Secondary battery and method for manufacturing the same
By bending lamination technology of negative electrode and separator sheet without negative electrode active material, the problem of insufficient energy density, capacity and productivity of lithium metal secondary batteries is solved, and high energy density, high capacity and excellent cycle characteristics are achieved.
Patent Information
- Application Number
- CN202080101813.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-06-10
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2040-06-10
AI Technical Summary
The energy density, capacity, circulation characteristics and productivity of existing lithium metal secondary batteries are insufficient, especially the negative electrode is thin and difficult to handle, resulting in low productivity and poor circulation characteristics.
A negative electrode without negative electrode active material is used, and a laminate is formed by alternately bending the negative electrode and the separator sheet at an acute angle to form a laminated body, and a positive electrode is arranged in the gap therebetween, and a metal is precipitated and dissolved on the surface of the negative electrode for charging and discharging, and is manufactured using an automatic lamination device.
It achieves high energy density and capacity, improves circulation characteristics and productivity, avoids negative electrode folds and fractures, and improves safety and stability.