How To Test The Power Of Lithium Iron Phosphate Battery?
公開日:2022/04/26 / 最終更新日:2022/04/26
Voltage detection method: That is to say, the facility of the lithium iron phosphate battery is obtained by simply monitoring the voltage of the battery. The battery power and voltage will not be linearly associated, so the detection method just isn’t correct, and the ability measurement accuracy is barely more than 20%. Particularly when the battery energy is lower than 50%, the facility calculation of the cell phone will turn out to be very inaccurate. Due to this fact, the safety of the battery by this methodology could be very restricted.
2. Battery modeling method: This method is to build a data table based mostly on the discharge curve of the lithium battery. The data table will indicate the ability value beneath totally different voltages. This technique can effectively improve the accuracy of the measurement.
Nevertheless, it’s not simple to acquire an accurate knowledge sheet, because the connection between voltage and power also involves elements similar to battery temperature, self-discharge, and aging. Solely by combining many components to make corrections can a more passable electric amount measurement be obtained.
3. Coulomb counter: The coulomb counter is a present test resistor in the optimistic and negative poles of a lithium battery. When a present flows by means of the resistor, Vsense will appear. By testing Vsense, the current flowing by means of the battery will be calculated.
From the above three strategies, it may be seen that the accuracy of the coulomb meter is the best. It might reduce the discharge cut-off voltage of the battery with out damaging the lithium iron phosphate battery, so that the battery capacity can be utilized to the maximum, particularly Concerning low-voltage programs and batteries which were used many times. In addition, it could ship out a warning message of low lithium-ion battery power with greater accuracy to warn customers from dropping knowledge during use.
1. To charge the battery, initially meant to calculate the charge capacity of the battery by testing the battery voltage Vbat;
2. However after the 5V adapter is related, the main management board will output 4.2V Vbat, at the moment the battery energy is already 100%
The parameter that expresses the energy storage size of lithium-ion batteries is vitality density, which is roughly equivalent to the product of voltage and lithium-ion battery capability in value. To be able to effectively enhance the storage capacity of lithium-ion batteries, people usually use the tactic of accelerating battery capability to realize their objectives. However, resulting from the character of the raw supplies used, the capability increase is all the time limited, so rising the voltage worth turns into one other manner to enhance the storage capacity of lithium-ion batteries.
As everyone knows, the nominal voltage of lithium-ion batteries is 3.6V or 3.7V, and the utmost voltage is 4.2V. So, why can’t the voltage of the lithium-ion battery get a higher breakthrough? In spite of everything, this is also determined by the fabric and structural properties of lithium-ion batteries.
The voltage of a lithium-ion battery is set by the electrode potential. Voltage, also called potential distinction or potential distinction, is a physical quantity that weighs the power difference of electric expenses in an electrostatic subject attributable to different potentials. The electrode potential of lithium ion is about 3V, and the voltage of lithium ion batteries varies with different materials. For example, a basic lithium-ion battery has a rated voltage of 3.7V and a full-cost voltage of 4.2V; while a lithium iron phosphate battery has a rated voltage of 3.2V and a full-charge voltage of 3.65V. In other phrases, the potential distinction between the optimistic electrode and the detrimental electrode of a lithium-ion battery in practical use cannot exceed 4.2V, which is a requirement primarily based on materials and use safety.
At present, within the battery market, lithium iron phosphate batteries are used increasingly more extensively. The density of lithium-ion batteries is high, 5 times that of lead-acid batteries. At the same time, the lifespan of lithium-ion batteries is significantly elevated in contrast to guide-acid batteries. The number of charge and discharge of lithium-ion batteries is 1,000 occasions, which can theoretically be used for ten years. Lithium batteries are generally conventionally charged with “two-stage constant current charging”. This technique does not waste electricity, and the charging time is brief, which is useful to prolong the service life of lithium-ion batteries. At the same time, it is way easier to calculate the lithium-ion battery capacity.
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