The SOC range shall be defined by t

The SOC range shall be defined by the customer, otherwise the cycle test shall be performed between 100 % and 20 % SOC. The cycle test shall be started from the upper limit of SOC with a sequence by performing the dynamic discharge power profile A, followed by the dynamic discharge power profile B and then followed by the dynamic discharge power profile A until SOC reaches the lower limit or the battery voltage reaches the lower voltage limit specified by the supplier. Within the next step, the battery system shall be charged according to the supplier's recommendation to the upper limit of SOC with the requirement to maintain the total time for the discharge–charge cycle including a rest time for cell balancing to 8 h. This sequence of dynamic discharge power profiles including charging shall be repeated during the following 28 d. After these cycling activities the capacity and pulse power characterization tests shall be performed to determine the current status of the battery system. After this performance testing, the life cycling testing shall be continued until the test has been terminated according to the specified criteria; see end of test criteria in 7.10.2.2.5. The SOC limit can be detected by one of the following: — SOC calculated, i.e. by the BCU for a battery system test; — Ah counted by external measurement; — battery voltage upper and lower limits defined by the supplier. 7.10.2.2.1.2 Test sequence battery system cycle life test for dynamic discharge applicationsTable 29 — Test sequence battery system cycle life test for dynamic discharge applications