KXKM_Batterie_Parallelator/firmware-idf/sdkconfig.defaults.48v at main - KXKM_Batterie_Parallelator - L'Électron Rare — Forge

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L'électron rare 80cfa134a6 feat(firmware): 48V pack class for 13s packs

Add a Kconfig voltage-class choice (BMU_PACK_CLASS: 24V default /
48V) plus an sdkconfig.defaults.48v overlay, implementing lot 4 of
the 48V design note.

48V class defaults: min 44600 mV (3.43 V/cell, same fleet policy
as 24V), max 55200 mV (charger CV 54.6 V + 600 mV margin),
imbalance 2000 mV (x13/7), VRM SOC window 44600-53500 mV.

Blocking fixes found while implementing:
- bmu_protection: plausibility guard rejected any reading above
  35 V as an I2C glitch -> class macro BMU_V_PLAUSIBLE_MAX_MV.
- bmu_ina237: BOVL/BUVL hardwired 30000/24000 -> programmed from
  runtime thresholds (NVS/Kconfig) at init; log real values.
- bmu_ble control + display steppers: hardcoded 20-30/25-35 V
  setting bounds rejected any 48V config -> class-derived macros
  BMU_VMIN/VMAX_SET_FLOOR/CEIL_MV in bmu_config.h.
- bmu_ui_detail: chart autoscale seeds 35000/15000 broke above
  35 V -> neutral 65535/0.
- bmu_ble_victron: SOC window hardcoded 24.0/28.8 -> reads the
  VRM Kconfig (class fallback when VRM disabled).
- legacy firmware/src/config.h: BATTERY_PACK_CLASS_48V ifdef.

Validated: idf.py build green for both classes (esp32s3, isolated
sdkconfig; 48V generates 44600/55200/2000), no new warnings in
touched files, legacy sim-host tests 13/13 pass. NVS erase needed
when reflashing a board that has 24V thresholds persisted.

2026-07-07 16:05:43 +02:00

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 # Overlay classe 48 V (packs 13s Li-ion, hardware BMU-v2-48v).
 # Build :
 #   idf.py -DSDKCONFIG_DEFAULTS="sdkconfig.defaults;sdkconfig.defaults.48v" build
 # (supprimer le sdkconfig existant ou effacer la NVS si des seuils 24 V
 #  y sont déjà persistés — cf. CLAUDE.md "Erase NVS")
 CONFIG_BMU_PACK_CLASS_48V=y