CN216354459U

CN216354459U - Soft-packaged button type battery cell

Info

Publication number: CN216354459U
Application number: CN202122495803.7U
Authority: CN
Inventors: 吕黠物; 孙元俊
Original assignee: Wanmo Acoustics Co ltd
Current assignee: Wanmo Acoustics Co ltd
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2022-04-19
Anticipated expiration: 2031-10-15

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a soft-packaged button type battery cell which comprises a battery cell body, a first tab, a second tab and a shell, wherein the shell is provided with an accommodating groove and a skirt edge, the battery cell body is accommodated in the accommodating groove, the first tab and the second tab are both connected with the battery cell body, the outer end of the first tab and the outer end of the second tab both penetrate through the skirt edge, the skirt edge is provided with a plurality of notches, and the notches are distributed on two sides of the first tab and the second tab. Notches are punched on the two sides of the tab, and the non-tab position is embossed, so that the risk of breakage of the tab position or fracture of the tab caused by pressing the tab in the embossing process is reduced; meanwhile, the folding skirts are divided into the sectional folding edges by the plurality of gaps, so that the folding difficulty is reduced, and the production manufacturability is improved; this shirt rim structure can reduce the fold quantity of shirt rim, reduces shirt rim thickness size, can enlarge the battery and roll up a core diameter, helps promoting electric core energy density.

Description

Soft-packaged button type battery cell

Technical Field

The utility model belongs to the technical field of batteries, and particularly relates to a soft-packaged button type battery cell.

Background

The button type soft package battery cell shell in the TWS earphone is an aluminum plastic film, and is usually in a double-pit structure. The conventional preparation process of the battery cell comprises the following steps: and after the winding of the winding core is finished, putting the winding core into one piece of the aluminum-plastic film subjected to pit punching, covering the other piece of the aluminum-plastic film subjected to pit punching, and finishing packaging in a heat sealing mode. This method of operation has several drawbacks:

first, tab compound may extend beyond the body after crimping, resulting in interference during assembly. Because the tab needs to be led out from the middle position of the side edge of the battery cell and tab glue is arranged on the tab, the height of the tab glue is easy to exceed the main body of the battery cell after bending, so that the risk of dimension exceeding in the thickness direction of the battery cell exists; during the assembling process of the TWS earphone, interference with other parts can be generated, and the assembling is difficult;

second, the package width is limited and there is a risk of insufficient sealing. Because the thickness of the soft-package button-type battery cell is smaller, the tab is led out from the middle position of the side edge of the battery cell, the width of the skirt edge is the highest and is not allowed to be more than half of the height of the battery cell, and the sealing width is limited at the moment, so that the problem of poor packaging is possibly caused;

thirdly, the cell main body or tab glue can be damaged by the skirt edge embossing process, which causes leakage; because the skirt edge of the battery cell needs to be embossed before the edge folding, when the circular embossing die is pressed down and positioned inaccurately, the main body of the battery cell or the lug glue packaging position is easily crushed, the damage of the aluminum plastic film is caused, and liquid leakage is caused.

In view of the above, the related art needs to be perfected.

SUMMERY OF THE UTILITY MODEL

The utility model aims to: the utility model provides a soft-packaged button type battery cell, which aims to solve the problems that the button type battery cell is difficult to assemble and bad in packaging and the tab is easy to damage and leak.

The utility model provides a soft-packaged buckled cell which comprises a cell body, a first tab, a second tab and a shell, wherein the shell is provided with an accommodating groove and a skirt edge, the cell body is accommodated in the accommodating groove, the first tab and the second tab are both connected with the cell body, the outer end of the first tab and the outer end of the second tab both penetrate through the skirt edge, the skirt edge is provided with a plurality of notches, and the notches are distributed on two sides of the first tab and/or the second tab.

In one embodiment, the first tab and the second tab are both connected to the same end surface of the cell body.

In one embodiment, the housing is an aluminum-plastic film, and the housing is of a single-pit structure.

In one embodiment, the first tab and the second tab are both connected to an end surface of the cell body, which is far away from the bottom of the pit.

In one embodiment, the number of the notches is four, two of the notches are distributed on two sides of the first tab, and the other two notches are distributed on two sides of the second tab.

In one embodiment, the regions of the skirt on either side of the gap are of different widths.

In one embodiment, the depth of the accommodating groove is not more than 6 mm.

In one embodiment, the skirt has a width no greater than 6mm and the skirt has a width no greater than the height of the housing.

In one embodiment, the skirt edge is provided with an embossed structure, and the embossed structure is distributed on two sides of the first tab and the second tab.

In one embodiment, the cell body comprises a positive plate, a diaphragm and a negative plate which are arranged in a winding or stacking mode.

