CN213124684U

CN213124684U - Soft package button cell

Info

Publication number: CN213124684U
Application number: CN202022034348.6U
Authority: CN
Inventors: 韩子勤; 刘盛发; 周志勇; 席鹏飞; 雷激
Original assignee: Springpower Technology Shenzhen Co Ltd
Current assignee: Springpower Technology Shenzhen Co Ltd
Priority date: 2020-09-16
Filing date: 2020-09-16
Publication date: 2021-05-04
Anticipated expiration: 2030-09-16

Abstract

The utility model relates to a soft package button battery, which comprises a soft package shell and a pole core, wherein the pole core is packaged in the soft package shell, a first pole lug and a second pole lug with different polarities are led out from the pole core, and the first pole lug and the second pole lug penetrate out of the soft package shell; first utmost point ear is including being located the first interior section of soft packet of shell and exposing the first outer section of linking outside the soft packet of shell, and the width everywhere of first interior section is even, and the width everywhere of first exterior section is even, and the width of first exterior section of linking is less than the width of first interior section. Compared with the prior art, the width of the first outer connecting section of the first tab is smaller than that of the first inner connecting section, the width of the joint of the first tab and the electronic equipment is reduced, the first outer connecting section can be welded to a smaller bonding pad, the occupied area of the bonding pad on the protection plate is reduced, the welding difficulty of the first tab and the electronic equipment is reduced, the production and assembly of soft package button batteries are facilitated, and the flexible packaging button battery is suitable for mass production.

Description

Soft package button cell

Technical Field

The utility model belongs to the technical field of laminate polymer battery, especially, relate to a laminate polymer 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 button battery mainly has the following advantages:

(1) the safety is good, and laminate polymer button cell 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 button battery is light in weight and high in energy density, and the weight of the soft-package button battery is 40% lighter than that of a steel-shell battery with the same capacity and 20% lighter than that of an aluminum-shell battery, so that the soft-package button battery generally has high energy density.

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

The soft-package button battery is a form of the soft-package battery and is characterized by small volume, thin thickness and high energy density, so that the soft-package button battery is widely applied to various electric appliance products. The existing soft package button battery comprises a pole core and a soft package shell, wherein a positive pole lug and a negative pole lug are led out from the pole core. When the soft-package button battery is applied to the electronic equipment, the positive electrode lug and the negative electrode lug are welded on a bonding pad of a protection plate of the electronic equipment, so that the soft-package battery is electrically connected with the electronic equipment. Because the size of the current tab is large (the thickness is 0.1mm, and the width is 2mm), the requirement on a welding disc is high, the occupied area of the welding disc on the protection plate is large, and the welding difficulty of the tab is high.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the soft-packaged button battery is provided for solving the problem that the existing tab is difficult to weld in electronic equipment.

In order to solve the technical problem, an embodiment of the present invention provides a soft-packaged button battery, which includes a soft-packaged casing and a pole core, wherein the pole core is packaged in the soft-packaged casing, the pole core is led out a first pole lug and a second pole lug with different polarities, and the first pole lug and the second pole lug penetrate out of the soft-packaged casing;

the first tab comprises a first inner connecting section positioned in the soft package shell and a first outer connecting section exposed out of the soft package shell, the width of each part of the first inner connecting section is uniform, the width of each part of the first outer connecting section is uniform, and the width of the first outer connecting section is smaller than that of the first inner connecting section.

Optionally, a value range of a difference between the width of the first external connecting section and the width of the first internal connecting section is 1-1.2 mm.

Optionally, the thickness of the first outer connecting section is smaller than the thickness of the first inner connecting section.

Optionally, a difference between the thickness of the first outer connecting section and the thickness of the first inner connecting section is in a range of 0.02 ± 0.005 mm.

Optionally, the second tab comprises a second inner connecting section located inside the soft package shell and a second outer connecting section exposed outside the soft package shell, and the width of the second outer connecting section is smaller than that of the second inner connecting section.

Optionally, a value range of a difference between the width of the second external connecting section and the width of the second internal connecting section is 1-1.2 mm.

Optionally, the thickness of the second inner connecting section is smaller than the thickness of the second outer connecting section.

Optionally, a difference between the thickness of the second outer connecting section and the thickness of the second inner connecting section is in a range of 0.02 ± 0.005 mm.

Optionally, soft packet of casing is including the parcel the shell of utmost point core is with sealed the banding of shell, the banding is followed the axial of utmost point core is bent and is laminated on the periphery wall of shell, the peripheral wall of banding is gone up to paste and is had the insulating layer.

Optionally, the lead-out position of the first tab and the lead-out position of the second tab are circumferentially different by 180 °.

The embodiment of the utility model provides a soft-packaged button cell, compared with the prior art, the width of the first outer section of linking of first utmost point ear is less than the width of first in-connection section, the width with the electronic equipment junction of first utmost point ear has been reduced, make first outer section of linking can weld on littleer pad, reduce the area occupied of pad on the protective plate, reduce the welding degree of difficulty of first utmost point ear and electronic equipment, be favorable to soft-packaged button cell's production assembly, soft-packaged button cell also can use in the electronic equipment of smaller size, soft-packaged button cell's application scope has been enlarged, be suitable for mass production.

