BMS
+XR, HW: 4209, PCB v2.0.5
PIC16F1788-I/MLRISC 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
PROG1pinout:SN65HVD1786RS-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
MAX14921battery measurement analog front-end- controlled by an SPI interface
- Datasheet: MAX14920-MAX14921.pdf
020N08N5MOSFETCSD19536KTTpower MOSFETLM393-Nvoltage comparator- Datasheet: lm393-n.pdf
VP1786(SN65HVD1786D) transceiver- Datasheet: sn65hvd1791.pdf
3920R 1L00 1% 1846current sense resistor- Datasheet: 2629492.pdf
Connectors
- Amass XT60PW connectors for battery / controller power (note reversed polarity for battery connector)
- JAE ES9 male (on PCB) / female (on wire) connector for charger cable
- https://www.digikey.com/en/products/detail/jae-electronics/ES9S002SZA/4867382
- https://www.digikey.com/en/products/detail/jae-electronics/ES9P002VFZR1600/4867376
- JST GH 6-position female header used for connector to controller
- https://www.digikey.com/en/products/detail/jst-sales-america-inc/BM06B-GHS-TBT/807804
Hardware version and PCB revision combinations
Note: This is based on very small sample size. (Currently about 10 boards.)
+XR
| Hardware version | BMS PCB revision | Controller PCB revision |
|---|---|---|
| 4209 | v2.0.4 - v2.0.5 | r2.9 |
| 4210 | v2.0.7 | ? |
Pint
| Hardware version | BMS PCB revision | Controller PCB revision |
|---|---|---|
| 5300 | v2.0.7 | r3.1.3 |
| 5314 | v2.0.7 | ? |
Balance port pinout
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.