Beijing Welion New Energy Technology Co., Ltd

Chinese Academy of Sciences

Yongwei Li

Wenjun Li

Huigen Yu

Baopeng Hou

Yafei He

Chao Li

Ke Xu

Yu Wang

Jianhua Tao

Jin Xiang

Yunhao Liu

Zepeng Ding

Danrong Li

Disclosed in the invention is a lithium battery production process, which comprises: through sequentially implemented processes of pre-compounding, winding for lamination, cutting, reclaiming material, continuously processing and assembling finished products, each electrode and separator are laminated, processed and formed, and finally assembled into a battery prefabricated product. The lithium battery production process is simple and efficient to implement, and it may realize continuous production of lithium battery products, thereby greatly improving battery production efficiency, and correspondingly simplifying the entire process flow to reduce the labor intensity of the staff. Also disclosed is a lithium battery production equipment for the above lithium battery production process.

Lithium battery production process and equipment

Provided are a gravure coating device for preparing a large-width ultrathin metal lithium strip and the preparation method, relating to the technical field of preparation of metal lithium materials. The device comprises: a lithium-melting tank (), a micro-gravure roller (), a unwinding device, a substrate back roller (), a hot pressing device and a winding device; wherein the lower portion of the micro-gravure roller () is immersed into the liquid lithium in the lithium-melting tank (); one side of the micro-gravure roller () is provided with a hot scraper (), and the end portion of the hot scraper () is in contact with the surface of the micro-gravure roller (); the substrate back roller () is arranged diagonally above the micro-gravure roller (); the unwinding device is arranged on one side of the substrate back roller (); the winding device is arranged above the substrate back roller (); the hot pressing device is arranged between the substrate back roller () and the winding device; after passing through the substrate back roller () and the hot pressing device, the substrate on the unwinding device is winded onto the winding device. The device is simple in structure and reasonable in design, effectively improves the coating uniformity, and realizes automatic production of ultrathin metal lithium strips with a thickness of 1-50 μm, thereby greatly improving work efficiency and product quality.

Gravure coating device for preparing large-width ultrathin metal lithium strip and method therefor

Provided are an asynchronous heating and calendering device, a large wide ultra-thin lithium metal foil, and preparation method and use thereof, wherein the asynchronous heating and calendering device comprises: a pulling-substrate unwinding unit (E) for unwinding a pulling-substrate (P); a lithium strip unwinding unit (D) for unwinding a lithium strip (S); an asynchronous heating and calendering unit (H) which comprises: a first calendering roller (B), a second calendering roller (A) and a heating box (C), wherein the heating box (C) is used to heat the first calendering roller (B), the first calendering roller (B) heats the pulling-substrate (P), and the first calendering roller (B) and the second calendering roller (A) have parallel axes and are arranged opposite to each other, so that the pulling-substrate (P) and the lithium strip (S) are combined into a composite strip (Z); and a winding unit (G) for winding the composite strip (Z). A large wide ultra-thin lithium metal foil with a uniform thickness may be prepared by providing a heating box (C) and asynchronous first calendering roller (B) and second calendering roller (A) in said device, and the application of this lithium foil in batteries has a relatively high initial efficiency. The width of the lithium foil is 1-600 mm; the thickness of the lithium foil is 1-20 μm; and the initial efficiency of the battery reaches 98%.

Asynchronous heating and calendering device, large wide ultra-thin lithium metal foil, preparation method therefor, and application thereof

Disclosed is a semantic sentiment analysis method fusing in-depth features and time sequence models, including: converting a text into a uniformly formatted matrix of word vectors; extracting local semantic emotional text features and contextual semantic emotional text features from the matrix of word vectors; weighting the local semantic emotional text features and the contextual semantic emotional text features by using an attention mechanism to generate fused semantic emotional text features; connecting the local semantic emotional text features, the contextual semantic emotional text features and the fused semantic emotional text features to generate global semantic emotional text features; and performing final text emotional semantic analysis and recognition by using a softmax classifier and taking the global semantic emotional text features as input.

Semantic sentiment analysis method fusing in-depth features and time sequence models

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Beijing, China

Yongwei Li