JK BMS

JK BMS is not just another battery monitor—it is the command center for your energy storage system, turning raw cell data into actionable intelligence.

If you manage a lithium-ion battery pack for solar, RV, marine, or off-grid applications, you already know the cost of guessing. Voltage drift, cell imbalance, temperature spikes—each variable can silently degrade cycle life or trigger a safety event. JK BMS closes that gap by giving you real-time, per-cell telemetry directly from your JK Battery Management System to your Android device. No cloud subscription. No proprietary hub. Just raw data, delivered over Bluetooth or Wi-Fi, parsed into a dashboard that actually makes sense.

Core Telemetry & System Monitoring

The app connects to JK BMS hardware via BLE 4.0+ or local Wi-Fi network. Once paired, the main screen displays a live overview of your entire battery bank: total pack voltage, current draw (positive for discharge, negative for charge), state of charge (SOC) in percentage, and remaining capacity in amp-hours. Below that, a scrollable list shows every individual cell voltage in your series string—accurate to ±0.005V. You can sort cells by voltage, flag outliers, and set custom high/low alarms that trigger a notification on your phone before the BMS initiates a protective disconnect.

Parameter Configuration & Calibration

Beyond monitoring, JK BMS gives you write access to the BMS’s internal parameters—no laptop required. Adjust charge/discharge current limits, cell over-voltage protection thresholds, low-temperature cutoff, and balancing start voltage. The app includes a step-by-step wizard for initial setup based on your battery chemistry (LiFePO4, NMC, LTO, etc.), but advanced users can override every value manually. All changes are written to the BMS controller in real time, and the app logs each modification with a timestamp for audit trail purposes.

Data Logging & Historical Analysis

Automatic logging runs in the background, recording pack voltage, current, SOC, and min/max cell voltage at configurable intervals (1 second to 1 hour). The built-in chart engine renders these logs as interactive line graphs—pinch-to-zoom, pan, and export to CSV for offline analysis in Excel or Google Sheets. You can overlay multiple parameters on the same timeline (e.g., voltage vs. current during a heavy load event) to diagnose performance bottlenecks or verify that your charging profile matches the manufacturer’s specification.

Multi-Device & Multi-Pack Management

For installations with multiple JK BMS units—parallel packs, solar generators, or ESS cabinets—the app supports simultaneous connections. A device list shows each BMS by name, MAC address, and current status (active, idle, alarm). You can switch between units in under a second without re-pairing, and the app maintains separate parameter profiles per device. This is critical for balancing loads across parallel strings or verifying that all packs are tracking the same SOC during charge/discharge cycles.

Key Advantages

• Zero latency local connection – No cloud dependency means your data stays on your local network; alarms trigger instantly via Bluetooth even when offline.
• Per-cell balancing control – Manually initiate passive balancing on specific cells, or set conditional triggers (voltage delta > 20mV) for automatic equalization.
• Custom alarm profiles – Create separate alarm thresholds for storage, charging, and discharging states; alerts appear as Android notifications with vibration.
• Exportable diagnostic logs – Full CSV export includes timestamps, cell voltages, temperatures (sensor 1 & 2), and MOSFET status for warranty claims or system optimization.
• Low power background mode – App remains connected with minimal battery drain; tested to sustain a Bluetooth link for 72+ hours on a typical smartphone.

Download Mobile App Now

Get your battery data under control—install JK BMS and turn every cell into a measurable, manageable asset. Stop relying on blinking LEDs and start making informed decisions about charge cycles, load balancing, and fault prevention.

Technical Disclaimer: This app requires an active Bluetooth (4.0+) or Wi-Fi connection to a compatible JK BMS hardware controller. Continuous background data logging may increase battery consumption on your device. JK BMS is intended for users with basic knowledge of lithium battery systems; incorrect parameter changes can affect battery safety and warranty. In-app purchases may be available for advanced logging features. Android 6.0 (Marshmallow) or higher is required. Data usage is limited to local network traffic; no personal data is transmitted to external servers unless user-initiated export is performed.