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