AW-2R7-J107UY

The AW-2R7-J107UY is rated for a maximum ripple current of 8.5A at 25°C and 120Hz frequency. This rating ensures the cell operates within safe thermal limits during continuous charge/discharge cycling. At higher frequencies, the effective ripple current capability may be reduced due to increased ESR heating. For pulsed applications with duty cycles below 50%, higher peak currents up to 15A are permissible for short durations (less than 10 seconds) provided the average power dissipation does not exceed continuous ratings. The ripple current capability decreases at elevated temperatures - approximately 6.5A at 45°C and 4.5A at 65°C. Always verify the actual operating temperature in your application and ensure adequate thermal management for high-ripple applications.

For applications requiring continuous ripple current above 8A, consider parallel connection of multiple cells or upgrading to the 220F model with lower ESR.

The backup time provided by the AW-2R7-J107UY depends on the load current and allowable voltage drop. The cell stores approximately 0.1 Wh of energy (E = 0.5 * 100F * 2.7V² = 364.5 Joules). For a constant current load, backup time can be calculated using t = C * (V_initial - V_final) / I_load. For example, at 100mA load current from 2.7V to 1.35V (50% voltage drop), backup time is approximately 100F * 1.35V / 0.1A = 1350 seconds or 22.5 minutes. At 1A load, backup time reduces to approximately 2.25 minutes. For power-critical applications, it's recommended to maintain at least 20% voltage margin above the minimum operating voltage of your system. The actual usable energy is therefore E_usable = 0.5 * C * (V_max² - V_min²), which should be used for precise calculations.

Calculate your specific backup requirements using our online calculator or contact our FAE team for application-specific sizing analysis.

The AW-2R7-J107UY exhibits typical EDLC self-discharge characteristics. After charging to rated voltage and holding for 72 hours, the leakage current is specified at less than 0.3mA at 25°C. This corresponds to a voltage drop of approximately 10-15% over the first 24 hours, followed by slower discharge rates as voltage decreases. The self-discharge follows a logarithmic decay pattern characteristic of EDLC technology. At elevated temperatures, self-discharge increases significantly - approximately doubling for every 10°C increase. At 65°C, leakage current may reach 1-2mA. For applications requiring long-term energy retention (more than 72 hours), periodic topping charge or alternative energy storage technologies may be more appropriate. The high self-discharge rate is a fundamental characteristic of supercapacitors and must be considered in system design.

If your application requires energy retention beyond 72 hours, consider hybrid capacitors with lower self-discharge or implement a maintenance charging circuit.

Yes, the AW-2R7-J107UY can be connected in series to achieve higher operating voltages, but active voltage balancing is mandatory for reliable long-term operation. When cells are connected in series, voltage imbalance naturally occurs due to variations in capacitance and leakage current between individual cells. Without balancing, some cells may exceed their 2.7V rating while others remain undercharged, leading to accelerated degradation and potential failure. Aowei recommends using active balancing circuits that monitor and equalize cell voltages during both charge and discharge cycles. For a 16V module (6 cells in series), the AW-BAL-6S-2.7V balancing board is recommended. Passive balancing using resistors is not recommended as it increases self-discharge and provides limited balancing capability. All cells in a series string should be from the same production batch to minimize parameter variations.

For series applications, purchase pre-assembled modules with integrated balancing or contact our FAE team for balancing circuit design guidance.

The AW-2R7-J107UY contains organic electrolyte and must be handled with appropriate safety precautions. Do not disassemble, puncture, or expose to temperatures exceeding 85°C as this may cause venting, fire, or explosion. In normal operation, the hermetic seal prevents electrolyte leakage. However, mechanical abuse or overvoltage conditions can cause cell venting - a safety feature that releases pressure to prevent rupture. The electrolyte is flammable; avoid exposure to ignition sources. First aid: if electrolyte contacts skin, wash immediately with water; if in eyes, flush with water for 15 minutes and seek medical attention. For disposal, supercapacitors are not classified as hazardous waste under most regulations, but local regulations should be consulted. Cells should be discharged to 0V before disposal. The product is UL recognized and meets applicable safety standards when used within specified parameters.

Review the complete safety datasheet and application notes before designing the AW-2R7-J107UY into your system.

The AW-2R7-J107UY offers distinct advantages and trade-offs compared to battery solutions for backup power applications. Advantages include: virtually unlimited cycle life (500,000+ vs 500-2000 for batteries), rapid charge capability (can charge to 90% in seconds vs hours for batteries), wide temperature operation (-40°C to +65°C vs limited range for batteries), maintenance-free operation, and no memory effect. Disadvantages include: lower energy density (0.1 Wh for this cell vs 1-3 Wh for similar-sized lithium batteries), higher self-discharge (10-15% per day vs 1-2% for lithium), and higher initial cost per watt-hour. For applications requiring frequent cycling, short backup times (seconds to minutes), wide temperature range, or maintenance-free operation, supercapacitors are superior. For long backup times (hours) and infrequent cycling, batteries remain more cost-effective. Hybrid solutions combining both technologies can leverage the advantages of each.

Evaluate your application's cycle frequency, backup duration, and temperature requirements to determine if supercapacitors or batteries are more suitable.