IEC TR 62933-3-200:2025

IEC TR 62933-3-200 ®
Edition 1.0 2025-05
TECHNICAL
REPORT
Electrical energy storage (EES) systems –
Part 3-200: Planning and performance assessment of electrical energy storage
systems – Design principles of electrochemical based EES systems
ICS 13.020.30  ISBN 978-2-8327-0100-3

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– 2 – IEC TR 62933-3-200:2025 © IEC 2025
CONTENTS
FOREWORD . 8
1 Scope . 10
2 Normative references . 10
3 Terms, definitions and abbreviated terms . 10
3.1 Terms and definitions . 10
3.2 Abbreviated terms . 11
4 Overview of electrochemical based EES systems . 12
4.1 General . 12
4.2 Application functions . 12
4.3 System structure . 13
4.4 Functions of subsystems . 13
4.4.1 General . 13
4.4.2 Accumulation subsystem . 13
4.4.3 Power conversion subsystem (PCS) . 14
4.4.4 Auxiliary subsystem . 14
4.4.5 Control subsystem . 14
5 Design cases of electrochemical based EES systems in power generation side . 15
5.1 Case 1: 30 MW/15 MWh LFP EESS . 15
5.1.1 General information . 15
5.1.2 Integration scheme . 15
5.1.3 Site and layout. 17
5.1.4 Design of subsystems . 18
5.2 Case 2: 15 MW/60 MWh FB EESS . 23
5.2.1 General information . 23
5.2.2 Integration scheme . 24
5.2.3 Site and layout. 25
5.2.4 Design of subsystems . 26
5.3 Case 3: 50 MW/300 MWh NAS EESS . 29
5.3.1 General information . 29
5.3.2 Integration scheme . 29
5.3.3 Site and layout. 31
5.3.4 Design of subsystems . 32
5.4 Case 4: 100 MW/400 MWh FB EESS . 35
5.4.1 General information . 35
5.4.2 Integration scheme . 36
5.4.3 Site and layout. 38
5.4.4 Design of subsystems . 38
6 Design cases of electrochemical based EES systems in transmission and
distribution side . 42
6.1 Case 5: 99,8 MW/99,8 MWh LFP/NCM EESS. 42
6.1.1 General information . 42
6.1.2 Integration scheme . 43
6.1.3 Site and layout. 43
6.1.4 Design of subsystems . 45
6.2 Case 6: 7,2 MW/8,6 MWh hybrid EESS . 48
6.2.1 General information . 48
6.2.2 Integration scheme . 49

6.2.3 Site and layout. 50
6.2.4 Design of subsystems . 51
6.3 Case 7: 100 MW/200 MWh LFP EESS . 53
6.3.1 General information . 53
6.3.2 Integration scheme . 54
6.3.3 Site and layout. 54
6.3.4 Design of subsystems . 56
6.4 Case 8: 70 MW/140 MWh LFP EESS . 58
6.4.1 General information . 58
6.4.2 Integration scheme . 59
6.4.3 Site and layout. 59
6.4.4 Design of subsystems . 60
6.5 Case 9: 12 MW/37 MWh NCM EESS . 64
6.5.1 General information . 64
6.5.2 Integration scheme . 65
6.5.3 Site and layout. 67
6.5.4 Design of subsystems . 69
7 Design cases of electrochemical based EES systems in customer side . 77
7.1 Case 10: 1 MW/1 MWh Li-ion EESS with PV in a performance verified
project . 77
7.1.1 General information . 77
7.1.2 Integration scheme . 77
7.1.3 Site and layout. 78
7.1.4 Design of subsystems . 78
7.2 Case 11: 1 MW/3 MWh LC EESS in PV-storage-charging building . 82
7.2.1 General information . 82
7.2.2 Integration scheme . 83
7.2.3 Site and layout. 83
7.2.4 Design of subsystems . 85
7.3 Case 12: 1 MW × 7 h/3 MW × 13,5 s NAS EESS in standby power system. 88
7.3.1 General information . 88
7.3.2 Integration scheme . 89
7.3.3 Site and layout. 90
7.3.4 Design of subsystems . 90
8 Design considerations for electrochemical based EES systems . 92
8.1 Application functions . 92
8.1.1 Application functions in typical scenarios . 92
8.1.2 Priority of application functions in typical scenarios . 92
8.2 Sizing and selection of battery . 93
8.2.1 Battery sizing . 93
8.2.2 Battery selection . 93
8.3 Integration scheme . 95
8.3.1 Primary POC scheme . 95
8.3.2 Auxiliary POC scheme . 95
8.4 Site and layout . 96
8.4.1 Site . 96
8.4.2 Layout . 96
8.5 Subsystem scheme . 97
8.5.1 Accumulation subsystem . 97

– 4 – IEC TR 62933-3-200:2025 © IEC 2025
8.5.2 Power conversion subsystem . 97
8.5.3 Auxiliary subsystem . 101
8.5.4 Protection subsystem . 102
8.5.5 Communication subsystem . 103
8.5.6 Management subsystem . 103
8.6 System safety measures .
...