Selecting a Battery System

We need diiferent batteries so as to achieve optimal application-specific performance. As we know, each material exhibits a unique set of properties, specific to itself. In selecting the materials for a battery system we want to use materials that emphasize desirable properties, as pertains to the intended application. The major considerations in selecting a battery system are summarized below.

• Battery Type: Primary, secondary,  reserve or fuel cell system.

• Battery Voltage: Nominal or operating voltage, maximum/minimum voltage limits, discharge profile, voltage delay, start-up time.

• Load Current & Profile: Constant current, constant resistance, or constant power; value of load current, constant or variable load current.

• Duty Cycle: Continuous or intermittent, schedule if cycle is intermittent.

• Temperature Requirements: Operational temperature range.

• Service Life: Length of time over which operation is required.

• Physical Requirements: Size, shape, weight limitations.

• Shelf Life: Allowable storage time.

• Charge-Discharge Cycle: Discharge profile and charging efficiency.

• Environmental Conditions: Atmospheric conditions including pressure and humidity, shock, vibration, spin, acceleration environment compatibility.

• Safety & Reliability: Permissible failure rates.

• Maintenance: Ease of battery maintenance and replacement.

• Cost: Initial and operating costs.

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