Battery Bible

[Sunking]

I have a question:
Please take a look at the attached chart:
It is from the following link: http://www.kemapower.com/display.asp?id=666
1. What is CA ?? What is the meaning of 1CA, 0.1CA, 10CA ??

2. What is the meaning of the end of the line ??
Is it the point of 100% Discharge ??
for example at 0.1CA the line ends after 10 hours at 11.0[Volt]
Thanks
Solarwatt

CA = Charge Amps or Discharge Amps where C = the battery Amp Hour rating.

For example if you have a 100 AH battery and charge at 10C means 1000 amps.

[SolarWatt]

OK...
And I guess the end of the line means DOD=100%
Correct ??

It is interesting to see that the line of 0.1CA ends little before 10Hours. --> 0.1CA[Amp] x 10[Hours] = 1CA[A-H]
but the line of 1CA ends at 40minutes --> 1CA[Amp] x (40/60)[Hours] = 0.66CA [A-H]

And it is getting worse as the CA goes higher.
Also the voltage is lower at higher currents because of the internal resistance.
OK I got it....

Thanks Sunking.... the battery magician..

SolarWatt

[Sunking]

OK...
And I guess the end of the line means DOD=100%
Correct ??

Correct

It is interesting to see that the line of 0.1CA ends little before 10Hours. --> 0.1CA[Amp] x 10[Hours] = 1CA[A-H]
but the line of 1CA ends at 40minutes --> 1CA[Amp] x (40/60)[Hours] = 0.66CA [A-H]

And it is getting worse as the CA goes higher.

That is Peukert Law at work. When a battery is specified it is typically specified at the 20 hour discharge rate. So for example if you have a 100 AH battery means you can draw 100 AH / 20 H = 5 amps for 20 hours. However take that same battery and out a 2 (50 amps) hour discharge on it, and the battery is now a 45 AH battery. On the flip side take the same battery and take a 100 hour (1 amp) discharge on it and it is now a 150 AH battery.

[loreoff]

links dead

link is 404

[russ]

link is 404

The post is near 2 years old

[Mike90250]

found the 3rd ed

http://www.etf.unssa.rs.ba/~slubura/diplomski_radovi/Zavrsni_rad_MarkoSilj/Literatura/Handbook%20Of%20Batteries%203rd%20Edition.pdf

Linden's Handbook of Batteries, Fourth Edition

the desired 4th can't be too far away - still looking
could be here, or it could be a wumpus http://ge.tt/4cyAIYe/v/4D1
is there a wumpus here ? https://docs.com/13K8U