CN217468631U

CN217468631U - Battery pack and terminal device

Info

Publication number: CN217468631U
Application number: CN202221359375.3U
Authority: CN
Inventors: 杜思红; 胡心雨
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-09-20
Anticipated expiration: 2032-05-31

Abstract

The application discloses battery pack and terminal equipment belongs to battery design technical field. The battery assembly comprises a battery body and a stop member. The stopping assembly is positioned on at least one side of the battery body, the orthographic projection of the battery body is positioned in the surface on the surface of the stopping assembly opposite to the battery body, and the stopping assembly is used for applying acting force pointing to the battery body. This scheme of adoption, when battery body took place to expand, this meeting of battery caused the extrusion to the backstop closes the piece, and the backstop closes the piece and then can apply an effort for battery body along directional battery body's direction to restrain battery body's further inflation, thereby, increase the life of battery, avoid because the unable problem of using of product that the battery inflation leads to.

Description

Battery pack and terminal device

Technical Field

The application relates to the technical field of battery design, in particular to a battery pack and a terminal device.

Background

Batteries are widely used in electronic products (e.g., mobile phones, tablet computers, notebook computers, etc.).

As the battery is used, the number of charge and discharge times of the battery increases, the battery may swell to some extent, and the longer the battery is used, the greater the number of charge and discharge times, the more the swelling may be.

The expansion of the battery not only seriously affects the service life of the battery, but also can cause the product to be incapable of normal use when the battery is seriously expanded.

Disclosure of Invention

The embodiment of the application provides a battery pack and a terminal device, and can solve the problems that the service life of a battery is short and a product cannot be normally used due to battery expansion in the related art. The technical scheme is as follows:

in a first aspect, the present application provides a battery assembly comprising a battery body and a stopper element;

the stopping assembly is positioned on at least one side of the battery body, the orthographic projection of the battery body is positioned in the surface on the surface of the stopping assembly opposite to the battery body, and the stopping assembly can apply acting force pointing to the battery body.

In one possible implementation manner, the battery body is of a flat plate structure, and the stopping part is positioned on at least one side in the thickness direction of the battery body.

In one possible implementation, the stopper element includes at least one stopper element disposed adjacent to a surface in the thickness direction of the battery body.

In a possible implementation manner, the stopping sub-assembly includes a first stopping plate and a pressurizing member, the first stopping plate is arranged opposite to the battery body, the pressurizing member is located on a side of the first stopping plate away from the battery body and is connected with the first stopping plate, and the pressurizing member applies an acting force directed to the battery body to the first stopping plate so as to drive the first stopping plate to apply the acting force to the battery body.

In one possible implementation manner, the stopping subassembly includes a plurality of pressing members, and the plurality of pressing members are uniformly distributed on a side of the first stopping plate away from the battery body.

In one possible implementation, the pressure piece is a telescopic cylinder.

In one possible implementation, the pressure member includes a cylinder and a piston rod;

the end face of one end of the cylinder body is provided with a mounting hole;

the piston of the piston rod is positioned in the cylinder body, a first cavity and a second cavity are formed by the piston of the piston rod and the inner wall of the cylinder body, the piston rod is positioned in the first cavity, and the rod body of the piston rod is inserted into the mounting hole, is in sealed fit with the mounting hole and is connected with the first stop plate;

the wall of the barrel body is provided with a vent hole, and the vent hole is connected with the second cavity.

In one possible implementation, the thickness of the first stop plate is 50 to 200 microns.

In a possible implementation manner, the stopper assembly includes two stopper sub-assemblies, and the two stopper sub-assemblies are respectively located on two sides of the battery body in the thickness direction.

In a possible implementation manner, the stop assembly comprises a connecting piece and two second stop plates, wherein the connecting piece is located between the two second stop plates and is respectively connected with the two second stop plates;

the battery body is located between the two second stop plates.

