JKBMS JK-B2A25S-RP 8S-25S 2A Active Balance Smart BMS | RS485 & CAN | LiFePO4 Li-ion LTO | Relay BMS

JKBMS JK-B2A25S-RP — High-Capacity Active Balance Smart BMS (Relay Type)

The JKBMS JK-B2A25S-RP is a purpose-built Battery Management System designed for large-capacity series lithium battery packs. Featuring supercapacitor-based active energy transfer balancing at up to 2A continuous, built-in Bluetooth, RS485, and CAN interfaces, it delivers comprehensive protection and precision monitoring for demanding ESS and industrial applications.

🔋 Key Specifications

• Cell Configuration:
  • Li-ion (NMC): 8S – 25S
  • LiFePO4: 8S – 25S
  • LTO (Lithium Titanate): 12S – 25S
• Output Type: Relay (charge / discharge / pre-discharge relay control, 12V drive)
• Power Supply: Self-powered (battery pack) or external supply, 16V–100V
• Active Balance Current: 2A continuous (supercapacitor-based energy transfer)
• Post-Balance Cell Voltage Difference: ≤5mV
• Single Cell Voltage Range: 1V – 4.5V | Accuracy ±5mV
• Temperature Probes: 3× NTC supported
• Heating Support: Up to 5A heating current
• Coulomb Counter: Supported
• Shunt Specification: Configurable via APP

📡 Communication & Interfaces

• Bluetooth: Built-in — monitor cell voltage, balance status & configure parameters via JKBMS App (Android & iOS)
• RS485: Standard — 485_A / 485_B with GND-TR
• CAN Bus: Standard — default CAN_H / CAN_L
• GPS Interface: Optional port
• LCD Display Interface: Optional port (P3)

⚡ Power-On Instructions

• With display screen: Press and hold the power button on the display screen for 1 second to power on.
• Without display screen: Insert the included activation switch plug into the display interface (P3), then press and hold the activation switch for 1 second to power on.

⚙️ Protection Features

• Overcharge & over-discharge protection (configurable via APP)
• Overcurrent protection (configurable via APP)
• Short circuit protection
• Low voltage shutdown (prevents over-discharge damage)
• ACC ignition switch support (key-start discharge control)

🌡️ Operating Conditions

• Operating Temperature: -20°C ~ 70°C
• Power Input: 16V – 100V (battery self-powered or external supply)
• Max Power Consumption: 1.5W (BMS board, excluding relay)
• Standby (Shutdown) Power: 20mW

✅ Ideal Applications

• Solar energy storage systems (ESS) & base station backup power
• Electric sightseeing vehicles, forklifts, shared EVs
• High-power energy storage & industrial battery packs
• Battery balancing, repair & maintenance
• DIY large-capacity lithium battery packs

📦 Package Contents

• 1× JKBMS JK-B2A25S-RP BMS board
  
• Cables & connectors as specified

⚠️ Note: This is a relay-type BMS. The external relay (12V drive) is NOT included and must be sourced separately by the customer.