Cylindrical multi-lug lithium ion battery and preparation method thereof

A lithium-ion battery, multi-pole technology, which is applied in the manufacture of electrolyte batteries, secondary batteries, battery pack components, etc., can solve problems such as poor consistency and small design capacity, and achieve cost reduction, increase design capacity, and simple operation. Effect

Inactive Publication Date: 2014-01-08
ZHEJIANG JINKAILAI NEW ENERGY TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0011] The present invention aims to provide a cylindrical multi-tab lithium-ion battery and its preparation method to solve the technical problems of small design capacity and poor consistency existing in the existing lithium-ion battery structure

Method used

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  • Cylindrical multi-lug lithium ion battery and preparation method thereof
  • Cylindrical multi-lug lithium ion battery and preparation method thereof
  • Cylindrical multi-lug lithium ion battery and preparation method thereof

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Embodiment Construction

[0028] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0029] In order to solve the problems of complex process and poor consistency of battery performance caused by setting collector rings in the prior art, the present invention provides a cylindrical multi-tab lithium-ion battery, such as figure 2 and image 3 As shown, the lithium-ion battery includes: a cylindrical case 10 , a positive electrode cover plate 20 and a negative electrode cover plate 30 , a cell wound body 40 and an electrolyte filled inside the cylindrical case 10 . Wherein the negative electrode cover plate 30 has a protruding platform 31 extending to the inside of the cylindrical casing 10; the battery winding body 40 is arranged in the cylindrical casing 10, and the battery w...

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Abstract

The invention discloses a cylindrical multi-lug lithium ion battery and a preparation method thereof. The lithium ion battery comprises a cylindrical housing, a positive-electrode cover plate, a negative-electrode cover plate, a battery core wound body, and electrolyte. A protruding platform extending into the inner part of the cylindrical housing is provided on the negative-electrode cover plate. The battery core wound body is prepared by winding by using a positive-electrode sheet, a separation sheet, and a negative-electrode sheet. A plurality of lugs are arranged on the positive-electrode sheet and the negative-electrode sheet. The electrolyte is filled in the cylindrical housing. The plurality of lugs on the negative-electrode sheet extend to the center of the battery core wound body and are connected on the protruding platform. With the design structure, the plurality of lugs on the negative-electrode sheet are directly arranged on the protruding platform through a welding point, such that battery performance consistency and manufacturing yield are improved, internal space of the battery is saved, battery design capacity is improved, and cost is reduced. With the preparation process, no large-scale instrument and equipment is needed, and operation is simple. The method is suitable for automation transformation of production lines.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a cylindrical multi-tab lithium ion battery and a preparation method thereof. Background technique [0002] Lithium-ion batteries, especially lithium-ion batteries using lithium iron phosphate as the positive electrode active material, have the advantages of high specific power, long cycle life, good safety performance, and no pollution. They are the key to the rapid development of electric vehicles and hybrid electric vehicles. product. Among a series of lithium-ion battery products, batteries with cylindrical aluminum alloy casing have attracted much attention. Its special shape and material make the product's shape and size highly stable, with better high-current discharge performance, higher safety performance, and significantly improved casing anti-corrosion performance. . [0003] At present, there are many kinds of manufacturing processes for batteries with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M2/26H01M10/058H01M50/536H01M50/538
CPCY02E60/122H01M10/0525H01M10/058H01M50/531H01M50/543Y02E60/10Y02P70/50
Inventor 张玉花张文魁梁文明叶张军吴志川李勇张兢
Owner ZHEJIANG JINKAILAI NEW ENERGY TECH
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