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Preparation method of lithium ion battery and lithium battery thereof

A lithium-ion battery and electrolyte injection technology, applied in battery electrodes, electrolyte battery manufacturing, secondary batteries, etc., can solve problems such as battery fire, battery short circuit, explosion, etc.

Active Publication Date: 2021-07-06
EVE ENERGY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preferential growth of this lithium metal part area will produce dendritic lithium dendrites. During the cycle, the lithium dendrites will continue to grow until they pierce the separator, causing the positive and negative electrodes in the battery to contact and cause a short circuit, which will cause the battery to catch fire or even explode.

Method used

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  • Preparation method of lithium ion battery and lithium battery thereof
  • Preparation method of lithium ion battery and lithium battery thereof

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Embodiment Construction

[0030] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0031] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of ill...

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Abstract

A preparation method of a lithium ion battery and the lithium battery thereof. The preparation method of the lithium ion battery comprises the following steps: coating a positive electrode active material mixture on the A side of the aluminum foil, and coating an insulating layer on the B side of the aluminum foil; electroplating metal lithium On the A side of the copper foil, and the insulating layer is coated on the B side of the copper foil; the separator is arranged between the positive electrode sheet and the negative electrode sheet, and the A surface of the positive electrode sheet is opposite to the B surface of the negative electrode sheet or the negative electrode sheet The A side is arranged opposite to the B side of the positive electrode sheet; the battery pack is wound or a plurality of battery packs are stacked. The preparation method of the lithium ion battery of the present invention can improve the energy density of the battery by arranging a positive electrode sheet of a single-sided active material and a negative electrode sheet using lithium metal as the negative electrode, and at the same time, an insulating layer is arranged on the positive electrode sheet and the negative electrode sheet , so that the generated lithium dendrites can be blocked, thereby preventing the short circuit caused by the contact between the lithium dendrites and the positive electrode sheet.

Description

technical field [0001] The invention relates to the technical field of battery preparation, in particular to a preparation method of a lithium ion battery and a lithium battery thereof. Background technique [0002] Lithium-ion battery is currently the most widely used chemical energy storage device, which has the characteristics of low pollution, high cycle efficiency, flexible adjustment of capacity and energy, fast response and high degree of commercialization. However, low energy density limits its large-scale application in the field of electric mobility. It is difficult for lithium-ion batteries using graphite as the negative electrode to meet the energy density requirements. The development of new high-capacity negative electrodes is an important prerequisite for the next generation of lithium-ion batteries. Compared with the currently widely used graphite anode, the lithium metal anode can provide more capacity (3860mAh / g) and more negative potential, so lithium-sulf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/058H01M10/0583H01M10/0525H01M4/38
CPCH01M4/382H01M10/0525H01M10/058H01M10/0583H01M2004/027Y02E60/10Y02P70/50
Inventor 邱传洲刘荣江洪斯凡林森王理祝媛刘金成
Owner EVE ENERGY CO LTD
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