Today, the pouch cell battery machine lab line shipped to Sri Lanka ,the equipment mainly includes the following types:  Vacuum drying over, Battery mixing machine, Film coating machine, Battery electrode calendering machine, e Ectrode cutting machine, Die cutting machine for Pouch cell, Battery stacking machine, Ultrasonic spot welding machine for battery tab, Heat sealing machine for Pouch case, Vacuum pre-sealing machine for touch cells, s etc     AOT battery also provides various battery materials, including cathode materials, anode materials,  battery cases, battery separators, electrolytes, etc. Solid state battery materials: NPSCl (Na5.5PS4.5Cl1.5) LLZO,NASICON etc.; Sodium ion battery materials: Prussian blue Prussian white, hard carbon, Sodium metal disks chips . sodium foil etc.

1. Layered oxide cathode material Layered oxides  in sodium ion batteries material have inherent cost advantages, not only because these materials can learn from the highly mature solid-state or co precipitation methods commonly used in lithium-ion batteries to achieve low-cost large-scale production, but also because they have a rich selection of active elements. The chemical formula of layered oxide positive electrode materials for sodium ion batteries can be expressed as NaxTMO2 (x ≤ 1, where TM is one or more of the 3D transition metals such as Ni, Mn, Fe, Co, Cu, etc.). By studying the coordination environment of sodium ions and the stacking mode of oxygen, layered oxides can be classified into the following categories: 2. Polyanionic positive electrode material Polyanion positive electrodes have better thermal stability and thus better safety, but their biggest drawback is their low electronic conductivity, which prevents them from charging and discharging under high currents, and their specific capacity is low. Therefore, its conductivity is often improved by coating and doping, thereby improving its electrochemical performance. The general formula of polyanionic compounds can be expressed as NaxMy [(XOm) n –] z, where M is an electrically active transition metal and X is a non-metallic element such as P, S, Si, etc. Among them, sodium vanadium phosphate [Na3V2 (PO4) 3] material with NASCON (Na Super ionic conductor) structure has high voltage and specific capacity. 1.3 Prussian Blue Cathode Materials The Prussian blue cathode material has a perovskite like structure and a face centered cubic structure. The molecular formula is AxM [Fe (CN) 6] y · zH2O (0

1.Small Vacuum Slurry Mixer Machine AOT-AX-2000 2.53L Vacuum Drying Oven  For Lab Battery Raw Material Baking AOT-DZF-6050 3.Automatic Pouch Cell Stacking Machine AOT-MSK-111A-ES 4.Heating Sealer Machine For Pouch Cell Case Top And Side SealingAOT-TSS-200 5Aluminum Laminated Film Forming Machine AOT-MPF-200 6Pole Piece Electrode Die Cutting Machine  AOT-DC-80 7.2000W 20KHz Ultrasonic Spot Welder Machine AOT-USW-2000W 8. Pouch Cell Hot Press Shaping Machine AOT-HPS-200H

