Comparison of polymer battery and liquid lithium battery

Comparison of polymer batteries and liquid lithium batteriesDue to the different processing processes of each manufacturer, the polymer lithium battery market is divided into winding types (represented by Sony and Toshiba) and laminated types (TCL, ATL as representatives). Structure, but the specifications of most mobile phones require less than 4 mm thickness. Compared with the liquid, the polymer outer packaging uses a thinner aluminum film, which is thinner than the steel shell and aluminum shell, and the processing method is different from that of the liquid lithium battery. The thinner the polymer, the better the processing effect. In theory, batteries with a thickness of less than 0.5mm can be processed. Liquid lithium batteries are just the opposite. The thicker the better, the more difficult to process batteries with a thickness of less than 4mm. Even if processed, the output is significantly lower than that of polymer lithium batteries, and the cost is not an advantage. Therefore, the thinner the battery, the lower the polymer processing cost, and the higher the liquid processing cost. However, in terms of thicker specifications, the liquid lithium power supply chain is mature, the process is mature, the processing efficiency is high, the output is high, and it has strong manufacturing cost advantages. Judging from the current market, the capacity of the liquid lithium battery of the 5mm and 6mm thickness series is much higher than that of the 3mm and 4mm thickness series, but the price is much lower. Theoretically speaking, the material cost of polymer is similar to liquids with thickness specifications of 5 mm and 6 mm, but the current cost of 5 mm and 6 mm series batteries is much higher than that of liquids, so there is still a long way to go. In this specification. The important structure of the battery is composed of three parts: positive electrode, negative electrode and electrolyte. The so-called polymer lithium battery uses polymer materials as an important battery system in at least one or three important structures. In polymer lithium battery systems, polymer materials are mainly used for positive electrodes and electrolytes. The positive electrode material includes conductive polymers or inorganic compounds commonly used in lithium batteries, the electrolyte can be a solid or colloidal polymer electrolyte, or an organic electrolyte, and the negative electrode material is usually lithium metal or lithium-carbon intercalation compound. Lithium-ion technology usually uses liquid or colloidal electrolytes, so strong secondary packaging is required to contain flammable active ingredients, which adds weight and cost, and limits size flexibility. The polymer lithium ion method has no excess electrolyte, so it is more stable, and it is not easy to cause dangerous situations due to battery overcharge, squeeze, collision or other damage, and it is not easy to overuse. The new generation of polymer lithium batteries can be changed in thin shape (0.8 mm thin) and any shape and any area, which greatly improves the flexibility of battery design, can meet the requirements of the product, and can be made into any shape and battery capacity. The equipment is Application developers provide a high degree of flexibility and adaptability in the power supply solution, in order to maximize the optimization of product performance. At the same time, the unit energy of polymer lithium batteries is 50% higher than that of current general-purpose lithium batteries and their capacity, charging and discharging characteristics, safety, operating temperature range, cycle life (over 500 times) and environmental performance are greatly compared with lithium batteries increased. Polymer lithium battery The electrolyte of polymer lithium battery is different from ordinary battery. In the original design in the 1970s, solid polymer electrolytes were used. This electrolyte is like a plastic film, does not carry electrons, but allows ion exchange (chargeable atoms or groups of atoms). The polymer electrolyte replaces the traditional porous membrane of saturated electrolyte. The design of the dry polymer electrolyte can simplify assembly, improve the mechanical strength of the battery, is safe, and can be made into ultra-thin geometric shapes. The thickness of a single battery can be as thin as 1 mm. The device designer can design the shape and size of the battery according to his own imagination. Unfortunately, the conductivity of solid-state polymer lithium batteries is very poor. The internal resistance is too high to supply the high pulse current required by the current communication equipment to drive the hard disk of the notebook computer. Heating the battery to 60 degrees Celsius can quickly increase the conductivity, but this requirement does not apply to portable devices. 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