LEAD-ACID BATTERY

To provide a lead-acid battery having excellent lifetime characteristics while suppressing the increase in internal resistance and enabling accurate determination of the state of charge and state of deterioration by a method of measuring internal resistance.SOLUTION: A lead-acid battery includes an...

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Bibliographic Details
Main Authors SHIBATA TOMOHITO, SUGA SHINYA, AKASAKA YUICHI
Format Patent
LanguageEnglish
Japanese
Published 11.10.2021
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Summary:To provide a lead-acid battery having excellent lifetime characteristics while suppressing the increase in internal resistance and enabling accurate determination of the state of charge and state of deterioration by a method of measuring internal resistance.SOLUTION: A lead-acid battery includes an electrode plate group 1 formed by alternately stacking a plurality of positive electrode plates 10 having a positive electrode active material containing lead dioxide and negative electrode plates 20 having a negative electrode active material containing metallic lead via a separator 30. The electrode plate group 1 is immersed in an electrolytic solution to form a cell. The flatness of the positive electrode plate 10 after conversion is 4.0 mm or less. Non-woven fabric is in contact with a surface of the positive electrode plate, and the porosity of the non-woven fabric is 60% or more and 85% or less.SELECTED DRAWING: Figure 1 【課題】内部抵抗の上昇が抑制され、内部抵抗を測定する方法により充電状態や劣化状態を正確に判定することが可能であることに加えて、優れた寿命特性を有する鉛蓄電池を提供する。【解決手段】鉛蓄電池は、二酸化鉛を含有する正極活物質を有する正極板10と、金属鉛を含有する負極活物質を有する負極板20とが、セパレータ30を介して複数枚交互に積層された極板群1を備える。この極板群1は電解液に浸漬されてセルを構成している。そして、化成後の正極板10の平面度が4.0mm以下である。また、正極板の表面に不織布が当接されており、不織布の空隙率が60%以上85%以下である。【選択図】図1
Bibliography:Application Number: JP20200063714