Coulomb
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The Battery Management System chips are essentially "per cell", and there more cells in the long range battery (though not as many as you might think, since they use higher voltage cells in the LR batteries).If ZS EV SR's are being built, but ZS EV LR's are still on shortage, surely the problem must be with the ZS EV LR's batteries and nothing to do with "ic chip or wiring harness" shortages.
So that's one possible reason; the other is that possibly the different chemistries dictates different BMS chips, and it happens that the LR chips are in shorter supply.
But the BMS is just one of about 20 or more ECUs in an EV; I would not have expected it to have a major effect on chip consumption. BMS chips aren't all that high tech either, though they are fairly specialised, unlike microcontrollers that could be used in many other products. I would expect the highest tech chips to be in the shortest supply, since only a small number of companies can manufacture them.
The large new Samsung chip factory in Texas won't be producing chips for another 2 years or so. It takes years to ramp these things up. A fire can "ramp them down" in hours.
Edit: it seems that Intel and Texas Instruments are also making major chip manufacturing investments, encouraged by the US Government's huge infrastructure bill. I'm sure that other plants are being built in other countries too.
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