What are the advantages and disadvantages of square lithium batteries? Which is better

1. Aluminum-plastic film soft-packed square lithium battery Soft-packed square lithium battery has several electrolytes, one is liquid electrolyte, one is colloidal electrolyte, and the other is solid electrolyte. Different electrolytes are square. The low temperature resistance of lithium batteries is different. From the perspective of the current application practice of these three electrolytes, the low-temperature performance of the solid electrolyte prismatic lithium battery is the best, because the solid electrolyte will not freeze the substance due to the temperature, which affects the normal discharge. Due to the chemical defects of the solid electrolyte itself, the electronic conductivity is the lowest among the three electrolytes. Solid-state lithium batteries have the highest discharge capacity efficiency in ultra-low temperature environments, but cannot achieve rate discharge. Discharge above -30°C can achieve low rate discharge. The colloidal low-temperature lithium battery has an ideal discharge capacity in a medium-low temperature environment, but it is slightly worse than the solid low-temperature lithium battery, and the liquid state is the worst. The thickness of the soft-packed square lithium battery can be 0.4mm, can withstand a certain arc of bending, and the shape can be customized according to product requirements, so many lithium batteries for wearable electronic devices currently use square soft-packed lithium battery. 2. Aluminum shell prismatic lithium battery, aluminum shell low temperature lithium iron phosphate battery (1) Aluminum shell prismatic lithium battery adopts winding processing technology, so under the same capacity, the volume and weight are larger and heavier than soft package prismatic lithium battery. (2) The electrolyte used in the aluminum shell prismatic lithium battery is liquid, which is easy to be frozen in a low temperature environment, and the internal resistance greatly increases, which affects the battery discharge capacity, and even lithium precipitation occurs, making the battery useless in a low temperature environment. . (3) The aluminum shell may be corroded by the electrolyte, resulting in leakage and scrap; (4) However, the aluminum shell prismatic lithium battery has better advantages in achieving capacity expansion and parallel connection; (5) The liquid electrolyte is prone to electrolysis. After the gas appeared, the battery swelled and burst, so the aluminum shell batteries are equipped with safety valves to guard against explosion accidents; (6) The aluminum shell lithium battery has poor deformation ability and is easy to cause damage; (7) The aluminum shell square lithium battery is in the thickness of the battery And the shape is serious, and the variability is not free; on the whole, the polymer lithium battery in the soft pack square lithium battery is better than the lithium iron phosphate battery, but it depends on the use scene, the actual demand conditions of the use scene will determine which This type of square lithium battery is better. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: Do you know about lithium-sulfur batteries?