CN210379234U

CN210379234U - Button cell without welding tab

Info

Publication number: CN210379234U
Application number: CN201920934139.1U
Authority: CN
Inventors: 邢庆岭; 杨侠
Original assignee: Dongguan Golden Energy Battery Co ltd
Current assignee: Dongguan Golden Energy Battery Co ltd
Priority date: 2019-06-20
Filing date: 2019-06-20
Publication date: 2020-04-21
Anticipated expiration: 2029-06-20

Abstract

The utility model discloses a button cell without welding electrode lugs, which comprises an electric core, an anode lug, a cathode lug, an upper cover and a lower shell; the battery cell comprises a positive plate, a negative plate and a diaphragm, wherein the positive plate is connected with a positive tab, and the negative plate is connected with a negative tab; the upper cover and the lower shell form a cavity for placing the battery cell; the button cell also comprises a rubber plug or a rubber pad, wherein the rubber plug is positioned in the middle of the cell or the rubber pad is positioned at the upper end and the lower end in the middle of the cell, so that the positive tab is tightly attached to the lower shell, and the negative tab is tightly attached to the upper cover. The utility model has the advantages that: the rubber plug in the middle of the battery cell or the rubber pads at the upper end and the lower end can extrude the positive and negative electrode lugs to enable the lugs to be tightly attached to the upper cover and the lower shell, and convenience is provided for subsequent external welding; and a multi-lug structure is adopted to realize the quick charging function of the battery core.

Description

Button cell without welding tab

Technical Field

The utility model relates to a battery technology field, especially a button cell who need not weld utmost point ear.

Background

Button cells are small cells, and are generally used in various small electronic products, such as electronic watches, electronic hearing aids, earphones, and the like. Button batteries are classified into metal type cases and soft package type cases according to the case materials. The button battery with the metal shell adopts an upper cover and a lower shell made of steel shell materials to form a battery cell cavity for placing a battery cell. The traditional assembling mode is that after being connected, the battery cell enters the upper cover through the positive and negative electrode lugs, the negative electrode lug is attached to the upper cover surface, the welding needle penetrates through the center of the battery cell, the negative electrode lug and the upper cover are welded inside, the positive electrode lug is welded with the lower shell, then the upper cover and the lower shell are combined and pressed, and the upper cover and the lower shell are insulated through the sealing ring. Such an assembly method requires welding of the positive and negative electrode tabs from the inside, and is cumbersome in assembly. The utility model discloses a solve and need the internal weld's problem, provide a button cell who need not weld utmost point ear, let just, the negative pole ear is more convenient for operate when realizing being connected with upper cover, inferior valve.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is not enough to above-mentioned prior art, provide a button cell who need not weld utmost point ear.

In order to solve the above technical problem, the utility model discloses a first technical scheme who takes is: a button battery without welding tabs comprises a battery core, a positive tab, a negative tab, an upper cover, a lower shell and a rubber plug; the battery cell comprises a positive plate, a negative plate and a diaphragm, wherein the positive plate is connected with a positive tab, and the negative plate is connected with a negative tab; the upper cover and the lower shell form a cavity for placing the battery cell, and the battery cell is placed in the cavity; the rubber plug is positioned in the middle of the battery cell, the elasticity of the rubber plug enables the positive electrode tab to be tightly attached to the lower shell, and the negative electrode tab is tightly attached to the upper cover.

The utility model discloses the second technical scheme who takes is: a button battery without welding tabs comprises a battery core, a positive tab, a negative tab, an upper cover, a lower shell and a rubber gasket; the battery cell comprises a positive plate, a negative plate and a diaphragm, wherein the positive plate is connected with a positive tab, and the negative plate is connected with a negative tab; the upper cover and the lower shell form a cavity for placing the battery cell, and the battery cell is placed in the cavity; the rubber pad comprises an upper rubber pad and a lower rubber pad, the upper rubber pad is positioned at the upper end of the battery cell, the upper rubber pad presses the negative electrode lug, and the elasticity of the upper rubber pad enables the negative electrode lug to be tightly attached to the upper cover; the lower rubber mat is positioned at the lower end of the battery core, the positive lug is pressed by the lower rubber mat, and the elasticity of the lower rubber mat enables the positive lug to be tightly attached to the lower shell.

