18650 rechargeable battery lithium 3.7v 3500mah
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18650 rechargeable battery lithium 3.7v 3500mah
18650 rechargeable battery lithium 3.7v 3500mah

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Lithium battery specific energy and specific power

source:Industry News release time:2024-04-13 Hits:     Popular:AG11 battery

  

  The output energy of the battery refers to the electrical work that the battery can make under certain discharge conditions, which is equal to the product of the discharge capacity of the battery and the average working voltage of the battery, and its unit is commonly expressed in watt-hours (Wh).

  There are two types of battery specific energy. One is called weight-specific energy, expressed in watt-hours per kilogram (Wh/kg); The other is called volumetric energy and is expressed in watt-hours per liter (Wh/L). The physical meaning of specific energy is the effective electrical energy of the battery for unit weight or unit volume. It is an important indicator for the comparison of battery performance.

  It must be pointed out that the specific energy of a single battery and a battery pack is not the same. Because there are always connection strips, external containers and inner packaging layers when the battery pack is combined, the specific energy of the battery pack is always less than the specific energy of the single battery.

  The power of the battery refers to the energy that the battery can output per unit time under certain discharge conditions. The units are watts (W), or kilowatts (kW). The power per unit weight or unit volume of the battery is called the specific power of the battery, and it is measured in watts per kilogram (W/kg) or watts per liter (W/L). If the specific power of a battery is larger, it indicates that more energy is given per unit time, per unit weight or per unit volume, that is, the battery can discharge with a larger current. Therefore, the specific power of the battery is also one of the important indicators to evaluate the performance of the battery.


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