Overview

AEM Electronics EV Combined Charging Units

AEM Electronics EV combined charging units (CCU) simplify the electric vehicle (EV) drive system. The units merge an on-board charger (OBC) and a DC-DC converter (DCDC). The OBC charges the HV battery pack by taking 120 V or 240 V 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 vehicle's 12 V battery, and performs the duties that the alternator does in an internal combustion engine (ICE) vehicle. The combined charging units are fully controlled by the VCU via the CANbus and the OBC and DC-DC report voltage, current, and status information back to the VCU.

The AEM EV CCUs are very compact and lightweight, while offering high efficiency, stable charging, long life, a high-protection level, and high reliability. They are 100 percent driven via CAN by the VCU in conjunction with the BMS-18, and is not directly controlled by the charge plug connector or the off vehicle EVSE (Electrical Vehicle Service Equipment).

Features:

* 6.6kw (32 amps) on-board charger + 2.5kw DC-DC converter
* 350 Vdc nominal output and up to 450 Vdc maximum
* Plug-and-play with AEM's EV controls
* Liquid cooled and temperature controlled for efficient thermal management
* Lightweight (5.5kg, 12 lbs.) compared to typical units at 18 to 24 lbs.
* Compact design--2.5 to 3x smaller than comparable units
* The HV battery charger is rated at 93.5 percent efficiency at full load
* The DC-DC LV output is rated at 91.5 percent efficiency at full load with a maximum continuous DC-DC output of 178 amps at 14 V
* The CCU has the following protection functions:
-- Input over and under voltage protection
-- High-voltage output over and under voltage protection
-- High- and low-voltage output short circuit protection
-- Over temperature protection

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