CN214672783U

CN214672783U - Battery and electric equipment

Info

Publication number: CN214672783U
Application number: CN202120609193.6U
Authority: CN
Inventors: 何永伟; 麻昊; 黄小钊; 陈远胜
Original assignee: Dongguan Nvt Technology Co Ltd
Current assignee: Dongguan Nvt Technology Co Ltd
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2021-11-09
Anticipated expiration: 2031-03-25

Abstract

A battery includes a case, an electrode assembly, and tabs. The housing includes a main body portion and a sealing portion connected to the main body portion. The electrode assembly is disposed within the main body portion. A tab is electrically connected to the electrode assembly, and one end of the tab protrudes from the case in a first direction from the sealing part. The main body part comprises a top surface, a first surface and a second surface, wherein the first surface and the second surface are oppositely arranged along a second direction, the second direction is vertical to the first direction, concave parts are formed on two sides of the first surface, the sealing part comprises side sealing parts located on the side edges of the main body part, and the side sealing parts are arranged in the concave parts; the sealing part also comprises a top sealing part intersected with the side sealing part, and the top sealing part is bent towards the second surface and is fixed on the top surface in a bent mode so as to improve the energy density of the battery. The application also provides an electric device with the battery.

Description

Battery and electric equipment

Technical Field

The present disclosure relates to the field of electrochemical devices, and more particularly, to a battery and an electric device having the same.

Background

The packaging process of the soft package battery generally comprises the steps of punching a groove with the size corresponding to that of an electrode assembly on the whole flat soft package shell, then loading the electrode assembly into the groove, correspondingly folding the package shell to cover the electrode assembly, then injecting liquid, and carrying out heat sealing treatment on the top edge and the side edge of the package shell.

At present, with the miniaturization of electronic products, the installation space of the battery is more and more limited. In the prior art, the sealed edge of the packaging shell is folded to reduce the size of the battery. In the conventional folding and sealing scheme, as shown in fig. 9, when the width of the side sealing edges 121 ' and 122 ' is large, the side sealing edges protrude out of the surface of the package case, which results in an increase in the external dimension of the battery, reduces the energy density of the battery, and is not beneficial to the miniaturization of the battery, and the corner position where the top sealing 123 ' is connected with the side sealing edges is prone to stress concentration, which causes the package case to be easily damaged.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present application provides a battery and an electric device having the battery, wherein the recessed portion is disposed on the first surface of the main body of the housing, and the partial sealing portion is disposed on the recessed portion, so as to prevent the sealing portion from protruding from the first surface, and the top sealing portion is bent on the top surface of the housing, thereby further reducing the occupied space of the sealing portion, increasing the energy density of the battery, and facilitating the miniaturization of the battery.

Embodiments of the present application provide a battery including a case, an electrode assembly, and tabs. The housing includes a main body portion and a sealing portion connected to the main body portion. The electrode assembly is disposed within the body portion. The tab is electrically connected to the electrode assembly, and one end of the tab protrudes from the sealing part out of the case in a first direction. The main part includes a top surface, and first surface and the second surface that sets up along the second direction relatively, the second direction with first direction is perpendicular, the top surface is connected first surface and second surface, utmost point ear is located the top surface, the both sides of first surface are formed with the depressed part, the sealing includes being located the side seal portion of main part side, the side seal portion is located the depressed part. The sealing part further comprises a top sealing part intersected with the side sealing part, and the top sealing part is bent towards the second surface and is fixed on the top surface in a bending mode.

In some embodiments, the side sealing portion includes a first sealing portion and a second sealing portion disposed opposite to each other along a third direction, the third direction is perpendicular to the first direction and the second direction in pairs, along the third direction, two concave portions are respectively formed on two opposite sides of the first surface, and the first sealing portion and the second sealing portion are respectively disposed on the two concave portions.

In some embodiments, in the second direction, a lower surface of the first sealing portion is affixed to a bottom surface of the recess, and an upper surface of the first sealing portion is flush with the first surface.

In some embodiments, the free ends of the first sealing portion and the second sealing portion are further provided with an edge sealing glue for sealing the housing and fixing the first sealing portion to the recess.

In some embodiments, a width of the recess is greater than or equal to a width of the first seal portion along the third direction.

In some embodiments, the tab extends out of the casing from the top sealing part, and the battery further comprises a sealant, wherein the sealant is arranged between the tab and the top sealing part.

In some embodiments, the first and second seals intersect the overseal on a side of the overseal facing away from the top surface.

In some embodiments, the battery further comprises an adhesive disposed between the first surface and the seal.

In some embodiments, the depth of the recess is greater than or equal to the thickness of the seal portion along the second direction.

An embodiment of the present application provides an electric device including the battery according to the above embodiment.

The application provides a battery sets up the depressed part through the first surface at the main part of casing to locate the depressed part with partial sealing, and bend the tip seal at the casing top surface, further reduce the occupation space of sealing, promote the energy density of battery, be favorable to the miniaturized development of battery.

Drawings

Fig. 1 is a schematic structural diagram of a battery in one embodiment.

