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PRS-7550 Battery management system

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.

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Scope of Application
Lithium iron phosphate battery energy storage system，Ternary lithium battery energy storage system，Lead-acid/Lead-carbon battery energy storage system，Household energy storage system，etc.
Advantages
01
It can manage multiple battery clusters, and the clustering scheme is flexible, which can adapt to various application scenarios.
02
It can realize grid-connection control of single battery cluster, which is convenient for maintenance and repair.
03
With real-time insulation monitoring function, it can provide guarantee for system insulation safety.
04
It can provide real-time display of battery state, system charging and discharging information, alarm records, SOC and other information and operating state.
05
The BMS touch screen requires a security password for operation, and non-professionals cannot operate the system via touch screen.
06
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.
07
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.
08
The BMS system adopts a three-level structure, and the hierarchical functions are clear and easy to maintain.
09
The BMS system has multiple communication interfaces, including RS485, CAN, Ethernet and RS232, and the communication method is convenient and flexible.
010
It has the function of information recording, and the information will not be lost when power is off.
Technical Features
BMS electrical parameters
Technical parameters of BMS collection and measurement
Technical parameters of BMS calculation and storage

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


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%

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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