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 schematic view of a part of a soft-packaged button battery according to an embodiment of the present invention;

fig. 3 is a structural schematic diagram of the first tab in fig. 2.

The reference numerals in the specification are as follows:

1. a soft package housing; 11. a housing; 12. sealing edges;

2. a first tab; 21. a first inner connecting section; 22. a first external connecting section;

3. a second tab; 4. an insulating layer; 5. and gluing a first tab.

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.

As shown in fig. 1 to fig. 3, the embodiment of the present invention provides a soft-packaged button battery, which includes a soft-packaged casing 1 and a pole core, wherein the pole core is packaged in the soft-packaged casing 1, a first pole lug 2 and a second pole lug 3 with different polarities are led out from the pole core, and the first pole lug 2 and the second pole lug 3 penetrate out of the soft-packaged casing 1;

first utmost point ear 2 is including being located the first interior section 21 of soft packet of casing 1 and exposing the first outer section 22 of linking outside soft packet of casing 1, and first interior section 21 width everywhere is even, and first outer section 22 width everywhere is even, and the width of first outer section 22 of linking is less than the width of first interior section 21.

The embodiment of the utility model provides a soft-packaged button cell, compared with the prior art, the width of first outer linkage section 22 of first utmost point ear 2 is less than the width of first in-connection section 21, the width with the electronic equipment junction of first utmost point ear 2 has been reduced, make first outer linkage section 22 can weld on littleer pad, reduce the area occupied of pad on the protective plate, reduce the welding degree of difficulty of first utmost point ear 2 and electronic equipment, be favorable to soft-packaged button cell's production assembly, soft-packaged button cell also can use in the electronic equipment of smaller size, soft-packaged button cell's application scope has been enlarged, be suitable for mass production.

In one embodiment, the difference between the width of the first external connecting section 22 and the width of the first internal connecting section 21 ranges from 1mm to 1.2 mm. The size of the first in-connection section 21 of the first tab 2 is the size of the existing tab, and the width of the first in-connection section 21 is 2mm, so that the width of the first outer-connection section 22 is not less than 0.8mm and not more than 1mm, and the width of the first outer-connection section 22 is less than the width of the existing tab, so that the first outer-connection section 22 can be welded to a smaller pad, the welding difficulty of the first tab 2 and electronic equipment is reduced, the structure is simple, and mass production is easy.

In one embodiment, the thickness of the first external connecting section 22 is smaller than the thickness of the first internal connecting section 21. Reduce the thickness of first utmost point ear 2 with the electronic equipment junction, the welding of first utmost point ear 2 and pad of being convenient for reduces the welding degree of difficulty of first utmost point ear 2 and electronic equipment, can produce lighter thinner soft packet of button cell, is favorable to soft packet of button cell's production assembly, is suitable for mass production.

In one embodiment, the difference between the thickness of the first external connecting section 22 and the thickness of the first internal connecting section 21 is in the range of 0.02 ± 0.005 mm. The size of the first in-connection section 21 of the first tab 2 is the size of the existing tab, and the thickness of the first in-connection section 21 is 0.1mm, so that the thickness of the first out-connection section 22 is 0.08 +/-0.005 mm, the first out-connection section 22 can be welded on a smaller bonding pad, the welding difficulty of the first tab 2 and electronic equipment is reduced, the structure is simple, and mass production is easy.

In one embodiment, the first tab 2 is integrally formed. The overall strength of the first tab 2 is increased, and the first inner connecting section 21 and the first outer connecting section 22 are prevented from being easily broken at the joint.

In one embodiment, as shown in fig. 1, the second tab 3 includes a second inner connecting section located inside the soft package housing 1 and a second outer connecting section exposed outside the soft package housing 1, and the width of the second outer connecting section is smaller than that of the second inner connecting section. The width of the second outer continuous section of the second tab 3 is less than the width of the second inner continuous section, the width of the second tab 3 and the width of the joint of the electronic equipment are reduced, the second outer continuous section can be welded to a smaller welding pad, the occupied area of the welding pad on the protection plate is reduced, the welding difficulty of the second tab 3 and the electronic equipment is reduced, the production and assembly of the soft-package button battery are facilitated, the soft-package button battery can also be applied to the electronic equipment with smaller size, the application range of the soft-package button battery is expanded, and the soft-package button battery is suitable for mass production.

In one embodiment, the difference between the width of the second external connecting section and the width of the second internal connecting section ranges from 1mm to 1.2 mm. The size of the second in-connection section of the second tab 3 is the size of the existing tab, and the width of the second in-connection section is 2mm, so that the width of the second in-connection section is not less than 0.8mm and not more than 1mm, and the width of the second in-connection section is less than the width of the existing tab, so that the second in-connection section can be welded on a smaller pad, the welding difficulty of the second tab 3 and electronic equipment is reduced, the structure is simple, and mass production is easy.

