SLUUBW5A July   2018  – September 2021 BQ34Z100-G1

 

  1. 1 Read This First
    1. 1.1 About This Manual
    2. 1.1 Notational Conventions
    3. 1.1 Glossary
    4. 1.1 Trademarks
  2. 1 Introduction
  3. 2 Data Commands
    1. 2.1 Standard Data Commands
      1. 2.1.1  Control(): 0x00/0x01
        1. 2.1.1.1  CONTROL_STATUS: 0x0000
        2. 2.1.1.2  DEVICE TYPE: 0x0001
        3. 2.1.1.3  FW_VERSION: 0x0002
        4. 2.1.1.4  HW_VERSION: 0x0003
        5. 2.1.1.5  RESET_DATA: 0x0005
        6. 2.1.1.6  PREV_MACWRITE: 0x0007
        7. 2.1.1.7  CHEM ID: 0x0008
        8. 2.1.1.8  BOARD_OFFSET: 0x0009
        9. 2.1.1.9  CC_OFFSET: 0x000A
        10. 2.1.1.10 CC_OFFSET_SAVE: 0x000B
        11. 2.1.1.11 DF_VERSION: 0x000C
        12. 2.1.1.12 SET_FULLSLEEP: 0x0010
        13. 2.1.1.13 STATIC_CHEM_DF_CHKSUM: 0x0017
        14. 2.1.1.14 SEALED: 0x0020
        15. 2.1.1.15 IT ENABLE: 0x0021
        16. 2.1.1.16 CAL_ENABLE: 0x002D
        17. 2.1.1.17 RESET: 0x0041
        18. 2.1.1.18 EXIT_CAL: 0x0080
        19. 2.1.1.19 ENTER_CAL: 0x0081
        20. 2.1.1.20 OFFSET_CAL: 0x0082
      2. 2.1.2  StateOfCharge(): 0x02
      3. 2.1.3  MaxError(): 0x03
      4. 2.1.4  RemainingCapacity(): 0x04/0x05
      5. 2.1.5  FullChargeCapacity(): 0x06/07
      6. 2.1.6  Voltage(): 0x08/0x09
      7. 2.1.7  AverageCurrent(): 0x0A/0x0B
      8. 2.1.8  Temperature(): 0x0C/0x0D
      9. 2.1.9  Flags(): 0x0E/0x0F
      10. 2.1.10 FlagsB(): 0x12/0x13
      11. 2.1.11 Current(): 0x10/0x11
    2. 2.2 Extended Data Commands
      1. 2.2.1  AverageTimeToEmpty(): 0x18/0x19
      2. 2.2.2  AverageTimeToFull(): 0x1A/0x1B
      3. 2.2.3  PassedCharge(): 0x1C/0x1D
      4. 2.2.4  DOD0Time(): 0x1E/0x1F
      5. 2.2.5  AvailableEnergy(): 0x24/0x25
      6. 2.2.6  AveragePower(): 0x26/0x27
      7. 2.2.7  SerialNumber(): 0x28/0x29
      8. 2.2.8  InternalTemperature(): 0x2A/0x2B
      9. 2.2.9  CycleCount(): 0x2C/0x2D
      10. 2.2.10 StateOfHealth(): 0x2E/0x2F
      11. 2.2.11 ChargeVoltage(): 0x30/0x31
      12. 2.2.12 ChargeCurrent(): 0x32/0x33
      13. 2.2.13 PackConfiguration(): 0x3A/0x3B
      14. 2.2.14 DesignCapacity(): 0x3C/0x3D
      15. 2.2.15 DataFlashClass(): 0x3E
      16. 2.2.16 DataFlashBlock(): 0x3F
      17. 2.2.17 AuthenticateData/BlockData(): 0x40…0x53
      18. 2.2.18 AuthenticateChecksum/BlockData(): 0x54
      19. 2.2.19 BlockData(): 0x55…0x5F
      20. 2.2.20 BlockDataChecksum(): 0x60
      21. 2.2.21 BlockDataControl(): 0x61
      22. 2.2.22 GridNumber(): 0x62
      23. 2.2.23 LearnedStatus(): 0x63
      24. 2.2.24 Dod@Eoc(): 0x64/0x65
      25. 2.2.25 QStart(): 0x66/0x67
      26. 2.2.26 TrueRC(): 0x68/0x69
      27. 2.2.27 TrueFCC(): 0x6A/0x6B
      28. 2.2.28 StateTime(): 0x6C/0x6D
      29. 2.2.29 QmaxPassedQ(): 0x6E/0x6F
      30. 2.2.30 DOD0(): 0x70/0x71
      31. 2.2.31 QmaxDod0(): 0x72/0x73
      32. 2.2.32 QmaxTime(): 0x74/0x75
      33. 2.2.33 Data Flash Interface
        1. 2.2.33.1 Accessing Data Flash
        2. 2.2.33.2 Manufacturer Information Block
        3. 2.2.33.3 Access Modes
        4. 2.2.33.4 Sealing/Unsealing Data Flash Access
  4. 3 Fuel Gauging
    1. 3.1  Overview
    2. 3.2  Impedance Track Variables
      1. 3.2.1  Load Mode
      2. 3.2.2  Load Select
      3. 3.2.3  Reserve Cap-mAh
      4. 3.2.4  Reserve Cap-mWh/cWh
      5. 3.2.5  Design Energy Scale
      6. 3.2.6  Dsg Current Threshold
      7. 3.2.7  Chg Current Threshold
      8. 3.2.8  Quit Current, Dsg Relax Time, Chg Relax Time, and Quit Relax Time
      9. 3.2.9  Qmax
      10. 3.2.10 Update Status
      11. 3.2.11 Avg I Last Run
      12. 3.2.12 Avg P Last Run
      13. 3.2.13 Cell Delta Voltage
      14. 3.2.14 Ra Tables
      15. 3.2.15 StateOfCharge() Smoothing
      16. 3.2.16 Charge Efficiency
      17. 3.2.17 Lifetime Data Logging
    3. 3.3  Device Configuration
      1. 3.3.1 Pack Configuration Register
      2. 3.3.2 Pack Configuration B Register
      3. 3.3.3 Pack Configuration C Register
    4. 3.4  Voltage Measurement and Calibration
      1. 3.4.1 1S Example
      2. 3.4.2 7S Example
      3. 3.4.3 Autocalibration
    5. 3.5  Temperature Measurement
    6. 3.6  Overtemperature Indication
      1. 3.6.1 Overtemperature: Charge
      2. 3.6.2 Overtemperature: Discharge
    7. 3.7  Charging and Charge Termination Indication
    8. 3.8  SCALED Mode
    9. 3.9  LED Display
    10. 3.10 Alert Signal
  5. 4 Communications
    1. 4.1 Authentication
    2. 4.2 Key Programming
    3. 4.3 Executing an Authentication Query
    4. 4.4 HDQ Single-Pin Serial Interface
    5. 4.5 I2C Interface
    6. 4.6 Switching Between I2C and HDQ Modes
      1. 4.6.1 Converting to HDQ Mode
      2. 4.6.2 Converting to I2C Mode
  6. 5 Device Functional Modes
    1. 5.1 NORMAL Mode
    2. 5.2 SLEEP Mode
    3. 5.3 FULL SLEEP Mode
  7. 6 Power Control
    1. 6.1 Reset Functions
    2. 6.2 Wake-Up Comparator
    3. 6.3 Flash Updates
  8. 7 Data Flash Summary
  9. 8 Gas Gauge Timing Considerations
    1. 8.1 Gauging Effects on I2C Transactions
    2. 8.2 HDQ Bus Effects on Gauging
    3. 8.3 Gauging Effects on HDQ Transactions
    4. 8.4 Manufacturer Timing Notes
  10. 9 HDQ Communication Basics
    1. 9.1 Basic HDQ Protocol
    2. 9.2 Break
    3. 9.3 Basic Timing
    4. 9.4 Reading 16-Bit Words
    5. 9.5 Host Processor Interrupts Using Discrete I/O Port for HDQ
    6. 9.6 Using UART Interface to HDQ
  11. 10Procedures to Seal and Unseal the Gauge
    1. 10.1 Unseal the Gauge to UNSEALED Mode
    2. 10.2 Unseal the Gauge to FULL ACCESS Mode
    3. 10.3 Seal the Gauge
  12. 11Impedance Track Gauge Configuration
    1. 11.1 Introduction
    2. 11.2 Determining ChemID
    3. 11.3 Learning Cycle
    4. 11.4 Common Problems Seen During the Learning Cycle
    5. 11.5 Test Gauge and Optimize
    6. 11.6 Finalize Golden File
    7. 11.7 Program and Test the PCB
  13. 12Revision History

