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Laminated lithium ion battery core and assembly method thereof and laminated lithium ion battery comprising same

A lithium-ion battery and assembly method technology, which is applied to secondary batteries, circuits, electrical components, etc., can solve the problems of hidden safety hazards in the use process, complicated preparation methods, and high costs, and achieve prolonging service life, simple operation, and avoiding waste. Effect

Inactive Publication Date: 2018-07-06
福建荣华科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The first object of the present invention is to provide a method for assembling laminated lithium-ion battery cores, so as to alleviate the complex preparation method of laminated lithium-ion battery cores in the prior art, high efficiency and low cost, and problems during use. Technical issues with potential safety hazards

Method used

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  • Laminated lithium ion battery core and assembly method thereof and laminated lithium ion battery comprising same

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Effect test

Embodiment 1

[0047] This embodiment provides a laminated lithium-ion battery, and the preparation method of the laminated lithium-ion battery includes the following steps:

[0048] (a), providing 3 gap-coated positive electrode strips and 3 gap-coated negative electrode strips of the same specification, and arranging the positive electrode strips and the negative electrode strips at intervals.

[0049] (b), the separator strip is laid on the gap-coated positive electrode sheet strip and the gap-coated negative electrode sheet strip provided in step (a), so that the separator strip includes positive electrode sheets and negative electrode sheets arranged at intervals .

[0050] (c) Fix the gap-coated positive electrode sheet strip, the gap-coated negative electrode sheet strip, and the separator strip by heating and rolling.

[0051] (d) Cutting along both sides of the separator strip by a cutting device to obtain positive and negative electrode sheet separators.

[0052] (e) Assembling t...

Embodiment 2

[0055] This embodiment provides a laminated lithium-ion battery, and the preparation method of the laminated lithium-ion battery includes the following steps:

[0056] (a), provide 3 gap-coated positive electrode strips and 3 gap-coated negative electrode strips of the same specification, and arrange the positive electrode strips and the negative electrode strips in parallel on the same plane , to ensure that the distance between the positive electrode strip and the negative electrode strip is not less than 1 / 2 of the thickness of the positive electrode and the negative electrode, and that each positive electrode and each negative electrode are aligned on the same vertical line On the top, the positive pole tab and the negative pole tab are respectively located in opposite directions of the separator strip.

[0057] (b), the separator strip is laid on the gap-coated positive electrode sheet strip and the gap-coated negative electrode sheet strip provided in step (a), so that t...

Embodiment 3

[0064] This embodiment provides a laminated lithium-ion battery, and the preparation method of the laminated lithium-ion battery includes the following steps:

[0065] (a), provide 3 gap-coated positive electrode strips and 3 gap-coated negative electrode strips of the same specification, and arrange the positive electrode strips and the negative electrode strips in parallel on the same plane , to ensure that the distance between the positive electrode strip and the negative electrode strip is not less than 1 / 2 of the thickness of the positive electrode and the negative electrode, and that each positive electrode and each negative electrode are aligned on the same vertical line On the top, the positive pole tab and the negative pole tab are respectively located in opposite directions of the separator strip.

[0066] (b), the separator strip is laid on the gap-coated positive electrode sheet strip and the gap-coated negative electrode sheet strip provided in step (a), so that t...

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Abstract

The invention provides a laminated lithium ion battery core and an assembly method thereof and a laminated lithium ion battery comprising the same, and relates to the technical field of lithium ion batteries. The assembly method of the laminated lithium ion battery core, provided by the invention, comprises the following steps: laying diaphragm strips on the surfaces of spaced gap-coated positiveelectrode strips and negative electrode strips, rolling and cutting to obtain positive and negative electrode diaphragms, and assembling to obtain the laminated lithium ion battery core. By the assembly method, the operation is simple, the production cost is reduced while the production efficiency is improved, the defective rate of the laminated battery core is reduced, the service life of the battery is prolonged, and safety hazards are avoided even during long-term use. The laminated lithium ion battery core provided by the invention is assembled by the assembly method, and has excellent electrochemical performance, long service life and no safety hazards during long-term use. The laminated lithium ion battery provided by the invention comprises the laminated lithium ion battery core, and is worth of popularization and application.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a laminated lithium-ion battery core, an assembly method thereof, and a laminated lithium-ion battery containing the laminated lithium-ion battery core. Background technique [0002] Lithium-ion battery is a secondary battery (rechargeable battery) that mainly relies on the movement of lithium ions between the positive and negative electrodes to work. During the charging and discharging process, Li + Intercalation and deintercalation back and forth between two electrodes: when charged, Li + It is deintercalated from the positive electrode, inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. [0003] Lithium-ion batteries are currently commercialized batteries with the highest specific power and energy density, and have been widely used in modern tools such as no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0587H01M10/0525
CPCH01M10/0525H01M10/0587Y02E60/10Y02P70/50
Inventor 程建聪许家春杨宏
Owner 福建荣华科技有限公司
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