Voltage Imbalance at Rest Permanent Fail
39
SLUUBD3D – September 2015 – Revised September 2018
Copyright © 2015–2018, Texas Instruments Incorporated
Permanent Fail
Status
Condition
Action
Trip
FET Temperature in
DAStatus2()
continuous
≥
SOTF:Threshold for
SOTF:Delay duration
PFAlert()[SOTF]
= 0
PFStatus()[SOTF]
= 1
BatteryStatus()[OTA]
= 1
4.10 Voltage Imbalance at Rest Permanent Fail
The device can permanently disable the battery pack in case of a voltage difference between the cells in a
stack while at rest.
Status
Condition
Action
Normal
CellVoltage1..15()
<
VIMR:Check Voltage
OR
|
Current()
| >
VIMR:Check Current
OR
Δ
(
CellVoltage1..15()
) <
VIMR:Delta Threshold
PFAlert()[VIMR]
= 0
Alert
Any(
CellVoltage1..15()
)
≥
VIMR:Check Voltage
AND
|
Current()
| <
VIMR:Check Current
for
VIMR:Duration
AND
Δ
(
CellVoltage1..15()
)
≥
VIMR:Delta Threshold
PFAlert()[VIMR]
= 1
Trip
Any(
CellVoltage1..15()
)
≥
VIMR:Check Voltage
AND
|
Current()
| <
VIMR:Check Current
for
VIMR:Duration
AND
Δ
(
CellVoltage1..15()
)
≥
VIMR:Delta Threshold
for
VIMR:Delta Delay
PFAlert()[VIMR]
= 0
PFStatus()[VIMR]
= 1
BatteryStatus()[TCA]
= 1
BatteryStatus()[TDA]
= 1
Class
Subclass
Name
Type
Min
Max
Default
Unit
Permanent Fail
VIMR
Check Voltage
I2
0
5000
5000
mV
Permanent Fail
VIMR
Check Current
I2
0
32767
10
mA
Permanent Fail
VIMR
Delta Threshold
I2
0
5000
500
mV
Permanent Fail
VIMR
Delta Delay
U1
0
255
5
s
Permanent Fail
VIMR
Duration
U2
0
65535
100
s
4.11 Charge FET Permanent Fail
The device can permanently disable the battery pack in case the charge FET is not working properly.
Status
Condition
Action
Normal
CHG FET off AND
Current()
<
CFET:OFF Threshold
PFAlert()[CFETF]
= 0
Alert
CHG FET off AND
Current()
≥
CFET:OFF Threshold
PFAlert()[CFETF]
= 1
Trip
CHG FET off AND
Current()
continuously
≥
CFET:OFF
Threshold
for
CFET:OFF Delay
duration
PFAlert()[CFETF]
= 0
PFStatus()[CFETF]
= 1
BatteryStatus()[TCA]
= 1
BatteryStatus()[TDA]
= 1
Class
Subclass
Name
Type
Min
Max
Default
Unit
Permanent Fail
CFETF
OFF Threshold
I2
0
500
5
mA
Permanent Fail
CFETF
Delay
U1
0
255
5
s
4.12 Discharge FET Permanent Fail
The device can permanently disable the battery pack in case the discharge FET is not working properly.