1 Sorting: Batteries of different batches should not be used together in theory. Even cells of the same batch need to be screened, and cells with relatively concentrated parameters are placed in the same lithium battery pack and in the same battery pack.   2 Thermal management: For cells with inconsistent internal resistance, the heat generated is different. Adding a thermal management system can adjust the temperature difference of the entire lithium battery pack to keep it within a small range. The cells that generate more heat still have a high temperature rise, but they will not open the gap with other cells, and there will be no obvious gap in the deterioration level. 3.Battery balance management: To solve this problem, the battery management system BMS has designed a balance function. To ensure a good use environment for the lithium battery pack, try to ensure a constant temperature, reduce vibration, and ensure that water, dust, etc. contaminate the battery pole. Master the development law of the inconsistency of single cells in the lithium battery pack, and adjust or replace the batteries with extreme parameters in time to ensure that the inconsistency of battery pack parameters does not increase with use time. 4.  Energy management strategy: In terms of energy management, when the output power allows, try to reduce the depth of battery discharge. Introduce a practical battery pack energy management and balance system, formulate a reasonable battery balance strategy, actively intervene and reduce battery inconsistency. Try to prevent the battery from being deeply discharged while avoiding overcharging of the battery.     How to judge the consistency of the lithium battery pack? The consistency of the lithium battery pack needs to be judged by using special tools to measure the capacity, internal resistance, and charge-discharge curve. Professional instruments and equipment are used here: lithium battery sorting machine,  sub-capacity cabinet,internal resistance tester, etc.

  The Working Principle Of Lithium Battery Spot Welding Machine 1. AC pulse spot welding machine   The thyristor is controlled by the single-chip microcomputer to intercept the AC pulse voltage to the primary coil of the welding transformer, and the transformer converts the high-voltage pulse into a low-voltage large current and outputs it to the spot welding needle for discharge spot welding. 2. Energy storage spot welding machine The charging voltage of the energy storage capacitor is controlled by the single chip microcomputer, and then the discharge time of the capacitor to the welding transformer is controlled, so that the secondary of the welding transformer outputs the same amount of work to the spot welding needle for discharge spot welding each time.   3. Intermediate frequency welding power source The AC input current is rectified into direct current, and the direct current is converted into high-frequency pulses by the inverter to the primary of the intermediate frequency transformer.   4. Transistor spot welding machine The most ideal resistance welding power source does not require a welding transformer, the current rises quickly, and the current waveform is directly output at high frequency. You can choose constant current, constant voltage or constant current and constant voltage control mode. 5. Laser spot welding machine It is composed of crystal, xenon lamp, condensing cavity, optical resonant cavity, cooling filter parts and laser power supply. In the battery industry, the welding of steel shells and aluminum shell cover plates has long been widely used. In recent years, spot welding of polymer PACK protective plates has also been used. Compared with resistance welding, laser welding machine has the advantages of not needing to grind the spot welding needle, the welding is firm, the welding spot is uniform, and it is not easy to produce false welding.

Today, we send one set of coin cell assemble machine shiiped to India, this equipment mainly used for coin cell battery lab research. Include Film coating machine, Rolling heat press machine, coin cell crimping machine, coin cell punching machine，etc. By the way, we also can supply full set lithium battery equipment and battery materials for lithium battery research or production, if you have any needs, feel free to contact us.

The Difference Between Carbon Paper And Carbon Cloth Carbon paper(CNT) and carbon cloth are two types of carbon fiber products.Often used as a gas diffusion layer (GDL),It is widely used in fuel cell PEM.GDL plays a very critical role in fuel cells, including: protecting and supporting catalysts, conducting electricity, conducting gas, and expelling water. What is the difference between carbon paper and carbon cloth? In terms of technology, carbon paper is processed by non-woven, and carbon cloth is processed by spinning.Structurally, carbon cloth has a porous structure and a rougher surface, and carbon paper has a smoother surface.Both can be used as GDL gas diffusion layers in fuel cells. At present, in industrial-scale use, carbon paper is mostly used, and in the field of laboratory scientific research, carbon cloth is mostly used. Studies have shown that carbon paper works better than carbon cloth under conditions of lower humidity.The reason is that the structure of carbon paper is more tortuous than carbon cloth, which prevents moisture loss and reduces ohmic losses.Under the condition of high humidity and low current density (less than 0.6A/cm2), there is no difference between the two effects. Under the condition of high current density (higher than 0.6A/cm2), the effect of carbon cloth is better than that of carbon paper,The reason is that carbon cloth has a more porous structure and lower curvature than carbon paper, and the surface is rough, which is conducive to the separation of water. AOT supplies high-quality carbon paper, carbon cloth, and other lithium battery material.

