Cylindrical battery and method for manufacturing cylindrical battery
The cylindrical battery design with a single electrode lead and multiple dot-shaped welds addresses heat-related issues in laser welding, ensuring high-quality battery production by preventing blowholes and spatter.
WO2026116177A1PCT designated stage Publication Date: 2026-06-04PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
- Filing Date
- 2025-11-19
- Publication Date
- 2026-06-04
Smart Images
Figure JP2025040376_04062026_PF_FP_ABST
Abstract
This battery is provided with: an electrode body in which an elongated positive electrode and an elongated negative electrode are wound with a separator interposed therebetween; an outer can that houses the electrode body; a sealing body for closing an opening of the outer can; and only one positive electrode lead that electrically connects the positive electrode and the sealing body. The positive electrode lead is joined to the sealing body by a plurality of dot-shaped welded portions (41). By adopting such a configuration, formation of a hole in a welded portion of the positive electrode lead to the sealing body can be suppressed, thereby making it possible to achieve a cylindrical battery with improved quality and a method for manufacturing the cylindrical battery.
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