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The AEM EV Combined Charging Unit (CCU) combines both an On-Board Charger (OBC) and a DC-DC Converter (DCDC). The OBC charges the HV Battery Pack by taking 120v or 240v AC energy from the grid, converting it to high voltage DC and charging the high voltage battery in the vehicle. The DC-DC converter takes the high voltage from the battery pack and converts it to low voltage to maintain the charge in the vehicles 12V battery. The DC-DC converter performs the duties that the alternator does in an ICE vehicle. The CCU is fully controlled by the VCU via the CAN bus and the OBC and DC-DC report voltage, current and status information back to the VCU.
Installation Instructions- The DCDC LV output is rated at 91.5% efficiency at full load with a max continuous DCDC output of 178A @ 14V
- Compact design (275mm x 202mm x 68mm =3.8L volume) - 2.5x to 3x smaller than comparable units
- Lightweight (5.5kg, ~12 pounds) comparable units are typically 18-24 pounds
- Liquid cooled and temperature controlled for efficient thermal management
- The HV battery charger is rated at 93.5% efficiency at full load
- 6.6kw (32 amps) on board charger + 2.5kw DC-DC converter
- High voltage output over and under voltage protection
- High and low voltage output short circuit protection
- The CCU has the following protection functions:
- 350Vdc nominal output and up to 450Vdc max
- Input over and under voltage protection
- Plug-and-play with AEM's EV controls
- Over temperature protection