Zero Motorcycles MX 2012, Owner'S Manual

Page: 59 / 142

4-10
•
High or Low Temperature
Action: If the BMS senses that the power pack is
too hot, above 71°C (160°F), or too cold, below -
7°C (20°F), it sends a signal to disable the motor
controller and the motorcycle will not run until the
temperature returns to an acceptable level. The
charger will also be disabled in this condition.
•
High Voltage
Action: If the BMS detects a voltage that is too
high, it shuts down the charger to prevent over-
charging.
The BMS is sealed inside the power pack. As a rider,
you don’t need to think much about the BMS - it just
silently does its job as you charge, ride, and store
your motorcycle.
Battery Management System (BMS)
Every power pack contains a Battery Management
System (BMS) which monitors the condition of the
cells and optimizes the charging process to provide
the highest-performance, longest-range, and longest-
life for the power pack.
The BMS safeguards the power back by means of
safety interlocks. These interlocks turn off or control
certain operations that could damage the power pack.
See Safety Interlocks on page 6-10 for more
information.
The BMS also monitors the power pack for a host of
predefined conditions, and then takes actions
according to these conditions. Some of these
conditions are listed below. Also see Understanding
BMS Flash Code Patterns on page 6-4.
•
Dangerously Low Voltage
Action: If the voltage drops to the point that may
damage the battery cells, the power pack sends a
signal to disable the motor controller and the
motorcycle will not run until the voltage returns to
an acceptable level.