B2 Cell TestsB2.1 ElectricalB2.1.1

B2 Cell TestsB2.1 ElectricalB2.1.1 Cell short circuitB2.1.1.1 Two as received fully charged cells and two fully charged cells previously subjected to charge/discharge cycling outlined in B2.1.1.2 shall comply with the short circuit test of B2.1.1.3.B2.1.1.2 The cycled cells shall be cycled continuously in accordance with the manufacturer’s specifications. The specifications shall be such that the full capacity of the cell is utilized and the number of cycles accumulated shall be at least equal to 25% of the advertised cycle life of the cell or cycled continuously for 90 days, whichever is shorter. Cycling is to be done either individually or in groups. The cell is then recharged prior to testing.B2.1.1.3 Each test sample is to be short-circuited by connecting the positive and negative terminals to a resistance load of less than or equal to 20 mΩ. The testing is conducted at room ambient 25 ±5°C with the cell heated to its normal operating temperature. Testing is continued until the cell is fully discharged and the temperature returns to operating ambient. The test is repeated with the short circuit condition applied first and then the cell heated to its normal operating temperature.