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Cells for wound lithium batteries and wound lithium batteries

A lithium battery, wound-type technology, applied in the direction of alkaline battery electrodes, secondary batteries, non-aqueous electrolyte batteries, etc., can solve the problems of complex assembly operations, poor heat dissipation performance of batteries and high-rate discharge performance, and achieve easy installation , high yield and simple method

Active Publication Date: 2011-12-07
SHANGHAI BYD
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AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems of subsequent processing and complex assembly operations caused by the tabs being located on the same side after the integrated tabs are wound, and the poor heat dissipation performance and high-rate discharge performance of the battery after the tabs are punched, one aspect of the present invention is to provide a winding type Lithium battery cell, which includes a positive electrode sheet, a separator and a negative electrode sheet stacked and wound in sequence, the winding end of the positive electrode sheet integrally forms a positive electrode ear, and the winding end of the negative electrode sheet integrally forms a negative electrode ear , wherein, the positive tab and the negative tab are respectively formed on the upper and lower surfaces of the battery and are located on both sides of the battery

Method used

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  • Cells for wound lithium batteries and wound lithium batteries
  • Cells for wound lithium batteries and wound lithium batteries
  • Cells for wound lithium batteries and wound lithium batteries

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Embodiment Construction

[0020] figure 1 Shown is the structure of the cell according to the present invention. The cell 10 includes a positive electrode sheet 14 , a negative electrode sheet 15 , a separator 13 , a positive electrode tab 11 and a negative electrode tab 12 . Wherein, both the pole piece and the separator are strip-shaped, and the positive and negative electrode pieces are formed by coating the positive and negative current collectors with polar dressings. , Negative electrode sheets are wound together to form the battery core, the tab is connected to the end of the winding of the pole sheet, and the tab is the part of the end of the current collector that is not coated with a polar coating, that is, the current collector Therefore, the lug is a current collector lug, which is integrated with the pole piece. Specifically, the winding end of the positive electrode sheet 14 integrally forms a positive electrode ear 11, and the winding end of the negative electrode sheet 15 integrally fo...

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Abstract

A battery core of a wound lithium battery, the battery core includes a positive electrode sheet, a separator and a negative electrode sheet stacked and wound in sequence, the winding end of the positive electrode sheet integrally forms a positive ear, and the winding of the negative electrode sheet The end is integrally formed with negative tabs, and the positive tabs and negative tabs are respectively formed on the upper and lower surfaces of the battery core and located on both sides of the battery core. The electric core is easy to manufacture and assemble into a battery, and has wide and thin integrated tabs, thereby obtaining a relatively large current conduction area, high-rate discharge performance and good heat dissipation performance.

Description

technical field [0001] The invention relates to a lithium battery, in particular to a battery core of a winding lithium battery and a winding lithium battery with the battery core. Background technique [0002] Lithium batteries are widely used in many fields, especially mobile phones and electronics industries, due to their outstanding characteristics such as high working voltage, large specific energy, and low self-discharge. The structure, performance and manufacturing process of lithium batteries have also been continuously improved. With the continuous development of lithium battery applications, the automotive industry is gradually using lithium batteries to provide power. At present, the structure of lithium batteries mainly includes laminated type and winding type. The present invention relates to a winding lithium battery. [0003] At present, the battery core of the wound lithium battery includes a positive electrode sheet, a negative electrode sheet, a separato...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/40H01M10/38H01M4/64H01M4/26H01M6/16
CPCY02E60/124Y02E60/10Y02P70/50
Inventor 韩磊周先凯姚佳涂佩
Owner SHANGHAI BYD
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