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Common parameters of rechargeable batteries

Common parameters of rechargeable batteries

Battery capacity represents how much power a battery can store. The number we see on the battery packaging generally refers to the battery capacity identification. Expressed in unit ampere hour or milliampere hour. It is a composite unit consisting of current unit and time unit product, representing the battery's ability to discharge continuously at constant current. A fully charged battery can discharge with 200 mA current for 10 hours, multiplying the current with time, we can get the capacity of this battery is 2000 mA. H. If it is discharged at 400 mA, the time available is 5 hours.


Energy density: The energy capacity contained in a unit volume or weight. For the same power requirement, batteries with high energy density can be smaller in size and lighter in weight.
C current: refers to the amount of current that will discharge the full battery or fill the exhausted battery in an hour. In fact, that is the value of the ampere-hour capacity. For 1800 mA. capacity batteries, the C current is 1800 mA. 2000 mA. The capacity of the battery, C current is 2000 mA.


Open-circuit voltage: Potential difference between the two poles of a battery.
Memory effect: New batteries with fine grain of electrode material can obtain the maximum surface area of the electrode. Because of the use of the battery content crystallization, crystallization formation, grain growth, also known as (passivation), reduces the available electrode area, and the growth of the grain will cause self-discharge increase, reduce battery capacity, performance damage. This is the memory effect. The memory effect is due to the partial charging and discharging incompleteness of the battery.


Self-discharge rate: After charging, the battery will gradually lose its power even if it is not used. The higher the general temperature, the more significant the self-discharge.


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