Overview
JKBMS B2A24S30P is an active balance smart BMS for multi-cell battery packs, supporting Li-ion (7S-24S), LiFePO4 (8S-24S), and LTO (12S-24S). It features 2A active balancing (Full State On), built-in Bluetooth for Android/iOS monitoring, and supports RS485 communication (default) with CANBUS/HEAT customization options.
Key Features
- Battery pack self-powered supply mode
- Active Balance (Full State On), balance current: 2000mA (2A)
- Built-in Bluetooth module; supports Android / iOS phones
- Supports RS485 communication (default); CANBUS/HEAT available as customized interfaces
- Single cell voltage dropout detection supported
- Protection functions listed: over charge, over discharge, over current, short circuit, all-in protection (cable drop/poor contact), over temperature
- Smart energy working mode switching described: Storage Mode, Normal Working Mode, Shutdown, Standby Mode (standby time 1-30 days can be set)
- Bluetooth app workflow described: download the specified Bluetooth application, activate the BMS, find the relevant serial number, then check data
For interface customization (e.g., CANBUS or heat function) and pre-sale technical checks, contact https://tsolar.top/ or service@tsolar.top.
Specifications
| Model | B2A24S30P |
| Number of battery strings (Li-ion) | 7S-24S |
| Number of battery strings (LiFePO4) | 8S-24S |
| Number of battery strings (LTO) | 12S-24S |
| Balance method | Active Balance (Full State On) |
| Balance current | 2A (2000mA) |
| Continuous current | 300A |
| Continuous charge current | 200A |
| Continuous discharge current | 200A |
| Maximum discharge current (MAX 2min) | 350A |
| Over charge protection current (ADJ) | 10-200A |
| Wiring method / wiring output | Same port / Common Port |
| Conductive resistance in main circuit | 0.47mΩ |
| 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 to 300A, error <0.5%FSR |
| SoC estimation accuracy | Error <8% (operating conditions) |
| Battery remaining capacity error | Less than 8% |
| Total Cycle Ah cumulative value | Half of the charge/discharge value |
| Short circuit protection | YES |
| Temp protection | YES |
| Temperature detection range | -40 to 125°C |
| Quantity of temperature detection | 3 pcs |
| Operating temperature | -40 to 85°C |
| Storing temperature | -40 to 95°C |
| Coulomb counter | YES |
| Bluetooth function | Support for Android & iOS phone |
| Other interfaces (default) | RS485 |
| Other interfaces (customized) | CANBUS/HEAT |
| 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 |
| Operating power consumption | <5mA (without communication) / 15mA (485/CAN) |
| Standby power consumption | <2mA |
| Size | 162*102*20mm |
Applications
- LiFePO4, Li-ion, and LTO battery packs that require active balancing and Bluetooth monitoring
- Energy storage battery builds where RS485 communication is required (with CANBUS/HEAT available as customization)
Details
Active-balancing smart BMS options cover multiple series counts, with self-powered operation for battery packs.
Built-in Bluetooth provides live pack and cell data on iOS/Android, while RS485 is included for wired communication.
A multi-layer internal design integrates power electronics, sensing, and communication connections in a compact housing.
Interface headers support RS485 by default, with optional CANBUS and heat-function customization depending on your build.
The mobile app displays total voltage, charge/discharge current, remaining capacity, and individual cell voltages at a glance.
Setup tools in the app help with device discovery, chemistry selection, and wiring resistance checks before normal operation.
Integrated protections cover charging, discharging, temperature, short-circuit events, and cable/connection faults.
Smart energy modes support storage, normal use, shutdown behavior, and adjustable standby timing to reduce idle drain.
Use the model comparison table to match series count, balancing current, and interface options to your battery pack.
