Noob Question on Wiring

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suseboy   1 µW

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Noob Question on Wiring

Post by suseboy » Dec 14 2017 9:02pm

Hi All, apologies in advance for such a noob question.

I installed my first hub motor kit and everything worked fine for a couple weeks until the power from the 52V Shark battery kept cutting out. If I wiggled or pulled the wires, the power might temporarily return.

At first, I thought it was my poor soldering (this was the first time I ever soldered anything and it didn't look pretty), so I re-soldered the wires from both the controller and the battery to XT90 pigtails. Same result. It looked more and more like the connection of the wires to the battery board/mount was the culprit and pulling on the wires with the lights turned off confirm this as the connection sparks.

As a total noob, should I disconnect and try to solder the wires to the battery board/mount or take it to an electrician or handyman? Thanks.

markz   100 GW

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Re: Noob Question on Wiring

Post by markz » Dec 14 2017 11:17pm

Yeah you gotta resolder whatever they did on the pack.
Watch some Youtube video's on soldering, get 63/37 as it flows a bit better.
You want shiny concave shapes, you'll see on YT.
XT90 is a great connector, and you got the ones with pigtails so you just solder the crap outta both wires, then glob more on. But yeah you gotta open that pack up right to the battery cans/pouches themselves.

Any ole soldering iron will do 40W, 60W. Maybe you arent using the right solder. 60/40 works too. Use a lot electrical tape!

suseboy   1 µW

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Re: Noob Question on Wiring

Post by suseboy » Dec 15 2017 12:37pm

Okay, I went ahead and removed the loose positive wire on the battery board and re-soldered it onto the metal connector and the power has returned. Going to do a test run today. I guess time will tell how strong my solders are.

Thanks for confirming my suspicions and giving me the push to solder on.

markz   100 GW

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Re: Noob Question on Wiring

Post by markz » Dec 15 2017 1:53pm

While you have it open you should 100% check everything over, including the connection on the other side of the pack, just do a visual over everything.

billvon   1 MW

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Re: Noob Question on Wiring

Post by billvon » Dec 15 2017 3:30pm

suseboy wrote:
Dec 14 2017 9:02pm
As a total noob, should I disconnect and try to solder the wires to the battery board/mount or take it to an electrician or handyman?
Just a note here -

Soldered connections are _terrible_ when it comes to resisting repeated flexing or vibration. If you soldered wires back on, make sure they are anchored in such a way that they are completely immobilized, or they will fail again quickly.
--bill von

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adamsavage79   100 W

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Re: Noob Question on Wiring

Post by adamsavage79 » Dec 15 2017 11:23pm

billvon wrote:
Dec 15 2017 3:30pm

Soldered connections are _terrible_ when it comes to resisting repeated flexing or vibration. If you soldered wires back on, make sure they are anchored in such a way that they are completely immobilized, or they will fail again quickly.
I agree. My XT conectors keep breaking on me about 1-2x a year, due to viberations and moving etc.. I plan to switch to anderson conectors.

tomjasz   1.21 GW

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Re: Noob Question on Wiring

Post by tomjasz » Dec 16 2017 1:33am

Shark pack, Hailong cases have suck connectors. Get updated versions from your dealer. Often the slots in th3 base get spread out and you get intermittent shorts, and sometimes a melt out.
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

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Chalo   100 GW

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Re: Noob Question on Wiring

Post by Chalo » Dec 16 2017 2:59am

tomjasz wrote:
Dec 16 2017 1:33am
Shark pack, Hailong cases have suck connectors. Get updated versions from your dealer. Often the slots in th3 base get spread out and you get intermittent shorts, and sometimes a melt out.
I had that problem with my Shark pack. Intermittent continuity and high resistance on the cradle contacts imitated a BMS or cell voltage problem. I sprung those suckers closed and the problem went away. But that's why I don't remove it more often than necessary-- I reckon the contacts get squished around mostly when sliding the battery on and off.
This is to express my gratitude to Justin of Grin Technologies for his extraordinary measures to save this forum for the benefit of all.

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Re: Noob Question on Wiring

Post by tomjasz » Dec 16 2017 11:56am

Chalo wrote:
Dec 16 2017 2:59am
tomjasz wrote:
Dec 16 2017 1:33am
Shark pack, Hailong cases have suck connectors. Get updated versions from your dealer. Often the slots in th3 base get spread out and you get intermittent shorts, and sometimes a melt out.
I had that problem with my Shark pack. Intermittent continuity and high resistance on the cradle contacts imitated a BMS or cell voltage problem. I sprung those suckers closed and the problem went away. But that's why I don't remove it more often than necessary-- I reckon the contacts get squished around mostly when sliding the battery on and off.
Attachments
Screen Shot 2017-12-11 at 11.04.36 AM.png
Screen Shot 2017-12-11 at 11.04.20 AM.png
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

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Chalo   100 GW

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Re: Noob Question on Wiring

Post by Chalo » Dec 16 2017 4:09pm

What is that?
This is to express my gratitude to Justin of Grin Technologies for his extraordinary measures to save this forum for the benefit of all.

Buk___   10 kW

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Re: Noob Question on Wiring

Post by Buk___ » Dec 16 2017 5:26pm

tomjasz wrote:
Dec 16 2017 11:56am
Intermittent continuity and high resistance on the cradle contacts
Stabilant 22 (No disclaimer required.)

docw009   10 kW

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Re: Noob Question on Wiring

Post by docw009 » Dec 16 2017 11:52pm

suseboy wrote:
Dec 14 2017 9:02pm
At first, I thought it was my poor soldering (this was the first time I ever soldered anything and it didn't look pretty), so I re-soldered the wires from both the controller and the battery to XT90 pigtails. Same result. It looked more and more like the connection of the wires to the battery board/mount was the culprit and pulling on the wires with the lights turned off confirm this as the connection sparks.
Hope you weren't using Home Depot solder. I couldn't find my roll of solder (it's from the 1990's) so I ran out to Home Depot and bought some rosin core stuff. Man, it wasn't shiny and it didn't flow. I tried to do an XT60 and couldn't. Then I saw it's silver bearing solder .. melts around 220C. No good for my tools.

tomjasz   1.21 GW

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Re: Noob Question on Wiring

Post by tomjasz » Dec 17 2017 6:24am

Chalo wrote:
Dec 16 2017 4:09pm
What is that?
New Hailong contacts.
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

suseboy   1 µW

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Re: Noob Question on Wiring

Post by suseboy » Dec 27 2017 8:11pm

Where did you get those contacts? They look much better than the four prong teeth that come with the typical Hailong pack. Thanks.

tomjasz   1.21 GW

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Re: Noob Question on Wiring

Post by tomjasz » Dec 27 2017 11:08pm

suseboy wrote:
Dec 27 2017 8:11pm
Where did you get those contacts? They look much better than the four prong teeth that come with the typical Hailong pack. Thanks.
You dealer should have access.
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

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