure 60 at the heat that electronic equipment 1 produced in the charging process, thereby reduce the overall calorific capacity of electronic equipment 1 in the charging process, prevent to reduce the heat that flexible circuit board 50 produced in order to reduce the temperature of back shell 10 through reducing charging current because of the temperature rise of back shell 10 of electronic equipment 1, promote the time that adopts heavy current charging, and then promote charging efficiency, simultaneously, prevent that the temperature of back shell 10 of electronic equipment 1 is too high, optimize user experience.

In an embodiment, the electronic device 1 further comprises a middle frame 20, wherein the middle frame 20 is located inside the electronic device 1 and is used for providing rigid support for electronic components inside the electronic device 1. The material of the middle frame 20 may be, for example, an aluminum alloy, which has good thermal conductivity, so that heat generated in the charging or using process of the electronic device 1 can be effectively conducted, and a rigid support is provided for electronic components inside the electronic device 1, so that the electronic components inside the electronic device 1 are effectively protected. The middle frame 20 may be made of stainless steel, titanium alloy, steel-aluminum composite material, etc. with heat conductivity, and high hardness and strength, which is not limited in this embodiment.

The electrical component is disposed between the back shell 10 and the middle frame 20, and the heat dissipation structure 60 is disposed on the middle frame 20, so that heat of the flexible circuit board 50 can be conducted to the middle frame 20 through the heat dissipation structure 60, and when the middle frame is made of metal with good thermal conductivity, heat conduction is facilitated.

In an embodiment, with continued reference to fig. 3, the battery 40 includes a battery body 41 and a battery protection plate 42, wherein the battery body 41 may be, for example, a lithium ion battery, for storing energy and providing electric energy to other electric devices of the electronic device 1; the battery protection plate 42 is connected to one end of the battery body 41 near the main board 30.

Referring to fig. 1 and 2, the battery body 41 is illustratively shaped as a rectangular parallelepiped with a small thickness, and thus, it is advantageous to reduce the thickness of the electronic apparatus 1. The shape of the battery body 41 may be other shapes, such as a cylinder or a rectangular parallelepiped having a large thickness, and the present embodiment is not limited thereto.

The battery protection board 42 is an integrated circuit board that can protect the battery body 41, for example, a lithium battery. The battery body 41 cannot be overcharged, overdischarged, overcurrent, short-circuit, or the like at the time of charging, and therefore, the battery protection plate 42 mainly plays a role of providing overcharge protection, overdischarge protection, overcurrent protection, and short-circuit protection for the battery. The battery protection plate 42 includes heat generating devices such as precision resistors, control integrated circuits, and metal-oxide-semiconductor field effect transistors (metal oxide SemiconductorFieldEffectTransistor, MOS tubes), which cause the battery protection plate 42 to generate heat during the charging of the battery 40. Therefore, the battery protection plate 42 is generally disposed close to the heat radiation structure 60, so that the battery protection plate 42 is facilitated to radiate heat, and the overall heat generation amount of the electronic apparatus 1 can be reduced while protecting the battery body 41.

The battery protection plate 42 and the battery body 41 are electrically connected, and the battery protection plate 42 may be fixed to one end of the battery body 41 by adhesion, for example.

Referring to fig. 3, the length of the battery protection plate 42 is smaller than the length of the battery body 41, the width of the battery protection plate 42 is smaller than the width of the battery body 41, and the shape of the battery protection plate 42 may be rectangular, elliptical, circular, trapezoid, or other shapes. The battery protection board 42 includes the first surface 421 towards the back shell 10 and the second surface 422 towards the middle frame 20, and the flexible circuit board 50 is attached to the second surface 422 of the battery protection board 42, so that the flexible circuit board 50 can be far away from the back shell 10, and the temperature rise of the back shell 10 caused by the heat generated by the flexible circuit board 50 in the charging process can be avoided, which is beneficial to optimizing the user experience.

In one embodiment, referring to fig. 1 and 2, the flexible circuit board 50 has an L-shape and includes a first strip portion 51 and a second strip portion 52 disposed at an angle. Illustratively, the angle between the first strip 51 and the second strip 52 may be 90 ° such that the first strip 51 is disposed perpendicular to the second strip 52. Illustratively, the first strip 51 and the second strip 52 may be different in length and width. The first strip-shaped portion 51 is adhered to the second surface 422, and the extension length of the first strip-shaped portion 51 does not exceed the length of the battery protection plate 42, so that the connection between the first strip-shaped portion 51 and the positive electrode and negative electrode output ends led out from the battery 40 is facilitated; the second bar portion 52 extends out of the battery protection plate 42 and is connected to the main board 30, facilitating connection of the second bar portion 52 to the main board 30.

