CN212571152U

CN212571152U - Button cell

Info

Publication number: CN212571152U
Application number: CN202021652902.0U
Authority: CN
Inventors: 卢灿生
Original assignee: Hunan Meini Technology Co ltd
Current assignee: Hunan Meini Technology Co ltd
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2021-02-19
Anticipated expiration: 2030-08-11

Abstract

The utility model discloses a button cell, the electric core is packaged in the upper aluminum shell and the lower aluminum shell, the electric core comprises a positive plate and a negative plate, the positive plate is wound and wrapped outside the negative plate, and a diaphragm is arranged between the positive plate and the negative plate; the positive plate is connected to the positive electrode, the negative plate is connected to the negative electrode, and the upper aluminum shell wall is further provided with one or more pressure relief grooves. According to the method, a welding process is adopted, the problem of capillary liquid seepage is solved, the internal electric core adopts a structure that the anode wraps the cathode, the space utilization rate is improved, so that the volume capacity ratio is improved, the upper aluminum shell wall adopts a pressure relief groove designed with a safe thin wall, the safety is greatly improved, the button cell can be made thicker, the capacity is higher, and meanwhile, the safety of the cell is guaranteed; the structure has the advantages of large conductive area and good rate capability, and is suitable for popularization and use.

Description

Button cell

Technical Field

The utility model relates to a battery device, concretely relates to button cell.

Background

The button cell has wide application field, most of the button cells in the market at present are primary button cells, can not be recycled, and have small discharge current. Along with the development of science and technology, wearable portable electronic product is more and more, uses frequently like intelligent bracelet, blood pressure measuring apparatu, bluetooth headset, and the consumption is also bigger and bigger, and a button cell battery just can't satisfy its demand in this time, and uses a battery not only to face extravagant and environmental pollution problem, makes electronic product's life restricted greatly moreover.

At present, a steel shell button type secondary lithium ion battery manufactured by a stamping packaging process also appears in the market, but the battery is easy to generate capillary liquid seepage, has short service life and is limited in application.

SUMMERY OF THE UTILITY MODEL

To the above problem, the present invention is directed to a button cell.

In order to realize the technical purpose, the utility model discloses a scheme is: a button cell comprises an upper aluminum shell, a lower aluminum shell and a cell, wherein the upper aluminum shell and the lower aluminum shell are clamped and combined into an oblate button structure;

the positive plate is connected to the positive electrode, the negative plate is connected to the negative electrode, the upper aluminum shell wall with a trapezoidal cross section is arranged at the upper portion of the upper aluminum shell, two or more pressure relief grooves are symmetrically arranged on the upper aluminum shell wall, the cross sections of the pressure relief grooves are of arc-shaped belt structures, and the thickness of the inner side wall of each pressure relief groove is smaller than that of the rest portion of the upper aluminum shell wall.

Preferably, the upper aluminum case is welded to terminals from which positive and negative current flows.

Preferably, a layer of insulating sealing rubber ring is arranged between the positive electrode and the negative electrode.

Preferably, the thickness of the upper aluminum shell is 0.1-0.15 mm.

Preferably, one end of the positive plate is further connected to the outer ring aluminum foil, and the outer ring aluminum foil is in direct contact with the upper aluminum shell.

The utility model has the advantages that: according to the method, a welding process is adopted, the problem of capillary liquid seepage is solved, the internal electric core adopts a structure that the anode wraps the cathode, the space utilization rate is improved, so that the volume capacity ratio is improved, the upper aluminum shell wall adopts a pressure relief groove designed with a safe thin wall, the safety is greatly improved, the button cell can be made thicker, the capacity is higher, and meanwhile, the safety of the cell is guaranteed; the structure has the advantages of large conductive area and good rate capability, and is suitable for popularization and use.

Drawings

FIG. 1 is a cross-sectional view of the present invention;

fig. 2 is a bottom view of the present invention;

fig. 3 is a schematic structural diagram of the present invention.

Wherein: 1. mounting an aluminum shell; 2. an electric core; 21. a positive plate; 22. a negative plate; 23. a diaphragm; 3. a positive electrode; 4. a negative electrode; 5. a pressure relief groove; 6. insulating and sealing the rubber ring; 7. and (5) arranging an aluminum shell.

