VANNER
Incorporated
OWNER’S MANUAL
Vanner High Voltage DC-
DC Converter OWNER’S MANUAL
20
Vann-Bus Battery Management
Vanner 80 Series Equalizer and Sensors
A vehicle with 12 and 24 volt loads may be provisioned with the following Vanner parts to permit
dynamic voltage regulation of the HBA.
1. 80 Series Equalizer
When connected to the I/O of the current and voltage/temperature sensors listed below, the 80 series
equalizer utilizes Vanner's MBBM (Model Based Battery Monitoring) algorithm to determine the SOH
(State of Health) and SOC (State of Charge) of the 12 and 24 volt batteries.
The equalizer will communicate the appropriate voltage requirement, based on the battery
manufacturers data, to the HBA which will adjust its output accordingly. The voltage requirement
communicated to the HBA is based on the voltage at the battery terminals, therefore, voltage drop
contributed by the cables and bolted connections is taken into consideration.
Note:
The appropriate battery model must be loaded in the equalizer for maximum accuracy of the
SOH and SOC calculations. Please contact Vanner for a library of batteries that are modeled to
ensure the proper equalizer part number is ordered or the proper battery profile is loaded in memory.
2. Dual Current Sensor (80A/600A)
The dual current sensor, VSS-C80/600, monitors the current flowing into and out of the 24V battery.
3. Single Current Sensor (80A)
The single current sensor, VSS-C80, monitors the current flowing into and out of the 12V battery.
4. Voltage and Temperature Sensor
The voltage and temperature sensor, VSS-VT, monitors the 12V battery voltage as well as the
temperature. It is mounted to the positive terminal of the 12V battery.
See page 21 for the HBA/Equalizer wiring diagram with the addition of the sensors and their pinout
definitions.
Operational Theory
There are two operating modes for the HBA, standalone and battery management. If battery
management is turned off or CAN messages from the equalizer/battery monitor are not received, the
HBA defaults to standalone mode and regulates the output voltage locally at a fixed value.
Note
: the
factory default is 28.5V but is user configurable via the dashboard interface.
In battery management mode, the output voltage reference is adjusted to regulate the output voltage
remotely at the battery. The reference is adjusted at a rate of 0.1V/second. The upper limit of the
reference voltage is 1.0V above the standalone output voltage.
If the battery SOC is 100% or the battery status is quiescent (quiescent is defined as when there is
less than 5 amps going into or out of the batteries), the remote voltage is set to the float voltage
value. Otherwise it is set to the absorption voltage value. The float voltage and absorption voltage
are adjusted automatically with temperature according to a pre-defined curve.
