Intelligent IC card, ultrathin battery and pole piece with tab of ultrathin battery

Abstract

The invention discloses an intelligent IC card, an ultrathin battery and a pole piece with a tab of the ultrathin battery. The pole piece comprises a current collector piece, wherein the current collector piece is provided with connected dressing area and blank area; an integrally connected tab area extends on local edge of the blank area; and the tab area and the dressing area are located at two sides of the blank area. Due to the adoption of the tab which is integrally connected with the current collector piece, the welding mode of superposing a tab piece on the current collector piece is creatively avoided, the thickness of the pole piece is obviously reduced, the bottleneck that a polymer ultrathin soft package secondary battery cannot be easily improved towards a smaller thickness direction is broken through, and the pole piece has important practical value and significance in popularization and development of the intelligent IC card with the battery.

Description

technical field [0001] The invention relates to the field of smart IC cards with batteries, in particular to a pole piece used in an ultra-thin battery. Background technique [0002] With the intelligent development of society, all kinds of magnetic stripe cards are also shifting towards chip cards, especially bank cards, which are currently being replaced from magnetic stripe cards to chip cards on a large scale. , in the near future, various chip-based bank cards, ID cards (ID cards), social security cards, and provident fund cards will also develop into smart IC cards with batteries. higher requirements. [0003] However, polymer ultra-thin soft-packaged secondary batteries in the prior art, such as lithium-ion batteries, are limited by their internal structures and have a thickness of more than 1mm. Especially, the positive and negative electrodes often need to be welded to the corresponding electrodes Ear, which limits the bottleneck of the polymer ultra-thin flexible...

AI Technical Summary

Problems solved by technology

[0003] However, polymer ultra-thin soft-packaged secondary batteries in the prior art, such as lithium-ion batteries, are limited by their internal structures and have a thickness of more than 1mm. Especially, the positive and negative electrodes often need to be welded to the corresponding electrodes ear, which limits the bottleneck of the polymer ultra-thin flexible packaging secondary battery and is difficult to improve towards a thinner direction.

[0004] Therefore, the existing technology still needs to be improved and developed

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