The difference between liquid lithium battery and polymer lithium battery

Analyzing the application of liquid lithium batteries and polymer lithium ions in lithium batteries We have heard a lot about lithium batteries for mobile phones, but how do they fall into this category? In fact, in the field of electronic products, lithium Batteries generally include liquid lithium batteries and polymer lithium batteries* (18650 refers to a cylindrical battery with a diameter of 18mm and a length of 65mm. Although most of the 18650 on the market are liquid lithium, any claim that polymer lithium is more than 18650 The statement of safety is wrong. How are they different? The first requirement is that the two work on the same principle. Both are charged and discharged through the process of lithium ion insertion and stripping. The lithium ion is inserted into the negative electrode to charge, and the lithium ion is inserted into the negative electrode to charge and discharge. Ions are stripped from the negative electrode to discharge. As can be seen from the above figure, a lithium battery pack consists of three basic elements: positive electrode, negative electrode and electrolyte (the material between the two stages). Of course, there is an obstacle to prevent direct contact with them. The important difference between the positive and negative electrodes between liquid lithium batteries and polymer lithium batteries is as follows: 1. Data difference: polymer lithium batteries should use at least one of the three basic elements of polymer materials, such as electrolyte solution is polymerized Acrylic acid, polymethacrylic acid and other strange things are replaced. 2. Different electrolyte forms: liquid lithium batteries mainly use liquid organic solvents + conductive salts, while polymer lithium batteries use colloids/solids to replace these electrolytes (see battery for specific components) Model). Which kinds of them are amazing? Simple comparison of polymer lithium/liquid lithium polymer lithium battery. Liquid lithium battery energy density (Wh/L) 1. Energy density: The higher the energy density, the greater the capacity per unit volume. .By improving the data/anode thickness and gap, the energy density of the polymer lithium battery has reached 600Wh/L+. 2. Customization: the polymer lithium battery has a simpler appearance, achieving lightness and thinness, plus it does not use a metal maintenance shell. Package, so it is easier to make various shapes. 3. Weight: The table has been clearly marked. 4. Safety: In extreme conditions (such as overcharging/high temperature), lithium batteries will undergo chemical reactions in severe cases. In a large amount of gas, Liquid lithium batteries currently explode due to the metal shell of the package, when the internal pressure is very large, the shell ruptures, and the polymer lithium battery is only selected to be packaged in aluminum film packaging (or plastic shell), and the expansion may be interrupted only slightly higher than the internal pressure. It will cause an explosion. But it is worth noting that both liquid lithium and polymer lithium can burn at the two poles. 5. Capital: Except for the material capital in polymer lithium batteries, which is higher than liquid lithium batteries, because of the higher degree of polymer lithium batteries Customization, so it will happen in the planning process, processing more, such as various customized fixtures, test equipment, etc., resulting in polymer lithium battery capital than liquid lithium battery shape rules and regulations. Disclaimer: Articles published on this site Some pictures and content are from the Internet. If there is any infringement, please contact to delete the previous article: What is the reason for the hot charging of the electric vehicle battery?