Electrical Energy Storage

Recommendation ITU-T L.1222 is based on Recommendation ITU-T L.1220 and is the part related to supercapacitors. Recommendation ITU-T L.1222 contains selection criteria for telecommunication application based on main performance parameters and the methods for proper use. In addition, some use cases and examples are given in an Appendix to help users.

This Recommendation is the subpart 2, battery of a series of Recommendations on innovative energy storage system for stationary power system of telecom/ICT equipment used in telecom networks, datacenters and CPE. This subpart introduces technologies and methods for evaluating, selecting and testing battery systems for defined applications.

With the increase of new technologies of energy storage there is need for a global overview of an energy storage system for use in stationary information and communication technology (ICT) installation in network, data centre and customer premises equipment (CPE), and simple evaluation of acceptable duration and characterization methods for this specific purpose. This Recommendation introduces an open series of documents for different families of technologies (battery systems, super-capacitor systems, etc.) that will be enriched progressively as new technologies emerge that may have a possible significant impact in the field of energy storage. Identified parts of the Recommendation series innovative energy storage technology for stationary use are: - Part 1: Overview of energy storage - Part 2: Battery - Part 3: Super-capacitor technology

The proportion of Renewable Energies is likely to increase in all major electricity markets. Their large scale incorporation into existing electricity grids will be complex, and their successful integration will likely depend on large-capacity Electrical Energy Storage. his White Paper’s primary goal is to provide a global view on the state of the art and future directions for grid integration of large-capacity Renewable Energy sources and the application of large-capacity Energy Storage for that purpose. It identifies challenges for grid operators and producers of electricity, and provides insights into current and potential methods for addressing these difficulties. The White Paper aims to support grid integration efforts around the world by providing guidance to the electric utility industry, policy makers and the IEC standardization and conformity assessment community. This White Paper was developed with CTOs (Chief Technology Officers) of major technology companies who participate in the IEC MSB (Market Strategy Board) in cooperation with RASEI (the Renewable and Sustainable Energy Institute) at NIST (the US National Institute of Science and Technology) and the University of Colorado at Boulder, and SGCC (State Grid Corporation of China).

The proportion of Renewable Energies is likely to increase in all major electricity markets. Their large scale incorporation into existing electricity grids will be complex, and their successful integration will likely depend on large-capacity Electrical Energy Storage. This White Paper’s primary goal is to provide a global view on the state of the art and future directions for grid integration of large-capacity Renewable Energy sources and the application of large-capacity Energy Storage for that purpose. It identifies challenges for grid operators and producers of electricity, and provides insights into current and potential methods for addressing these difficulties. The White Paper aims to support grid integration efforts around the world by providing guidance to the electric utility industry, policy makers and the IEC standardization and conformity assessment community. This White Paper was developed with CTOs (Chief Technology Officers) of major technology companies who participate in the IEC MSB (Market Strategy Board) in cooperation with RASEI (the Renewable and Sustainable Energy Institute) at NIST (the US National Institute of Science and Technology) and the University of Colorado at Boulder, and SGCC (State Grid Corporation of China).

IEC TS 62933-5-1:2017 specifies safety considerations (e.g. hazards identification, risk assessment, risk mitigation) applicable to EES systems integrated with the electrical grid. This document provides criteria to foster the safe application and use of electric energy storage systems of any type or size intended for grid-integrated applications.

IEC TS 62933-4-1:2017(E) describes environmental issues associated with electrical energy storage systems (EES systems), and presents guidelines to address the environmental impacts to and from EES systems including the impacts to humans due to chronic exposure associated with the mentioned environmental impacts.

IEC/TS 62933-3-1:2018(E) is applicable to EES systems designed for grid-connected indoor or outdoor installation and operation. This document considers necessary functions and capabilities of EES systems, test items and performance assessment methods for EES systems, requirements for monitoring and acquisition of EES system operating parameters, exchange of system information and control capabilities required.

IEC 63056:2020 specifies requirements and tests for the product safety of secondary lithium cells and batteries used in electrical energy storage systems (Figure 2) with a maximum DC voltage of 1 500 V (nominal). Basic safety requirements for the secondary lithium cells and batteries used in industrial applications are included in IEC 62619. This document provides additional or specific requirements for electrical energy storage systems. Since this document covers batteries for various electrical energy storage systems, it includes those requirements which are common and minimum to the electrical energy storage systems. Examples of appliances that are within the scope of this document are: • telecommunications, • central emergency lighting and alarm systems, • stationary engine starting, • photovoltaic systems, • home (residential) energy storage systems (HESS), and • large energy storage: on-grid/off-grid. This document applies to cells and batteries for uninterruptible power supplies (UPS). This document does not apply to portable systems 500 Wh or below, which are covered by IEC 61960-3.

IEC 62933-5-2:2020 primarily describes safety aspects for people and, where appropriate, safety matters related to the surroundings and living beings for grid-connected energy storage systems where an electrochemical storage subsystem is used.