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Battery Management - Chargers Forum
bq24450 as a battery charger
Hi I have plan to build a SLA batteries where in put current is quite random range from 0V to 40v.
I can not calculate the value of the External Components(Resistor and Transistor).
Input Power generator "Wind Turbine"
Maximum power: 200 Watt.
Maximum Volt: ~ 36 Volt. (I have modified the generator :) ).
Minimum Volt: ~ 0 Volt (Most of the time its yields lower volt.....0volt to ~ 11volt where current varies from 0 amp to ~5 amp).
Planed SLA Batteries are:
1. SLA 12V 7AH.
2. SLA 12V 10AH.
3. SLA 12V 17AH.
Any help(Hints how to deals with this IC) will be appreciated.
The bq24450 is a linear charger and it seems that the power is too high for a linear charger.
You also need input voltage regulation (Vin-DPM) which allows the converter to load the input until the input drops to the input DPM threshold and then regulate there delivering maximum power.
This is basically made for a Li-Ion cell but the same CC and CV can be used to charge a lead acid battery. I would use an external circuit or micro processor to terminate the charge once the output votlage got to the bulk voltage and then restart once the pack dropped to the float voltage.
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