Bender ISO165C for Isolation Monitoring

[DrJeff]

I've posted some prototype and demo code to my github to use the Bender ISO165C unit.

https://github.com/DrJeffCooke/IsolationMonitorBender

The unit measures the isolation of an EV system (effectiveness in kOhms of the insulation) and also two high voltage readings. It then reports these in CAN.

https://www.benderinc.com/products/grou ... -iso165c-1

I'm using the insulation monitoring as a safety measure and the high voltage readings as a means of monitoring that the high voltage contactors are working as expected (in particular that the pre-charge contactor has operated correctly before the main positive contactor is closed).

I thought this might be an interesting set of data for those working on conversions and interested in additional safety measures. I still have some more testing to do to confirm that the ISO165C will work while fully integrated with the Tesla Charger and Tesla Drive Unit. I don't anticipate issues, but the Bender documentation does state that more than one ISO165C units would be an issue.

If I were doing this again I would have selected the ISO165C-1 which can output directly to a warning and fault line. Using the ISO165C you have to interpret CAN frames to detect a fault or warning condition. The units also come with pre-programmed CAN speeds which may be a limitation. Thankfully my unit runs at 500kps (contrary to the documentation) which is the speed the TesLorean CAN network is running at.

Jeff

[boekel]

Pretty cool unit. do you know prices?

[SciroccoEV]

I talked to them at CENEX LCV and the prices were reasonable, sub £200 as I recall.

[boekel]

These seem to have disappeared, does anyone know if they stopped making them or just put them on the 'not public' list?

[Bigpie]

https://www.benderinc.com/products/grou ... 04-series/ what you're looking for?

[boekel]

https://www.benderinc.com/products/grou ... 04-series/ what you're looking for?

unfortunately that is missing much of the features (CANbus, 2x voltage measuring..)