Cell Interface; Battery Cells - Nuvation Energy NUV300-BC-12 Product Manual

9.2. Cell Interface

9.2.1. Battery Cells

The Battery Cells connector provides cell voltage input and a means for balancing the cells. The cable
wire should be rated for at least 750 mA to survive worse-case currents.
Pins 8, 16, 17, and 18 are No Connect in the Cell Interface - 12 channel model. Pins 2, 4, 6, 8, 10, 11,
12, 13, 14, 15, 16, and 17 are No Connect in the Cell Interface - 12V 4 channel model.
All unused voltage inputs should be tied to the next highest potential voltage sense input. In this
way, all pins should be connected with the exception of pins 8, 16, 17 and 18 in the Cell Interface -
12 channel model and pins 2, 4, 6, 8, 10, 11, 12, 13, 14, 15, 16, and 17 in the Cell Interface - 12V 4
channel model.
The wiring of the battery cell voltage and temperature sensing should be verified
before connecting to the Cell Interface modules. The temperature sensing wires

must be isolated from the cell voltage sensing leads. Although the Cell Interface
includes protective circuitry to make it more resilient to brief wiring errors, the same
circuitry can result in the battery cells being slowly discharged. Over time, these
wiring errors can cause damage to the Cell Interface and/or the cells.
Table 50. Battery Cells: Molex Micro-Fit 3.0 Connector
9.2.1.1. Battery Cell Connector for Cell Interface - 12 channel
Table 51. Cell Interface - 12 channel Battery Cell Connector Pin Assignment
Pin Connection
1 CELL0
2 CELL2
3 CELL4
Document ID: NE-PM-002
Molex 43025-1800
Manufacturer
Housing
Housing material
Circuits
Crimp terminal
Wire gauge range
Description
Bottom reference of Cell Interface
Cell 2 voltage sense
Cell 4 voltage sense
Nuvation Energy Low-Voltage BMS - Product Manual
Molex Incorporated
43025-1800
Nylon UL94V-0
18
43030-0002
AWG20–24 stranded
Connected to Device
Connect to negative terminal of the lowest cell
(Cell 1)
Connect to positive terminal of Cell 2
Connect to positive terminal of Cell 4
155 Rev 1.2, 2021-03-03
Curie Update 1