US 11,735,742 B2
Lead-acid battery
Yasunori Mizoguchi, Kyoto (JP); and Hiroki Kagohashi, Kyoto (JP)
Assigned to GS Yuasa International Ltd., Kyoto (JP)
Appl. No. 17/608,870
Filed by GS Yuasa International Ltd., Kyoto (JP)
PCT Filed May 29, 2020, PCT No. PCT/JP2020/021480
§ 371(c)(1), (2) Date Nov. 4, 2021,
PCT Pub. No. WO2020/241883, PCT Pub. Date Dec. 3, 2020.
Claims priority of application No. 2019-103303 (JP), filed on May 31, 2019.
Prior Publication US 2022/0328844 A1, Oct. 13, 2022
Int. Cl. H01M 4/73 (2006.01); H01M 4/68 (2006.01); H01M 4/14 (2006.01); H01M 10/06 (2006.01)
CPC H01M 4/68 (2013.01) [H01M 4/14 (2013.01); H01M 10/06 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A lead-acid battery comprising a positive electrode plate, a negative electrode plate, an electrolyte solution, and a polymer compound, wherein
the positive electrode plate includes a positive current collector and a positive electrode material,
the negative electrode plate includes a negative current collector and a negative electrode material, wherein at least the negative electrode material contains the polymer compound,
the Ca content of the positive current collector is 0.13% by mass or less, and
the polymer compound has a peak in a range of 3.2 ppm or more and 3.8 ppm or less in a chemical shift of 1H-NMR spectrum, and the polymer compound contains a repeating structure of oxy C2-4 alkylene units.