How to charge a battery?

[lionelgreenstreet]

Hi,
i want to realize a circuit able to charge a lead-acid battery, but i
have some questions about:
1. Charging process is composed by three phases: Bulk charge (constant-
current phase), Absorption (constant-voltage phase), Float or trikle
charge....the last one is constant current or constant voltage?
2. What are the maximum and minimum C-rate for these phases? For
example, i've read that in bulk charge phase the maximum current
should be C/10..so, if i have a 50Ah battery maximum current should be
50/10=5A, right?
3. To calculate the state of charge, i need to know battery voltage
and battery current on a known load?
Thanks

[Daku]

There is a cell current/voltage versus time curve for the
charging process that clearly explains the entire sequence
of steps. I could send it to you if you so wish.

On Feb 4, 12:12 pm, lionelgreenstreet <lionelgreenstr...@gmail.com>
wrote:

[lionelgreenstreet]

On 5 Feb, 05:27, Daku <dakup...@gmail.com> wrote:
> There is a cell current/voltage versus time curve for the
> charging process that clearly explains the entire sequence
> of steps. I could send it to you if you so wish.

Ok, thank you so much

[Tim Wescott]

http://batteryuniversity.com/learn/article/charging_the_lead_acid_battery

There's a few book out there, too, that give good background material.

--
My liberal friends think I'm a conservative kook.
My conservative friends think I'm a liberal kook.
Why am I not happy that they have found common ground?

Tim Wescott, Communications, Control, Circuits & Software
http://www.wescottdesign.com