JetFleetBMS32 beta testers

32S Smart BMS – Beta Testing Release

The 32S Battery Management System (BMS) is now available for beta testing. This release is intended for early adopters, developers, and experienced users who are comfortable working with experimental hardware.

Specifications

• Cell Configuration Range: 4–32S

• 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

• NTC NRL2104J3435B2F

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 with Li-Ion, Li-Polymer, and LiFePO₄ chemistries

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

⚠️ Important Notice – Read Before Purchasing

This is a beta release intended for testing and development only.

By purchasing this unit, you acknowledge and accept the following:

• You are using this hardware at your own risk

• No warranty or replacements are offered during the beta phase

• Firmware and hardware updates are ongoing

• Your feedback is welcome to support development