Sealing structure of cylindrical battery and cylindrical battery
A sealing structure and battery technology, applied in small-sized batteries/battery packs, sealing materials, battery boxes/jackets, etc., can solve the problems that affect the battery's anti-drop performance and safety performance, affect the increase of internal substances in the battery, and short-circuit the battery.
Pending Publication Date: 2022-07-15
FUJIAN NANPING NANFU BATTERY
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Problems solved by technology
With the need to improve battery performance, the original sealing ring structure affects the increase of internal materials in the battery, thereby affecting the implementation of the solution to improve battery performance
In addition, due to the inherent structural problems of the sealing ring of the existing alkaline battery, the situation of the sealing ring covering the isolation tube is not ideal. When the battery is dropped, the negative electrode material inside the battery overflows from the opening of the isolation tube or The negative electrode material breaks through the opening of the isolation tube and overflows from the damaged part, resulting in an occasional short circuit inside the battery, which in turn affects the drop resistance and safety performance of the battery
Method used
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Embodiment Construction
[0022] The sealing structure of the cylindrical battery of the present invention and the best specific embodiment of the cylindrical battery are described in detail below in conjunction with the accompanying drawings:
[0023] combine figure 1 and figure 2 , a sealing structure of a cylindrical battery, comprising a cylindrical battery sealing ring 20 for sealing the upper end opening of the battery steel case 10;
[0024] The sealing ring 20 is composed of a center column 21 arranged along the central axis direction of the battery steel case 10 , and a battery steel case contact portion that contacts the inner peripheral surface 11 of the opening when the battery steel case 10 is sealed. 22, and the annular disk-shaped portion 23 connected and arranged between the central column 21 and the contact portion 22 of the battery steel shell;
[0025] A section of the annular disc-shaped portion 23 close to the central column 21 is inclined downward along the radial extending dir...
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The invention provides a sealing structure of a cylindrical battery and the cylindrical battery. The sealing structure comprises a sealing ring for the cylindrical battery, wherein the sealing ring is arranged for sealing an opening part at the upper end of a battery steel shell; the sealing ring consists of a central column, a battery steel shell contact part and an annular disc-shaped part connected between the central column and the battery steel shell contact part; one section, close to the central column, of the annular disc-shaped part is inclined downwards in the radial extending direction from the periphery to the center to form an annular slope section, the inclined lower end of the slope section extends downwards to the peripheral face of the central column, the inclined upper end of the slope section is provided with a negative electrode cover abutting part, and the slope section is provided with an anti-explosion groove. According to the invention, the internal force of the battery on the slope section is decomposed and then becomes small, so that the battery can be stored for a long time without liquid leakage; in addition, the volume of effective filling reaction substances in the battery is also larger; the sealing ring is simple in structure, and injection molding difficulty is reduced.
Description
technical field [0001] The present invention relates to the field of battery components, in particular to a sealing structure of a cylindrical battery and a cylindrical battery. Background technique [0002] For cylindrical batteries (such as alkaline batteries), the combination of the sealing ring, the copper needle and the bottom cover (also called "negative electrode cover") is called the current collector, and the sealing ring is between the battery copper needle, the bottom cover (also called the "negative electrode cover") Between the "negative electrode cover") and the battery steel shell, it mainly plays the role of sealing the internal space of the battery, preventing the leakage of the battery's liquid during normal use, and preventing the battery from exploding during abnormal use. [0003] Under the circumstance that the external dimension of the battery is limited and the sealing ring occupies part of the space inside the battery, the smaller the vertical distan...
Claims
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Login to View More IPC IPC(8): H01M50/186H01M50/463H01M50/107
CPCH01M50/186H01M50/463H01M50/107
Inventor 王晓飞江铭林建兴严瑞兴钟晓桥周章贵廖超
Owner FUJIAN NANPING NANFU BATTERY