Detailed Description

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

As shown in fig. 1-3, the embodiment of the present invention is a button cell, wherein the upper aluminum shell 1 and the lower aluminum shell 7 are connected to form an oblate button structure, the aluminum shell is a battery case made of aluminum alloy, the thickness of the upper aluminum shell and the lower aluminum shell is preferably 0.1-0.15mm, and the reason for using the aluminum shell for packaging the lithium battery is that the lithium battery has light weight and is safer than the steel shell, which has significant safety performance considerations. The battery cell 2 is packaged in the upper aluminum shell 1 and the lower aluminum shell 7, the battery cell 2 comprises an anode plate 21 and a cathode plate 22, the steel shell button type shell is generally a cathode, the internal battery cell generally adopts a cathode to wrap the anode of the anode, so that the space utilization rate of the anode is low, the volume capacity ratio of the battery is directly influenced, and in order to improve the condition, the anode plate 21 of the utility model is wrapped outside the cathode plate 22 in a winding way, and a diaphragm 23 is arranged between the anode plate 21 and the cathode plate 22;

the steel-shell button cell is not provided with a pressure relief groove and can only be used for bearing a secondary battery with very small capacity, because the pressure relief power of the battery with large capacity is very large, the design without the pressure relief groove can cause that the battery cannot be timely decompressed when being applied in an extreme state or the battery has defects inside, so that explosion and fire are caused, an independent pressure relief structure is independently arranged, so that the installation cost is increased, and if one pressure relief structure fails, the safety performance can be greatly reduced; this application is provided with a plurality of pressure release recesses, can reduce the probability of inefficacy as far as possible, just produces its thin-walled characteristics through pressure release recess man-hour simultaneously, and the preparation degree of difficulty is little, need not extra installation, and concave inboard is also difficult to be destroyed pressure release recess by the foreign object extrusion in addition.

The utility model discloses an anodal piece 21 is connected to anodal 3, and negative pole piece 22 is connected to negative pole 4, the utility model discloses a be equipped with one deck insulating seal rubber ring 6 between anodal 3 and the negative pole 4, respect for insulation protection.

The utility model discloses be trapezoidal cross section's last aluminum hull wall on 1 upper portion of last aluminum hull, go up the pressure release recess 5 that still the symmetry was provided with two or more than two on the aluminum hull wall, the cross section of pressure release recess 5 is arc tape structure, the thickness of 5 inside walls of pressure release recess is less than the thickness of the all the other parts of last aluminum hull wall. . The main effect of pressure release recess is in time cutting off battery current, increases factor of safety, and specifically, the pressure release recess adopts the rubber cap sealed, and the control switching is pressed, can guarantee that the pressure release recess takes out electrolyte when the exhaust. When the battery normally works, the pressure relief groove is in a closed sealing state, if the internal pressure of the battery is greater than a set value, the pressure relief groove is opened for pressure relief immediately, if the internal pressure of the battery is less than the set value, the pressure relief groove is closed for sealing, if the battery is in abnormal work, if the battery is extruded, penetrates and other abnormal conditions cause short circuit of the battery, the internal pressure of the battery is increased sharply, the valve core structure of the pressure relief groove pops out instantly, the pressure is released rapidly, and the explosion of the battery is avoided.

The mechanical stamping sealing process adopted by the existing steel-shell button cell has the problem of capillary liquid seepage, has high liquid leakage probability after long-term use, and is not suitable for being popularized on a lithium ion battery with long secondary service life; the positive plate 21 one end still is connected to the outer lane aluminium foil, and outer lane aluminium foil and last aluminium hull 1 direct contact increase electrically conductive area, and the multiplying power performance is good, supports the point of putting of big multiplying power, and the sealed technology of welding stops the weeping problem, supports the long-life several years and uses.

According to the method, a welding process is adopted, the problem of capillary liquid seepage is solved, the internal electric core adopts a structure that the anode wraps the cathode, the space utilization rate is improved, so that the volume capacity ratio is improved, the upper aluminum shell wall adopts a pressure relief groove designed with a safe thin wall, the safety is greatly improved, the button cell can be made thicker, the capacity is higher, and meanwhile, the safety of the cell is guaranteed; the structure has the advantages of large conductive area and good rate capability, and is suitable for popularization and use.

The above, only do the preferred embodiment of the present invention, not used to limit the present invention, all the technical matters of the present invention should be included in the protection scope of the present invention for any slight modification, equivalent replacement and improvement of the above embodiments.

Claims

1. A button cell battery, characterized in that: the battery comprises an upper aluminum shell, a lower aluminum shell and a battery cell, wherein the upper aluminum shell and the lower aluminum shell are clamped and combined into an oblate buckle structure, the battery cell is packaged in the upper aluminum shell and the lower aluminum shell, the battery cell comprises a positive plate and a negative plate, the positive plate is wound and wrapped outside the negative plate, and a diaphragm is arranged between the positive plate and the negative plate at intervals;

2. The button cell according to claim 1, characterized in that: the upper aluminum shell is welded with the terminals led out by the current of the anode and the cathode.

3. The button cell according to claim 1, characterized in that: and a layer of insulating sealing rubber ring is arranged between the anode and the cathode.

4. The button cell according to claim 1, characterized in that: the thickness of the upper aluminum shell is 0.1-0.15 mm.

5. The button cell according to claim 1, characterized in that: and one end of the positive plate is also connected to the outer ring aluminum foil, and the outer ring aluminum foil is in direct contact with the upper aluminum shell.