Drive Motor Battery System Description: Notes
| Callout | Component Name |
|---|---|
| 1 | High Voltage Battery Assembly |
| 2 | 14V Power Module |
| 3 | 300-Volt Battery Positive and Negative Cable |
| 4 | 5ET50 Transmission and T6 Power Inverter Module |
| 5 | G1 A/C Compressor |
The drive motor battery is also known as the high voltage battery assembly. The high voltage battery assembly stores 288V DC in eight lithium - ion battery sections. Current flows from the battery sections through a series of contactors contained in the disconnect relay assembly and a manually operated service disconnect. This allows the system to control the disconnect of high voltage from the vehicle and also creates a redundant manual disconnect to ensure voltage is disabled when servicing high voltage components. The service disconnect contains an internal non-serviceable fuse.
To ensure optimum life of the lithium - ion batteries, the hybrid powertrain control module 2 monitors the state of charge of each battery cell. The system will equalize the state of charge of each cell through a balancing process. The hybrid powertrain control module 2 is also responsible for monitoring and controlling the charging and the discharging of the high voltage battery.
The high voltage battery is charged during normal vehicle driving. During normal operation, the high voltage battery is maintained at or near an optimum level of charge.
The High Voltage Battery Assembly contains the following serviceable components:
- Hybrid/EV Battery Sections 1 - 8
- Hybrid/EV Powertrain Control Module 2
- Hybrid Battery Interface Control Modules 1 - 8
- High voltage battery disconnect relay assembly - contains:
- Main Contactors
- Pre - Charge Contactor
- Hybrid/EV Battery Pre - Charge Resistor
- High Voltage Battery Current Sensor
- High Voltage Manual Disconnect Lever
- High Voltage Interlock Switch