IEEE 1115-2000 pdf download IEEE Recommended Practice for Sizing Nickel-Cadmium Batteries for Stationary Applications
1.Overview
This recommended practice describes methods for defining the dc load and for sizing a nickel-cadmiumbattery to supply that load, Some factors relating to cell selection are provided for consideration.
1.1 Scope
This recommended practice covers the sizing of nickel-cadmium batteries used in full float operation forstationary applications.Installation, maintenance, qualification, testing procedures, and consideration ofbattery types other than nickel-cadmium batteries are beyond the scope of this recommended practice.
Design of the dc system and sizing of the battery charger(s) are also beyond the scope of this recommendedpractice.
1.2 Purpose
The purpose of this recommended practice is to provide a proven and standardized sizing technique fornickel-cadmium batteries. This sizing method takes normal usage factors into account, and forms the basisfor reliable battery operation.
2.References
This standard shall be used in conjunction with the following publications.
IEEE Std 1106-1995,1EEE Recommended Practice for Installation, Maintenance,Testing, and Replacementof Vented Nickel-Cadmium Batteries for Stationary Applications.
IEEE Std 1184-1994, IEEE Guide for the Selection and Sizing of Batteries for Uninterruptible PowerSystems .
3. Definitions
The following definitions apply specifically to this recommended practice. For terms not defined in thisclause, please refer to the documents listed in Clause 2.2
3.1 available capacity: The capacity for a given discharge time and end-of-discharge voltage that can bewithdrawn from a cell under the specific conditions of operation.
3.2 battery duty cycle: The loads a battery is expected to supply for specified time periods.
3.3 full float (constant potential) operation: Operation of a dc system with the battery, battery charger, andload all connected in parallel and with the battery charger supplying the normal dc load plus any self-discharge or charging current required by the battery. (The battery will deliver current only when the loadexceeds the charger output.)
3.4 period: An interval of time in the battery duty cycle during which the load is assumed to be constant forpurposes of cell sizing calculations.
3.5 rated capacity (nickel-cadmium cell): The capacity assigned to a nickel-cadmium cell by its manufacturer for a specific constant current discharge, with a given discharge time, at a specified electrolytetemperature, to a given end-of-discharge voltage. The conditions used to establish rated capacity are basedon a constant current charge, in accordance with IEC 60623 (1990-03) [B23
4. Defining loads
4.1 General considerations
The duty cycle imposed on the battery by any of the conditions described here will depend on the dc systemdesign and the requirements of the installation. The battery must supply the dc power requirement when thefollowing conditions occur:
IEEE 1115-2000 pdf download
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