Flow Battery Stack
PRODUCT OVERVIEW
Stacks are the core component of the flow battery energy storage system, where the electrolyte undergoes electrochemical reactions to achieve charging and discharging, determining the power level of the system. Flow batteries have the characteristic of decoupling power and capacity because they store the electrolyte outside the reaction stack: the stack determines the power of the battery, while the amount of electrolyte determines the capacity. It is suitable for research institutions and manufacturers to test flow battery materials or systems.
PRODUCT FEATURES
High performance: Featuring a structural design adopted from large commercial battery stacks, with flow channels that have been thoroughly optimized and validated through engineering, the energy efficiency exceeds 80% under a power density of 200mW/cm2
Consistency: Manufactured on a mechanized production line, the standardized production process has obtained ISO9001 international quality management system certification
Diversity in specifications: The standard models are 1kW and 5kW, with the option to increase or decrease the number of cells within the 5kW range
SPECIFICATION
Products include: end plate, current collector, liquid flow frame, bipolar plate, proton exchange membrane, graphite felt electrode, etc.
| Specification Parameter | |||||
|---|---|---|---|---|---|
| Rated Power | 100W | 500W | 1kW | 2.5kW | 5kW |
| Voltage Range | 5-7.8V | 5-7.8V | 10-15.5V | 25-38.8V | 50-77.5V |
| Max. Current | 20A | 100A | |||
| No. of Cells | 5 | 5 | 10 | 25 | 50 |
| Energy Efficiency | DC≥80% | ||||
| Stack Dimensions | 12×22×14cm | 21×50×35cm | 25×50×35cm | 35×50×35cm | 66×50×35cm |
| Stack Weight | 5.5kg | 37kg | 40kg | 50kg | 94kg |
| Electrolyte inlet dimensions | Soft tubing | DN20 | |||
| Protective Class | IP20 | ||||
| Best Operational Temperature | 20-40℃ | ||||
| Environmental Humidity | 5-95% | ||||
TEST PERFORMANCE
Performance demonstration of a 5kW stack under constant power charge and discharge
Product includes: end plates, current collectors, flow frames, bipolar plates, membranes, electrodes.
Test conditions: Ambient temperature: 25-30℃. Initial electrolyte: 1.7M V3.5+, 4.2M SO4 in both positive and negative tanks.
Pre-test procedure: Circulate electrolyte for 24 hours to fully wet stack materials, then activate stack with 3 charge-discharge cycles at 50% rated power (2.5kW / 16kW).
Formal test: Perform charge-discharge cycles at constant 5kW / 32kW power. Charge/discharge cutoff voltages refer to technical specification table.
| Specification Parameter | |||
|---|---|---|---|
| Rated Power | 5KW | 32KW | |
| Voltage Range | 50-80V | 88-140V | |
| Max. Current | 112A | 360A | |
| No. of Cells | 50 | 88 | |
| Flow rate of catholyte or anolyte | 25-30L/min ( Each flow inlet 12.5-15L/min） | 100-120L/min ( Each flow inlet 50-60L/min） | |
| Pressure drop through stack | 60-80kPa | 120-150kPa | |
| Energy Efficiency | DC≥80% | ||
| Stack Dimensions | 660mm×504mm×351mm（L*W*H） | 1210mm×839mm×545mm（L*W*H） | |
| Stack Weight | 94kg | 350kg | |
| Electrolyte Inlet/Outlet Size | DN20 | DN25 | |
| Protective Class | IP20 | ||
| Best Operational Temperature | 10-30℃ | ||
| Environmental Humidity | 5-95% | ||
OBTAINED CERTIFICATES
