Orion Jr. BMS Manual
–
Rev. 2
2
Table of Contents
SAFETY: READ THIS FIRST ................................................................................................................ 4
Determining which BMS to order ........................................................................................................ 7
Overview of Theory of Operation ........................................................................................................ 8
Mounting .............................................................................................................................................. 9
Physical Mounting .................................................................................................................................................................... 9
Thermal Information ................................................................................................................................................................. 9
Wiring the BMS .................................................................................................................................. 10
Interfacing the Load and Charger with the BMS .............................................................................. 11
Current Limiting via the digital CANBUS (CAN-enabled units only) ....................................................................................... 11
Current limiting via the analog voltage outputs. ...................................................................................................................... 12
Current limiting via an on/off signal from the BMS. ................................................................................................................. 12
Notes for specific applications ................................................................................................................................................ 12
Digital RS232 Serial Communication ............................................................................................... 13
Straight Through Pinout ......................................................................................................................................................... 13
Mating Connector Part Numbers ............................................................................................................................................ 13
Main Input/Output (I/O) Connector ................................................................................................... 14
Wiring Main Connector ...................................................................................................................... 16
Fusing .................................................................................................................................................................................... 16
Power Supplies ...................................................................................................................................................................... 16
LED Status Light .................................................................................................................................................................... 18
Wiring CAN interfaces ............................................................................................................................................................ 18
Wiring digital signal outputs .................................................................................................................................................... 19
Checking open drain outputs .................................................................................................................................................. 23
Wiring the multipurpose input ................................................................................................................................................. 23
Wiring the analog 0-5V outputs .............................................................................................................................................. 23
Thermistors (Pins 10, 12, 16, and 8) ...................................................................................................................................... 24
Wiring Voltage Taps ........................................................................................................................... 25
Safety Disconnects and Fuse Position ................................................................................................................................... 28
Current Sensor ....................................................................................................................................................................... 29
Wiring for high impedance cables and busbars ...................................................................................................................... 31
Skin effect issues due to AC currents ..................................................................................................................................... 32
Transients ............................................................................................................................................................................... 33
Wiring Errors .......................................................................................................................................................................... 34
Voltage tap harness lengths ................................................................................................................................................... 34
Internal Isolation ..................................................................................................................................................................... 35
Fuses on voltage tap wires ..................................................................................................................................................... 35
Physical routing and installation of wires ................................................................................................................................ 35
Verifying Cell Voltage Tap Wiring...................................................................................................... 36