The utility model has the beneficial effects that: in application, as the notches are arranged on the skirt edges at the two sides of the first tab and the second tab (namely the positive tab and the negative tab), the edge folding difficulty is reduced, and the production efficiency of the product is effectively improved; the number of the notches is more than or equal to 2, the notches are in a triangular shape, the notches are flexibly arranged according to the actual production requirements, after the battery cell is packaged, notches are punched on two sides of a first tab and a second tab (namely a positive tab and a negative tab) of a skirt edge, the positions of the non-tabs are embossed, and the scheme does not emboss the positions of the tabs, so that the risk of breakage of the tabs or breakage of the tabs caused by pressing the tabs in the embossing process is favorably reduced; meanwhile, the skirt edge is divided into the sectional folded edges by the plurality of gaps, so that the folding difficulty is reduced, and the production manufacturability is favorably improved; this shirt rim structure can reduce the fold quantity of shirt rim, reduces shirt rim thickness size, can enlarge electric core body diameter, helps promoting electric core energy density.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is one of schematic structural diagrams of a soft-package button-type battery cell in an embodiment of the present invention;

fig. 2 is a second schematic structural diagram of a soft-package button-type battery cell in the embodiment of the present invention;

fig. 3 is a third schematic structural diagram of a soft-package button-type battery cell in the embodiment of the utility model;

fig. 4 is one of schematic partial structural diagrams of a soft-packaged button-type battery cell according to an embodiment of the present invention;

fig. 5 is a second schematic diagram of a local structure of a soft-package button-type battery cell according to an embodiment of the present invention;

fig. 6 is a third schematic view of a local structure of the soft-packaged button-type battery cell in the embodiment of the present invention.

Fig. 7 is a fourth schematic view of a partial structure of a soft-packaged button-type battery cell according to an embodiment of the present invention.

Wherein: 1. a cell body; 2. a first tab; 3. a second tab; 4. a housing; 41. a first housing; 42. a second housing; 43. a containing groove; 44. a skirt edge; 441. a notch; 5. first tab glue; 6. and a second ear glue.

Detailed Description

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, within which a person skilled in the art can solve the technical problem to substantially achieve the technical result.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The present invention will be described in further detail below with reference to the accompanying drawings, but the present invention is not limited thereto.

Referring to fig. 1 to 3, an embodiment of the present application provides a soft-packaged button type battery cell, including a battery cell body 1, a first tab 2, a second tab 3, and a housing 4, where the housing 4 is provided with a receiving groove 43 and a skirt 44, the battery cell body 1 is received in the receiving groove 43, the first tab 2 and the second tab 3 are both connected to the battery cell body 1, the outer end of the first tab 2 and the outer end of the second tab 3 both pass through the skirt 44, the skirt 44 is provided with a plurality of notches 441, and the notches 441 are distributed on both sides of the first tab 2 and the second tab 3.

In application, the skirt edges 44 on the two sides of the first pole lug 2 and the second pole lug 3 are provided with the notches 441, and the notches 441 are uniformly distributed on the two sides of the first pole lug 2 and the second pole lug 3, so that the skirt edges 44 are of a sectional type edge folding structure, edge folding difficulty is reduced, and production efficiency of products is effectively improved; the number of the notches 441 is more than or equal to 2, if the number of the notches 441 is 2, 2 notches 441 are arranged on two sides of the same tab, the shape of the notches 441 includes but is not limited to a triangle, the notches are flexibly arranged according to the actual production requirement, in the production, after the battery cell body 1 is sealed with the skirt 44, the notches 441 are punched on the skirt 44 on two sides of the first tab 2 and the second tab 3, so that the first tab 2 position and the second tab 3 position, and the non-first tab 2 position and the non-second tab 3 position are separately packaged; the skirt edge 44 in the application is divided into the sectional type folding edge structures by the notches 441, so that the difficulty of folding edge production in production is reduced, and the production efficiency is improved; the skirt 44 structure can reduce the number of folds of the skirt 44, reduce the thickness of the skirt 44, facilitate the increase of the size of the cell body 1, and facilitate the increase of the energy density of the cell body 1; the first casing 41 or the second casing 42 is provided with the accommodating groove 43, which is a single pit (accommodating cavity) packaging process, thereby improving the product packaging effect and reducing the risk of assembly interference caused by excessive accumulation of tab glue.

Referring to fig. 1 to 2, in an embodiment, a first tab 2 and a second tab 3 are both connected to a same end surface of a cell body 1.

In application, the first tab 2 and the second tab 3 are both connected with the same end surface of the cell body 1, wherein the same end surface refers to the same side surface, the cell body 1 is of a three-dimensional structure and has different side surfaces, the first tab 2 and the second tab 3 are connected with the same side surface, the cell body 1 is preferably of a roll core structure, the first tab 2 and the second tab 3 are both connected with the same end surface of the cell body 1, production and manufacturing are facilitated, and production efficiency is greatly improved in batch production; and is favorable for being connected with electric equipment to supply power when in use.