In the technical scheme, the positive tab is welded with the lower shell or/and the negative tab is welded with the upper cover.

In the technical scheme, the positive tab and the lower shell as well as the negative tab and the upper cover are externally welded.

In the first technical scheme, the rubber plug is made of ethylene propylene diene monomer or polypropylene.

In the first technical scheme, the rubber plug is of a splicing structure, two ends of the rubber plug are made of ethylene propylene diene monomer or polypropylene materials, and the middle of the rubber plug is connected by a spring, stainless steel or polypropylene materials.

In the second technical scheme, the rubber pad is made of ethylene propylene diene monomer or polypropylene.

In the second technical scheme, the upper rubber pad or/and the lower rubber pad are/is provided with small holes, the positive electrode lug is tightly attached to the lower shell through the small hole of the lower rubber pad, and the negative electrode lug is tightly attached to the upper cover through the small hole of the upper rubber pad.

In the technical scheme, the positive electrode tab or the negative electrode tab is of a tab folding structure, and the tail end of the positive electrode sheet or the negative electrode sheet is not coated and folded to form a tab folding structure.

In the above technical scheme, the positive electrode tab or the negative electrode tab is of a multi-tab structure, and the number of the positive electrode tabs or the negative electrode tabs is more than 1.

The utility model has the advantages that: the rubber plug in the middle of the battery cell or the rubber pads at the upper end and the lower end can extrude the positive and negative electrode lugs to enable the lugs to be tightly attached to the upper cover and the lower shell, and convenience is provided for subsequent external welding; and a multi-lug structure is adopted to realize the quick charging function of the battery core.

Drawings

Fig. 1 is a schematic structural diagram of a button cell in the prior art.

Fig. 2 is a schematic structural diagram of a first embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a second embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a third embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a fourth embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a fifth embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a first positive tab and a first negative tab of the present invention.

Fig. 8 is a schematic structural diagram of a second type of positive electrode tab and negative electrode tab according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, a button battery with a metal casing in the prior art includes a battery cell 101, a positive tab 102, a negative tab 103, an upper cover 104, and a lower casing 105, where the battery cell 101 is formed by winding a positive tab, a negative tab, and a diaphragm, the positive tab is connected to the positive tab 102, and the negative tab is connected to the negative tab 103. The battery core 101 is placed in a cavity formed by the upper cover 104 and the lower cover 105, and the upper cover 104 and the lower cover 105 are insulated and separated by the sealing ring 106. In a traditional assembly mode, a battery cell 101 is connected with a positive tab 102 and a negative tab 103 and then enters an upper cover 104, the negative tab 103 is attached to the surface of the upper cover 104, then a welding pin penetrates through the center of the battery cell 101 to weld the negative tab 103 and the upper cover 104 inside, the positive tab 102 is welded with a lower cover 105 before the shell is closed, and finally the upper cover 104 and the lower cover 105 are combined and pressed tightly.

In order to avoid the loaded down with trivial details process of internal weld, the utility model provides a neotype button cell technical scheme adopts plug or cushion, and the plug is located the centre of electric core or the cushion is located the centre of electric core and goes up the lower extreme, makes anodal ear and inferior valve closely laminate, and the negative pole ear closely laminates with the upper cover. In each embodiment, the positive electrode and the negative electrode may be interchanged.

Example one

As shown in fig. 2, a basic structure of a button battery without welding tabs includes components of an existing button battery, including a battery cell 201, a positive tab 202, a negative tab 203, an upper cover 204, and a lower shell 205, where the upper cover 204 and the lower shell 205 are insulated and separated by a sealing ring 206. The novel button cell is additionally provided with a rubber plug 207 on the basis of the original button cell. The rubber plug 207 is located in the middle of the battery cell 201, the upper end of the rubber plug 207 pushes the negative tab 203 against the surface of the upper cover 204, so that the negative tab 203 is tightly attached to the upper cover 204, and the lower end of the rubber plug 207 pushes the positive tab 202 against the surface of the lower shell 205, so that the positive tab 202 is tightly attached to the lower shell 205. The rubber plug 207 is made of an insulating, corrosion-resistant and elastic material, preferably ethylene propylene diene monomer or polypropylene, but not limited thereto. Under the action of the rubber plug 207, the contact between the positive and negative lugs and the shell can meet the normal use of the button cell.