In one embodiment, the thickness of the second inner connecting section is smaller than the thickness of the second outer connecting section. The thickness of the second lug 3 and the electronic equipment junction is reduced, the welding of the second lug 3 and the bonding pad is facilitated, the welding difficulty of the second lug 3 and the electronic equipment is reduced, a lighter and thinner soft-package button battery can be produced, the production and assembly of the soft-package button battery are facilitated, and the production and assembly of the soft-package button battery are suitable for mass production.

In one embodiment, the difference between the thickness of the second outer connecting section and the thickness of the second inner connecting section is in a range of 0.02 ± 0.005 mm. The size of the second in-connection section of the second lug 3 is the size of the existing lug, the thickness of the second in-connection section is 0.1mm, therefore, the thickness of the second out-connection section is 0.08 +/-0.005 mm, the second out-connection section can be welded on a smaller welding pad, the welding difficulty of the second lug 3 and electronic equipment is reduced, the structure is simple, and mass production is easy.

In one embodiment, the second pole ear 3 is integrally formed. The integral strength of the second tab 3 is increased, and the connection part of the second inner connecting section and the second outer connecting section is prevented from being easily broken.

In one embodiment, as shown in fig. 1, the soft package shell 1 includes a shell 11 for wrapping the pole core and a sealing edge 12 for sealing the shell 11, the sealing edge 12 is bent along the axial direction of the pole core and is attached to the outer peripheral wall of the shell 11, and the insulating layer 4 is attached to the outer peripheral wall of the sealing edge 12. The insulating layer 4 plays an insulating protection role for the sealing edge 12, prevents the sealing edge 12 from being scratched and punctured, and avoids short circuit of the soft-package button battery.

In one embodiment, the insulating layer 4 is an insulating adhesive paper.

In one embodiment, the soft package case 1 is an aluminum-plastic composite film case.

In one embodiment, as shown in FIG. 2, the seal 12 is serrated.

In one embodiment, as shown in fig. 3, the portion of the first inner connecting section 21 at the sealed edge 12 is wrapped with the first tab glue 5. Set up first utmost point ear and glue 5 soft packet of casing 1 of being convenient for and encapsulate with first utmost point ear 2 for first utmost point ear 2 can not with soft packet of casing 1 direct contact, prevent that first utmost point ear 2 from taking place reaction with soft packet of casing 1 and corroding soft packet of casing 1.

In one embodiment, the portion of the second inner link section at the edge seal 12 is coated with a second tab glue (not shown). Set up second utmost point ear and glue soft packet of casing 1 of being convenient for and encapsulate with second utmost point ear 3 for second utmost point ear 3 can not with soft packet of casing 1 direct contact, prevent that second utmost point ear 3 from reacting with soft packet of casing 1 and corroding soft packet of casing 1.

In one embodiment, the lead-out position of the first tab 2 and the lead-out position of the second tab 3 are different from each other by an angle of 0-180 ° on the circumference. The first tab 2 and the second tab 3 can be led out from different positions.

Preferably, as shown in fig. 1, the lead-out position of the first tab 2 and the lead-out position of the second tab 3 are circumferentially different by 180 °. The distance between the first lug 2 and the second lug 3 is increased, so that the first lug 2 and the second lug 3 can be led out conveniently, and the interference between the first lug 2 and the second lug 3 is avoided.

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. The soft package button battery is characterized by comprising a soft package shell and a pole core, wherein the pole core is packaged in the soft package shell, a first pole lug and a second pole lug with different polarities are led out of the pole core, and the first pole lug and the second pole lug penetrate out of the soft package shell;

2. The soft-package button battery according to claim 1, wherein the difference between the width of the first outer connecting section and the width of the first inner connecting section ranges from 1mm to 1.2 mm.

3. The pouch button cell according to claim 1, wherein the thickness of the first outer connecting section is less than the thickness of the first inner connecting section.

4. The soft-packaged button cell according to claim 3, wherein the difference between the thickness of the first outer connecting section and the thickness of the first inner connecting section is in the range of 0.02 ± 0.005 mm.

5. The pouch button cell of claim 1, wherein the second tab comprises a second inner connecting section inside the pouch casing and a second outer connecting section exposed outside the pouch casing, the second outer connecting section having a width less than a width of the second inner connecting section.

6. The soft-packaged button cell according to claim 5, wherein the difference between the width of the second outer connecting section and the width of the second inner connecting section ranges from 1mm to 1.2 mm.

7. The pouch button cell of claim 5, wherein the thickness of the second outer connecting section is less than the thickness of the second inner connecting section.

8. The soft-packaged button cell according to claim 7, wherein the difference between the thickness of the second outer connecting section and the thickness of the second inner connecting section is in the range of 0.02 ± 0.005 mm.

9. The soft-package button battery according to claim 1, wherein the soft-package shell comprises a shell wrapping the pole core and a sealing edge sealing the shell, the sealing edge is bent along the axial direction of the pole core and attached to the outer peripheral wall of the shell, and an insulating layer is attached to the outer peripheral wall of the sealing edge.

10. The soft-packaged button cell according to claim 1, wherein the lead-out position of the first tab and the lead-out position of the second tab are circumferentially different by 180 °.