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 ion powerwall.Structure of lithium batteries

release time:2023-11-23 Hits:     Popular:AG11 battery

  

  Lithium batteries typically come in two shapes: cylindrical and square. The interior of the battery adopts a spiral wound structure, which is separated by a very fine and highly permeable polyethylene film isolation material between the positive and negative electrodes. The positive electrode includes lithium cobalt oxide (or nickel cobalt lithium manganese oxide, lithium manganese oxide, lithium ferrous phosphate, etc.)

  A current collector composed of aluminum foil. The negative electrode is composed of a current collector composed of graphitized carbon material and copper foil. The battery is filled with an organic electrolyte solution. In addition, it is equipped with safety valves and PTC components (some cylindrical use) to protect the battery from damage in abnormal states and output short circuits.

  The voltage of a single lithium battery is 3.7V (3.2V for the positive electrode of lithium ferrous phosphate), and the battery capacity cannot be infinitely large. Therefore, single lithium batteries are often treated in series or parallel to meet the requirements of different occasions.


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