The nominal voltage of a lithium-ion battery is 3.7 volts per cell.
Understanding Lithium-Ion Battery Voltage
Lithium-ion (Li-ion) batteries are popular for their high energy density. One of their key features is their voltage, which determines the power they can deliver. Here's a breakdown:
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Nominal Voltage: This is the typical or average voltage of a Li-ion cell during normal operation. For Li-ion, it's generally around 3.7V.
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Voltage Range: A fully charged Li-ion cell can reach about 4.2V, and the discharge cut-off voltage is usually around 3.0V. Operating outside this range can damage the battery.
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Battery Packs: To achieve higher voltages, individual Li-ion cells are connected in series. According to the provided reference, by connecting the cells in series, a battery pack can achieve any voltage in 3.7-volt steps.
Example of Voltage in Battery Packs
Let's say you need a 12V battery pack. You would connect multiple 3.7V Li-ion cells in series to achieve the desired voltage.
Key Takeaways
- Voltage per Cell: 3.7V (nominal)
- Flexibility: Cells can be arranged in series to create battery packs of various voltages.
- Energy Density: Lithium-ion batteries have a high energy density.
