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A battery cell film bag packaging method, battery preparation method and battery

A technology for batteries and batteries, which is applied in the battery film bag packaging method and the field of battery preparation. It can solve the problems of prone to false welding, increase the difficulty of welding, and reduce the thickness of the battery, so as to simplify the packaging process, reduce the overall thickness, The effect of reducing the overall thickness

Active Publication Date: 2020-11-24
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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  • A battery cell film bag packaging method, battery preparation method and battery
  • A battery cell film bag packaging method, battery preparation method and battery
  • A battery cell film bag packaging method, battery preparation method and battery

Examples

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Embodiment 1

[0050] figure 1 The flowchart 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] like 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 both...

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 specifically discloses a cell film bag packaging method, a battery preparation method and a battery, wherein the cell bag packaging method includes the following steps: preparing two metal films of a positive electrode metal film and a negative electrode metal film; The conductive part exposing the metal material layer is arranged on the insulating heat-sealing layer of the metal film, and the tab part exposing the metal material layer is arranged on the insulating heat-sealing layer or the insulating protective layer of the metal film; at least one side of the two metal films Heat sealing to form a packaging film bag; place the cell without tabs in the packaging film bag, and make the metal material layer at the conductive part of the positive metal film contact with the positive current collector of the cell, and the conductive part of the negative metal film The metal material layer is in contact with the negative electrode current collector; the unclosed side of the packaging film bag is heat-sealed and a liquid injection port is reserved. The battery film bag packaging method, battery preparation method and battery disclosed by the invention can improve the quality of battery 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 Patents(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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