In terms of technology:   1. The positive electrode ingredient has too little conductive agent (the conductivity between materials is not good because the conductivity of lithium cobalt itself is very poor) 2. There is too much adhesive for the positive electrode ingredient. (Adhesives are generally polymer materials with strong insulation properties) 3. Excessive adhesive for negative electrode ingredients. (Adhesives are generally polymer materials with strong insulation properties) 4. Uneven distribution of ingredients. 5. Incomplete binder solvent during ingredient preparation. (Not completely soluble in NMP, water) 6. The density design of the coating slurry surface is too high. (Long ion migration distance) 7. The compaction density is too high, and the rolling is too compacted. (Excessive rolling may cause damage to the structure of active substances) 8. The positive electrode tab is not firmly welded, resulting in virtual welding. 9. The negative electrode ear is not firmly welded or riveted, resulting in false soldering or detachment. 10. The winding is not tight and the core is loose. (Increase the distance between positive and negative electrode plates) 11. The positive electrode ear is not firmly welded to the housing. 12. The negative electrode ear and pole are not firmly welded. 13. If the baking temperature of the battery is too high, the diaphragm will shrink. (Reduced diaphragm aperture) 14. Insufficient liquid injection amount (conductivity decreases, internal resistance increases quickly after circulation!) 15. The storage time after liquid injection is too short, and the electrolyte is not fully soaked 16. Not fully activated during formation. 17. Excessive leakage of electrolyte during the formation process. 18. Insufficient water control during the production process, resulting in battery expansion. 19. The battery charging voltage is set too high, causing overcharging. 20. Unreasonable battery storage environment.   In terms of materials: 21. The positive electrode material has high resistance. (Poor conductivity, such as lithium iron phosphate) 22. Impact of battery separator material (separator thickness, small porosity, small pore size) 23. Effects of battery electrolyte materials. (Low conductivity, high viscosity) 2 24. Positive electrode PVDF material influence. (high in weight or molecular weight) 25. The influence of positive electrode conductive material. (Poor conductivity, high resistance) 26. Effects of positive and negative electrode tab materials (thin thickness, poor conductivity, uneven thickness, and poor material purity) 27. Copper foil and aluminum foil materials have poor conductivity or surface oxides. 28. The riveting contact internal resistance of the cover plate pole is too high. 29. The negative electrode material has high resistance. 30. Deviation of internal resistance testing instruments.  

The electrolyte is in a harsh living environment. It faces the strong reducibility of the negative electrode and the strong oxidation of the positive electrode. Adding flame retardants to make the electrolyte non combustible and reduce its flammability is an effective way to improve the safety of batteries. However, this approach has limited improvement in battery safety, especially when the capacity of commercial batteries exceeds 100 ampere hours, and flame retardants cannot stop them,Because the combustion of batteries is contributed by combustible gases.   During the process of thermal runaway, there are two factors that lead to thermal runaway safety. One contributes to combustible gases, and the other contributes to oxygen and temperature.   The first is combustible gas: Flame retardants can only ensure that the electrolyte is not combustible in a liquid state, but the negative electrode reacts with the electrolyte to produce a large amount of reducing gas, which is flammable and provides a foundation for combustion.   The second is that the exothermic reaction of the battery body provides high temperature. The solid body generates oxygen when heated at around 200 degrees Celsius, and the solid part of the battery provides a high-temperature environment; Combustible gases themselves can burn, and the solid part provides a temperature, which inevitably leads to combustion.   By changing the reaction path between the electrolyte and the negative electrode, reducing the types and quantities of reducing gases, the safety of the battery can be improved from this perspective. In the thermal runaway test, there are three temperatures that represent different physical meanings:   T1 represents the battery entering the self heating stage, where the negative electrode reacts with the electrolyte to form a reducing gas. The reducing gas flows to the positive electrode, attacking the lattice of the positive electrode, causing a phase transition and oxygen release. Oxygen reacts with EC in the electrolyte, causing a temperature increase. Form T2, which is the triggering temperature for thermal runaway. The time spent in the temperature range of T1 and T2 is relatively long, and work can be done from passive protection. The positive and negative poles react violently, forming the highest temperature T3.   Regulation method: 1. Electric regulation: discharge control of the battery. Because the reaction is for electrons, through discharge, electrons are released, and if electrons are not released, reducing gases cannot be generated. 2. Gas regulation: Use intelligent exhaust valves to forcibly exhaust, avoiding crosstalk, accumulation, and combustion. 3. Cooling: Reduce reaction speed. 4. Poisoning agent: Release a poison agent on the composite collector to absorb the gas. 5. Reduce or block the path of combustible gas production. For example, EC free, or reducing the amount of EC electrolyte, such as perfluorinated electrolyt...

