I have a thunderstruck kit also but using the dilithium display.? I have a current sensor on the main battery cable that the display uses to "count coulombs" and estimate SOC.? If you have lithium batteries it's probably a similar setup for you as you can't really measure SOC very well from voltage because of the flat lithium discharge curve.? You should see a toroidal device around one of your cables very close to the battery.
Is there a shunt sensor on the negative terminal of the battery??? It would need that to be able to count amp-hours.
On 2024-06-20 12:04 pm, SVTwister wrote:
Hi Everyone,
I have a Thunderstruck 10 kW kit with a Curtis AC F4-A controller and a Curtis 3140 display. The display shows BDI (battery discharge indicator, which I guess is the same as State Of? Charge), battery voltage, current, rpm, motor temp, and controller temp--one at a time. There is a button to toggle between the different data. How does the controller calculate State Of Charge for the battery? Is it based on battery voltage or is it counting amp-hours?
Cheers,
Lars
