MyTeslaMate App

Signal Name	Description	Condition	Impact
HVBATT_a740_Bp1ImpedanceDeviation	High impedance was detected on one or more bricks.	Impedance for one or more bricks exceeds the noise threshold for several measurement counts.	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.
HVBATT_a739_Bp2SocChange	A State of Charge (SOC) correction of greater than 3% in Battery Subpack 2 occurred during the previous resting period.	The battery management system (BMS) updated the high voltage (HV) battery State of Charge (SOC) by more than 3% while the vehicle rested.	Significant change in displayed range (range variation) while the vehicle was not used.
HVBATT_a738_Bp1SocChange	A State of Charge (SOC) correction of greater than 3% in Battery Subpack 1 occurred during the previous resting period.	The battery management system (BMS) updated the high voltage (HV) battery State of Charge (SOC) by more than 3% while the vehicle rested.	Significant change in displayed range (range variation) while the vehicle was not used.
HVBATT_a737_Bp2CacImbalanceLimp	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.	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)	BMS limp mode is triggered, with another alert present to indicate this condition.
HVBATT_a736_Bp1CacImbalanceLimp	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.	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)	BMS limp mode is triggered, with another alert present to indicate this condition.
HVBATT_a735_Bp2CacImbalanceLimiting	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.	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	Reduced maximum range and limited charging performance.
HVBATT_a734_Bp1CacImbalanceLimiting	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.	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	Reduced maximum range and limited charging performance.
HVBATT_a733_Bp2CacImbalance	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.	The estimated imbalance between the average CAC and minimum CAC within a single module exceeds the imbalance threshold.	Reduced battery performance and reduced maximum range.
HVLINK_a017_Hvpack3Mia	The High Voltage Battery Subpack 3 (HVPACK3) is not reporting to the High Voltage DC Link Controller (HVLINK) on the Controller Area Network (CAN).	HVPACK3_interlocks is not received by HVLINK within the MIA qualification time interval.	HVLINK shall assume HVPACK3_pyroTestResponse = 0.
HVBATT_a732_Bp1CacImbalance	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.	The estimated imbalance between the average CAC and minimum CAC within a single module exceeds the imbalance threshold.	Reduced battery performance and reduced maximum range.
HVBATT_a725_Bp2DeltaSocWeakShort	A given brick has an alpha signal below the alert alpha threshold.	The computed alpha estimate for a brick is repeatedly below the alert alpha threshold. The threshold comes over the Controller Area Network (CAN) via signal MCU_dSocAlertThreshold.	This alert is primarily informational and is used for logging purposes. No expected impact on vehicle functionality.
HVBATT_a724_Bp1DeltaSocWeakShort	A given brick has an alpha signal below the alert alpha threshold.	The computed alpha estimate for a brick is repeatedly below the alert alpha threshold. The threshold comes over the Controller Area Network (CAN) via signal MCU_dSocAlertThreshold.	This alert is primarily informational and is used for logging purposes. No expected impact on vehicle functionality.
HVBATT_a723_Bp2DSocLimiting	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.	HVBATT_w723_deltaSocWeakShort is set and (UI_dSocAlertEnable==1 or dSocAlertEnabledByDefault==1).	The target max brick voltage for charge is limited to the voltage corresponding to 50% SOC.
HVBATT_a722_Bp1DSocLimiting	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.	HVBATT_w723_deltaSocWeakShort is set and (UI_dSocAlertEnable==1 or dSocAlertEnabledByDefault==1).	The target max brick voltage for charge is limited to the voltage corresponding to 50% SOC.
HVBATT_a502_HvMonBmbOverTemperature	A module temperature is above the warning temperature limit.	A module temperature is above the warning temperature limit for X duration (in seconds)	Power/drive limits may be reduced
HVBATT_a500_HvMonBmbOverVoltage	A brick voltage is above the fault voltage limit.	A brick voltage is above the fault voltage limit for X duration (in seconds)	The vehicle may not drive or charge.
HVBATT_a497_HvMonHsShuntOverCurrent	Warns if the high-side shunt current (discharge or charge) is above max current limit.	The high-side shunt current (discharge or charge) is above max current limit.	The pyro disconnect will blow
HVBATT_a495_HvMonLsShuntOverCurrent	Warns if the low-side shunt current (discharge or charge) is above max current limit.	The low-side shunt current (discharge or charge) is above max current limit.	The pyro disconnect will blow
HVBATT_a392_BpBusErrorPassive	The Battery Pack (BP) bus is in the error passive state.	The BP bus is disconnected or is experiencing a condition affecting its functionality, causing it to enter the error passive state.	The BP bus may be unable to communicate with other components.
HVBATT_a391_BpBusOff	The Battery Pack (BP) bus is in the BusOff state.	BP bus is experiencing a condition affecting its functionality, causing it to enter the BusOff state.	The BP bus is unable to communicate with other components.

