FLAT PLATE VERSUS TUBULAR battery

According to this article Flat plate batteries are much better http://www.bulldog-battery.com/wp-content/uploads/file/Battery%20Design%20-%20Copy.pdf

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Flat plate batteries
1. Good Electrical Performance
2. Long Cycle Life
3. Tough And Durable
4. Good Reserve Of Pasted Material For Long Life
5. Good Reserve Of Lead For Long Life
6. With Their Glass Wrap The Plate Is Well Protected
Against Life Limiting Shedding

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vs

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TUBULAR battery

1. GOOD ELECTRICAL PERFORMANCE
2. ADEQUATE LIFE
3. LOW RESERVE OF LEAD
4. LOW RESERVE OF ACTIVE MATERIAL
5. SENSITIVE TO ACTIVE MATERIAL SHEDDING WHICH
SHORTENS CELL LIFE
6. SENSITIVE TO TOP BAR BREAKAGE WITH SIGNIFICANT LOSS
OF PLATE AREA
7. SENSITIVE TO SPINES BEING OFF CENTER OF THE TUBE
WITH SIGNIFICANT LOSS OF PLATE CAPACITY

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while this article states otherwise http://www.iig.com.au/wind/batteries.html

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  • For a start, the positive plate, being constructed of a tube filled with powder, can not fall to bits like other batteries- it is already in bits-, and also, because of the fine powder form, it is extremely resistant to sulphation, the curse of all other lead acid batteries
  • Indeed these Batteries don't mind being partly discharged for months at a time as long as they are being used and don't fall below about 30% of their capacity. They can actually be discharged to 20% of their capacity -
  • The Tubular Positive is a real work horse, lasting in low cycling applications 15 to 20 years, and somewhat less in high cycle applications.
[/quote]

what you guys think ?

Europe uses tubular as against USA which is heavily tilted towards flat plate. The debate is on going since ages. There isn'nt a hell of a difference as far as our interest i.e. solar electricity storage.

The important advantage insofar Pakistan is concerned is that flat plates can be locally rebuilt without having to buy a new battery. Also those who want to develop their own battery by adding as many plates in parallel to enhance capacity using locally fabricated rubber casings.

Aurangzeb

This comparison is heavily exaggerated.. this is not hell vs heaven, angels vs demons.. its mildly comparable like Nawaz Sharif vs zardari.. ie. methodology may vary but results are not that different..

Flat plate are technically longer in life but not by decades, only by a year or so.. they can retain a bit more charge but only a small %...tubular do go deep cycle well but marginally more..

in the end, the only practical advantage of flat plate over tubular is the slightly longer life at a slightly higher price..

PS: charging rates are the real difference which none touched..

I am currently looking at nickle-iron batteries for a.e. applications. This are even stronger than our trusted friend the lead acid battery.

Aurangzeb

[quote=“aurangzebhaque, post:4, topic:21158”]

I am currently looking at nickle-iron batteries for a.e. applications. This are even stronger than our trusted friend the lead acid battery.

Aurangzeb

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just like these guys http://www.solarpaneltalk.com/showthread.php?15302-Nickel-Iron-Batteries-US-produced

he is using them but according to him, NIFe need a lot of water every 3-4 months with wide charging voltage 65V to 45V.

https://www.facebook.com/media/set/?set=a.209740049099456.51681.120212794718849&type=1&l=524f326a38

https://www.facebook.com/media/set/?set=a.209715335768594.51674.120212794718849&type=3&l=bcfbd1f2a0

These 2 graphs are worth looking at

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English: Iron Edison battery cells are designed for a 20-year service life, but the increase in the temperature of electrolyte will reduce the expected life. In general, every 9° C increase in temperature over the normal ambient temperature of 25° C reduces the service life of Iron Edison cells by 20%. For Lead-Acid batteries, every 9° C increase in temperature, service life is reduced by 50%. The above figure shows the comparison graph of life expected at high temperature for both Iron Edison and Lead-Acid batteries
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http://commons.wikimedia.org/wiki/File:Nickel_Iron_Battery_-_Expected_cycle_life.jpg

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English: Because of self-discharge, the state of charge in the open circuit state will decrease slowly with time. The open circuit loss value at different temperatures possibly experienced in renewable energy applications is shown in the graph above.
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http://commons.wikimedia.org/wiki/File:Nickel_Iron_Battery_-_Depth_of_Discharge_life.jpg

so from this graph, around 4 year of battery life is easily possible if the charging/discharging is proper. I will also say that if the graphs gives 4 yrs, it will possibly go to 5yrs in practical if used properly. i persona;;y agree to 4 yrs life span as I had desi ups which almost ruins battery but they worked for more than 2 years.

so what do u recommend?
a tubular battery of volta/osaka brand
OR
a flat plate battery of AGS brand

i just need peace of mind for 02 years
how much charge cycles a tubular battery can withstand as compared to a flat plate battery?