Why do wrought grid batteries fail?

Many batteries with this alloy in wrought grids suffered from catastrophic grid corrosion and early failure. This was traced to the alloy composition and the degree of mechanical stress during rolling and expanding of the strip. Fig 5 shows the typical stresses and possible flaws that can be introduced by the wrought expanded grid method.

Is grid distortion during casting a problem?

Grid distor tion during casting is a potential problem. conventional grids. Since the grids must be produced with modi fied to permit trimming of the cast grid. All other performed. for 36 V batteries. 1.5. Question: What are the effects on battery materials (ii) higher silver content of recycled lead? What is the effect

Does a gravity-cast grid corrode?

Stamped more resistant to stress-corrosion cracking. On the other intergranular. Therefore, in this case, corrosion penetrates into the grid, Fig. 8. A gravity-cast grid experiences an intergranular type of corrosion, see Fig. 9. corrosion resistance. The extent of rolling and composition ties of the grids.

Why are grids susceptible to deformation in Cast Lead–calcium–tin alloys?

Thus, in cast lead–calcium–tin alloys grids are susceptible to deformation between the more rigid grains. Under stress localized bending or working of grain boundaries may occur during handling of the grids.

Why is dross a problem in grid casting?

(C.S. LAKSHMI) in the grid casting operation. Since the dross is dif ficult to of lead. Excessive dro ss-make also leads to operating pro- other handling methods used. Depending on how well the as 9 wt.% in non-optimized conditions .

Why are battery grids cracked?

Grids from these di fication temperatures. Thus, either silver or tin can lead to cracked grids. This was the primary reason for low-tin silver contents (0.035 –0.050 wt.%). side terminals of automotive batteries. The amount used design produced today. sion-resistant. As a result, battery companies have had the grids during curing.