Example two

As shown in fig. 3, the basic structure of the second embodiment includes the components of the existing button battery, including a battery cell 301, a positive tab 302, a negative tab 303, an upper cover 304, and a lower shell 305, and the upper cover 304 and the lower shell 305 are insulated and separated by a sealing ring 306. The second embodiment is an improvement on the first embodiment. The improved technical point is that the button cell adopts a multi-tab structure, and the number of the positive tabs 302 or the negative tabs 303 is more than 1. In fig. 3, 2

positive electrode tabs

302 and 2 negative electrode tabs 303 are provided, and positive electrode tabs 302 are bonded to each other, and negative electrode tabs 203 are similarly bonded to each other.

In order to ensure stable contact, external welding can be performed on the outer portion of the assembled button cell just opposite to the upper end or the lower end of the rubber plug 307, and the rubber plug 307 can well support the positive tab 302, the lower shell 305, the negative tab 303 and the upper cover 304, so that favorable conditions are provided for external welding. Among them, the external welding is preferably laser welding.

EXAMPLE III

As shown in fig. 4, the basic structure of the third embodiment includes the components of the existing button battery, including a battery core 401, a positive tab 402, a negative tab 403, an upper cover 404, and a lower shell 405, and the upper cover 404 and the lower shell 405 are insulated and separated by a sealing ring 406. The third embodiment is an improvement on the second embodiment, and the improvement technical point is that the rubber plug 407 is a splicing structure, and both ends of the rubber plug 407 are made of materials with insulation, corrosion resistance and certain elasticity, preferably ethylene propylene diene monomer or polypropylene, but not limited thereto; the middle portion of the rubber plug 407 is made of a spring, stainless steel or polypropylene to connect the two ends of the rubber plug 407, so as to meet different strength and elasticity requirements.

Example four

As shown in fig. 5, a basic structure of a button battery without welding tabs includes a battery core 501, a positive tab 502, a negative tab 503, an upper cover 504 and a lower cover 505, and the connection structural relationship is consistent with that of a button battery in the prior art. On this basis, novel button cell has increased cushion 507. The rubber pad 507 includes an upper rubber pad 5071 and a lower rubber pad 5072. The upper rubber pad 5071 is positioned at the upper end of the battery cell 501, the negative plate 503 is wound on the surface of the upper rubber pad 5071 and is tightly attached to the upper cover 504 under the action of the upper rubber pad 5071; similarly, the lower rubber pad 5072 is positioned at the lower end of the battery cell 501, and the positive plate 502 is wound on the surface of the lower rubber pad 5072 and is tightly attached to the lower casing 505. Wherein, the rubber pad 507 is made of insulating, corrosion-resistant and elastic material, preferably ethylene propylene diene monomer or polypropylene, but not limited thereto. In order to ensure stable contact, external welding is performed at a position where the upper rubber 5071 is attached to the upper cover 504 and at a position where the lower rubber 5072 is attached to the lower cover 505, and the external welding is preferably performed by laser welding. In this embodiment, the button battery adopts a multi-tab structure, and the number of the positive tabs or the negative tabs is more than 1. In fig. 5, 2

positive electrode tabs

502 and 2 negative electrode tabs 503 are provided, and positive electrode tabs 502 are bonded to each other, and negative electrode tabs 503 are similarly bonded to each other. External welding may be performed between positive tabs 502 or between negative tabs 503 to improve contact.

EXAMPLE five

As shown in fig. 6, the basic structure of the fourth embodiment includes the components of the existing button cell, including a cell 601, a positive tab 602, a negative tab 603, an upper cover 604 and a lower shell 605, and the upper cover 604 and the lower shell 605 are insulated and separated by a sealing ring 606. Example five improves on the technique of example four. The improvement is that the rubber pad 607 comprises an upper rubber pad 6071 and a lower rubber pad 6072. The rubber pad 607 is made of an insulating, corrosion-resistant and elastic material, preferably, but not limited to, epdm or polypropylene. The upper rubber mat 6071 and the lower rubber mat 6072 are respectively provided with a small hole 6073, and the positive tab 602 is tightly attached to the lower casing 605 through the small hole 6073 of the lower rubber mat 6072 and is positioned at the central position of the lower casing 605; the negative tab 603 is closely attached to the top cover 604 through the small hole 6073 of the upper rubber pad 6071 and is located at the center of the top cover 504.

