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  • How to do the SOC-OCV test for Lithium batteries?

    How to do the SOC-OCV test for Lithium batteries?

    Apr , 06 2022
    OCV is very important for SOC estimation. It is a function of cell SOC and temperature. There are two methods to measure the OCV, namely coulomb titration and voltage relaxation. The former discharges and charges the cell with the same low current while measuring the terminal voltage. The OCV is defined as the average value of the charge and the discharge terminal voltage. The latter determines th...
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  • Some FAQ about the Lithium batteries for UPS

    Some FAQ about the Lithium batteries for UPS

    Apr , 06 2022
    What are the primary benefits of switching to lithium based UPS batteries? The most common reason cited is the significantly longer service life. Lithium also provides a greater cycle life (the number of charge/discharge cycles ranges from extends into the thousands, versus approximately 500-600 for VRLA batteries), as well as a longer warranty. Furthermore, the lighter weight and smaller footprin...
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  • Battery charging tutorial-Part 1

    Battery charging tutorial-Part 1

    Apr , 18 2022
    Current battery charging technology relies on microprocessors (computer chips) to recharge; using 3 stages (or 2 or 4 stages) regulated charging. These are the "smart chargers", and quality units generally are not found in discount stores. The three stages or steps in lead/acid battery charging are bulk, absorption, and float. Qualification or equalization is sometimes considered another stage. A ...
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  • Battery charging tutorial-Part 2

    Battery charging tutorial-Part 2

    Apr , 18 2022
    Equalization Equalization is essentially a controlled over charge. Some charger manufacturers call the peak voltage the charger attains at the end of the BULK mode (absorption voltage) an equalization voltage, but technically it's not. Higher capacity wet (flooded) batteries sometimes benefit from this procedure , particularly the physically tall batteries. The electrolyte in a wet battery can str...
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  • Uninterruptible Power System-Use of Inverters & Chargers

    Uninterruptible Power System-Use of Inverters & Chargers

    May , 09 2022
    If you already have a pretty good idea about the available methods for converting ac power to dc power, an inverter covers the other direction: changing dc into ac. Normally, when we speak of an inverter, we mean a device that generates line frequency power from a dc source, to power conventional ac-powered loads such as a personal computer, or industrial controls and instrumentation. A UPS integr...
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  • DC-DC Converters-A suitable alternative to battery chargers

    DC-DC Converters-A suitable alternative to battery chargers

    May , 09 2022
    What if you had all the power you wanted or needed at 125 Vdc, but your site manager suddenly handed you a requirement for 24 Vdc to run some communication gear? You might tell him to buy a 24 V battery and a 24 V battery charger. But, these elements come with costs: initial, maintenance, and probable future battery replacement. There is another way: for approximately the same cost as the battery ...
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  • How to do Battery charger Sizing?

    How to do Battery charger Sizing?

    May , 09 2022
    In this article we will discuss the La Marche method for sizing a battery charger. There are a few pieces of information that must be gathered before the charger size can be calculated. The required information is as follows: – What is the maximum load in amps? – What is the battery backup time needed? – What is the required recharge time? – What is the battery type (Lead acid or Ni-Cad) and the n...
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  • Battery charger options (part-1)

    Battery charger options (part-1)

    May , 16 2022
    In this series of articles we will discuss the options you can have in your battery charger. You can check out these options for choosing your desired battery charging solution. Special Ground Bus This is an appropriately sized ground bus bar mounted inside the battery charger to allow customers to tie ground connections inside the charger to the external system ground. The ground bus bar allows f...
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  • Battery charger options (part-2)

    Battery charger options (part-2)

    May , 16 2022
    In this series of articles we will discuss the options you can have in your battery charger. You can check out these options for choosing your desired battery charger solution. Alarm and Auxiliary Switches Breakers can be equipped with either an Alarm Switch or an Auxiliary Switch. They allow the customer to remotely monitor the status of the breaker telling them if it is tripped or open/closed. T...
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  • Battery charger options (part-3)

    Battery charger options (part-3)

    May , 16 2022
    In this series of articles we will discuss the options you can have in your battery charger. You can check out these options for choosing your desired battery charger solution. Charge Dividers Our charge divider option adds series diodes to the output of our charger to isolate multiple banks of batteries. The battery banks, in effect, do not see each other, allowing each bank to be charged complet...
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  • Battery charger options (part-4)

    Battery charger options (part-4)

    May , 23 2022
    In this series of articles we will discuss the options you can have in your battery charger. You can check out these options for choosing your desired battery charger solution. Reverse Polarity Protection and LED This circuit protects against someone accidently reversing the battery terminal connections on the charger (i.e. connecting the battery positive to the charger negative or vice versa). Th...
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  • Battery charger options (part-5)

    Battery charger options (part-5)

    May , 23 2022
    In this series of articles we will discuss the options you can have in your battery charger. You can check out these options for choosing your desired battery charger solution. Zero Center Ammeter with Battery and Load Terminals DC Ammeter, which reads both charge and discharge current to the battery. Two sets of output terminals are provided, one for the load connection and one for the battery co...
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