300-12-750【PDF 1/2 页】BATTERY CHARGER/DUAL OUT PUT

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PATCO

I NTELI T ENDER

300

The I NTELI T ENDER 300 provides two fully independent

battery chargers, each having the same basic characteristics

described below. Each output is fully floating, so that it can be

connected to the appropriate batteries in any configuration.

Each output is reverse polarity protected and current limited,

so that neither the Model 300 nor the batteries can be

damaged. The Model 300 can simultaneously support two

different batteries. It will behave normally with both outputs

connected to the same battery. If more rapid charging is

needed than one output of the Model 300 can supply, both

outputs can be connected to the same battery without adverse

effects to the batteries or the Model 300. Each output has three

modes of operation:

1. Bulk Charge Mode - Used when the battery has been discharged. This mode replaces 80% of the charge.

2. Absorption Mode - A tapering current, replacing the final 20% of the charge to the battery.

3. Float Mode - This mode maintains the battery’s electrolyte at the ideal specific gravity regardless of the temperature

of the battery. This weatherproofs the battery, eliminating freezing and boil-off. It also prevents plate oxidation and sulfation.

The following two graphs illustrate how these functions are accomplished. The Model 300 actually becomes three unique instruments,

depending on the charge stored and the temperature of the battery. The first curve, Fig.1 , shows the current from the Model 300 as it

brings a 50 Amp Hour battery from full discharge to full charge. The second curve, Fig. 2 , shows the voltage measured at the battery’s

terminals. For the typical Bass rig, two batteries in the range from 50 to 100 Amp Hours are used, usually in series (+ lead of one

battery connected to the - terminal of the next battery.) Because the Model 300 has fully floating outputs, it does not matter which

output is connected to which battery. For each battery, the percent of charge is given in the graph labeled Figure 2.

During the first thirty six hours of the charge cycle, the Model

300 supplies of the battery a constant current of 1.5 Amperes.

As the battery reaches 80% of its capacity, the Model 300

changes to a constant voltage source, providing a tapering

current during the stage of charging that would be generating

increasing amounts of gas if the constant current were still

applied. Once the current to the battery reaches a pre-

programmed value, compensated for temperature, the Model

300 changes to its final mode of operation, that of a float

charger.

FIGURE 1

The management of the current flowing to the battery during

this process is critical if the process of energy storage is to be

optimized. During the Absorption Mode, the current tapers,

generating a slower increase in voltage for the same time

interval. Finally, when the battery is fully charged, the current

ceases for a brief time and the voltage falls to the Float

Voltage. These critical break points, ending Bulk Charge,

FIGURE 2

ending Absorption Charge, and Float Voltage are all

temperature compensated, permitting precise programming of

these voltages, hence maximum charge stored.

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