Open circuit voltage                                                                        V              96-110

Maximum charge voltage                                                               V                 115

Minimum voltage on discharge                                                      V                  81

Maximum charge current                                                               A                  350

Maximum discharge current (continuous)                                     A                  350

（<300s）Maximum discharge current (< 300s)                           A                  437

Continuous power at beginning of discharge                               kW                37

Continuous power at end of discharge                                         kW                33

System Efficiency                                                                                               >80%

Response time                                                                               ms                 < 5

Duty Cycle                                                                                                            100%

Cycle Life                                                                                        cycle             >10000

Service Temperature Range                                                            ℃                0 ~ 40

The battery management system adopts a two-stage architecture. The lower BMU is responsible for monitoring stack voltage, stack current, relay control, circulating pump control, insulation monitoring, and communicating with the upper BAMS. The upper layer BAMS is responsible for various sensor monitoring of the battery system, battery system balance management, environmental system control, and communication with PCS and intelligent microgrid integrated energy efficiency management platform, while configuring protocol conversion devices to match different protocol requirements.

The battery management system has the following functions: (1) Detect the voltage, current, pressure, temperature, insulation resistance of the stack and the stack group, and carry out real-time monitoring of these parameters, and real-time monitoring of environmental parameters such as temperature and humidity of the container and electrolyte level. (2) Estimate the state of charge (SOC) of the battery and report SOC in real time. (3) Charge and discharge control of the battery according to the state control plan of the battery, such as battery voltage overvoltage or overcurrent, the system immediately stops the battery.

(4) The battery fault diagnosis, and according to the specific fault content of the corresponding fault treatment, with but not limited to the following protection functions: overcharge protection, overdischarge protection, short circuit protection, overload protection, overtemperature protection. Related fault information Provides functions such as uploading fault information and real-time alarm. (5) Real-time monitoring of the reactor and the reactor group of electrolyte temperature, through the heat exchanger to take cooling/heating measures to adjust the temperature of the electrolyte, to prevent all vanadium flow REDOX battery working at high or low temperature. (6) The function of information interaction with the intelligent microgrid integrated energy efficiency management platform.

The vanadium electrolyte developed by the company has better electrochemical performance, the metal impurity content is obviously better than the national standard grade one, and most of the parameters are better than international standards. 140mA/cm2 current density constant current charge and discharge curve of a single battery. Compared with the original electrolyte, the charging voltage is reduced by 35mV, and the discharge voltage is increased by 90mV, which improves the voltage efficiency of the battery. Compared with the original electrolyte, the new formulation electrolyte will extend the charge and discharge time, for example, the discharge time is extended from the original 38 minutes to 58 minutes, and the performance is improved by 53%.