Lithium battery leading-out electrode with high charge-discharge rate

Abstract

The invention discloses a lithium battery leading-out electrode with high charge-discharge rate. A positive current collector and a negative current collector are arranged in a staggered way, a protruding end of the positive current collector is arranged at one side of a lithium battery, a protruding end of the negative current collector is arranged at the other side of the lithium battery, the lithium battery leading-out electrode is characterized in that a positive gold spraying layer is deposited at the protruding end of the positive current collector and is electrically connected with thepositive current collector, and a negative gold spraying layer is deposited at the protruding end of the negative current collector and is electrically connected with the negative current collector. The gold spraying layers have certain thicknesses, subsequent welding is facilitated, the problem that a thin film current collector electrode is difficult to lead out is solved, current loading can beimproved, the internal resistance is reduced, and the charge-discharge rate is improved; and the positive gold spraying layer and the negative gold spraying layer are respectively arranged at different sides of the lithium battery, so that electrodes are lead out from different sides of the lithium battery, the problem that a positive electrode and a negative electrode are connected to cause short circuit due to a traditional mode that a tab is lead out from a signal side is prevented, no insulation cap is also needed to be additionally arranged, and the structure and the process are simplified.

Description

technical field [0001] The invention relates to a lead-out electrode of a lithium battery with a high charging and discharging rate. Background technique [0002] Lithium battery is a green and environmentally friendly battery that does not produce any toxic and harmful heavy metal elements such as lead, mercury, and cadmium, so it has been more and more widely used. Common lithium batteries have cylindrical and square shapes. The interior of the battery adopts a spiral wound structure, and a very fine and highly permeable polyethylene film separator is used to separate the positive and negative electrodes; the positive electrode includes lithium cobalt oxide. (or nickel cobalt lithium manganate, lithium manganate, lithium iron phosphate, etc.) and aluminum foil current collector; the negative electrode is composed of graphitized carbon material and copper foil current collector, and the battery is filled with organic electrolyte solution. Aluminum and copper foils can also...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a lithium battery lead-out electrode with a high charge-discharge rate, which can solve the problem of difficult lead-out electrodes of thin-film current collectors, effectively reduce the internal resistance of the battery, increase the charge-discharge rate, and has a simple structure and low cost

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