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Saft SBH - User Manual

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Nickel-cadmium block battery
Technical manual

Table of Contents

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Summary

Benefits of the block battery

Complete reliability

The block battery does not suffer from the sudden death failure associated with the lead acid battery.

Long cycle life

The block battery has a long cycle life even when the charge/discharge cycle involves 100% depth of discharge.

Exceptionally long lifetime

A lifetime in excess of twenty years is achieved by the Saft Nife block battery in many applications.

Low maintenance

With its generous electrolyte reserve, the block battery reduces the need for topping up with water.

Wide operating temperature range

The block battery has an electrolyte which allows it to have a normal operating temperature of from -20°C to +50°C.

Fast recharge

The block battery can be recharged at currents which allow very fast recharge times to be achieved.

Electrochemistry of nickel-cadmium batteries

Construction features of the block battery

Plate assembly

The nickel-cadmium cell consists of two groups of plates, the positive containing nickel hydroxide.

Battery types and applications

Type L

The SBL is designed for applications where the battery is required to provide a reliable source of energy over relatively long discharge periods.

Operating features

Effect of temperature on performance

Low temperature operation has the effect of reducing the performance, but the higher temperature characteristics are similar to those at normal temperatures.

Cycling

The block battery is designed to withstand the wide range of cycling behavior encountered in stationary applications.

Effect of temperature on lifetime

The block battery is designed as a twenty year life product, but increasing temperature reduces the expected life.

Battery sizing principles in stationary standby applications

The voltage window

This is the maximum voltage and the minimum voltage at the battery terminals acceptable for the system.

Discharge profile

This is the electrical performance required from the battery for the application.

Temperature

The maximum and minimum temperatures and the normal ambient temperature will have an influence on the sizing of the battery.

Battery charging

Constant voltage charging methods

Batteries in stationary applications are normally charged by a constant voltage float system.

Charge acceptance

Charge efficiency, Temperature effects, Commissioning charge

Charge efficiency

The charge efficiency of the battery is dependent on the state of charge of the battery and the temperature.

Commissioning charge

It is recommended that a good first charge should be given to the battery.

Installation and storage

Maintenance of block batteries in service

Capacity check, Changing electrolyte, Recommended maintenance procedure

Recommended maintenance procedure

In order to obtain the best from your battery, the following maintenance procedure is recommended.

Saft SBH Specifications

General IconGeneral
BrandSaft
ModelSBH
CategoryBattery Pack
LanguageEnglish

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