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An overview of lithium batteries for smart watches?

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An overview of lithium batteries for smart watches?

Release date:2017-12-29 Author: Click:

The basic structure of modern batteries includes three elements: positive electrode, negative electrode, and electrolyte. As a kind of battery, smart watch lithium battery also has these three elements. Lithium ion technology in general uses liquid or inorganic colloidal electrolytes and therefore requires a strong outer shell to contain flammable active ingredients, which increases the weight and cost of the battery and also limits the size and shape flexibility. In general, the minimum thickness of liquid lithium-ion secondary batteries is 6mm, and it is more difficult to reduce them again. The so-called polymer lithium-ion batteries use polymer materials as their main battery system in at least one or more of the three major configurations.

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The new generation of polymer lithium-ion batteries is already very high in the degree of polymerization, so the shape can be thin (0.5 mm thin), arbitrary area, and arbitrary shape, improving the flexibility of battery design , so that it can meet the needs of the product, made of any shape and capacity of the battery. At the same time, the polymer lithium-ion battery unit energy than the current general lithium-ion battery increased by 50%, its capacity, charge and discharge characteristics, safety, operating temperature range, cycle life and environmental performance, etc. are more than lithium-ion battery The increase in magnitude.


Current liquid lithium-ion batteries sold on the market can easily cause rupture of the safety valve and cause fire when overcharged. This is very dangerous, so it is necessary to install a protective IC circuit to ensure that the battery does not overcharge. . As for the high-molecular polymer lithium-ion battery, this type of battery has relatively good resistance to charge and discharge characteristics with respect to a liquid lithium-ion battery, so the requirements for externally applied protection IC lines can be appropriately relaxed. In addition, in terms of charging, the polymer lithium-ion battery can be charged using the IC constant current, and compared with the time required for the CCCV charging mode adopted by the lithium-ion secondary battery, many waiting times can be shortened.

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