Location History:
- Charlotte, NC (US) (1996 - 1999)
- Gastonia, NC (US) (2000)
- Spartanburg, SC (US) (2002 - 2005)
Company Filing History:
4 out of 172 
3 out of 1,194 
1 out of 832,843 Years Active: 1996-2005
Title: Innovations by Wei-Ching Yu in Battery Separator Technology
Introduction
Wei-Ching Yu is a prominent inventor based in Charlotte, NC (US), known for his significant contributions to battery separator technology. He holds a total of 8 patents, showcasing his expertise and innovative spirit in the field.
Latest Patents
One of his latest patents is focused on continuous methods of making microporous battery separators. This invention describes a continuous method of producing dry-stretch microporous membrane battery separators from polypropylene (PP) or polyethylene (PE), or both. The process enhances production efficiency for manufacturers. The precursor-film extrusion is achieved through multiple small film-extrusion lines operating at a compatible line speed with subsequent oven processes, including annealing and stretching. The continuous production process begins with film extrusion, followed by annealing and stretching. The advantages of this innovative method include higher product yield, more effective oven-time usage, reduced handling of intermediate products, decreased labor and machine maintenance, and potentially more stable product quality. The dry-stretch membrane separators produced using this method consist of single-ply PP or PE separators with thicknesses ranging from 0.2 mil to 2.0 mil, as well as PP/PE/PP trilayer microporous membrane separators with thicknesses from 0.6 mil to 4.0 mil. The trilayer can be achieved through co-extrusion or by extruding separately and interposing the PE layer between two PP layers before the annealing and bonding process.
Another notable patent by Wei-Ching Yu involves structurally stable fusible battery separators and the method of making them. This invention discloses a fusible, structurally stabilized battery separator formed by extruding a cylindrical parison of a polymer film and quenching the film on both sides with a low-temperature fluid stream prior to processing the film to impart microporosity. The film typically includes at least one layer of polyethylene and one layer of polypropylene.
Career Highlights
Wei-Ching Yu has worked with notable companies in the industry, including Celgard Inc. and Hoechst Celanese Corporation. His experience in these organizations has contributed to his expertise in battery separator technology.
Collaborations
Throughout his career, Wei-Ching Yu has collaborated with several professionals, including Shawn E. Hux and Margaret W. Geiger. These collaborations have further enriched his work and innovations in the field