CN110379990A - Button cell without welding tab - Google Patents

Abstract

The present invention discloses a button battery without welding pole ears, comprising a battery cell, a positive pole ear, a negative pole ear, an upper cover and a lower shell; the battery cell comprises a positive electrode sheet, a negative electrode sheet and a diaphragm, the positive electrode sheet is connected to the positive pole ear, and the negative electrode sheet is connected to the negative pole ear; the upper cover and the lower shell form a cavity for placing the battery cell; the button battery also comprises a rubber plug or a rubber pad, the rubber plug is located in the middle of the battery cell or the rubber pad is located in the middle and upper ends of the battery cell, so that the positive pole ear is closely fitted with the lower shell, and the negative pole ear is closely fitted with the upper cover. The beneficial effects of the present invention are: the rubber plug in the middle of the battery cell or the rubber pads at the upper and lower ends can squeeze the positive and negative pole ears so that the pole ears are closely fitted with the upper cover and the lower shell, and also provide convenience for subsequent external welding; a multi-pole ear structure is adopted to realize the fast charging function of the battery cell.

Description

A button battery without welding tabs

technical field

The invention relates to the technical field of batteries, in particular to a button battery without welding tabs.

Background technique

Button batteries are a type of small batteries, generally used in various small electronic products, such as electronic watches, electronic hearing aids, earphones, etc. Button batteries can be divided into metal shells and soft pack shells according to the shell materials. Among them, the button battery with a metal shell adopts the upper cover and the lower shell of the steel shell material to form a cell cavity for placing the cell. The traditional assembly method is that the battery is connected to the positive and negative tabs and enters the upper cover, the negative tab is attached to the top cover, the welding needle passes through the center of the battery, and the negative tab and the upper cover are welded internally, and the positive tab is connected to the top cover. It is welded with the lower shell, and then the upper cover and the lower shell are combined and compressed, and the upper cover and the lower shell are insulated with a sealing ring. Such an assembly method needs to weld the positive and negative tabs from the inside, which is cumbersome in assembly. In order to solve the problem of needing internal welding, the present invention provides a button battery without welding tabs, so that the positive and negative tabs can be connected with the upper cover and the lower case while being more convenient to operate.

Contents of the invention

The technical problem to be solved by the present invention is to provide a button battery without welding tabs for the above-mentioned deficiencies in the prior art.

In order to solve the above-mentioned technical problems, the first technical solution adopted by the present invention is: a button battery without welding tabs, comprising an electric core, a positive tab, a negative tab, an upper cover, a lower case and a rubber plug; the electric core includes Positive electrode sheet, negative electrode sheet and diaphragm, the positive electrode sheet is connected to the positive electrode ear, and the negative electrode sheet is connected to the negative electrode ear; the upper cover and the lower case form a cavity for placing the cell, and the cell is placed in the cavity; the rubber plug is located in the middle of the cell, and the The elasticity of the plug makes the positive ear and the lower case closely fit, and the negative ear and the upper cover tightly fit.

The second technical solution adopted by the present invention is: a button battery without welding tabs, including battery cells, positive tabs, negative tabs, upper cover, lower shell and rubber pad; the battery cell includes positive pole pieces, negative pole pieces and Diaphragm, the positive tab is connected to the positive ear, and the negative tab is connected to the negative ear; the upper cover and the lower case form a cavity for placing the battery cell, and the battery cell is placed in the cavity; the rubber pad includes an upper rubber pad and a lower rubber pad, and the upper rubber pad is located on the On the upper end of the battery cell, the upper rubber pad presses the negative electrode ear. The elasticity of the upper rubber pad makes the negative electrode ear fit closely with the upper cover; the lower rubber pad is located at the lower end of the battery cell, and the lower rubber pad presses the positive electrode ear. The elasticity of the lower rubber pad makes the positive electrode The ears fit snugly against the lower shell.

In the above technical solution, the positive tab is welded to the lower shell or/and the negative tab is welded to the upper cover.

In the above technical solution, the positive tab and the lower shell, and the negative tab and the upper cover are welded externally.

In the first technical solution, the rubber plug is made of EPDM or polypropylene.

