I wanted to compare two batteries, 60v vs 72v by comparing their Wh, but I noticed that with 72v/20s it's 3.6*20=72v, unlike the 60v>3.6*16=57.6v .. so what's the right way to compare the Wh between 72v/20ah and 60v/20ah batteries, should it be 60v*20ah or 57.6v*20ah?
Why 60v batteries aren't labeled as 57.6V(3.6*16) ?
- Thread starter kgff
- Start date
ZeroEm
1 MW
Don't get hung up on the advertising numbers. Like 48v batteries 13*3.6v = 46.8v. They would call it 3.7v just to make the numbers look better.
No battery will have what is advertise unless lucky.
You figured it out 57.6v. Remember they many not have the full 20ah. some 18ah and other maybe 19ah.
Don't even need math. the higher voltage batteries will have more watts if the ah is the same.
The trick it to get a battery that discharges more continuous amps than you need. The slower you drain a battery the more usable watts you get. A smaller batter does not just have less watts, they are drained at a faster rate and you can not even get the same percentage of watts.
No battery will have what is advertise unless lucky.
You figured it out 57.6v. Remember they many not have the full 20ah. some 18ah and other maybe 19ah.
Don't even need math. the higher voltage batteries will have more watts if the ah is the same.
The trick it to get a battery that discharges more continuous amps than you need. The slower you drain a battery the more usable watts you get. A smaller batter does not just have less watts, they are drained at a faster rate and you can not even get the same percentage of watts.
14S ebike batteries were initially called 50V, but several other retailers began calling their 14S packs 52V, and that seems to have "stuck".
That being said, EGO yard tools calls their 14S packs 56V, and Echo calls their 14S packs 58V.
DeWalt calls their 15S packs 60V, even though many ebike companies call 16S a 60V pack.
That being said, EGO yard tools calls their 14S packs 56V, and Echo calls their 14S packs 58V.
DeWalt calls their 15S packs 60V, even though many ebike companies call 16S a 60V pack.
markz
100 TW
Some brands call their packs 18V others 20V
Nominal voltage is just a shorthand label.
In theory the 50% SoC voltage isolated and at rest, then rounded to a whole number for packs, one significant digit for cells.
Li-ion can use either 3.6 or 3.7V not any technical significance more marketing usually.
60V happens to be a multiple of 12V.
To get there with li-ion is 16S
at 3.6V only 57.6, use 3.7V get 59.2V
actual range is 48V for 0% if you use 3V
charge at 65-67V depending how you value longevity
In theory the 50% SoC voltage isolated and at rest, then rounded to a whole number for packs, one significant digit for cells.
Li-ion can use either 3.6 or 3.7V not any technical significance more marketing usually.
60V happens to be a multiple of 12V.
To get there with li-ion is 16S
at 3.6V only 57.6, use 3.7V get 59.2V
actual range is 48V for 0% if you use 3V
charge at 65-67V depending how you value longevity
thanks for the answers everybody!
