How fast can you charge the battery?

MarkF

Active Member
And yet they sell a charger that goes to 8 amps to anybody that wants to buy it, juice even sells it for all there bikes. Where's the BMS you talk about Thomas that can't be charged to 8 amps. Why does Luna sell a higher amp charger, if it can't be done because your going to fry your BMS. Show me 1 BMS that will fry if you use a Satiator at 8 amps. Do you think they would even sell a charger that goes that high if it even fried 1 BMS on the market. If your BMS limits the charge to say 5 amps then it still will not hurt to use an 8 amp charger would it since your BMS would be governing the charge rate. Keep your insults to yourself Thomas and try to refrain from spreading false information on batteries. If 1c is a safe charge rate and 8 amps is less then 1C on a battery pack, then 8 amps is a safe charge rate. Do your math before insulting me.
 

Thomas Jaszewski

Well-Known Member
Keep your insults to yourself Thomas
Nsults, yikes my friend, where are there insults? Suggesting customers use parameters outside of a products recommended specifications is something a seller just can’t do.
Why does Luna sell a higher amp charger,
Because their BMS is capable.
Do you think they would even sell a charger that goes that high if it even fried 1 BMS on the market.
my Satiator can charge a 48v battery, but I wouldn’t use the 52v option.
it still will not hurt to use an 8 amp charger would it since your BMS would be governing the charge rate.
Seriously? You trust cheap Chinese BMS to protect you.
Where's the BMS you talk about Thomas that can't be charged to 8 amps.
Nearly every BMS I own has a 4-5A limit in the specifications. Battery university and others address the advantages and disadvantages of faster charges. The average Joe here will prolong battery life and increase cycles by charging at lower rates. Clearly Juiced reccomends NOT charging at 8A, and specs only suggest 52v batteries be charged at 8A. “But not recommended”.

I don’t agree, however my intent was not to insult. If you read my comments as an insult, I owe you an apology. And I do apologize.
 

Thomas Jaszewski

Well-Known Member
From your charger seller,

BMS Limits and charging fast:
Commercially sold ebike batteries such as the Luna Cycle packs have some kind of BMS (battery management system) that protects the pack. One of the things the BMS does is limits how fast the pack is allowed to charge. If you plug a 10-Ah battery into a 5-amp charger, and the battery does not charge, the BMS might be refusing the charge.

Most lithium BMS’s have a limit of around 7 amps as the limit on how fast they will charge. Also, the BMS is in charge of balance chargingyour cells to further ensure you packs safety and longevity.
 

ctbaz

New Member
I set my satiator to charge my 52V pack to 85% (~56.3V) and am noticing when I put the battery into my bike, the bike is reading the voltage at 55.4. Anyone else have this issue where the satiator and your bike aren't reading the same voltages?
 

Gfmucci

Member
Having used a number of different lithium batteries and chargers, my basic understanding is "speed kills". Not necessarily instantly but sooner than consistent slow charging would. Sure, you can occasionally charge at a 6 or 8 amp rate on some systems, and the higher capacity chargers allow that safely with the right battery. And some of us might occasionally need a quicker than usual charge. So it's there for the times its needed. But as a routine, I understand that the slower the charge rate, the better it is for the life of the battery. And the less often you take advantage of the max charge rate, the better.
 

Thomas Jaszewski

Well-Known Member
I set my satiator to charge my 52V pack to 85% (~56.3V) and am noticing when I put the battery into my bike, the bike is reading the voltage at 55.4. Anyone else have this issue where the satiator and your bike aren't reading the same voltages?
Not at all unusual. I use a good quality multimeter to check voltage. I find that my Satiators are more accurate than my displays. That said I wouldn't worry too much or dwell and the small difference.
 

Timpo

Well-Known Member
Not at all unusual. I use a good quality multimeter to check voltage. I find that my Satiators are more accurate than my displays. That said I wouldn't worry too much or dwell and the small difference.
But if the charger (satiator or not) doesn't know how to read the voltage properly, doesn't that mean it could potentially overcharge the battery?
 

Thomas Jaszewski

Well-Known Member
Interesting to see Apple include a new battery optimization feature in the forthcoming iOS 13. By analyzing usage patterns, the battery is charged to about 80% capacity, and then by learning use patterns, is topped off before the device is likely to be used.

https://www.macrumors.com/2019/06/05/ios-13-optimized-battery-charging/

George
Bluetooth features are slowly coming into use with battery pack BMS. Hopefully more features similar to Apples battery management will come into the market.