IEC 62932-2-1 :2020 pdf download – Flow battery energy systems for stationary applications – Part 2-1: Performance general requirements and test methods.
5.4 Test object In the definition of the test object, the boundary shall physically cover or include the following: – for the FBS: BMS, BSS, pumps; – for the FBES: BMS, BSS, pumps, PCS; – for the TOU: BMS, BSS, pumps, with or without PCS. In an FBES or FBS or TOU, the auxiliary energy either at DC or AC level has to be taken into account. To ensure transparency in data, the relevant and appropriate POM and POC as defined in Figure 2, conditions a), b) or c) shall be recorded and reported. A schematic layout of the components forming the test units and their interconnection points shall accompany the test object description. 5.5 Test object unit (TOU) selection – The FBES or FBS shall be tested in a defined layout. – When due to test facility, costs or similar limitations this is not possible or desirable then a representative test object unit (TOU) shall be defined and tested instead. – This test object unit (TOU) shall encompass all components as defined in the test boundary for an FBES or an FBS. – These components shall be sized to match the TOU if needed or possible. – The final assembly of the TOU shall faithfully represent the full-sized FBES or FBS so that the test data obtained therewith can be extrapolated to them. – The tested FBS, FBES or TOU shall be fully described in the relevant test report. – Auxiliary energy data shall be scaled to the size of the TOU tested. – All tests shall be carried out with the same and identical FBS, FBES or TOU throughout the duration of the test.
6.2 Determination of maximum deliverable output power 6.2.1 General The maximum deliverable output power is affected by the discharge time, the state of charge, the ambient temperature and the auxiliary power needs for the FBES/FBS or TOU operation. Any maximum deliverable output power value determined is hence representative or applicable only to the specific operation condition of the FBES/FBS or TOU as mentioned above. 6.2.2 Test procedures The test for the determining the maximum deliverable output power shall be in accordance with the following procedures: a) The duration of discharge t d shall be defined before the test. The defined duration of 1 /50 rated energy to rated power is recommended. The manufacturer shall, alternatively, declare the duration time used. b) The test unit shall be charged to a desired state of charge according to the method declared by the manufacturer. c) The test unit shall be discharged at a constant selected power level until the end-of- discharge is reached. The duration time of discharge shall be recorded. The power level shall be kept constant to within ±2 %. It shall be noted that the selected discharge power level shall not cause irreversible damage to the unit. d) If the duration of discharge t is higher than the defined duration value t d , repeat b) and c) with an increased power level until the determined duration value t d of discharge is achieved. All the other conditions (such as ambient temperature, end-of-discharge) shall be kept constant. It is recommended to conduct the test from higher power to lower power. e) If the duration of discharge t is lower than the defined duration t d , repeat b) and c) with a decreased power level until the defined duration t d of discharge is achieved. All the other conditions (such as ambient temperature, end-of-discharge) shall be kept constant.