Qulbix Q76R 18650 battery build

Batteries, Chargers, and Battery Management Systems.
litespeed   100 kW

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Re: Qulbix Q76R 18650 battery build

Post by litespeed » Jun 18 2016 10:32pm

Very nice.

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redilast   1 kW

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Re: Qulbix Q76R 18650 battery build

Post by redilast » Jun 19 2016 7:08am

Wow thats a monster of a pack! :shock:

Well done with the neat build! Did you get much electrode sticking when welding the pure nickel 0.2mm sheet?

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Quokka   1 kW

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Re: Qulbix Q76R 18650 battery build

Post by Quokka » Jun 19 2016 8:24am

redilast wrote:Wow thats a monster of a pack! :shock:

Well done with the neat build! Did you get much electrode sticking when welding the pure nickel 0.2mm sheet?
Nope, not once. I gave the electrode tips a clean after every plate. Just a quick hit with some sandpaper to keep them clean. I guess it also depends on the welder. I have another welder that sticks like mad, but i think its just too much power running through the weld
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Ozzzz   100 W

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Re: Qulbix Q76R 18650 battery build

Post by Ozzzz » Jun 19 2016 9:33am

Nice job Quokka.
Can you share any more on the source or shipping advice. I see that Fastek have all sorts of dis allowed shipping methods now besides AU post, I very much doubt Aus Post would work.

Nice Work.

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macribs   1.21 GW

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Re: Qulbix Q76R 18650 battery build

Post by macribs » Jun 19 2016 4:57pm

Great thread Quokka. Clever to use those big sheets of nickel.

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Samd   1.21 GW

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Re: Qulbix Q76R 18650 battery build

Post by Samd » Jun 20 2016 6:49pm

Awesome planning and great execution.
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redilast   1 kW

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Re: Qulbix Q76R 18650 battery build

Post by redilast » Jun 24 2016 11:27pm

Quokka wrote:
redilast wrote:Wow thats a monster of a pack! :shock:

Well done with the neat build! Did you get much electrode sticking when welding the pure nickel 0.2mm sheet?
Nope, not once. I gave the electrode tips a clean after every plate. Just a quick hit with some sandpaper to keep them clean. I guess it also depends on the welder. I have another welder that sticks like mad, but i think its just too much power running through the weld
Interesting. I'm using a professional Sunstone engineering welder and it sticks a lot with normal copper electrodes. With the special electrodes (I think they have aluminum oxide in the copper) they stick less but still its not good. For me i find if I move the electrodes immediately after firing the weld I don't get much sticking. What kind of electrodes did you use? Do you see any copper left behind on any of your spot welds?

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Quokka   1 kW

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Re: Qulbix Q76R 18650 battery build

Post by Quokka » Jun 25 2016 1:06am

redilast wrote:
Quokka wrote:
redilast wrote:Wow thats a monster of a pack! :shock:

Well done with the neat build! Did you get much electrode sticking when welding the pure nickel 0.2mm sheet?
Nope, not once. I gave the electrode tips a clean after every plate. Just a quick hit with some sandpaper to keep them clean. I guess it also depends on the welder. I have another welder that sticks like mad, but i think its just too much power running through the weld
Interesting. I'm using a professional Sunstone engineering welder and it sticks a lot with normal copper electrodes. With the special electrodes (I think they have aluminum oxide in the copper) they stick less but still its not good. For me i find if I move the electrodes immediately after firing the weld I don't get much sticking. What kind of electrodes did you use? Do you see any copper left behind on any of your spot welds?
I had no sticking issues. The tips i used were off my dn-5 welder. They are copper. I have made some other DIY tips out of 6mm 99%pure copper rod and they seem fine as well, althought i only tested those with around 20 welds
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redilast   1 kW

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Re: Qulbix Q76R 18650 battery build

Post by redilast » Jun 25 2016 6:53am

Quokka wrote:I had no sticking issues. The tips i used were off my dn-5 welder. They are copper. I have made some other DIY tips out of 6mm 99%pure copper rod and they seem fine as well, althought i only tested those with around 20 welds
Hard to figure. I get no sticking with nickel plated steel. But pure nickel is where I have problems.

