Novel cylindrical full-tab battery structure and assembling and welding process thereof
A technology of all tabs and batteries, which is applied to battery pack components, small-sized batteries/battery packs, structural parts, etc., can solve problems such as poor control of penetration welding, lower product yield, and battery short circuit, etc., to achieve Good contact, improve product yield, and prevent false soldering
Pending Publication Date: 2022-06-28
FIRST NEW ENERGY GRP CO LTD
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Problems solved by technology
[0003] In order to solve the problem that the existing cylindrical all-tab battery structure welding process needs to adopt penetration welding, which is not easy to control, easily causes battery short circuit or false welding, and reduces the product yield. The present invention provides a new cylindrical all-tab battery structure. The negative terminal cover and the steel shell, the steel shell and the negative electrode collector plate, the positive terminal cover welding plate and the steel shell are all changed to splicing and continuous laser welding, which reduces the difficulty of welding and improves the product yield
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[0033] In the description of the present invention, it should be noted that the terms "center", "portrait", "horizontal", "top", "bottom", "front", "rear", "left", "right", " The orientations or positional relationships indicated by vertical, horizontal, top, bottom, inside, and outside are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying It is described, rather than indicated or implied, that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.
[0034] In the description of the present invention, it should be noted that the terms "installed", "connected" a...
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The novel cylindrical full-tab battery structure comprises a steel shell, a positive pole end cover, a positive pole collector plate, a negative pole end cover, a negative pole collector plate and a roll core, the roll core is arranged in the steel shell, the positive pole end cover is conducted with the positive pole end of the roll core through the positive pole collector plate, the lower end of the steel shell is open, and the negative pole end of the roll core is fixedly connected with the negative pole collector plate. The outer side face of the lower end of the steel shell is sleeved with the negative end cover, the upper end of the negative end cover is fixedly connected with the steel shell, and a liquid injection hole coaxial with a center hole of the roll core is formed in the middle of the negative end cover; and a liquid injection plug is arranged in the liquid injection hole for sealing. By changing the structures of the negative electrode end cover, the negative electrode collector plate and the steel shell, the negative electrode end cover and the steel shell as well as the steel shell and the negative electrode collector plate adopt a splicing continuous laser welding mode, so that the welding difficulty is reduced, pseudo soldering is prevented, and the product yield is improved.
Description
technical field [0001] The invention relates to the technical field of cylindrical lithium batteries, in particular to a novel cylindrical full-tab battery structure and a welding process thereof. Background technique [0002] In the field of lithium batteries, in order to meet the needs of various industries, the requirements for energy density are getting higher and higher, which not only puts forward higher requirements for battery positive and negative electrode materials, separators, electrolytes, etc., but also for the stability of battery structural parts. , Lightweight and safety requirements are also higher. The negative terminal cover and the steel shell, the steel shell and the negative current collecting plate of the existing cylindrical full-tab battery are all welded through penetration, and the penetration welding is not well controlled, which is likely to cause short circuit or false welding of the battery, which reduces the product yield. SUMMARY OF THE IN...
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IPC IPC(8): H01M10/0587H01M50/107H01M50/169H01M10/052H01M50/547H01M50/566H01M50/609B23K26/21B23K26/20
CPCH01M10/0587H01M50/107H01M50/169H01M10/052H01M50/547H01M50/566H01M50/609B23K26/21B23K26/206B23K2101/36Y02P70/50
Inventor 罗兆军相江峰袁军
Owner FIRST NEW ENERGY GRP CO LTD
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