Cd-technologies RS-2061 Standby Batteries for Renewable Energy App Manuel d'utilisateur télécharger pdf (Page 11)

Charging Voltage Temperature Compensation Chart

Electrolyte Freezing

To prevent freezing make be sure maintain a high state of charge and thus a high specific gravity in the bat-

tery. The following graph gives the freezing point of the electrolyte at different specific gravities.

Testing

Batteries are rated on an ampere-hour basis or on their ability to deliver a certain number of amperes to the

load for a specified amount of time before cell voltages drop to a given potential. It is important to realize that

the ampere-hour capacity of a cell or battery depends on the rate at which it is discharged.

The C&D Technologies lead acid battery and cells are designed for optimum discharge characteristics of

long rate discharge. This permits batteries to discharge to lower end-potentials of 1.90 volts per cell. It is

also important to consider low ambient operating temperatures when calculating required battery size.

Low operating temperatures will reduce available battery capacity significantly.

To be valid, a capacity test must assume the following:

• Afullychargedbatteryandbalancedcellpotentials.Insomecases,thismayrequireanequalize

charge or, in cases of sulfation, other action. Consult the C&D Technologies Technical Services

Department.

• Allcellsequalizedtotheirnominalspecificgravity.Thismayrequireadditionorwithdrawalofacid

and should only be done following a complete recharge and equalizing charge.

• Atleast72hoursonnominalsystemvoltage.Thisisespeciallyimportantfollowinganequalizecharge,

to clear excessive gasses developed at the surface of the plates by letting the battery rest off charge or

on float charge.

• Temperaturecorrectionforcellstestedatanytemperatureotherthan77°F(25°C).

• Batteriesarefullychargedandallconnectionsarecorrect.

CPV Models

VR Solar

D, K, L - CPS

+ 2.8 mV/F per cell below 77°F (25°C)

- 2.8 mV/F per cell above 77°F (25°C)

+ 3.0 mV/F per cell below 77°F (25°C)

- 3.0 mV/F per cell above 77°F (25°C)

+ 2.8 mV/F per cell below 77°F (25°C)

- 2.8 mV/F per cell above 77°F (25°C)

Battery Series Temperature Compensation

RS02061/0514/CD 11 www.cdtechno.com

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Cd-technologies RS-2061 Standby Batteries for Renewable Energy App Manuel d'utilisateur Page 11