lead-acid batteries

Abstract

SOLUTION: To provide a lead storage battery which has a positive electrode plate, a negative electrode plate, a porous film which is interposed between the positive electrode plate and the negative electrode plate and is made of a resin, a non-woven fabric which is interposed between the positive electrode plate and the negative electrode plate and is brought into contact with the positive electrode plate, and an electrolyte, wherein a chemical oxygen request amount in the electrolyte is 160 mg / L or less.SELECTED DRAWING: Figure 1

Claims

1. Positive plate and The negative electrode plate and A porous resin film interposed between the positive electrode plate and the negative electrode plate, A nonwoven fabric interposed between the positive electrode plate and the negative electrode plate and in contact with the positive electrode plate, Electrolyte and Equipped with, The aforementioned nonwoven fabric is a mat mainly composed of glass fibers. A lead-acid battery in which the chemical oxygen demand in the electrolyte is 160 mg / L or less.

2. The lead-acid battery according to claim 1, wherein the nonwoven fabric is a mat containing the glass fibers and organic fibers.

3. The lead-acid battery according to claim 1, wherein the chemical oxygen demand is 100 mg / L or less.

4. The lead-acid battery according to claim 1, wherein the chemical oxygen demand is 1.0 mg / L or more.

5. The lead-acid battery according to claim 1, wherein the nonwoven fabric is fixed to the surface of the positive electrode plate.

6. The lead-acid battery according to claim 1, wherein the porous film has a thickness of 100 μm or more and 300 μm or less.

7. The lead-acid battery according to claim 1, wherein the nonwoven fabric has a thickness of 30 μm or more and 800 μm or less.

8. The lead-acid battery according to claim 1, wherein the porous film has at least a portion of its edges that is not covered by the nonwoven fabric.

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