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  • What are the differences among lithium batteries?

    What are the differences among lithium batteries?

    Apr , 06 2022
    Are all the lithium batteries same? No! In fact there are a group of related family chemistries. The battery industry highlights six common variants along with the chemistry characteristic details of those most applicable for your application. Below the 6 common types of lithium ion battery are shown in the table: Chemistry Lithium Cobalt Oxide Lithium Manganese Oxide Lithium Nickel Manganese Lith...
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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 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-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-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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  • High Frequency / High Ripple Resonant Chargers: Good or Bad? (part-2)

    High Frequency / High Ripple Resonant Chargers: Good or Bad? (part-2)

    Jun , 13 2022
    Battery charging is a complex electrochemical process, in which the discharged electric energy is replenished from the electric power grid. This is accomplished using a battery charger, which is an electrical/electronic device that converts the incoming AC line voltage into a regulated DC voltage to meet the charging needs of the respective battery. In a series of articles we are going to explain ...
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  • What are some key practices for a Fast or Opportunity charge operation?

    What are some key practices for a Fast or Opportunity charge operation?

    Jun , 20 2022
    What are the operational implications of charging at a higher rate? Initial Cost: Initial charger investments may cost up to 5 times more than a conventional charger operation, especially if the charging system utilizes a dedicated charger for every battery. Infrastructure Change: Once committed to the Fast or Opportunity charge process, it can be very difficult to transition back to Conventional ...
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  • Explore and analyze the thermal power of Li- ion cells and battery packs (part-1)

    Explore and analyze the thermal power of Li- ion cells and battery packs (part-1)

    Jul , 04 2022
    Temperature is very important for lithium- ion batteries. Low temperature will reduce the electrical performance of lithium- ion batteries (capacity, rate performance), but it can improve the storage life of lithium- ion batteries. High temperature can improve electrical performance (capacity, rate performance), but It will reduce the stability of the electrode/electrolyte interface and cause a ra...
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  • Explore and analyze the thermal power of Li- ion cells and battery packs (part-2)

    Explore and analyze the thermal power of Li- ion cells and battery packs (part-2)

    Jul , 04 2022
    In order to ensure the consistency of the ambient temperature, an incubator is used for precise temperature control, the battery charging and discharging equipment adopts the DigatronBTS-600 equipment, and the Agilent 34970A equipment is used to collect the temperature information of the battery. When the above-mentioned battery is at an ambient temperature of 27°C, the temperature change curve of...
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  • Explore and analyze the thermal power of Li- ion cells and battery packs (part-3)

    Explore and analyze the thermal power of Li- ion cells and battery packs (part-3)

    Jul , 04 2022
    1.       Influence of ambient temperature: The following figure shows the battery temperature rise curve (average temperature of 5 sampling points) during 1C charge and discharge process of 55Ah battery at ambient temperatures of 20°C, 27°C and 40°C. From the figure, we can It can be seen that the charging time of the battery at 20°C is 74min and the discharge time is...
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  • Explore and analyze the thermal power of Li- ion cells and battery packs (part-4)

    Explore and analyze the thermal power of Li- ion cells and battery packs (part-4)

    Jul , 11 2022
    Continuing from last week’s article, this week we are going to discuss other parameters. 3. Influence of charge and discharge rate The charge and discharge rate characterizes the charge and discharge current of the lithium- ion battery. Therefore, the charge and discharge rate must have a very significant impact on the heat generation power of the lithium-ion battery. , the final temperature and t...
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