The working principle of Sodium-ion battery is the same as that of lithium ion battery, that is, during the charging and discharging process, lithium ion is inserted/de inserted and inserted/de inserted back and forth between the positive and negative electrodes, which is also called "rocking chair battery". Lithium ion batteries mainly rely on the movement of lithium ions between the positive and negative electrodes, using embedded lithium compounds as the positive electrode material. The working principle of Sodium-ion battery is: during charging, Na+is disembedded from the positive electrode and embedded into the negative electrode through battery electrolyte; When discharging, the opposite is true. Sodium battery, with its abundant resource reserves and significant advantages in low-temperature performance, rate performance, and cost compared to lithium battery, gradually demonstrates the potential for specific scenarios. AOTELEC provides sodium ion battery materials. Recently, sodium metal shipped to countries such as South Korea, the United States, Germany, etc. Sodium chips is specially designed for button batteries (2032, 2025, 2016) to use composite sodium sheets, with a diameter of 15.6mm, a thickness of 0.45 mm, and a purity of more than 99.7%. It adopts quadruple protection packaging technology, which can be stored for a long time and can be used as needed. Please contact me if you need sodium ion materials or sodium ion metal chips.

American clients need to establish a research laboratory for sodium ion batteries. At the end of last month, we received an order for coin battery production line equipment. Including Compact Vacuum Film Coating Machine, Hot Roller Press Machine,Coin Cell Crimper Machine,sodium ion metal chips, sodium ion battery electrolyte .etc. This is a packaging information image, all packaging is standard export packaging. Please find photos for your reference. AOTELEC provide a complete set of Sodium battery manufacturing equipment and materials,If you are interested, please contact me.

After more than a year of hard work, AOTELEC has become a supplier to Tesla. For over a year, we started sending samples for testing, passed the final test, and placed orders. Thank you to Tesla for recognizing AOTELEC's services and the quality of sodium battery materials. I hope to achieve more cooperation in the future. This order mainly sodium battery materials, including sodium matal chips and some other sodium battery materials. These sodium chips are used for sodium-ion coin cell battery research. The sodium chip is covered with 30um aluminum foil on one side as a support and current collector, and also plays the role of protecting the sodium. SThese sodium chips have uniform size, smooth and bright surface, and can be stored for a long period of time. For the thickness, the sodium is 0.45mm and the Al protection layer is 30um with a blue cover.

Pouch cell battery automatic stacking machine ready to ship USA,This is our old customer who bought a stacking machine with a thickness of 70mm last year. This year, due to factory expansion, we have added two identical stacking machine equipment. After 20 days of production and experimentation, we are preparing to send it to the customer today. Features: 1. Battery separator: active unwinding; constant tension control; full correction of the separator; static removal of the separator; alignment accuracy of the separator±0.5mm. 2. High precision: Through the precise positioning of the pole piece, the overall accuracy of the battery electrode sheets in the stack is guaranteed to be±0.5mm. 3. Efficiency: The lamination speed can reach 1.6s~2s/Pcs (auxiliary time 10S). 4. Reliability: The high-precision and frequently moving modules of the equipment are fixed with positioning pins. 5. Simple changeover: both the pole piece gauge structure and the stacking table are equipped with positioning pins. When changing the type, you only need to insert the mold into the corresponding positioning pins. According to the requirements of operating level, the start-up personnel can change the model by themselves after simple training. 6. Humanization: It has a perfect alarm prompt function;

AOTELEC is a high-end laboratory furnace supplier, we can provide customizable tube furnaces, atmosphere furnaces, elevator furnaces, box furnaces,Muffle Furnace etc. The laboratory 1400C Electric Box Muffle Furnace and 1700 Vacuum Tube Furnace have been packaged and ready to be shipped to customers in the United States. AOT-GSL-1750X vacuum tube type high temperature furnace uses silicon molybdenum rod as heating element, rated temperature is 1700℃, adopts B type double platinum rhodium thermocouple temperature measurement and 518P temperature controller automatic temperature control, with high temperature control precision (±1℃).