In a second aspect, the present application provides a terminal device, where the terminal device includes a housing and a battery assembly as described in any one of the first aspect and possible implementations thereof, the housing has a battery compartment, the battery assembly is located in the battery compartment, and a stopping component of the battery assembly is connected to an inner wall of the battery compartment.

The technical scheme provided by the embodiment of the application has the following beneficial effects:

in the scheme that this application embodiment provided, battery pack includes battery body and backstop closing member, and the backstop closing member is located at least one side of battery body, and moreover, the orthographic projection of battery body on the surface that backstop closing member and battery body are relative is located this surface. When the battery body expands, the battery body can extrude the stop assembly, and the stop assembly applies an acting force to the battery body along the direction pointing to the battery body so as to inhibit the battery body from further expanding, thereby prolonging the service life of the battery and avoiding the problem that the product cannot be used due to the expansion of the battery.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a terminal device provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a battery assembly provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a battery assembly provided in an embodiment of the present application;

FIG. 4 is a schematic view of a stopper sub-assembly provided in an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a stop subassembly provided in an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a stop subassembly provided in an embodiment of the present application;

fig. 7 is a schematic structural diagram of a battery assembly according to an embodiment of the present disclosure.

Description of the figures

1. A battery body; 2. a stopper assembly; 3. a housing;

21. a stopper sub-assembly; 22. a connecting member; 23. a second stopper plate; 31. a battery compartment;

211. a first stopper plate; 212. a pressing member;

2121. a barrel; 2122. a piston rod;

21211. a second cavity; 21212. a first cavity; 2121A, a vent hole; 2121B, and a mounting hole.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a terminal device according to an embodiment of the present application. The terminal device can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer and a navigator. As shown in fig. 1, the terminal device includes a housing 3 and a battery assembly, the housing 3 has a battery compartment 31, and the battery assembly is located in the battery compartment 31. Taking a mobile phone as an example, the housing 3 may include a middle frame and a battery cover, and the middle frame and the battery cover may be hermetically connected. Between the middle frame and the battery cover of the mobile phone, a battery compartment 31 is arranged, and the battery compartment 31 is used for installing a battery component.

The embodiment of the application provides a battery assembly, which comprises a battery body 1 and a stop part 2. As shown in fig. 1, the stopper 2 is located on at least one side of the battery body 1. The surface of the stopping element 2 opposite to the battery body 1 is a stopping surface, and the orthographic projection of the battery body 1 on the stopping surface is positioned in the stopping surface.

When the terminal device is assembled, the battery pack is mounted in the battery compartment 31 of the housing 3 and is connected to the inner wall of the battery compartment 31.

The battery body 1 may be an all-solid battery, a semi-solid battery, or a liquid battery, and is not limited herein.

When the battery body 1 is not expanded, a certain distance can exist between the stop surface of the stop assembly 2 and the surface of the battery body 1. In this case, when the battery body 1 starts to swell, the surface of the battery body 1 gradually approaches the stop surface. As the degree of expansion of the battery body 1 increases, the distance between the surface of the battery body 1 and the stopper surface becomes smaller until they come into contact with each other, forming a compression. At this time, if the battery body 1 continues to expand, the thrust member 2 applies a force to the battery body 1, which is directed toward the battery body 1, thereby suppressing the expansion of the battery and increasing the service life of the battery.

Alternatively, when the battery body 1 is not expanded, the stop surface of the stop element 2 and the surface of the battery body 1 are in contact with each other. In this case, as soon as the battery body 1 begins to swell, the stopper assembly 2 is pressed, and the stopper assembly 2 exerts an urging force directed toward the battery body 1 on the battery body 1, thereby suppressing the swelling of the battery.

In a terminal device (such as a mobile phone, a notebook computer, a tablet computer, etc.), the battery body 1 generally adopts a flat plate structure, which enables the expansion of the battery body 1 to occur in the thickness direction, for example, in the battery assembly provided by the embodiment of the present application, the stop assembly 2 may be located on at least one side of the battery body 1 in the thickness direction, and the corresponding structure is as shown in fig. 2 and fig. 3.

