CYLINDRICAL SECONDARY BATTERY AND MANUFACTURING METHOD THEREOF

To provide a cylindrical secondary battery and a manufacturing method thereof that suppress fluctuations in capacity retention rate due to the battery posture.SOLUTION: A cylindrical secondary battery 100 includes a spiral electrode body 3 in which a positive electrode plate 4 and a negative electrode plate 5 are laminated in an insulating state with a separator 6 interposed between, and a hollow portion 7 is provided in the core of the spiral electrode body, and a liquid absorbing rod 8 that absorbs and discharges an electrolytic solution is arranged in the hollow portion. In addition, in a cylindrical secondary battery and a manufacturing method, a spiral electrode body in which a positive electrode plate and a negative electrode plate are laminated in an insulating state with a separator interposed between is provided, a hollow portion is provided in the core of the spiral electrode body, and a liquid absorbing rod is provided that injects a liquid or paste raw material into the hollow portion, molds the injected raw material in the hollow portion, and absorbs and discharges the electrolyte.SELECTED DRAWING: Figure 1 【課題】電池の姿勢による容量維持率の変動を抑制する円筒形二次電池とその製造方法を提供する。【解決手段】正極板４と負極板５を、セパレータ６を介して絶縁状態に積層してなる渦巻電極体３を備え、渦巻電極体の巻き芯に中空部７を設けており、中空部には電解液を吸収して排出する吸液ロッド８を配置している、円筒形二次電池１００。また、正極板と負極板が、セパレータを介して絶縁状態に積層してなる渦巻電極体を備え、渦巻電極体の巻き芯に中空部を設け、中空部に液状ないしペースト状の原料を注入し、注入された原料を中空部で成形して電解液を吸収して排出する吸液ロッドとする、円筒形二次電池の製造方法。【選択図】図１