Yesterday, our laboratory pouch cell equipment was shipped to our Canada customers. These pouch cell battery machine mainly include battery testers, Li-ion Battery Vacuum Sealing Machine、Battery Heat Sealing Machine ,Ultrasonic Metal Spot Welding Machine , Vacuum Mixing Machine ,etc. The mold design and head selection of packaging equipment for flexible battery equipment are crucial. When using hard sealing, it is possible to add silica gel to the hard head to compensate for the lack of top sealing with the deformation of silica gel. Alternatively, it is also possible to design the mold for hard sealing, digging a groove to match the lug for packaging. When using soft sealing, it is not necessary to consider so much, but it is necessary to pay attention to the packaging process of soft sealing, verify the sealing performance of the packaging, and aging issues of high-temperature resistant adhesive. AOTELEC Battery Machine is specialized in lithium battery industry, our company can provide lithium battery making machine and lithium battery material, if you are interested in it, feel free to contact us!

The internal impedance consists of the following parts Ionic Resistance ① Electrolyte inside the battery separator Influencing factors: electrolyte conductivity, battery separator area, thickness, porosity, tortuosity coefficient (Gurley). ② Electrolyte inside the battery anode material Influencing factors: electrolyte conductivity, positive electrode thickness, thickness, porosity, tortuosity coefficient. ③ Electrolyte inside the battery cathode material Influencing factors: electrolyte conductivity, positive electrode thickness, thickness, porosity, tortuosity coefficient. Electronic resistance ① Active substances of two electrodes Influencing factors: electrode conductivity, thickness and area ② Fluid collection (copper foil and aluminum foil) Influencing factors: thickness, width and length of fluid collection, number and position of pole lugs ③ Lead wire (aluminum Tab , nickel Tab , internal conductive connection element) Influencing factors: overall dimension, conductivity Contact resistance between active substance and fluid collector Positive material and aluminum foil, negative material and copper foil. Make an equivalent circuit diagram of the electrode, which is mainly composed of ohmic impedance Rb, double-layer capacitance Cd, electrochemical reaction impedance Rct and diffusion resistance Rw. In the process of lithium ion insertion and removal cycle, the change of Rb value is generally small, while the change of Cd and Rct is relatively obvious.    The battery impedance is mainly reflected in the electrochemical reaction impedance, while the ohmic    impedance is relatively small. With the decrease of temperature, the impedance of the battery gradually rises, and when it drops to 0 ° C, the impedance speed increases, and the cathode impedance presents a similar trend. From the numerical point of view, the impedance of the battery mainly comes from the contribution of the cathode impedance. In fact, during the whole cycle of the battery, the impedance of the cathode occupies the main part of the impedance of the whole battery, which is only slightly smaller than the impedance of the whole battery. With the progress of the charge-discharge cycle, the impedance of the cathode increases, and the impedance of the battery also increases. Therefore, special attention should be paid to the cathode resistance test (resistance tester) in the process of electrode fabrication, and the electrode sheet resistivity is particularly important.

The lithium battery winding machine is used to wind lithium battery cells. It is a machine that assembles the positive electrode sheet, negative electrode sheet and battery separator into a core pack (JR: JellyRoll) in a continuous rotating manner. Winding machine principle The lithium battery winding machine has a positive and negative electrode feeding unit, and the mechanism that winds the positive electrode, negative electrode and separator together is called a winding needle.According to the shape of the battery core, it is mainly divided into square and cylindrical battery cell winding machines. Generally, the winding equipment adopts the structure of two or more winding needles and single-side needle pulling. The main mechanisms of the winding machine are: positive and negative pole pieces and diaphragm active unwinding, pole piece and diaphragm rewinding, automatic deviation correction, automatic tension detection and control. The pole piece is introduced into the winding needle part by the pinch roller driving mechanism, and is wound together with the diaphragm according to the process requirements. After the winding is completed, the station is automatically changed, the diaphragm is cut off, and the termination tape is attached. After the finished bare cells are automatically unloaded, after pre-pressing and code scanning, the good-quality finished bare cells are automatically transferred to the tray and then transferred to the subsequent process. The defective bare cells are automatically unloaded to the collection place for defective bare cells. Winding Mechanism Description ①Pre-winding: The initial feeding process of the positive and negative pole pieces.It is necessary to control the rotation angle and speed of the winding needle to match the pole piece feeding mechanism.this process involves two synchronizations: the unwinding speed of the diaphragm is synchronized with the needle winding speed, and the pole piece feeding speed is synchronized with the needle winding speed. ②Winding process: After the initial feeding process of the positive and negative electrodes is completed, the positive and negative electrodes are tightly wrapped by the separator and wound around the winding needle, and the continuous winding can be realized by turning the winding needle subsequently. In this process, the unwinding speed of the pole piece unwinding motor is adjusted by detecting the tension of the material roll to ensure the constant tension of the material roll during the winding process. The control problem in pre-winding is an open-loop control problem. Whether the real synchronization between the winding needle, diaphragm and pole piece cannot be accurately measured, which requires us to establish an accurate winding control model. Especially for the winding requirements of larger batteries. The tension of the material tape in winding can be controlled by closed-loop feedback control technology. ③Dynamic control model of the winding proce...