In the first technical solution, the rubber plug is a spliced structure, the two ends of the rubber plug are made of EPDM or polypropylene material, and the middle is connected by a spring, stainless steel or polypropylene material.

In the second technical scheme, the material of the rubber pad is EPDM or polypropylene.

In the second technical solution, the upper rubber pad or/and the lower rubber pad are provided with small holes, the positive tab is closely attached to the lower case through the small hole of the lower rubber pad, and the negative electrode ear is closely connected to the upper cover through the small hole of the upper rubber pad. fit.

In the above technical solution, the positive tab or the negative tab is a folded tab structure, and the end of the positive or negative tab is not coated and folded to form a folded tab.

In the above technical solution, the positive tab or the negative tab has a multi-tab structure, and the number of the positive tab or the negative tab is more than one.

The beneficial effects of the present invention are: the rubber plug in the middle of the cell or the rubber pads at the upper and lower ends can squeeze the positive and negative tabs so that the tabs are closely attached to the upper cover and the lower case, and also provide convenience for subsequent external welding; The ear structure is used to realize the fast charging function of the battery.

Description of drawings

FIG. 1 is a schematic structural view of a button battery in the prior art.

Fig. 2 is a schematic structural diagram of Embodiment 1 of the present invention.

Fig. 3 is a schematic structural diagram of Embodiment 2 of the present invention.

Fig. 4 is a schematic structural diagram of Embodiment 3 of the present invention.

Fig. 5 is a schematic structural diagram of Embodiment 4 of the present invention.

Fig. 6 is a schematic structural diagram of Embodiment 5 of the present invention.

Fig. 7 is a schematic structural view of the first type of positive tab and negative tab according to the present invention.

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

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the button battery of the metal case in the prior art comprises electric core 101, positive pole lug 102, negative pole lug 103, upper cover 104 and lower case 105, and electric core 101 is made of positive pole sheet, negative pole piece and diaphragm The positive pole piece is connected to the positive pole ear 102 , and the negative pole piece is connected to the negative pole ear 103 . The battery cell 101 is put into the cavity formed by the upper cover 104 and the lower case 105 , and the upper cover 104 and the lower case 105 are insulated and separated by a sealing ring 106 . In the traditional assembly method, the cell 101 is connected to the positive tab 102 and the negative tab 103 and enters the upper cover 104, the negative tab 103 is attached to the surface of the upper cover 104, and then the welding pin passes through the center of the cell 101, Internally, the negative tab 103 and the upper cover 104 are welded, the positive tab 102 is welded with the lower case 105 before the shell is assembled, and finally the upper cover 104 and the lower case 105 are combined and compressed.

In order to avoid the cumbersome process of internal welding, the present invention provides a new technical solution for button batteries, using rubber plugs or rubber pads, the rubber plugs are located in the middle of the battery core or the rubber pads are located at the middle and upper ends of the battery core, so that the positive ear and the lower shell Tight fit, the negative tab is tightly fitted to the upper cover. In each embodiment, the positive and negative electrodes can be interchanged.

Embodiment one

As shown in Figure 2, the basic structure of a button battery without welding tabs includes the components of an existing button battery, including a cell 201, a positive tab 202, a negative tab 203, an upper cover 204 and a lower case 205, the upper The cover 204 and the lower case 205 are insulated and separated by a sealing ring 206 . Novel button battery has increased rubber plug 207 on the basis of former button battery. 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 electrode ear 203 on the surface of the upper cover 204, so that the negative electrode ear 203 and the upper cover 204 are closely attached, and the lower end of the rubber plug 207 pushes the positive electrode ear 202 on the bottom. The surface of the shell 205 makes the positive tab 202 and the lower shell 205 closely fit. The rubber plug 207 is made of insulating, corrosion-resistant and elastic materials, preferably EPDM or polypropylene, but not limited thereto. Under the action of the rubber plug 207, the contact between the positive and negative tabs and the shell can meet the normal use of the button battery.