Alternatively, the stopper element 2 may be located on at least one side of the battery body 1 in the length direction or the width direction, and the length direction and the width direction of the battery body 1 are perpendicular to each other and to the thickness direction of the battery body 1. The battery body 1 is expanded mainly in the thickness direction, but is expanded to some extent in the longitudinal direction and the width direction, and particularly in the case of the battery body 1 having a relatively large thickness, the expansion of the battery body 1 can be further suppressed by disposing the stopper assembly 2 at least on one side in the longitudinal direction or the width direction.

Taking the battery assembly shown in fig. 2 as an example, the stopper element 2 includes a stopper element 21, and the stopper element 21 is located on one side in the thickness direction of the battery body 1. The stopper sub-assembly 21 includes a first stopper plate 211 and a pressing member 212.

As shown in fig. 2, the stopper sub-assembly 21 includes a first stopper plate 211 and a pressing member 212. The first stopper plate 211 is disposed opposite to the battery body 1, and the surface of the first stopper plate 211 opposite to the battery body 1 is the above-described stopper surface. The pressing member 212 is located on a side of the first stopper plate 211 away from the battery body 1, and is connected to the first stopper plate 211. The pressing member 212 serves to apply a force directed toward the battery body 1 to the first stopper plate 211.

When the first stopper plate 211 is pressed by the battery body 1, the pressing member 212 may apply an acting force directed toward the battery body 1 to the first stopper plate 211, balance the pressing force of the battery body 1 against the first stopper plate 211, and drive the first stopper plate 211 to apply the acting force to the battery body 1, thereby suppressing expansion of the battery body 1.

Fig. 3 is a schematic structural diagram of another battery assembly provided in the embodiment of the present application. As shown in fig. 3, in this battery pack, the stopper members 2 include two stopper members 21, and the stopper members 21 are located on both sides in the thickness direction of the battery body 1. By providing the stopper assemblies 21 on both sides in the thickness direction of the battery body 1, both sides of the battery body 1 are restricted, and the expansion of the battery body 1 is suppressed.

The stopper sub-assembly 21 is explained below:

first stopper plate 211

For the first stopper plate 211, for example, a steel plate or the like may be used to ensure good rigidity. Like this, can guarantee that first backstop board 211 can not take place deformation after receiving external force to, can not deform when guaranteeing that backstop closes piece 2 and battery body 1 and produce the extrusion, the inflation of suppression battery body 1 that can be better.

As for the thickness of the first stop plate 211, as an example, in an electronic product such as a mobile phone, the thickness of the first stop plate 211 may be 50 micrometers to 200 micrometers, for example, 80 micrometers, which is not limited herein. Generally, as the thickness of the first stop plate 211 increases, the rigidity of the first stop plate 211 also increases, but the increase of the thickness causes the first stop plate 211 to occupy more space of the battery compartment 31, and when determining the thickness of the first stop plate 211, the thickness of the battery body 1 and the size of the battery compartment 31 can be combined, which is not described herein again.

Pressure member 212

As shown in fig. 1, the stopping element 21 may include a pressing member 212, and the pressing member 212 is located at the center of the stopping surface in the orthographic projection of the stopping surface of the first stopping plate 211.

Alternatively, a skilled person may experimentally determine a position at which the battery body 1 is most expanded in the thickness direction (may be referred to as a maximum expansion point), and at this time, a connection position of the pressing member 212 and the first stopper plate 211 may be a position on a surface of the first stopper plate 211 away from the battery body 1 corresponding to the maximum expansion point. In this way, the effect of suppressing swelling of the battery body 1 can be effectively enhanced.

In other examples, the stop sub-assembly 21 may include a plurality of pressing members 212, and the plurality of pressing members 212 are uniformly distributed on a side of the first stop plate 211 away from the battery body 1. For example, as shown in fig. 4, the plurality of pressing members 212 may be equally spaced and arranged in a straight line. For example, as shown in fig. 5, the pressing members 212 may be equally spaced in the stopper surface.

