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Lithium battery and preparation method thereof

A technology for lithium batteries and battery slices, which is used in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, and final product manufacturing, etc., can solve the problems of difficult to control the thickness of wound lithium batteries, high cost of slicing, and large space, and avoid powder The effect of raw material falling off, high space utilization rate and high energy density

Inactive Publication Date: 2019-07-30
四川福来威新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the thickness of the wound lithium battery is difficult to control, and the sides of the wound lithium battery are rounded, which will waste a lot of space when placing the lithium battery in electronic products
The positive plate and negative plate of the laminated lithium battery must be sliced, and the cost of slicing is high

Method used

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  • Lithium battery and preparation method thereof
  • Lithium battery and preparation method thereof
  • Lithium battery and preparation method thereof

Examples

Experimental program
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Embodiment

[0030] The preparation method of lithium battery comprises the steps:

[0031] (1), prepare the first polar plate and the second polar plate:

[0032] Wherein, in this embodiment, the first pole plate is a negative pole plate, and the second pole plate is a positive pole plate. In other embodiments, the first pole plate is a positive pole plate, and the second pole plate is a negative pole plate. The following description will be made by taking the first pole plate as a negative pole plate and the second pole plate as a positive pole plate as an example.

[0033] In this embodiment, the preparation method of the positive electrode plate is as follows:

[0034] Prepare the positive electrode slurry first. 90-98% positive active material, 0.5-5% conductive carbon black, 0.5-5% PDVF (Poly (vinylidene fluoride), polyvinylidene fluoride) and 0.5-5% NMP (N-methyl-2 -pyrrolidone, N-methylpyrrolidone) are uniformly mixed to make positive electrode slurry with a solid content of 30...

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Abstract

The invention provides a lithium battery and a preparation method thereof, and belongs to the battery technology field. The lithium battery comprises a first pole plate, a second pole plate, and a diaphragm. The first pole plate is configured to be bent for multiple times to form a plurality of first pole pieces, which are overlapped sequentially, and an inserting groove is formed between every two adjacent first pole pieces, and a plurality of inserting grooves are formed by the plurality of first pole pieces. The second pole plate comprises a plurality of second pole pieces, which are independent of each other, and one second pole piece is disposed in one inserting groove. Each diaphragm is disposed between the corresponding first pole piece and the corresponding second pole piece. The preparation method of the lithium battery comprises following steps that: the first pole plate is bent for multiple times to form a plurality of first pole pieces, which are overlapped sequentially, sothat the inserting groove is formed between the two adjacent first pole pieces, and a plurality of inserting grooves are formed by the plurality of first pole pieces; and a plurality of second pole pieces are inserted into the plurality of inserting grooves, and one second pole piece is inserted into one inserting groove. The lithium battery prepared by the preparation method has advantages of high space utilization rate and simpler preparation.

Description

technical field [0001] The present application relates to the technical field of lithium batteries, in particular, to a lithium battery and a preparation method thereof. Background technique [0002] Traditional lithium-ion lithium batteries include wound lithium batteries and stacked lithium batteries. Among them, the thickness of the wound lithium battery is difficult to control, and the sides of the wound lithium battery are rounded, which will waste a lot of space when the lithium battery is placed in an electronic product. The positive plate and the negative plate of the laminated lithium battery must be sliced, and the cost of slicing is high. Contents of the invention [0003] The purpose of the present application is to provide a lithium battery and a preparation method thereof, which have high space utilization and are simpler to manufacture. [0004] In a first aspect, an embodiment of the present application provides a lithium battery, including a first pole p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058
CPCH01M10/058Y02E60/10Y02P70/50
Inventor 程君
Owner 四川福来威新能源科技有限公司
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