US 12,444,774 B2
Lithium battery production process and equipment
Wenjun Li, Beijing (CN); Yunhao Liu, Beijing (CN); Baopeng Hou, Beijing (CN); Huigen Yu, Beijing (CN); and Yongwei Li, Beijing (CN)
Assigned to BEIJING WELION NEW ENERGY TECHNOLOGY CO., LTD, Beijing (CN)
Appl. No. 17/788,963
Filed by BEIJING WELION NEW ENERGY TECHNOLOGY CO., LTD, Beijing (CN)
PCT Filed Dec. 23, 2020, PCT No. PCT/CN2020/138599
§ 371(c)(1), (2) Date Jun. 24, 2022,
PCT Pub. No. WO2021/129659, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 201911380391.3 (CN), filed on Dec. 27, 2019.
Prior Publication US 2023/0344012 A1, Oct. 26, 2023
Int. Cl. H01M 10/0587 (2010.01); H01M 10/04 (2006.01); H01M 10/052 (2010.01)
CPC H01M 10/0587 (2013.01) [H01M 10/052 (2013.01); H01M 10/0409 (2013.01); H01M 10/0431 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A lithium battery production process, comprising the steps of:
pre-compounding: a positive electrode, a separator, a negative electrode, and another separator are stacked neatly in any order, and then moderately rolled by a lead-in roller to compound into a battery strip, and the battery strip is continuously sent to a downstream prism through fixed axis rotation of the lead-in roller;
winding for lamination: through continuous fixed axis rotation of the prism, the battery strip is continuously wound and laminated on the outer peripheral surface of the prism, and the battery strip wound on the outer peripheral surface of the prism are pressed by a pressing assembly;
cutting: when the number of winding layers of the battery strip on any bearing surface of the prism meets the set number of winding layers for a product, the battery strip on the corresponding bearing surface that meets the number of winding layers for a product is precisely cut into a single battery assembly prefabricated product by a cutting assembly;
reclaiming material: the single battery assembly prefabricated product is made to continuously and synchronously rotate with the prism to a downstream reclaiming station, and then the single battery assembly prefabricated product is removed from the prism by a reclaiming assembly and placed into a downstream storage station or a downstream process equipment;
continuously processing: the above-mentioned cutting process and reclaiming process are repeated cyclically in sequence, and each of the single battery assembly prefabricated products that completely undergoes the above-mentioned process is removed one by one;
and assembling a finished product: when the number of the single battery assembly prefabricated products generated by continuously processing meets product requirements, each of the single battery assembly prefabricated products are stacked neatly and then uniformly assembled into battery prefabricated products.