LITHIUM ION SECONDARY BATTERY COMPONENT AND MANUFACTURING METHOD THEREFOR, AND LITHIUM ION SECONDARY BATTERY

An electrode assembly for a lithium-ion secondary battery and a preparation method thereof, and a lithium-ion secondary battery are disclosed. The electrode assembly comprises an electrode and an electrode post, where an electrode tab is extended from the electrode; a welding connection portion is f...

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Hauptverfasser: PAN, Yi, TANG, Fulan, LIANG, Guihai, YUAN, Wansong
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Sprache:eng ; fre ; ger
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creator PAN, Yi
TANG, Fulan
LIANG, Guihai
YUAN, Wansong
description An electrode assembly for a lithium-ion secondary battery and a preparation method thereof, and a lithium-ion secondary battery are disclosed. The electrode assembly comprises an electrode and an electrode post, where an electrode tab is extended from the electrode; a welding connection portion is formed by welding between the electrode tab and the electrode post; the welding connection portion has a bulge welding defect; the surface of the welding connection portion is covered with a polymer protective layer, and the thickness of the polymer protective layer is greater than or equal to the thickness of the bulge welding defect; and the bulge welding defect is embedded in the polymer protective layer.
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subjects BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
title LITHIUM ION SECONDARY BATTERY COMPONENT AND MANUFACTURING METHOD THEREFOR, AND LITHIUM ION SECONDARY BATTERY
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