Custom ordered 72V25Ah pack for Qulbix Q76R, NOT recomended

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Bbeforeart   10 mW

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Custom ordered 72V25Ah pack for Qulbix Q76R, NOT recomended

Post by Bbeforeart » Dec 27 2017 10:32am

I have to point out to NOT buy batteries from ''French****'' (who is also member of ES using this name)
From last spring till summer, I've been working on my DIY Qulbix Raptor Q76R bike. A (very) long time I'd spend time looking for the right battery, in terms of voltage, capacity, weight, durability, but especially dimensions. ''French****'' contacted me with having a 60v battery for me. I replied: the voltage is too low, and I need accurate dimensions for my frame. He replied: all right; send me the dimensions and your type of cells and I'll make sure you'll have this custom build battery in time.

HOWEVER: his (after sales) service is absolutely bad. He will not comply with the given warranty (ONLY 1 YEAR!)


Specifications:
Panasonic 2800mAh endurance batteries, cycle life: approx 1000 cycles
Pack contains: 20S8P
Weight: 9.1KG

Check the pictures underneeth here of the whole pack.
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Last edited by Bbeforeart on Oct 01 2018 3:31pm, edited 1 time in total.

alswiseowl   100 W

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Re: Custom ordered 72V25Ah pack for Qulbix Q76R, recommended

Post by alswiseowl » Dec 29 2017 11:00pm

nice

999zip999   100 GW

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Re: Custom ordered 72V25Ah pack for Qulbix Q76R, recommended

Post by 999zip999 » Dec 31 2017 11:18pm

How much ?

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Bbeforeart   10 mW

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Re: Custom ordered 72V25Ah pack for Qulbix Q76R, recommended

Post by Bbeforeart » Oct 01 2018 3:05pm

I've paid €925 inc. charger, ex shipping for this pack. shipping within Europe is approx €50

Regards

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Bbeforeart   10 mW

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Re: Custom ordered 72V25Ah pack for Qulbix Q76R, NOT recomended

Post by Bbeforeart » Oct 01 2018 3:32pm

This post was edited after experiencing problems with the seller. Please do not buy from him, as his service is VERY BAD.

dustNbone   10 kW

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Re: Custom ordered 72V25Ah pack for Qulbix Q76R, NOT recomended

Post by dustNbone » Oct 01 2018 3:59pm

What specifically was the problem? Just telling us not to buy from them isn't really enough to make an informed buying decision.

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eee291   10 kW

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Re: Custom ordered 72V25Ah pack for Qulbix Q76R, NOT recomended

Post by eee291 » Oct 01 2018 4:51pm

The high price for one. I could build that same pack for less, without having Chinese labor involved.

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Bbeforeart   10 mW

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Re: Custom ordered 72V25Ah pack for Qulbix Q76R, NOT recomended

Post by Bbeforeart » Oct 05 2018 2:19pm

The problem is that, whenever load is applied, the voltage sags very quickly from 83v (full charge) to 1.3v. after a few secs it returns to ~73v. Once I connect it to the charger again it pops up back to 83v. I've also applied load with the charger connected, again, without results. No damage was done to the pack, so it seems like an electronic error, probably the BMS or so.

any ideas?

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eee291   10 kW

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Re: Custom ordered 72V25Ah pack for Qulbix Q76R, NOT recomended

Post by eee291 » Oct 05 2018 2:54pm

It could be some bad welds that have come off the Cells which are causing the BMS to misbehave.

The only sure way is to open the pack and measure each cell row directly and via the balance wires for any inconsistencies.
Also, inspect the welds.


If you don't want to risk it or whatever I wouldn't mind taking a look at it for you if you are willing. I also have a few 20S BMS.

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Bbeforeart   10 mW

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Re: Custom ordered 72V25Ah pack for Qulbix Q76R, NOT recomended

Post by Bbeforeart » Oct 12 2018 1:50am

Dear eee

Thanks for the reply,

I also had that in mind, seems logical!

It's great you want to help me out, I will come back to your offer shortly ;)

Have a nice weekend!

Bart

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