AW-2R7-J227UY

The AW-2R7-J227UY is rated for maximum continuous current of 12A at 25°C, limited by thermal considerations. At this current level, the power dissipation in the ESR (P = I² × R = 144 × 0.012 = 1.73W) must be managed through adequate heat sinking or thermal management. For short-duration pulses (less than 10 seconds), peak currents up to 50A are permissible, making this cell ideal for regenerative braking and pulse power applications. The current capability decreases at elevated temperatures - approximately 10A at 45°C and 7A at 65°C. For continuous high-current applications, thermal modeling is recommended to ensure cell temperature remains within specified limits. The low 12mΩ ESR minimizes self-heating compared to higher-resistance alternatives, enabling higher operational currents for a given temperature rise.

For continuous currents above 10A, implement thermal management or parallel multiple cells to distribute current and heat load.

The AW-2R7-J227UY excels in regenerative braking applications due to its combination of high capacitance and low ESR. During braking events, the cell can accept high charge currents (up to 50A peak) with minimal voltage rise, maximizing energy recovery efficiency. The low ESR (12mΩ) means less energy is lost as heat during both charge and discharge cycles. For a typical EV regenerative braking scenario with 20kW braking power for 5 seconds, the cell voltage rises from 1.5V to approximately 2.4V, capturing about 85% of available braking energy. The 220F capacitance provides adequate energy storage for multiple braking cycles without requiring immediate discharge. The cell's 500,000+ cycle life easily accommodates the frequent charge/discharge cycles typical of urban driving profiles. For system design, six cells in series create a 16V module suitable for 12V automotive systems.

For EV regenerative braking systems, use 6 cells in series (16V module) with active balancing. Contact our FAE team for system sizing calculations.

The AW-2R7-J227UY has a thermal resistance (Rth) from case to ambient of approximately 15°C/W in free air conditions. This means that for every watt of power dissipated in the ESR, the cell case temperature rises 15°C above ambient. For example, at 10A continuous current, power dissipation is 1.2W (10² × 0.012), resulting in an 18°C temperature rise. The thermal resistance can be significantly reduced through mounting techniques - securing the cell to a metal chassis or PCB ground plane can reduce Rth to 8-10°C/W. Forced air cooling further improves thermal performance. The cell's maximum operating temperature of 65°C limits continuous operation in high ambient temperatures without additional cooling. For thermal modeling, use the following parameters: Rth_case-ambient = 15°C/W, thermal time constant ≈ 300 seconds, maximum internal temperature = 70°C.

For high-current applications, ensure adequate thermal management through PCB design or chassis mounting. Contact our FAE team for thermal modeling support.

Yes, parallel connection of AW-2R7-J227UY cells is a common practice to increase total capacitance and current capability. When connecting cells in parallel, total capacitance is the sum of individual capacitances (C_total = n × C_cell), while ESR decreases proportionally (ESR_total = ESR_cell / n). For example, two 220F cells in parallel provide 440F capacitance with 6mΩ effective ESR. Parallel configurations improve current sharing and reduce self-heating. However, important considerations apply: cells should be from the same production batch to minimize voltage imbalance, initial charging should be performed with cells at similar voltages to avoid high equalization currents, and wiring resistance between cells must be minimized to ensure current sharing. Parallel configurations do not require balancing circuits since cells naturally equalize voltage. This topology is ideal for high-current applications where single-cell ESR would cause excessive heating.

For applications requiring capacitance above 220F or current above 12A continuous, parallel multiple AW-2R7-J227UY cells.

The expected lifetime of the AW-2R7-J227UY depends strongly on operating conditions, particularly voltage and temperature. Under nominal conditions (2.7V, 25°C), the cell is rated for 500,000 cycles with less than 20% capacitance degradation. Calendar life is typically 10+ years at 25°C and rated voltage. Using the Arrhenius equation, lifetime approximately doubles for every 10°C decrease in temperature. For example, at 45°C, calendar life reduces to approximately 2.5 years, while at 65°C it may be less than 1 year. Voltage derating significantly extends lifetime - operating at 2.43V (90% of rated) can extend calendar life by 2-3x. For applications requiring maximum lifetime, Aowei recommends operating at 80% of rated voltage and below 45°C. The cell's built-in voltage derating characteristics and robust construction make it suitable for 10+ year applications when properly designed.

For applications requiring 10+ year lifetime, implement voltage derating to 2.4V and ensure operating temperature remains below 45°C.

The AW-2R7-J227UY undergoes comprehensive testing to ensure quality and reliability. 100% production testing includes capacitance measurement (within ±20% tolerance), ESR testing (must be ≤12mΩ), leakage current measurement (≤0.5mA at 72 hours), and visual inspection. Additional qualification testing per AEC-Q200 includes: high temperature storage (1000 hours at 85°C), temperature cycling (-40°C to +85°C, 1000 cycles), mechanical shock (50G, 11ms), vibration (5-2000Hz, 20G), and humidity resistance (85°C/85%RH, 1000 hours). Life testing demonstrates 500,000+ cycles with less than 20% degradation. Safety testing includes overvoltage, reverse voltage, short circuit, and nail penetration tests. All testing is performed in ISO 17025 accredited laboratories. Certificate of conformance and detailed test reports are available upon request for high-reliability applications.

Request PPAP documentation and qualification test reports for automotive or high-reliability applications requiring detailed quality documentation.