In one embodiment, the casing 4 is an aluminum-plastic film, the casing 4 is a single-pit structure, and the first tab 2 and the second tab 3 are both connected to the end surface of the cell body 1, which is far away from the pit bottom.

In application, the shell 4 is an aluminum-plastic film, which is beneficial to improving the energy density of the whole battery; the shell 4 is of a single-pit structure, and the first lug 2 and the second lug 3 are connected with the end face, far away from the pit bottom, of the battery cell body 1, so that space saving is facilitated.

Referring to fig. 2, in one embodiment, the first tab 2 and the second tab 3 are both bent structures.

In application, the first tab 2 and the second tab 3 are both designed to be bent structures, which is beneficial to reducing the overall length so as to be conveniently installed in an earphone; the first tab 2 and the second tab 3 both penetrate through the skirt 44, the skirt 44 is arranged as the positive electrode or the negative electrode of the battery core, which is beneficial to better package the battery, and at this time, the skirt 44 is also of a bending type structure, and the difficulty of bending the skirt 44 is greatly reduced because the skirt 44 is provided with a plurality of notches 441.

Preferably, the first tab 2 and the second tab 3 are both bent into L-shaped structures, which is beneficial to shortening the overall size.

Referring to fig. 4-7, in one embodiment, the skirt 44 has different widths in the regions on both sides of the gap 441.

In application, the width of the skirt 44 of a common battery is a fixed value, and the skirt 44 cannot be too wide due to the limited size of the button battery in the height direction, otherwise the skirt is easy to exceed the main body of the battery, and the assembly of the battery is affected; meanwhile, the width of the skirt edge 44 cannot be too small, and when the width is too small, the packaging effect is difficult to guarantee, so that the width of the skirt edge 44 related to the present application is different between the tab positions (i.e., the first tab 2 position and the second tab 3 position) and the non-tab positions (i.e., the non-first tab 2 position and the non-second tab 3 position); the width of the skirt edge 44 at the tab position (i.e. the position of the first tab 2 and the position of the second tab 3) may be greater than that of the non-tab position (i.e. the position of the non-first tab 2 and the position of the non-second tab 3) or less than that of the non-tab position (i.e. the position of the non-first tab 2 and the position of the non-second tab 3), the packaging tension at the wider position of the skirt edge 44 may be generally greater than that at other positions, and when the internal pressure of the battery rises, the internal pressure of the battery may be relieved through the narrower position of the width of the skirt edge 44, thereby facilitating the improvement of the safety performance of the battery.

Referring to fig. 1 to 2, in an embodiment, the depth of the accommodating groove 43 is not greater than 6 mm.

In the application, the volume of earphone is very little, and consequently the whole volume design of battery is very little, and the volume design of battery body is very little, and electric core body 1 is that the card is put and is fixed in storage tank 43, designs into the degree of depth of storage tank 43 to be not more than 6mm and is favorable to installing the battery in the earphone.

Referring to fig. 1-7, in one embodiment, the width of the skirt 44 is no greater than 6mm, and the width of the skirt 44 is no greater than the height of the housing 4.

In use, the earphone is very small, the skirt 44 is bent to reduce the overall size, the width of the skirt 44 is not more than 6mm, and the width of the skirt 44 is not more than the height of the casing 4, which is advantageous for reducing the overall size of the battery and for mounting the battery in the earphone.

In one embodiment, the skirt 44 is provided with an embossed structure distributed on both sides of the first and

second tabs

2 and 3.

In application, the encapsulation of the position of a first tab 2 and the position of a second tab 3 is completed firstly, and then the encapsulation of the position of a non-first tab 2 and the position of a non-second tab 3 are completed and embossed; because the production process does not emboss the positions of the first lug 2 and the second lug 3, the risk that the first lug 2 and the second lug 3 are crushed in the embossing process to cause damage or fracture of the positions of the first lug 2 and the second lug 3 is reduced.

Referring to fig. 1 to 7, in one embodiment, the first tab 2 is connected to the housing 4 through a first tab glue 5, and the second tab 3 is connected to the housing 4 through a second tab glue 6.

In application, the first tab glue 5 bonds the first tab 2 and the shell 4 together to play a role in packaging, and also plays a role in fixing the first tab 2 on the shell 4; the second lug glue 6 is used for bonding the second lug 3 and the shell 4 together to play a role in encapsulation and fixing the second lug 3 on the shell 4; this kind of structural design is favorable to increasing the stability of first utmost point ear 2 and second utmost point ear 3 in the work, owing to adopt single hole structure, the width of shirt rim 44 is widened for even first utmost point ear is glued 5 and second utmost point ear and is glued 6 and expose when more, also can not surpass shell 4, can effectively reduce the assembly interference risk that the super specification of electric core body 1 thickness leads to, has promoted the degree of assemblability of electric core body 1.

