Lithium-ion battery production process and surroundings

　　Lithium-ion batteries are mainly composed of the raw material market, fuel cells, non-aqueous batteries and four parts. The lithium batteries currently used are lithium iron phosphate batteries and ternary batteries. The main reasons are the lack of raw materials. If the production process is replaced with ternary materials, the rectification effect of the new production line will require The equipment is deformed in a large circle.

　　China Battery Network News: Lithium batteries are mainly composed of supplementary, non-aqueous batteries and four parts. The main batteries currently used in the market are lithium iron phosphate batteries and ternary lithium batteries, which can be used as raw materials. If the non-ferrous iron is completely replaced with ternary materials, the rectification of the old production line can produce the huge demand for equipment that fuel cell manufacturers say.

　　Lithium process technology: three processes before, middle and back, mixed with 35%/30%/35%

　　The production process of lithium batteries is more complicated. The main production process flow mainly completes the process of adding process (section), the injection stage (middle section) of the battery cell synthesis, and the detection stage (section) after the formation and packaging, and the amount of value (purchasing amount) Variation range (35~40%): (30~35)%: (30~35)%. , The value has an incidental but the overall proportion should be met.

　　The lithium equipment corresponding to the front-stage welding of lithium battery production mainly includes mixers, welding machines, rollers, etc.; the middle-stage processing mainly includes die-cutting machines, post-press forming machines, stackers, liquid injection machines, etc.; stage-processing includes makeup machines, volume dividers, etc. Testing equipment, process logistics automation, etc. In addition, the production of battery packs also requires packaging automation equipment.

　　Lithium battery front-end production process: pole piece manufacturing is related to battery core performance

　　The result of the cutting-edge technology of lithium batteries is that the battery cells are assembled into powder form. The first process is stirring, which is about to mix the positive and steel battery materials evenly, then add the solvent, and stir them into a slurry composition by a mixer. An instant electrician completes the foundation, the hot instant, the hot completed foundation.

　　The cut and roll process is slitting, that is, the process is processed separately. Such as burr wounds during the production process, cutting, liquid injection and other procedures, or even safety hazards during battery use. Therefore, the front-end equipment in the post-relay process, such as production mixers, longitudinal machines, roller presses, and slitting machines, are the core machines for battery manufacturing, including the entire production line. Therefore, the value (scale) of the front-end equipment accounts for the entire quality. The proportion of closed electric automated production lines is the highest, about 35%.

　　Lithium battery middle process flow: go first, go after lamination

　　In the lithium battery manufacturing process, the middle process is mainly to complete the forming section of the main battery, including the manufacturing process, the pole piece process, cutting, cell forming and lamination forming, etc. It is an area that is currently discussed by domestic equipment manufacturers. The value of the lithium battery production line is about 30%.

　　The current core manufacturing process of power lithium batteries mainly includes batteries and composite sheets, and the corresponding battery structure is mainly used for batteries, soft packs, etc. The production and battery packs mainly use process technology, and soft pack batteries mainly use laminated technology. Mainly represented by 18650 and 26650 (Tesla has independently developed 21,700 batteries, which are being promoted throughout the industry). The difference between the hard case and the soft case is the use of hard aluminum case and aluminum plastic film respectively. The soft case is mainly based on The lamination process is the main technology, and the aluminum shell is the main process.

　　The soft package structure is mainly in the final stage of the high-end digital, the production efficiency of the unit product market, under the condition of the smart shell capacity, relative to the advantage of the aluminum shell battery. The current telling is in its own market, the stories that can be told, in the foreseeable, the storytelling is very vivid.

　　Because the process technology can achieve the high-speed production of batteries, and the speed of the lamination technology is limited, the existing power is mainly produced by the process, so the output of the battery is greater than that of the lamination machine.

　　The corresponding front-end processing for shooting and lamination production is the production and die-cutting of pole pieces. Film production includes welding the rear pole piece/lug, pole piece packaging, sticking protective tape, encapsulating the pole lug, and die-cutting. Retracting and cutting, in which the receiving pole piece is used for the pole pursuit of the small pole, and the fixed-length cutting piece is used for the semi-automatic processing of the target; the punching pole piece is the use of the divided pole piece to form, and is used for the creation of the lamination process.

　　In terms of electric welding, joint wins and pandemic technology integration application manufacturers have their own focuses, which can meet the needs without introducing them.

　　The back-end process flow of lithium battery: split capacity into the core core

　　The back-end process of the lithium battery is mainly divided into the four processes of volumetric formation, detection and packaging, accounting for 35% of the value of the production line. The charging and discharging value test cycle of the battery is long, and the amount of equipment is the highest. The main function of chemical conversion is to charge and activate the battery cells after the liquid injection process, and the capacity classification process is to test the battery capacity and other electrical performance parameters for classification after the battery is activated. Formation and volume separation are respectively completed by the forming machine and the volume dividing machine, which are usually completed by an automated volumetric forming system.

　　Lithium battery process: simple but need to be combined with systematic design

　　The power battery pack system is a battery pack that is connected in series and connected, integrated power and thermal management and other battery production systems. Packaging is the key to battery power, design and application. It is the system connecting the electric core production and the application batteries of the whole vehicle. Usually, the design requirements are completed by the battery factory, the automobile factory or the production and packaging factory.

　　The lithium battery packaging production line is relatively simple. The core components include soldering, assembly, electric, testing and other processes. The core equipment is a laser welding machine and various testing equipment. Concise, and the source of laser equipment such as Han's Laser and Lianying Laser is due to its absolute advantage in the laser field and its share in the equipment field.

　　At present, the proportion of automation in packaging production is relatively low, because the current single-model new energy vehicles are very large, and the cost of the production automation line is relatively high.

　　Iron reduction and ternary: more knowledge can't get around

　　At present, the cathode materials of mainstream power batteries are divided into iron-lithium and ternary other types. Lithium iron phosphate is currently the safest cathode material for lithium batteries, and its lifespan is usually more than 2,000 times. There are many more due to industrial reasons. The decline in prices and technology brought about by maturity has caused many manufacturers to adopt lithium iron phosphate batteries for various considerations. However, lithium iron phosphate batteries show obvious defects in terms of density. Instead of cheap iron lithium batteries, BYD lithium iron phosphate batteries have an energy density of 150Wh. At the end of 2017, BYD increased the energy to 160Wh, an instant drop of 200Gw.

　　Ternary polymer lithium refers to a lithium battery using lithium nickel cobalt manganate as the cathode material, and the actual ratio of nickel cobalt manganese can be adjusted according to specific needs. Because the ternary lithium battery has a higher energy density (now the Ningde era and other power) battery production capacity, the energy density of the ternary lithium battery reaches 20Wh/kg-220Wh/kg, and the energy density of the ternary battery will be absorbed by 2020. Reached the level of 300Wh/kg), the passenger market began to turn to ternary lithium batteries, and in passenger cars with increased safety requirements, lithium iron phosphate is more popular. With the development of all-electric passenger vehicles, ternary lithium batteries are occupying an important position of increasing land.

　　Different materials have different densities and costs, and different cars and different car companies have different choices. There are different options in the production process. Different materials are different in the production process, which is mainly manifested in the use and proportioning, and the specific process. The ever-changing equipment is produced in the same line, and it is easy to modify and change the defects of production (ternary materials have strict requirements for dehumidification, and the previous iron-lithium production line basically has no dehumidification requirements), so multiple home appliance core factories will simultaneously layout and purchase separately in capacity planning equipment.

　　Editor in charge: Zhang Shanshan