SLUAAT6 July   2024 BQ41Z50

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Manufacture Testing
  5. 2Calibration
    1. 2.1 Cell Voltage Calibration
    2. 2.2 BAT Voltage Calibration
    3. 2.3 PACK Voltage Calibration
    4. 2.4 Current Calibration
      1. 2.4.1 CC Offset Calibration
      2. 2.4.2 Board Offset Calibration
      3. 2.4.3 CC Gain Calibration
    5. 2.5 Temperature Calibration
      1. 2.5.1 Internal Temperature Sensor Calibration
      2. 2.5.2 TS1–TS2–TS3–TS4 Calibration
  6. 3References

2 Calibration

The device has integrated routines that support calibration of current, voltage, and temperature readings, accessible after writing 0xF081 or 0xF082 to ManufacturerAccess() when the ManufacturingStatus()[CAL] bit is ON. While the calibration is active, the raw ADC data is available on ManufacturerData(). The device stops reporting calibration data on ManufacturerData() if any other MAC commands are sent or the device is reset or sealed.

Note: The ManufacturingStatus())[CAL] bit must be turned OFF after calibration is completed. This bit is cleared at reset or after sealing.
ManufacturerAccess()Description
0x002DEnables/Disables ManufacturingStatus() [CAL]
0xF080Disables raw ADC data output on ManufacturerData()
0xF081Outputs raw ADC data of voltage, current, and temperature on ManufacturerData()
0xF082Outputs raw ADC data of voltage, current, and temperature on ManufacturerData(). This mode enables an internal short on the coulomb counter inputs (SRP, SRN).

The ManufacturerData() output format is: ZZYYaaAAbbBBccCCddDDeeEEffFFggGGhhHHiiIIjjJJkkKK,

where:

ValueFormatDescription
ZZbyte8-bit counter, increments when raw ADC values are refreshed (every 250ms)
YYbyteOutput status
ManufacturerAccess() = 0xF081: 1
ManufacturerAccess() = 0xF082: 2
AAaa2's compCurrent (coulomb counter)
BBbb2's compCell voltage 1
CCcc2's compCell voltage 2
DDdd2's compCell voltage 3
EEee2's compCell voltage 4
FFff2's compPACK voltage
ValueFormatDescription
GGgg2's compBAT Voltage
HHhh2's compCell current 1
IIii2's compCell current 2
JJjj2's compCell current 3
KKkk2's compCell current 4