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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The characteristics of lithium titanate batteries.lithium battery energy storage

release time:2023-03-28 Hits:     Popular:AG11 battery

  18650 battery rechargeable

  Lithium titanate (LTO) material is used as a negative electrode material in the battery. Due to its own characteristics, it is easy to interact between the materials and the electrolyte and produce gas precipitation during the reaction of the reciprocating cycle. Therefore The battery is prone to flatulence, resulting in the battery drum pack, and the electrical performance will also decrease significantly, which greatly reduces the theoretical cycle life of lithium titanate batteries. Test data shows that ordinary lithium titanate batteries will cause flatulence in a cycle of about 1500-2000 times, resulting in unavailable use, which is also an important reason to restrict the large-scale application of lithium titanate batteries.

  The improvement of lithium titanate (LTO) battery performance is the improvement of the performance of a single material and the comprehensive manifestation of the organic integration of each key material. In response to the requirements of fast charging and long service life, in addition to negative electrode materials, other key raw materials (including positive electles, diaphragms, and electrolytes) of lithium ion batteries must be used. The lithium titanate LPTO battery products that do not bloating "do not first realize the batch applications on electric bus bus.

  Test data shows that under the conditions of 6C charging, 6C discharge, and 100%DOD, the cycle life of lithium titanate LPTO monomers exceeds 25,000, and the remaining capacity is more than 80%. At the same time Its life; the actual application of Chongqing's fast charging pure electric buses also shows that after the battery group, the performance of electrical performance is also very good, which can ensure the daily commercial operation of pure electric buses.

  advantage

  The use of electric vehicles to replace fuel vehicles is the best choice to solve urban environmental pollution. Among them, lithium -ion power batteries have aroused extensive attention from researchers to meet the requirements of electric vehicles on vehicle -type ion power batteries. The long -lived negative materials are its hot spots and difficulties.

  Commercial lithium -ion batteries are mainly used in the negative electrode of the lithium ion battery, but there are still some disadvantages in the application of lithium batteries with carbon as negative: lithium batteries:

  1. When charging, it is easy to make lithium branches crystal, which causes a short circuit of the battery and affects the safety performance of the lithium battery.

  2. It is easy to form a SEI membrane, resulting in the low efficiency of the first charge and discharge, and the irreversible capacity is large;

  3. The platform voltage of carbon materials is low (close to metal lithium), and it is easy to cause the decomposition of electrolyte, which brings hidden safety hazards.

  4. The volume changes in the process of lithium ion embedding and out of the process, and the cycle stability is poor.

  Compared with carbon materials, spine -stones have obvious advantages:

  1. It is a zero -deserved material, with good circulation performance;

  2. The discharge voltage is stable, and the electrolyte does not decompose, which improves the safety of lithium battery;

  3. Compared with the carbon negative material, lithium titanium titanate has a high lithium ion diffusion coefficient (2 *10-8cm2/s), which can be charged at a high power.

  4. The potential of lithium titanate is higher than that of pure metal lithium, and it is not easy to generate lithium branches crystal, which provides the foundation for ensuring the safety of lithium batteries.


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