The charger won't know about the voltage drop, it would just reduce the
CV voltage by 0.7V or so
The bigger problem is the charger may not start, if there's no voltage
present on it's output.
On 21/03/2022 8:11 am, Alan Arrison via EV wrote:
Wouldn't the voltage drop confuse the charger, especially when it gets
to the constant voltage point near end of charge?
Al
On 3/20/2022 4:52 PM, David Nelson via EV wrote:
Hi,
I'm replacing the T-875 battery pack in a golf cart with a 48V Dakota
Lithium LiFePO4 battery. I also ordered their 15A charger to make sure
it would play nice with the builtin BMS. I was very frustrated and
disappointed to discover that this charger puts a continuous 0.12A
drain on the battery when the charger is not plugged in. This golf
cart is sometimes parked for a few months during the winter and I
don't want the charger running the battery flat. I'm also trying to
make this as user friendly as possible since the T-875 pack didn't
last very long due to no care of the pack.
I first thought that I could install a NO relay with an AC coil which
would close when the AC cord was plugged in and so ordered one. Then I
thought I better see if there is any arcing when connecting the
charger to the battery pack. Yep. There is a nice pop when connecting
the charger so a relay/contactor would not last very long with that.
So I decided to find a diode which I could use but I'm not having luck
in finding something since I don't know exactly what parameters I need
to search with. Does anyone with more EE knowledge than me have a
recommendation? I do have room just above the motor area and beside
the controller to mount something to the frame. A recommended
heatsink, if needed, would be helpful, too.
Thank you,
David D. Nelson
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