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GB/T 42315-2023: Code of maintenance for electrochemical energy storage station
GB/T 42315-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.180
CCS F 19
Code of maintenance for electrochemical energy storage
station
ISSUED ON: MARCH 17, 2023
IMPLEMENTED ON: OCTOBER 01, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 6
4 General requirements ... 6
5 Maintenance of battery arrays ... 7
6 Maintenance of power conversion system ... 18
7 Maintenance of monitoring and control system ... 21
8 Maintenance of auxiliary facilities ... 22
Code of maintenance for electrochemical energy storage
station
1 Scope
This document specifies the items, methods and quality requirements for battery arrays,
power conversion systems, monitoring and control systems and auxiliary facilities of
the electrochemical energy storage station.
This document is applicable to electrochemical energy storage stations – with a power
of 500 kW and an energy of 500 kW·h and above – that use lithium ion batteries, lead-
carbon batteries, flow batteries, and fuel cells as energy storage carriers. It also applies
as a reference to other electrochemical energy storage stations.
2 Normative references
The following documents are referred to in the text in such a way that some or all of
their content constitutes requirements of this document. For dated references, only the
version corresponding to that date is applicable to this document; for undated references,
the latest version (including all amendments) is applicable to this document.
GB/T 1094.6, Power transformers - Part 6: Reactors
GB/T 1094.11, Power transformers - Part 11: Dry-type transformers
GB 4962, Technical safety regulation for gaseous hydrogen use
GB/T 12706 (all parts), Power cables with extruded insulation and their accessories
for rated voltages from 1 kV (Um = 1.2 kV) up to 35 kV (Um = 40.5 kV)
GB/T 17702, Capacitors for power electronics
GB/T 20840.2, Instrument transformers - Part 2: Additional requirements for current
transformers
GB/T 20840.3, Instrument transformers - Part 3: Additional requirements for
inductive voltage transformers
GB/T 24499, Technology glossary for gaseous hydrogen, hydrogen energy and
hydrogen energy system
GB 32311, Minimum allowable values of energy efficiency and energy efficiency
grades for hydrogen producing systems by water electrolysis
3 Terms and definitions
Terms and definitions determined by DL/T 2528 and GB/T 24499 are applicable to this
document.
4 General requirements
4.1 Before the maintenance of the electrochemical energy storage station, a
maintenance schedule shall be formulated; also, a maintenance plan and an emergency
plan shall be compiled.
4.2 The maintenance of the electrochemical energy storage station includes scheduled
maintenance and troubleshooting; also, a condition-based maintenance should be
carried out according to the operation of the equipment. The cycle of scheduled
maintenance – which should be 1 year – can be adjusted according to the assessment
results. The condition-based maintenance should be determined according to the
comprehensive assessment results of equipment operating status, fault location, fault
type and severity based on operating data.
4.3 The maintenance operation shall be carried out in the aspects of appearance
inspection, inspection test, repair, post-repair test, etc. in combining with equipment
status. An overall performance test of the energy storage system shall be carried out
after the replacement of main components such as battery arrays, power conversion
systems, and monitoring and control systems.
4.4 The maintenance of primary equipment such as voltage transformers, switches,
surge arresters, and transformers shall be carried out in accordance with the provisions
of DL/T 573, DL/T 727, DL/T 1686, DL/T 1689, DL/T 1700, and DL/T 1702; the
maintenance of secondary equipment such as AC-DC system for station, relay
protection and automation, and metering shall be carried out in accordance with the
regulations of DL/T 724, DL/T 995, and DL/T 1664.
4.5 Maintenance personnel shall be trained regularly to be familiar with the design
requirements, running conditions and equipment technical requirements of the power
station, and to master the maintenance skills and quality requirements of the power
station equipment.
4.6 Maintenance tools and appliances shall be inspected and calibrated regularly, and
used within the inspection and calibration date.
4.7 Maintenance personnel shall prepare spare parts in advance according to the
maintenance schedule and order cycle time.
4.8 The maintenance safety of the electrochemical energy storage station shall meet the
requirements of GB/T 42288.
4.9 The electrochemical energy storage station shall formulate environmental
protection measures during the maintenance process. Waste batteries and electrolytes
shall be recycled.
4.10 After the maintenance is completed, a maintenance assessment of the energy
storage station shall be carried out, and a maintenance report shall be compiled.
5 Maintenance of battery arrays
5.1 General provisions
5.1.1 Before the maintenance of battery arrays, the primary circuit AC/DC circuit
breaker and isolating switch shall be disconnected, a grounding wire shall be installed
on the AC side of the power conversion system, and a safety warning sign shall be hung.
5.1.2 During battery maintenance, the positive and negative poles of battery cells,
battery modules, battery clusters, and stacks shall not be short-circuited or reversed.
5.1.3 After the maintenance of lithium ion batteries, lead-carbon batteries, flow batteries
and fuel cell arrays, the total voltage balance among battery clusters of the same battery
array should be adjusted. The total voltage range between lithium ion battery and lead-
carbon battery clusters shall not be greater than 2% of the average value; the total
voltage range between flow battery clusters shall not be greater than 4% of the average
value; the total voltage range between fuel cell clusters shall not be greater than 5% of
the rated value.
5.2 Maintenance of lithium ion battery arrays
5.2.1 Appearance inspection
5.2.1.1 Check the appearance of the battery module, including deformation, cracking,
leakage, corrosion and tightness of electrical connections.
5.2.1.2 Check the deformation, damage, corrosion of the battery bracket and the
tightness of connection of the grounding wire.
5.2.1.3 Check the air-cooling system of the battery array, including fan rotation and
abnormal noise.
5.2.1.4 Check the liquid cooling system of the battery array, including liquid cooling
system liquid level, temperature, circulating pump rotation, flow rate, abnormal noise,
liquid cooling system circulating pump, pipes, valves, flange connection circuit leakage,
damage, cracking and valve switch.
5.2.1.5 Check the connection tightness of power lines and communication lines of the
battery management system, as well as the working voltage of the battery management
system, and the display of the work indicating lamp.
5.2.3.5 Before replacing battery cells and modules, new battery cells and modules shall
be tested for voltage and insulation resistance, where the test results shall meet the
requirements of GB/T 36276.
5.2.3.6 When the voltage and temperatur...