Overview
JKBMS JK-BD6A20S10P is an active balance smart BMS for Li-ion, LiFePO4, and LTO battery packs, supporting 7S-20S (Li-ion), 8S-20S (LiFePO4), and 12S-20S (LTO). It provides 0.6A active balancing (Full State On), 100A continuous charge/discharge current, built-in Bluetooth for Android/iOS, and RS485 communication (default). Wiring output is Common Port (Same Port).
Key Features
- Active balance method: Active Balance (Full State On)
- Balance current: 0.6A (600mA)
- Built-in Bluetooth module; supports Android / iOS phone
- Communication: RS485 (default); CANBUS/HEAT (customized)
- Power supply mode: battery pack self-powered
- Supports single cell voltage dropout detection
- Protection functions: over charge, over discharge, over current, short circuit, over temperature, and “all-in” protection (cable drop/poor contact)
Specifications
| Model | JK-BD6A20S10P |
| Supported chemistry / strings | Li-ion: 7S-20S; LiFePO4: 8S-20S; LTO: 12S-20S |
| Wiring output | Common Port |
| Wiring method | Same port |
| Balance method | Active Balance (Full State On) |
| Balance current | 0.6A |
| Continuous charge current | 100A |
| Continuous discharge current | 100A |
| Maximum discharge current (MAX 2min) | 200A |
| Over charge protection current (ADJ) | 10-100A |
| Conductive resistance in main circuit | 1mΩ |
| Inner resistance of main chip | 0.8mΩ |
| Single cell voltage range | 1-5V |
| Single cell voltage detection range | 0-5V |
| Single cell voltage detection error | <10mV over full operating range; typical <5mV |
| Voltage acquisition accuracy | ±5mV |
| Total voltage detection range | 0-100V |
| Total voltage detection accuracy | <0.5%FSR (FSR = full scale) |
| Current sense shunt | -150A to 300A; error <0.5%FSR |
| SoC estimation accuracy | Error <8% (operating conditions) |
| Battery remaining capacity accuracy | Error range less than 8% |
| Total cycle AH cumulative value | Half of the charge/discharge value |
| Over charge protection voltage | 1.2-4.35V adjustable |
| Over charge release voltage | 1.2-4.35V adjustable |
| Over discharge protection voltage | 1.2-4.35V adjustable |
| Over discharge release voltage | 1.2-4.35V adjustable |
| Over current detect delay | 2-120S adjustable |
| Temperature detection | -40 to 125°C |
| Quantity of temperature detection | 3 pcs |
| Operating temperature | -40 to 85°C |
| Storing temperature | -40 to 95°C |
| Operating power consumption | <5mA (without communication) / 15mA (485/CAN) |
| Standby power consumption | <2mA |
| Short circuit protection | YES |
| Temp protection | YES |
| Coulomb counter | YES |
| Bluetooth | iOS / Android supported |
| Other interfaces (default) | RS485 |
| Other interfaces (customized) | CANBUS/HEAT |
| Size | 162*102*20mm |
Interfaces & Pinout (as labelled)
- CANBUS (need customization): GND / CAN_H / CAN_L
- RS485 (by default): GND / RX / TX / VCC
- LCD (by default): K- / K+ / GND / B / A / VCC
- Heat function port (need customization)
Bluetooth App Notes
- Download the specified Bluetooth application and activate the BMS.
- Open the Bluetooth application, find the relevant serial number, then check battery data.
- Example screens indicate monitoring items such as pack voltage/current, state of charge, cell voltages, cycle count, temperatures, and cell wire resistance.
Operating Modes (Smart energy working mode switching)
- Storage Mode: For transportation/storage/offline or wireless transmission off mode; does not consume battery pack current.
- Normal Working Mode: When a charger is inserted in storage/off mode, the BMS returns to normal working mode; protection, equalization, and communication functions return to normal.
- Shutdown: Automatic shutdown voltage; the BMS shuts down when a cell falls below the shutdown voltage to reduce long-term power waste.
- Standby Mode: When static (no charge/discharge current and no equilibrium current), enters standby after a set time (1-30 days can be set).
Applications
Suitable for multi-series Li-ion, LiFePO4, or LTO battery packs where active balancing and smart monitoring are required (for example: energy storage battery packs and DC backup systems). For selection and wiring support, contact service@tsolar.top or visit https://tsolar.top/.
Notes on Reference Graphics
- Some marketing graphics also display other models and their text, including: JK-BD6A17S6P (0.6A active balance; 60A continuous discharge/charge; 10S-17S LTO / 7S-17S Li-ion / 8S-17S LiFePO4) and JK-B2A20S20P-H-C (2A active balance; 200A continuous discharge/charge; heating function; RS485 default; built-in CANBUS chip). Product specifications above are for JK-BD6A20S10P.
Details
Active balancing helps keep cell voltages aligned, improving usable capacity and overall pack consistency.
Built-in Bluetooth supports quick monitoring and setup from Android or iOS, while RS485 is available for system integration.
A layered internal design combines the control board, power components, and multi-pin connectors in a compact enclosure.
Connector headers make it easier to wire communications, display, and optional add-ons depending on your configuration.
Live pack data and per-cell readouts help diagnose imbalance early and verify charging and discharge performance.
Settings and status pages provide a clearer view of wiring resistance, chemistry selection, and protection states.
Comprehensive protections help guard against common fault conditions, from cable issues to temperature events.
Power modes reduce self-consumption during long storage while automatically returning to normal operation when charging starts.
Use the comparison chart to choose the best match for your battery chemistry, series count, and current requirements.
