CN213124575U

CN213124575U - Soft package button cell

Info

Publication number: CN213124575U
Application number: CN202021610567.8U
Authority: CN
Inventors: 朱会方; 王淼; 胡大林; 郭玉杰
Original assignee: Springpower Technology Shenzhen Co Ltd
Current assignee: Springpower Technology Shenzhen Co Ltd
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2021-05-04
Anticipated expiration: 2030-08-04

Abstract

The utility model belongs to the technical field of batteries, and relates to a soft package button battery, which comprises a pole core and a soft package shell; the pole core is packaged in a soft package shell; a first tab and a second tab with opposite polarities are led out of the pole core; the first tab and the second tab respectively penetrate out of the soft package shell; the outer end of the first tab is provided with a first electrode part matched with the first end face of the soft package shell in shape, and the first electrode part is fixedly attached to the first end face of the soft package shell; and a second electrode part matched with the shape of the second end face of the soft package shell is arranged at the outer end of the second tab, and the second electrode part is attached and fixed on the second end face of the soft package shell. First electrode portion and second electrode portion directly act as soft packet of button cell's conductive electrode, and the utmost point ear can be connected through the mainboard contact of electrode portion with electronic product, has improved the convenience of electronic product with soft packet of button cell in the equipment process to can avoid the adverse effect that high temperature caused soft packet of button cell's outward appearance and performance when the welding.

Description

Soft package button cell

Technical Field

The utility model belongs to the technical field of the battery, especially, relate to a soft packet of button cell.

Background

Pouch cells are cells that employ a polymer, typically an aluminum plastic film, as a housing. Compared with a hard-shell battery, the soft-package battery mainly has the following advantages:

(1) the safety is good, and laminate polymer battery adopts the plastic-aluminum membrane packing structurally, and when taking place thermal management out of control or puncture, the plastic-aluminum membrane shell can provide buffer space for electric core, takes place the bulging deformation, and only can catch fire or smoke finally, nevertheless can not explode.

(2) The soft-package battery is lighter than a steel-shell battery with the same capacity by 40% and lighter than an aluminum-shell battery by 20%, so that the soft-package battery generally has higher energy density.

(3) The electrochemical performance is good, the service life is long, the internal resistance of the soft package battery is small, the self-consumption of the battery can be greatly reduced, and the cycle life of the soft package battery is longer.

Soft pouch button cells are a form of soft pouch cells. The existing soft package button cell comprises a winding core and an aluminum-plastic composite membrane shell coated outside the winding core, and can be used in electronic products such as earphones and the like. At present, most of soft package button batteries are assembled with electronic products in a welding mode in the soft package button market. For example, when soft-package button cell and earphone equipment, adopt the mode of tin soldering or lead wire with soft-package button cell's utmost point ear welding to the earphone mainboard, need pass through the welding temperature more than high temperature 300 ℃ at welded in-process, when the welding point is nearer from the surface of plastic-aluminum composite membrane casing, can influence the outward appearance and the performance of plastic-aluminum composite membrane casing.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the problem that the appearance and the performance of the soft-package button cell can be influenced when the lug of the existing soft-package button cell is welded on an electronic product in a welded mode is solved.

In order to solve the technical problem, an embodiment of the utility model provides a soft-package button battery, which comprises a pole core and a soft-package shell; the pole core is encapsulated in the soft package shell; the pole core is led out of a first pole lug and a second pole lug which are opposite in polarity; the first tab penetrates out of the soft package shell from a first leading-out position of the soft package shell, and the second tab penetrates out of the soft package shell from a second leading-out position of the soft package shell;

the outer end of the first tab is provided with a first electrode part matched with the first end face of the soft package shell in shape, and the first electrode part is fixedly attached to the first end face of the soft package shell;

and a second electrode part which is matched with the shape of the second end face of the soft package shell is arranged at the outer end of the second tab, and the second electrode part is attached and fixed to the second end face of the soft package shell.

Optionally, the first electrode portion entirely covers the first end face.

Optionally, the second electrode portion entirely covers the second end face.

Optionally, the first electrode part and the first tab are integrally formed; the second electrode portion is integrally formed with the second electrode tab.

Optionally, the first electrode portion is bonded to the first end face of the soft package housing through a first adhesive layer, and the second electrode portion is bonded to the second end face of the soft package housing through a second adhesive layer.

