“The performance data given in comparisons between lithium-ion and flooded lead-acid batteries are often done with a single cell,” said McDonagh in his article. Driving range directly affects depth of discharge (DOD) and as McDonagh pointed out, comparisons are often done in laboratory conditions. Translated to the actual driving range of a typical golf car, Wehmeyer suggests that the lithium battery would have 25 percent of the driving range of the lead acid battery. The lithium battery has only 25 percent of the energy of the lead acid battery and can cost up to 50 percent more,” says Wehmeyer. “Even without the thermal and battery management safety features, the cost of the lithium-ion pack averages out to $0.42 – 0.52 per watt-hr vs $0.07 – 0.10 per watt-hr for a lead-acid pack. “When you compare a 240 Ah – 48-volt (11,520 Watt-hr) lead acid battery and a 60 Ah – 48-volt (2880 Watt-hr) lithium ion battery, the lithium-ion battery has a definite weight savings of 422 lbs. Battery Manufacturing, says that there’s a discrepancy. “Factor in the connectors, spacing in a battery pack, the control and safety equipment, battery management system, fire control, and cooling equipment which are required for the safe operation of larger lithium-ion batteries, and the net result is that an installed working lithium-ion battery will have a working capacity less than one-half its nameplate value.”Īpplying this to a typical 48-volt golf car, Fred Wehmeyer, Senior VP of Engineering for U.S. “Energy densities of current lithium-ion battery chemistries are given at around three to five times the gravimetric and volumetric energy density of lead-acid at the cell level, which in part, explains why the older technology has been all but ignored,” said McDonagh. Mike McDonagh points out the half-truths put out by the lithium industry. In a recent article in the Summer 2017 edition of Battery and Energy Storage Technology Magazine, technical editor Dr. According to battery technology publications and many battery manufacturers, however, these comparisons leave out critical information for any golf course management team to make a proper comparison. Those anxious to make the conversion have put out information from the lithium industry, showcasing the cost comparisons and the advancements this technology brings. With the success of Lithium-ion batteries in many devices and now in vehicles like Tesla cars, many have looked into what Lithium can do to reduce costs for the golf course market. For decades, deep-cycle flooded lead-acid batteries have been the most cost effective means to power electric golf cars.
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