CN211088318U

CN211088318U - Semimetal shell button cell

Info

Publication number: CN211088318U
Application number: CN201921668332.1U
Authority: CN
Inventors: 赖永彪
Original assignee: Chongqing Vdl Electronics Co ltd
Current assignee: Chongqing Zijian Electronic Co.,Ltd.
Priority date: 2019-10-08
Filing date: 2019-10-08
Publication date: 2020-07-24
Anticipated expiration: 2029-10-08

Abstract

The utility model discloses a half metal casing button cell, including naked electric core, positive shell and negative pole shell, naked electric core is soft-packaged button electricity core, positive shell is the plastic casing of disc type, and its periphery upwards extends the baffle of take the altitude, the inside intermediate position of positive shell is provided with the metal pad for weld naked electric core, the cylinder type metal casing that the negative pole shell seals for bottom opening, top, the baffle inboard of positive shell is arranged in at the top of negative pole shell, the planar diameter in top of positive shell slightly is less than the diameter of its bottom cross-section circle. The naked electric core of the battery is formed by packaging an aluminum plastic film, only bulges when the battery is abused by heat, and the explosion probability is zero; the positive and negative electrodes can be sealed by insulating sealant, the sealing performance of the battery is effectively ensured, the self-discharge is small, and the qualification rate is improved by 20-40%; the battery shell adopts the matching of the metal shell and the plastic shell, so that the production cost is reduced by 15-30%, and the consistency is better.

Description

Semimetal shell button cell

Technical Field

The utility model relates to a battery field, more specifically say so and relate to a half metal casing button cell.

Background

In the field of batteries, particularly small button lithium ion batteries, the external shell of the small button lithium ion battery is generally selected from ① full metal shells serving as the shells of the button batteries, ② an aluminum plastic film serving as the shells of the button batteries, the button batteries adopting the full metal shells are good in consistency but not effectively guaranteed in tightness, the batteries have potential safety hazards of explosion and are not good enough in safety, and the batteries are high in production cost.

Disclosure of Invention

Not enough to prior art, the utility model aims to provide a button cell of half metal casing, sealing performance is good, and the potential safety hazard of battery explosion significantly reduces, and the security performance is good, low in production cost.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a half metal casing button cell, includes naked electric core, positive pole shell and negative pole shell, naked electric core is soft-packaged button electricity core, positive pole shell is the plastic casing of disc type, and its periphery upwards extends the baffle of take the altitude, the inside intermediate position of positive pole shell is provided with the metal pad for weld naked electric core, the cylinder type metal casing that the negative pole shell was sealed for bottom opening, top, the baffle inboard of positive pole shell is arranged in at the top of negative pole shell, the planar diameter in top of positive pole shell slightly is less than the diameter of its bottom cross-section circle.

Preferably, naked electric core includes anodal utmost point ear, negative pole utmost point ear and plastic-aluminum membrane, anodal utmost point ear sets up the both sides at the plastic-aluminum membrane with negative pole utmost point ear symmetry, the plastic-aluminum membrane includes plastic-aluminum membrane and lower plastic-aluminum membrane, is provided with the plastic-aluminum membrane lace between the upper and lower plastic-aluminum membrane, naked electric core is formed through coiling or lamination, annotating with the plastic-aluminum membrane encapsulation behind the liquid process by positive, negative pole piece.

Preferably, the positive and negative electrode tabs of the naked battery cell are at a certain angle, and the angle is 0-180 degrees.

Preferably, the positive electrode shell is made of general plastic, engineering plastic or other plastics, the general plastic is one of polyolefin, polyvinyl chloride and polystyrene, and the engineering plastic is one of polyamide, polycarbonate and ABS resin.

Preferably, the negative electrode casing is a stainless steel metal, aluminum casing or other metal casing.

Preferably, the size of the positive electrode shell is 0.2-8 mm larger than that of the negative electrode shell.

Preferably, the metal pad on the positive electrode shell is used for welding a positive electrode tab group of the naked electric core.

Preferably, after the bare cell positive and negative electrode tab groups are welded with the positive and negative electrode shells, the positive and negative electrode shells are sealed by insulating sealant.

Compared with the prior art, the beneficial effects of the utility model are that: the naked electric core of the battery is formed by packaging an aluminum plastic film, only bulges when the battery is abused by heat, and the explosion probability is zero; the positive and negative electrodes can be sealed by insulating sealant, the sealing performance of the battery is effectively ensured, the self-discharge is small, and the qualification rate is improved by 20-40%; the battery shell adopts the matching of the metal shell and the plastic shell, so that the production cost is reduced by 15-30%, and the consistency is better.

Drawings

FIG. 1 is a view of the split structure of the electrode shell of the present invention;

fig. 2 is the structure diagram of the bare cell of the present invention.

In the figure: 1-negative pole shell, 2-positive pole shell, 3-metal bonding pad, 4-naked electric core, 4.1-positive pole tab, 4.2-upper aluminum-plastic film, 4.3-aluminum-plastic film lace, 4.4-lower aluminum-plastic film and 4.5-negative pole tab.

