Overview
The JKBMS BD6A20S6P is an active balance BMS (battery management system) for LiFePO4, Li-ion, and LTO battery packs. It supports 7S to 20S configurations (Li-ion: 7S-20S; LiFePO4: 8S-20S; LTO: 12S-20S) with 0.6A active balancing (Full State On) and 60A continuous charge/discharge current. Bluetooth is built-in for Android/iOS monitoring, and RS485 communication is provided by default (CANBUS available as a customized interface). The battery pack is self-powered.
Key Features
- Battery string support: 7S to 20S (chemistry-dependent)
- Active Balance (Full State On), balance current: 600mA (0.6A)
- Continuous current: 60A; maximum discharge current (max 2 min): 100A
- Built-in Bluetooth; supports Android / iOS phone
- RS485 communication (default); CANBUS communication (customized)
- Common port / same port wiring
- Single cell voltage dropout detection support
- Six protection functions: over charge, over discharge, over current, short circuit, all-in (cable drop/poor contact), over temperature
- Operating mode switching: Storage Mode, Normal Working Mode, Shutdown, Standby Mode (standby time can be set to 1-30 days)
- Bluetooth app notes: download the specified Bluetooth application and activate the BMS; open the app, find the relevant serial number, then check data
Specifications
| Model | BD6A20S6P |
| Balance method | Active Balance (Full State On) |
| Balance current | 0.6A (600mA) |
| Number of battery strings (Li-ion) | 7S-20S |
| Number of battery strings (LiFePO4) | 8S-20S |
| Number of battery strings (LTO) | 12S-20S |
| Wiring output / wiring method | Common Port / Same Port |
| Continuous charge current | 60A |
| Continuous discharge current | 60A |
| Maximum discharge current (max 2 min) | 100A |
| Over charge protection current (adjustable) | 10-60A |
| Conductive resistance in main circuit | 1.53 mΩ |
| Single cell voltage detection range | 0-5V; error < 10mV over full operating range; typical error < 5mV |
| Single cell voltage range (supported) | 1-5V |
| Voltage acquisition accuracy | ±5mV |
| Total voltage detection range | 0-100V; < 0.5% FSR (FSR = full scale) |
| Current sense shunt | -150A to 300A; error < 0.5% FSR |
| 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 |
| Temperature protection | YES |
| Short circuit protection | YES |
| Coulomb counter | YES |
| SoC estimation accuracy | Error < 8% (operating conditions) |
| Battery remaining capacity | Error range is less than 8% |
| Total Cycle AH cumulative value | Half of the charge/discharge value |
| Operating power consumption | < 5mA (without communication) / 15mA (485/CAN) |
| Standby power consumption | < 2mA |
| Operating temperature | -40 to 85°C |
| Storage temperature | -40 to 95°C |
| Bluetooth | Support for Android & iOS phone |
| Other interfaces (default) | RS485 |
| Other interfaces (customized) | CANBUS |
| Size | 133*81*18mm |
Interface Notes (as labeled)
- CANBUS: customization required; pins labeled GND / CAN_H / CAN_L
- RS485: by default; pins labeled GND / RX / TX / VCC
- LCD: by default; pins labeled K- / K+ / GND / B / A / VCC
- Heat function: customization required
For product selection and technical support, contact service@tsolar.top or visit https://tsolar.top/.
Applications
- LiFePO4, Li-ion, and LTO battery packs requiring active balancing (up to 20S, chemistry-dependent)
- Energy storage battery packs where Bluetooth monitoring and RS485/CANBUS communication are needed
Details
Built for 7S–20S battery packs, the JKBMS active balancing BMS supports 0.6A balancing and 60A continuous current with common-port wiring.
Bluetooth monitoring and RS485 communication come standard, with CANBUS available as a customized interface for system integration.
A layered internal design combines the power stage, balancing circuitry, and connectors in a compact, protected enclosure.
Clearly labeled connectors simplify installation, including CAN/RS485, the default LCD header, and an optional heat-function connection.
Real-time Bluetooth data on iOS/Android includes pack voltage/current plus a full list of individual cell voltages for quick health checks.
Six core protections cover overcharge, overdischarge, overcurrent, short circuit, cable drop/poor contact (all-in), and over-temperature events.
Power modes include Storage, Normal, Shutdown, and Standby to reduce drain during long periods of non-use.
