Battery Swap Cabinet / Station Reference Design
An illustrative reference design for the main control board of battery swap cabinets / stations on the consumption / charging side of PV & ESS: it communicates with the battery-pack BMS in each slot over multiple isolated CAN channels, controls each slot's charger over isolated RS-485, takes binary inputs such as door locks, smoke detectors and temperature through optocouplers, and uplinks to the station controller and operations platform over Ethernet; powered from 24 V inside the cabinet. With many buses inside the slots, every port has common-mode suppression and ESD / surge protection. Each position is marked with the VOOHU parts available, recommended part numbers and package pinouts.
Illustrative PCB ⇄ Schematic
Illustrative top-side view arranged by functional zone (not the actual layout). Red numbered dots mark positions VOOHU can supply. Click a component on the board, an entry in the index below or a part in the schematic to see recommended parts and package pinouts on the right.
Illustrative CAN topology: the MCU UART is converted to a differential signal by isolated transceiver U2, then passes the stage-2 clamp ESD D1 (WHALD30E2B), the signal-line common-mode choke L1 (WHAC-3225B-510U0) and the stage-1 three-pole gas discharge tube GDT1 (WHGT090V1P0A, center electrode to chassis ground) to RJ45 J1; the transceiver's isolated side is powered by the push-pull isolated supply. Termination / bias resistors depend on bus length and node count; only their symbols are drawn, without values.
Board bill of materials
Summarized by position; click any row to locate it on the board above.
| No. | Zone | Position | Ref. | VOOHU category | Recommended part | Availability |
|---|---|---|---|---|---|---|
| 01 | A Slot CAN | Slot CAN RJ45 1×4 ×2 | J1 | RJ45 Connector | SYT561488AB1A3DY1027 | VOOHU |
| 02 | A Slot CAN | CAN GDT ×8 | GDT1 | GDT | WHGT090V1P0A | VOOHU |
| 03 | A Slot CAN | CAN CMC ×8 | L1 | Signal Line Common Mode Chokes | WHAC-3225B-510U0 | VOOHU |
| 04 | A Slot CAN | CAN ESD / TVS ×8 | D1 | TVS ESD | WHALD30E2B | VOOHU |
| 05 | A Slot CAN | Isolated CAN transceivers ×8 | U2 | — | — | Non-VOOHU |
| 06 | B Slot RS-485 | Slot RS-485 terminals ×8 (chargers) | J2 | — | — | Non-VOOHU |
| 07 | B Slot RS-485 | RS-485 GDT ×8 | GDT2 | GDT | WHGT090V1P0A | VOOHU |
| 08 | B Slot RS-485 | RS-485 CMC ×8 | L2 | Signal Line Common Mode Chokes | WHAC-4532A-510U0 | VOOHU |
| 09 | B Slot RS-485 | RS-485 ESD / TVS ×8 | D2 | TVS ESD | WHALD30E2B | VOOHU |
| 10 | B Slot RS-485 | Isolated RS-485 transceivers ×8 | U3 | — | — | Non-VOOHU |
| 11 | B Slot RS-485 | Push-pull driver + rectifier / LDO | U4 | — | — | Non-VOOHU |
| 12 | B Slot RS-485 | Push-pull isolation transformer | T1 | Push-Pull Transformers | WHST06K02A0 | VOOHU |
| 13 | C Ethernet / binary inputs | RJ45 port (station control / platform) | J3 | RJ45 Connector | WH56A31882021103 | VOOHU |
| 14 | C Ethernet / binary inputs | Eth uplink GDT | GDT3 | GDT | WHGD090V1P0B | VOOHU |
| 15 | C Ethernet / binary inputs | 10/100 LAN transformer (high isolation) | T2 | LAN Transformers | WHSH16F01D4 | VOOHU |
| 16 | C Ethernet / binary inputs | Eth uplink ESD | D3 | TVS ESD | WHALD03G4U | VOOHU |
| 17 | C Ethernet / binary inputs | 10/100 PHY | U5 | Ethernet PHY | JL1101BR-NI | VOOHU |
| 18 | C Ethernet / binary inputs | Binary input terminal | J4 | — | — | Non-VOOHU |
| 19 | C Ethernet / binary inputs | DI ESD | D4 | TVS ESD | WHALD30E2B | VOOHU |
| 20 | C Ethernet / binary inputs | Optocoupler-isolated inputs | U7 | — | — | Non-VOOHU |
| 21 | D Control core | MCU (slot management) | U1 | — | — | Non-VOOHU |
| 22 | E 24 V power | 24 V in-cabinet power terminal | J5 | — | — | Non-VOOHU |
| 23 | E 24 V power | Bidirectional input TVS | D5 | TVS ESD | WHTB058VA | VOOHU |
| 24 | E 24 V power | Input power-line common-mode choke | L3 | Power Line Common Mode Chokes | WHAL-7060A-102T0 | VOOHU |
| 25 | E 24 V power | Buck converter (24 V → 5 V) | U8 | — | — | Non-VOOHU |
| 26 | E 24 V power | Buck converter (5 V → 3.3 V / core) | U9 | — | — | Non-VOOHU |
| 27 | E 24 V power | Molded inductors ×2 (DC-DC) | L4 L5 | Molded Inductors | WHYT0630 Series | VOOHU |
Resources & downloads
Board bill of materials
Reference designators, zones, VOOHU categories, recommended parts and availability for all 27 positions. Opens directly in Excel.
Datasheet collection
Datasheet PDFs for the VOOHU parts recommended on this board.
Design files & footprint library
Schematic, PCB, and VOOHU part footprints and 3D models.
Coming soonRequest the battery swap cabinet / station reference design full package
Includes the full-board position list, datasheets for the recommended VOOHU parts and position-by-position selection notes. For selection advice tailored to your slot count, bus topology (independent per slot / daisy-chained) or protection level, please include it in your requirements. We reply within 24 hours on working days.
