Product Description
LT-P13S127 | Round 38mm 20A BMS for Downtube Batteries
36V / 48V Li‑ion | NTC Thermal Sensors | Switch Functionality | Compact 38mm Diameter
The LT-P13S127 is a specially designed, ultra‑compact round Battery Management System (BMS) with a diameter of just 38mm — perfect for downtube batteries on electric bikes, e‑scooters, pedelecs, and tricycles. Supporting 10S (36V) and 13S (48V) lithium‑ion battery packs, it delivers 20A continuous discharge current. Equipped with NTC thermal sensors, a built‑in power switch, and comprehensive protections (over‑charge, over‑discharge, over‑current, short circuit, over‑temperature), this BMS offers a space‑efficient, reliable solution for tube‑style battery enclosures.
⚙️ Key Features
📏 Ultra‑Compact 38mm Diameter
Designed to fit seamlessly into standard e‑bike downtube batteries and scooter tube enclosures, maximizing space efficiency.
🔋 Dual Voltage Support – 36V / 48V
Compatible with 10S (36V) and 13S (48V) Li‑ion batteries, offering flexibility for different electric mobility applications.
⚡ 20A Continuous Discharge
20A continuous current capability provides reliable power for 250W–750W e‑bike motors, ensuring smooth and efficient rides.
🌡️ NTC Thermal Sensors
Integrated NTC thermistors offer advanced temperature monitoring and over‑temperature protection, preventing overheating and extending battery life.
🔘 Built‑in Switch Functionality
Convenient power switch allows easy on/off control of the battery pack, enhancing safety and user convenience.
🛡️ Comprehensive Protections
Over‑charge, over‑discharge, over‑current, short circuit, and over‑temperature protections ensure safe and reliable operation.
📊 Technical Specifications
- Model: LT-P13S127
- Cell Series Support: 10S (36V) / 13S (48V) Li‑ion
- Diameter: 38mm (round form factor)
- Continuous Discharge Current: 20A
- Charge Current: Configurable (common port)
- Temperature Sensing: NTC thermistors
- Control: Power switch (on/off)
- Balancing: Passive balancing
- Protections: Over‑charge, over‑discharge, over‑current, short circuit, over‑temperature
- Operating Temperature: -20°C to 70°C
- Applications: Downtube batteries, e‑bikes, e‑scooters, pedelecs, tube‑style battery packs
🚲 Applications
🚴 Electric Bikes (E‑Bikes)
Ideal for 36V and 48V downtube battery packs, providing compact integration and reliable performance.
🛴 Electric Scooters
Perfect for tube‑style scooter batteries where space is limited, with 20A current handling for standard motors.
🛺 Pedelecs & Tricycles
Versatile BMS for light electric vehicles requiring a round, space‑saving BMS solution.
🔋 Custom Tube Battery Packs
Excellent choice for DIY builders creating cylindrical battery packs for e‑bikes or other LEVs.
We offer OEM/ODM services for the LT-P13S127 platform – customize current ratings, voltage support, and physical dimensions. Contact our engineering team for sample requests, technical documentation, and volume pricing.
Primary: round BMS · 38mm BMS · downtube battery BMS · 36V BMS · 48V BMS · 20A BMS · LT-P13S127 · e‑bike BMS · NTC sensor · switch BMS · tube battery management · Li‑ion BMS
Performance: 20A continuous discharge · 38mm diameter · supports 10S/13S · passive balancing · over‑charge protection · over‑discharge protection · over‑current protection · short circuit protection · over‑temperature protection · power switch
Applications: electric bicycle · e‑scooter · pedelec · downtube battery · 36V lithium battery · 48V lithium battery · tube‑style battery pack · light electric vehicle
