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  • Assuming zero manufacturing defects, what are the chief causes of battery failure for a generator start application?

    Assuming zero manufacturing defects, what are the chief causes of battery failure for a generator start application?

    Nov , 22 2021
    Assuming zero manufacturing defects, there are three chief causes of battery failure: Failure to start is the most significant avoidable cause of diesel generator malfunction. Over 80% of failures to start are caused by battery problems. Genset customers invest significant amounts of money purchasing and maintaining generators. Yet the Achilles heel of these large, costly machines is a commodity p...
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  • What type of Battery assessment is suited for GENSET applications?

    What type of Battery assessment is suited for GENSET applications?

    Nov , 27 2021
    Lead-acid battery monitoring technology has matured to the point where the IEEE issued a standard (IEEE 1491) in 2005 to describe the various battery health assessment methods. Most large data centers, for example, spend tens of thousands of dollars for battery monitoring equipment designed to predict whether their UPS batteries will work. Data centers with downtime costs of six figures per minute...
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  • How to implement battery monitoring in a deployable product?

    How to implement battery monitoring in a deployable product?

    Nov , 27 2021
    Standalone ohmic battery monitoring systems designed for data center application are not suited for a genset environment. Although ohmic monitors work, they are expensive (estimated at $2,000 for a 24-volt system), time-consuming to install, and require trained personnel to interpret their data output. To achieve widespread adoption in the genset market any battery monitoring technology will need ...
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  • What are the recharge cycles phases of a Lead acid battery?

    What are the recharge cycles phases of a Lead acid battery?

    Nov , 27 2021
    The fastest generally accepted way to charge a conventional (lead‐acid or NiCd) battery is with a constant voltage, a current limited battery charger that is capable of both “boost” and “float” output voltages. “Boost” charging applies a higher than normal voltage to the battery early in the charge cycle to charge the battery as quickly as possible. Later, once the battery is charged, charging vol...
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  • What is the right duration of Phase 2 of a charging cycle?

    What is the right duration of Phase 2 of a charging cycle?

    Nov , 27 2021
    The duration of Phase 1 is determined by the battery’s depth of discharge, the ratio of charger ampacity to battery capacity, and whether there are parasitic DC loads connected to the system. Although the duration of Phase 1 does vary, we are not concerned with this variation since, once the battery capacity, charger output, and DC loads are installed, we have no means to change the duration of Ph...
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  • Shortcomings of automatic boost timers (Method C) and current‐sensing automatic systems (Method D)

    Shortcomings of automatic boost timers (Method C) and current‐sensing automatic systems (Method D)

    Nov , 27 2021
    In the automatic timer control scheme, the duration of the boost charger is pre‐programmed into the charger’s control system. Chargers equipped with automatic boost timers may, under very specific circumstances, provide just the right duration of boost charging. Under all other circumstances, however, such as a different depth of discharge, or when the connected DC load changes, the pre‐programmed...
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  • What is Dynamic Boost and how does it works?

    What is Dynamic Boost and how does it works?

    Dec , 03 2021
    As with the current‐controlled automatic boost system, Dynamic Boost includes no pre‐programmed boost timer. Unlike the current‐controlled automatic boost system, however, Dynamic Boost automatically adjusts boost duration to take into account differing parasitic DC loads and other variables discussed above. The principle behind Dynamic Boost is simple and straightforward. Refer back to Figure 1. ...
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  • Why Boost Charging is Necessary?

    Why Boost Charging is Necessary?

    Dec , 06 2021
    Boost charging is a very necessary activity during the operation of a VRLA battery in their life time. In this article we are going to discuss about the necessity of Boost charging in details. The following example helps illustrate two facts about reducing battery recharge time: Cutting recharge time in half is more complex than using a charger that delivers twice as many amperes. Multi‐rate charg...
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  • Why flooded SLI batteries in GENSET applications fail sooner and more suddenly than in vehicle applications?

    Why flooded SLI batteries in GENSET applications fail sooner and more suddenly than in vehicle applications?

    Dec , 06 2021
    Even though the batteries perform the identical job of delivering high-rates of current to crank internal combustion engines, the “use model” of batteries employed in gensets is different in one key respect from those employed in vehicles. Batteries used on gensets are charged around the clock, whereas vehicle batteries are charged only intermittently. Flooded SLI batteries used in genset applicat...
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  • Why flooded SLI batteries in GENSET applications fail sooner and more suddenly than in vehicle applications?

    Why flooded SLI batteries in GENSET applications fail sooner and more suddenly than in vehicle applications?

    Dec , 06 2021
    Continuous float charging flooded SLI batteries accelerates the deterioration of polyethylene plate separators to a life shorter than that which battery designers intended. When subjected to continuous float charging, the dominant and earliest failure mode tends to be premature failure of the polyethylene separator. Separator failure typically results in short circuits that prevent the battery fro...
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  • How a new intermittent charging algorithm addresses premature SLI battery failure?

    How a new intermittent charging algorithm addresses premature SLI battery failure?

    Dec , 06 2021
    A new charging algorithm addresses the problems of short genset battery life and sudden battery failure discussed above, while meeting the regulatory needs to deliver non-stop DC power to critical applications. The principle is simple and straightforward. Emulate the beneficial intermittent vehicle charging regime for which SLI batteries were originally designed, but continue charger operation to ...
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  • Suitability of competing charging solutions in Genset applications

    Suitability of competing charging solutions in Genset applications

    Dec , 10 2021
    Instead of polyethylene, AGM type SLI batteries typically employ separators made of fiberglass. Because fiberglass does not oxidize like organic polyethylene, float charging at the battery manufacturer’s recommended float voltage is not inherently harmful to AGM type SLI batteries. Therefore, the intermittent charging method discussed is unlikely to increase the life of AGM type batteries. The dif...
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