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Auto Channel — Issue 59 July 2023

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ISSUE 59 JULY 2023

THE VOICE OF THE NEW ZEALAND AUTOMOTIVE INDUSTRY

DRIVEN BY PASSION FOR 100 YEARS

Breaking down the battery hierarchy CALCIUM, EFB, AND AGM BATTERIES ALL HAVE THEIR PLACE IN THE MODERN AUTOMOTIVE ECOSYSTEM. HERE WE TAKE A LOOK AT THEIR SPECIFIC CHARACTERISTICS AND HOW THE KOBA BRAND DELIVERS ACROSS ALL THREE TYPES

T

he complex nature of the automotive industry is known to all. The aftermarket industry is just as complicated, leaving customers overwhelmed by the sheer number of options available. When it comes to the battery category alone, there are many types to choose from depending on power requirements, application, budget, and lifestyle needs. The three types of automotive batteries predominately used today are calcium (maintenance free), EFB (Enhanced Flooded Battery) and AGM (Absorbent Glass Mat) batteries. The notable differences between each type of battery are best explained using the battery hierarchy. Calcium batteries are positioned at the base of the hierarchy. These are the most commonly used batteries among the three battery types. Calcium batteries are lead acid batteries which

have small amounts of calcium added to both the positive and negative grids to improve durability and reduce water consumption. Calcium batteries are also maintenance free because the water in the electrolyte does not evaporate and therefore they do not require topping up with water. Despite these advantages, calcium batteries require charging if not used regularly to prevent sulfation, which will reduce the service life of a battery. In the middle of the battery hierarchy are the EFBs. These are relatively new to the market as they were developed specifically to cater to modern Idle Stop Start (ISS) vehicle requirements. They are based on the calcium battery design which means that they can be manufactured in a calcium battery factory using the existing equipment. Enhancements to the base design

results in increased charge acceptance and cranking power, as well as the ability to constantly operate at partial State of Charge. Although EFBs are a step up from calcium batteries, they are considered an entry level option for vehicles that use ISS technology. AGM batteries are the premium choice for highend and advanced ISS vehicles with recuperative braking. This is why they are positioned at the top of the hierarchy. AGM batteries are different to calcium batteries in a number of ways, however the chemical reaction is the same. AGM batteries use a compressible glass mat to separate the positive and negative plates in the battery. This mat also holds the electrolyte required for the battery to function. During assembly, the plate and mat assembly is compressed

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Auto Channel — Issue 59 July 2023 by Via Media - Issuu