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Electrode plate and application thereof

A technology of electrode sheets and tabs, which is applied in the direction of battery electrodes, electrode carriers/collectors, non-aqueous electrolyte battery electrodes, etc., can solve problems such as inability to conduct current collectors, improve rate charge and discharge performance, reduce welding resistance, The effect of increasing mass energy density

Pending Publication Date: 2021-08-20
ZHUHAI COSMX BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since the polymer material in the current collector of this structure is not conductive, when the tab is welded on one side of the current collector, the other side of the current collector cannot be conducted. side, so new welding methods need to be developed

Method used

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  • Electrode plate and application thereof
  • Electrode plate and application thereof
  • Electrode plate and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] The lithium-ion battery of the present embodiment is obtained through the following steps:

[0103] 1) Preparation of positive electrode sheet

[0104] The positive current collector is a current collector with Al-PET-Al structure, such as Figure 9 and Figure 10 As shown, the positive electrode current collector includes the first tab region 3 and the first active layer region 2 in the length direction, the second tab region 6 is arranged corresponding to the first tab region 3, and the second active layer region 9 is connected to the first tab region. An active layer area 2 is provided correspondingly, and the first tab area 3 is provided with a through hole 4 penetrating to the second tab area 6, and the shape of the through hole 4 is elliptical;

[0105] Apply the lithium cobaltate active slurry on the first active layer area 2 and the second active layer area 9, paste the protective adhesive tape on the first tab area 3 and the second tab area 6, and then place ...

Embodiment 2

[0113] The lithium-ion battery of the present embodiment is obtained through the following steps:

[0114] 1) Preparation of positive electrode sheet

[0115] The positive current collector is Al-Al 2 o 3 -PET-Al 2 o 3 -Current collector of Al structure, such as Image 6 and Figure 8 As shown, the positive current collector includes a first tab region 3 and a first active layer region 2 in the width direction, and the three sides of the first tab region 3 are adjacent to the first active layer region 2; the second tab region 6 is set corresponding to the first tab area 3, the second active layer area 9 is set corresponding to the first active layer area 2, the first tab area 3 is provided with a through hole 4 penetrating to the second tab area 6, and the through hole 4 is oval in shape;

[0116] The lithium cobaltate active slurry is coated on the first active layer region 2 and the second active layer region 9, wherein the mass composition of the lithium cobaltate ac...

Embodiment 3

[0124] The lithium-ion battery of the present embodiment is obtained through the following steps:

[0125] 1) Preparation of positive electrode sheet

[0126] The positive current collector is a current collector with Al-PP-Al structure, such as Figure 7 with Figure 8 As shown, the positive electrode current collector includes a first tab area 3 and a first active layer area 2 in the width direction, and one side of the first tab area 3 is adjacent to the first active layer area 2; the second tab area 6 is set corresponding to the first tab area 3, the second active layer area 9 is set corresponding to the first active layer area 2, the first tab area 3 is provided with a through hole 4 penetrating to the second tab area 6, and the through hole 4 is oval in shape;

[0127] The lithium cobaltate active slurry is coated on the first active layer region 2 and the second active layer region 9; wherein, the mass composition of the lithium cobaltate active slurry is lithium cob...

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Abstract

The invention provides an electrode plate and an application thereof. A first functional surface of a current collector in the electrode plate comprises a first active layer area and a first tab area, and a second functional surface of the current collector comprises a second active layer area opposite to the first active layer area and a second tab area opposite to the first tab area. The active layer is arranged in the first active layer area and / or the second active layer area; n through holes penetrating to the second tab area are formed in the first tab area, a T-shaped tab passes through the through holes, one end of a first section of the T-shaped tab is connected with the first tab area to form a first connecting area, and the other end of the first section of the T-shaped tab is connected with the first tab area to form a second connecting area; the second section of the T-shaped tab is connected with the second tab area to form a third connecting area, and N is greater than or equal to 1; and the current collector comprises a first conductive layer, an insulating layer and a second conductive layer which are stacked. The lithium ion battery prepared from the electrode plate has relatively high mass energy density and safety performance.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to an electrode sheet and its application. Background technique [0002] Since Sony released the first commercial lithium-ion battery in 1991, lithium-ion batteries have been widely used in consumer electronics, electric vehicles, and energy storage. [0003] Existing lithium-ion batteries usually use aluminum foil as the positive electrode collector, and copper foil as the negative electrode collector. In order to increase the energy density of lithium-ion batteries, aluminum foil or copper foil can be combined with lighter polymer materials to form new current collectors, such as aluminum-polymer-aluminum current collectors, copper-polymer-copper current collectors. This new current collector with a sandwich structure not only has a lower surface density, can reduce the weight of the lithium-ion battery and increase the energy density, but also when the battery is short-circuit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/13H01M50/533H01M50/536H01M50/538H01M50/581H01M4/66H01M10/0525H01M10/0587
CPCH01M4/13H01M4/667H01M10/0525H01M10/0587Y02P70/50Y02E60/10
Inventor 翟艳云张健彭冲
Owner ZHUHAI COSMX BATTERY CO LTD
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