Hybrid Electronics Cooling System Description and Operation
| Callout | Component Name |
|---|---|
| 1 | Electronics Coolant Reservoir |
| 2 | Hybrid/EV Radiator |
| 3 | Drive Motor Generator Power Inverter Module |
| 4 | 12 V Hybrid/EV Coolant Pump |
| 5 | Transmission Coolant Inlet and Outlet Ports |
The primary purpose of the hybrid/EV electronics cooling loop is to cool the drive motor generator power inverter module. The hybrid/EV electronics cooling system uses the hybrid/EV electronics radiator, control module inputs, two 12 V radiator fans and a 12 V hybrid/EV electronics coolant pump to circulate coolant through the system. The hybrid/EV powertrain control module 2 activates the hybrid/EV electronics coolant pump and monitors a temperature sensor in the hybrid/EV electronics radiator. The hybrid/EV electronics coolant pump will be activated whenever the vehicle is on.
The hybrid/EV electronics cooling system circulates a pre-mixed DEX-COOL® which is a 50/50 mixture of DEX-COOL® and de-ionized water. De-ionized water is required for high voltage isolation and to prevent corrosion from effecting heat sink performance. Always use pre-mixed coolant and never use tap water in the hybrid/EV electronics coolant system.