The Performance Optimizing Circuit operates in two distinct modes: Dual-Module Separated Invert (DMSI) and Combined Module Invert (CMI). Each mode has unique characteristics that influence battery heating and overall efficiency.
Key Differences Between DMSI and CMI Modes
| Feature | DMSI Mode | CMI Mode |
|---|---|---|
| Energy Transfer Mechanism | Transfers energy between different battery modules through the motor. | Directly charges and heats using stored energy from the motor coils. |
| Heating Power | Provides approximately twice the heating power compared to CMI mode. | Offers lower heating power, relying on direct charging. |
| Current Flow | Generates higher battery currents from motor coil currents transmitted to the battery modules. | Inverted currents result in a more stable but lower current flow to the battery. |
| Operational Configuration | One module is charged while another is discharged, enhancing robustness. | Operates in parallel, charging all battery modules simultaneously. |
| Voltage Vector Utilization | Utilizes multiple voltage vectors for effective energy transfer. | Primarily uses a limited set of voltage vectors for direct charging. |
Operational Insights
In DMSI mode, the system allows for greater flexibility in managing battery heating, enabling higher current flows between modules, which enhances efficiency and performance, especially in cold conditions.
Conversely, CMI mode focuses on direct charging, simplifying the process but resulting in lower heating power and less dynamic energy management.
These differences demonstrate how each mode can be tailored to optimize performance for specific operational demands and environmental conditions.