Other Parts Discussed in Thread: BQ76952
Tool/software:
Dear support team,
I am currently using the BQ76952 Evaluation Module as a prototype. I have connected three cells (cell 1, 2, and 16) to the test board. I configured the register 0x9304 (Settings: Configuration: Vcell Mode) with the value 0x8003, and register 0x9335 (Settings: Cell Balancing Config: Balancing Configuration) with 0x03. Additionally, I set register 0x933B (Settings: Cell Balancing Config: Cell Balance Min Cell V (Charge)) to 3000.
The BQ76952 correctly measures all voltages, and no protections are active. The pack is connected to a 12.3V supply at PACK+ and PACK-. Here are some measurement details:
876525: measurements 1 timestamp: 876430
876525: cell1 voltage...........: 3252 mV
876525: cell2 voltage...........: 3674 mV
876525: cell3 voltage...........: 0 mV
876525: cell4 voltage...........: 0 mV
876525: cell5 voltage...........: 0 mV
876525: cell6 voltage...........: 0 mV
876526: cell7 voltage...........: 0 mV
876526: cell8 voltage...........: 0 mV
876526: cell9 voltage...........: 0 mV
876526: cell10 voltage...........: 0 mV
876526: cell11 voltage...........: 0 mV
876526: cell12 voltage...........: 0 mV
876526: cell13 voltage...........: 0 mV
876526: cell14 voltage...........: 0 mV
876526: cell15 voltage...........: 0 mV
876526: cell16 voltage...........: 3692 mV
876527: cell1 current...........: -32 mA
876527: cell2 current...........: -24 mA
876527: cell3 current...........: -17 mA
876527: cell4 current...........: -17 mA
876527: cell5 current...........: -34 mA
876527: cell6 current...........: -18 mA
876527: cell7 current...........: -26 mA
876527: cell8 current...........: -25 mA
876527: cell9 current...........: -26 mA
876527: cell10 current...........: -26 mA
876528: cell11 current...........: -32 mA
876528: cell12 current...........: -33 mA
876528: cell13 current...........: -24 mA
876528: cell14 current...........: -26 mA
876528: cell15 current...........: -24 mA
876528: cell16 current...........: -21 mA
876529: vreg18...................: 29312
876529: vss......................: 6
876529: max cell voltage.........: 3693 mV
876529: min cell voltage.........: 3253 mV
876529: battery voltage sum......: 10.621 V
876530: fet temperature..........: 26 C
876530: avg cell temperature.....: 25 C
876530: max cell temperature.....: 25.6 C
876530: min cell temperature.....: 25.6 C
876530: internal temperature.....: 26.9 C
876530: ts1 temperature..........: 25.6 C
876530: ts3 temperature..........: 26.0 C
876530: cc3 current(average).....: -30 mA
876530: cc1 current..............: -22 mA
876531: cc2 current..............: -31 mA
876531: cc3 current..............: -25 mA
876531: accumulated charge.......: -6.3317688703 mAh, time: 870 s
876531: balancing bit mask.......: 0x0000
876531: manufacturing status.....: 0x40
876531: measurements 2 timestamp.: 876351
876531: stack voltage............: 10.627 V
876531: pack voltage.............: 12.78 V
876531: ld voltage...............: 12.193 V
877725: The DDSG pin is asserted
877725: The DCHG pin is asserted
877725: The PDSG FET is off
877725: The DSG FET is off
877725: The PCHG FET is off
877725: The CHG FET is off
877725: Device is in FULLACCESS mode
877726: Writes to OTP are blocked
However, I am experiencing issues with automatic charging and balancing. While I can manually enable charging using the command FET_ENABLE(), and I can activate balancing with CB_ACTIVE_CELLS(), the automatic control does not seem to work as expected.
Could you please advise why the automatic charging and balancing are not functioning? Are there additional settings or configurations I should check? I would appreciate your guidance on resolving this issue.
Thank you for your support.
