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#1
posted to rec.boats.cruising,rec.boats.electronics
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NiMH Rechargeable Battery Repair
Sorry for crosspost but r.b.e doesn't seem to see much traffic these days.
I am trying to rebuild several old handheld VHF battery packs that seem no longer commercially available. The radios themselves seem fine and are certainly OK for my application. I took the batteries apart and tried a temporary fix with standard alkaline AA cells, taping aluminum foil in place to make series connections. The radios seemed to like this so I bought a quantity of the corresponding NiMH rechargeable AA cells to make a permanent repair. Problem is I am not at all sure how to secure a conductor from "plus" to "minus" with the cells to make a strong and long-lasting series connection. Is there some kind of conductive adhesive or conductive film that can be used for this application? Larry, where are you when we need you (weak humor)? -- Good luck and good sailing. s/v Kerry Deare of Barnegat http://home.comcast.net/~kerrydeare |
#2
posted to rec.boats.cruising,rec.boats.electronics
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NiMH Rechargeable Battery Repair
Armond,
I do this all the time. I have one on the bench right now waiting for the new cells to come in. It is an old handheld VHF that the owner loves which is good, because the repair will not be cost effective. (He can buy a complete, NIB unit for a few dollars more than the quote. Do not solder to the cells. This is a recipe for problems. The only answer is to get on the web and find NiCad or NiMH (Lithium are still hard to come by) with solder tabs all ready in place. Then you can solder the tabs together or jumper between then to make up the package. If you can't find cells with solder tabs, the only other choice it to use a micro size resistance welder. Good Luck Guy Matt Colie Armond Perretta wrote: Sorry for crosspost but r.b.e doesn't seem to see much traffic these days. I am trying to rebuild several old handheld VHF battery packs that seem no longer commercially available. The radios themselves seem fine and are certainly OK for my application. I took the batteries apart and tried a temporary fix with standard alkaline AA cells, taping aluminum foil in place to make series connections. The radios seemed to like this so I bought a quantity of the corresponding NiMH rechargeable AA cells to make a permanent repair. Problem is I am not at all sure how to secure a conductor from "plus" to "minus" with the cells to make a strong and long-lasting series connection. Is there some kind of conductive adhesive or conductive film that can be used for this application? Larry, where are you when we need you (weak humor)? |
#3
posted to rec.boats.cruising,rec.boats.electronics
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NiMH Rechargeable Battery Repair
Matt Colie wrote:
If you can't find cells with solder tabs, the only other choice it to use a micro size resistance welder. Perhaps silver loaded epoxy as used for chip assembly would work, I have used it to repair car rear window heater traces. Dick |
#4
posted to rec.boats.cruising,rec.boats.electronics
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NiMH Rechargeable Battery Repair
"Matt Colie" wrote
Do not solder to the cells. This is a recipe for problems. I've soldered them successfully. It's definitely not a job for the ham-handed, though, which is why the manufacturers tell you not to do it. I've been buying cells from http://www.all-battery.com lately, btw. Pretty good selection and price, tabbed and otherwise. |
#5
posted to rec.boats.cruising,rec.boats.electronics
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NiMH Rechargeable Battery Repair
In article ,
"Ernest Scribbler" wrote: "Matt Colie" wrote Do not solder to the cells. This is a recipe for problems. I've soldered them successfully. It's definitely not a job for the ham-handed, though, which is why the manufacturers tell you not to do it. I've been buying cells from http://www.all-battery.com lately, btw. Pretty good selection and price, tabbed and otherwise. I have soldered new NiMH, Nicad, and Lithium Cells into new battery packs, for rebuilding Batteries for older Radios for years. I find that if you file the Plating off a small spot on the Cell ends, that they solder a whole lot easier, and with much less heat, than if you don't. Never had a cell, explode, or die prematurely, Yet..... -- Bruce in alaska add path after fast to reply |
#6
posted to rec.boats.cruising,rec.boats.electronics
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NiMH Rechargeable Battery Repair
