Circuit/System Description

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The B30 hybrid/EV battery pack current sensor is a non-serviceable part of the A28 hybrid/EV battery contactor assembly mounted inside the hybrid/EV battery pack. The negative high voltage bus bar that goes to the contactor relay passes through the hybrid/EV battery pack current sensor. The hybrid/EV battery pack current sensor detects the amperage that flows in and out of the hybrid/EV batteries. The hybrid/EV powertrain control module 2 supplies and monitors a 5 V reference signal to the hybrid/EV battery pack current sensor. The hybrid/EV battery pack current sensor returns a signal between 0 and 5 V to the hybrid/EV powertrain control module 2. The hybrid/EV battery pack current sensor signal is in proportion to the amperage going in and out of the hybrid/EV battery pack. A signal voltage of the hybrid/EV battery pack current sensor greater than 3.24 V indicates that the hybrid/EV battery is being charged and a signal voltage less than 3.24 V indicates discharging.