| Column | Description |
|---|---|
| test_name | test identifier, see below for test name codification |
| record_id | id of the step in the test |
| time | time elapsed since test start |
| step_time | time used to perform the step |
| line | procedure code, see below |
| voltage | V[V] |
| current | I[A] |
| charging_capacity | capacity measured during charge. During charging cicles, it represent the present capacity of the battery. It is zeroed at each charge/discharge cycle |
| discharging_capacity | capacity measured during discharge. It is how much the battery has been discharged i.e. during discharging cicles: present_capacity = charging_capacity - discharge capacity. It is zeroed at each charge/discharge cycle |
| wh_charging | Wh measured during charge. It is zeroed at each discharge cycle |
| wh_discharging | Wh measured during discharge. It is zeroed at each discharge cycle |
| temperature | cell temperature measured using NTC sensor placed in the middle of the cell's body and attached using thermal interface material |
| cycle_count | charge/discharge cycle count. It goes from 0 to 100 for the main cycle and from 0 to 1000 for the resistance cycle. The two cycles are interleaved i.e. 0->100->0->1000->0->100... |
-
delivery SOC
discharge at 5A until Veod (line code: 12)
-
capacity test
CC-CV charge at 1A until cutoff=4.2V, termination at 0,05A (line code: 17)
discharge, 0,2A (line code: 19)
-
resistance cycle
two steps alternated:
first step, discharge at 0,5A for 10s (line code: 29)
second step, discharge at 5A for 1s (line code: 30)
-
main cycle
CC-CV charge at 1.8A until cutoff=4.2V, termination at 0,1A (line code: 37)
discharge at 5A until Veod (line code: 40)
-
repeat the main cycle (point 4) 100 times, then perform a capacity test (point 2) and a resistance cycle (point 3), redo point 5
000-XW-Y.Y-AABB-T
000 = sample serial number
X = lecter related to cell manufacturer
W = cell type | P: powertool, M: mid power, E: e-byke
Y.Y = cell capacity e.g. 2.5Ah -> 2.5
AABB = samples delivery date (AA: week, bb: year)
T = test type | S: Standard (5A discharge), H: High Current (8A discharge), P: Pre-conditioned (90 days storing at 45C degree before testing)