Thunderstruck EVCC 2.4 Quick Start Manual

EVCC 2.4 Quick-Start Guide

The Electric Vehicle Charger Controller (EVCC) integrates charger CANBUS control, J1772 Level 2
charging, and BMS head end functions. Charge parameters are configured, saved in nonvolatile memory, and
used when charging to control a CAN enabled charger. The EVCC connects to analog “cell loop” Battery
Management Systems (BMSs) as well as CAN enabled BMSs.

The EVCC is configured using a simple serial interface. This interface is used for configuration and
debugging, but is not required for normal operation. Diagnostic commands are supported to verify proper
wiring, to trace CANBUS messages, and to retrieve charging history.

The EVCC supports the SAE J1772 standard. J1772 defines the physical connector and protocols used
between the charging station (known as the “Electric Vehicle Service Equipment”), and the Electric Vehicle.
The J1772 Proximity signal is used to determine if the charger plug is present. The J1772 Pilot signal is used
to start and stop charging (by enabling and disabling the contactor in the EVSE). The J1772 Pilot duty cycle

Figure 1 – EVCC System Diagram

is measured and can be used to limit charging current. “Driveaway protection” is supported so that the EV
cannot be driven if the charge cable is still plugged in.

The EVCC supports several CAN enabled chargers, including the Thunderstruck TSM2500 charger. Charge
voltage, charge current and overall charge time are controlled completely by the EVCC over the CAN
interface to the charger. A constant current/constant voltage charge curve is supported for Lithium Batteries;
and a three phase charge cycle is supported for Lead Acid Batteries.

The EVCC supports up to four parallel chargers for faster charging. When multiple chargers are configured,
they are individually CAN addressed. Work is divided evenly between the chargers and statistics are
gathered and recorded on each charger individually.

For complete documentation see http://www.thunderstruck-ev.com/tsm2500-and-charge-controller.html.