Embodiment two

As shown in Figure 3, the basic structure of the second embodiment includes the components of the existing button battery, including the cell 301, the positive tab 302, the negative tab 303, the upper cover 304 and the lower case 305, the upper cover 304 and the lower case 305 The seal rings 306 are used to insulate and separate them. The second embodiment is improved on the basis of the first embodiment. The improved technical point is that the button battery adopts a multi-tab structure, and the number of positive tabs 302 or negative tabs 303 is more than one. In FIG. 3 , there are two positive tabs 302 and two negative tabs 303 , the positive tabs 302 are attached to each other, and the negative tabs 203 are also attached to each other.

In order to ensure stable contact, external welding can be performed on the outside of the assembled button battery, facing the upper or lower end of the rubber plug 307. The rubber plug 307 is very good for the positive ear 302 and the lower case 305, the negative ear 303 and the upper cover 304. The support provides favorable conditions for external welding. Among them, laser welding is preferred for external welding.

Embodiment three

As shown in Figure 4, the basic structure of the third embodiment includes the components of the existing button battery, including the cell 401, the positive tab 402, the negative tab 403, the upper cover 404 and the lower case 405, the upper cover 404 and the lower case 405 The sealing rings 406 are used to insulate and separate them. Embodiment 3 is improved on the basis of Embodiment 2. The technical point of improvement is that the rubber plug 407 is a spliced structure, and the two ends of the rubber plug 407 are still made of materials with insulation, corrosion resistance and certain elasticity, preferably three-dimensional Ethylene propylene or polypropylene, but not limited thereto; the middle part of the rubber plug 407 is made of spring, stainless steel or polypropylene material to connect the two ends of the rubber plug 407 to meet different strength and elasticity requirements.

Embodiment Four

As shown in Figure 5, a basic structure of a button battery without welding tabs includes an electric core 501, a positive tab 502, a negative tab 503, an upper cover 504 and a lower case 505, and its connection structure is similar to that of a button in the prior art. Batteries are consistent. On this basis, a rubber pad 507 is added to the new button battery. The rubber pad 507 includes an upper rubber pad 5071 and a lower rubber pad 5072 . The upper rubber pad 5071 is located at the upper end of the battery cell 501, and the negative plate 503 is wound on the surface of the upper rubber pad 5071, and is closely attached to the upper cover 504 under the action of the upper rubber pad 5071; similarly, the lower rubber pad 5072 is located at the lower end of the battery cell 501, The positive electrode sheet 502 is wound on the surface of the lower rubber pad 5072 and closely attached to the lower case 505 . Wherein, the rubber pad 507 is made of insulating, corrosion-resistant and elastic materials, preferably EPDM or polypropylene, but not limited thereto. In order to ensure stable contact, external welding is performed at the joint position of the upper rubber pad 5071 and the upper cover 504, and the joint position of the lower rubber pad 5072 and the lower shell 505. Laser welding is preferred for external welding. In this embodiment, the button battery adopts a multi-tab structure, and the number of positive tabs or negative tabs is more than one. In FIG. 5 , there are two positive tabs 502 and two negative tabs 503 , the positive tabs 502 are attached to each other, and the negative tabs 503 are also attached to each other. External welding can be performed between the positive tabs 502 or between the negative tabs 503 to improve contact.

Embodiment five

As shown in Figure 6, the basic structure of the fourth embodiment includes the components of the existing button battery, including the cell 601, the positive tab 602, the negative tab 603, the upper cover 604 and the lower case 605, the upper cover 604 and the lower case 605 The sealing rings 606 are used to insulate and separate them. Embodiment 5 improves on the technique of Embodiment 4. The improved technical point is that the rubber pad 607 includes an upper rubber pad 6071 and a lower rubber pad 6072 . The rubber pad 607 is made of insulating, corrosion-resistant and elastic materials, preferably EPDM or polypropylene, but not limited thereto. The upper rubber pad 6071 and the lower rubber pad 6072 are respectively provided with a small hole 6073, the positive electrode ear 602 is closely attached to the lower case 605 through the small hole 6073 of the lower rubber pad 6072, and is located at the center of the lower case 605; the negative electrode ear 603 passes through The small hole 6073 of the upper rubber pad 6071 fits tightly with the upper cover 604 and is located at the center of the upper cover 504 .

