Lead-acid storage battery grid with improved corrosion resisting property and preparation method thereof

A lead-acid battery, corrosion resistance technology, applied in the direction of the electrode carrier / current collector, etc., can solve the problems of thickened surface corrosion layer, poor battery cycle performance, etc., to reduce the hot melting temperature, high feasibility, improve durability The effect of corrosion performance

Active Publication Date: 2014-07-09
JIESHOU HUAYU POWER SUPPLY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the current research in this area, there are studies on improving the properties of the grain boundary and improving the corrosion resistance through GBE (grain boundary engineering) technology (limited to the grid after cold rolling); some also improve the corrosion resistance by reducing the grain size. However, this method does not solve the trend of increasing the total amount of corrosion, which may lead to thickening of the surface corrosion layer and poor battery cycle performance

Method used

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  • Lead-acid storage battery grid with improved corrosion resisting property and preparation method thereof
  • Lead-acid storage battery grid with improved corrosion resisting property and preparation method thereof
  • Lead-acid storage battery grid with improved corrosion resisting property and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Alloy material composition: Pb, Sn: 0.3wt.%, Si: 0.03wt.%, and the balance is Pb.

[0024] Si is added in the form of Sn-Si alloy, and it is better if the Sn-Si alloy can be ground into powder. Specifically, the added amount of Si is converted into the amount of Sn—Si through calculation. Then determine the amount of Sn added.

[0025] The following is the specific preparation process:

[0026] (1), each component material is called according to the alloy composition;

[0027] (2) Fully melt the prepared alloy at a temperature of about 500-700°C, cast the grid, and make the grid after cooling.

Embodiment 2

[0029] The ratio between Pb and Sn was the same as in Example 1, and the grid was cast in a conventional manner.

Embodiment 3

[0030] Embodiment 3, to the corrosion experiment of the grid that embodiment 1 and 2 manufacture:

[0031] Corrosion test environment: 60°C water bath, the anode potential of the corrosion grid is 1.35-1.38V (vs Hg / Hg 2 SO 4 electrode), H 2 SO 4 Solution (density: 1.304g / cm 3 , 25°C), and the corrosion time was 129 days.

[0032] The corrosion metallographic diagram of the grid prepared in embodiment 1 and 2 is shown in figure 2 , for the definition of corrosion parameters, see image 3 . For the grid manufactured by the method of Example 2, the number of its corroded parts is counted, and the average number of corroded parts of each grid is 3.38; for the grid manufactured according to the method of Example 1, the number of its corroded parts is counted, and the average The number of corroded parts of each plate grid is: 1.42, and its other corrosion parameters are also slightly improved, see Table 1.

[0033] serial number

The number of corrosion parts ...

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Abstract

The invention provides a lead-acid storage battery grid with improved corrosion resisting property. The lead-acid storage grid is prepared by adding silicon with a mass percent of 0.001-0.35 into a grid alloy material formula and carrying out thermal melting and pouring. The silicon is added in the way of Sn-Si alloy or instant silicon, which can reduce the hot melting temperature for manufacturing alloy; therefore, not only is the manufacture cost reduced, but also the volume of addition of the silicon has a proper proportion when the alloy is manufactured; therefore, the crystal particles are properly enlarged, which cannot influence the strength simultaneously when the corrosion resisting property is improved. Moreover, as the solubility of Si in Pb is quite low, the precipitation of Si particles after final solidification can also intensify the grid materials to a certain extent.

Description

technical field [0001] The invention designs a lead-acid storage battery grid and a preparation method thereof. Background technique [0002] The grid alloy of the lead-acid battery is the main factor leading to the aging of the battery, and the corrosion resistance of the alloy directly determines the service life of the battery. Among the Pb-Sb alloys used in the early stage, Sb has been widely used due to its excellent performance, but because Sb on the positive plate is easy to dissolve and migrate to the negative plate, the hydrogen evolution overpotential is reduced, and the accelerated hydrogen evolution is not conducive to maintenance-free requirements. In the Pb-Ca alloy used later, Ca can increase the hydrogen evolution overpotential of the material, which is beneficial to maintenance-free, but Ca makes the oxide formed during the charge and discharge process make the deep cycle performance of the battery relatively poor, so in Pb-Ca The addition of Sn to the allo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/68H01M4/73
CPCY02E60/10
Inventor 陈亮丁平陈建王长林
Owner JIESHOU HUAYU POWER SUPPLY
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