BMS Info

BMS

PIC16F1788-I/ML RISC CPU
- Datasheet: 40001675C.pdf
- this one sits in between the MAX14921’s SPI interface and exposed contacts on the PCB
- https://www.digikey.com/products/en?KeyWords=PIC16F1788-I/ML
PROG1 pinout:
SN65HVD1786 RS-485 Transceiver (IC5 Marking)
- Datasheet: sn65hvd1786.pdf
- https://eu.mouser.com/ProductDetail/595-SN65HVD1786DR
- Connected to UART on PIC16
- Differential Pair connected to 6-Pin Connecter
MAX14921 battery measurement analog front-end
- controlled by an SPI interface
- Datasheet: MAX14920-MAX14921.pdf
020N08N5 MOSFET
CSD19536KTT power MOSFET
LM393-N voltage comparator
- Datasheet: lm393-n.pdf
VP1786 (SN65HVD1786D) transceiver
- Datasheet: sn65hvd1791.pdf
3920R 1L00 1% 1846 current sense resistor
- Datasheet: 2629492.pdf

Amass XT60PW connectors for battery / controller power (note reversed polarity for battery connector)
JAE ES9 female (on PCB) / male (on wire) connector for charger cable
- https://www.digikey.com/catalog/en/partgroup/es9-series/47166
- https://www.digikey.com/catalog/en/partgroup/es9-series/47164
JST GH 5-position female header used for connector to controller
- https://www.digikey.com/en/products/detail/jst-sales-america-inc/BM05B-GHS-TBT-LF-SN-N/807803

Note: This is based on very small sample size. (Currently about 10 boards.)

Hardware version	BMS PCB revision	Controller PCB revision
4209	v2.0.4 - v2.0.5	r2.9
4210	v2.0.7	?

Hardware version	BMS PCB revision	Controller PCB revision
5300	v2.0.7	r3.1.3
5314	v2.0.7	?

Close-up of the BMS connector pinout and the XT-60 connector

Each pack has 4 10k NTC Thermistors placed in-between cells for temperature monitoring.