Fig. 2 is a schematic view of an unfolded structure of the battery shown in fig. 1.

Fig. 3 is a schematic view of a structure of the battery shown in fig. 2 after the sealing part is partially bent.

Fig. 4 is a schematic structural view illustrating the sealing part of the battery shown in fig. 3 being received in the recess of the case.

Fig. 5 is a bottom view of the cell shown in fig. 4.

Fig. 6 is a schematic structural view of the battery shown in fig. 4 after the sealing part is completely encapsulated.

Fig. 7 is a schematic view of a development of the battery in another embodiment.

Fig. 8 is a schematic diagram of a powered device in an embodiment.

Fig. 9 is a schematic diagram of a battery in the prior art.

Description of the main element symbols:

the specific implementation mode is as follows:

the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

A battery includes a case, an electrode assembly, and tabs. The housing includes a main body portion and a sealing portion connected to the main body portion. The electrode assembly is disposed within the body portion. The tab is electrically connected to the electrode assembly, and one end of the tab protrudes from the sealing part out of the case in a first direction. The main part includes a top surface, and first surface and the second surface that sets up along the second direction relatively, the second direction with first direction is perpendicular, the top surface is connected first surface and second surface, utmost point ear is located the top surface, the both sides of first surface are formed with the depressed part, the sealing includes being located the side seal portion of main part side, the side seal portion is located the depressed part. The sealing part further comprises a top sealing part intersected with the side sealing part, and the top sealing part is bent towards the second surface and is fixed on the top surface in a bending mode.

The first surface of the main body part of the shell is provided with the concave part, part of the sealing part is arranged in the concave part, the top sealing part is bent on the top surface of the shell, the occupied space of the sealing part is further reduced, the energy density of the battery is improved, and the miniaturization development of the battery is facilitated.

Some embodiments of the present application are described in detail. In the following embodiments, features of the embodiments may be combined with each other without conflict.

Referring to fig. 1 and 2, in one embodiment, a battery 100 includes a case 10, an electrode assembly, and tabs 20. The housing 10 includes a main body portion 11 and a sealing portion 12 connected to the main body portion 11. The electrode assembly is provided in the main body portion 11. The tab 20 is electrically connected to the electrode assembly, and one end of the tab 20 protrudes from the case 10 in a first direction from the sealing part 12. In the embodiment of the present application, the first direction is a length direction of the battery 100, which is a direction indicated by an arrow a in fig. 1. The material of the housing 10 includes, but is not limited to, aluminum plastic film and the like.

Specifically, the main body 11 includes a top surface 113, and a first surface 111 and a second surface 112 oppositely disposed along the second direction. The top surface 113 connects the first surface 111 and the second surface 112. The second direction is perpendicular to the first direction, and the second direction is a thickness direction of the battery 100, which is a direction indicated by an arrow B in fig. 1. The tab 20 is located on the top surface 113, recessed portions 114 are formed on two sides of the first surface 111, and the sealing portion 12 is partially disposed in the recessed portions 114.

With continued reference to fig. 3, 4 and 5, the sealing portion 12 includes a side sealing portion at the side of the main body portion 11 and a top sealing portion 123 intersecting the side sealing portion. The side seal portion includes a first seal portion 121 and a second seal portion 122, and the first seal portion 121 and the second seal portion 122 are disposed opposite to each other along a third direction. The third direction is perpendicular to the first direction and the second direction two by two, is the width direction of the battery 100, and is the direction indicated by the arrow C in fig. 1. The top seal portion 123 is located on the top surface 113, and the first seal portion 121 and the second seal portion 122 partially intersect with the top seal portion 123. In the second direction, the distance between the overseal 123 and the first surface 111 is smaller than the distance between the overseal 123 and the second surface 112.

Along the third direction, two concave portions 114 are respectively formed on two opposite sides of the first surface 111. The first sealing portion 121 and the second sealing portion 122 are first subjected to a shaping process to maintain the surface flatness of the sealing portion 12, and then the first sealing portion 121 and the second sealing portion 122 are bent from a horizontal initial position to a second direction by 90 °, and then bent to a first surface 111 by 90 °, so that the first sealing portion 121 and the second sealing portion 122 are respectively disposed in the two recesses 114, thereby performing a packaging process of the battery 100. The lower surfaces of the first sealing part 121 and the second sealing part 122 are attached to the bottom surface of the recess 114, and the upper surfaces of the first sealing part 121 and the second sealing part 122 are flush with the first surface 111, so that the sealing part 12 is prevented from protruding out of the first surface 111, the surface flatness of the main body part 11 is ensured, the occupied space of the sealing part 12 is reduced, and the energy density of the battery 100 is improved.

The battery 100 further includes an adhesive 30, and the adhesive 30 is disposed between the first surface 111 and the sealing part 12. Specifically, the adhesive 30 is disposed between the first sealing portion 121 and the recess 114, and between the second sealing portion 122 and the recess 114. The adhesive member 30 includes, but is not limited to, a material having adhesiveness such as a hot melt adhesive, a heat conductive adhesive, a UV adhesive, and the like. Before the first sealing part 121 and the second sealing part 122 are arranged in the recess 114, the adhesive member 30 is dripped into the recess 114 through a dispenser, after the first sealing part 121 and the second sealing part 122 are arranged in the recess 114, the bending device presses the first sealing part 121 and the second sealing part 122 for a certain time, so as to ensure that the first sealing part 121 and the second sealing part 122 are fixed in the recess 114.