HVBATT_a740_Bp1ImpedanceDeviation

High impedance was detected on one or more bricks.

Impedance for one or more bricks exceeds the noise threshold for several measurement counts.

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.

HVBATT_a739_Bp2SocChange

A State of Charge (SOC) correction of greater than 3% in Battery Subpack 2 occurred during the previous resting period.

The battery management system (BMS) updated the high voltage (HV) battery State of Charge (SOC) by more than 3% while the vehicle rested.

Significant change in displayed range (range variation) while the vehicle was not used.

HVBATT_a738_Bp1SocChange

A State of Charge (SOC) correction of greater than 3% in Battery Subpack 1 occurred during the previous resting period.

The battery management system (BMS) updated the high voltage (HV) battery State of Charge (SOC) by more than 3% while the vehicle rested.

Significant change in displayed range (range variation) while the vehicle was not used.

HVBATT_a737_Bp2CacImbalanceLimp

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.

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)

BMS limp mode is triggered, with another alert present to indicate this condition.

HVBATT_a736_Bp1CacImbalanceLimp

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.

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)

BMS limp mode is triggered, with another alert present to indicate this condition.

HVBATT_a735_Bp2CacImbalanceLimiting

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.

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

Reduced maximum range and limited charging performance.

HVBATT_a734_Bp1CacImbalanceLimiting

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.

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

Reduced maximum range and limited charging performance.

HVBATT_a733_Bp2CacImbalance

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.

The estimated imbalance between the average CAC and minimum CAC within a single module exceeds the imbalance threshold.

Reduced battery performance and reduced maximum range.

HVLINK_a017_Hvpack3Mia

The High Voltage Battery Subpack 3 (HVPACK3) is not reporting to the High Voltage DC Link Controller (HVLINK) on the Controller Area Network (CAN).

HVPACK3_interlocks is not received by HVLINK within the MIA qualification time interval.

HVLINK shall assume HVPACK3_pyroTestResponse = 0.

HVBATT_a732_Bp1CacImbalance

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.

The estimated imbalance between the average CAC and minimum CAC within a single module exceeds the imbalance threshold.

Reduced battery performance and reduced maximum range.

HVBATT_a725_Bp2DeltaSocWeakShort

A given brick has an alpha signal below the alert alpha threshold.

The computed alpha estimate for a brick is repeatedly below the alert alpha threshold. The threshold comes over the Controller Area Network (CAN) via signal MCU_dSocAlertThreshold.

This alert is primarily informational and is used for logging purposes. No expected impact on vehicle functionality.

HVBATT_a724_Bp1DeltaSocWeakShort

A given brick has an alpha signal below the alert alpha threshold.

The computed alpha estimate for a brick is repeatedly below the alert alpha threshold. The threshold comes over the Controller Area Network (CAN) via signal MCU_dSocAlertThreshold.

This alert is primarily informational and is used for logging purposes. No expected impact on vehicle functionality.

HVBATT_a723_Bp2DSocLimiting

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.

HVBATT_w723_deltaSocWeakShort is set and (UI_dSocAlertEnable==1 or dSocAlertEnabledByDefault==1).

The target max brick voltage for charge is limited to the voltage corresponding to 50% SOC.

HVBATT_a722_Bp1DSocLimiting

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.

HVBATT_w723_deltaSocWeakShort is set and (UI_dSocAlertEnable==1 or dSocAlertEnabledByDefault==1).

The target max brick voltage for charge is limited to the voltage corresponding to 50% SOC.

HVBATT_a502_HvMonBmbOverTemperature

A module temperature is above the warning temperature limit.

A module temperature is above the warning temperature limit for X duration (in seconds)

Power/drive limits may be reduced

HVBATT_a500_HvMonBmbOverVoltage

A brick voltage is above the fault voltage limit.

A brick voltage is above the fault voltage limit for X duration (in seconds)

The vehicle may not drive or charge.

HVBATT_a497_HvMonHsShuntOverCurrent

Warns if the high-side shunt current (discharge or charge) is above max current limit.

The high-side shunt current (discharge or charge) is above max current limit.

The pyro disconnect will blow

HVBATT_a495_HvMonLsShuntOverCurrent

Warns if the low-side shunt current (discharge or charge) is above max current limit.

The low-side shunt current (discharge or charge) is above max current limit.

The pyro disconnect will blow

HVBATT_a392_BpBusErrorPassive

The Battery Pack (BP) bus is in the error passive state.

The BP bus is disconnected or is experiencing a condition affecting its functionality, causing it to enter the error passive state.

The BP bus may be unable to communicate with other components.

HVBATT_a391_BpBusOff

The Battery Pack (BP) bus is in the BusOff state.

BP bus is experiencing a condition affecting its functionality, causing it to enter the BusOff state.

The BP bus is unable to communicate with other components.

Alerts

Alerts