EV WEST EV 101 Class by Electric Vehicle User Guide
- June 12, 2024
- EV WEST
Table of Contents
EV 101 Class by Electric Vehicle
Dilithium BMS 2.2
Common Settings – Quick Start
Settings are for a 3.30V-4.20V Chemistry
Compatible Modules Include Tesla 5.3kWh, Smart, LG Chem, Samsung, Panasonic
This is a quick reference guide to the most common settings for our most
commonly used battery modules.
This is not a replacement for the Dilithium Designs BMS 2.2 Manual, and you
must fully read the manual before
using this guide.
HVC – High Voltage Cutoff = 4.15-4.20 Volts
This is the voltage at which the BMS goes into High Voltage Alert. You want
this to be at or slightly above your
charge voltage, so if you are more conservative with your charge voltage
(4.15V) then the HVC should reflect
that setting.
LVC – Low Voltage Cutoff = 3.30-3.35 Volts
This is the voltage at which the BMS goes into Low Voltage Alert. You want
this to be at or slightly above your
discharge voltage of your cell, so while many chemistries will list 3.0 to 3.2
Volts for the discharge floor, we like
3.30 Volts as it’s a little more conservative and will help your pack last
longer with less degradation.
HVCC – High Voltage Cutoff Clear = 4.10-4.15 Volts
This is the voltage at which the High Voltage Cutoff Alert is cleared, so the
voltage needs to drop below
this value. We typically set this for 0.05 Volts below your HVC value.
LVCC – Low Voltage Cutoff Clear = 3.35-3.40 Volts
This is the voltage at which the Low Voltage Cutoff Alert is cleared, so the
voltage needs to rise above
this value. We typically set this for 0.05 Volts above your LVC value.
HVCDELAY – High Voltage Alarm Delay = 10 Seconds
This is the time in Seconds that the HVC Alert is suppressed. This is useful
during periods of brake regen
that might briefly cause the voltage to go above the HVC value when the state
of charge is high. By having
a 10 Second delay, this allows the alarm to function well for charging while
also filtering regen high voltages.
LVCDELAY – Low Voltage Alarm Delay = 10 Seconds
This is the time in Seconds that the LVC Alert is suppressed. This is useful
during periods of hard acceleration
that might briefly cause the voltage to fall below the LVC value when the
state of charge is low. By having
a 10 Second delay, this allows the alarm to function well for discharge
values, while filtering short periods of
hard acceleration and temporary voltage sag.
BVMIN – Balancing Voltage Minimum = 3.60 Volts
This is the voltage at which the BMS will stop the balance discharge function
once the cells drops below this
value. This prevents a total discharge of the pack, or loss of range at a
lower state of charge. Typically we set
this just below nominal voltage to balancing won’t occur in the bottom 40% of
the pack.
THMAX – Thermistor Maximum = 50 Degrees Celsius
This is the temperature at which the over-temperature fault is set. Most
battery chemistries can operate up to
60° Celsius, but we like to be more conservative and under normal conditions
the batteries should be kept
below 50° Celcius.
BVC – Balance Voltage Cutoff = Default Setting
This is to taper the charge current from the EVCC to the Charger. We leave
this in the default setting.
LVC – Low Voltage Cutoff = 3.30-3.35 Volts
This is the voltage at which the BMS goes into Low Voltage Alert. You want
this to be at or slightly above your
discharge voltage of your cell, so while many chemistries will list 3.0 to 3.2
Volts for the discharge floor, we like
3.30 Volts as it’s a little more conservative and will help your pack last
longer with less degradation.
When finished setting up your values, don’t forget to enable the balancing
function, the thermistors,
and lock the configuration. Locking the configuration will cause an alert if
any of the LTCs fail to report.
This can be done with the following commands: enable balance
enable thermistor lock
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