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On 03/07/2023 16:56, apotorski@... wrote:

I have been given the task of scaling down a 50V lithium ion battery to 24V. I think I have successfully uploaded both schematics and the PWL file in a zip file. The 50V schematic seems to work fine, the battery discharges to 0V after a certain amount of time. I was able to upload the 24V battery specs in the form of a table to a new voltage dependent voltage source, but I did not change any other component values and I did not change the PWL file. I run the simulation and the battery voltage never gets to 0V. I might not understand the function of the PWL file at the independent current source. My end goal is to get the 24V simulation working correctly by seeing the battery discharge to 0V and also understanding the purpose/function of the PWL file at the independent current source. I am not an electrical engineer, but want to try my best to understand my task. Anyone's help is much appreciated.

Yes, the 24V battery doesn't discharge because the 24V characteristics table is messed up. The X values (SOC) should go from 0 to 1. It actually goes from 1.98 to 99.85. The Y values (voltage) should go from 0 to ~24+. Instead, they go from 28 to 18.

Summarising, it looks like the X values are 100X too big, i.e. are in % and not decimal, and the Y values go in the wrong direction. So the table for your 24V battery is actually a SOD (state of discharge) instead of SOC (state of charge).