Overview
The JKBMS B2A24S30P-HC is an active balance smart BMS (battery management system) for multi-cell battery packs, with built-in Bluetooth for monitoring on Android/iOS and support for RS485 communication. It supports Li-ion, LiFePO4, and LTO battery string configurations across 7S to 24S, and provides active balancing at 2A (Full State On).
Key Features
- Active balancing: 2000 mA (2A), Active Balance (Full State On)
- Battery pack self-powered
- Bluetooth built-in: supports Android / iOS phone
- Communication interfaces: RS485 (default); CANBUS/HEAT (customized)
- Protection functions (six security protection): over charge protection, short circuit protection, over discharge protection, over current protection, all-in protection (cable drop/poor contact), over temp protection
- App usage notes: download the specified Bluetooth application and activate the BMS; open the Bluetooth application and find the relevant serial number to check data
- Support: single cell voltage dropout detection; short circuit protection; coulomb counter; temperature protection
For wiring/interface guidance and after-sales support, contact https://tsolar.top/ or email service@tsolar.top.
Specifications
| Model | B2A24S30P-HC |
|---|---|
| Number of battery strings (general) | 7S to 24S |
| 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 (2000 mA) |
| Continuous current | 300A |
| 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 | 0.47 mΩ |
| Power supply mode | The battery pack is self-powered |
| Wiring method / output | Same port / Common Port |
| Single cell voltage detection range | 0-5V |
| Single cell voltage range | 1-5V |
| Single cell voltage detection error | <10 mV over full operating range (typical <5 mV) |
| Voltage acquisition accuracy | ±5 mV |
| 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 is less than 8% |
| Total Cycle AH cumulative value | Half of the charge/discharge value |
| Operating power consumption | <5 mA (without communication) / 15 mA (485/CAN) |
| Standby power consumption | <2 mA |
| Temperature detection range | -40 to 125°C |
| Operating temperature | -40 to 85°C |
| Storing temperature | -40 to 95°C |
| Quantity of temperature detection | 3 pcs |
| Temp protection | YES |
| Short circuit protection | YES / Support |
| Coulomb counter | YES |
| Bluetooth function | Support for Android & iOS phone |
| Other interfaces (default) | RS485 |
| Other interfaces (customized) | CANBUS/HEAT |
| Size | 162*102*20 mm |
| 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 |
Interfaces (labeled pin definitions)
- 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 (need customization)
Smart Energy Working Mode Switching (as described)
- 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 mode; protection, equalization, and communication functions return to normal working.
- 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.
- Shutdown: automatic shutdown voltage; the BMS automatically shuts down when a cell falls below the shutdown voltage.
Applications
- LiFePO4, Li-ion, and LTO battery packs requiring active balancing and smart monitoring
- Multi-series battery systems within the supported string ranges (7S-24S depending on chemistry)
Series reference text found in provided graphics (not the B2A24S30P-HC specification)
- JK-BD6A17S6P: Active Balance BMS; Active Balance Current: 0.6A; Adapt Battery Strings: 10S-17S (LTO) / 7S-17S (Li-ion) / 8S-17S (LiFePO4); Continuous Discharge/Charge Current: 60A
- JK B2A20S20P-H-C: Active Balance BMS; Active Balance Current: 2A; Adapt Battery Strings: 10S-20S (LTO) / 7S-20S (Li-ion) / 8S-20S (LiFePO4); Continuous Discharge/Charge Current: 200A; Support batteries heating function (built-in heating chip); Support RS485 function default / built-in CANBUS chip
Details
Built for multi‑cell packs, the JKBMS smart BMS combines active balancing with app monitoring and communication options.
Bluetooth monitoring and RS485 (default) help track pack status and cell data during charge and discharge.
Internal construction includes the control board, balancing circuitry, and multi‑pin harness connectors in a compact housing.
Wiring headers are labeled for RS485 by default, with optional CANBUS/heat function connections depending on configuration.
The mobile app displays total voltage, current, balance status, and individual cell voltages for quick health checks.
Switch battery type settings and review cell resistance/voltage data directly from the app once the BMS is paired.
Protection functions cover common fault conditions, including over‑charge/over‑discharge, over‑current, short‑circuit, and over‑temperature.
Smart power modes help reduce standby drain by transitioning between normal, storage, standby, and shutdown states.
Use the parameter table to confirm the exact model’s supported cell count, balancing current, and communication interface before ordering.
