Impregnation liquid special for lead-calcium alloyed grid

Abstract

The invention discloses an impregnation liquid special for a lead-calcium alloyed grid, which comprises, by weight, 5-10% of phosphoric acid, 10% of antimonous oxide, 7-12% of zinc oxide, 5-15% of aluminum sesquioxide, 5-8% of ammonium bicarbonate, 3-5% of cerium hydroxide, 7-15% of tin oxide, and the balance of water. According to the technical scheme, technical operation is simple, formation of a high-resistance layer (CaSO4 crystal) on an active material interface during use of positive grids can be avoided greatly, deep cycle performance of a lead-calcium alloy battery can be improved, and the defect that early capacity loss of a VRLA (valve regulated lead acid) lead-calcium alloy battery is overcome. The battery made of the lead-calcium alloyed grid has no acid gas leakage, is fine in sealing performance, lower in gassing quantity and lower in self-discharge, and has advantages of both the lead-calsium battery and the lead-antimony-cadmium alloy battery, electrical property of an anode film of the grid is improved to the maximum extent, and deep-cycle durability of the lead-acid battery is improved.

Description

technical field [0001] The invention relates to a special impregnation solution for lead-calcium alloy grids of lead-acid batteries. Background technique [0002] As the preferred alloy for the grid material of valve-regulated sealed lead-acid batteries, batteries made of lead-calcium alloy grids have no acid gas leakage, good sealing, smaller gas evolution, lower self-discharge, and hydrogen evolution than low-antimony alloys. The overpotential is high, which can suppress the gas that may be precipitated; the biggest disadvantage of this grid is that a high-resistance layer, that is, calcium sulfate, is formed at the interface between the positive grid and the active material, which is easy to cause early decline in battery capacity, so the lead-calcium alloy grid It is rarely used in the field of deep cycle batteries, and it is also a bottleneck restricting the development of lead-calcium internalization batteries. With the development of electric bicycle batteries, lead-a...

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Problems solved by technology

[0002] As the preferred alloy for the grid material of valve-regulated sealed lead-acid batteries, batteries made of lead-calcium alloy grids have no acid gas leakage, good sealing, smaller gas evolution, lower self-discharge, and hydrogen evolution than low-antimony alloys. The overpotential is high, which can suppress the gas that may be precipitated; the biggest disadvantage of this grid is that a high-resistance layer, that is, calcium sulfate, is formed at the interface between the positive grid and the active material, which is easy to cause early decline in battery capacity, so the lead-calcium alloy grid It is rarely used in the field of deep cycle batteries, and it is also a bottleneck restricting the development of lead-calcium internalization batteries. With the development of electric bicycle batteries, lead-antimony-cadmium alloy grids have been developed rapidly, which are characterized by good corrosion resistance, high strength, deep Long discharge life, not easy to remove powder, etc.; but this grid has cadmium, which is a poisonous metal, so it is not recommended to use it now