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52v Vruzend Bsttery pack  

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phampton
Street cred = 10 mAh
Joined:5 months  ago
Posts: 3
25/11/2017 1:59 pm  

Built a Vruzend battery from Samsung 3000mah cells from Ryobi power tool batteries. 13 x 8. All went well, all batteries had proper voltage, pack had 50+ charged volts. It replaced an original ebike battery that had lost it's ability to be charged fully. However when I ride the bike it seems to cause the controller to shut off while going up hills and comes back on again 4 seconds later.  My original battery, even with it's reduced mileage production doesn't do that.  Any suggestions what might cause this?


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Micah (Vruzend Rep)
Street cred = 1 Ah Admin
Joined:9 months  ago
Posts: 243
27/11/2017 7:29 pm  

It sounds like the BMS is undergoing a protection cut out temporarily. It could be caused by a few different reasons, but the most likely culprit is that the voltage is sagging and tripping the low voltage cutoff. This can be caused by a few different reasons as well. A common one is current bottle necks, such as drawing the power at the + and - battery terminals from just one point instead of all of the cells at the + and - terminal of the battery. Another common one is using too few parallel cells meaning there isn't enough to support the current required.


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