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Author ：Iflowpower – Portable Power Station Supplier
With the development of lithium-ion batteries, the direction of large-capacity lithium-ion batteries is the important concern factor for battery consumption market. In order to meet the needs of consumers, many lithium-ion batteries, plus the industry competition, the capacity of the large-capacity lithium-ion battery is serious, and many battery manufacturers have a gap with the capacity of the capacity of the advertising, there is Big small, related to price level. So how do you test the capacity of a large-capacity lithium-ion battery? If the virtual standard capacity, how much is the volume of the virtual standard? Let's take a look at it.
1. Measure the tool for large-capacity lithium-ion batteries: Metering rules quickly estimate the capacity of lithium ion battery, often used estimation formula (estimated only): This is calculated on the battery cell, does not contain battery housing. Battery capacity = thickness * Width * length * k (K unit is MAH / mm3) k value range (0.
07 ~ 0.11), K value depends on the size of the capacity, the larger the capacity, the larger the K value, the smaller the capacity, the smaller the capacity The smaller the K value (you can understand that the size is larger, the greater the k value). Actual calculations, you can default to 0.
1. For example, 103450LP (thickness 10mm, width 34mm, length 50mm), calculation capacity = 10 * 34 * 50 * 0.1 = 1700, the actual capacity is above 1800mAh; such as 603048LP (thickness 6mm, width 30mm, length 48mm), calculation capacity = 6 * 30 * 48 * 0.
1 = 864, the actual capacity can be 900mAh. 2, prepare a current standing lithium-ion battery capacity = voltage ¡Á discharge current ¡Á discharge time This is believed that many friends who have learned physics know how to count?. 3, a rated current discharge electric device, such as the light pen is discharged directly, until the light is dark, record the time t, the large-capacity lithium ion battery can be considered C: c = UIT lithium ion battery open circuit voltage and The corresponding relationship between the battery capacity is generally, the percentage is the remaining capacity of the battery, the right side is the open circuit voltage (OCV) of the battery.
100% - 4.20V90% - 4.06V80% - 3.
98V70% - 3.92V60% -3.87V50% -3.
82V40% - 3.79V30% -3.77V20% -3.
74V10% - 3.68V5% - 3.45V0% -3.
00V This is a sharing related to friends who do battery cell processing for many years Experience, from the data, you can also use the universal voltage meter to do a large-capacity lithium-ion battery, just look at the power of the remaining capacity of the lithium-ion battery, then depends on the voltage, do it, it is probably the judgmen.
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