Your thoughts and suggestions for this

[harryS]

It's the dreaded Unit Pack Power, but it is either Samsung/LG cells. And I beleive the price is in line with name brand cells. Per reviews I've seen of that style "case" on amazon, the straps tend to break off from the weight.

U004 48V 28AH BMS60A Samsung 3500mAh / LG 3500mAh cells Triangle Ebike battery fit for 0-2000W motor with 4A charger/ ship from China

This Item Can ship to most country. can be customized.

www.uppbattery.com

 

[tomjasz]

It's the dreaded Unit Pack Power

UPP CAN build a good battery. But it's a custom order. I have a new one I'm pleased with. 35E cells opened and confirmed. Balance BMS, temperature monitoring, pure nickel connectors, and cell separation. BUT, a $450 36V battery.

I wanted it fast and a specific case that EM3ev doesn't build with and Jenny Mao and her group it turns out uses nickel-coated steel and think steel coated with nickel is just fine.

 

[tomjasz]

BTW virtually every ride I take from home reaches speeds at least to mid 30s mph downhill coasting and I have absolutely no problems with rim brakes using pads purchased on Amazon for <$10 for 3 sets.

Test panic stops distances. THAT for me is critical. Money for industry-standard batteries and decent brakes is less than a day in the emergency room. No ill will intended. Again, I've come to appreciate what a committed rider and builder you are. I just think we should be careful as to what we suggest n00bs do. Let them decide after having both sides of the argument(discussion).

 

[Nvreloader]

OK Guys
I am looking for the required/mandatory spec's to have my battery built,
so I can compare costs etc, for these 2 battery builders, UPP and EM3 EV.

Some of the questions I have are this:
Which of the below spec's are REQUIRED for a good battery build.
(I know nothing about building a battery, or what is required.)

80? cells, 21700 cells equal to 2 - OEM battery's,
( MY OEM LG 21700 battery has 39 cells/13 in series, 3 in parallel, 15ah/720wh x 2 battery's.)
48 or 52V with a quality 30/40/50A BMS? (OEM is 30A)
Quality of the BMS?
Advanced BMS System?
Balance BMS?
Intelligent Dual Battery Balancing Module?

Case/construction methods ? A triangle case with these maximum dimensions =
431mm x 457mm x177mm x 88mm thick/wide. Hard or soft shell construction?

Proper cell connections/ What type?
Is there any cell protection fusing?
Cell separation type?
Temperature monitoring?
Pure Nickel/Brass/Copper connectors ?

What else should I ask about/for?
Your thoughts and suggestion...
Thank you,
Don

 

[Nvreloader]

What?
No one is going to offer any help or information on the items/spec's that would be needed for a good battery build, I am planning on buying?