JFBMS32

32S Smart BMS 

Specifications

• Cell Configuration Range: 3–32S
• Maximum Continuous Charging Current:
  • Up to 20A with aluminum case
  • Up to 10A without aluminum case
• Balancing Current: 48 mA at 4.2 V
• Built-in Suppression Circuit: Protects against voltage spikes when connecting the charger
• Charge Port Protection: Mosfets disconnect battery +
• Quiescent Current (Sleep Mode): 15 µA at 130 V

System Type

• Type: Charge-only Smart BMS
• Designed for: Seamless integration with the VESC ecosystem

VESC Integration

• Isolated CAN Bus: Ensures stable, real-time communication with the VESC
• Supports safety features such as:
  • Beeps
  • Pushback
  • Auto-shutdown

Connectivity

• Bluetooth & WiFi: For wireless diagnostics, configuration, and OTA (Over-the-Air) firmware updates
• Plug-and-Play Setup: Easily configurable using the VESC Tool (mobile or desktop)

Monitoring Capabilities

• Compatible Chemistries: Li-Ion, Li-Polymer, and LiFePO₄
• Monitored Parameters Include:
  • State of Charge (SoC)
  • Energy Usage (Amp-hours and Watt-hours)
  • Individual Cell Voltages
  • Pack and Charger Voltage
  • Charging Current

Temperature Monitoring

• Internal Sensors:
  • One integrated sensor per balancing IC
  • Two dedicated sensors for charge and discharge MOSFETs
• External Sensors: Supports up to 4 sensors via 2-pin JST GH connectors

I/O and Interfaces

• XT30 connectors for battery and charger
• JST GH connectors (side entry):
  • 2-pin for external temperature sensors
  • 6, 8, 9, and 10-pin for cell balancing leads
• Built-in Buzzer for audible system alerts
• Automatic Wake-Up & Sleep Modes for low-power operation

Physical Dimensions

• Board Size: 110 × 32 mm

This product includes

• JFBMS32
• XT30 male and female connector
• JST GH 4 pin connector with 20cm wires for CANbus
• JST GH Teflon wires (40cm) – 2, 6, 8, 9, and 10-pin
• 4 thermistors
• personalized tuning session with our EV specialists to optimize performance for your specific setup.

Hardware Changelog

You can identify which hardware version you have by scanning the QR code on the back of the board — it will indicate the batch/version.

B02 — Current Version

• Shutdown support added — the board now supports a hardware shutdown signal
• Conformal coating applied — the PCB is fully conformal coated for improved moisture and environmental protection

B01

• No shutdown support
• PCB not conformal coated