Hyundai Ioniq: High Voltage Battery Control System / Pre Charge Relay. Description and operation

Hyundai Ioniq (AE) 2017-2025 Service Manual / Hybrid Control System / High Voltage Battery Control System / Pre Charge Relay. Description and operation

Description

The Power Relay Assembly (PRA) consists of the positive and negative main relays, pre-charge relay, pre-charge resistor and battery current sensor. It is located inside the battery pack assembly and controls the high voltage power circuit between the high voltage battery and inverter by the control signal of BMS ECU.

[PRA Operation Sequence]

Main Relay. Repair procedures

Removal • Be sure to read and follow the "General Safety Information and Caution" before doing any work related with the high voltage system...

Pre Charge Relay. Specifications

Specification Item Specification ContactRated Voltage (V)450Rated Current (A)20CoilOperating Voltage (V)12Resistance (Ω)40...

Other information:

Hyundai Ioniq (AE) 2017-2025 Service Manual: General information

Lift and Support Points1.Place the lift blocks under the support points as shown in the illustration.2.Raise the hoist a few inches (centimeters) and rock the vehicle to be sure it is firmly supported.3.Raise the hoist to full height to inspect the lift points for secure support...

Hyundai Ioniq (AE) 2017-2025 Service Manual: Safety Plug. Description and operation

DescriptionSafety Plug is installed on the rear side of the high voltage battery and it can mechanically shut the high voltage circuit off when servicing the high voltage system. (i.e. High Voltage Battery, Power Relay Assembly, HPCU, BMS ECU, Hybrid Drive Motor, Inverter, HSG, LDC, Power Cable, etc...