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Voltage Range and Volatge of Lithium Batteries

2022-03-18

Lithium battery cells are mainly divided into two categories: lithium iron phosphate cells and lithium polymer cells.

Due to the different characteristics of the chemical raw materials used in their manufacture, their battery voltage is also different. Specific conditions are as follows.

(1) the full charge voltage of lithium polymer batteries are 4.2 V, 4.35 V, 4.4 V, and even 4.45 V. Generally speaking, more than 4.35 V is a high-voltage battery, energy density and production technology requirements are relatively high, the price is also relatively high. At present, consumer electronic products in the market are basically using 4.2V full charge voltage battery

Discharge termination voltage (stop discharge voltage) depends on the manufacturer's regulations, generally higher than 3.2V, the technical threshold is relatively low, the popularity of applications is relatively high.
(2) lithium iron phosphate battery voltage range of 2.0 ~ 3.65V

The full voltage of a single lithium iron phosphate battery is 3.65 V, the discharge termination voltage is 2.0 V. Generally, battery manufacturers will set the termination voltage higher than 2.0 V in order to protect the life of the cell. due to the characteristics of the battery chemistry, the energy density of lithium iron batteries is lower than that of lithium polymer batteries, but the safety performance is higher and the price is lower. Therefore, many of the batteries used in new energy vehicles are lithium iron phosphate batteries.

(3) lithium ion cobalt oxide battery, voltage range 2.6 to 4.2V, nominal voltage 3.6V.

Lithium cobalt oxide cells have a full charge voltage of 4.2V, a final discharge voltage of 2.6V, and a nominal voltage of 3.6V.

(4) The voltage range of NiMH NiCd battery is 1.0~1.4V, and the nominal voltage is 1.2V.

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