Of course, it is understood that the flexible circuit board 50 may be configured in other shapes, such as square, trapezoid, fan-shaped, circular, etc., and the present embodiment is not limited thereto.

For example, the first strip portion 51 and the second surface 422 may be connected by welding, gluing, hot pressing, or the like; the second strip portion 52 and the main board 30 may be connected by welding, gluing, hot pressing, or the like.

In one embodiment, the first strip-shaped portion 51 is provided with a bonding pad, and the bonding between the first strip-shaped portion 51 and the second surface 422 is performed, and the first strip-shaped portion 51 is bonded to the second surface 422 of the battery protection plate 42 through the bonding pad; the second bar 52 is provided with a connector, and the second bar 52 is connected to the main board 30 through the connector.

In one embodiment, two flexible circuit boards 50 are provided, and the two flexible circuit boards 50 are respectively disposed at two ends of the battery protection board 42. Illustratively, referring to fig. 3, flexible circuit boards 50 disposed at both ends of the battery protection board 42 are electrically connected to the positive and negative output terminals, respectively, of the battery 40, which are internally led out, to form two charging loops. Illustratively, when the total current passing through the battery 40 during charging is 20A, the current passing through each flexible circuit board 50 is 10A, and thus, the flexible circuit boards 50 are respectively arranged at the two ends of the battery protection board 42, so that the current passing through the flexible circuit boards 50 during charging can be effectively reduced, the heat generated on the flexible circuit boards 50 is reduced, the temperature of the battery 40 during charging is reduced, and the charging time using large current is prolonged.

Wherein, flexible circuit board 50 still can set up to one, three or more, when flexible circuit board 50 is provided with three and more, every flexible circuit board 50 all is connected with the positive pole and the negative pole output electricity that battery 40 is inside to form three and more charging circuit, the electric current through each flexible circuit board 50 will reduce, thereby the heat that produces on every flexible circuit board 50 will reduce, can effectively avoid battery 40 to appear the condition that the temperature is too high in the charging process, be favorable to prolonging the time of using heavy current to charge.

In an embodiment, the first strip-shaped portions 51 of the two L-shaped flexible circuit boards 50 respectively extend in opposite directions, and the first strip-shaped portions 51 of the flexible circuit boards 50 may also extend in the same direction or in opposite directions. Illustratively, as shown in fig. 1, the first strip-shaped portion 51 of the flexible circuit board 50 is attached to the battery protection board 42, and extends to two sides of the battery protection board 42 respectively, and the extending directions are opposite, so that the first strip-shaped portion 51 of the battery protection board 42 is reasonably distributed in space.

In an embodiment, the heat dissipation structure 60 includes the first heat dissipation portion 61, referring to fig. 3, the position of the first heat dissipation portion 61 is partially overlapped with the motherboard 30, the overlapping area of the first heat dissipation portion 61 and the motherboard 30 can be set according to actual needs, and for example, the area corresponding to the first heat dissipation portion 61 and the motherboard 30 occupies 60% to 80% of the motherboard area, so that the first heat dissipation portion 61 can dissipate heat generated by the motherboard 30 in time during use, so as to avoid the influence on user experience caused by overhigh temperature of the motherboard 30. The heat dissipation structure 60 further includes a second heat dissipation portion 62, and the length of the second heat dissipation portion 62 may be the same as the length of the first heat dissipation portion 61 or may be different from the length of the first heat dissipation portion; the width of the second heat dissipation portion 62 may be the same as the width of the first heat dissipation portion 61, or may be different from the width of the first heat dissipation portion 61. Illustratively, referring to fig. 1, the width of the second heat dissipating portion 62 is smaller than the width of the first heat dissipating portion 61, the length of the second heat dissipating portion is greater than the length of the first heat dissipating portion 61, and the second heat dissipating portion 62 is connected to the first heat dissipating portion 61. The first heat dissipation portion 61 corresponds to the positions of the battery protection board 42 and the flexible circuit board 50, so that the first heat dissipation portion 61 can timely dissipate heat generated by the battery protection board 42 and the flexible circuit board 50 in a charging process, the temperature rising range of the battery 40 during charging is reduced, the time for charging the battery 40 by high current is prolonged, the charging efficiency of the battery 40 is improved, and user experience is optimized.