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Re: Qulbix Q76R 18650 battery build

Post by Ohbse » Jun 25 2016 7:39pm

Awesome pack build, very impressive! Mind sharing your source for the nickel sheet?

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Quokka   1 kW

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Re: Qulbix Q76R 18650 battery build

Post by Quokka » Jun 26 2016 7:01am

Ohbse wrote:Awesome pack build, very impressive! Mind sharing your source for the nickel sheet?
Aliexpress. Found it by searching nickel sheet. The store name is "Sophias's wholesale titanium, nickel and tantalum. It passed the obligatory salt water/ filed test to check it was nickel coated steel
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Mammalian04   100 kW

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Re: Qulbix Q76R 18650 battery build

Post by Mammalian04 » Jul 20 2016 1:50am

Quokka wrote:
Ohbse wrote:Awesome pack build, very impressive! Mind sharing your source for the nickel sheet?
Aliexpress. Found it by searching nickel sheet. The store name is "Sophias's wholesale titanium, nickel and tantalum. It passed the obligatory salt water/ filed test to check it was nickel coated steel

Does this price sound right?

Weight :1.43kg for 4 meters of this nickel sheet (0.2 x 200mm x 4000mm)
$158.30 + $67 shipping to U.S.

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Quokka   1 kW

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Re: Qulbix Q76R 18650 battery build

Post by Quokka » Jul 20 2016 2:43am

Thats a great price. I paid 138.88 for 1.5m x0.2m
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Mammalian04   100 kW

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Re: Qulbix Q76R 18650 battery build

Post by Mammalian04 » Jul 20 2016 8:43am

Thanks Quokka.

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skeetab5780   10 MW

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Re: Qulbix Q76R 18650 battery build

Post by skeetab5780 » Jul 20 2016 11:21am

Great battery build! Everybody likes a tight fit! I need to seriously invest in a DIY spot welder setup to someday be able to do something similar... Thanks for sharing the build.

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Re: Qulbix Q76R 18650 battery build

Post by Tats » Aug 24 2016 4:18am

I can confirm quokkas 20s pack with Max-e and qs is a lot quicker than my 36v 25a peak bbs01 assisted 48 yr old legs :( I'm knackered....nice bike mate-looks even better in the flesh

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Quokka   1 kW

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Re: Qulbix Q76R 18650 battery build

Post by Quokka » Aug 24 2016 4:53am

Would it make you feel better if i told you i was only running 40 amps past you lol- with a half charged battery. In boost mode it pumps out 120 8) and is pretty frieghtening to be on. I am getting a range of 120km at 40-50km average
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Wheazel   10 kW

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Re: Qulbix Q76R 18650 battery build

Post by Wheazel » Aug 24 2016 7:30am

:lol:
Tats wrote:I can confirm quokkas 20s pack with Max-e and qs is a lot quicker than my 36v 25a peak bbs01 assisted 48 yr old legs :( I'm knackered....nice bike mate-looks even better in the flesh

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Re: Qulbix Q76R 18650 battery build

Post by Tats » Aug 24 2016 7:31am

Nope.

Seriously tho it looks beautiful and is really stealthy quiet too. When you passed me I didn't hear you at all.

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Compoundbike   10 W

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Re: Qulbix Q76R 18650 battery build

Post by Compoundbike » Oct 27 2019 7:17am

Cool stuff with the battery.. i wish i knew this is earlier. My range with 8Parallel is only 20km. :bigthumb:

But im rebuilding the battery.

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Merlin   10 MW

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Re: Qulbix Q76R 18650 battery build

Post by Merlin » Oct 27 2019 3:26pm

topic is 3 years old :D

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