AG3 battery.Vanadium battery technology solution

　　Module management A significant advantage of the VRB-ESS energy storage system is its modularity. The power components and capacity components of the system can be designed independently. The rated power of the VRB-ESS system is determined by the number of stacks and the storage capacity is determined by the volume of the electrolyte. If a system requires higher power ratings or additional storage capacity, simply increasing the number of stacks or adding electrolyte can solve the problem.

　　Technical advantages

　　Rapid design and implementation of design solutions that meet environmental protection requirements;

　　Rapid upgrade of existing systems - additional energy storage capacity/output power can be achieved by increasing electrolyte capacity/stack structure.

　　Implement and maintain lower operating temperatures and good adaptability to changes in external ambient temperature;

　　The data management system can be accessed via the Internet or dial-up, and has complete auxiliary device interfaces;

　　The multi-quadrant and dynamic controller of the battery system has a dedicated control algorithm to control the charging and discharging of the battery to achieve output phase control, voltage compensation, reactive power compensation, short-term and instantaneous overload capabilities, thereby improving power quality and providing multiple defenses. The layer provides customized reporting and alarm functions for remote monitoring;

　　Achieving unmanned (remote) operation, the maintenance cost of vanadium batteries is extremely low (0.008 US dollars/kWh).

　　Performance indicator utilization exceeds 99%;

　　The VRB-ESS energy storage system can achieve 100,000 charge and discharge cycles or a service life of more than 10 years;

　　The AC-AC efficiency of the VRB-ESS energy storage system is 65-75%;

　　The theoretical charge-discharge rate ratio is 1.7:1 (optional 1:1), which enables discharge during charging peak hours during non-peak hours, which is especially suitable for wind power generation.

　　Vanadium electrolyte VRB-ESS energy storage system electrolyte mixing will not cause electrolyte pollution;

　　The electrolyte has a long life and no disposal or maintenance issues;

　　Very low self-discharge rate.

　　Design

　　The design drawing shows the 500kW×8-hour VRB-ESS energy storage system, which includes the layout of the stack structure, liquid storage tank, electronic equipment, control devices, and air conditioning system.

　　Technical Parameters

　　Model: MarkIIIkW class VRB-ESS™ product

　　Performance parameters Open circuit voltage 49.0V to 57.0V Maximum charging voltage 59.0V Minimum discharge voltage 42V Maximum charging current 140A Continuous maximum discharge current 125A Maximum discharge current (<120 seconds) 175A Continuous power at the beginning of discharge 6.0kW Continuous power at the end of discharge 5.0kW Capacity 20kWh~40kWh (equivalent lead-acid battery 500Ah~1000Ah) System efficiency (for full SOC charge and discharge cycle) 65% response time <1ms charge and discharge cycle ratio 1.6:1 (adjustable, the shortest can be adjusted to 1:1) cycle Lifespan (100% DOD) > 10,000 cycles Service life 100,000 hours Physical parameters Weight 4,400 kg Overall dimensions (depth x width x height) (Stack) Overall dimensions (depth x width x height) (20kW product) Overall dimensions (depth x width) x height) (40kW product) 1.0 m × 1.2 m × 1.1 m 1.0 m × 3.8 m × 1.2 m 1.1 m × 3.8 m × 1.65 m Ambient operating temperature 5°C~35°C-20°C~50°C ( Encapsulated in a power cabin) Transportation and storage temperature -25°C~70°C Working humidity 0% to 95%, non-condensing

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