Before committing to large orders, buyers should conduct rigorous sample testing using this protocol:
- Equipment: Use a battery analyzer with 4-wire measurement, thermal camera/thermocouples, calibrated IR meter (AC 1 kHz and/or DC method), precision scale, calipers, and safety fixtures.
- Capacity Test: Fully charge cells per the datasheet, rest for 60–120 minutes, then discharge at 0.2C to the cut-off voltage (e.g., 2.5V). Repeat at your application’s actual discharge rate (e.g., 1C). Record energy (Wh) and capacity (Ah).
- IR Test: Measure DC pulse or AC 1 kHz IR at 25°C after standardized rest. Compare against datasheet limits; tight distributions indicate grade-A cells.
- Thermal Profile: Monitor temperature rise during continuous load tests. Flag cells that exceed your safety envelope.
- Cycle-Life Spot Check: Even 100 cycles at your DoD can reveal early degradation patterns.
Acceptance Criteria: Define thresholds for capacity (≥95% of rated), IR (≤ datasheet limit), temperature rise, and distribution tightness. Reject lots failing any criterion.
This testing minimizes risks of field failures and ensures cells meet your performance expectations.
Tato odpověď pochází z příspěvků《8krokový kontrolní seznam pro koupi originálních Li-ion článků 18650 3,7V 2600mAh》