Interfacing the aluminium-air battery with telecommunications equipment
The tests carried out by British Telecom (BT) on the aluminum-air battery with regard to using the battery in a standby power system are described. The background to BT's interest in the aluminium-air battery is outlined along with the design considerations of a prototype power system to be installed in the switching network. The need for an interfacing DC/DC converter between the battery and the equipment is described, and the converter's novel features and operation are explained.<<ETX>>
A total battery monitoring program for the telecommunications industry
Considerable information has been provided on valve-regulated Pb-acid (VRLA) batteries concerning battery and ambient temperatures, float voltage for cells and strings, float current, and battery capacity. Often these characteristics have been considered separately or in incomplete sets. Telecommunications personnel using the Pb-acid battery in the field do not have a comprehensive, single source for reference. A source is needed that provides guidelines for selecting the various points of operation with a brief explanation for each. This paper meets this need by describing a program for total battery monitoring, management, record keeping, and maintenance. Monitored characteristics and selected ranges are justified by reference to published information. This program utilizes existing information to provide optimal battery life, battery capacity, remaining operating time both at present load and at maximum load, energy efficiency, and warranty records with less personnel. This program also locates deficient cells or blocks and provides records to indicate conditions that lead to the failure and to provide support of a warrantee claim. A reduction in personnel is possible, since sites only require attention when a problem is indicated and the proper equipment to correct the problem can be obtained before the site visit.<<ETX>>
Aluminium and electrochemical energy conversion
Revue des developpements dans l'utilisation de l'aluminium dans les sources d'energie electrochimique, notamment dans son application dans les piles. Deux lignes d'etudes sont realisees en fonction de la nature de l'electrolyte: alcalin ou salin. Applications pratiques, aspect ecologique et perspectives