BMS 8S 300A LFP SMART CAN JK (B2A8S30P) (b6aa)

Overview

The JK‑B1A8S30P, produced by JiKong (JK BMS), is an intelligent battery management system designed for lithium-based packs (Li‑Ion, LiFePO₄, LTO), capable of handling 4 to 8 cells in series (12–24 V nominal). It offers 300 A continuous, with healthy 300 A peak discharge, and features active cell balancing at 1 A per cell.

Key Features

Active Balancing (1 A): Actively redistributes charge to even out cell voltages, maximizing battery life and performance
High Currents: 300 A continuous and up to 300 A peak support demanding applications
In-built Bluetooth: Allows wireless monitoring via JK’s free Android/iOS app. Easy setup and real-time access to cell voltages, current, and alarms
CAN & RS-485 Support (+HC version): Enables integration into larger systems with CANBus or RS-485 communication
Heating Option (HC models): Includes a built-in heating chip for low-temperature charging environments
Comprehensive Protection Suite: Prevents overcharge/discharge, overcurrent, short circuit, cell disconnect, and overheating
Temperature Sensing: Two NTC probes included – monitor and manage temperature throughout the pack
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Technical Details

Cell Count 4–8S LiFePO₄, 3–8S Li‑Ion, 6–8S LTO
Continuous Current 300 A (upgradeable models up to 200 A peak)
Balance Current 1 A active
Dimensions ~153 × 136 × 17.6 mm; Weight ~750 g
Operating Temp. -20 °C to +70 °C (charge limited at high temps)
Voltage Range 12 V / 24 V systems (40–100 V pack voltage)
Power Consumption ~6 mA idle, ~10 mA during balancing

Package Contents

Main JK‑B1A8S30P BMS board
Cell-balancing ribbons & NTC temperature leads
Master ON/OFF switch cable
Optional heating pad interface on HC versions
Bluetooth and CAN/RS-485 connectors
User manual for wiring and app setup

Applications

Electric vehicles (e-bikes, scooters, golf carts)
Energy storage systems
DIY battery packs
Off-grid or low-temp environments (HC version)

Advantages

Extends battery life via efficient active balancing
Real-time health monitoring via Bluetooth app
Flexible connectivity with CAN/RS‑485
Enhanced cold climate usability (heating option)
Compact, durable build suitable for rugged use