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We use a thermistor expansion module that we attach to the ORION via CAN.
The thermistor expansion module connects via the CAN HIGH and LOW on the MIO3 connector shown above (top left) . The connection is already shielded with insulation and requires a 120 ohm resistor between CAN HIGH and CAN LOW.
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There are in total 36 available voltage taps. We use 32 of those. There are 40 connections in total where 1 is not used (N/A)
The voltage taps are divided into 3 groups: each with 12 taps and a negative tap.
The taps are hooked up onto each module like this:
The –1 tap is on the lowside of the entire battery. Tap 1 and –1 measure first cell, tap 1 and 2 measure second cell and …
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Programming the ORION: We use the ORION CAN adapter to program the ORION, we hook up a VGA cable and connect it to the VGA female head that we soldered onto the ORION CAN cables.
To power the ORION, attach 12V to the Ready Power and GND shown above. This can also be used with a WAGO block to power the thermistor expansion module too. Download the ORION BMS 2 Control application and program away.
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Discharge Current Limit (DCL):
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- Discharge Limits is where we set limits for discharge current/temp. Our hard temperature range is –20 to 60 celsius.
- The derate settings for state of charge don’t matter(implement state of charge later).
- The derate settings for temperature also aren’t too important, as long as the blue line labeled Temperature Discharge limit is 75 and within our temperature range
Charge Current Limit (CCL)
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- Charge Limits are set for charge current limits. Our temperature range here is a hard –20 to 45 celsius. Our current limit is also 20 amps
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