Air extraction method for pouch 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 of affecting battery electrical performance, reducing battery manufacturing efficiency, battery hardness unqualified, etc., to ensure hardness And battery flatness, increase manufacturing cost, reduce the effect of thickness difference
Active Publication Date: 2020-11-24
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. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to 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 indicated orientation or positional relationship 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, rather than indicating or implying that the referred device or element must have a specif...
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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 invention relates to the technical field of lithium-ion battery manufacturing technology, in particular to a gas extraction method 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 source; with the further development of science and technology, energy issues With the increasingly prominent and environmental problems, people have higher and higher requirements for lithium batteries; 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, high High rate, high stability, high safety and high consistency, the pumping process of soft pack liquid lithium ion battery is the final packaging step of battery forming. [0...
Claims
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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