Inspection items | Inspection method | Inspection method | Standard | Tools |
Performance check | Voltage | Measure the positive and negative terminals of the battery pack and read the test values | Factory voltage :49.5V ± 0.2V | 60V40A test cabinet |
Internal resistance | Measure the positive and negative terminals of the battery pack and read the test values | The internal resistance between the positive and negative terminals of the battery pack is≤40mΩ |
Charge and discharge performance | Under the conditions of ambient temperature 25±5℃ and relative humidity 30-80%, the lithium battery pack is charged at a standard constant current of 5A and a constant voltage of 54.75V (with the charging cut-off current set at 0.05A) and discharged at 5A (with the discharge cut-off voltage set at 40V). | Discharge capacity ≥9.5Ah |
| The charging cut-off voltage is ≥54V |
The discharge cut-off voltage is≤42.5V |
There is no interruption during the charging and discharging process |
Dimensional inspection | Size | Measure the length, width and height | Length * Height * height :174mm*85mm*225mm
(Excluding protrusions such as terminals), allowable tolerance :±3mm | Caliper |
Visual inspection | The surface is smooth and clean | Visually inspect the surface flatness and cleanliness | The surface is smooth without any protrusions or depressions, wrinkles, or dirt such as electrolyte | Visual inspection |
Barcode label | Check whether the content of the label is correct | 1. The content and format of the serial number are correct, and there are no duplicate serial numbers | Visual inspection |
