what does that data mean?

[izeman]

hi

i found that battery data in a webshop, and maybe they are wrong, or i have totally misunderstand some basics:

3.2V 20AH LiFePO4 Polymer Battery Cell
Specification
NO. Item Specification
1 Nominal capacity 20 Ah@ 0.3C5A（6000mA）
2 Nominal voltage 3.2 V
3 Impedance <5 mΩ
4 Charge cut-off voltage 3.65 V
5 Charge current Standard charge：0.3C5A
1C5A Rapid charge： 1C5A
6 Standard Charging method 0.3C5A constant current（CC）charge to 3.65V，then
constant voltage 3.65V（CV）charge till charge current
decline to≤0.02C5A
7 Charging time Standard charge：5.0h（reference）
Rapid charge：3.0h（reference）
8 Max. discharge current 1.0 C5A
9 Max instant discharge current 3.0 C5A
10 Discharge cut-off voltage 2.0 V
11 Operating temperature Charge：0°C ~ 45°C
Discharge：-20°C ~ 60°C
12 Storage temperature -10°C ~ 45°C
13 Storage humidity ＜85﹪
14 Cell Weight Approx：560 g

this claims to be a 20ah prismatic LiFePo4 cell.

first riddle:
20 Ah@ 0.3C5A（6000mA）

now what? 20Ah? only at 5A discharge? or 6A discharge? How much at:

Max. discharge current 1.0 C5A
1C = 20A or 0.25C = 5A ????

if so, what would that mean:

Max instant discharge current 3.0 C5A
so 3C is 5A as well? if that is the case then battery only has 1.700mah?

Charge current Standard charge：0.3C5A
but standard charging time is 5.0h? this should be 3 hours @0.3c or 4 hours @5a, but never ever 5 hours.

questions over questions. please someone enlight me ...

ps: this topic is a bit sarcastic. i don't really think that someone could make some real sense out of that data

 

[Ypedal]

all this means nothing without a link :wink:

most specs are completely false, while others are just badly translated..

 

[izeman]

all this means nothing without a link :wink:

yep. they forbid right-click on their website, so i had to type the link by hand:
http://ebike-bmsbattery.com/dispro.php?id=95

 

[parabellum]

yep. they forbid right-click on their website, so i had to type the link by hand:

Next time try Ctrl+C (or combination used in your language)

P.S. Nonsensical specs.

 

[izeman]

yep. they forbid right-click on their website, so i had to type the link by hand:

Next time try Ctrl+C (or combination used in your language)

go ahead and try. this is php, so no link shown for any individual subpage.

 

[izeman]

Nonsensical specs.

ok. so it's not me who has turned nuts and forgot all ever learned about C-rates and stuff

 

[parabellum]

go ahead and try. this is php, so no link shown for any individual subpage.

Ohhh, you are about linked address, me think about content. No key comb for that.

 

[Hillhater]

they forbid right-click on their website, so i had to type the link by hand:

Not when i tried ..this using right click .. ???


3.2V 20AH LiFePO4 Polymer Battery Cell

Dimension
Model Thickness Width Length Tab width
GPLFP70173248 7.2 174 248 50
GPLFP11198141 11.5 198.5 141.5 50


Specification
NO. Item Specification
1 Nominal capacity 20 Ah@ 0.3C5A（6000mA）
2 Nominal voltage 3.2 V
3 Impedance <5 mΩ
4 Charge cut-off voltage 3.65 V
5 Charge current Standard charge：0.3C5A
1C5A Rapid charge： 1C5A
6 Standard Charging method 0.3C5A constant current（CC）charge to 3.65V，then
constant voltage 3.65V（CV）charge till charge current
decline to≤0.02C5A
7 Charging time Standard charge：5.0h（reference）
Rapid charge：3.0h（reference）
8 Max. discharge current 1.0 C5A
9 Max instant discharge current 3.0 C5A
10 Discharge cut-off voltage 2.0 V
11 Operating temperature Charge：0°C ~ 45°C
Discharge：-20°C ~ 60°C
12 Storage temperature -10°C ~ 45°C
13 Storage humidity ＜85﹪
14 Cell Weight Approx：560 g