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Lithium ion battery lead ultrasonic welding method and lead welding protection method

A technology of ultrasonic welding and lithium-ion batteries, applied in welding equipment, non-electric welding equipment, metal processing, etc., can solve the problem that the surface of tab foil is easily broken or cracked by vibration, and achieve high consistency, firm welding, The effect of the enhanced effect

Active Publication Date: 2018-02-09
CHINA AVIATION LITHIUM BATTERY LUOYANG
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Problems solved by technology

[0004] The purpose of the present invention is to provide a lithium-ion battery tab ultrasonic welding method to solve the technical problem that the surface of the tab foil is easily broken or cracked during the ultrasonic welding process; the purpose of the present invention is also to provide a lithium-ion battery. Ion battery tab welding protection method

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  • Lithium ion battery lead ultrasonic welding method and lead welding protection method
  • Lithium ion battery lead ultrasonic welding method and lead welding protection method
  • Lithium ion battery lead ultrasonic welding method and lead welding protection method

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Embodiment Construction

[0025] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0026] A specific embodiment of the lithium ion battery tab ultrasonic welding method of the present invention comprises the following steps: the first step, such as figure 1 As shown, the pole piece foil 21 and the tab foil 11 with a thickness of about 0.01mm are superimposed together, the pole piece foil 21 and the tab foil 11 are integrated, and the tab foil 11 is the part of the pole piece 2. For the current lead-out parts, when the pole piece foil 21 and the tab foil 11 are superimposed, ensure that they are aligned up, down, left, and right, and the edges are neat. The adjacent pole piece foils 21 are coated with lithium iron phosphate or ternary, Coatings of graphite, etc.; second step, such as figure 2 As shown, the 0.1mm thick copper foil or aluminum foil is wrapped on the stacked tab foil 11 to form a soldering protection sheet 3. The solderi...

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Abstract

The invention relates to a lithium ion battery lead ultrasonic welding method and a lead welding protection method. A protection piece is arranged on an overlaid lead foil piece ultrasonic welding area, and a welding head of an ultrasonic welding device is pressed on the protection piece for ultrasonic welding. The protection piece is arranged on overlaid lead foil pieces, and the protection piecemakes direct contact with the welding head so as to bear ultrasonic vibration of the welding head and transmit vibration to the lead foil pieces; through arrangement of the protection piece, the leadfoil pieces can be prevented from being broken under vibration; through arrangement of the protection piece, the ultrasonic welding parameters such as energy, pressure and vibration amplitude can beadjusted to be slightly high correspondingly, so that the welding effect is improved and welding is firmer, and the effect on batteries with few lead foil piece layers is particularly obvious; and through arrangement of the protection piece, the surfaces of leads are free of damage, and the consistency of the welding effect is high.

Description

technical field [0001] The invention relates to an ultrasonic welding method for tabs of a lithium ion battery and a welding protection method for tabs. Background technique [0002] During the production process of the lithium-ion battery cell, the cell is composed of multiple layers of cell pole pieces, and each layer of cell foil protrudes from a layer of tab foil. After the cell foils are aligned, the tab foil Also fit and align together, it is necessary to weld the battery foils together to form the battery core, and weld the tab foils together to form the tabs, because the tab foils are very thin, only about 0.01mm, so the traditional general Through ultrasonic welding, the bottom mold is placed on the lower part of the superimposed tab foil as a support during welding, and the welding head of the ultrasonic welding device is pressed on the stacked tab foil and a certain amount of pressure is applied to the tab foil through the welding head. pressure, and then start t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/10B23K20/26
CPCB23K20/10B23K20/26B23K2101/36
Inventor 郭扭徐志强郑治华杨驰张世强衡海龙马兴瑞
Owner CHINA AVIATION LITHIUM BATTERY LUOYANG
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