Optionally, the difference between the first lead-out position and the second lead-out position is 180 ° on the circumference, the outer end of the first tab is bent toward the first end face of the soft package shell, and the outer end of the second tab is bent toward the second end face of the soft package shell.

Optionally, the softly packaged button battery further comprises an internal support structure arranged in the softly packaged shell, and a through hole penetrating through two end faces of the pole core is formed in the axis of the pole core; the inner supporting structure comprises a first supporting plate, a second supporting plate and a supporting column, the first supporting plate and the second supporting plate are respectively located outside two end faces of the pole core, the supporting column penetrates through the through hole, and two ends of the supporting column are respectively fixedly connected with the first supporting plate and the second supporting plate.

Optionally, the area supported by the inner support structure covers the first electrode portion and the second electrode portion.

Optionally, the support column is a hollow structure.

Optionally, the first support plate, the second support plate and the support column are of an integrally formed structure, or the first support plate, the second support plate and the support column are formed respectively.

The embodiment of the utility model provides a soft-packaged button battery, through be provided with the first electrode portion of shape looks adaptation with the first terminal surface of soft-packaged shell in the outer end of first utmost point ear to laminate first electrode portion and fix on the first terminal surface of soft-packaged shell; the outer end of the second electrode lug is provided with a second electrode part matched with the shape of the second end face of the soft package shell, the second electrode part is attached and fixed on the second end face of the soft package shell, the first electrode part and the second electrode part can be directly used as conductive electrodes of the soft package button cell, therefore, after the soft package button cell is assembled with an electronic product, the electrode lugs (the first electrode part and the second electrode part) of the soft package button cell can be in contact connection with a main board of the electronic product through the electrode parts (the first electrode part and the second electrode part), the convenience of the electronic product and the soft package button cell in the assembling process is improved, and compared with the existing mode that the electrode lugs are welded on the electronic product in a welding mode, the adverse effects of high temperature on the appearance and the performance of the soft package button cell during welding can be avoided, the appearance and the performance of the soft package button cell are improved, and meanwhile, the production process (the welding process is reduced), the production efficiency is improved.

Drawings

Fig. 1 is a schematic structural diagram of a soft-packaged button battery according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a soft-packaged button battery provided in an embodiment of the present invention;

fig. 3 is an explosion diagram of the soft-packaged button battery provided by an embodiment of the present invention.

The reference numerals in the specification are as follows:

1. a pole piece;

2. a soft package housing; 21. an upper shell; 22. a lower case;

3. a first tab; 31. a first electrode section;

4. a second tab; 41. a second electrode section;

51. a first support plate; 52. a second support plate; 53. and (4) a support column.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "upper", "lower", and the like, are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

As shown in fig. 1-3, the soft-package button battery provided by the embodiment of the present invention includes a pole core 1 and a soft-package casing 2; the pole core 1 is packaged in a soft package shell 2; the pole core 1 leads out a first pole lug 3 and a second pole lug 4 with opposite polarities; the first tab 3 penetrates out of the soft package shell 2 from a first leading-out position of the soft package shell 2, and the second tab 4 penetrates out of the soft package shell 2 from a second leading-out position of the soft package shell 2;

the outer end of the first tab 3 is provided with a first electrode part 31 matched with the shape of the first end face of the soft package shell 2, and the first electrode part 31 is fixedly attached to the first end face of the soft package shell 2;

the outer end of the second lug 4 is provided with a second electrode part 41 matched with the shape of the second end face of the soft package shell 2, and the second electrode part 41 is fixedly attached to the second end face of the soft package shell 2. The first end face of the soft package housing 2 refers to one end face in the axial direction of the soft package housing 2, and the second end face of the soft package housing 2 refers to the other end face in the axial direction of the soft package housing 2. The soft package shell 2 can adopt an aluminum-plastic composite film.

In one embodiment, the pole core 1 is a winding core formed by winding a positive plate, a diaphragm and a negative plate; a positive lug is led out of the positive plate; and a negative lug is led out of the negative plate.

In one embodiment, as shown in fig. 3, the soft pack case 2 includes an upper case 21 and a lower case 22, and the upper case 21 and the lower case 22 are hermetically connected to enclose the pole piece 1 in a receiving cavity formed therebetween.

