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Author ：Iflowpower – Portable Power Station Supplier
How to calculate the capacity of the polymer battery into the 21st century, with the rapid development of the industry, everyone knows that the polymer battery is a high-quality product, and people's research has become more and more deeper. When it comes to research, one of the problems we think is how to calculate the capacity of polymer batteries? Studies have found that the first method is to monitor the open circuit voltage of the battery to obtain the remaining capacity. This is because there is a certain relationship between the battery-side voltage and the remaining capacity, and the remaining capacity can be estimated by measuring the battery end voltage.
The limitations of this approach are: 1) Different manufacturers of battery open circuits and capacity of different manufacturers. 2) Only more accurate results can only be obtained by measuring the open circuit voltage during the battery-free. However, most applications must understand the remaining capacity of the battery at work, and the pressure drop in the load current will affect the measurement accuracy of the open circuit voltage.
The disparation of the battery is very large, and this dispersion will increase with the battery life, so it is difficult to compensate for errors caused by the pressure drop. In summary, the open circuit voltage is estimated to estimate the remaining capacity of the battery in actual application, which can only supply a rough reference value. Another widespread use is to estimate the remaining capacity of the battery by measuring the net charge of inflow / outflow battery.
In this approach, the total current of the inflow / exiting the battery is integrated, and the net charge is the remaining capacity. This approach can achieve satisfactory precision, so a wide range of applications in high-end applications such as laptops. There is a general algorithm that the battery capacity of the lithium ion battery industry is: material thickness * width * length capacity * coefficient (0.
1 ~ 0.12), the size of the coefficient depends on the capacity of the size, the ability, the larger, the greater, the smaller ability The smaller the coefficient, the algorithm can only initially react the lithium-ion battery capacity, and the actual ability depends on a particular product, the actuarial capacity is more accurate. The actual capacity calculation of the polymer battery is more complicated.
There is currently no unified standard, and it is necessary to calculate according to its own actual situation, such as positive and negative electrode materials.
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