The present disclosure provides a positive electrode active material, a sodium-ion battery and a preparation method therefor and an electrical device, relating to the technical field of secondary batteries. The positive electrode active material includes a...

The present disclosure provides a battery welding defect detection system, method, device, and storage medium, wherein the system includes: the acquisition processing module, configured to acquire the welding image of the battery welding object and pre-pro...

The present disclosure provides a battery explosion-proof structure and a battery, involving the technical field of batteries. The battery explosion-proof structure includes a housing body, a current collector, a sealing member, and an explosion-proof shee...

Disclosed is a safe cylindrical battery, including a battery housing, wherein a core assembly is arranged in the battery housing, and the core assembly includes an electrode sheet, a compact full electrode lug, and a channel full electrode lug; the compact...