Detailed Description

For better understanding of the technical solution of the present invention, the following detailed description is made with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 and 2, an embodiment of the present invention: the utility model provides a half metal casing button cell, includes naked electric core 4, positive pole shell 2 and negative pole shell 1, naked electric core 4 is soft-packaged button electricity core, positive pole shell 2 is the plastic casing of disc type, and its periphery upwards extends the baffle of take the altitude, the inside intermediate position of positive pole shell 2 is provided with metal bonding pad 3 for weld naked electric core 4, negative pole shell 1 is the cylinder type metal casing that bottom opening, top were sealed, the baffle of positive pole shell 2 is inboard is arranged in at the top of negative pole shell 1, the planar diameter in top of positive pole shell 2 slightly is less than the diameter of its bottom cross-section circle.

Specifically, naked electric core 4 includes anodal utmost point ear 4.1, negative pole utmost point ear 4.5 and plastic-aluminum membrane, anodal utmost point ear 4.1 sets up the both sides at the plastic-aluminum membrane with negative pole utmost point ear 4.5 symmetry, the plastic-aluminum membrane includes plastic-aluminum membrane 4.2 and lower plastic-aluminum membrane 4.4, is provided with plastic-aluminum membrane lace 4.3 between the upper and lower plastic-aluminum membrane, naked electric core 4 is formed by positive, negative pole piece through coiling or lamination, annotate the encapsulation of plastic-aluminum membrane after the liquid process with the plastic-aluminum membrane. The positive and negative pole utmost point ear of naked electric core 4 is certain angle, and its angle is 0 ~ 180.

The positive electrode shell 2 is made of general plastic, engineering plastic or other plastics, the general plastic is one of polyolefin, polyvinyl chloride and polystyrene, and the engineering plastic is one of polyamide, polycarbonate and ABS resin.

The cathode shell 1 is made of stainless steel metal, an aluminum shell or other metal shells.

The size of the positive electrode shell 2 is 0.2-8 mm larger than that of the negative electrode shell 1.

And the metal bonding pad 3 on the positive shell 2 is used for welding a positive pole lug group of the naked electric core 4.

And after the positive and negative electrode lug groups of the bare cell 4 are welded with the positive and negative electrode shells, the positive and negative electrode shells are sealed by insulating sealant.

The specific manufacturing process of the battery comprises the following steps: at first, make naked electric core 4 through soft-packaged button cell technology, then weld the negative pole utmost point ear crowd of naked electric core 4 and the negative pole shell 1 of metal mutually to pack into metal negative pole shell 1 with naked electric core 4, wait that naked electric core 4 goes into to weld positive pole utmost point ear crowd and the metal pad 3 on the positive shell 2 of plastics mutually after the shell again, seal metal negative pole shell 1 bottom and the positive shell 2 bottoms of plastics through insulating sealed glue at last, form the button cell of sealed complete semimetal casing. The battery may be a secondary battery, particularly a lithium ion battery, or may be a primary battery.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a semimetal casing button cell, includes naked electric core (4), positive pole shell (2) and negative pole shell (1), its characterized in that: naked electric core (4) are soft-packaged button electricity core, positive pole shell (2) are the plastic casing of disc type, and its periphery upwards extends out take the altitude baffle, the inside intermediate position of positive pole shell (2) is provided with metal bonding pad (3) for welding naked electric core (4), negative pole shell (1) is the cylinder type metal casing that bottom opening, top were sealed, the baffle inboard of positive pole shell (2) is arranged in at the top of negative pole shell (1), the planar diameter in top of positive pole shell (2) slightly is less than the diameter of its bottom cross-section circle.

2. A semi-metal casing button cell as in claim 1, wherein: naked electric core (4) include anodal utmost point ear (4.1), negative pole utmost point ear (4.5) and plastic-aluminum membrane, anodal utmost point ear (4.1) and negative pole utmost point ear (4.5) symmetry set up the both sides at the plastic-aluminum membrane, the plastic-aluminum membrane includes plastic-aluminum membrane (4.2) and lower plastic-aluminum membrane (4.4), is provided with the plastic-aluminum membrane lace between the upper and lower plastic-aluminum membrane, naked electric core (4) are formed through coiling or lamination, annotating with the plastic-aluminum membrane encapsulation behind the liquid process by positive, negative pole piece.

3. A semi-metal casing button cell as in claim 2, wherein: the positive and negative electrode lugs of the naked battery cell (4) are at a certain angle, and the angle is 0-180 degrees.

4. A semi-metal casing button cell as in claim 3, wherein: the positive electrode shell (2) is made of general plastic or engineering plastic.

5. A semi-metal casing button cell as in claim 4, wherein: the general plastic is one of polyolefin, polyvinyl chloride and polystyrene, and the engineering plastic is one of polyamide, polycarbonate and ABS resin.

6. A semi-metal casing button cell as in claim 5, wherein: the negative electrode shell (1) is a metal shell.

7. A semi-metal casing button cell as in claim 6, wherein: the size of the positive electrode shell (2) is 0.2-8 mm larger than that of the negative electrode shell (1).

8. A semi-metal casing button cell as in claim 7, wherein: and the metal bonding pad (3) on the positive shell (2) is used for welding a positive pole lug group of the naked electric core (4).

9. A semi-metal casing button cell according to any of claims 1-8, wherein: after the positive and negative electrode tab groups of the bare cell (4) are welded with the positive and negative electrode shells, the positive and negative electrode shells are sealed by insulating sealant.