Vigorously developing photovoltaic and wind power is the only way to achieve the double carbon goal, and energy storage is a necessary supporting means to solve the instability of photovoltaic and wind power. Electrochemical energy storage has the advantages of high efficiency, fast response, and is not restricted by geographical environment. It is suitable for the smoothing of wind power generation on the supply side and also for power management on the demand side. Due to the advantages of abundant resources, low cost, and high safety, sodium-ion batteries and vanadium redox flow batteries have received high attention. The first seminar on energy storage and sodium-ion batteries and vanadium batteries will be held in Suzhou on February 10, 2023. The main content of the meeting will discuss sodium-ion battery materials 1.Research and development of electrolyte sodium batterie electrolyte; 2.Research progress of hard carbon as anode material for sodium batteries; 3.Key technologies for the production of Prussian blue cathode material for sodium batteries;

Notification of Chinese Spring Festival Holiday Dear all valued clients: Thank you all for the support in year of 2022! AOTELEC keep providing quality products and services as always, We hope that we can have more cooperation next year, win-win cooperation. Now we want to inform you that our Chinese Spring Festival holiday period: 2023-1-16 to 2023-1-29, total 14 days. We will go back to work on Monday (30th January 2023). During the holidays, We may not be able to respond to you in time, If there is an emergency, you can try to call 0086-592-7161550, thank you! AOTELEC BATTERY EQUIPMENT MANUFACTURER  wish you a happy new year! Best wishes, AOTELEC GROUP 2023-1-15

The pouch cell battery laboratory assembly machine will be shipped to the UK. These battery machines have been checked and packed and sent to customers in the UK. This is our new customer. Find us through the introduction of old customers. Later, through a series of details and technical communication, the order was delivered to us at the end of October. Now, the equipment has been produced and will be sent to the customer soon. These battery machine are mainly used for pouch cell battery laboratory research. (Including Aluminum Laminated Film Forming Machine, vacuum sealing machine, Automatic Pouch Cell Stacking Machine, planetary ball mill, etc.) It also includes some lithium battery materials.(Nick tab,Copper Foil,Aluminum Foil,etc) If you need these battery devices and lithium battery materials, please contact me.

Yesterday, a 1750 degree vacuum tube furnace was shipped to Cambodia. This client is a listed company,Because customers believe in the quality and service of AOT, they choose to cooperate with us. AOT-GSL-1750X vacuum tube type high temperature Furnace uses silicon molybdenum rod as heating element, rated temperature is 1700℃, adopts B type double platinum rhodium thermocouple temperature measurement and 518P temperature controller automatic temperature control, with high temperature control precision (±1℃). In addition, the furnace has a vacuum device that can work in a variety of atmospheres, greatly increasing its range of use. The furnace has the advantages of high temperature, high precision temperature control, simple operation and convenient maintenance, and can be widely used in metallurgy, machinery, light industry, commodity inspection, higher education institutions and scientific research departments. AOTELEC is specialized in lithium battery,supercapacitor battery equipments and lithium battery materials, provides high-quality products and the most professional technical services. If you are interesting in this, feel free to contact with us.

