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Battery

To charge the battery with a bench power supply, see this tutorial: Cómo Cargar una Batería de Litio con una Fuente

The main pack uses Molicel P42A cells in a 13S4P configuration, providing a nominal voltage of about 48 V. A separate 12 V car battery supplies the sensors to remain compatible with the Formula Student car.

For battery placement rationale see the FAQ.

Parameter Value
BMS Cutoff voltage 39.0 V (13 * 3.0V)
Configuration 13S4P (13 cells in series, 4 in parallel)
Nominal voltage 48 V
Maximum charging voltage 54.6 V (13 * 4.2V)
Minimum voltage 41.6 V (13 * 3.2V)
Power Capacity 808 Wh (3.7V * 4.2 Ah * 13 * 4)
Charge capacity 16.8 Ah (4 * 4200 mAh)
Maximum continuous discharge current 180 A (4 * 45 A. 9828W at 100% charge!!)
Maximum continuous charge current 32 A (4 * 8 A. about 1.7kW)
Cell type Molicel P42A
Cell capacity 4200 mAh (4.2 Ah)
Cell nominal voltage 3.7 V
Cell maximum voltage 4.2 V
Cell minimum voltage 3.2 V

BMS

  • Jiabaida BMS, 100A BT UART, NMC 6S-21S
  • https://www.notion.so/BMS-Bater-a-Kart-JBD-16078747314380e68688c3ab787fc1f7?pvs=21
  • https://es.aliexpress.com/item/1005007223779359.html https://jiabaida-bms.com/blogs/content/jiabaida-sp22s003b-smart-bms-wiring-diagram?spm=a2g0o.detail.1000023.4.58c53GRk3GRk3N