Nickel Cadmium Batteries

Abstract: Sets out recommended practices for the installation, maintenance, testing and replacement of vented secondary batteries permanently installed in buildings.
Scope:
This Standard sets out recommended practices for the installation, maintenance, testing and replacement of vented secondary batteries permanently installed in or on buildings. It also provides guidance to determine when batteries should be replaced.

Jan 2005 - Administratively Withdrawn Safety precautions;
The document provides safety precautions, installation design considerations, and procedures for receiving, storing, commissioning, and maintaining pocket- and fiber-plate Nickel Cadmium storage batteries for PV power systems. Disposal and recycling recommendations are also discussed. This recommended practice applies to all PV power systems, regardless of size or application that contain Nickel Cadmium battery storage subsystems.

The document discusses VLA, VRLA, and Nickel Cadmium stationary battery installations and is intended to serve as a bridge between the electrical designer and the heating, ventilation, and air-conditioning (HVAC) designer. Ventilation of stationary battery installations is critical to maximize battery life while minimizing the hazards associated with hydrogen production. This guide describes battery operating modes and the hazards associated with each. It provides the HVAC designer with the information to provide a cost-effective ventilation solution.

This Part of IEC 62485 specifies the basic requirements for secondary batteries and battery installations. The requirements regarding safety, reliability, life expectancy, mechanical strength, cycle stability, internal resistance, and battery temperature, are determined by various applications, and this, in turn, determines the selection of the battery design and technology. In general, the requirements and definitions are specified for Lead-Acid and Nickel Cadmium batteries. For other battery systems with aqueous electrolyte, the requirements may be applied accordingly.

This part of IEC 62485 applies to secondary batteries and battery installations used for electric vehicles (e.g., in electric industrial trucks, including lift trucks, tow trucks, cleaning machines, automatic guided vehicles), battery powered locomotives, electric vehicles (e.g., goods vehicles, golf carts, bicycles, wheelchairs) and does not cover the design of such vehicles. The standard covers Lead dioxide-Lead (Lead-Acid), nickel oxide-cadmium, nickel-oxide-metal hydride and other alkaline secondary batteries.

The document outlines the fundamental conditions necessary for the creation of each hazard. It includes identification and characterization of the possible hazards inherent in the application, use, and abuse of Nickel Cadmium cells and batteries. It also includes examples for appliance design which minimizes these hazards. Additionally it presents some typical but non-exhaustive examples of misuse that may precipitate or actions which mitigate the hazard.

The document provides recommendations for installation design and for installation, maintenance, and testing procedures to optimize life and performance of vented Nickel Cadmium batteries in stationary standby applications. Also provides guidance for determining when these batteries should be replaced.

The document defines the areas of recommended knowledge for installers and maintainers of stationary batteries and related systems to the extent that they affect the battery. Design of the dc system and sizing of the dc battery charger(s) are beyond the scope of this recommended practice. This document covers Lead-Acid and Nickel Cadmium battery technologies.

The standard applies to a 1500 VDC limit, protection against electricity, gas emission and electrolyte. It is limited to Lead-Acid and nickel technologies in applications for telecom, PV, uninterruptable power supply (UPS), emergency lighting, power station, stationary engine starting.

The standard specifies marking, tests and requirements for sealed nickel cadmium prismatic secondary single cells.