prEN IEC 62933-5-2:2024

SLOVENSKI STANDARD
01-maj-2024
Električne naprave za shranjevanje energije (EES) - 5-2. del: Varnostne zahteve za
sisteme EES, integrirane v omrežje - Elektrokemični sistemi
Electrical energy storage (EES) systems - Part 5-2: Safety requirements for grid-
integrated EES systems - Electrochemical-based systems
Elektrische Energiespeichersysteme (EES-Systeme) - Teil 5-2:
Sicherheitsanforderungen an netzintegrierte EES-Systeme - Elektrochemische Systeme
Systèmes de stockage de l'énergie électrique (EES) - Partie 5-2: Exigences de sécurité
pour les systèmes EES intégrés dans un réseau - Systèmes électrochimiques
Ta slovenski standard je istoveten z: prEN IEC 62933-5-2:2024
ICS:
27.010 Prenos energije in toplote na Energy and heat transfer
splošno engineering in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

120/353/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62933-5-2 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-03-15 2024-06-07
SUPERSEDES DOCUMENTS:
120/326/CD, 120/348/CC
IEC TC 120 : ELECTRICAL ENERGY STORAGE (EES) SYSTEMS
SECRETARIAT: SECRETARY:
Japan Mr Masatake SAKUMA
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

TC 8,TC 21,SC 21A,TC 22,SC 22E,TC 57,TC
64,TC 69,TC 82,TC 88,TC 105,CISPR
Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is
the final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Electrical energy storage (EES) systems - Part 5-2: Safety requirements for grid-integrated EES
systems - Electrochemical-based systems

PROPOSED STABILITY DATE: 2029
NOTE FROM TC/SC OFFICERS:
This CDV reflects the observations made in 120/348/CC.

download this electronic file, to make a copy and to print out the content for the sole purpose of preparing National
Committee positions. You may not copy or "mirror" the file or printed version of the document, or any part of it,
for any other purpose without permission in writing from IEC.

IEC CDV 62933-5-2 © IEC 2024 2 120/353/CDV
1 CONTENTS
3 FOREWORD . 6
4 INTRODUCTION . 8
5 Scope . 9
6 Normative references. 9
7 Terms and definitions . 10
8 Basic guidelines for safety of BESS . 11
9 4.1 General . 11
10 4.2 Approach to BESS safety . 13
11 4.3 BESS changes in ownership, control or use . 15
12 Hazard considerations . 15
13 BESS system risk assessment . 16
14 6.1 BESS structure . 16
15 6.1.1 General characteristics . 16
16 6.1.2 Specific characteristics . 17
17 6.1.3 Specific BESS implementation location . 17
18 6.2 Description of BESS conditions . 17
19 6.3 Risk analysis . 17
20 6.3.1 General . 17
21 6.3.2 Hazard identification specific to BESS . 18
22 6.3.3 Risk consideration . 18
23 6.3.4 System level risk analysis . 18
24 6.4 System level risk assessment . 18
25 Requirements necessary to reduce risks . 18
26 7.1 General measures to reduce risks . 18
27 7.2 Preventive measures against damage to neighbouring inhabitants . 19
28 7.3 Preventive measures against physical injury or damage to the health of
29 workers and residents . 19
30 7.4 Over current protection design . 19
31 7.5 BESS disconnection and shutdown . 19
32 7.6 Operation and maintenance . 19
33 7.7 Staff training . 19
34 7.8 Safety design . 19
35 7.9 General requirements for BESS safety . 19
36 7.10 Inherently safe design of BESS . 20
37 7.10.1 Protection from electrical hazards . 20
38 7.10.2 Protection from mechanical hazards . 21
39 7.10.3 Protection from explosion . 21
40 7.10.4 Protection from hazards arising from electric, magnetic, and
41 electromagnetic fields . 22
42 7.10.5 Protection from fire hazards . 22
43 7.10.6 Protection from temperature hazards . 22
44 7.10.7 Protection from chemical effects . 22
45 7.10.8 Protection from hazards arising from auxiliary, control and
46 communication system malfunctions . 23
47 7.10.9 Protection from hazards arising from environments . 23
48 7.11 Guards and protective measures . 23
49 7.11.1 General . 23

IEC CDV 62933-5-2 © IEC 2024 3 120/353/CDV
50 7.11.2 BESS disconnection and shutdown . 24
51 7.11.3 Other guards and protective functions of BESS . 25
52 7.12 Information for end users . 29
53 7.13 Life cycle safety management . 30
54 7.13.1 Operation and maintenance . 30
55 7.13.2 Partial system change . 33
56 7.13.3 Design revision . 33
57 7.13.4 End of service life management . 33
58 7.13.5 Measures for validating life cycle safety management . 33
59 System validation and testing . 33
60 8.1 General . 33
61 8.2 Validation and testing of BESS . 37
62 8.2.1 Electrical hazards . 37
63 8.2.2 Mechanical hazards . 42
64 8.2.3 Explosion . 42
65 8.2.4 Hazards arising from electric, magnetic, and electromagnetic fields . 45
66 8.2.5 Fire hazards (propagation) . 45
67 8.2.6 Temperature hazards . 46
68 8.2.7 Chemical effects . 48
69 8.2.8 Hazards arising from auxiliary, control and communication system
70 malfunctions . 48
71 8.2.9 Hazards arising from environments . 48
72 8.2.10 IP rating of BESS enclosure and protective guards . 49
73 Guidelines and manuals . 49
74 Annex A (informative)  Ownership models of BESS . 50
75 Annex B (informative)  BESS hazards and risks . 51
76 B.1 General introduction . 51
77 B.2 Hazards to be addressed . 57
78 B.2.1 General . 57
79 B.2.2 Fire hazards. 57
80 B.2.3 Chemical hazards . 57
81 B.2.4 Electrical hazards . 57
82 B.2.5 Stored electrical energy hazards . 57
83 B.2.6 Physical hazards . 58
84 B.2.7 High-pressure hazards . 58
85 B.3 Hazard considerations under normal operating conditions . 58
86 B.3.1 Fire and explosive hazards . 58
87 B.3.2 Chemical hazards . 58
88 B.3.3 Electrical hazards . 59
89 B.3.4 Physical hazards . 59
90 B.4 Hazard considerations under emergency/abnormal conditions . 59
91 B.4.1 Fire hazards. 59
92 B.4.2 Chemical hazards . 60
93 B.4.3 Electrical hazards . 61
94 B.4.4 Physical hazards . 61
95 B.5 Commercially available battery technologies . 61
96 B.5.1 Lithium ion (Li-ion) batteries (C-A) . 61
97 B.5.2 Lead-acid batteries (C-B) . 62
98 B.5.3 Nickel batteries (C-B) . 63
99 B.5.4 High-temperature sodium batteries (C-C) . 65
...