Alerts
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| Signal Name | Description | Condition | Impact | Important |
|---|---|---|---|---|
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The BMS detects that the state of charge (SOC) of the high voltage (HV) battery is too low to support driving.
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The BMS detects that the SOC is below the threshold to support driving.
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The vehicle begins end-of-drive ramp down.
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No
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Calculated Amp-hour Capacity (CAC) difference of bricks within a module exceeds acceptable threshold. This results in reduced battery performance and limits maximum range. Vehicle enters Battery Management System (BMS) limp mode.
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The estimated imbalance between the average CAC and minimum CAC within a single module exceeds the alert set threshold (CAC imbalance is not within acceptable range)
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Maximum charge and discharge current limits and maximum energy available are reduced, causing reduced battery performance and limiting maximum range. BMS limp mode is triggered, with another alert present to indicate this condition.
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No
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The battery management system (BMS) detects that the calculated Amp-hour capacity (CAC) difference between bricks within a single module exceeds the acceptable threshold, which may reduce battery performance.
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The BMS detects that the estimated CAC imbalance between the average CAC and the minimum CAC of bricks within a single module exceeds the acceptable threshold.
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Battery performance may be limited, which may reduce maximum range and may limit charging performance.
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No
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The Calculated Amp-hour Capacity (CAC) difference of bricks within a module exceeds the acceptable threshold. This results in reduced battery performance and limits maximum range.
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The estimated imbalance between the average CAC and minimum CAC within a single module exceeds the imbalance threshold.
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Maximum charge and discharge current limits and maximum energy available are reduced, causing reduced battery performance and reduced maximum range.
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No
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The battery management system (BMS) detects a possible state of charge (SOC) imbalance.
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The BMS detects that the difference between the most-charged brick and the least-charge brick in the high voltage (HV) pack is greater than the acceptable threshold.
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Maximum SOC is reduced to 50%.
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No
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The battery management system (BMS) has detected a condition affecting charge port (CP) functionality, making vehicle charging unavailable.
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The hardline from the CP to the BMS is active.
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Vehicle charging is unavailable.
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No
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The battery management system (BMS) detects that there is a brick voltage imbalance.
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The BMS has detected that the difference between the maximum brick voltage and the minimum brick voltage in the high voltage (HV) pack is greater than expected.
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This alert is primarily informational.
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No
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The battery management system (BMS) detects a mismatch between the pack voltage and the sum of brick voltages.
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The BMS detects that the HV pack voltage differs from the sum of the brick voltages by more than 3%.
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Inability to charge, drive, or support the low voltage (LV) system
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No
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The Bandolier Thermal Model was reset.
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The thermal model had invalid input data at wake from sleep, or the model temperature estimate diverged too far from the thermistor measurement.
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This alert is primarily informational and is used for logging purposes. No expected impact on vehicle functionality.
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No
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The Battery Management System (BMS) detects an unexpected condition with its internal low voltage supply inputs.
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The output voltage of the standby power supply is outside of the expected bounds.
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The standby power supply is unable to power Electronic Control Units (ECUs) during sleep which leads to greater support from the Low Voltage (LV) battery.
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No
|
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The battery management system is not receiving the expected CAN messages from the power conversion system (PCS).
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The BMS has not received the expected response from the PCS CAN.
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Inability to charge, drive, or support the low voltage (LV) system.
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No
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The Battery Management System (BMS) detects that one or more High Voltage Controller (HVC) voltage references is out of bounds.
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There is a significant difference between the BMS and High Voltage Processor (HVP) voltage reference readings.
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The vehicle may report inaccurate voltage measurements leading to alerts from the HV system.
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No
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The battery management system (BMS) does not have valid data for at least one brick voltage measurement.
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The BMS detects that it does not have valid voltage measurement data for at least one brick.
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Inability to charge, and power is reduced
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No
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The battery management system (BMS) detects conditions that indicate a potential propagating thermal event.
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At least one brick under/over voltage alert was recently active, and at least one isolation alert was recently active, and at least one battery monitoring board (BMB) missing (MIA) alert was recently active, and the max thermistor temp exceeds the limit, and the pack temperature gradient (maxTemp - minTemp) exceeds the threshold, and that gradient is increasing at a rate greater than the slop threshold.
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Indicates rapid temperature rise in conjunction with other critical alerts. Pack may remain inoperable and should be serviced according to proper procedures.
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No
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The Battery Management System (BMS) reports a previous destructive reset.
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The BMS experienced an unexpected reset.
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There is a temporary loss of High Voltage (HV) power.
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No
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The battery management system (BMS) has detected that there is an over voltage event.
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The BMS detects that the bus voltage is higher than maximum voltage threshold.
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Inability to charge, drive, or support the low voltage (LV) system
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No
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The battery management system (BMS) has detected that the high voltage interlock loop (HVIL) is shorted with the contactors closed.
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The BMS detects that HVIL voltage is lower than expected.
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Inability to charge, drive, or support the low voltage (LV) system
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No
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There is an external or internal isolation alert while pack contactors are closed.
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The BMS detects that isolation is below the minimum threshold while contactors are closed.
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Inability to charge, drive, or support the low voltage (LV) system
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No
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High impedance was detected on one or more bricks.
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Impedance for one or more bricks exceeds the noise threshold for several measurement counts.
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One or more cells in a brick are likely missing, resulting in a high impedance current path. Other potential causes are a high Direct Current Resistance (DCR), intermittent anode laser weld on the given brick(s), or an islanded brick.
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No
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The battery management system (BMS) detects a condition internal to the high voltage (HV) battery that requires the max allowed brick voltage to be limited.
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BMS_w117_SW_Delta_SOC_Weak_Short is set and (UI_dSocAlertEnable==1 or dSocAlertEnabledByDefault==1).
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The target max brick voltage for charge is limited to the voltage corresponding to 50% SOC.
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No
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