Air extraction method of soft package battery
A soft-pack battery and battery technology, applied in the direction of secondary battery gas removal, secondary battery repair/maintenance, etc., can solve the problems that affect the performance of battery electrical performance, reduce battery manufacturing efficiency, and unqualified battery hardness, and achieve guaranteed hardness. and battery flatness, increase manufacturing cost, and reduce the effect of thickness difference
Active Publication Date: 2018-06-15
河南国能电池有限公司
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Problems solved by technology
[0005] The purpose of the present invention is to provide a method of pumping air for soft-pack batteries, so as to alleviate the poor appearance of the battery after pumping in the prior art, affect the unqualified hardness of the battery after the pumping is completed, affect the performance of the battery's electrical performance, and increase the Manufacturing costs, technical issues that reduce battery manufacturing efficiency
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[0037] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0038] In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear "Etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the pointed device or element must have a specific orientat...
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The invention provides an air extraction method of a soft package battery and relates to the technical field of a manufacturing process of a lithium ion battery. The air extraction method of the softpackage battery comprises the following steps: 1, preparing a battery which is subjected to formation and is going to be subjected to air extraction, and performing primary flat pressing on the formedbattery; 2, performing primary extraction and primary sealing on the battery subjected to primary flat pressing; 3, performing secondary flat pressing on the battery subjected to primary extraction;4, performing secondary extraction and secondary sealing on the battery subjected to secondary flat pressing and entering the next process, wherein primary flat pressing is conducted before air extraction of the battery subjected to formation and a certain external force is applied to the battery, so that pole piece expansion in the air extraction process of positive and negative pole pieces can be reduced, and the technical problems in the prior art that the appearance of the battery is bad after air extraction, the hardness of the battery is unqualified after air extraction, exertion of theelectric property of the battery is influenced, the manufacturing cost is increased and the manufacturing efficiency of the battery is reduced are relieved; gas and residual electrolyte in the batterycore can be removed maximally, and battery hardness and battery flatness can be guaranteed maximally.
Description
Technical field [0001] The present invention relates to the technical field of lithium ion battery manufacturing technology, in particular to a method for pumping air for a soft pack battery. Background technique [0002] Lithium-ion battery (later referred to as lithium battery) has the advantages of high voltage, high energy density, high safety, low self-discharge rate, etc., and is a promising new energy; with the further development of science and technology, energy problems With the increasing environmental problems, people’s requirements for lithium batteries are getting higher and higher; in the application fields of electric vehicles, solar energy storage batteries, energy storage power stations, smart phones, laptop computers, etc., lithium batteries are required to have high capacity and high With high rate, high stability, high safety and high consistency, the air extraction process of the soft-packed liquid lithium-ion battery is the final packaging step of battery m...
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IPC IPC(8): H01M10/52
CPCH01M10/52Y02E60/10
Inventor 赵盼盼田英鸽刘玉良
Owner 河南国能电池有限公司