Other Parts Discussed in Thread: EV2400, , , BQSTUDIO
Hello TI,
I am using BQ28Z610EVM-532, EV2400 for evaluation a Battery pack.
Parameters of the battery pack:
Nominal voltage- 7.4V
Charging voltage- 8.4V
Capacity 1200mAh
The battery pack has inbuilt short circuit protection( charg FET & discharg FET), with two LI UF553450Z cells connected in series like the picture below shows. It has only 3 battery connections which are PACK+, PACK-, TH for temperature mesure.
Physical connection on EMV board:
1.Pack+ connected to 2P
2.Pack- connected to 1N
3. Nothing connected to 1P
The bq28z610 can be well detected by BqStudio. When a resistor connected to PACK+ & PACK- on the EMV board, it also shows the state "Discharging" and the discharging current can also be read. However, the remaining capacity and Full Charge capacity are always 0 with "Relative state of charge" be 100% all the time during charging or discharging.
The configurations on the BQStudio:
1) DA bit 0 is set to 1 ( otherwise the voltage will drop to 3.7 which is voltage of one cell)
2) Gas Gauging configuration:
Could the EMV board be used with a battery pack like this?( only two connections ) Since I cannot connect from battery pack to 1P on the EMV board, do I need to short it to 2P and pretend it's a one-cell pack? How should I configure the software properly to read the capacity and state of charge?
Thanks for your reply in advance
Kind regards,
Dian