In the above five embodiments, the positive electrode tab and the negative electrode tab may be connected to the positive plate and the negative plate by welding, or may be folded by folding without coating at the end of the positive plate or the negative plate to form a folded tab.

As shown in fig. 7, the pole pieces and the tabs are connected by welding. The respective ends of the positive electrode tab 708 and the negative electrode tab 709 are not coated, and the uncoated ends of the positive electrode tab 708 are welded to the positive electrode tab 702, and the uncoated ends of the negative electrode tab 609 are welded to the negative electrode tab 703.

As shown in fig. 8, the pole piece and the tab adopt a tab folding structure. The ends of the positive electrode tab 808 and the negative electrode tab 809 are not coated. The uncoated ends of the positive electrode sheet 808 were folded back to form positive electrode tabs 802, and the uncoated ends of the negative electrode sheet 809 were folded back to form negative electrode tabs 803.

The above embodiments are merely illustrative and not restrictive, and all equivalent changes and modifications made by the methods described in the claims are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a button cell without welding utmost point ear which characterized in that: comprises a battery cell, a positive tab, a negative tab, an upper cover, a lower shell and a rubber plug; the battery cell comprises a positive plate, a negative plate and a diaphragm, wherein the positive plate is connected with a positive tab, and the negative plate is connected with a negative tab; the upper cover and the lower shell form a cavity for placing a battery cell, and the battery cell is placed in the cavity; the rubber plug is positioned in the middle of the battery cell, the elasticity of the rubber plug enables the positive electrode tab to be tightly attached to the lower shell, and the negative electrode tab is tightly attached to the upper cover.

2. The button cell of claim 1 without welding tabs, wherein: the rubber plug is made of ethylene propylene diene monomer or polypropylene.

3. The button cell of claim 1 without welding tabs, wherein: the rubber plug is of a splicing structure, two ends of the rubber plug are made of ethylene propylene diene monomer or polypropylene materials, and the middle of the rubber plug is connected with the rubber plug through a spring, stainless steel or polypropylene materials.

4. The utility model provides a button cell without welding utmost point ear which characterized in that: comprises a battery cell, a positive tab, a negative tab, an upper cover, a lower shell and a rubber pad; the battery cell comprises a positive plate, a negative plate and a diaphragm, wherein the positive plate is connected with a positive tab, and the negative plate is connected with a negative tab; the upper cover and the lower shell form a cavity for placing a battery cell, and the battery cell is placed in the cavity; the rubber pad comprises an upper rubber pad and a lower rubber pad, the upper rubber pad is positioned at the upper end of the battery cell, the upper rubber pad presses the negative electrode lug, and the elasticity of the upper rubber pad enables the negative electrode lug to be tightly attached to the upper cover; the lower rubber mat is positioned at the lower end of the battery core, the positive lug is pressed by the lower rubber mat, and the elasticity of the lower rubber mat enables the positive lug to be tightly attached to the lower shell.

5. The button cell without welding tabs according to claim 1 or 4, wherein: the positive tab is welded with the lower shell or/and the negative tab is welded with the upper cover.

6. The button cell of claim 5 without welding tabs, wherein: the positive tab and the lower shell, and the negative tab and the upper cover are welded externally.

7. The button cell of claim 4 without welding tabs, wherein: the rubber pad is made of ethylene propylene diene monomer or polypropylene.

8. The button cell of claim 4 without welding tabs, wherein: the upper rubber mat or/and the lower rubber mat are/is provided with small holes, the positive electrode lugs are tightly attached to the lower casing through the small holes of the lower rubber mat, and the negative electrode lugs are tightly attached to the upper cover through the small holes of the upper rubber mat.

9. The button cell without welding tabs according to claim 1 or 4, wherein: the positive electrode tab or the negative electrode tab is of a tab folding structure, and the tail end of the positive electrode sheet or the negative electrode sheet is not coated and folded to form a tab folding structure.

10. The button cell without welding tabs according to claim 1 or 4, wherein: the positive electrode lug or the negative electrode lug is of a multi-lug structure, and the number of the positive electrode lugs or the negative electrode lugs is more than 1.