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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Structure and working principle of lithium iron phosphate battery

release time:2022-12-07 Hits:     Popular:AG11 battery

Lithium Battery GN12-400

  1. Structure of lithium iron phosphate battery

  As shown in the figure, on the left is the olivine LiFePO4 as the positive pole of the battery, which is connected to the positive pole of the battery by aluminum foil, and in the middle is a polymer diaphragm, which separates the positive pole from the negative pole. However, lithium ion Li+can pass through but electron e cannot. On the right is the negative pole of the battery composed of carbon (graphite), which is connected to the negative pole of the battery by copper foil.

  2. Working principle of lithium iron phosphate battery

  When the LiFePO4 battery is charged, the lithium ion Li+in the positive electrode migrates to the negative electrode through the polymer membrane; In the discharge process, Li+in the negative electrode migrates to the positive electrode through the diaphragm. Lithium ion battery is named because lithium ion moves back and forth during charging and discharging.

  When selecting the charger for charging and discharging, it is better to use the charger with correct charging termination device to avoid shortening the service life of lithium iron phosphate battery due to overcharging. Generally speaking, slow charging can prolong the service life of the battery more than fast charging. Depth of discharge The depth of discharge is the main factor affecting the life of lithium iron phosphate battery. The higher the depth of discharge, the shorter the life of lithium iron phosphate battery. In other words, as long as the discharge depth is reduced, the service life of lithium iron phosphate lithium battery can be greatly extended. Therefore, we should avoid over discharging the lithium battery UPS to extremely low voltage. If the lithium iron phosphate battery is used at high temperature for a long time in the working environment, its electrode activity will decline and its service life will be shortened. Therefore, it is necessary to prolong the service life of the lithium iron phosphate battery to keep it at a suitable operating temperature as far as possible


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