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StateOfHealth(): 0x20 and 0x21
4.15 StateOfHealth(): 0x20 and 0x21
0x20 SOH percentage: this read-only function returns an unsigned integer value, expressed as a
percentage of the ratio of predicted FCC(25°C,
SOH LoadI
) over the
DesignCapacity()
. The FCC(25°C,
SOH LoadI
) is the calculated FCC at 25°C and the
SOH LoadI
which is factory programmed (default =
–400 mA). The range of the returned SOH percentage is 0x00 to 0x64, indicating 0 to 100%,
correspondingly.
0x21 SOH Status: this read-only function returns an unsigned integer value, indicating the status of the
SOH percentage:
•
0x00: SOH not valid (initialization)
•
0x01: Instant SOH value ready
•
0x02: Initial SOH value ready
–
Calculation based on default Qmax
–
May not reflect SOH for currently inserted pack
•
0x03: SOH value ready
–
Calculation based on learned Qmax
–
Most accurate SOH for currently inserted pack following a Qmax update
•
0x04 through 0xFF: Reserved
4.16 RemainingCapacityUnfiltered(): 0x28 and 0x29
This read-only command pair returns the true battery capacity remaining. This value can jump as the
gauge updates its predictions dynamically. Units are mAh.
4.17 RemainingCapacityFiltered(): 0x2A and 0x2B
This read-only command pair returns the filtered battery capacity remaining. This value is not allowed to
jump unless
RemainingCapacityUnfiltered()
reaches empty or full before
RemainingCapacityFiltered()
does. Units are mAh.
4.18 FullChargeCapacityUnfiltered(): 0x2C and 0x2D
This read-only command pair returns the compensated capacity of the battery when fully charged. Units
are mAh.
FullChargeCapacityUnfiltered()
is updated at regular intervals.
4.19 FullChargeCapacityFiltered(): 0x2E and 0x2F
This read-only command pair returns the filtered compensated capacity of the battery when fully charged.
Units are mAh.
FullChargeCapacityFiltered()
is updated at regular intervals. It has no physical meaning
and is manipulated to ensure the
StateOfCharge()
register is smoothed if
OpConfigB [SMOOTHEN]
= 1.
4.20 StateOfChargeUnfiltered(): 0x30 and 0x31
This read-only command pair returns the true state-of-charge. Units are %.
StateOfChargeUnfiltered()
is
updated at regular intervals, and may jump as the gauge updates its predictions dynamically.
StateOfChargeUnfiltered()
is always calculated as
RemainingCapacityUnfiltered()
/
FullChargeCapacityUnfiltered()
, rounded up to the nearest whole percentage point.
23
SLUUAC9A – December 2013 – Revised May 2015
Standard Commands
Copyright © 2013–2015, Texas Instruments Incorporated