Lead-based alloy for lead acid battery substrate for lead acid battery and lead-acid battery

A technology of lead-acid batteries and lead-based alloys, which is applied in the field of lead-based alloys for lead-acid batteries, substrates for lead-acid batteries and lead-acid batteries to achieve excellent corrosion resistance, excellent mechanical strength, and high-current charging and discharging characteristics

Inactive Publication Date: 2004-09-29
THE FURUKAWA BATTERY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thinning the electrode plate in order to increase the surface area is effective in improving the high-current charge and discharge characteristics, but the problems of corrosion resistance and permanent deformation become more significant.

Method used

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  • Lead-based alloy for lead acid battery substrate for lead acid battery and lead-acid battery
  • Lead-based alloy for lead acid battery substrate for lead acid battery and lead-acid battery
  • Lead-based alloy for lead acid battery substrate for lead acid battery and lead-acid battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～7

[0129] (Examples 1-7, Comparative Examples 1-5)

[0130] Twelve pairs of grid substrates having protrusions were produced by cassette die casting using 12 types of lead-based alloys having the compositions shown in Table 1 below (substantially Pb other than the components in Table 1). Casting takes place at a rate of 15 blocks per minute. Among the obtained pair of grid substrates, the grid substrates of Examples 1 to 7 were softer and more easily deformed than the grid substrates of Comparative Examples 1, 2, 4, and 5 having a large amount of Ca. For this reason, cooling air was blown after casting to remove unnecessary parts, and then heat treatment was performed on these substrates at 100° C. for 1 hour to age harden them.

[0131] Next, a positive electrode paste obtained by mixing and stirring PbO powder and sulfuric acid aqueous solution was filled into the pair of grid substrates by a well-known method. In this step, deformation of the grid substrates of Examples 1 to...

Embodiment 8、9 and comparative example 6、7

[0138] Cast ingots composed of four types of lead-based alloys having the compositions shown in Table 2 below (substantially Pb other than the components in Table 2) were rolled to produce four types of alloy plates with a thickness of 0.9 mm. These alloy plates are expanded to become expanded substrates. These expanded substrates were filled with a positive electrode paste obtained by mixing and stirring PbO powder and sulfuric acid aqueous solution by a well-known method, and then cured for 24 hours in an atmosphere at a temperature of 40° C. and a humidity of 95%. Then, it was dried to make four kinds of positive electrode cured plates.

[0139] The obtained positive electrode solidified plates are respectively combined with the negative electrode solidified plates by means of stopper base separators made of fine glass fibers (by a well-known method, a grid substrate made of Pb-Ca-Sn is filled with an aqueous sulfuric acid solution). PbO powder and additives such as lignin...

Embodiment 10～13

[0144] A cast substrate (grid substrate) was produced from a cassette mold using a lead-based alloy of Ca 0.040 wt%, Sn 1.00 wt%, Al 0.020 wt%, Ba 0.008 wt%, and the balance being Pb. The casting was performed at a rate of 15 blocks per minute. The resulting grid substrate was subjected to heat treatment for 1 hour (Example 10), 1.5 hours (Example 11), 3 hours (Example 12) and 10 hours (Example 13) at various temperatures .

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Abstract

Provided is a lead-based alloy for a lead-acid battery, comprising not less than 0.02% and less than 0.05% by weight of calcium, not less than 0.4% and not more than 2.5% by weight of tin, not less than 0.005% and not more than 0.04% by weight of aluminum, not less than 0.002% and not more than 0.014% by weight of barium, and the balance of lead and unavoidable impurities.

Description

technical field [0001] The present invention relates to lead-based alloys for lead-acid batteries, substrates for lead-acid batteries and lead-acid batteries, in particular to exhibiting excellent corrosion resistance and mechanical strength when used in plate grids, and also suitable for gravity casting, continuous Cast and rolled lead-based alloys for lead-acid batteries, substrates for lead-acid batteries, and lead-acid batteries. Background technique [0002] Recently, the temperature inside the cabin of a car has risen remarkably due to the increase in equipment and the design that eliminates extra space. For this reason, on-board lead-acid batteries are always placed in an overcharged state and used under harsh conditions. As a result, lead-acid storage batteries are prone to corrosion of the grid substrate of the positive plate or deformation caused by stretching called permanent deformation (growth) of the grid substrate, and quickly reach the end of life, so there ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C11/06H01M4/68H01M4/73
CPCY02E60/12H01M4/73C22C11/06H01M4/685Y02E60/10H01M4/68
Inventor 古川淳根兵靖之森丰平城智博
Owner THE FURUKAWA BATTERY CO LTD
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