Other Parts Discussed in Thread: GPCCHEM
We have been developing a prototype system and have been struggling with the SOC readings on our BQ34Z100-G1.
It is difficult to see the value add of this chip and we are thinking that perhaps it was not a good choice for our application.
We are working with 3 lead acid batteries in series. The batteries are meant to operate as a UPS. When we lose power, they kick in.
We use the fuel gauge chip to check the health and welfare of the batteries. If the SOC is too low, we shut down the system.
The SOC readings from the fuel gauge chip are very flakey. Starting with a fully charged battery, we see the SOC number @100%.
We then run the system off of battery for a period of time.
The SOC slowly decreases as we would expect.
When it gets about 90% SOC we power off and then power back on (sending a reset to the fuel gauge). We now read back an SOC of either 0% or 100%
In a separate experiment we do the same thing - battery At 90% and we send a reset. It will now read 100%
I would expect a more accurate SOC. Where did we go wrong?
Thanks!
