HEFEI ECOLITE ENERGY CO., LTD.
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Highly Functional Level 3 High voltage Battery Management System for BCU Energy Storage
Diagram of Energy storage level 3 Architecture System:
Level 3 battery system architecture:First level control: BAU centrally manages the various clusters of batteries in the battery array, and communicates with external PCS, UPS, EMS, airconditioning, liquid cooling, fire protection, etc;
Secondary control: BCU1~BCUmmanaging each cluster of batteries collecting cluster battery information, high-voltage control, and uploading cluster information to BAU;
Slave control:BMU1~BMUn, responsi-ble for collecting battery voltage, temperature and otherinformation of the battery module.
| Products | Function configuration | |||||
| BCU | Parameter | MinimumValue | TypicalValue | Maximum UnitValue | Description | |
 | Power input | 9 | 24 | 32 | v | |
| Working current | 180 | 125 | 130 | mA | ||
| Rated power | S3 | W | ||||
| CAN BuS | 3 | Channel | 2-wayisolation,1-way non isolation | |||
| 485 Bus | 2 | Channel | 2-way isolation | |||
| LAN interface (TCP/P) | 1 | Channel | ||||
| High edge output | 8+2 | Channel | 2-way support for PWM output | |||
| Switching input detection | 9 | Channel | solaed acise dee prosive detection, 1 -way | |||
| Dry node output | 2 | Channel | Rated 2A, passive output | |||
| Temperature detection | 4 | Channel | +2℃℃,-40~125°℃,supports NTC-10K,100K | |||
| Total voltage detection channel | 3 | Channel | 1 channel supports main and negative relayadhesion detection | |||
| Total voltage detection range | 12 | 1500 | V | Total pressure detection error ≤ 0.3% | ||
| Manage the rated voltage ofthe battery pack | 1500 | V | Rasrocltage ssoy, withstand voltage AC3100+,DC4380+ | |||
| Supports the number of BMU | 40 | PCS | ||||
| Detect the total | 6 | 500 | Strand | Used in | ||
| Number of battery strings | Conjunction with BMU | |||||
| Current detection | 2 | Channel | Supports 1 splitter,1 Hall(supports 5v,12v), and can collect data simultaneously | |||
| Current detection range | -1500 | 1500 | A | Range optional | ||
| Current detection error | 0 | 1 | 1%FSR | A | Typical error 0.5% FSR, maximum error 1% FSR | |
| Insulation testing | 15% | KΩ | 0-200KΩ,error<15KΩ;>200KΩ,eror≤+15% | |||
| BCU automatic addressing | support | lsolation type, level signal addressed | ||||
| SOC estimation error | 0 | 3% | 5% | ≤5% | ||
| SOH estimation accuracy | 0 | 3% | 10% | |||
| SOE estimation accuracy | 0 | 3% | 5% | |||
| Products | Function configuration | |||||
| BAU | Parameter | MinimumValue | TypicalValue | Maximum UnitValue | Description | |
| Power input | 9 | 24 | 32 | v | |
| Working current | 180 | 200 | 220 | mA | ||
| Rated power | ≤5 | W | ||||
| CAN Bus | 4 | Channel | lsolation communication | |||
| 485 Bus | 4 | Channel | lsolation communication | |||
| USB interface | 1 | Channel | Used for external data storage, default 32/64G | |||
| LAN interface (TCP/IP) | 2 | Channel | ||||
| Relay drive output (RL) | 4 | Channel | ||||
| Dry node output (DO) | 4 | Channel | Rated 2A, passive dry node | |||
| Digital Input (DlH) | 2 | Channel | High level detection | |||
| Digital Input (DlL) | 2 | Channel | Low level detection | |||
| Digital signal power input | 1 | Channel | lsolation signal detection power supply | |||
| Supports the number of BCU | 30 | PCS | ||||
| Products | Function configuration | ||||
| BMU | Parameter | BMU16 | BMU32 | BMU48 | BMU64 |
| Working voltage range | 9~32V | |||
| Working voltage range | S50mA(12V)/s25mA(24V) | ||||
| Rated power | ≤0.6W | ||||
| CAN communication | 1 Channel | ||||
| Number of voltage acquisitionstrings | 16 | 32 | 48 | 64 | |
| Temperature detection point | 4 | 8 | 12 | 16 | |
| Single cell detection range | 0-5000mV; Exceeding the range of -0.5~6V can cause AFE damage | ||||
| Voltage acquisition accuracy | ±5mV | ||||
| Temperature detection accuracy ±2°C | ±2°C | ||||
| Balance function | Support, passive balancing | ||||
| Balanced number of opening routes | Every 8 channels can activate 1 channel equalization | ||||
| Digital signal power input | Max120mA,effective value 30-50mA | ||||
| Automatic address allocation | Support | ||||
| Io output | 2-way dry contact, rated 2A, passive output | ||||
| Analog input detection | 2-way (high edge detection) | ||||
| Bootloader | Support CAN bus burning and writing | ||||
| CAN communication | 1 Channel | ||||
| Anti reverse connection of power supply | Support | ||||
| Power surge prevention | Support | ||||
| Voltage resistance | Voltage withstand AC3100+,DC4380+ | ||||
| Working temperature | -40°C~85°C | ||||
| Storage temperature | -40°C~125°C | ||||
| Protection level | IP43, Not waterproof | ||||
| Humidity | <95%,No condensation | ||||
| Shock | ≤5500m | ||||
| Automatic address allocation | At 10-25Hz,the amplitude is 1.2mm: At 26-500Hz,maximum 30m/S | ||||
| Drop | 1.5m, 5 times in both horizontal and vertical directions, no damage to PCBA, no change in performance | ||||