Lead-acid battery
AssigneeGS Yuasa International Ltd.
InventorsHiroki Kagohashi, Yusuke Kumagai
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Abstract
A lead-acid battery includes a positive electrode plate, a negative electrode plate, and an electrolyte solution. The negative electrode plate includes a negative electrode material. The negative electrode material contains a polymer compound. 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, or the negative electrode material contains a polymer compound having a repeating structure of oxy C2-4 alkylene units.
Claims15
A lead-acid battery comprising a positive electrode plate, a negative electrode plate, and an electrolyte solution,
- wherein the negative electrode plate comprises a negative electrode material,
- the negative electrode material contains a polymer compound,
- 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,
- the polymer compound contains at least one selected from the group consisting of an etherified product of a hydroxy compound having a repeating structure of oxy C2-4 alkylene units and an esterified product of a hydroxy compound having the repeating structure of the oxy C2-4 alkylene units,
- the hydroxy compound is at least one selected from the group consisting of a poly C2-4 alkylene glycol, a copolymer having a repeating structure of oxy C2-4 alkylene, and a C2-4 alkylene oxide adduct of a polyol,
- the negative electrode material further contains an organic expander,
- a content of the polymer compound in the negative electrode material is 16 ppm or more and 350 ppm or less on a mass basis, and
- a number average molecular weight of the polymer compound is 1,000 or more and 5,000 or less.
A lead-acid battery comprising a positive electrode plate, a negative electrode plate, and an electrolyte solution,
- wherein the negative electrode plate comprises a negative electrode material,
- the negative electrode material contains a polymer compound having a repeating structure of oxy C2-4 alkylene units,
- the polymer compound contains at least one selected from the group consisting of an etherified product of a hydroxy compound having a repeating structure of oxy C2-4 alkylene units and an esterified product of a hydroxy compound having the repeating structure of the oxy C2-4 alkylene units,
- the hydroxy compound is at least one selected from the group consisting of a poly C2-4 alkylene glycol, a copolymer having a repeating structure of oxy C2-4 alkylene, and a C2-4 alkylene oxide adduct of a polyol,
- the negative electrode material further contains an organic expander,
- a content of the polymer compound in the negative electrode material is 16 ppm or more and 350 ppm or less on a mass basis, and
- a number average molecular weight of the polymer compound is 1,000 or more and 5,000 or less.
Dependencies are inferred from the claim text.