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Button cell explosion-proof sealing structure, button cell and packaging method thereof

A button battery and sealing structure technology, which is applied to sealing materials, secondary batteries, structural parts, etc., can solve the problems of poor corrosion resistance and short service life, and achieve the effects of compact structure, compact connection and low manufacturing cost

Pending Publication Date: 2021-10-08
东莞市电的电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the patent prevents the electrolyte from leaking to the external electronic equipment along the through hole during normal use of the battery by melting the explosion-proof membrane to a certain extent, but compared with the sealed stainless steel shell, the button battery has poor corrosion resistance and a short service life

Method used

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  • Button cell explosion-proof sealing structure, button cell and packaging method thereof
  • Button cell explosion-proof sealing structure, button cell and packaging method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Example 1: Reference figure 1 , 2, a button battery explosion-proof sealing structure, the structure is mainly used for the shell of the battery, especially the button battery, the technical solution proposed in this embodiment aims to avoid damage to electronic equipment or While causing adverse effects on the users of electronic equipment, it is necessary to further improve the structural stability of the cover and the battery as a whole due to the explosion-proof structure. The structure includes a housing 1 having a bottom surface and a side wall extending around the edge of the bottom surface. In this embodiment, the housing 1 is a cylindrical structure with an upper end opening; The plate 2 is connected with the shell 1 to form a hollow cavity. The shell 1 and the cover plate 2 are made of stainless steel. The shell 1 and the cover plate 2 made of stainless steel can prevent the battery from rusting and prolong the service life of the battery; It also includes a...

Embodiment 2

[0040] Example 2: Reference figure 1 and figure 2 , a button battery in this embodiment, including the explosion-proof sealing structure of the button battery described in Embodiment 1; it also includes an electrode assembly 8 and an electrolyte located inside the cavity, and one side of the electrode assembly 8 is connected to the shell through a positive electrode conductor 10 On the body 1 or the cover plate 2, the other side of the electrode assembly 8 is connected to the explosion-proof column 5 through the negative electrode conductor 11, and an insulating pad 9 is provided between the electrode assembly 8 and the bottom surface of the casing 1, and the insulating pad 9 is in the shape of a disc. The surface area of ​​the insulating pad 9 may be equal to or smaller than that of the bottom surface of the housing 1 , and the material of the insulating pad 9 includes one or more of polypropylene, propylene-ethylene copolymer, polyether ether ketone, and polyvinylidene fluo...

Embodiment 3

[0043] Embodiment 3: a kind of packing method of button cell, this method is used for packing the button cell described in embodiment 2, and it comprises the following steps:

[0044] S1, coating the periphery and the inner wall of the explosion-proof hole 7 with a sealing insulating layer 6;

[0045] Specifically, the periphery of the explosion-proof hole 7 on the cover plate 2 and the inner wall of the explosion-proof hole 7 are coated with a sealing insulating layer 6, and the area of ​​the sealing insulating layer 6 is not less than the area of ​​the electrode sheet 4 to ensure insulation between the electrode sheet 4 and the cover plate 2. connect. The edge of the explosion-proof hole 7 integrally extends along the direction of the cavity to form a hollow clamping sleeve 3 , and the inner wall of the clamping sleeve 3 is also coated with a sealing insulating layer 6 .

[0046] S2. Attach the electrode piece 4 to the sealing insulating layer 6 on one side of the cover pla...

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Abstract

The invention discloses a button cell explosion-proof sealing structure, a button cell and a packaging method thereof, and relates to the technical field of cell structures. The explosion-proof sealing structure comprises a shell provided with a bottom surface and a side wall extending around the edge of the bottom surface, the edge of the upper end of the shell is connected with a cover plate in a sealed mode, the cover plate and the shell form a hollow containing cavity, and an explosion-proof hole is formed in the cover plate; an electrode plate is arranged on the outer side of the cover plate, one side of the electrode plate is integrally connected with an explosion-proof column matched with the explosion-proof hole, and the explosion-proof column extends into the containing cavity along the explosion-proof hole; and a sealing insulating layer is arranged between each of the electrode plate and the explosion-proof column and the cover plate. The sealing structure is compact in connection, the explosion-proof hole is sealed through the explosion-proof column, when the air pressure in the containing cavity is increased, the explosion-proof column is ejected out to achieve the pressure relief effect of the explosion-proof hole, and the shell is prevented from expanding and exploding; and the edge of the explosion-proof hole integrally extends in the direction of the containing cavity to form a clamping sleeve, the explosion-proof column is clamped in the clamping sleeve, a sealing insulation layer is arranged between the explosion-proof column and the inner wall of the clamping sleeve, and the sealing insulation performance is good.

Description

technical field [0001] The invention belongs to the technical field of battery structures, and in particular relates to an explosion-proof sealing structure of a button battery, a button battery and a packaging method thereof. Background technique [0002] Rechargeable lithium-ion batteries are widely used in sustainable electronic devices, such as coin cells in mobile phones and Bluetooth headsets. In smaller and more sophisticated equipment, battery volume energy density is a key consideration, such as hearing aids, wireless Bluetooth headsets, electronic watches, gastroenteroscope swallowing equipment, etc.; due to the high volume requirements for rechargeable lithium-ion batteries In order to reduce the volume of the battery while ensuring the application efficiency of the battery, button batteries with spirally wound or laminated electrodes are often used to increase the energy density in a limited volume. [0003] The traditional button battery generally has a double-...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M50/109H01M50/153H01M50/169H01M50/186H01M50/188H01M50/342H01M10/058
CPCH01M10/0525H01M50/109H01M50/153H01M50/169H01M50/186H01M50/188H01M50/342H01M10/058Y02P70/50Y02E60/10
Inventor 廖建华邬永缜
Owner 东莞市电的电子有限公司
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