Additive for lead-acid battery and lead-acid battery
AssigneesShunzo Mase, Akiya Kozawa, Takeshi Kawabe
InventorsShunzo Mase, Akiya Kozawa
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Abstract
An additive for lead-acid battery including sulfonated polyacrylic acid aimed at extending the battery life by preventing the sulfation of the negative electrode, and a lead-acid battery using the additive.
Claims34
An additive to be added to the electrolyte of lead-acid batteries comprising a positive electrode of lead peroxide, a negative electrode of metal lead and an electrolyte of diluted sulfuric acid, wherein the said additive is a polymer or copolymer including at least one kind of structural unit expressed by the following chemical formulas 1 through 6, the said polymer or copolymer including a carboxyl group and sulfo group
- (In the formula, M indicates hydrogen atom, alkali metal atom or ammonium group)
- (In the formula, M indicates hydrogen atom, alkali metal atom or ammonium group)
- (In the formula, M and M* indicates hydrogen atom, alkali metal atom or ammonium group)
- (In the formula, M and M* indicates hydrogen atom, alkali metal atom or ammonium group)
- (In the formula, M and M* indicates hydrogen atom, alkali metal atom or ammonium group)
- (In the formula, M and M* indicates hydrogen atom, alkali metal atom or ammonium group).
An additive to be added to the electrolyte of lead-acid batteries comprising a positive electrode of lead dioxide, a negative electrode of metallic lead and an electrolyte of dilute sulfuric acid, wherein the said additive is characterized by containing sulfonated polyacrylic acid having a carboxyl group and a sulfo group.
A lead-acid battery comprising a positive electrode of lead peroxide, a negative electrode of metal lead, an electrolyte of diluted sulfuric acid and a polymer or copolymer additive in the electrolyte including at least one kind of structural unit expressed by the following chemical formulas 1 through 6, the said polymer or copolymer additive including a carboxyl group and sulfo group
- (In the formula, M indicates hydrogen atom, alkali metal atom or ammonium group)
- (In the formula, M indicates hydrogen atom, alkali metal atom or ammonium group)
- (In the formula, M and M* indicates hydrogen atom, alkali metal atom or ammonium group)
- (In the formula, M and M* indicates hydrogen atom, alkali metal atom or ammonium group)
- (In the formula, M and M* indicates hydrogen atom, alkali metal atom or ammonium group)
- (In the formula, M and M* indicates hydrogen atom, alkali metal atom or ammonium group)
- and wherein the concentration of the said polymer or copolymer additive in the said electrolyte is from 0.02 to 1 percent by weight.
A lead-acid battery comprising a positive electrode of lead peroxide, a negative electrode of metal lead, an electrolyte of diluted sulfuric acid, and a polymer or copolymer additive in the electrolyte including at least one kind of structural unit expressed by the following chemical formulas 1 through 6, the said polymer or copolymer additive including a carboxyl group and sulfo group
- (In the formula, M indicates hydrogen atom, alkali metal atom or ammonium group)
- (In the formula, M indicates hydrogen atom, alkali metal atom or ammonium group)
- (In the formula, M and M* indicates hydrogen atom, alkali metal atom or ammonium group)
- (In the formula, M and M* indicates hydrogen atom, alkali metal atom or ammonium group)
- (In the formula, M and M* indicates hydrogen atom, alkali metal atom or ammonium group)
- (In the formula, M and M* indicates hydrogen atom, alkali metal atom or ammonium group)
- and wherein the molar ratio of the said carboxyl group to the said sulfo group in the said polymer or copolymer additive is in the range of 1:9 through 8:2, and the concentration of the said polymer or copolymer additive in the said electrolyte is from 0.02 to 1 percent by weight.
A lead-acid battery comprising a positive electrode of lead peroxide, a negative electrode of metal lead, an electrolyte of diluted sulfuric acid, and a polymer or copolymer additive in the electrolyte including at least one kind of structural unit expressed by the following chemical formulas 1 through 6, the said polymer or copolymer additive including a carboxyl group and sulfo group
- (In the formula, M indicates hydrogen atom, alkali metal atom or ammonium group)
- (In the formula, M indicates hydrogen atom, alkali metal atom or ammonium group)
- (In the formula, M and M* indicates hydrogen atom, alkali metal atom or ammonium group)
- (In the formula, M and M* indicates hydrogen atom, alkali metal atom or ammonium group)
- (In the formula, M and M* indicates hydrogen atom, alkali metal atom or ammonium group)
- (In the formula, M and M* indicates hydrogen atom, alkali metal atom or ammonium group)
- and wherein the molar ratio of the said carboxyl group to the said sulfo group in the said polymer or copolymer is in the range of 1:9 through 8:2, and the average molecular weight of the said polymer or copolymer is from 1,000,000 to 10,000,000, and the concentration of the said polymer or copolymer in the said electrolyte is from 0.02 to 1 percent by weight.
A lead-acid battery comprising a positive electrode of lead peroxide, a negative electrode of metal lead and an electrolyte of diluted sulfuric acid wherein an additive of sulfonated polyacrylic acid is included in the said electrolyte, and wherein the concentration of the said additive in the said electrolyte is from 0.02 to 1 percent by weight.
A lead-acid battery comprising a positive electrode of lead peroxide, a negative electrode of metal lead and an electrolyte of diluted sulfuric acid wherein an additive of sulfonated polyacrylic acid is included in the said electrolyte, and wherein the molar ratio of the said carboxyl group to the said sulfo group in the said additive is in the range of 1:9 through 8:2, and the concentration of the said additive in the said electrolyte is from 0.02 to 1 percent by weight.
A lead-acid battery comprising a positive electrode of lead peroxide, a negative electrode of metal lead and an electrolyte of diluted sulfuric acid wherein an additive of sulfonated polyacrylic acid is included in the said electrolyte, and wherein the molar ratio of the said carboxyl group to the said sulfo group in the said additive is in the range of 1:9 through 8:2, and the average molecular weight of the said additive is from 1,000,000 to 10,000,000, and the concentration of the said additive in the said electrolyte is from 0.02 to 1 percent by weight.
Dependencies are inferred from the claim text.