Compared with the prior art, the soft package button battery provided by the embodiment of the utility model has the advantages that the first electrode part 31 matched with the first end surface shape of the soft package shell 2 is arranged at the outer end of the first tab 3, and the first electrode part 31 is attached and fixed on the first end surface of the soft package shell 2; the outer end of the second electrode lug 4 is provided with a second electrode part 41 matched with the second end face of the soft package shell 2 in shape, the second electrode part 41 is attached and fixed on the second end face of the soft package shell 2, the first electrode part 31 and the second electrode part 41 can be directly used as conductive electrodes of the soft package button cell, therefore, after the soft package button cell is assembled with an electronic product, the electrode lugs (the first electrode lug 3 and the second electrode part 4) of the soft package button cell can be in contact connection with a main board of the electronic product through the electrode parts (the first electrode part 31 and the second electrode part 41), the convenience of the electronic product and the soft package button cell in the assembling process is improved, compared with the mode that the conventional electrode lugs are welded on the electronic product in a welding mode, the adverse effect of high temperature on the appearance and the performance of the soft package button cell in the welding process can be avoided, and the appearance and the performance of the soft package button cell are improved, meanwhile, the production process (the welding process) is reduced, and the production efficiency is improved.

In one embodiment, the first electrode portion 31 entirely covers the first end surface of the soft package housing 2. Through covering the first terminal surface of soft packet of casing 2 with first electrode portion 31 for the conducting area of first electrode portion 31 is bigger, has optimized the contact connection between first electrode portion 31 and the electronic product mainboard, makes the electrically conductive effect better.

In one embodiment, the second electrode portion 41 completely covers the second end face of the soft package housing 2. The second electrode part 41 completely covers the second end face of the soft package shell 2, so that the conductive area of the second electrode part 41 is larger, the contact connection between the second electrode part 41 and the main board of the electronic product is optimized, and the conductive effect is better.

In one embodiment, the first electrode portion 31 is integrally formed with the first tab 3; the second electrode portion 41 is integrally formed with the second tab 4. The connection between the first electrode part 31 and the first tab 3 and the connection between the second electrode part 41 and the second tab 4 are optimized, and the overall conductive effect is improved.

In one embodiment, the first electrode portion 31 is adhered to the first end face of the soft package casing 2 by a first adhesive layer, and the second electrode portion 41 is adhered to the second end face of the soft package casing 2 by a second adhesive layer. Through adopting the mode that the glue film bonded, be convenient for fix the laminating of first electrode portion 31 on soft packet of casing 2's first terminal surface, fix the laminating of second electrode portion 41 on soft packet of casing 2's second terminal surface to can not destroy soft packet of casing 2.

In one embodiment, as shown in fig. 1-2, the first lead-out position and the second lead-out position are different from each other by 180 ° in circumference, the outer end of the first tab 3 is bent toward the first end face of the soft package housing 2, and the outer end of the second tab 4 is bent toward the second end face of the soft package housing 2. The difference between the first lead-out position and the second lead-out position on the circumference is 180 degrees, so that the first tab 3 and the second tab 4 can be led out conveniently, and the interference of the first tab 3 and the second tab 4 can be avoided.

In an embodiment, as shown in fig. 3, the softly wrapped button battery further includes an internal support structure built in the softly wrapped case 2, and a through hole (not shown) penetrating through two end faces of the pole core 1 is provided at the axial center of the pole core 1; the inner supporting structure comprises a first supporting plate 51, a second supporting plate 52 and supporting columns 53, wherein the first supporting plate 51 and the second supporting plate 52 are respectively located outside two end faces of the pole core 1, the supporting columns 53 penetrate through the through holes, and two ends of the supporting columns 53 are respectively fixedly connected with the first supporting plate 51 and the second supporting plate 52. Through-hole department at utmost point core 1 sets up inner supporting structure, when laminate polymer button cell's both ends face received the extrusion, this extrusion force acts on inner supporting structure through laminate polymer casing 2, inner supporting structure plays the guard action to utmost point core 1's both ends face, thereby avoid utmost point core 1's both ends face directly to receive the collision extrusion and make positive plate or negative pole piece damage fall the powder, prevent laminate polymer button cell's inside short circuit, the unable atress extruded problem of both ends face of having solved laminate polymer button cell, laminate polymer button cell's quality has been improved, avoided laminate polymer button cell receiving the extrusion and lead to laminate polymer button cell to produce the problem of warping with electronic product assembling process in laminate polymer button cell.

