“Battery Discharge Ratings” for golf car batteries

The industry standard is that 30 minutes of discharge time = 1 normal, 2-person, 18-hole round of golf.Battery Discharge PAge (10)

 

Electric golf car battery professionals use a system to measure how much performance is left in a used golf car battery pack.The system is called Battery Discharge Rating (BDR) and seeks to predict how long a set of used flooded lead-acid batteries will last in normal usage, like playing golf.

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The Battery Discharge Rating (BDR) system simply runs a load test on the whole battery pack under controlled conditions to yield a common reading for how much TIME it takes, in minutes, to run a particular set of batteries from full charge down to the cut-off point. Simple enough.

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The test is run using a relatively expensive discharge machine which puts a controlled load on the battery pack together, and runs a timer to record how long the load is applied from full charge until the pack hits the 1.75V/cell cut-off point.

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We then make the discharge minutes number meaningful by translating the discharge reading into normal, two-person, 18-hole rounds of golf. The industry standard is that 30 minutes of discharge time = 1 normal, 2-person, 18-hole round of golf.

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A normal battery pack will start out at about 70 minutes of discharge time, and gradually improve through the first hundred or so charge-discharge cycles, to a maximum of 105 to 120 minutes. Over time and through hundreds of discharge cycles, the discharge time gradually diminishes until the battery pack will no longer store enough energy to be useful, and must be replaced.
For more information, please contact the golf car professionals at Masek Golf Car Co. 800-800-8987.