Quote:
Originally Posted by littleCedar
<stuff snipped by Alan for brevity>
As an example: going by the chart in the link, the same or similar as several others I have found, if a battery reads 12.1, and is at "50% of charge", does that mean it will discharge under use in 50% fewer holes on the golf course, or does that mean that 50% of its useful life is over, but it will still do as many holes per charge, or some combination?
It certainly does not sound OK to be at 50% of charge when it is "fully charged".
From the several tutorials online, it is fairly obvious that the closer a reading is to 12.0, the nearer a battery is to end-o-life. So, what about three reading 12.4, and one reading 12.1, or three reading 12.1, or four reading 12.3? Will multiple low-reading batteries reduce holes per charge?
etc., etc., etc.
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50% state of charge is an indicator of how much energy is left in the battery for this charge cycle, i.e., how many holes it will go. It is not an indicator that it has 50% useful life left. In fact a battery that can only be charged to 50% SOC is likely
nearing end of life. IMO that is very low.
Here is a graph I did some time ago in which I tracked the pack voltage for two separate rides. All packs will have their own line if you were to chart them during usage as I did. The cart charted below had a good pack and could go quite far as it has 8-6v batteries.
Based on my chart the cart looks like it could theoretically go about 75-80 miles before causing great harm to the pack. Now look at the same line but start at 50% SOC. Looks like I could go 32-35 miles if I started with an SOC of 50%.