This customer is an old customer in the United States. Last year, he purchased a battery stacking machine because the customer expanded its production capacity. In early September, he asked us to purchase the same battery stacking machine.This time  also purchased some lithium battery materials, including copper foil, aluminum foil, separator, etc.) The battery separator is automatically unrolled and introduced into the stacking table through the tension mechanism. The stacking table drives the separator to move back and forth to perform Z-shaped stacking. The anode electrode sheets are stacked first, and the two sets of manipulators respectively take the cathode and anode electrodes out of the two material boxes, and stack them on the stacking table after precise positioning. After the lamination is completed, the cells are transferred by the manipulator. Features: 1. Battery separator: active unwinding; constant tension control; full correction of the separator; static removal of the separator; alignment accuracy of the separator±0.5mm. 2. High precision: Through the precise positioning of the pole piece, the overall accuracy of the battery electrode sheets in the stack is guaranteed to be±0.5mm. 3. Efficiency: The lamination speed can reach 1.6s~2s/Pcs (auxiliary time 10S). 4. Reliability: The high-precision and frequently moving modules of the equipment are fixed with positioning pins. 5. Simple changeover: both the pole piece gauge structure and the stacking table are equipped with positioning pins. When changing the type, you only need to insert the mold into the corresponding positioning pins. According to the requirements of operating level, the start-up personnel can change the model by themselves after simple training. 6. Humanization: It has a perfect alarm prompt function; AOTELEC is specialized in lithium battery,supercapacitor battery equipments and lithium battery materials, provides high-quality products and the most professional technical services. If you are interesting in this, feel free to contact with us.

In electrodes, binders are polymer compounds used to adhere electrode active materials to current collectors. Its main function is to bond and maintain the active material, enhance the electronic contact between the electrode active material and the conductive agent and the active material and the current collector, and better stabilize the structure of the pole piece. For the positive and negative electrodes of lithium-ion batteries that expand and contract in volume during charging and discharging, the binder is required to play a certain buffering role. To choose a suitable lithium-ion battery binder, it is required that its ohmic resistance should be small, its performance is stable in the electrolyte, and it will not expand, loosen, or remove powder. Generally speaking, the performance of the binder, such as adhesion, flexibility, alkali resistance, hydrophilicity, etc., directly affects the performance of the battery. By adding the optimal amount of binder, larger capacity, longer cycle life and lower internal resistance can be obtained, which can promote the improvement of battery cycle performance, rapid charge and discharge capability, and reduction of battery internal pressure. . Therefore, it is very important to choose a suitable binder. 1. The role and performance of the adhesive (1) Ensure the uniformity and safety of the active substance during pulping; (2) It has a bonding effect on the active material particles; (3) bonding the active material on the current collector; (4) Maintain the bonding between active substances and between current collectors; (5) It is beneficial to form the SEI film on the surface of the carbon material (graphite). 2. Performance requirements for adhesives (1) It can maintain thermal stability when heated to 130-180℃ during drying and dewatering; (2) can be wetted by organic lithium battery electrolyte; (3) It has good processing performance; (4) Not easy to burn; (5) It has relatively high electronic ion conductivity; (6) The dosage is small and the price is low; In lithium-ion batteries, due to the use of organic electrolytes with low electrical conductivity, the electrode area is required to be large, and the battery assembly adopts a roll structure. The improvement of battery performance not only puts forward new requirements for electrode materials, Also, new requirements are placed on the adhesives used in the electrode manufacturing process. At present, polyvinylidene fluoride (lithium battery material PVDF) is widely used in industry as a binder for lithium-ion batteries, and N-methylpyrrolidone (NMP) is used.

The pouch cell battery machine laboratory line sent to Germany in July, after two months, the customer's laboratory was finally built.The main equipment includes battery tester,  pouch cell forming machine,electric hot roller press machine,ultrasonic spot welder ,etc. The photo below is sent by the customer Customers are very satisfied with our equipment and service look forward for next deal. AOTELEC can provide a complete set of battery pack machine assembly, as well as the corresponding complete solution. If you are interested, you are welcome to contact me!