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Cylindrical battery

A technology of cylindrical batteries and cells, which is applied to battery components, circuits, electrical components, etc., can solve the problems of battery short circuit, battery capacity drop, and easy misalignment, etc., and achieve the effect of broadening the application field

Active Publication Date: 2009-04-01
SHENZHEN BAK POWER BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The winding needle is displaced relative to the battery core, so that the winding needle is easily oxidized due to contact with the positive electrode of the battery, and thus brings various safety hazards
In addition, the spacer is only placed at the end of the battery cell. When the battery vibrates strongly, the spacer will move due to assembly tolerances, needle movement, loose winding of the battery core, etc., and will no longer be constrained by the battery cell. The two ends make the positive and negative pole pieces in the battery cell easily misaligned during strong vibration, resulting in a decrease in battery capacity; even the tabs come into contact with pole pieces of opposite polarity, resulting in safety issues such as battery short circuit

Method used

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Examples

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Embodiment Construction

[0020] Such as figure 1 , 2 As shown, in a preferred embodiment of the cylindrical battery of the present invention, a casing 1 is included. The opening end of the casing 1 is provided with a sealing cover 70, and the casing 1 is provided with a battery core 30. Wherein, the casing 1 may be open at both ends, or may be open at one end, and the sealing cover 70 is sealed and arranged at the opening of the casing 1.

[0021] A winding needle 40 is provided in the reel hole 31 in the battery core 30. The winding needle 40 is preferably arranged in a hollow tube shape with a through hole 41 in the center. The through hole 41 is located at both ends of the winding needle 40 and is provided with internal threads 42 . The two ends of the battery core 30 are provided with spacers 50, the spacer 50 is provided with a central hole 51 facing the battery reel hole 31, and a fixed cover 60 is provided in the central hole 51, and the fixed cover 60 passes through the central hole 51 The insert...

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Abstract

The invention relates to a cylindrical battery, comprising a shell body, an electric core which is arranged in the shell body and a sealing cover which seals the shell body, ring spacers are respectively arranged at the two ends of a winding needle in a scroll hole of the electric core, and the ring spacers are fixedly connected with the two ends of the winding needle by fasteners or fastening structures. The electric core is tightly clamped between the two ring spacers by fixedly connecting the ring spacers which are positioned at the two ends of the electric core and the ends of the winding needle which is positioned in the scroll hole of the electric core, thereby fixedly connecting the three together, being capable of resisting the impacts caused by severe vibration and further leading the cylindrical battery to be safer during the using process and being applicable to various environments with strong vibration and heavy jolt.

Description

Technical field [0001] The present invention relates to battery technology, and more specifically, to a cylindrical battery. Background technique [0002] The battery core in the cylindrical battery in the prior art is usually a hollow cylindrical structure, which is a reel hole generated during winding. Generally, a core rod is arranged in the reel hole to bear the pole group during the winding process of the battery. The expansion stress prevents loosening of the inside of the battery core. In order to facilitate the winding of the pole piece, the core rod sometimes adopts a cylindrical tubular structure winding needle. When winding the pole piece, the winding needle is placed on the winding machine first, and a certain number of diaphragms are wound on the winding needle, and then the positive and negative sheets are placed in sequence. The positive and negative sheets are separated by a separator. After winding the battery core, take out the winding needle together with the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/00H01M2/14H01M50/107H01M50/46
CPCY02E60/10
Inventor 刘道坦胡领坡
Owner SHENZHEN BAK POWER BATTERY CO LTD
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