Referring to fig. 2, in one embodiment, the outer end of the skirt 44 is disposed in abutment with the housing 4.

In use, the smaller the gap between the outer end of the skirt 44 and the housing 4, the better, the smaller the gap and the smaller the cell volume, which is advantageous for minimizing the cell volume when the outer end of the skirt 44 is placed in abutment with the housing 4.

In one embodiment, the cell body 1 includes a positive electrode sheet, a separator, and a negative electrode sheet, which are wound or stacked.

In application, the winding type battery or the laminated type battery in the scheme can be applicable, and the application range is wide.

Referring to fig. 2, in an embodiment, the housing 4 includes a first housing 41 and a second housing 42 connected to the first housing 41, and the accommodating groove 43 is disposed on the first housing 41 or the second housing 42.

In application, the housing 4 has a single-pit structure, wherein the first shell 41 has a non-pit-punching structure, and the second shell 42 has a pit-punching structure; alternatively, the second housing 42 has a pit-punching-free structure and the first housing 41 has a pit-punching structure, and the arrangement is flexible according to actual conditions. The first casing 41 and the second casing 42 are packaged by hot melting, and after packaging, a skirt 44 is formed at the position of the sealed edge by an embossing process. Compared with a double-pit structure, the single-pit structure can design the skirt 44 along the height extension direction of the cell body 1 to be larger (wider) without increasing the volume of the earphone, and the wider skirt 44 enables the seal between the first casing 41 and the second casing 42 to be wider due to the seal on the skirt 44; the encapsulation is accomplished through the heat-seal between first casing 41 and the second casing 42, and after the seal between first casing 41 and the second casing 42 is widened, electric core encapsulation effect can be effectively promoted, and electric core weeping risk is reduced.

Referring to fig. 1 to 2, in one embodiment, the first tab 2 passes through a connection region between the first housing 41 and the second housing 42, and the second tab 3 passes through a connection region between the first housing 41 and the second housing 42.

In application, firstly, the cell body 1 is placed in the accommodating groove 43, then the first shell 41 and the second shell 42 are covered, at this time, the first tab 2 and the second tab 3 are located between the first shell 41 and the second shell 42 and extend out from a connecting area between the first shell 41 and the second shell 42, the design is favorable for simplifying production, and the efficiency of batch production is greatly improved.

The above are merely alternative embodiments of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. The utility model provides a soft packet of knot formula electricity core which characterized in that: the battery cell comprises a battery cell body (1), a first tab (2), a second tab (3) and a shell (4), wherein the shell (4) is provided with an accommodating groove (43) and a skirt edge (44), the battery cell body (1) is accommodated in the accommodating groove (43), the first tab (2) and the second tab (3) are connected with the battery cell body (1), the outer end of the first tab (2) and the outer end of the second tab (3) penetrate through the skirt edge (44), the skirt edge (44) is provided with a plurality of notches (441), and the notches (441) are distributed on two sides of the first tab (2) and/or the second tab (3).

2. The soft-packaged button-type battery cell according to claim 1, characterized in that: the first pole lug (2) and the second pole lug (3) are connected with the same end face of the battery cell body (1).

3. The soft-packaged button-type battery cell according to claim 1, characterized in that: the shell (4) is an aluminum-plastic film, and the shell (4) is of a single-pit structure.

4. The soft-packaged button cell of claim 3, wherein: the first pole lug (2) and the second pole lug (3) are connected with the end face, far away from the pit bottom, of the battery cell body (1).

5. The soft-packaged button-type battery cell according to claim 1, characterized in that: the number of the notches (441) is four, wherein two notches (441) are distributed on two sides of the first pole lug (2), and the other two notches (441) are distributed on two sides of the second pole lug (3).

6. The soft-packaged button cell according to any of claims 1 to 5, characterized in that: the width of the skirt (44) is different in the regions on both sides of the notch (441).

7. The soft-packaged button-type battery cell according to claim 1, characterized in that: the depth of the accommodating groove (43) is not more than 6 mm.

8. The soft-packaged button-type battery cell according to claim 1, characterized in that: the width of the skirt edge (44) is not more than 6mm, and the width of the skirt edge (44) is not more than the height of the shell (4).

9. The soft-packaged button cell of claim 6, wherein: the skirt edge (44) is provided with an embossing structure, and the embossing structure is distributed on two sides of the first pole lug (2) and the second pole lug (3).

10. The soft-packaged button-type battery cell according to claim 1, characterized in that: the battery cell body (1) comprises a positive plate, a diaphragm and a negative plate which are arranged in a winding or stacking mode.