Crimp terminal
39-00-0073
Wire gauge range
AWG18-24 stranded
This interface is used to connect the current shunt and the (optional) 10k
Ω
NTC thermistor on the
current shunt to the Battery Controller. The positive operating power is provided in a fused
connection to this connector.
This connection must only be made after all other connections to the Battery
Controller have been made.
Connecting to a Current Shunt
The Battery Controller requires the shunt to be on the high side (positive end) of the battery
stack. The
VSHUNT_REF
signal is used to compensate for the voltage drop in the sense wires as well
as to provide the positive reference for measuring the overall voltage of the stack.
VSHUNT_BAT
and
VSHUNT_LOAD
carry the differential voltage measurement from the shunt.
VSHUNT_BAT
must be closest to
the battery cells and
VSHUNT_LOAD
must be closest to the Stack Fuse so that the measured current
has the correct polarity. Run all three wires close together to minimize outside interference.
Figure 6. Current shunt and Power fuse connection to J7
Table 11. Current Shunt Connector Pin Assignment
Pin
Connection
Description
Connected to Device
1
+VPOWER
Main power supply input
Positive end of the stack or
other power source
2
No Connect
Not Connected
No Connect
3
No Connect
Not Connected
No Connect
4
VSHUNT_LOAD
Differential voltage input; Load side
Load side of current shunt
5
VSHUNT_BAT
Differential voltage input; Battery side Battery side of current
shunt
6
VSHUNT_REF
Voltage reference for voltage
measurement
Battery side of current
shunt
Installation Guide - 2018-10-08, Rev. 2.0
15