In the present embodiment, the pressure member 212 may include a cylinder 2121 and a piston rod 2122. As shown in fig. 6, the end surface of one end of the cylinder 2121 has a mounting hole 2121B, and the rod body of the piston rod 2122 is inserted into the mounting hole 2121B and is in sealing fit with the mounting hole 2121B. The piston of the piston rod 2122 is disposed in the cylinder 2121 and forms a first chamber 21212 (also referred to as a rod chamber) and a second chamber 21211 (also referred to as a rodless chamber) with the inner wall of the cylinder 2121, a portion of the piston rod 2122 is disposed in the first chamber 21212, and the end of the piston rod 2122 outside the first chamber 21212 is connected to the first stopper plate 211. The cylinder 2121 has a vent hole 2121A on its wall, and the vent hole 2121A is connected to the second chamber 21211 for exchanging gas with the outside. The first chamber 21212 and the second chamber 21211 are isolated by the piston of the piston rod 2122, and the first chamber 21212 and the second chamber 21211 are not communicated.

With this structure, the battery case 31 of the terminal device has good sealing performance, the end of the barrel 2121 away from the mounting hole 2121B is connected to the inner wall of the battery case, and the barrel 2121 is communicated with the battery case 31 through the vent hole 2121A, at this time, the stop surface of the first stop plate 211 may have a certain distance from the surface of the battery body 1. When the battery body 1 expands, the volume of the battery body 1 increases, the air pressure in the battery chamber 31 increases, the rodless cavity (the second cavity 21211) is communicated with the battery chamber 31 through the vent hole 2121A, and the air pressure in the rodless cavity (the second cavity 21211) also increases, so that the piston rod 2122 is pushed to move towards the battery body 1, and the first stop plate 211 applies pressure to the battery body 1 to prevent the battery body 1 from further expanding. The higher the degree of expansion of the battery body 1, the higher the gas pressure in the battery compartment 31, and the greater the pressure applied to the battery body 1 by the first stopper plate 211.

In other examples, the pressure member 212 may be a spring, a folding spring, an air spring, etc., and is not limited herein. When a spring, a folding spring, or the like is used as the pressure member 212, the battery case 31 is not required to have good airtightness.

In addition, the pressure member 212 may be a telescopic cylinder, one end of which is connected to the first stopper plate 211, and the other end of which is used to connect to the inner wall of the battery compartment. The specifications of the telescopic cylinder may be determined according to the thickness of the battery body 1 and the size of the battery compartment 31. For example, in an electronic product such as a mobile phone, the pressing member 212 may be a micro telescopic cylinder or a mini telescopic cylinder to reduce the space occupied by the pressing member 212.

Connection of the first stop plate 211 to the pressure piece 212

The pressing member 212 is located on the side of the first stopper plate 211 away from the battery body 1, and one end of the pressing member 212 is connected to the surface of the first stopper plate 211 away from the battery body 1. The pressing member 212 and the first stop plate 211 can be fixed by riveting, welding or gluing.

Fig. 7 is a schematic structural diagram of another battery assembly provided in the embodiment of the present application. As shown in fig. 7, in the battery module, the stopper element 2 includes a connecting member 22 and two second stopper plates 23.

As shown in fig. 7, the stop assembly 2 includes a connecting member 22 and two second stop plates 23, the connecting member 21 is located between the two second stop plates 22 and is connected to the two second stop plates 22, respectively, wherein the surface of the second stop plate 22 close to the battery body 1 is a stop surface. The connecting member 22 and the second stop plate 23 may be fixed by riveting, welding or gluing, and the connecting member 22 and the second stop plate 23 may also be an integral structure. The connecting piece 22 and the two second stopper plates 22 form an accommodating space 24 therebetween, and the accommodating space 24 is used for accommodating the battery body 1.

