It would be safer to use a electronic load, I have used a Tenma 72-13210 120V 300W to discharge batteries to a known voltage, it took quite a while at only 300W though.

A suggestion to produce a Polestar 2 bms solution. ISOSPI Arduino shield DC2617A from Analog Devices, combined with UNO R4 (or some other controller) would make a nice CAN bus BMS, the only thing missing would be a 5V psu. This would provide full cell monitoring, balancing and temperature monitoring...

I have analysed log file 'Nissan leaf 62kwh driving , burst of acceleration v2.csv' from https://github.com/dalathegreat/EV-CANlogs/tree/main/Nissan%20LEAF/62kWh This is a 160kW inverter in a stock leaf. I assume 110kW is the same. Outside ambient 11.5C (from 0x54c) message 55a byte 0 always 0 byte ...

I have done some testing my 110W inverter. As you have seen unplugging the coolant sensor changes byte 3, which which according to the DBC (I have) is IGBTDriverBoardTemperature, the DBC file is incorrect (at least for gen3). The scaling for the coolant sensor is degC-40 (same as temperature scaling...

I now have communication with the BMS slave modules (via isoSPI) working. I am using my own custom hardware (with LTC6820) and hacked Simpbms software. So far I can read all cell voltages (96 cells) and temperatures (48 2 per module). Todo: Calibrate battery temperature sensors. I need a thermal cha...

Continue this thread. Someone seems to have opened the communication with 78kwh battery(BYD emulator releaced). But how about the smaller 69kwh, do we have any evidence the communication is the same? Is it possible to swap these batteries? Car with 69kwh battery and change to 78kwh? At this time lo...

Hi, would you share what's the configuration? Is it known which cells are used? Thanks The modules are 4S3P, (3P was found online somewhere) 196.2Ah, either 24 or 27 modules per battery (69kWh or 78kWh). I don't know what type of cells are used, nominal voltage is 14.68V if that helps. I don't inte...

I did find this: https://www.ennoid.me/bms/gen-1 I don't know how suitable it would be for home ESS, it works with LTC6811 and LTC6813 slave modules so I expect it would work with Polestar LTC6812 slave modules. The hardware and firmware are open source, so it should be possible to make it work. The...

I have a 69kWh Polestar battery (only modules, bms slaves, bus bars and cables, no case or contactors) 24 modules 2.88kWh 390mmx152mmx110mm 13.1kg, cell tap connector TE 936348-1. 8 BMS slave modules LTC6812 based (ISOSPI interface), connectors JAE MX77D040HF1 MX77A004HF2 MX77A004HF3 The bms slaves ...

2019 Leaf PDM
The wire with the black tape (in the picture) connects to L1 on the type 2 charge connector. The polarity of the AC connection should not matter really, unless the PDM does an continuity check between PE and neutral, like Renault's do.

Are these Pin 8 (Violet) Quick Charger Relay +ve and Pin 24 (Sky Blue) Quick Charge Relay -ve? On the 2018 models, these are controlled by the VCM in relation to the Chademo charging. Not sure if it is as simple as putting 12 volts across them. Diagram attached, Page 2, 5, and 13. Yes for 2018 mode...

In our setup (gen 2) we are not relying on the pdm for any communication due to the zombieverter taking charge of this, so could we bypass that logicboard and wire direct to the contactor relay coils? You could bypass the logic board and wire directly to the contactors, or possibly make a cable fro...

PaulHeystee wrote: ↑Wed Mar 22, 2023 11:07 amLeaf Gen2

Its is gen 3, from a 2019 110kW Leaf (I assume that is gen 3), sorry for any confusion. Maybe gen 2 is the same, I have a PDM from an eNV200 (don't know the year) maybe that is gen 2, if so I will open it and have a look.

I have had a good look at the gen 3 Chademo logic board (YEAP01D478Ac), attached is the circuit (possibly with some errors) Edit attached picture for reference I have powered up the voltage sensor and it works as follows: PDM connector 4 sensor gnd 2 sensor output, pullup to 12V or 5V if using an an...

As least for gen 3 PDM the quick charge relays are connected as follows: Edited after a closer look at the logic board, and further edited after releasing i have a gen 3 PDM (from 2019 110kW leaf) PDM connector pins: 5 relay plus&minus 0V also connects to PDM case 8 relay minus +12V 24 relay plu...