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Positive plate grid alloy for lead-acid storage battery

A lead-acid battery, positive plate technology, applied in the direction of electrode carrier/current collector, etc., to reduce fracture, prevent capacity decay, and reduce water loss

Inactive Publication Date: 2011-10-05
POWERSON SHANGHAI FORWARD GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no in-depth research has been done on the effect of rare earth elements on battery dehydration and the effect on positive active materials, and the above two aspects are also one of the factors that affect battery life

Method used

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  • Positive plate grid alloy for lead-acid storage battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1 AC impedance research of rare earth elements on lead oxide film

[0023] Using AC voltammetry (ACV) to conduct AC impedance research on the lead oxide film formed by adding 0.1% of 8 kinds of rare earth elements to the test electrode of lead, calcium and tin at 0.9V, the experimental results are shown in Table 1:

[0024] Table 1

[0025] rare earth element

[0026] It can be known from the above that various rare earth elements reduce the impedance of the lead oxide film to varying degrees. Among them, the four elements of praseodymium (Pr), terbium (Tb), samarium (Sm) and gadolinium (Gd) decreased most significantly.

Embodiment 2

[0027] Example 2 Research on Corrosion Rate of Rare Earth Elements on Electrode

[0028] Cyclic voltammetry (CV) was used to study the corrosion rate of the test electrode with 0.1% of lead-calcium-tin and 8 kinds of rare earth elements. The experimental results are shown in Table 2:

[0029] Table 2

[0030] rare earth element

[0031] It can be seen from the above that various rare earth elements have different effects on corrosion resistance. Among them, cerium (Ce), samarium (Sm) and ytterbium (Yb) can improve the corrosion resistance of the substrate, and ytterbium (Yb) has the best effect. On the contrary, lanthanum (La), praseodymium (Pr), neodymium (Nd), gadolinium (Gd) and terbium (Tb) reduce the corrosion resistance of the substrate, among which praseodymium (Pr) and neodymium (Nd) have the worst effect.

Embodiment 3

[0032] Example 3 Research on the Influence of Rare Earth Elements on Battery Float Charge Life

[0033] The alloy (a large amount of lead, calcium 0.08% tin 0.6% rare earth elements 0.05%) is cast into a positive grid with a thickness of 4.0 mm. After coating the positive active material, assemble it into a GMF2-200 backup battery for telecommunications, and carry out a high-temperature accelerated float charge life test according to the Ministry of Information Industry standard (YD / T799-2). The water loss of the battery (after 4 months of high temperature float charge) and float charge life (equivalent to normal temperature 25°C) are shown in Table 3:

[0034] table 3

[0035]

[0036] It can be seen from the above that the addition of rare earth elements can improve the float charge life of the battery. However, the result of prolonging the life of the battery is not directly proportional to the corrosion resistance effect of the rare earth on the alloy and the reductio...

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PUM

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Abstract

The invention provides a positive plate grid alloy for a lead-acid storage battery. The alloy consists of lead, calcium, tin and rare-earth element; the rare-earth element is selected from samarium or terbium; and the alloy comprises the following components in percentage by weight: 0.03 to 0.18 percent of calcium, 0.1 to 2 percent of tin, 0.005 to 0.2 percent of rare-earth element and the balance of lead. The corrosion resistance of the plate grid alloy is improved, the breakage of plate grid ribs is reduced, and the floating charge life of the battery is prolonged. In addition, the charge accepting capability of the battery is improved, capacity attenuation of the battery in the charge / discharge process is prevented, and the cycle life of the battery is prolonged.

Description

technical field [0001] The invention relates to a lead-acid storage battery, in particular to a positive grid alloy of a lead-acid storage battery. Background technique [0002] Valve-regulated sealed lead-acid batteries are mainly divided into two types according to their uses. One is a power valve-regulated sealed lead-acid battery for recycling, and the other is a backup valve-regulated sealed lead-acid battery for floating charging. Among them, examples of dynamic valve-regulated sealed lead-acid batteries are solar backup lead-acid batteries and lead-acid batteries for electric bicycles, which are used in a cycle of charge and discharge; the assessment method of the battery life is the number of cycles; The main factors of the cycle life of VRLA batteries include: ① positive active material (PbO 2 ) Mudification ② The combination film resistance of the positive grid and active material during the floating charge process of the battery; the secondary factors affecting ...

Claims

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Application Information

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IPC IPC(8): H01M4/68C22C11/06
CPCY02E60/12Y02E60/10
Inventor 范海鹰柳厚田
Owner POWERSON SHANGHAI FORWARD GROUP
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