The lithium battery discharge curve is a curve in which the capacity of a lithium battery changes with the change of the discharge current at different discharge rates. Specifically, its discharge curve shows a gradually declining characteristic when a lithium battery is operated at a lower discharge rate (such as C/2, C/3, C/5, C/10, etc.).
Polarization curves Battery discharge curves are based on battery polarization that occurs during discharge. The amount of energy that a battery can supply, corresponding to the area under the discharge curve, is strongly related to operating conditions such as the C-rate and operating temperature.
The lithium battery charging curve illustrates how the battery’s voltage and current change during the charging process. Typically, it consists of several distinct phases: Constant Current (CC) Phase: In this initial phase, the charger applies a constant current to the battery until it reaches a predetermined voltage threshold.
It is usually expressed in milliamp-hours (mAh) or ampere-hours (Ah). By integrating the lithium battery charge curve and discharge curve, the actual capacity of the lithium battery can be calculated. At the same time, multiple charge and discharge cycle tests can also be performed to observe the attenuation of capacity.
Metaphorical Explanation Think of boiling water: When you turn up the heat on a stove, water heats up faster. Similarly, at higher discharge rates, the battery heats up more quickly. The temperature rise curve captures this heating process, acting like a thermometer for the battery’s performance.
It can intuitively reflect the voltage and current changes of the battery during charging and discharging. Information on critical parameters such as battery capacity, internal resistance, and efficiency can be obtained by analyzing the discharge curve and charging curve of lithium batteries.
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The charge-discharge curve refers to the curve of the battery''s voltage, current, capacity, etc. changing over time during the charging and discharging process of the battery. The information …
The lithium battery discharge curve is a curve in which the capacity of a lithium battery changes with the change of the discharge current at different discharge rates. Specifically, its discharge curve shows a gradually …
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