Orion BMS 2 Teardown (2023)

Some Backstory:

I was requested to take a look at a modified Orion BMS 2 in order to determine what features were cut on this custom-built version. It was from a company Actia to make a stationary BMS unit for an LTO-based battery pack. The BMS ended up missing a CAN Transceiver, a low-side switch for safety charger power and isolation detection circuit.

In taking this apart you get a masterclass in AEC-Q100 certified parts. This entire device is chalked full of good devices to use in automotive applications!                                                                                                       

Quick Hardware Summary:

1. Microcontroller - dsPIC33EP512GP806

Dual CAN Controller

2. CAN Transceiver - LTC 2875

High noise immunity CAN Controller

3. Low Side Switch

4. Power Supply Section

5. BMS ASIC - LTC 6811-2

6. Isolation Detection 

7. Digital Isolators + Pulse Transformer (ISOSPI)