The production process of lithium batteries, as well as the price and the factors affecting the price of lithium batteries?

Lithium battery price composition The price of lithium battery is mainly composed of three parts: battery cell, protective plate, and shell. At the same time, due to the power consumption and current of the electric appliance, the material of the connecting piece between the battery cells (conventional nickel sheet , Formed nickel sheet, copper-nickel composite sheet, jumper sheet, etc.) selection will affect the cost, and different link plug-ins (such as aviation plugs, ranging from more than ten yuan to thousands of yuan) may also have a greater impact on the cost And there is a different PACK process will also affect the cost. Factors affecting the price of lithium batteries 1. Selection of batteries: The selection of batteries with different material systems will affect the price of the entire lithium battery. Lithium batteries will have lithium manganese oxide (3.6V), lithium cobalt oxide (3.7V/3.8V), lithium nickel cobalt manganate (commonly known as ternary, 3.6V), and lithium iron phosphate (3.2V) depending on the cathode material. , Lithium titanate (2.3V/2.4V) and other battery cells with different material systems, the voltage platform, safety factor, number of cycles, energy density ratio, working temperature, etc. are different for the cells of different material systems. The prices of batteries of different brands will also vary greatly. The total price gradient can be divided into: special batteries (including ultra-low temperature, ultra-high temperature, ultra-high rate, special-shaped), Japanese (Panasonic, Sanyo, Sony), Korean ( Samsung, LG), domestic (domestic is divided into first-line (Lishen, Bick, BYD, ATL), second-line, and even five-line, six-line), the same material system but different brands of batteries, the price difference is also It will be very large, and the quality (safety, consistency, stability) of the battery cells of each brand through the survival of the fittest in the market is basically proportional to the price. 2. Requirements and design of lithium battery PCM PCM design can be divided into: basic protection, communication, BMS basic protection: basic protection includes over-charge, over-discharge, over-current and short-circuit protection, and communication such as over-temperature protection can be added according to product requirements: The communication protocol can be divided into I2C, RS485, RS232, CANBUS, HDQ, SMBUS, etc., as well as a simple power display, which can be indicated by a power meter and LED. BMS: BMS is the first letter abbreviation combination of BATTERYMANAGEMENTSYSTEM, called the battery management system, commonly known as the battery protection board or battery management system, mainly for the intelligent management and maintenance of each battery unit, to prevent the battery from being overcharged and overcharged. Discharge, extend battery life, monitor battery status. Its main functions include: real-time monitoring of battery physical parameters; battery state estimation; online diagnosis and early warning; charge, discharge and precharge control; balance management and thermal management, etc. The secondary system is mostly used in electric vehicle batteries. 3. Requirements and design of the lithium battery case The design of the lithium battery case can be divided into: PVC heat sealing, plastic, metal PVC heat sealing: the specific packaging form of the outer shell of the battery pack depends mainly on the specific needs of the customer’s product. For the packaging form using PVC heat sealing, it is generally applicable when the number of battery cores is small in series and the overall weight is light (≤2kg). However, for battery packs with an overall weight of ≥1kg, it is necessary to add a fixing bracket between the cells, and to protect the periphery with a glass fiber board, and then use PVC heat sealing. Plastic: Plastic casing is used, mainly after different battery packs are shaped, the casing involved may need to be moulded, and the mould cost is not a small expense. If the product is not finalized in the early stage of development, you can use the prototype shell for proofing (prototype) The strength is not as good as the strength of the material after the mold is opened and shaped), and the requirements for the material and process of the shell (especially with three-proof requirements) are different, which will also affect the cost. Metal: The metal shell is also the same as the plastic shell. Before the product is finalized or the quantity demand is not large, it is recommended to use sheet metal sample preparation. This is mainly because the sample preparation and delivery time is short. If the batch is large, it is also recommended to open the mold. For metal shells that have a waterproof level requirement, it will also greatly affect the cost, and for metal shells with special materials (such as titanium alloys, etc.), the cost will be higher. The cost of the lithium battery is mainly composed of batteries, PCM, and structural parts. In addition, the company's PACK costs, aging costs, and management costs must be added. At the same time, due to the different requirements of product technical difficulty, purchase amount, and defective rate, the price of lithium batteries will vary greatly! 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: Power battery manufacturers talk about the advantages of lithium iron phosphate batteries compared to lead-acid batteries.