In one embodiment, as shown in fig. 3, the area supported by the internal support structure covers the first electrode portion 31 and the second electrode portion 41, which is beneficial for the contact connection between the first electrode portion 31 and the second electrode portion 41 and the motherboard of the electronic product.

In one embodiment, as shown in FIG. 2, the support column 53 is a hollow structure. The weight of the inner supporting structure can be reduced, so that the soft package button battery is not easy to deform due to extrusion and can be made more light and handy.

Preferably, the inner support structure is made of PP (polypropylene) material; the PP material has high strength and can bear certain extrusion force; the weight is light, and the overall weight of the soft package button battery can be reduced; the chemical resistance is good, and the corrosion of the electrolyte is avoided; the electrical insulation is good, and the short circuit is avoided inside the soft package button battery.

In one embodiment, the first support plate 51, the second support plate 52 and the support column 53 are of an integrally formed structure. The support columns 53 can be wound together with the pole pieces and the membrane when the winding core is prepared, and the inner support structure is also just fixed on the winding core when the pole pieces are wound on the winding core.

In one embodiment, the first support plate 51, the second support plate 52 and the support columns 53 are formed separately; the manufacturing difficulty is reduced, and the processing and the installation are convenient.

When manufacturing the soft package button battery, firstly winding the positive plate, the diaphragm and the negative plate to form a pole core 1; then respectively processing a first supporting plate 51, a second supporting plate 52 and a supporting column 53 by adopting a PP material; then inserting the support column 53 into the central hole of the pole core 1, and then fixedly connecting the first support plate 51 and the second support plate 52 with two ends of the support column 53 respectively; then adopt soft package casing 2 to encapsulate utmost point core 1 and interior bearing structure, buckle anodal ear and negative pole ear (first utmost point ear 3 and second utmost point ear 4) respectively to two terminal surfaces of soft package casing 2 and fix at last.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A soft package button battery is characterized by comprising a pole core and a soft package shell; the pole core is encapsulated in the soft package shell; the pole core is led out of a first pole lug and a second pole lug which are opposite in polarity; the first tab penetrates out of the soft package shell from a first leading-out position of the soft package shell, and the second tab penetrates out of the soft package shell from a second leading-out position of the soft package shell;

2. The soft-packaged button cell according to claim 1, wherein the first electrode portion completely covers the first end face.

3. The soft-packaged button cell according to claim 2, wherein the second electrode portion completely covers the second end face.

4. The soft-packaged button battery according to claim 1, wherein the first electrode portion is integrally formed with the first tab; the second electrode portion is integrally formed with the second electrode tab.

5. The soft-packaged button cell according to claim 1, wherein the first electrode portion is bonded to the first end face of the soft-packaged casing by a first adhesive layer, and the second electrode portion is bonded to the second end face of the soft-packaged casing by a second adhesive layer.

6. The soft-packaged button cell according to claim 1, wherein the first lead-out position and the second lead-out position are different from each other by 180 ° in circumference, the outer end of the first tab is bent toward the first end face of the soft package case, and the outer end of the second tab is bent toward the second end face of the soft package case.

7. The soft-package button battery according to claim 1, further comprising an internal support structure built in the soft package housing, wherein a through hole penetrating through two end faces of the pole core is formed at the axis of the pole core; the inner supporting structure comprises a first supporting plate, a second supporting plate and a supporting column, the first supporting plate and the second supporting plate are respectively located outside two end faces of the pole core, the supporting column penetrates through the through hole, and two ends of the supporting column are respectively fixedly connected with the first supporting plate and the second supporting plate.

8. The pouch button cell of claim 7, wherein the area supported by the internal support structure covers the first electrode portion and the second electrode portion.

9. The soft-packaged button cell according to claim 7, wherein the support posts are hollow structures.

10. The soft-packaged button cell according to claim 7, wherein the first support plate, the second support plate and the support column are integrally formed, or the first support plate, the second support plate and the support column are respectively formed.