Z
e r o
e
m i s s i o n
V
e h i c l e s
A
u s t r A l i A
http://www.zeva.com.au
EVMS Lite
v1.0
Introduction
Thank you for purchasing ZEVA’s Electric Vehicle Management System. The EVMS was
developed to address the need for safer, more reliable and better integrated EV conversions.
The Lite module is a simplified version of our EVMS Core, for those who only need basic BMS
functionality. The Lite communicates with battery management modules over CAN bus and
manages your vehicle’s drive and charge circuits according to battery status, automatically
shutting down the vehicle if any cells exceed safe voltage range.
It also features auxiliary contactor control (for managing any mid-pack contactors), remote
LED for viewing status from the cabin and a buzzer output for audible warnings of any
errors. The EVMS Lite can optionally be used with an EVMS Monitor module for viewing
current vehicle status as well as full BMS information such as individual cell voltages and
pack statistics. The Monitor may also be used for reprogramming BMS parameters over the
CAN bus.
This manual describes the installation and operation of the EVMS Lite, with some additional
content describing interaction with the EVMS Monitor.
Safety Warning
Electric vehicles are high powered devices which involve potentially lethal voltages and
currents. Proper precautions and electrical safety procedures should always be observed,
voltages above 110VDC should be considered dangerous, and vehicles should never be
worked on while power contactor(s) are engaged. Please read this manual carefully to
ensure correct installation and operation. If you are unsure of anything, please contact us
before proceeding.
We have endeavoured to make a safe and reliable product which performs as described,
however since ZEVA has no control over the integration of its products into a vehicle, we can
assume no responsibility for the final safety or functionality of the completed vehicle.
It is up to the end user to determine the suitability of the products for the purpose employed,
and the end user assumes all risks associated. Products should only be installed by suitably
qualified and experienced persons, and should always be used in a safe and lawful
manner.
Specifications
Power supply: 13.5V nominal (8-20V maximum)
•
Current consumption: 5mA idle, 25mA active
•
Contactor outputs rated at up to 5A
•
Dual CAN bus ports (5-pin Molex KK)
•
Dimensions: 82x56x10mm
•
Weight: 20g
•
EVMS Lite Installation
The EVMS Lite should be mounted securely in the vehicle using the four 3mm holes on the
board, in a location protected from the weather. The Lite has nine mini quick connect (spade)
terminals across one edge for its main connections, plus dual CAN ports on opposite sides.
Wire gauge for most I/O connections should be around 18-20AWG to ensure reasonable
mechanical strength and current rating.
The following page shows a typical wiring diagram for an EVMS Lite in a vehicle (plus
associated BMS modules and EVMS Monitor).
