Industry News

Common parameters of rechargeable batteries

2021-08-21

Battery capacity represents how much power can be stored in the battery, we see the number on the battery packaging generally refers to the battery capacity identifier.  In unit ampere hour or milliampere hour.  It is a compound unit, composed of a unit of current multiplied by a unit of time, and represents the ability of a battery to discharge continuously at a constant current.  A fully charged battery can discharge for 10 hours at a current of 200mA. By multiplying the current by the time, we can obtain that the capacity of the battery is 2000 ma.h.  If it is discharged at 400mA, the available time is 5 hours.  

Energy density: the amount of electric energy contained in a unit volume or unit weight. For the same amount of electricity required, a battery with high energy density can be smaller in volume and lighter in weight.  

C Current: refers to the amount of current that can be charged to a full battery within one hour after it has discharged or is about to be exhausted.  It's just the number of ampere hours of capacity.  1800mA. For a battery with capacity, C current is 1800mA.  2000mA. For a battery with capacity, the C current is 2000mA.  

Open circuit voltage: the potential difference between the two poles of a battery.  

Memory effect: The new battery, the electrode material of the grain fine, can get the maximum electrode surface area.  After the crystallization, the grain size increases, also known as (passivation), which reduces the available electrode area. Moreover, the growing grain size will cause the increase of self-discharge, which reduces the battery capacity and damages the performance.  This is the memory effect.  The memory effect occurs because the battery is partially charged and discharged repeatedly.  

Self-discharge rate: After charging the battery, even in the case of not using, will gradually lose their own power, generally the higher the temperature, self-discharge