1.Test method for anode graphite moisture (1) The weight loss of the sample after baked is the weight of the lost moisture, and the ratio of the reduced weight to the weight of the sample is the weight of the water content of the sample. (2) Instruments and Reagents:Moisture meter(TOB-AKF-CH6), medicine spoon Sample Graphite Powder Instruments and accessories AKF-CH6 Karl Fischer moisture tester 10 ml sample feeding bottle High purity nitrogen 99.99% Electronic balance 0.1 mg Reagent Coulomb method Karl Fischer reagent, made in China Instruction parameter Ventilation flow:30ml/min Heating temperature: 180℃ Electrolytic speed: automatic Mixing speed: 6 Blank deduction: calculation Measure method (1) Turn on the TOB-AKF-CH6 moisture tester and add an appropriate amount of Karl Fischer reagent to the titration tank to ensure that the reagent is between the maximum and minimum scale. (2) Turn on the nitrogen cylinder ,set gas flow ,temperature (3 ) Wait for blank electrolysis balance test of the instrument. (4) For sample testing, take appropriate amount of sample into the sample bottle, place it on the heating tank, connect the heating tracing tube, click start measurement, then sample, input relevant parameters, and wait for the measurement results 2. Test method foranodegraphite tap density (1)Vibrate the graphite contained in the steel cylinder in the tap density tester for 10 minutes, calculate the volume after vibration through its descending depth, and then divide the weight of graphite by the volume after vibration to obtain the tap density. (2)Instruments: powder tap density meter, steel cylinder (with steel cap), medicine spoon, depth vernier caliper, flattener powder tap density meter: You can use  TOB-TDT-JZ-7 Powder Tap Density Tester Email : tob.amy@tobmachine.com Skype : amywangbest86 Whatsapp/Phone number : +86 181 2071 5609

The coating process is often prone to appearance problems, such as dry cracking, streaking, color difference, bulging edge, wrinkling, etc. Among them, wrinkling occurs more frequently and requires high equipment and process parameters. We need to pay attention to the follow process Design phase Predicting and solving coating wrinkle through accurate calculation and digital simulation (1) The diameter, pitch and wrap angle of roller (2) Electrodes speed, tension and deflection angle (3) Temperature, flow direction and speed of air inside the oven, etc. Manufacturing stage (1) Smoothness of the roller surface (2) Manufacturing precision of oven air nozzle; (3) Roll fastening screws. Installation stage (1) The overall installation accuracy of the coating machine; (2) Parallelism between rollers. Commissioning stage (1) Timely cleaning of foreign matter and water on the stick; (2) Poor foil strip joint and unbalanced tension on both sides of the foil strip; (3) The rubber roller surface of the pressure roller will undergo periodic elastic deformation in the course of use, when a certain degree of deformation remains, wrinkling will also occur, at which time the new product must be replaced. Email : tob.amy@tobmachine.com Skype : amywangbest86 Whatsapp/Phone number : +86 181 2071 5609

The planetary mixer, coating machine, and rolling press machine have been inspected and can be used normally. The devices are all packaged up and ready to ship. Email : tob.amy@tobmachine.com Skype : amywangbest86 Whatsapp/Phone number : +86 181 2071 5609

Recently received TOB NEW ENERGY obtained 3 new patent certificates Including: 1.    Cylindrical Cell Case 2.    Battery Film Press and Calendering and Device 3.    Lithium Battery Dry Electrode Film Roll Press Device In 2022 TOB NEW ENERGY also got 15 patent certificates. Including: 1.     Battery sorter with anti-blocking mechanism 2.     Lithium battery coater with continuous feeding device 3.     Electrode cutting machine with cleaning device 4.     Battery sorter 5.     Battery sealing machine 6.     Battery cutting machine 7.     Slurry feeding machine for large scale mixer 8.     Lab coater 9.     Electrode roller press 10.   Sealing machine with replaceable sealing die 11.   Large scale mixer 12.   Electrode dust removal device 13.   Battery electrode rolling press machine 14.   Electrode winding machine 15.   Battery coating machine heating device

The function and principle of the battery cap (1) Positive or negative terminal (2) Temperature protection function: PTC (sudden increase in resistance, cut off current) (3) Power-off protection function: CID current disconnecting device (Inner pressure rises → Vent flips → CID solder joints break) (4) Pressure relief protection function: Vent (Inner pressure rises → Vent flips → CID solder joints break → pressure continues to rise → Vent ruptures) (5) Sealing function: waterproof, gas intrusion, anti-electrolyte evaporation Key points of cap design (1) Reduce the height of the cap (2) Vent's double-sided notch is optimized to single-sided notch, and Vent's blasting and flipping consistency is better (3) Using duralumin CID application, the Vent notch is not easy to stretch and deform, and its blasting consistency is better  Email : tob.amy@tobmachine.com  Skype : amywangbest86  Whatsapp/Phone number : +86 181 2071 5609

