2.9 Overtemperature in Discharge Protection
The device has an overtemperature protection for cells in DISCHARGE or RELAX state (that is, non-charging
state with BatteryStatus[DSG] = 1).
Status Condition Action
Normal Temperatures() < OTD:Threshold OR charging SafetyAlert()[OTD] = 0
Alert
Temperatures() ≥ OTD:Threshold AND not charging (that is,
BatteryStatus[DSG] = 1)
SafetyAlert()[OTD] = 1
BatteryStatus()[TDA] = 1
Trip
Cell Temperature in Temperatures() ≥ OTD:Threshold AND not charging
(that is, BatteryStatus[DSG] = 1) for OTD:Delay duration
SafetyAlert()[OTD] = 0
SafetyStatus()[OTD] = 1
BatteryStatus()[OTA] = 1
OperationStatus()[XDSG] = 1
BatteryStatus()[TDA] = 0
Recovery
SafetyStatus()[OTD] AND Cell Temperature in Temperatures() ≤
OTD:Recovery
SafetyStatus()[OTD] = 0
BatteryStatus()[OTA] = 0
OperationStatus()[XDSG] = 0
BatteryStatus()[TDA] = 0
2.10 Undertemperature in Charge Protection
The device has an undertemperature protection for cells in charge direction.
Status Condition Action
Normal Temperatures() > UTC:Threshold OR not charging SafetyAlert()[UTC] = 0
Alert Temperatures() ≤ UTC:Threshold AND charging SafetyAlert()[UTC] = 1
Trip Temperatures() ≤ UTC:Threshold AND charging for UTC:Delay duration
SafetyAlert()[UTC] = 0
SafetyStatus()[UTC] = 1
OperationStatus()[XCHG] = 1
Recovery SafetyStatus()[UTC] AND Temperatures() ≥ UTC:Recovery
SafetyStatus()[UTC] = 0
OperationStatus()[XCHG] = 0
2.11 Undertemperature in Discharge Protection
The device has an undertemperature protection for cells in DISCHARGE or RELAX state (that is, non-charging
state with BatteryStatus[DSG] = 1).
Status Condition Action
Normal Temperatures() > UTD:Threshold OR charging SafetyAlert()[UTD] = 0
Alert
Temperatures() ≤ UTD:Threshold AND not charging (that is,
BatteryStatus[DSG] = 1)
SafetyAlert()[UTD] = 1
Trip
Temperatures() ≤ UTD:Threshold AND not charging (that is,
BatteryStatus[DSG] = 1) for UTD:Delay duration
SafetyAlert()[UTD] = 0
SafetyStatus()[UTD] = 1
OperationStatus()[XDSG] = 1
Recovery SafetyStatus()[UTD] AND Temperatures() ≥ UTD:Recovery
SafetyStatus()[UTD] = 0
BatteryStatus()[OTA] = 0
OperationStatus()[XDSG] = 0
2.12 Precharge Timeout Protection
The device can measure the precharge time and stop charging if it exceeds the adjustable period.
Status Condition Action
Enable
Current() > PTO:Charge Threshold AND
ChargingStatus()[PV] = 1
Start PTO timer
SafetyAlert()[PTOS] = 0
Suspend or Recovery Current() < PTO:Suspend Threshold
Stop PTO timer
SafetyAlert()[PTOS] = 1
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SLUUCO0 – APRIL 2022
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BQ28Z610-R2 17
Copyright © 2022 Texas Instruments Incorporated
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