In the above-mentioned five embodiments, the positive tab and the negative tab can be connected to the positive and negative tabs by welding, or the tab can be folded, and the end of the positive tab or the negative tab is not coated and folded , forming folded pole ears.

As shown in Figure 7, the pole piece and the pole lug are connected by welding. The respective ends of the positive electrode sheet 708 and the negative electrode sheet 709 are not coated, the two ends of the positive electrode sheet 708 that are not coated are welded to the positive tab 702, and the two ends of the negative electrode sheet 609 that are not coated are connected to the negative tab 703 by welding.

As shown in Figure 8, the pole pieces and tabs adopt a folded tab structure. Neither end of each of the positive electrode sheet 808 and the negative electrode sheet 809 was coated. The two ends of the positive electrode sheet 808 that are not coated are folded to form the positive electrode tab 802 , and the two ends of the negative electrode sheet 809 that are not coated are folded to form the negative electrode ear 803 .

The above embodiments are only intended to illustrate rather than limit the present invention, so all equivalent changes or modifications made according to the methods described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims (10)

1. a kind of button cell without soldering polar ear, it is characterised in that: including battery core, anode ear, negative electrode lug, upper cover, lower casing And rubber plug；The battery core includes positive plate, negative electrode tab and diaphragm, and positive plate connects anode ear, and negative electrode tab connects negative electrode lug；It is described Upper cover and the lower casing form the cavity for placing battery core, and battery core is put into cavity；The rubber plug is located at the centre of battery core, rubber plug Elasticity fits closely anode ear with lower casing, and negative electrode lug is fitted closely with upper cover.

2. a kind of button cell without soldering polar ear, it is characterised in that: including battery core, anode ear, negative electrode lug, upper cover, lower casing And rubber mat；The battery core includes positive plate, negative electrode tab and diaphragm, and positive plate connects anode ear, and negative electrode tab connects negative electrode lug；It is described Upper cover and the lower casing form the cavity for placing battery core, and battery core is put into cavity；The rubber mat includes upper rubber mat and lower rubber mat, on Rubber mat is located at battery core upper end, and upper rubber mat is pressing against negative electrode lug, and the elasticity of upper rubber mat fits closely negative electrode lug with upper cover；Lower rubber mat position In battery core lower end, lower rubber mat is pressing against anode ear, and the elasticity of lower rubber mat fits closely anode ear with lower casing.

3. a kind of button cell without soldering polar ear according to claim 1 or 2, it is characterised in that: the anode ear It is mutually welded with the lower shell phase welding or/and the negative electrode lug with the upper cover.

4. a kind of button cell without soldering polar ear according to claim 3, it is characterised in that: the anode ear and institute Lower casing, the negative electrode lug and the upper cover are stated using outside weldings.

5. a kind of button cell without soldering polar ear according to claim 1, it is characterised in that: the material of the rubber plug For EPDM or polypropylene material.

6. a kind of button cell without soldering polar ear according to claim 1, it is characterised in that: the rubber plug is splicing Structure, rubber plug both ends are EPDM or polypropylene material, intermediate spring, stainless steel or polypropylene material connection.

7. a kind of button cell without soldering polar ear according to claim 2, it is characterised in that: the material of the rubber mat For EPDM or polypropylene material.

8. a kind of button cell without soldering polar ear according to claim 2, it is characterised in that: the upper rubber mat or/ It is equipped with aperture with the lower rubber mat, anode ear is fitted closely by the aperture of lower rubber mat with lower casing, and negative electrode lug passes through upper rubber mat Aperture fitted closely with upper cover.

9. a kind of button cell without soldering polar ear according to claim 1 or 2, it is characterised in that: the anode ear Or the negative electrode lug is to roll over extreme ear structure, the end of positive plate or negative electrode tab is not coated with and is turned down, and forms folding tab.

10. a kind of button cell without soldering polar ear according to claim 1 or 2, it is characterised in that: the anode ear Or the negative electrode lug is multipole ear structure, the quantity of anode ear or negative electrode lug is 1 or more.