Due to its unique advantages such as high theoretical capacity (4200mAh/g) and abundant resources, silicon (Si) anode material is expected to replace the currently widely used graphite anode and become the main anode material¹⁻² for next-generation lithium-ion batteries. At present, silicon-based anodes that are most likely to be commercialized on a large scale are silicon-carbon anodes and silicon-oxygen anodes. Although both have high specific capacities, due to the alloying and deintercalation mechanism of silicon, the structural expansion brought about by them is also very significant. Larger structural expansion will destroy the original solid electrolyte interface film (Solid Electrolyte Interface, SEI) on the surface of the silicon material, which will lead to the continuous destruction and regeneration of the SEI film during cycle charge and discharge, and consume a large amount of electrolyte, which will eventually lead to a decrease in battery capacity. fast decay². Therefore, to evaluate the performance of a silicon material, in addition to its gram capacity, first effect, and cycle efficiency, it is also very important to evaluate its expansion performance. The existing expansion evaluation methods need to prepare silicon anode materials into soft packs or laminated cells, and then monitor the in-situ expansion through force-applying structures and high-precision sensors. However, the preparation from powder materials to finished cells requires not only Mature cell production lines, and the evaluation cycle is also very long, so how to quickly evaluate the expansion performance of a silicon material has become a thorny issue that plagues many material developers.In addition, this device is also compatible with the conventional expansion test of small-sized soft packs & laminated cells (100*100mm), which truly achieves a multi-purpose machine! The four-channel silicon-based anode expansion in-situ fast screening system(as shown in Figure)draws on the assembly mode of the button battery and successfully realizes the direct measurement of the expansion performance of the silicon anode at the electrode end, and saves the need to prepare the finished battery. The manpower, material and time costs required for the core, accurately evaluate the most important performance indicators of silicon anode materials with the smallest consumption and the fastest efficiency, making your research and development one step faster! Email : tob.amy@tobmachine.com Skype : amywangbest86 Whatsapp/Phone number : +86 181 2071 5609

The evolution stage of lithium-ion battery conductive agents ranges from zero-dimensional conductive agent carbon black materials to one-dimensional fiber-like carbon nanotube materials, and then to two-dimensional graphene materials with lamellar structure.   Conductive agent materials are an important part of lithium-ion batteries and play an important role in the electrochemical performance of lithium-ion batteries. After an appropriate amount of conductive agent is added to the electrode, the electron transfer rate inside the electrode can be effectively improved.   Graphene has the advantages of excellent mechanics, optical properties, high thermal conductivity, small resistivity and strong stability. As a new type of lithium battery conductive agent, due to its unique sheet structure (two-dimensional structure), the contact with the active material is a point-surface contact form, which can maximize the role of the conductive agent and reduce the amount of conductive agent, so that more active materials can be used and the capacity of the lithium battery can be improved.   Conductive mechanism  (1) The electronic conductivity is high, and the use of a small amount of graphene can effectively reduce the ohmic polarization inside the battery; (2) The two-dimensional sheet structure, graphene can achieve "surface-point" contact with the active material, and can build a conductive network in the pole piece from a larger spatial span. Realize "long-range conductivity" on the entire electrode ;(3) Ultra-thin characteristics, all carbon atoms on graphene can be exposed for electron transport, high atom utilization efficiency, so it can form a complete conductive network with minimal usage. Improve the energy density of the battery;(4) high flexibility, can be in good contact with the active material, buffer the volume expansion and contraction of the active material during charge and discharge, inhibit the rebound effect of the pole piece, and ensure the good cycle performance of the battery.    The effect as a conductive agent is closely related to the amount of it added. In the case of small addition, graphene is much better than conductive carbon black because it can better form a conductive network. However, graphene with a thicker layer will hinder the diffusion of lithium ions and reduce the ionic conductivity of the electrode (6-9 layers are generally considered to be the most suitable). However, due to its high cost, difficulty in dispersion and hindering lithium ion transmission, it has not been fully industrialized.   Production process  Graphene production process methods mainly include mechanical peeling method, chemical liquid phase stripping method, redox method, chemical vapor deposition method, etc., liquid phase stripping method and redox method have low cost and low purity, suitable for batteries, supercapacitors, conductive coatings and conductive inks.   In the latest research progre...