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.