In an embodiment, the battery 40 includes a middle area and bonding areas located at two sides of the middle area, and the middle area of the battery 40 is rectangular, corresponding to the position of the second heat dissipation portion 62, the middle area of the battery 40 may also be elliptical, triangular, parallelogram, etc., so that the heat generated in the middle area of the battery 40 can be directly diffused by the second heat dissipation portion 62 during the charging process, thereby achieving the effect of reducing the overall temperature of the battery 40. The bonding areas on two sides of the battery 40 are used for bonding with the back shell 10, so that the battery 40 is prevented from being shifted due to the influence of external force, the normal operation of the battery 40 is prevented from being influenced, and the stability of the battery 40 in the electronic device 1 is improved.

In one embodiment, at least a portion of the flexible circuit board 50 abuts the heat dissipation structure 60. Referring to fig. 3 and 4, illustratively, the flexible circuit board 50 is completely abutted against the heat dissipation structure 60, which is beneficial to timely cooling hot spots generated on the flexible circuit board 50 during the charging process of the battery 40, avoiding the excessive temperature of the flexible circuit board 50 from adjusting the current, and being beneficial to prolonging the charging time period with high current.

Of course, it is understood that in other embodiments, the flexible circuit board 50 may have a gap with the heat dissipating structure 60, and the flexible circuit board 50 transfers heat to the heat dissipating structure 60 through air in the gap.

In one embodiment, the heat dissipation structure 60 includes a vapor chamber. The material of the vapor chamber may be copper with good heat dissipation performance, aluminum, high-strength stainless steel, or other materials, and the inner wall of the vapor chamber is a vacuum cavity with a microstructure. When heat is conducted to the evaporation area of the soaking plate, the cooling liquid in the cavity absorbs the heat and is heated to gasify, the volume of the cooling liquid rapidly expands and fills the whole cavity, and the cooling liquid can uniformly conduct heat, so that the cooling effect is achieved. The cooling liquid may be water with a larger specific heat capacity, or may be methanol, acetone, or the like, which is not limited in this embodiment.

The heat dissipation structure 60 may further include a heat conduction layer, where the heat conduction layer can efficiently conduct the heat generated by the battery 40 to the first heat dissipation portion 61 and the second heat dissipation portion 62, so that the heat accumulation in the battery 40 can be reduced, and further, the duration of charging with a large current can be increased, so that the charging efficiency of the battery 40 is improved, and the user experience is improved. The material of the heat conducting layer may be graphene, and the shape of the heat conducting layer may be rectangle, circle, ellipse or other shapes.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any adaptations, uses, or adaptations of the disclosure following the general principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. The electronic equipment is characterized by comprising a back shell and an electrical component arranged on the front side of the back shell, wherein the electrical component comprises a main board and a battery, and the main board is connected with the battery through a flexible circuit board;

2. The electronic device of claim 1, wherein the battery comprises a battery body and a battery protection plate, the battery protection plate is connected with one end of the battery body near the main board, the battery protection plate comprises a first surface facing the back shell and a second surface facing the heat dissipation structure, and the flexible circuit board is attached to the second surface.

3. The electronic device of claim 2, wherein the flexible circuit board is L-shaped and comprises a first strip-shaped portion and a second strip-shaped portion disposed at an included angle, wherein the first strip-shaped portion is attached to the second surface, and the second strip-shaped portion extends out of the battery protection board and is connected to the main board.

4. An electronic device as claimed in claim 3, characterized in that the first strip-shaped portion is provided with a bonding pad, by means of which the first strip-shaped portion is welded to the battery protection plate and/or,

5. The electronic device according to any one of claims 2 to 4, wherein two of the flexible circuit boards are provided, and the two flexible circuit boards are provided at both ends of the battery protection board, respectively.

6. The electronic device of claim 5, wherein the first strip portions of the two L-shaped flexible circuit boards each extend in a direction away from each other.

7. The electronic device according to any one of claims 2 to 4, wherein the heat dissipation structure includes a first heat dissipation portion corresponding to positions of the battery protection board, the flexible circuit board, and a part of the main board.

8. The electronic device of claim 7, wherein the battery includes a middle region and bonding regions located at both sides of the middle region, the bonding regions being configured to bond with the back case, and the heat dissipation structure includes a second heat dissipation portion connected to the first heat dissipation portion, the second heat dissipation portion corresponding to the middle region.

9. The electronic device of any one of claims 1-4, further comprising a center frame, wherein the electrical component is disposed between the back shell and the center frame, and wherein the heat dissipation structure is disposed on the center frame.

10. The electronic device of any one of claims 1-4, wherein at least a portion of the area of the flexible circuit board abuts the heat dissipation structure.

11. The electronic device of any one of claims 1-4, wherein the heat dissipation structure comprises a vapor chamber.