TOB NEW ENERGY warehouse always stocks various lithium battery materials, such as various types of button battery accessories, powder materials, substrates with different thicknesses, carbon-coated aluminum foil, carbon-coated copper foil, etc.. We can also provide some more advanced materials, if your laboratory or production line has any demand for lithium battery materials and equipment, please contact us, we will provide you with the best price and best service. Thank you for reading! Contact person:Gavin Zhu (Engineer & Sales) Email:tob.gavin@tobmachine.com Skype: tob.gavin@tobmachine.com Wechat: TOB-007

When lithium battery cathode surface discharge, the lithium ions in the hole into the cathode active materials. If the current increase the polarization increases, the discharge is difficult, and the conductivity between the electronic is poor, the electrical conductivity of the active substance by itself is not sufficient, in order to ensure good charging and discharging performance of the electrode, a certain amount of conductive agent is usually added in the preparation of the electrode to collect the microcurrent between the active substances and the fluid. As the conducting agent materials for lithium ion batteries, conventional conducting agents super-P, KS-6, conductive graphite, carbon nanotube, graphene, carbon fiber VGCF and so on are mainly used. These conducting agents have their own advantages and disadvantages. 01:SP At present lithium ion battery conductive agent or conventional conductive agent SP. Carbon black has better ionic and electronic conductivity, because carbon black has a larger specific surface area, so it is conducive to the adsorption of electrolytes and improve the ionic conductivity. In addition, carbon particles agglomerate to form a branched chain structure, which can form a chain conductive structure with the active material, which is helpful to improve the electronic conductivity of the material. 03: CNT conductive agent The application proportion in high-end digital battery field is as high as more than 50%, while the application proportion in power battery field is relatively low. However, in recent years, with the improvement of energy density, multiplier performance, cycle life and other performance requirements of power batteries, the proportion of CNT conductive agent in this field is gradually increasing.

According our customer suggestion and requirement,and with our engineer hard working,now we finally made a new design battery stacking machine. This new design battery electrode stacking machine had add two main function. 1. We add the calibration tail used for the electrode calibrate, and have the baffle to position the electrode, which can improve the precision of the machine. Can ensure the electrode can accurate drop down on the center of the stacking plate and ensure the alignment of the electrode side.And the size of the battery can change by yourself. 2. And now we have a new function of the single step, which means we can stacking the electrode 1 layer by 1 layer if you want.After we change the mode to single step mode, after we started the machine and press the foot switch and the sucker will suck a anode electrode,and carry it to the center of the stacking plate,and then carry another cathode electrode to the center of the stacking plate.Easily to debug the machine. To compare with the battery winding process, the battery which made by the stacking have small inner resistant. but have low effective.

Today we have a lot of battery electrode that need to delivery to our Russia customer,whose battery process is also provide by us.a 72Ah big prismatic battery. The process of the electrode making is mainly include battery slurry mixing,battery coating,and battery electrode roller pressing and slitting. The most important parameter of the battery electrode is the area density,thickness and the width. For the area density is controlled by the battery coating machine,and the area density is a parameter that will influence the capacity of the battery.So,a good battery coating machine is important for battery making,which can give us a good electrode with high uniform,no impurity bubble and other coating flaw.And the thickness is depend on the battery materials system and the roller press,if the compaction density is big,there could fill in more electrode in the battery case,but also will influence the rate performance.Of course,the width of the electrode is controlled by the battery electrode slitting machine,a good slitting machine can provide you the smooth cut without rag and powder. Of course,all of these things we can also supply,include the electrode,battery coating machine, battery roller press machine and battery slitting machine and also the battery process knowledge. If you are interesting about the lithium battery,please feel free to contact us.

Today we're going to talk about battery winding process. Choosing the right equipment is sometimes the key to doing a good job, especially when it comes to research and manufacturing lithium ion batteries. We, TOB New Energy, as a global professional lithium battery equipment supplier in particular understand this truth. This cylindrical cell winding machine is mainly used for 18650, 21700, 26650, 26700, 32650 cells. TOB-JR135-P pouch cell semi-automatic winder machine is used for winding battery anode and cathode with separator together in the research of Li-ion Pouch cell batteries. Here are a few key points need to pay attention to when we during the 18650 lithium battery winding process. 1.Humidity control ≤1%RH Purpose: To prevent water absorption in the battery winding process of cathode and anode electrode, resulting in poor zero voltage, self-discharge and bad cycling performance; Method:calculate the dew point and the temperature got the value. 2.  Powder control≤100，000pc/ft3，(detect diameter is 0.5um) Objective: To prevent dust from being involved in the electrode during winding, resulting in short circuit, overheat, fire and self-discharge of the cell. Methods: Dust tester was used. 3.  Abnormal cutting burr Process requirement:electrode ≤8um tabs burr≤12um Adverse effects: Burr of electrode or tabs exceeding process requirements may cause burr to Pierce diaphragm, short circuit of anode and cathode, overheat of electric cell, explosion may occur in serious cases, and serious safety hazard exists. 4. The coverage of cathode and anode Process requirements: the alignment of cathode and anode is 0.75mm Alignment of anode with separator 1.5mm Adverse effects: The alignment of cathode and anode maybe cause anode not wrap the cathode when the cell charge, the Li-ion come out of the cathode will not find the corresponding graphite to be embedded, which causes the free lithium ions in the battery cell to accumulate on the anode and produce dendrites. The dendrites puncture the separator and cause internal short circuit, thus causing potential safety hazards. The alignment between anode and the separator over the process requirement maybe will cause the anode be squeezed and deformed. Part of the powder on the electrode fall out, during the charge the cell will expand, and the powder will puncture the separator cause cathode and anode inner short circuit and cause the safety hazard.

