How to Test Battery Discharge Capacity

+ ATE DC Electronic Load

Measure Battery Discharge Capacity

Testing battery discharge capacity requires applying a controlled current load while monitoring how the battery voltage changes throughout the discharge cycle. The setup includes a programmable DC electronic load configured for constant-current operation and voltage measurement to track the battery terminal voltage over time. Measurements are performed at defined discharge currents while the battery voltage is continuously monitored. The discharge continues until the battery reaches its specified low-voltage cutoff, preventing the test from extending beyond the intended operating range.

The capacity measurement evaluates the amount of charge delivered by the battery during the controlled discharge period. Battery capacity is determined from the discharge current and elapsed discharge time, while the recorded voltage profile shows how the terminal voltage changes as stored energy is removed. Repeating the measurement at different constant-current levels provides discharge curves that show how usable capacity and run time vary with discharge rate. Dynamic current profiles can also reproduce changing device loads when evaluating battery behavior under variable operating conditions.

Battery Discharge Capacity Test Solution

Testing battery discharge capacity requires a programmable electronic load that can draw controlled current while monitoring battery voltage throughout the discharge cycle. The solution uses a Keysight ATE DC electronic load to apply repeatable discharge conditions and measure voltage and current as energy is removed from the battery. Constant-current loading establishes a defined discharge rate, while voltage monitoring tracks the battery discharge profile and identifies when the specified cutoff condition is reached. Different current levels can be applied to characterize how discharge rate affects usable capacity and operating time. Programmable load profiles can also reproduce changing current demand for more dynamic discharge testing. This approach provides repeatable battery discharge measurements and supports automated characterization across defined current levels and operating conditions.

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