Topic: Re: battery tender?
|John Deere Tractors Discussion Forum|
[Show Entire Topic] [Return to Forum]
[Show Entire Topic]
[Return to Forum]
[Add a Reply]
Lee, very interesting information. I'd never thought about the possibility of reversing the polarity of a lead-acid battery, but there is no reason it can't happen. I had to go back to my old chemistry texts to refresh my memory of the details of the process.
When fully discharged, the "positive" and "negative" plates are actually lead sulphate (PbSO4) and the electrolyte is mostly water. So, when charging occurs, electrons are forced from the positive plate which is converted from PbSO4 to PbO2, and the negative plate gains the electrons and is converted from PbSO4 to Pb (pure lead). And, the SO2 ions from this process create more sulphuric acid in the electrolyte, so the specific gravity (and acidity) increases.
Accordingly, when completely discharged, the battery doesn't care which plates are forced to be positive or negative. The polarity is established upon charging (assuming the battery is COMPLETELY discharged prior to charging).
Neat information. Thanks for the insight.
|Same-Day Shipping! Most of our stocked parts ship the same day you order (M-F). Expedited shipping available, just call! Most prices for parts and manuals are below our competitors. Compare our super low shipping rates! We have the parts you need to repair your tractor. We are a Company you can trust and have generous return policies! Shop Online Today or call our friendly sales staff toll free (800) 853-2651. [ More Info ]|
| Copyright © 1997-2013 Yesterday's Tractor Co.|
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
Yesterday's Tractors - Antique Tractor Headquarters