Overview
The JKBMS (JIKONG) B1A8S20P-HC is an active balance smart BMS for LiFePO4, Li-ion, and LTO battery packs. It supports 3S to 8S battery strings (by chemistry: Li-ion 3S-8S, LiFePO4 4S-8S, LTO 6S-8S), provides 200A continuous charge/discharge capability, and includes built-in Bluetooth plus RS485/CANBUS communication options and a built-in battery heating function.
Key Features
- Active balancing: 1000 mA (1A), Active Balance (Full State On)
- Continuous current: 200A (continuous charge current 200A; continuous discharge current 200A)
- Peak discharge: 350A (MAX 2 min)
- Heating support: built-in heating chip
- Communication: RS485 (default); CANBUS/HEAT (customized)
- Bluetooth: built-in; supports Android / iOS phone
- Wiring: common port (same port)
- Protections and monitoring: short circuit protection, temperature protection, coulomb counter, single-cell voltage dropout detection
- Low consumption: operating power consumption <5mA (without communication) / 15mA (485/CAN); standby power consumption <2mA
Specifications
| Model | B1A8S20P-HC |
| Supported battery chemistry | LiFePO4 / Li-ion / LTO |
| Number of battery strings (overall) | 3S to 8S |
| Number of battery strings (Li-ion) | 3S-8S |
| Number of battery strings (LiFePO4) | 4S-8S |
| Number of battery strings (LTO) | 6S-8S |
| Balance method | Active Balance (Full State On) |
| Balance current | 1A (1000mA) |
| Continuous charge current | 200A |
| Continuous discharge current | 200A |
| Maximum discharge current (MAX 2 min) | 350A |
| Over charge protection current (ADJ) | 10-200A |
| Conductive resistance in main circuit | 0.47mΩ |
| Wiring output | Common Port |
| Power supply mode | The battery pack is self-powered |
| Single cell voltage detection range | 0-5V; error <10mV over full operating range; typical error value <5mV |
| Single cell voltage range | 1-5V |
| Voltage acquisition accuracy | ±5mV |
| Total voltage detection range | 0-100V; <0.5%FSR (FSR = full scale) |
| Current sense shunt | -150A~300A; error <0.5%FSR |
| SoC estimation accuracy | Error <8% (operating conditions) |
| Battery remaining capacity accuracy | Error range is 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 | -40~125°C |
| Quantity of temperature detection | 3Pcs |
| Operating temperature | -40~85°C |
| Storing temperature | -40~95°C |
| Operating power consumption | <5mA (without communication) / 15mA (485/CAN) |
| Standby power consumption | <2mA |
| Other interfaces (default) | RS485 |
| Other interfaces (customized) | CANBUS/HEAT |
| Short circuit protection | YES |
| Temp protection | YES |
| Coulomb counter | YES |
| Bluetooth function | Support for Android & iOS phone |
| Size | 153*136*18mm |
Applications
- LiFePO4, Li-ion, or LTO battery packs requiring 3S-8S monitoring and active balancing
- High-current battery systems requiring up to 200A continuous charge/discharge management
- Battery packs requiring Bluetooth monitoring and RS485/CANBUS communications
For pre-sales selection, wiring guidance, or after-sales support, contact service@tsolar.top or visit https://tsolar.top/.
Details
An active-balance smart BMS platform designed for multi‑series lithium battery packs, with clearly labeled string-range options.
Built for high-current packs, with active balancing plus communication support (RS485 by default, CANBUS optional) and heating capability.
A layered internal construction pairs the control board and power components inside a compact protective housing.
Connector layout helps speed up installation for RS485/CAN wiring, display connections, and heat-function integration.
Bluetooth monitoring provides live pack data, including total voltage, current, SoC, and per-cell voltage readings.
Switch between chemistry profiles and review cell information directly in the mobile app.
A full protection set helps safeguard the battery pack against common fault conditions during charging and discharge.
Power modes support long-term storage by reducing consumption, then returning to normal operation when charging starts.
Use the comparison chart to confirm the right model based on series count, balancing current, current rating, and interface options.
