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Current collection body for battery

A technology of battery collection and conductor nails, which is applied in the direction of electrode carriers/current collectors, battery components, circuits, etc., can solve the problems of uneven density of sealing rings, poor reliability, and reduced battery reliability, etc., and achieve large active material filling Space, reduced thickness, and improved capacitance

Inactive Publication Date: 2010-06-02
ZHONGYIN NINGBO BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the existing sealing rings are usually processed by radial injection molding process. During the injection molding process, the injection molding material diverges and flows from its center to the surroundings. The above-mentioned air guide ports 117 existing between the raised structures 116 will locally change the injection molding process in the mold. The radial flow direction of the material leads to uneven density of the formed sealing ring
However, the mass distribution of the sealing ring 11 is required to achieve a relatively high degree of uniformity. The reason is that the uneven density will lead to problems such as easy cracking and brittleness of the sealing ring, which will significantly shorten its service life and may cause liquid leakage. reduce battery reliability
Current collectors in the prior art cannot overcome this contradiction, and the service life of the sealing ring must be short and the reliability must be poor

Method used

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Embodiment approach

[0058] Compared with the above-mentioned first embodiment, the second embodiment of the bottom cover provided by the present invention changes the specific shape of the protruding structure.

[0059] In the second specific implementation manner, the protruding structure may specifically be a bar-shaped boss 225 arranged along the radial direction of the bottom cover 22 . The bar-shaped protrusion 225 can also be formed by stamping, and has a top surface extending radially along the bottom cover 22 . The position of the strip-shaped boss 225 should be properly selected to ensure that the top surface of the strip-shaped boss 225 can support it when the main plane 213 of the sealing ring 21 falls due to the rupture of the annular explosion-proof groove 215 .

[0060] Only one bar-shaped boss 225 may be provided. In order to further ensure the unimpeded flow of the air leakage channel, a plurality of bar-shaped bosses 225 may be provided. Preferably, the number of strip-shaped b...

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PUM

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Abstract

The invention discloses a battery collector body. A sealing ring thereof is a rotating body; and the bottom cover of the rotating body is provided with a raised structure protruding towards the sealing ring simultaneously and is used for supporting the sealing ring when the sealing ring falls down due to a broken explosion-proof channel, thereby a broken opening communicating with the sealing ringand a deflation channel of a deflation hole on the bottom cover are formed. Because the sealing ring is the rotating body, the mass distribution of the sealing ring is more uniform during the injection mold and processing, thereby the problem that the sealing ring is easy to friable and broken in the prior art is effectively avoided, the service life is prolonged, and the reliability is improved.In addition, because the thickness of the sealing ring is relatively lower, the inside of the battery is ensured to have larger space filled with active substances, thereby the capacitance of the battery is obviously improved.

Description

technical field [0001] The invention relates to the field of battery sealing and explosion protection, in particular to a battery current collector structure. Background technique [0002] The current collector is an important structure in the battery, and its functions mainly include three aspects: one is to collect and transmit the current generated by the negative part of the battery inside; the other is to seal, that is, to close the opening at the bottom of the battery case; the third is to prevent explosions , to prevent the battery from exploding due to its internal gas pressure being too high. [0003] Please refer to figure 1 , figure 2 as well as image 3 , figure 1 It is a structural schematic diagram of a battery current collector in the prior art; figure 2 for figure 1 Schematic diagram of the structure of the sealing ring in the current collector shown; image 3 for figure 2 Bottom view of the seal shown. [0004] The current collector usually inclu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/08H01M2/12H01M2/30H01M4/64H01M50/184H01M50/186H01M50/342H01M50/543
CPCY02E60/12Y02E60/10
Inventor 谢红卫王静峰
Owner ZHONGYIN NINGBO BATTERY CO LTD
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