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What is the discharge cut-off voltage for lithium-ion batteries?
The working voltage of a typical lithium battery is 3.7V, with a termination voltage of 3.2V; The working voltage of lithium iron phosphate battery is 3.26V, and the termination voltage is 2.5V. The voltage at which a lithium-ion battery is fully charged is referred to as the termination charging voltage in the industry. According to battery industry standards, this voltage is approximately 1.2 times the rated voltage value. The termination charging voltage for a 3.6V mobile phone battery is 4.2-4.3V.
The discharge termination voltage of iron lithium-ion batteries is basically around 3.3, and the discharge protection voltage setting of the internal protection board of lithium-ion batteries is basically 2.5V. How much is the appropriate discharge termination voltage for this lithium-ion battery? According to the termination voltage of 2.5 on the protection board, it will not affect the capacity performance of the lithium-ion battery and will not damage it.
With the continuous development of the lithium-ion battery industry, more and more devices are using lithium-ion batteries. In addition to the common consumer polymer lithium-ion batteries in the market, the market share of ternary lithium-ion batteries and iron phosphate lithium-ion batteries is relatively high. Generally speaking, the voltage of a ternary lithium-ion battery cell is 3.7 volts, and the voltage of a lithium iron phosphate battery cell is 3.2 volts. For a small portion of lithium-ion battery packs, the price of a lithium iron phosphate battery may be lower than that of a ternary lithium-ion battery, but for high-capacity lithium-ion battery packs, the cost-effectiveness of a ternary lithium-ion battery is still higher.
However, at present, the market price of lithium-ion batteries is relatively chaotic, with prices ranging from high to low, so everyone should pay attention when choosing products. A friend asked, what is the cut-off voltage of lithium-ion batteries. As for the cut-off voltage of lithium-ion batteries, it depends on the specific capacity, and the cut-off voltage price of lithium-ion batteries varies with different specifications and parameters.
When a lithium-ion battery is discharged, its working voltage always changes over time. The curve drawn by plotting the working voltage of the battery as the y-axis, the discharge time, capacity, state of charge (SOC), or depth of discharge (DOD) as the x-axis is called the discharge curve. To understand the discharge characteristic curve of a battery, one must first understand the voltage of the battery from a theoretical perspective.
The internal resistance of lithium-ion batteries increases with the increase of battery discharge current, which is mainly due to the fact that a large discharge current increases the polarization trend of the battery, and the larger the discharge current, the more obvious the polarization trend.

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