Saving Stripped Threads on Battery Module: Worth doing?

Go to the auto parts store and you'll find some special nuts You should find your size covered the inside of the thread of the nut It's got crosshatches in it and all kinds of nonsense and it's made in such a way that when you put it on it's going to cut some new threads or remove some material in such a way so the thing fastens well don't over-tighten etc once you take it off you have to get another nut.

 

If your pack has never had a bad module it'd be wise to rethread and keep it. Try to rethread it at same diameter before going smaller. But if you've already replaced modules in this pack, it will eliminate a failure risk by replacing it. Professor Joe in Bend, Oregon sells high quality modules because he's spent more than $20K in testing equipment several times in past 15 years: Hybrid Car Battery Distributor | Contact Us | 2nd Life Battery

 

Odds are pretty good that a quality die will straighten out those smeared threads well enough that a new nut could grip it at 48 inch-pounds. But, if not, it would be best to replace it. Next best would be trying to go a size smaller. Just be slow and careful.
IIRC, those are 5 x 0.8 mm threads

 

how much stress was put on the post? id wonder if the module cracked . but im kind of a worry wort

 

You can buy self-threading nuts from many suppliers You just need to make sure that they're made to work in the size that you're working with that stripped That's about it Will they hold oh yeah they'll hold You don't want to be blasting on them with impact guns you know taking them off is one thing or loosening them but you should just be using an electric screwdriver You don't need to be impacting them off You don't need to be swinging a controlled hammer which is what an impact gun is on these little tiny nuts that's just silly. You can use an electric screwdriver but you're going to twist and lefty loosey then hit the button That's what you're going to do for every one of them not try to blast and loose with an impact gun That's just not a thing unless you're throwing the stuff out and you just don't care then why are you disassembling it. Just for fun but that's the case then you can strip and break what you want. Just realize you're doing all this work for this amount of milliamps and all of that your time is worth something so what you're doing here is worth 5 or $600 and that's what you would pay somebody to do this put that five or $600 towards a well rebuilt battery or a new one My guy locally charges me $550 I get a car with a bad battery I take the battery to him pick up one out of the lock box in front of the shop set it in the car I'm driving put the bad battery in the lock box close it lock it up leave the money in the lock box and drive off with my battery If it doesn't work right or fails I just bring it back up to him pick up another one which is very rare with this guy I haven't had any problems .

 

Are the nuts as accurate as using a dye No they're not they are made for stripped studs that are probably a little smaller now than the machine shop die that is made for cutting the original size threads when the stud was made and ready to fit as new to a module obviously now because the stud is stripped and fubar you're going to use one of these self-threading nuts which on purposely is manufactured a tad smaller and has these funny looking threads that were put into the nut with a special dye or they were poured that way whichever makes no difference to me but I've used them on exhaust work and all kinds of stuff and once you get them on you don't want to be taking them off again when you take them off again the next time you're probably be getting new modules or be putting in a new battery pack and you're just taking this one apart because well maybe there's nothing else to do or something certainly not to be saving any of this stuff by that time I mean these are all stopgap measures that may not work very long at all enough for you to dump the car on somebody or some such kind of thing You know it's like when people in the penitentiary used to tell you yeah put your d batteries in the refrigerator for a little while and the radio will work a little longer yeah okay Not really . Dead batteries get replaced generally speaking not put in the fridge not overly discharged and recharged and discharged and recharge again just because but people will do what they think is going to work. When the batteries wear out in your flashlight what do you do go to the store and get another set of duracells but yet in our car was 28 Duracell modules we want to go out and unbolt them cycle them through charges and discharges and charges again so on and so forth and then expect a better result pretty cool doesn't seem really logical to me but people make it work so there's always that.