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A lithium supplemental method of soft-clad lithium ion battery, a preparation method of lithium ion battery, and an intermediate lithium supplemental battery

A lithium-ion battery and ion battery technology, applied in the field of lithium-ion batteries, can solve the problems of resource waste, heavy battery weight, low energy density, etc., and achieve the effects of avoiding waste, high energy density, and improving utilization rate

Active Publication Date: 2018-12-14
SOUNDON NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The first object of the present invention is to provide a method for replenishing lithium in a soft-packed lithium-ion battery, so as to alleviate the technical problems of heavy battery weight, low energy density and waste of resources caused by the lithium replenishment method in the prior art

Method used

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  • A lithium supplemental method of soft-clad lithium ion battery, a preparation method of lithium ion battery, and an intermediate lithium supplemental battery
  • A lithium supplemental method of soft-clad lithium ion battery, a preparation method of lithium ion battery, and an intermediate lithium supplemental battery

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Embodiment

[0047] as attached figure 1 As shown, the present embodiment is an intermediate supplementary lithium battery for a lithium ion battery, including a battery cell and an aluminum-plastic film for packaging the battery cell. The battery cell includes a positive electrode 1 and a negative electrode 2. After encapsulation, an air bag 4 is formed on one side edge of the aluminum-plastic film, and the metal lithium used as the lithium-replenishing electrode 3 is sealed in the air bag 4 . Wherein, the outer tab of the lithium-supplementing electrode 3 is an aluminum sheet.

[0048] After the liquid injection is completed, the lithium-supplementing electrode 3 is placed in the air bag 4, and an external circuit is led through the aluminum foil. Next, the negative electrode 2 and the lithium-replenishing electrode 3 are respectively connected to an external circuit, and the battery is discharged. During the discharge process, a part of lithium in the lithium supplementary electrode 3...

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Abstract

A lithium supplemental method for soft-clad lithium ion battery, preparation method for lithium ion battery and intermediate lithium supplemental battery relate to that field of lithium ion battery. A) place that lithium supplement electrode in an air bag containing an electrolyte for after the battery core is encapsulated before the lithium supplement method of the soft-clad lithium ion battery is formed; B) electrically connecting the negative electrode of the battery cell and the lithium supplement electrode, and discharging the lithium supplement electrode to migrate the lithium in the lithium supplement electrode to the negative electrode, thereby realizing lithium supplement; C) then cut and removing that air bag and the lithium supplemental electrode. The lithium supplemental methodcan alleviate the technical problem of large battery weight, low energy density and iste of resources caused by the prior art lithium supplemental method, and achieves the technical effect of improvethe energy density of the battery.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a lithium-replenishing method for a soft-pack lithium-ion battery, a preparation method for the lithium-ion battery, and an intermediate lithium-replenishing battery. Background technique [0002] Lithium-ion batteries are mainly composed of positive electrode materials, negative electrode materials, electrolyte, separator and other auxiliary materials. The specific capacity of positive and negative electrode materials directly determines the energy density of the battery. The theoretical specific capacity of graphite as the anode material of lithium-ion batteries is 372mAh / g, and the currently applicable commercial graphite has exceeded 360mAh / g, which is very close to its theoretical value, and there is no obvious room for improvement. To further increase the energy density of batteries, new anode materials must be used. Li can be formed when silicon is alloyed w...

Claims

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Application Information

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IPC IPC(8): H01M10/44H01M10/42H01M10/0525H01M10/058
CPCH01M10/0525H01M10/058H01M10/42H01M10/44Y02E60/10Y02P70/50
Inventor 唐其伟苗力孝朱坤磊徐艳红
Owner SOUNDON NEW ENERGY TECH CO LTD
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