Overview
JKBMS B2A24S20P is an Active Balance BMS for LiFePO4, Li-ion, and LTO battery packs, featuring 2A active balancing, built-in Bluetooth monitoring, and RS485 communication (with CANBUS/HEAT available as customized interfaces). It supports 7S–24S (Li-ion), 8S–24S (LiFePO4), and 12S–24S (LTO) configurations with 200A continuous charge/discharge capability.
Key Features
- Active Balance (Full State On), balance current: 2A (2000mA)
- Continuous current: 200A (charge/discharge)
- Maximum discharge current (MAX 2 min): 350A
- Built-in Bluetooth; supports Android / iOS phone monitoring
- Default interface: RS485; customized interfaces: CANBUS/HEAT
- Common port (same port) wiring output
- Supports short circuit protection and temperature protection
- Supports single cell voltage dropout detection
For pre-sales compatibility checks and wiring/support questions, contact https://tsolar.top/ or email service@tsolar.top.
Specifications
| Model | B2A24S20P |
| Battery chemistry support / strings | Li-ion: 7S-24S; LiFePO4: 8S-24S; LTO: 12S-24S |
| Balance method | Active Balance (Full State On) |
| Balance current | 2A (2000mA) |
| 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 |
| Power supply mode | The battery pack is self-powered |
| Wiring output | Common Port |
| Single cell voltage range | 1-5V |
| Single cell voltage detection range | 0-5V |
| Single cell voltage detection error | <10mV over full operating range; typical error value <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~300A |
| Current sense error | <0.5%FSR |
| SoC estimation accuracy | Error <8% (operating conditions) |
| Battery remaining capacity error | 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 range | -40~125°C |
| Quantity of temperature detection | 3 pcs |
| Operating temperature | -40~85°C |
| Storing temperature | -40~95°C |
| Operating power consumption | <5mA (without communication) / 15mA (485/CAN) |
| Standby power consumption | <2mA |
| Interfaces (default) | RS485 |
| Interfaces (customized) | CANBUS/HEAT |
| Bluetooth function | Support for Android & iOS phone |
| Built-in Bluetooth module | Yes |
| Coulomb counter | Yes |
| Short circuit protection | Yes |
| Temp protection | Yes |
| Dimensions | 162*102*20mm |
Communication & Interface Notes
- RS485: by default
- CANBUS: needs customization
- LCD: by default
- Heat function: needs customization
- CAN/RS485 connector (CANBUS): GND, CAN_H, CAN_L
- RS485 connector: GND, RX, TX, VCC
- LCD connector: K-, K+, GND, B, A, VCC
Protection Functions
- Over charge protection
- Short circuit protection
- Over discharge protection
- Over current protection
- All-in protection (prevents cable drop or poor contact)
- Over temperature protection
Smart Energy Working Mode Switching
- Storage Mode: In transportation/storage/offline or wireless transmission off mode, the BMS is in storage mode and does not consume battery pack current.
- Normal Working Mode: When the charger is inserted in storage mode and off mode, the BMS immediately returns to normal working; protection, equalization, and communication functions return to normal working.
- Shutdown: The BMS has an automatic shutdown voltage and automatically shuts down when a cell falls below the shutdown voltage.
- Standby Mode: When the battery pack is static (no charge/discharge current and no equilibrium current), the BMS automatically enters standby after the set time (1-30 days can be set) is exceeded.
Applications
- LiFePO4 / Li-ion / LTO battery packs requiring active balancing and 200A continuous current management
- Energy storage battery packs where Bluetooth monitoring and RS485 communication are needed
Details