"Armond Perretta" wrote in message . .. Sorry for crosspost but r.b.e doesn't seem to see much traffic these days. I am trying to rebuild several old handheld VHF battery packs that seem no longer commercially available. The radios themselves seem fine and are certainly OK for my application. I took the batteries apart and tried a temporary fix with standard alkaline AA cells, taping aluminum foil in place to make series connections. The radios seemed to like this so I bought a quantity of the corresponding NiMH rechargeable AA cells to make a permanent repair. Problem is I am not at all sure how to secure a conductor from "plus" to "minus" with the cells to make a strong and long-lasting series connection. Is there some kind of conductive adhesive or conductive film that can be used for this application? Larry, where are you when we need you (weak humor)? Use copper wire and solder it to the top and bottom's of the respective batteries. The trick is to not get the battery ends too hot. Use one of those fancy butane torches that have a tiny flame. They will melt and stick the solder without harming the battery. Practice on a couple dead batteries first to get your technique down. Use rosin core solder. -- Gregory Hall |
#7
posted to rec.boats.cruising,rec.boats.electronics
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NiMH Rechargeable Battery Repair
Gregory Hall wrote:
snip Problem is I am not at all sure how to secure a conductor from "plus" to "minus" with the cells to make a strong and long-lasting series connection. Is there some kind of conductive adhesive or conductive film that can be used for this application? Larry, where are you when we need you (weak humor)? Use copper wire and solder it to the top and bottom's of the respective batteries. The trick is to not get the battery ends too hot. Use one of those fancy butane torches that have a tiny flame. They will melt and stick the solder without harming the battery. Practice on a couple dead batteries first to get your technique down. Use rosin core solder. Our local "Batteries Plus" (USA) will weld tabs onto customer's batteries for a small token payment ($2 last time I had a dozen done). Michael |
#8
posted to rec.boats.cruising,rec.boats.electronics
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NiMH Rechargeable Battery Repair
"msg" wrote in message ... Gregory Hall wrote: snip Problem is I am not at all sure how to secure a conductor from "plus" to "minus" with the cells to make a strong and long-lasting series connection. Is there some kind of conductive adhesive or conductive film that can be used for this application? Larry, where are you when we need you (weak humor)? Use copper wire and solder it to the top and bottom's of the respective batteries. The trick is to not get the battery ends too hot. Use one of those fancy butane torches that have a tiny flame. They will melt and stick the solder without harming the battery. Practice on a couple dead batteries first to get your technique down. Use rosin core solder. Our local "Batteries Plus" (USA) will weld tabs onto customer's batteries for a small token payment ($2 last time I had a dozen done). Michael Strange how at least one subscriber here says "Don't do it!" yet it's plain that it's done all the time. I guess what some people believe is THEY can't do it while a so-called professional can. What they're really saying is don't do it because *I* can't do it and I don't want you doing it because YOU would make ME look bad. They don't believe they have the skill to do a simple job. They don't have the guts to even try it on a dead battery. They would have YOU be the same. How pathetic is that? And these people claim to be sailors? Yeah right! Probably have to pay somebody to repair a tear in a sail, or put an eye splice in doublebraid, or wire up their GPS, or put a coat or two of paint on their boat's bottom, or install new standing rigging, or install new parts in the head pump. Stupidity, laziness, fear, sloth and ineptitude is all that one encounters in this world anymore. A bunch of dependent people all queuing up to pay somebody else with borrowed money to do things they should learn how to do themselves. Disgusting and pathetic! -- Gregory Hall |
#9
posted to rec.boats.cruising,rec.boats.electronics
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NiMH Rechargeable Battery Repair
In article ,
"Gregory Hall" wrote: Strange how at least one subscriber here says "Don't do it!" yet it's plain that it's done all the time. I guess what some people believe is THEY can't do it while a so-called professional can. What they're really saying is don't do it because *I* can't do it and I don't want you doing it because YOU would make ME look bad. They don't believe they have the skill to do a simple job. They don't have the guts to even try it on a dead battery. They would have YOU be the same. How pathetic is that? And these people claim to be sailors? There are good reasons not to do it yourself here. I can solder - but I also know that such a procedure will hurt the battery, and I also know that solder joints are susceptible to failing under vibrations, corrosion etc. Just because something can be done and it works first does not mean it will be reliable and live long. Qualities I tend to look for if it is installed on my boat. Of course everyone is free to use their preferred solution. I just do not recommend soldering for this purpose. It is just like I'd never use screw terminals to join conductors on a boat. HTH Marc -- remove bye and from mercial to get valid e-mail http://www.heusser.com |
#10
posted to rec.boats.cruising,rec.boats.electronics
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NiMH Rechargeable Battery Repair
"Marc Heusser" wrote
Of course everyone is free to use their preferred solution. Whew. |
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