PRS-7550 Battery management system

Product Description

The battery management system (BMS) is the most important control link in the energy storage system. On the one hand, the BMS system protects, monitors, measures, and maintains the battery cells; on the other hand, the BMS system performs data transmission, command reception, log storage, and power interactive control. These functions are the bridge and interface of interaction between micro-grid, monitoring & PCS and the battery. Therefore, the BMS system is the most critical link between the entire energy storage control system and the battery.

The PRS-7550 battery management system of CYG SUNRI is mainly used in large-scale energy storage containers and indoor energy storage projects, and it generally forms a complete energy storage system with PCS and EMS. Due to its various functions such as protection, measurement, monitoring, and communication, it is the most important cornerstone in the energy storage control system and bears important responsibilities such as battery maintenance and safe use.

Scope Of Application

Lithium iron phosphate battery energy storage systemTernary lithium battery energy storage systemLead-acid/Lead-carbon battery energy storage systemHousehold energy storage system
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Technical Features/Advantages

It can manage multiple battery clusters, and the clustering scheme is flexible, which can adapt to various application scenarios.

It can realize grid-connection control of single battery cluster, which is convenient for maintenance and repair.

With real-time insulation monitoring function, it can provide guarantee for system insulation safety.

It can provide real-time display of battery state, system charging and discharging information, alarm records, SOC and other information and operating state.

The BMS touch screen requires a security password for operation, and non-professionals cannot operate the system via touch screen.

It has a complete electrical safety detection and protection scheme; it can provide various functions, such as over-current protection, over-voltage protection, under-voltage protection, single battery protection, and SOC over-discharge protection.

Equipped with a large-size touch LCD screen, it has a good human-computer interaction interface, and there is screen prompt of operation and function during the whole process.

The BMS system adopts a three-level structure, and the hierarchical functions are clear and easy to maintain.

The BMS system has multiple communication interfaces, including RS485, CAN, Ethernet and RS232, and the communication method is convenient and flexible.

It has the function of information recording, and the information will not be lost when power is off.

Specifications/Submodels

able 1 BMS electrical parameters

Item Parameter Note
Active equalization 1-5A
Equalization efficiency No less than 90% Equalization efficiency
Passive equalization Maximal 150mA
Power consumption BMU static power consumption <1.2W 12 strings single battery collection
BCMU power consumption <5W
BSMU power consumption <30W

Table 2 Technical parameters of BMS collection and measurement
Item Parameter
Voltage acquisition Total voltage detection range <1000V
Total voltage detection precision ±0.2%
Total voltage acquisition cycle 1ms
Total voltage upload mode Change of state (COS) upload + cycle upload
Total voltage upload cycle 500ms
Single battery voltage detection range 0-5V
Single battery voltage detection precision ±5mV
Single battery voltage acquisition cycle Adjusted according to project, no shorter than 1ms
Single battery upload mode Cycle upload
Single battery upload cycle Adjusted according to project, a standard cycle is 100ms
Current acquisition Current detection range ±1000A
Current detection precision ≤±0.2%
Current acquisition cycle 1ms
Current upload mode Change of state (COS) upload + cycle upload
Current upload cycle 500ms
Temperature acquisition Temperature detection range -20~85℃
Temperature measurement precision ±1℃
Temperature resolution ratio ≤1℃
Temperature acquisition cycle Adjusted according to project, no shorter than 1ms
Temperature upload mode Cycle upload
Temperature upload cycle Cycle upload
Insulation resistance detection Detection precision <5%

Table 3 Technical parameters of BMS calculation and storage
Item Parameter
SOC calculation precision ≤8%
SOC calculation upload cycle ≤500ms
Event record ≥10000
Information storage duration Online storage for 45 days

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