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Old Oct 31, 2009, 10:09 PM
Mach 1
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walterboro s.c.u.s.a
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lipo wire

One of the small wires coming out of the balancing plug, into the batt. pulled out.

tell me there is a fix for this?


jimmy.p.
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Last edited by pathfinder; Oct 31, 2009 at 10:21 PM.
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Old Oct 31, 2009, 10:23 PM
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San Jose, California
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Quote:
Originally Posted by pathfinder View Post
One of the small wires coming out of the balancing plug, into the batt. pulled out.

tell me there is a fix for this?


jimmy.p.

sure. carefully unwrap the lipo and solder the broken wire back on. just be very careful not to touch any of the tabs together or you'll get a nice shock.
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Old Oct 31, 2009, 10:33 PM
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Remove the pin and crimp or solder the wire back on.

First I would discharge the battery to 10.5V

Look at the top of the JST plug, you'll see the pins side exposed. There will be a little barb sticking up. Push down on that barb and the pin will come out.

After the wire is reconnected, push the pin back in till that barb catches on the inside again.

BE CAREFUL - pins are HOT and should never touch each other..
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Old Oct 31, 2009, 10:35 PM
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yahh this is a big problem with the balance tabs they use solid core wire. Dream hobbies sells balance tabs with wire that is made with multi strand wire.
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Old Nov 01, 2009, 06:49 AM
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Or take the easy way out and don't charge via the balance connector.
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Old Nov 01, 2009, 08:52 AM
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Quote:
Originally Posted by videocruzer View Post
yahh this is a big problem with the balance tabs they use solid core wire. Dream hobbies sells balance tabs with wire that is made with multi strand wire.
Huh? I have never seen this.
Rick, NOT Rich
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Old Nov 01, 2009, 09:11 AM
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Originally Posted by rampman View Post
Huh? I have never seen this.
Rick, NOT Rich
Hah! That's rich.

It's silly to imagine anyone would try single strand wire. It would not last through one charging cycle.
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Old Nov 01, 2009, 09:28 AM
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It's silly to imagine anyone would try single strand wire. It would not last through one charging cycle.
Agree that it would be foolish but I hazard to bet that it would last far longer than one would think, especially if made of very ductile copper.

100% of every balance tap wire that I have seen break has occurred at the soldered interface where the wire is effectively single strand due to solder wicking up the wire (and precisely why I reinforce them here).

If the wire were single strand buss, it'd be stiffer but not likely a whole lot less durable.

Mark
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Old Nov 01, 2009, 09:29 AM
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Quote:
Originally Posted by rich smith View Post
It's silly to imagine anyone would try single strand wire. It would not last through one charging cycle.
Agree that it would be foolish but I hazard to bet that it would last far longer than one would think, especially if made of very ductile copper.

100% of every balance tap wire that I have seen break has occurred at the soldered interface where the wire is effectively single strand due to solder wicking up the wire (and precisely why I reinforce them here).

If the wire were single strand buss, it'd be much stiffer but not likely a whole lot less durable.

Mark
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Old Nov 01, 2009, 09:51 AM
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I was thinking of crimping issues with single strand too.
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Old Nov 01, 2009, 09:52 AM
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I was thinking of crimping issues with single strand too.
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Old Nov 01, 2009, 11:42 AM
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one more time
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Old Nov 01, 2009, 04:56 PM
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I was thinking of crimping issues with single strand too,.......................


I appreciate the help.I will be carefull trying to fix it.I think I will break out the safety glasses.
I am also going to tape the balance plug, to the side of the batt. when not in use.

jimmy.p.
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Old Nov 01, 2009, 08:56 PM
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Originally Posted by pathfinder View Post
I am also going to tape the balance plug, to the side of the batt. when not in use.
Good idea. Suggest that you leave the tape there permanently. I put a small piece of tape on mine right where the balance wires exit the pack to immobilize them. 99.9% of the time this is precisely where they break due to work hardening of the wire adjacent the solder joint. Immobilizing them makes it nearly impossible to break.

Mark
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Old Nov 02, 2009, 11:00 PM
Mach 1
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walterboro s.c.u.s.a
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Thank you gentleman,got it all fixed up.
Now I know how the wires are soldered inside a lipo pack.


jimmy.p.
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