The distance between the stop surfaces of the two second stop plates 22 may be equal to the thickness of the battery body 1, and at this time, the two surfaces of the battery body 1 in the thickness direction respectively abut against the stop surfaces of the two second stop plates 22. In this case, when the battery body 1 swells in the thickness direction, the two second stopper plates 22 can respectively apply pressure to the battery body 1 directed to the battery body 1, thereby achieving an effect of suppressing swelling of the battery body 1.

As an example, the connecting member 22 and the two second stopper plates 23 may each be a steel plate. The steel plate has higher rigidity, can guarantee that two second backstop plates 23 can not produce the deformation because of battery body 1's inflation, and when battery body 1 inflation, when extrudeing two second backstop plates 23, connecting piece 22 can provide stronger and directional battery body 1's pressure through two second backstop plates 23 to battery body 1, produces better suppression effect to battery body 1's inflation.

The thickness of the connecting element 22 and the second stop plate 23 can be selected according to the actual product requirements, and for example, in electronic products such as mobile phones, the thickness of the connecting element 22 and the thickness of the second stop plate 23 can be selected between 50 micrometers and 200 micrometers. The thickness of the connecting member 22 and the thickness of the second stopper plate 23 may be the same or different, and are not limited thereto.

In the solution provided by the embodiment of the present application, the battery assembly includes a battery body 1 and a stopping element 2, the stopping element 2 is located on at least one side of the battery body 1, and an orthographic projection of the battery body 1 on a surface of the stopping element 2 opposite to the battery body 1 is located in the surface. When the battery body 1 expands, the battery body 1 extrudes the stopping assembly 2, and the stopping assembly 2 applies an acting force to the battery body 1 along the direction pointing to the battery body 1 to inhibit the battery body 1 from further expanding, so that the service life of the battery body 1 is prolonged, and the problem that the product cannot be used due to the expansion of the battery body 1 is avoided.

Based on the same technical concept, the embodiment of the present application provides a terminal device, which includes a housing 3 and any one of the battery packs provided in the embodiments of the present application. The housing 3 has a battery compartment 31, the battery assembly is located in the battery compartment 31, and the stopping element 2 of the battery assembly is connected to the inner wall of the battery compartment 31, and the corresponding structure is shown in fig. 7. Wherein the battery assembly may be the battery assembly shown in fig. 2, 3 or 7.

For the battery assembly shown in fig. 2, in some examples, the stopper sub-assembly 21 may be located between the battery body 1 and the middle frame of the cellular phone. In this case, one surface of the battery body 1 in the thickness direction is attached to the stopper surface of the first stopper plate 211, the surface of the battery body 1 away from the first stopper plate 211 is disposed opposite to the battery cover, one end of the pressing member 212 is connected to the surface of the first stopper plate 211 away from the battery body 1, and the other end of the pressing member 212 is connected to the middle frame of the mobile phone to fix the battery pack. The surface of the battery body 1 away from the first stop plate 211 may contact with the battery cover, or may have a certain distance, which is not limited herein. When the battery body 1 swells, the stopper sub-assembly 21 and the battery cover can be used to achieve the effect of suppressing the swelling of the battery body.

In other examples, the stopper sub-assembly 21 may be located between the battery body 1 and the battery cover. In this case, one surface of the battery body 1 in the thickness direction is attached to the middle frame of the mobile phone to fix the battery body 1. Meanwhile, the stop surface of the first stop plate 211 is disposed opposite to the battery body 1, one end of the pressing member 212 is connected to the surface of the first stop plate 211 remote from the battery body 1, and the other end of the pressing member 212 is connected to the battery cover. The surface of the battery body 1 close to the first stop plate 211 may contact with the stop surface of the first stop plate 211, or may have a certain distance, which is not limited herein. At this time, when the battery body 1 swells, the stopper sub-assembly 21 and the cell phone middle frame can be used to achieve the effect of suppressing the swelling of the battery body.

For the battery assembly shown in fig. 3, one of the two stop sub-assemblies 21 is located between the battery body 1 and the middle frame of the mobile phone, and the stop surface of the stop sub-assembly 21 is attached to one surface of the battery body 1 in the thickness direction. The other of the two stopper subassemblies 21 is located between the battery body 1 and the battery cover. When the battery body 1 swells, the two stopper sub-assemblies 21 can be used to achieve the effect of suppressing the swelling of the battery body.

