Solid-state lithium battery packaging structure, lithium battery and packaging method thereof

Abstract

The invention discloses a solid-state lithium battery packaging structure, a lithium battery and a packaging method thereof. The solid-state lithium battery packaging structure comprises a blocking layer, a partitioning layer and a protection layer which are overlapped, wherein the blocking layer is prepared from a lithium-containing compound; the solid-state lithium battery comprises a lithium battery core and the packaging structure; the lithium battery core comprises a cathode structure, a solid electrolyte and an anode structure which are overlapped; the ones of sides, which are used for defining the cathode structure and the anode structure in the lithium battery coreand are far away from the solid electrolyte, of the cathode structure and the anode structure in the lithium battery core are defined as opposite end surfaces; thea surface of the lithium battery core between the two end surfaces is taken as the side surface of the lithium battery core; the packaging structure is arranged on the side surface of the lithium battery core in a surrounding way. According to the packaging method for the solid-state lithium battery, the lithium battery core is provided, the blocking layer, the partitioning layer and the protection layer are arranged on the side surface of the lithium battery core in sequence along a direction far away from from a position closethe lithium battery coreto a position far from the lithium battery core; the blocking layer is prepared from the lithium-containing compound. TAccording to the technical scheme, the solid-state lithium battery packaging structure is characterized by hashaving a dense structure, beingis tightly combined with the battery, and having high performance in protecting and being compatibleprotection on and compatibility with thea lithium alloy.

Description

【Technical field】 [0001] The invention relates to the technical field of solid-state lithium batteries and packaging thereof, in particular to a packaging structure of a solid-state lithium battery, a lithium battery and a packaging method thereof. 【Background technique】 [0002] All-solid-state lithium battery is the next generation lithium battery technology, which has the characteristics of high specific capacity, long cycle life and good safety performance. All-solid-state lithium batteries have broad application prospects in electric vehicles, 3C products and other fields. [0003] Battery packaging is a key step in determining the performance of lithium battery cells. Due to the different material systems and device structures used, the packaging materials and processes of traditional lithium batteries cannot be applied to all-solid-state lithium battery devices. In the existing aluminum-plastic film packaging process, the packaging film is not tightly bonded to the ...

AI Technical Summary

Problems solved by technology

Due to the different material systems and device structures used, the packaging materials and processes of traditional lithium batteries cannot be applied to all-solid-state lithium battery devices.

At present, the existing aluminum-plastic film packaging process has the problem that the packaging film is not tightly combined with the battery body, and there may be air that affects its cycle performance, and some substances in the aluminum-plastic film will react with lithium metal or lithium alloy negative electrodes.

Images