T
treez
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![Newbie level 1](/styles/images/ranks/alevel1.gif)
Hello,
What is the maximum current that you can charge a 5A.hr, 12V lead acid battery with?
Unfortunately, they wont give the battery datasheet out.
They have asked us to put the battery across the output rails of a 14.4V, 300W Full bridge SMPS, and said that we should just let the battery charge from that. They said we should just make the Full bridge output current limit at 20 Amps. (ie, let the output voltage fall to whatever it falls to as long as it gives a maximum of 20 Amps out)
However, we are worried that allowing 20 Amps to flow into a 5A.h Lead acid battery may overheat it.
We offered them to use a charger, from the full bridge output to the battery, but they said don’t bother.
The battery is the starter battery of an Electric car. (ie the one that switches the contactors that connect the high voltage battery to the motor to make it start)
What is the maximum current that you can charge a 5A.hr, 12V lead acid battery with?
Unfortunately, they wont give the battery datasheet out.
They have asked us to put the battery across the output rails of a 14.4V, 300W Full bridge SMPS, and said that we should just let the battery charge from that. They said we should just make the Full bridge output current limit at 20 Amps. (ie, let the output voltage fall to whatever it falls to as long as it gives a maximum of 20 Amps out)
However, we are worried that allowing 20 Amps to flow into a 5A.h Lead acid battery may overheat it.
We offered them to use a charger, from the full bridge output to the battery, but they said don’t bother.
The battery is the starter battery of an Electric car. (ie the one that switches the contactors that connect the high voltage battery to the motor to make it start)