Electrode plate, electrochemical device and electronic equipment

An electrode pole piece and tab technology, which is applied to electrochemical generators, non-aqueous electrolyte battery electrodes, circuits, etc., can solve the problem of large thickness of the tab connecting piece, low utilization rate of the internal space of the lithium ion battery, and easy bending. Problems such as breakage occur, to reduce charging time, improve space utilization, and be less prone to breakage

Pending Publication Date: 2022-05-13
DONGGUAN POWERAMP TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the thickness of the tab connection piece after bending is too large, resulting in a low utilization rate of the internal space of the lithium-ion battery, and the bend is more prone to breakage

Method used

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  • Electrode plate, electrochemical device and electronic equipment
  • Electrode plate, electrochemical device and electronic equipment
  • Electrode plate, electrochemical device and electronic equipment

Examples

Experimental program
Comparison scheme
Effect test

experiment example 11

[0076] In this experimental example 1.1, the electrode pole piece has a total of 20 tab connection pieces (aluminum foil with a thickness of 10 μm, including 10 first tab connection pieces and 10 second tab connection pieces). The projections of the 10 first lug connecting pieces on the polymer layer and the projections of the 10 second lug connecting pieces on the polymer layer are equidistantly distributed (the equidistant distance is 10mm), and the first conductive layer has 5 groups A set of lug connecting pieces (2 first lug connecting pieces in each group), a total of 5 sets of second lug connecting pieces in the second conductive layer (2 second lug connecting pieces in each group), 5 first The projections of the tab connecting sheet group on the polymer layer and the projections of the five second tab connecting sheet groups on the polymer layer are alternately distributed. The electrode pads in Experimental Example 1.1 can refer to figure 1 The schematic structure o...

experiment example 12

[0081] In this experimental example 1.2, the electrode pole piece has a total of 20 tab connection pieces (aluminum foil with a thickness of 10 μm, including 10 first tab connection pieces and 10 second tab connection pieces). The projections of the 10 first lug connecting pieces on the polymer layer and the projections of the 10 second lug connecting pieces on the polymer layer are equidistantly distributed (the equidistant distance is 10mm), and there are 10 groups of the first conductive layer. One lug connecting sheet group (1 first lug connecting piece per group), 10 sets of second tab connecting piece groups (1 second lug connecting piece per group), 1 first The projection of the tab connecting sheet group on the polymer layer and the projection of a second tab connecting sheet group on the polymer layer are alternately distributed. The electrode pads in Experimental Example 1.2 can refer to Figure 5 The schematic structure of the electrode pad 100 is understood.

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experiment example 13

[0086] In this experimental example 1.3, the electrode pole piece has a total of 20 tab connection pieces (aluminum foil with a thickness of 10 μm, including 10 first tab connection pieces and 10 second tab connection pieces). The projections of the 10 first lug connecting pieces on the polymer layer are equidistantly distributed with the 10 second lug connecting pieces (the equidistant distance is 10mm), and the first conductive layer has 4 sets of first lug connecting piece groups ( 3 first lug connecting pieces in each group), 4 sets of second lug connecting pieces in total in the second conductive layer (2 second lug connecting pieces in each group), 4 first lug connecting piece groups are aggregated The projections on the object layer and the projections of the four second lug connecting sheet groups on the polymer layer are alternately distributed. The electrode pads in Experimental Example 1.3 can refer to Figure 6 The schematic structure of the electrode pad 100 is ...

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Abstract

The embodiment of the invention provides an electrode pole piece, an electrochemical device and electronic equipment, the electrode pole piece comprises a current collector, m first tab connecting piece groups and n second tab connecting piece groups, m and n are integers greater than or equal to 1, and each first tab connecting piece group comprises at least one first tab connecting piece, each second tab connecting sheet group comprises at least one second tab connecting sheet; the current collector comprises a first conductive layer, a second conductive layer and a polymer layer, and the polymer layer is arranged between the first conductive layer and the second conductive layer; the first tab connecting sheets in the m first tab connecting sheet groups are connected to the first conductive layer, the second tab connecting sheets in the n second tab connecting sheet groups are connected to the second conductive layer, and the projection of any first tab connecting sheet on the polymer layer is not overlapped with the projection of any second tab connecting sheet on the polymer layer.

Description

technical field [0001] Embodiments of the present disclosure relate to the battery field, and in particular to an electrode sheet, an electrochemical device, and an electronic device. Background technique [0002] With the continuous development of the new energy industry, lithium-ion batteries are increasingly used in electronic products, which have significant advantages such as high energy density, low cycle capacity attenuation, low self-discharge rate, and small size. In some lithium-ion batteries, it is made by winding the electrode pole piece. The electrode pole piece generally includes a current collector, which can use a polymer as a supporting layer, and set a conductive layer on both sides of the polymer to conduct electricity. The tab connection piece for connecting with the tab is connected on the conductive layer. A way to lead out the tabs of a lithium-ion battery from the electrode tabs is to bend the tabs connected to the corresponding positions on the two ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/13H01M50/531H01M10/0525
CPCH01M4/13H01M50/531H01M10/0525
Inventor 史骁张浩汪颖
Owner DONGGUAN POWERAMP TECH LTD
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