14500 lithium battery, 14500 lithium battery manufacturer

The 14500 lithium battery is a lithium battery with a diameter of 14mm and a height of 50mm. It is divided into a lithium iron phosphate battery and a lithium cobalt acid battery according to the core material. Lithium cobalt acid battery voltage 3.7 V, lithium iron phosphate battery voltage 3.2 V. Since its exterior size is the same as that of the AA5 # battery, a 14500 lithium battery and a seat bucket can be used instead of two AA batteries. Compared with nickel-metal hydride charging batteries, lithium batteries have the advantages of light weight, low self-discharge, and superior discharge performance. Therefore, they are widely used by photography enthusiasts in digital cameras and electronic cigarettes instead of nickel-metal hydride charging batteries. What's the endurance? It should be okay, depending on what you're using and how often, how strong, and how long you're using it, with a nominal capacity of 1600mAh.

Dongguan big company, the industry leader 14500 lithium battery manufacturers, according to the needs of customers can customize 14500 lithium battery packs of various specifications. Here are three common questions for 14500 lithium batteries:

1. 14500 Purchase Problem

Since the voltage of the lithium battery is (2.5 V -- 3.7 V) over discharge or overcharge will damage the battery, the battery with a protective plate can be protected. I do not think that because the 14500 battery with a protective plate is a few MM higher than the ordinary No. 5 pool, some camera lids cannot be covered, and the battery contacts that can be covered and can be used by the camera have an impact. The longer the time, the longer the elasticity will decrease. Will cause poor contact. Another protective panel cannot play the battery's maximum energy efficiency because the protective circuit is in 2. 5V automatically power off, the camera will suddenly power off, will not automatically shut down, may cause losses to the camera.

2. 14500 Over Release Problem

Some details on the minimum voltage total problem without a protective plate should be noted:

The voltage range of the camera, typically from 2.4 V to 4.2 V

Therefore, the camera will often be turned off when the voltage is up to 2.4 V. The camera has selected a choice of battery type (alkaline, nickel battery, lithium battery). Choosing different battery type shutdown voltage is not the same, as long as the lithium battery is selected. The shutdown voltage is 2.6 V. Batteries without protective panels have a safe voltage of 2.5 V, so there is no overdischarge problem, and they can also maximize battery energy efficiency. (determined by your camera)

3. 14500 Overcharge Problem

When the lithium battery core is overcharged to a voltage higher than 4.2 V, side effects begin to occur. The higher the overcharge voltage, the higher the risk. After the lithium core voltage is higher than 4.2 V, the number of lithium atoms remaining in the cathode material is less than half. At this time, the cell often collapses, causing the battery capacity to permanently drop. If you continue to charge, since the negative cell is full of lithium atoms, the subsequent lithium metal will accumulate on the surface of the negative electrode material. These lithium atoms grow dendritic crystals from the negative surface to the direction of lithium ions. These lithium metal crystals pass through the diaphragm paper and short-circuit the positive and negative poles. Sometimes the battery explodes before the short circuit occurs. This is because, during the overcharging process, the electrolyte and other materials will crack to produce gas, causing the battery shell or pressure valve to swell and burst, allowing oxygen to enter the lithium atom that accumulates on the negative surface. Reaction, and the explosion.

Therefore, when charging a lithium battery, it is necessary to set a voltage limit so that the battery's life, capacity, and safety can be taken into account at the same time. The ideal charging voltage limit is 4.2 V. Lithium core discharge should also have a lower voltage limit. When the core voltage is lower than 2.4 V, some materials will begin to be destroyed. And because the battery will discharge itself, the longer the discharge, the lower the voltage will be. Therefore, it is best not to stop at 2.4 V when discharging. During the period from 3.0 V discharge to 2.4 V of the lithium battery, the energy released only accounts for about 3 % of the battery capacity. Therefore, 3.0 V is an ideal discharge cut-off voltage. When charging and discharging, in addition to the voltage limit, the current limit is also necessary. When the current is too large, lithium ions do not have time to enter the cell and will gather on the surface of the material.

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