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Winding needle capable of improving deformation of coiled cell and winding method

A technology of battery cells and rolling needles, applied in circuits, electrical components, secondary batteries, etc., can solve the problems that affect the battery cycle characteristics and safety, and the battery cells are prone to deformation, so as to improve battery performance, small tension changes, Improve the effect of internal deformation

Active Publication Date: 2018-11-16
CHINA AVIATION LITHIUM BATTERY RES INST CO LTD +1
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in order to solve the technical problem that the battery core is prone to deformation during the winding process and the technical problem that the swelling in the subsequent battery forming process affects the cycle characteristics and safety of the battery in the prior art, the present invention provides an improved winding process. Winding needle and winding method deformed around the battery core

Method used

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  • Winding needle capable of improving deformation of coiled cell and winding method
  • Winding needle capable of improving deformation of coiled cell and winding method
  • Winding needle capable of improving deformation of coiled cell and winding method

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Embodiment Construction

[0022] The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

[0023] Such as figure 1 As shown, it is the best embodiment of the present invention, a winding needle that improves the deformation of the wound battery, including a left needle body 11 and a right needle body 12, and the outer contours of the left needle body 11 and the right needle body 12 are semicircular shape, the left needle body 11 and the right needle body 12 are arranged symmetrically from left to right to form a circular outer contour, and a clamping seam 13 is also formed between the left needle body 11 and the right needle body 12, and the inside of the clamping seam 13 A clamping needle for clamping / releasing the diaphragm 2 is provided, and the...

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Abstract

The invention relates to the technical field of cell manufacturing, and especially relates to a winding needle capable of improving the deformation of a coiled cell and a winding method. A round winding needle is adopted, thus the tension change during the winding process of a cell becomes smaller and more uniform, the internal deformation of the coiled cell is improved; the situation that after formation, reactions in batteries are not complete and lithium is precipitated out is avoided, and the battery performance is improved.

Description

technical field [0001] The invention relates to the technical field of electric core manufacturing, in particular to a winding needle and a winding method for improving the deformation of wound electric cores. Background technique [0002] Lithium-ion battery is a battery with high energy density and good environmental performance. It has the advantages of high energy, high reliability and good processability, so it is widely used in various fields, including various portable electronic devices, various Automobiles, transmission tools, etc. [0003] The battery cells in lithium-ion batteries generally have positive electrode sheets, separators and negative electrode sheets. At present, there is a problem of cell deformation during the winding process, which has a certain impact on the subsequent battery thickness, battery swelling after formation, cycle characteristics, and safety characteristics. Contents of the invention [0004] The technical problem to be solved by th...

Claims

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Application Information

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IPC IPC(8): H01M10/0587
CPCH01M10/0587Y02E60/10Y02P70/50
Inventor 黄兴龙
Owner CHINA AVIATION LITHIUM BATTERY RES INST CO LTD
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