Configuration
After the wiring is complete and you are communicating with the BMS, you can configure the
BMS to work with your group of battery modules. If you purchased your modules along with
the BMS, the configuration should be already completed and locked. If not, then take the
following steps to configure your system.
Start by entering the “update” command
to show all the modules connected to the BMS. If all
the modules in your system are not shown in the list, then plug each module individually into
the BMS and “update” again. Label each module using the listed ID. Use the “set mod”
command (see “Commands” below) to change the ID of one module with an
y duplicate ID. Plug
in all the modules again and enter
“update” to verify all are present.
Once the modules are verified
, enter the “lock” command
to save that set of module IDs. After
this step, the HLS and LLS limit switches will be active.
To change the HVC and LVC values, u
se the “set” command
(below). If changed, also set the
HVCC and LVCC values. Set the HVCC approximately 0.1 volt below the HVC value, and set the
LVCC value 0.1 volt above the LVC value.
High & Low Limit Switches
The BMS has two limit switches that can be used to control other devices. Both the HLS (High
Limit Switch) and the LLS (Low Limit Switch) are open collector outputs found on many
electronic devices. They behave like a normally open switch which is connected to ground when
activated.
The method for controlling a specific external device depends on features supported by that
device. Many devices have a control/enable input that can be activated directly by a limit
switch from the BMS. If no such options are available, you can also use a limit switch to trigger
a large relay or contactor, indirectly disconnecting the other device from its power. In most
cases the HLS would be used to control a charger or charge controller and the LLS would be
used to control whatever you are trying to power, such as a motor controller, AC inverter, LEDs,
buzzer, etc.
Commands
The following commands are available in the VC1
–
these are not case sensitive.
•
“update”
displays a list of connected modules and their ID values
•
“show
cells
”
lists the connected set of modules along with module cell voltages
•
“
show
config”
shows the list of configuration settings
•
“debug”
shows a list of errors useful for troubleshooting
•
“lock”
saves the current pack ID list (required for operation)
•
“set”
sets parameter values
, using “set (parameter) (value)”
-
Example: “set hvc 3.
5
5”
•
“set mod”
used to change a module ID. Example: change 3 to 9
, enter: “set mod 3
9
”
•
“enabled”
sets LS output logic. Default is closed when enabled. Example: to set HLS
open
when enabled: “set HLS enabled
open
”
( “HLS”
is
case sensitive on early versions)
•
“help”
lists the command options available to the user
