LEAD ACCUMULATOR BATTERY

• Main Authors: MINAMIYAMA MION, SUZUKI KEITA
• Format: Patent
• Language: English; Japanese
• Published: 07.07.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide a lead accumulator battery capable of improving the short circuit resistance between a separator and a positive electrode composed of an active material holding member.SOLUTION: A lead accumulator battery 100 comprises an electrode group 110 in which a negative electrode 20 and a positive electrode 10 that is configured to include an active material holding member 11 composed of a plurality of cylindrical members 12 and a positive electrode material 16 filled in the cylindrical members 12, are laminated via a separator 30. The cylindrical members 12 configuring the active material holding member 11 include a first cylindrical member 12A formed by welding a longitudinal end part 13c of a belt-like base material 13 when the base material 13 is spirally wound. At least a part of a welded portion 70 welded in the first cylindrical member 12A is formed with a projection 71 protruded outside an outer surface of the base material 13 and having a density higher than that of the base material 13. The projection 71 of the cylindrical member 12 is protruded in a direction where the separator 30 is arranged.SELECTED DRAWING: Figure 6 【課題】活物質保持部材からなる正極とセパレータとの間の耐短絡性を向上させることができる、鉛蓄電池を提供する。【解決手段】鉛蓄電池１００は、複数の筒状部材１２からなる活物質保持部材１１と筒状部材１２に充填される正極材１６とを含んで構成される正極１０と負極２０とがセパレータ３０を介して積層される電極群１１０を備える。活物質保持部材１１を構成する筒状部材１２の中には、帯状の基材１３を螺旋状に巻き回したときに基材１３の長手方向端部１３ｃが溶着されることによって形成されている第一筒状部材１２Ａが含まれている。第一筒状部材１２Ａにおいて溶着された溶着部分７０の少なくとも一部は、基材１３の外表面よりも外側に突出すると共に、基材１３の密度よりも密度が高い突出部７１が形成されている。筒状部材１２の突出部７１は、セパレータ３０が配置されている方向に突出している。【選択図】図６