YKN-BMS4S Bluetooth BMS 4S LiFePO4 Battery Protection Board 150A Smart BMS with CAN RS485 for Energy Storage

Product Overview
The YKN-BMS4S is an intelligent battery management system (BMS) protection board designed specifically for 4‑series lithium iron phosphate (LiFePO4) battery packs. Integrating advanced hardware protection, active balancing, and multiple communication interfaces—including Bluetooth, RS485, and CAN—it provides comprehensive monitoring and control for small to medium energy storage systems, 12V lead‑acid replacement batteries, solar street lights, and other low‑voltage applications. Its compact design, low power consumption, and flexible parameter configuration make it an ideal choice for OEMs and system integrators seeking reliable, smart BMS solutions.

Key Functional Features

• 4S LiFePO4 Dedicated Design – Optimized for 4‑series LiFePO4 cells with precise voltage thresholds and protection logic.

• Comprehensive Hardware Protections – Overvoltage, undervoltage, overcurrent, short circuit, high temperature, and low temperature safeguards ensure battery safety in all operating conditions.

• Intelligent Cell Balancing – Configurable balance start voltage and voltage difference; supports charging balancing or static balancing to maintain cell uniformity and extend pack life.

• Multi‑Point Temperature Monitoring – 4 channels for battery cell temperature sensing plus 1 channel for power device temperature monitoring, enabling proactive thermal management.

• Versatile Communications – Integrated Bluetooth for local mobile monitoring, plus RS485 and CAN bus for integration with inverters, displays, and remote management systems.

• Heater & Buzzer Support – Reserved interfaces for optional heating pads and audible alarms, allowing adaptation to cold environments and fault notification.

• Ultra‑Low Power Consumption – Sleep mode reduces current draw to <300µA, preserving battery charge during long idle periods.

• Scalable Architecture – Supports series and parallel connection of multiple BMS units, enabling larger battery banks with unified management.

  Ideal Applications

  • Small to medium energy storage systems (ESS)

  • 12V LiFePO4 drop‑in replacements for lead‑acid batteries

  • Solar street light battery packs

  • Electric mobility (scooters, golf carts, low‑speed vehicles)

  • Telecom backup battery packs

  • Marine and RV auxiliary battery banks

  • Any 4‑series LiFePO4 battery requiring smart monitoring and protection

  Customization & Integration Support
  We offer tailored BMS solutions including parameter presets (voltage thresholds, balance settings), communication protocol adjustments, connector types, and enclosure options. Our engineering team provides technical documentation, configuration software, and integration support to ensure seamless compatibility with your battery pack design.

  Technical parameters
  Basic parameters
  Cel specifications		4 series of lithium iron phosphate cells
  Interface type		Charge and discharge are both at the same port
  Charging Voltage		14.6V
  Cell voltage range		9.6~15V
  Continuous charging current		≤150A
  Continuous discharge current		≤150A
  Consumption of running		≤25mA
  Consumption of sleep		≤300uA
  Operating temperature		-30℃~75℃
  Size(L*W*H)		160mm*95mm*25mm