Cell-film bag package method, battery preparation method and battery

A packaging method and cell technology, which is applied in the direction of battery, electrode manufacturing, secondary battery, etc., can solve the problems of increasing the difficulty of welding, reducing the thickness of the battery, and prone to false welding, so as to reduce the overall thickness and reduce the overall Thickness, the effect of simplifying the packaging process

Active Publication Date: 2019-01-25
EVE ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the battery cell and the positive electrode conductive packaging film and the battery cell and the negative electrode conductive packaging film are connected by welding, and are welded in the film bag packaging of the battery cell, the difficulty of welding is increased, the process complexity is increased, and false welding is prone to occur , poor welding and other issues, which lead to unreliable connection between the battery core and the positive conductive packaging film and the battery core and the negative conductive packaging film, which is not conducive to the long-term stable operation of the battery; and because the battery core and the conductive packaging film are welded and connected , leading to an increase in the thickness between the cell and the conductive packaging film, which is not conducive to further reduction in battery thickness

Method used

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  • Cell-film bag package method, battery preparation method and battery
  • Cell-film bag package method, battery preparation method and battery
  • Cell-film bag package method, battery preparation method and battery

Examples

Experimental program
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Effect test

Embodiment 1

[0050] figure 1 The flow chart of the battery preparation method provided by the embodiment of the present invention, such as figure 1 As shown, this embodiment provides a method for preparing a battery to improve the packaging of the battery, simplify the manufacturing process of the battery and reduce the thickness of the battery.

[0051] Such as figure 1 As shown, the battery preparation method provided in this embodiment includes the following steps:

[0052] Step S1 : forming the positive pole piece 11 and the negative pole piece 12 .

[0053] figure 2 The schematic front view of the positive pole piece 11 and the negative pole piece 12 provided for this embodiment, wherein figure 2 Middle a is a schematic diagram of the positive pole piece 11, figure 2 Middle b is a schematic diagram of the negative pole piece 12, such as figure 2 As shown in figure (a), the positive electrode sheet 11 provided in this embodiment is formed by coating positive electrode paint on ...

Embodiment 2

[0111] Figure 7 The flowchart of the battery preparation method provided by the embodiment of the present invention, such as Figure 7 As shown, this embodiment provides a battery preparation method. Compared with Embodiment 1, the preparation method provided by this Embodiment 2 except for the forming method of the positive pole piece and the negative pole piece in step S1 and the shape of the battery cell in step S2 Except for the different molding methods, other steps are the same as those in the first embodiment, and the same steps as those in the first embodiment will not be repeated in this embodiment.

[0112] Figure 8 Schematic diagram of the structure of the cell provided in this embodiment, such as Figure 8 As shown, the cell provided in this embodiment is formed by stacking positive pole pieces, negative pole pieces and separators. The forming process of the positive pole piece, the negative pole piece and the battery cell is as follows.

[0113] Step S1: For...

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Abstract

The invention belongs to the technical field of batteries, and particularly discloses a method for packaging a battery core film bag, a battery preparation method and a battery, wherein the method forpackaging the battery core bag comprises the following steps: preparing two metal films of a positive electrode metal film and a negative electrode metal film; A conductive part exposing the metal material layer is arranged on the insulating heat seal layer of the metal film, and a pole ear part exposing the metal material layer is arranged on the insulating heat seal layer or the insulating protective layer of the metal film; Heat sealing at least one side of the two metal films to form a packaging film bag; Placing a cell having no electrode ears in a packaging film bag, and contacting a metal material layer at an electrically conductive portion of a positive electrode metal film with a positive electrode current collector of the cell, and contacting a metal material layer at an electrically conductive portion of a negative electrode metal film with a negative electrode current collector; Heat seal the unsealed side of the packaging film bag and reserve the filler port. The invention discloses a cell membrane bag packaging method, a battery preparation method and a battery, which can improve the quality of the cell packaging and reduce the overall thickness of the battery.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a battery film bag packaging method, a battery preparation method and a battery. Background technique [0002] With the progress of the times and the rapid development of wearable and portable smart electronic products, ultra-thin secondary lithium batteries have been widely used in wearable and smart card devices. People also put forward more requirements for batteries, hoping to meet the needs of batteries While improving the energy density, the thinner the battery, the better. [0003] The prior art provides a lithium-ion battery without tabs, which includes a positive conductive packaging film, a negative conductive packaging film, and an electric core packaged between the positive conductive packaging film and the negative conductive packaging film, and the positive sheet on the surface of the electric core is provided with Positive electrode blank foil area, the negative...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0583H01M10/0525H01M4/04
CPCH01M4/0404H01M10/0525H01M10/0583H01M2220/30Y02E60/10Y02P70/50
Inventor 徐诚李桂平葛辉明袁中直刘金成
Owner EVE ENERGY CO LTD
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