BQ34z110 Confirmation of Design steps for Impedance Track. 12V 7.2Ah Battery (Lead-Acid) (Re-looked and Edited)

Hi ThomasCosby,

I realized some mistakes on my previous post so i shortened it and corrected some mistakes,
could you please take a look at my questions.

I would liketo confirm my the Setup Procedurefor the bq34z110Impedance track before creating a Golden Image.

Below is a combination of the Data-sheet and the forum information.

Battery:Koyosonic Valve-Regulated Lead-Acid Battery NP7.2-12 (12V 7.2Ah/20HR)

6-Cells, 2V per Cell.

C = 7.2 derived from from 7200mA

DESIGN STEPS : Step 1:

1. Design Capacity: 7200mAh

2. Design Energy: 14400 (Design energy scale = 1x)Design Energy (E(mWh) = battery[mAh] x Cell[V]) (e.g 7200*2V = 14400mWh)

3. Cell Charge Voltage (T1-T2): 2250mV (default value)

4. Cell Charge Voltage (T2-T3): 2450mV (default value)

5. Cell Charge Voltage (T3-T4): 2350mV (default value)

DESIGN STEPS : Step 2:

1. Number of serrie cells: 6

DESIGN STEPS : Step 3:

1. Voltage Divider: 15000mVThe maximum expected battery voltage. (All Cells included)

DESIGN STEPS : Step 4:

1. CC Gain (mohm): 10mohm (After calibration this values becomes “0” ERROR?)

2. CC Delta (mohm): 10mohm (After calibration this values becomes “0” ERROR?)
   The value of the current sense resistor should be entered into both CC Gain and CC Delta

DESIGN STEPS : Step 5:

1. Load Mode: 0 Const-Current (default)

2. Load Select: 1 (Const-Current Default)

3. Cell Terminate Voltage: 1850mVThe theoretical cell voltage where the system will begin to fail for a single-cell(e.g. normal voltage=12000mV system fail=11000mV, cell fail voltage = 11000mv / 6cells = 1833mV),

4. Quit Current: 45mAThis value should be slightly higher than the expected idle current of the system. (e.g. 45mA)

5. Qmax Cell 0: 7200mAhEnter the C-rate value of your battery.Same as Design Capacity;

DESIGN STEPS : Step 6

Determine and Program the Chemical ID

DESIGN STEPS : Step 7

1. Calibrate using TI software.

DESIGN STEPS : Step 8

Optimization Cycle STEP 1:

1. Remove all external power from the battery and your device.

2. Disable the FConvEn bit in the Pack ConfigurationB register.

3. Make sure that the Flash Update OK voltage is set to 1000mV. (BIG QUESTIONMARK HERE Why what sould it realy be?)

Data flash can only be updated if Voltage()≥ Flash Update OK Voltage. Flash programming current can cause an increase in LDO dropout.The value of Flash Update OK Voltage should be selected such that the bq34z110 Vcc voltage does not
fall below its minimum of 2.4 V during Flash write operations. The default value of 2800 mV is appropriate.

1. Wait until the OCVTAKENflag gets set, this indicates a relaxed battery.

Optimization Cycle STEP 2:

1. Temporarily Adjust(lower)the Cell BL Set Volt Thresholdso as not to affect a full discharge.(BIG QUESTIONMARK HERE What is theCell BL Set Volt Threshold and what should it be ??)(I lowered Cell BL Set Volt Thresholdto 1600mV was (1800mV))

Optimization Cycle STEP 3:

1. Send the RESET(0x0041) and IT Enable(0x0021) command respectively.Note:You should NOThave to RESET and send IT ENABLE,if QENand VOKare set.The VOKand QENflags should automatically getset.

2. After IT ENABLE, Update Status should automatically get set to4. 

Optimization Cycle STEP 4:1. Connect a LOAD to the battery (Note: C/10 (or more e.g C/8)) (C(7.2)/8 = 0.9A)2. Discharge the battery until the battery is Empty (500mV below the Cell Term Voltage * # of cells).Important Note: Never discharge to zero, Cell Termination Voltage is cell based.E.g. Cell Termination Voltage = 1800mV.(1800mV  x 6Cells = 10800mV) then Discharge voltage equals (10800mV – 500mV = 10200mV).Optimization Cycle STEP 5:

1. Wait until the OCVTAKENflag gets set, this indicates a relaxed battery.

2. Wait for the VOK flag to clear.

3. Wait until Update Statusautomatically gets set to 5.

Optimization Cycle STEP 6: 

1. Charge the battery until FULL.(let it taper to to C/100.) (C(7.2)/100= 0.072A)Note: The VOK and QEN flags should automatically get set during the charging operation. ??

Optimization Cycle STEP 7:

1. Wait until the OCVTAKEN flag gets set, this indicates a relaxed battery.Note: the VOKflag will remain set.

Optimization Cycle STEP 8:

1. Connect a LOAD to the battery (Note: C/10 (or more e.g C/8)) (C(7.2)/8 = 0.9A)

2. Discharge the battery at C/10 (or more e.g C/8) until the battery is Empty 

   (500mV below the Cell Term Voltage * # of cells).

Optimization Cycle STEP 9:

1. Wait until the OCVTAKENflag gets set, this indicates a relaxed battery.

2. Wait for the VOK flag to clear.

3. Update Status should automatically get set to 6.

Optimization Cycle STEP 10:

1. Restore the Cell BL Set Volt Thresholdto the desired value. (1800mV)

2. FConvEnbit needs to be restored to 1. (Question??)
   Kind Regards Jacques.