Safety Overcurrent in Discharge Permanent Fail
38
SLUUBD3D – September 2015 – Revised September 2018
Copyright © 2015–2018, Texas Instruments Incorporated
Permanent Fail
Status
Condition
Action
Normal
Current()
<
SOCC:Threshold
PFAlert()[SOCC]
= 0
Alert
Current()
≥
SOCC:Threshold
PFAlert()[SOCC]
= 1
BatteryStatus()[TCA]
= 1
BatteryStatus()[OCA]
= 1
Trip
Current()
≥
SOCC:Threshold
for
SOCC:Delay
duration
PFAlert()[SOCC]
= 0
PFStatus()[SOCC]
= 1
BatteryStatus()[TCA]
= 1
BatteryStatus()[TDA]
=1
BatteryStatus()[OCA]
= 1
4.7
Safety Overcurrent in Discharge Permanent Fail
The device can permanently disable the battery in the case of severe overcurrent in DISCHARGE or
RELAX state.
Status
Condition
Action
Normal
Current()
>
SOCD:Threshold
PFAlert()[SOCD]
= 0
Alert
Current()
≤
SOCD:Threshold
PFAlert()[SOCD]
= 1
BatteryStatus()[TDA]
= 1
Trip
Current()
≤
SOCD:Threshold
for
SOCD:Delay
duration
PFAlert()[SOCD]
= 0
PFStatus()[SOCD]
= 1
BatteryStatus()[TCA]
= 1
BatteryStatus()[TDA]
=1
4.8
Safety Overtemperature Cell Permanent Fail
The device can permanently disable the battery pack in case of severe overtemperature of the cells
detected using the external TS1...3 temperature sensor(s), which are configured to report
Temperature()
.
The
Temperature()
measurement configuration is controlled by setting the corresponding flag in
DA
Configuration
.
Status
Condition
Action
Normal
Cell Temperature in
DAStatus2()
<
SOT:Threshold
PFAlert()[SOT]
= 0
Alert
Cell Temperature in
DAStatus2()
≥
SOT:Threshold
PFAlert()[SOT]
= 1
BatteryStatus()[OTA]
= 1
Trip
Cell Temperature in
DAStatus2()
continuous
≥
SOT:Threshold
for
SOT:Delay
duration
PFAlert()[SOT]
= 0
PFStatus()[SOT]
= 1
BatteryStatus()[OTA]
= 1
BatteryStatus()[TCA]
= 1
BatteryStatus()[TDA]
= 1
Class
Subclass
Name
Type
Min
Max
Default
Unit
Permanent Fail
SOT
Threshold
I2
–400
1500
650
0.1°C
Permanent Fail
SOT
Delay
U1
0
255
5
s
4.9
Safety Overtemperature FET (SOTF) Permanent Fail
The device can disable the battery pack permanently in case of severe overtemperature on the power
FET. The temperature sensor(s) can be configured to report as FET Temperature in
DAStatus2()
by
setting the corresponding flags in
Temperature Mode
and
DA Configuration[FTEMP]
.
Status
Condition
Action
Normal
FET Temperature in
DAStatus2()
<
SOTF:Threshold
PFAlert()[SOTF]
= 0
Alert
FET Temperature in
DAStatus2()
≥
SOTF:Threshold
PFAlert()[SOTF]
= 1
BatteryStatus()[OTA]
= 1