I'm using between four and seven of these on my bike depending on the configuration I'm trying at the time. I really like the idea of being able to add more packs as needed.
So far, the batteries seem seem to work well. The obvious limitation is that they are 36V. I'm using a DC-DC boost converter to boost the voltage from 36v nominal to 54v. This drives a watt 48v hub motor. The controller is rated 13A , but has 26A maximum draw. I had to dial back amperage it would draw to 80% using the LCD display in order to keep the system from cutting out at full throttle. Nonetheless, my power monitor shows that the system pulls a max of 35A and watts from the battery when measured on the battery side of the booster. When measuring on the boosed motor side, the max amperage is around 22A with a peak wattage of about . The wattage difference reflects a loss of about 6% under peak demands.
With five of these charged to 41V, I'm able to round trip to work and back a distance of 32 miles over moderately hilly terrain. I pedal assist and typically cruise at about 20mph.
I'm currently trying different configurations and speeds to get a better handle on how much usable power I can get per pack. I'd like to hit an average cruising speed closer to 25mph. Right now my impression is that these packs don't perform well once they drop below about 36V. So that means that drawing that last 30-40% of power from them might be an issue for what I'm doing, which includes climbing hills when the batteries are discharged to well below the halfway mark. But I'm not yet sure if that's a fault of the battery, or if maybe the low voltage cut-toff of the battery booster is kicking in. I'm also not trusting my power meter 100%. I hope to sort this out this week.
BTW, I can confirm that the BMS on these packs will protect the pack voltage from dropping below 28V. That's slightly above the LG recommended minimum voltage. With a constant draw of about 35 watts, they do deliver their full capacity.
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