3.7 Charging and Charge Termination Indication

For proper BQ34Z100-G1 operation, the battery per cell charging voltage must be specified by the user in Cell Charging Voltage. The default value for this variable is Charging Voltage = 4200 mV. This parameter should be set to the recommended charging voltage for the entire battery stack divided by the number of series cells.

The device detects valid charge termination in one of three ways:

  1. Current Taper method:
    1. During two consecutive periods of Current Taper Window, the AverageCurrent() is less than Taper Current AND
    2. During the same periods, the accumulated change in capacity > 0.25 mAh /Taper Current Window AND
    3. Voltage() is > Charging Voltage – Charging Taper Voltage. When this occurs, the [CHG] bit of Flags() is cleared. Also, if the [RMFCC] bit of Pack Configuration is set, and RemainingCapacity() is set equal to FullChargeCapacity().
  2. Delta Temperature (ΔT/Δt) method—For ΔT/Δt, the BQ34Z100-G1 detects an increase in temperature over many seconds. The ΔT/Δt setting is programmable in the temperature step, Delta Temp (0°C – 25.5°C), and the time step, Delta Temp Time (0 s–1000 s). Typical settings for 1°C/minute include 2°C/120 s and 3°C/180 s (default). Longer times may be used for increased slope resolution.

    In addition to the ΔT/Δt timer, a holdoff timer starts when the battery is charged at more than Holdoff Current (default is 240 mA), and the temperature is above Holdoff Temp. Until this timer expires, ΔT/Δt detection is suspended. If Current() drops below Holdoff Current or Temperature() below Holdoff Temp, the holdoff timer resets and restarts only when the current and temperature conditions are met again.

  3. Negative Delta Voltage (–ΔV) method—For negative delta voltage, the BQ34Z100-G1 detects a charge termination when the pack voltage drops during charging by Cell Negative Delta Volt for a period of Cell Negative Delta Time during which time Voltage() must be greater than Cell Negative Qual Volt.

When either condition occurs, the Flags()[CHG] bit is cleared. Also, if the [RMFCC] bit of Pack Configuration is set, and RemainingCapacity() is set equal to FullChargeCapacity().

GUID-835A62F8-25AE-4FED-9CF3-8E631150E319-low.gifFigure 3-1 NiXX Termination