For the battery assembly shown in fig. 7, the surfaces of the two second stop plates 23 far away from the battery body are respectively attached to the middle frame and the battery cover of the mobile phone, and the battery body 1 is attached to the stop surface of at least one second stop plate 23 to fix the battery body 1. At this time, when the battery body 1 swells, the two second stopper plates 23 can be used to achieve the effect of suppressing the swelling of the battery body.

This scheme of adoption, backstop closes piece 2 can restrain battery body 1's inflation degree to, increase battery body 1's life, simultaneously, can avoid the problem that can't use because the terminal equipment that battery body 1 inflation leads to.

The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A battery assembly, characterized in that it comprises a battery body (1) and a stop (2);

the battery pack is characterized in that the stopping assembly (2) is positioned on at least one side of the battery body (1), the stopping assembly (2) is positioned on the surface opposite to the battery body (1), the orthographic projection of the battery body (1) is positioned in the surface, and the stopping assembly (2) can apply acting force pointing to the battery body (1).

2. The battery pack according to claim 1, wherein the battery body (1) is a flat plate structure, and the stopper piece (2) is located on at least one side in a thickness direction of the battery body (1).

3. The battery assembly according to claim 2, wherein the stopper element (2) comprises at least one stopper element (21), and the at least one stopper element (21) is disposed adjacent to a surface in the thickness direction of the battery body (1).

4. The battery assembly according to claim 3, wherein the stopper assembly (21) comprises a first stopper plate (211) and a pressing member (212), the first stopper plate (211) is arranged opposite to the battery body (1), the pressing member (212) is located on a side of the first stopper plate (211) far away from the battery body (1) and is connected to the first stopper plate (211), and the pressing member (212) applies a force to the first stopper plate (211) and is directed to the battery body (1) to drive the first stopper plate (211) to apply a force to the battery body (1).

5. The battery assembly according to claim 4, characterized in that the stopper sub-assembly (21) comprises a plurality of pressure pieces (212), the plurality of pressure pieces (212) being evenly distributed on a side of the first stopper plate (211) remote from the battery body (1).

6. A battery pack according to claim 4 or 5, characterized in that the pressure member (212) is a telescopic cylinder.

7. A battery assembly according to claim 4 or 5, characterized in that the pressure member (212) comprises a barrel (2121) and a piston rod (2122);

the end surface of one end of the cylinder body (2121) is provided with a mounting hole (2121B);

the piston of the piston rod (2122) is positioned in the cylinder body (2121) and forms a first cavity and a second cavity with the inner wall of the cylinder body (2121), the piston rod (2122) is positioned in the first cavity, and the rod body of the piston rod (2122) is inserted into the mounting hole (2121B), is in sealing fit with the mounting hole (2121B) and is connected with the first stop plate (211);

the barrel wall of the barrel body (2121) is provided with a vent hole (2121A), and the vent hole (2121A) is connected with the second cavity.

8. The battery assembly according to claim 4 or 5, characterized in that the thickness of the first stop plate (211) is 50-200 microns.

9. The battery pack according to any one of claims 3 to 5, wherein the stopper member (2) includes two stopper members (21), and the two stopper members (21) are respectively located on both sides in the thickness direction of the battery body (1).

10. The battery assembly according to claim 2, characterized in that the stop assembly (2) comprises a connecting piece (22) and two second stop plates (23), the connecting piece (22) is located between the two second stop plates (23) and is respectively connected with the two second stop plates (23);

the battery body (1) is located between the two second stop plates (23).

11. A terminal device, characterized in that the terminal device comprises a housing (3) and a battery assembly according to any one of claims 1-10, the housing (3) has a battery compartment (31), the battery assembly is located in the battery compartment (31), and the stop element (2) of the battery assembly is connected with the inner wall of the battery compartment (31).