Orion Thermistor Expansion Module

Orion Thermistor Expansion Module – Scalable Thermal Monitoring for Complex Battery Systems

More Sensors. Better Insights. Safer Systems.

The Orion Thermistor Expansion Module is a dedicated add-on for the Orion 02 and Orion Jr. BMS platforms, designed to significantly increase thermistor input capacity for advanced thermal monitoring in large or distributed battery packs. Whether you're managing multi-module EV battery systems, stationary ESS, or marine/industrial lithium banks, this expansion module gives your Orion BMS the ability to track and respond to temperature data with greater resolution and reliability.

🌡️ Key Features & Benefits:

• Adds 80 Additional Thermistor Inputs per module

• CAN-Based Communication – Seamlessly integrates with Orion BMS systems over CAN 2.0B

• Real-Time Temperature Feedback – Supports Orion’s intelligent over-temperature protection, passive balancing logic, and fault handling

• Daisy-Chain Capable – Use multiple modules for large-scale battery systems

• Compact & Mountable Enclosure – Designed for integration into distributed pack layouts

• Plug-and-Play Compatibility with Orion BMS Jr. 02 and Orion 02 platforms

🔩 Technical Specifications:

• Communication Protocol: CAN 2.0B (11-bit or 29-bit ID support)

• Thermistor Compatibility: 10k NTC (Beta 3435 standard, others via calibration)

• Input Capacity: 80 thermistor channels per expansion module

• Voltage Supply: 9V–32V DC

• Power Consumption: <1W typical

• Mounting: 4-hole flange mount with vibration-resistant housing

• Dimensions: 6.5” x 4.2” x 1.5” (L×W×H)

🛠️ When Should You Use It?

• Battery systems with distributed modules or multiple parallel strings

• Applications requiring precision thermal control (marine, off-grid solar, aviation, R&D)

• High C-rate systems with dense thermal zones or active cooling loops

• Packs exceeding the default thermistor input capacity of the Orion base unit

⚙️ Typical Applications:

• High-Voltage EV Conversions with distributed packs

• Energy Storage Systems (ESS) using cabinet or rack-based cells

• Marine Propulsion Systems with multi-bank lithium setups

• Battery Research Labs needing granular thermal data

• Heavy-Duty Industrial & Utility Platforms

🧠 Powered by Orion. Delivered by EVSource.

At EVSource.com, we carry genuine Orion Thermistor Expansion Modules, fully tested and ready to integrate. We provide wiring guidance, CAN configuration support, and complete system design services to ensure your battery’s thermal health is protected—cell by cell.

🔧 Optional Add-Ons:

• Pre-Calibrated Thermistor Harnesses – Reduce wiring complexity

• CAN Wiring Kits – Shielded cable kits for clean integration

• Mounting Brackets & Heat Sink Panels

• Custom Integration Support – Need help mapping sensors to pack layout? We’ve got you covered.

🌡️ Protect Your Pack with Pro-Level Thermal Awareness.
Expand your system with the Orion Thermistor Expansion Module, and never fly blind when it comes to heat management.

Allows connections of up to 80 additional thermistors to the Orion Original and Orion 02 BMS and BMS Junior Systems. (harnesses sold separately)

• Up to 10 modules can be used together supporting up to 800 thermistors.
• Operates with the Orion Battery Management System.
• Communicates with BMS via CANBUS (Programmable).
• Full automotive operating and sensing temperature range (-40C to 80C)

Specifications

Thermistor Expansion Purchasing Guide
Thermistor Expansion Specifications Sheet 
Thermistor Expansion Manual 
Thermistor Expansion Mechanical Module 
Thermistor Expansion CANbus Protocol