SLUUCO5A december   2022  – august 2023 BQ34Z100-R2

 

  1.   1
  2.   Read This First
    1.     About This Manual
    2.     Notational Conventions
    3.     Glossary
    4.     Trademarks
  3. 1 Introduction
  4. 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  VoltScale(): 0x20
      6. 2.2.6  CurrScale(): 0x21
      7. 2.2.7  EnegyScale(): 0x22
      8. 2.2.8  AvailableEnergy(): 0x24/0x25
      9. 2.2.9  AveragePower(): 0x26/0x27
      10. 2.2.10 SerialNumber(): 0x28/0x29
      11. 2.2.11 InternalTemperature(): 0x2A/0x2B
      12. 2.2.12 CycleCount(): 0x2C/0x2D
      13. 2.2.13 StateOfHealth(): 0x2E/0x2F
      14. 2.2.14 ChargeVoltage(): 0x30/0x31
      15. 2.2.15 ChargeCurrent(): 0x32/0x33
      16. 2.2.16 PackConfiguration(): 0x3A/0x3B
      17. 2.2.17 DesignCapacity(): 0x3C/0x3D
      18. 2.2.18 DataFlashClass(): 0x3E
      19. 2.2.19 DataFlashBlock(): 0x3F
      20. 2.2.20 AuthenticateData/BlockData(): 0x40…0x53
      21. 2.2.21 AuthenticateChecksum/BlockData(): 0x54
      22. 2.2.22 BlockData(): 0x55…0x5F
      23. 2.2.23 BlockDataChecksum(): 0x60
      24. 2.2.24 BlockDataControl(): 0x61
      25. 2.2.25 GridNumber(): 0x62
      26. 2.2.26 LearnedStatus(): 0x63
      27. 2.2.27 Dod@Eoc(): 0x64/0x65
      28. 2.2.28 QStart(): 0x66/0x67
      29. 2.2.29 TrueRC(): 0x68/0x69
      30. 2.2.30 TrueFCC(): 0x6A/0x6B
      31. 2.2.31 StateTime(): 0x6C/0x6D
      32. 2.2.32 QmaxPassedQ(): 0x6E/0x6F
      33. 2.2.33 DOD0(): 0x70/0x71
      34. 2.2.34 QmaxDod0(): 0x72/0x73
      35. 2.2.35 QmaxTime(): 0x74/0x75
      36. 2.2.36 Data Flash Interface
        1. 2.2.36.1 Accessing Data Flash
        2. 2.2.36.2 Manufacturer Information Block
        3. 2.2.36.3 Access Modes
        4. 2.2.36.4 Sealing/Unsealing Data Flash Access
  5. 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  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  The Scale Factors
    9. 3.9  LED Display
    10. 3.10 Alert Signal
    11. 3.11 Fast Resistance Scaling
      1. 3.11.1 Calculation of Resistance Scale
      2. 3.11.2 Negative Resistance Scale
      3. 3.11.3 Reset of Resistance Scale
      4. 3.11.4 Fast Resistance Scaling Configuration
  6. 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
  7. 5 Device Functional Modes
    1. 5.1 NORMAL Mode
    2. 5.2 SLEEP Mode
    3. 5.3 FULL SLEEP Mode
  8. 6 Power Control
    1. 6.1 Reset Functions
    2. 6.2 Wake-Up Comparator
    3. 6.3 Flash Updates
  9. 7 Data Flash Summary
  10. 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
  11. 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
  12. 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
  13. 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
  14. 12Revision History

3.7 Charging and Charge Termination Indication

For proper BQ34Z100-R2 operation, the battery per cell charging voltage must be specified by the user in Cell Charge Voltage Tx- Tx+1in data flash. The default value for this variable is Cell Charge Voltage T2-T3 = 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 is less than Taper Current AND
    2. During the same periods, the accumulated change in capacity >Min Taper Capacity AND
    3. Voltage() is > ChargeVoltage() – Cell Taper Voltage*Number of series cell /VoltScale(). 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().

    Current Taper method can be used to support Charge Termination Detection for applications based on Li-Ion, LiFePO4, PbA chemistries.

  2. Delta Temperature (ΔT/Δt) method—For ΔT/Δt, the BQ34Z100-R2 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.

    Delta Temperature(ΔT/Δt) method can be used to support Charge Termination Detection for applications based on NiMH or NiCd chemistries.

  3. Negative Delta Voltage (–ΔV) method—For negative delta voltage, the BQ34Z100-R2 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.

    Negative Delta Voltage(-ΔV) method can be used to support Charge Termination Detection for application based on NiMH or NiCd chemistries.

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-43064C87-BE58-41F4-9405-F3B2EDFE3683-low.gif Figure 3-1 NiXX Termination