tag:blogger.com,1999:blog-7834826019588534175.post4511300521068088122..comments2023-09-20T06:10:29.485-04:00Comments on The Marine Installer's Rant: Death revealed in the bilgeBill Bishop - Parmainhttp://www.blogger.com/profile/11554223870035485145noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-7834826019588534175.post-83618075979058766372012-01-02T14:36:35.131-05:002012-01-02T14:36:35.131-05:00Good comment, and I think your observation is corr...Good comment, and I think your observation is correct that having the sensor on the side of the battery would in general be better. That being said, every boiling battery I have dealt with has been stinking hot everywhere, and depending on the battery box it may be difficult to do. Also, the odds are that the battery in the bank that has shorted, is often the one that does not have the probe attached to it, hence insuring that all of the batteries will have to be replaced. But I do agree with your point, side is betterBill Bishop - Parmainhttps://www.blogger.com/profile/11554223870035485145noreply@blogger.comtag:blogger.com,1999:blog-7834826019588534175.post-34459485387251546982012-01-02T14:01:12.509-05:002012-01-02T14:01:12.509-05:00A minor point. I was under the impression that a b...A minor point. I was under the impression that a battery temperature sensor of the type shown should be attached on the SIDE of the battery where it will read the temperature of the electrolyte. It seems that the location shown will be measuring the temperature of the air above the electrolyte and will be very slow in reacting to an overtemp situation.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-7834826019588534175.post-82131547994766763512011-04-08T00:05:13.452-04:002011-04-08T00:05:13.452-04:00I've seen an AGM fail in this way too. It was ...I've seen an AGM fail in this way too. It was from the best known brand and caused a huge acidic mess. When contacted, the mfgr said it was impossible.Ryanhttps://www.blogger.com/profile/07324668588767757759noreply@blogger.comtag:blogger.com,1999:blog-7834826019588534175.post-3768983345758883422011-01-14T18:57:48.087-05:002011-01-14T18:57:48.087-05:00Seems like it wouldn't be that difficult to bu...Seems like it wouldn't be that difficult to build a comparator circuit between the charger and the temp sensor so that one could place a sensor on each battery. The comparator would detect when a sensor was reading differently from the others and send that signal to the charger. A few op-amps and a handful of discreet components is all it would take, I expect.wilfitenoreply@blogger.comtag:blogger.com,1999:blog-7834826019588534175.post-48092410263384702322011-01-11T15:28:59.426-05:002011-01-11T15:28:59.426-05:00I had this exact type of failure happen to a crank...I had this exact type of failure happen to a cranking battery a couple of years ago. No warning, no obvious deterioration- a cell just shorted (probably due to being 9 years old), the regulator obligingly cranked up the voltage and boiled off most of the electrolyte. The next time we turned the key, it dropped to a hair over two volts under load- and, yep, 10-point-something when unhooked.<br />It's too bad most regulators aren't smart enough to catch this without waiting for an overheat condition. Anything below 11, maybe 11.5 V or so really ought to trigger an alert and shut off the charger or regulator until someone can confirm that the battery's OK.Matt Marshhttp://www.marsh-design.comnoreply@blogger.com