As the core component of new energy vehicle, the quality of lithium ion battery directly determines the performance of the vehicle.Lithium ion battery manufacturing equipment generally consists of three types: front-end equipment, mid-end equipment, and back-end equipment. The precision and automation level of the equipment will directly affect the production efficiency and consistency of the products. As an alternative to traditional welding technology, laser processing technology has been widely used in lithium battery manufacturing equipment. Application of Laser welding in the production of lithium battery Welding is a very important manufacturing process from the manufacturing of lithium ion battery cell to the battery PACK. The conductivity, strength, air tightness, metal fatigue and corrosion resistance of lithium ion battery are typical evaluation standards for battery welding quality.The choice of welding method and welding process will directly affect the cost, quality, safety and consistency of the battery. Laser welding has high energy density, small welding deformation and small heat-affected zone, which can effectively improve the precision of the workpiece. The welding seam is smooth and free of impurities, uniform and compact, and no additional polishing is required.Laser welding can be accurately controlled, with small focal point, high precision positioning, easy to realize automation with mechanical arm, improve welding efficiency, reduce working hours, reduce cost;In addition, laser welding of thin plate or thin diameter wire rod will not be subject to the trouble of remelting as easily as arc welding, and it can be welded with a wide variety of materials, which can realize the welding between different materials. The characteristics of laser processing lithium ion battery (1) welding refractory materials such as titanium, quartz, etc., and can be used to weld the opposite material, the effect is good. (2) After laser focusing, the power density is high. In the welding of high-power devices, the depth-width ratio can reach 5:1, and the height can reach 10:1. (3) Can be at room temperature or special conditions for welding, welding equipment is simple.For example, a laser beam is not deflected by an electromagnetic field. It can be welded in a vacuum, air, or some gas environment, and can be welded through glass or through a transparent material of the beam. TOB NEW ENERGY LIMITED is specialized in lithium battery industry, our company can provide you a turnkey project, if you are interested in it, feel free to contact us! Thank you for reading!

Coating process is a process based on the study of the physical properties of fluids, in which one or more layers of liquid are coated on a substrate, usually a flexible film or lining paper, and then the coated liquid coating is dried or cured in an oven to form a film layer with special functions. At present, the most important coating methods for lithium ion battery are comma-roller transfer coating and slit extrusion coating. The properties of coating solution itself have a great influence on coating results.The shear rate-viscosity data of the coating solution is an important consideration before you apply the coating.When the coating solution has a very strong viscoelasticity, usually about the coating process, will bring greater difficulty. Viscoelasticity is the reaction of viscosity and elasticity after fluid deformation. Some fluids have only viscosity change under shear force, while more complex fluids have strong elastic energy after shear deformation.How do you determine the viscoelastic energy of a fluid?It can be judged by the curve of shear force and viscosity. After the pressure release, this change in the fluid will greatly affect the effect of coating. What effect does that have? In the slit coating, if the solution with a greater shear force from the coating head lip extrusion, or with a faster speed coating, because the solution in the coating after completion, in the case of pressure release, there will be shrinkage, resulting in the formation of similar vertical stripes.Even in severe cases, retraction of the solution can result in electrode creases and crimping. So how do you prevent these defects? In the slit coating process, we have to be very careful to control the flow of fluid in the coating head, so that the solution is very uniform flow out of the lip, and the solution of the shear force as much as possible to control to the minimum. Generally speaking, the general coating solution has the ability of self-leveling, and viscoelastic body is not easy to flow, so the formation of the film will be a little lower. When you want to coat a viscoelastic body, you must first fully understand the reaction of the polymer with a higher molecular weight under stress, so as to better offset the resulting defects in the coating process through control of the process. In general, making this kind of fluid coating under low shear force is the best way to reduce the probability of defects!

Lithium ion battery forming is the first charge process of the lithium ion battery.The purpose of this work is to make lithium ion battery have the electrochemistry active.The forming process is forming a solid electrolyte interface film(SEI film),the SEI film have the character of the solid electrolyte interface,is a electronic insulator but this film is a excellent conductor for Li+,the Li+can pass the SEI film freely.The important ingredient of the SEI film is Li2CO3、LiF、LiOH、ROCO2Li、ROLi etc.The quality of the SEI film have a big relativity with the forming process,if the forming process is not good,it could not forming a high quality SEI film,and then the will have bad influence of the cycle life and the electrochmistry performance. The forming process can activate the cathode and the anode material have the electrochmical reaction and the forming film ingredient of the electrolyte forming the SEI film at he surface of the anode,effectively prevent the reaction of the solvent and the anode active materials,admit the de-intercalation of the Li+.The state of the Li+directly influence of the battery anode interface,capacity performance,self discharge,cycle performance and safety performance. TOB New Energy can provide full set of battery formation charge and discharge machine. They are suitable for coin cell,pouch cell and cylindrical battery formation and grading in battery production line manufacturing.