In the embodiment of the present application, the depth of the recess 114 is greater than or equal to the thickness of the sealing part 12 along the second direction, so as to prevent the sealing part 12 from protruding from the first surface 111, which affects the energy density of the battery 100. Along the third direction, the width of the first sealing portion 121 is substantially the same as the width of the second sealing portion 122, and the width of the recess 114 is greater than or equal to the width of the first sealing portion 121, so that the first sealing portion 121 and the second sealing portion 122 are smoothly accommodated in the recess 114, the case 10 is reduced in the case that the surface is not flat, and the energy density of the battery 100 is improved.

Referring to fig. 6, after the first sealing portion 121 and the second sealing portion 122 are disposed in the recess 114, the bending device bends and presses the top sealing portion 123 toward the second surface 112, so that the top sealing portion 123 is bent and fixed on the top surface 113, thereby completing the packaging process of the top of the battery 100 and reducing the length of the battery 100. After the packaging process is completed, the intersecting portions of the first sealing portion 121, the second sealing portion 122 and the top sealing portion 123 are located on the side, away from the top surface 113, of the top sealing portion 123, the bending structure of the sealing portion 12 at the top surface 113 is simplified, the risk of stress concentration on the sealing portion 12 is reduced, meanwhile, the space occupied by the sealing portion 12 at the top surface 113 is also reduced, and the energy density of the battery 100 is improved.

Referring to fig. 1 and 6 again, after the top sealing portion 123 is bent, the tab 20 is bent in a first direction, so that the tab 20 is electrically connected to an external device. The tab 20 extends out of the top sealing part 123 of the casing 10, the battery 100 further includes a sealant 40, and the sealant 40 is disposed between the tab 20 and the top sealing part 123. The sealant 40 includes, but is not limited to, a material having adhesiveness such as a hot melt adhesive, a heat conductive adhesive, a UV adhesive, and the like.

Referring to fig. 7, in an embodiment, the free ends of the first sealing portion 121 and the second sealing portion 122 are further provided with an edge sealing adhesive 50. When the free end of the first seal portion 121 is the seal portion 12, the first seal portion 121 is the end away from the main body portion 11. When the free end of the second sealing portion 122 is the end of the sealing portion 12, the second sealing portion 122 faces away from the main body portion 11. The edge sealing glue 50 is applied in a first direction to seal the first sealing part 121 and the second sealing part 122. The edge sealing adhesive 50 is used to seal the housing 10, and fix the first sealing part 121 and the second sealing part 122 to the recess 114 after the first sealing part 121 and the second sealing part 122 are bent.

Referring to fig. 8, the present application further provides an electric device 200, where the electric device 200 includes the battery 100 according to the above embodiment. The electric device 200 includes, but is not limited to, a mobile phone, a computer, a player, and other portable electronic devices.

Although the present application has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the present application.

Claims

1. A battery, comprising:

a housing including a main body portion and a sealing portion connected to the main body portion;

an electrode assembly disposed within the body portion;

a tab electrically connected to the electrode assembly, one end of the tab protruding from the sealing part out of the case in a first direction;

the tab is located on the top surface, recessed portions are formed on two sides of the first surface, the sealing portion comprises side sealing portions located on the side edges of the main body portion, and the side sealing portions are arranged in the recessed portions;

the sealing part further comprises a top sealing part intersected with the side sealing part, and the top sealing part is bent towards the second surface and is fixed on the top surface in a bending mode.

2. The battery of claim 1, wherein the side seal includes a first seal portion and a second seal portion disposed opposite each other along a third direction, the third direction being perpendicular to the first direction and the second direction in pairs, two of the recessed portions being formed on opposite sides of the first surface along the third direction, the first seal portion and the second seal portion being disposed in the two recessed portions, respectively.

3. The battery of claim 2, wherein a lower surface of the first sealing portion is affixed to a bottom surface of the recess portion along the second direction, and an upper surface of the first sealing portion is flush with the first surface.

4. The battery of claim 2, wherein the free ends of the first and second sealing portions are further provided with a sealing glue for sealing the case and securing the first sealing portion to the recess.

5. The battery of claim 2, wherein a width of the depression is greater than or equal to a width of the first seal portion in the third direction.

6. The battery of claim 3 wherein said tabs extend from said top seal through said housing, said battery further comprising a sealant disposed between said tabs and said top seal.

7. The battery of claim 2, wherein the first seal and the second seal intersect the overseal on a side of the overseal that faces away from the top surface.

8. The battery of claim 1, further comprising an adhesive disposed between the recessed portion and the sealing portion.

9. The battery of claim 1, wherein a depth of the depression is greater than or equal to a thickness of the seal along the second direction.

10. An electrical consumer, characterized in that the electrical consumer comprises a battery according to any one of claims 1-9.