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Electrical Power Management System - Battery (EPMS)

Description:

• The EPMS, on the Genesis, measures temperature, amperage, and voltage through a battery sensor and sends the data to the ECM. The ECM then calculates State of Charge (SOC) and determines the amount of charge.

• The Battery is located in the trunk of the Genesis and the Battery Sensor is located on the negative battery terminal.

Under hood battery posts Do not test here.

Under hood battery posts Do not test here.

Battery SensorBattery Sensor

Battery is located in the trunk for the Genesis. Battery is located in the trunk for the Genesis.

Genesis EPMS

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EPMS - Charging System Operation

Operation:

• EPMS data is sent from the battery sensor to the ECM.

• The ECM will monitor the SOC, compare other vehicle conditions and determine the charging voltage.

• Battery voltage will vary due to different operating conditions and system strategy (12.7-14.2 volts).

Monitoring SOCMonitoring SOC

Vehicle conditionsVehicle conditions

Decide charging voltageDecide charging voltage

Battery Sensor DataBattery Sensor DataWake up mode every 8 hours

TPS VSS RPMTPS VSS RPM

Note: The GDS will display SOC, Battery Amperage, Voltage and Temperature.EPMS Codes and Diagnostics will be covered in another FIR micro-module.

Note: The GDS will display SOC, Battery Amperage, Voltage and Temperature.EPMS Codes and Diagnostics will be covered in another FIR micro-module.

ECM

AlternatorAlternator

Genesis EPMS

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EPMS - Charging System Strategy

Battery State of Charge (SOC)

Note: If there is a malfunction with the battery sensor, the alternator will charge like a conventional charging system.

Note: If there is a malfunction with the battery sensor, the alternator will charge like a conventional charging system.

Float Charge No need to charge. Float Charge No need to charge.

Absorption Charge Charging or not charging depending on conditions.

Absorption Charge Charging or not charging depending on conditions.

Bulk Charge Charging is required and is more important than fuel economy.

Bulk Charge Charging is required and is more important than fuel economy.

Genesis EPMS

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EPMS – Initial Ignition Charging Sequence

At start-up, theBattery is charged for 120 - 150 seconds

After 150 seconds the System goes into Discharge mode; until the voltage drops below 12.7V orSOC less than 85%

When the SOC drops below 85%,the ECM will use the feedback Voltage to manage the charging until the correct SOC is achieved

2 ~ 2.5 min 26 min

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Genesis EPMS