TEMPERATURE COMPENSATION. DSE DSE9155, DSE9255, DSE9130, DSE9150

Operation

6.2.5.3 FLOAT CHARGE

The battery charger DC voltage is lowered to the configured f loat voltage .

Float Charge is used to provide a small amount of current to the battery, to overcome internal losses and keep the battery at it’s 100% charged state. The battery can be left in this mode indefinitely.

6.2.5.4 STORAGE

When configured to use a four stage charging profile, a time limited storage charge is periodically entered ( storage timer ) to maintain the battery charge at optimum levels. This occurs at the level of the storage voltage . This is adjustable using the DSE Configuration Suite PC Software.

When the storage timer expires, the charger re-enters the Absorption mode.

Additionally, this is used as an ‘Automatic Boost’ facility, to periodically attempt to remove sulfation from the battery plates.

6.2.5.5 CHARGING TIME

Charge time is often of little consequence when the battery is used in a standby operation. An example of this is when the battery is used to supply the starting system of a diesel generator. During normal operation, the battery is at full capacity and the battery charger is used to maintain the float voltage of the battery. The battery is only drained when the generator is called to start. As the generator has a DC charging alternator fitted, the battery is quickly recharged when the generator is running. Should the generator stop before the battery is fully recharged, the DSE9400 MKII Series battery charger will continue to recharge the battery until it is fully charged.

Typically a battery will charge from flat to 80% capacity in 16hrs when when charged at C/10.

For example charging a 50Ah battery for 16hrs at 5A will charge the battery to 80% of its full capacity.

Remember to take into account any other standing load such as control panel requirements when calculating how much power is ‘left’ to charge the battery.

6.2.5.6 MANUAL BOOST

NOTE: The Digital Input must be configured to Manual Boost to provide this function.

For further details, you are referred to DSE Publication: 057-159 DSE9400 Series Battery

Charger Configuration Suite Manual.

Manual boost will place the charger into Bulk Charge mode, charging at the level of the boost voltage .

A typical use of manual boost is with Lead Acid type batteries. When the battery is fully charged, placing the charger into boost mode will raise the output voltage. This has the effect of gassing the battery, helping to remove sulfation from the battery plates and helping the cells to equalise in voltage.

6.2.6 TEMPERATURE COMPENSATION

NOTE: For details of Battery Charger Configuration, you are referred to DSE Publication:

057-159 DSE9400 Series Battery Charger Configuration Suite Manual.

If temperature compensation is enabled through configuration, and remote temperature sensor is connected, the output voltage automatically varies by a configureable voltage per cell for each 1°C deviation from 20°C, within the range of -20°C to 60°C. Increasing temperature gives decreasing output voltage and increasing temperatures gives increasing output voltage..

The battery temperature is measured by a 2 wire PT1000 sensor placed on the battery itself.

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