Carbon coated aluminum foil is made of conductive carbon-based composite slurry and high-purity electronic aluminum foil by transfer coating process.surface treatment of battery conductive substrates with functional coatings is a breakthrough technological innovation.carbon-coated aluminum foil/copper foil is to uniformly and delicately coat the dispersed nano-conductive graphite and carbon-coated particles on the aluminum foil/copper foil. Carbon-coated aluminum foil for lithium-ion batteries can provide excellent static conductivity and collect the microcurrent of active materials, which can greatly reduce the contact resistance between the positive and negative electrode materials and the current collector, and can improve the adhesion between the two,the amount of binder used can be reduced, resulting in a significant improvement in the overall performance of the battery. The performance effect of carbon-coated aluminum foil on capacitors is roughly divided into six types; 1. Suppress battery polarization, reduce thermal effects, and improve rate performance; 2. Reduce the internal resistance of the battery, and significantly reduce the dynamic internal resistance increase in the cycle process; 3. Improve consistency and increase battery cycle life; 4. Improve the adhesion between the active material and the current collector, and reduce the manufacturing cost of the pole piece; 5. Protect the current collector from being corroded by the electrolyte; 6. Improve the high and low temperature performance of lithium iron phosphate batteries, and improve the processing performance of lithium iron phosphate (LiFePO4)and lithium titanate materials.

Introduction to the Synthesis of LiFePO4 Lithium iron phosphate is a lithium-ion battery electrode material with the chemical formula LiFePO4 (LFP), which is mainly used in various lithium-ion batteries. It is characterized by large discharge capacity, low price, non-toxicity, and no environmental pollution, but low energy density, which affects the capacitance.   The synthetic method of lithium iron phosphate: 1. Solid-phase synthesis (1) High-temperature solid-phase reaction method: the most common and mature synthesis method at this stage. The nitrogen-protected push-plate furnace, mesh belt furnace, and rotary furnace are used for sintering. (2) Carbothermal reduction (CTR): The synthesis method is simple, easy to operate, and the price of raw materials is low. It is suitable for large-scale production. (3) Microwave synthesis method: the synthesis time is short, the energy consumption is low, and it is suitable for laboratory research. (4) Mechanical alloying method: 2. Liquid phase synthesis method: (1) Liquid phase co-precipitation method, (2) Sol-gel method, (3) Hydrothermal synthesis method 3. Other synthesis methods: spark plasma sintering technology, spray thermal decomposition technology and pulsed laser deposition technology are also used for the synthesis of lithium iron phosphate.   The performance of lithium-ion batteries mainly depends on the positive and negative electrode battery materials, and its safety performance and cycle life are unmatched by other materials, which are also the most important technical indicators of power batteries. 1C charge and discharge cycle life up to 2000 times. Single-cell battery overcharge voltage 30V will not burn, puncture will not explode. The lithium iron phosphate cathode material makes large-capacity lithium-ion batteries easier to use in series. In order to meet the needs of frequent charging and discharging of electric vehicles. It has the advantages of non-toxicity, non-polluting, good safety performance, wide source of raw materials, low price, long life, etc. It is an ideal cathode material for a new generation of lithium-ion batteries.

According to the inner layer AL/PP composite method, the Aluminum Laminated Film process can be divided into two types: thermal method and dry method. The advantages of the dry process are that the product has fewer appearance defects, good deep drawing performance, low equipment investment threshold, simple process and easy to master, but limited by PP glue, its interlayer peeling force and electrolyte resistance are relatively weak; The advantage of the method is that it has excellent electrolyte resistance and water resistance. The disadvantage is that the residual thermal stress and the extrusion stress between the rollers during the high-temperature and high-pressure molding process result in the relative deterioration of its appearance and deep-drawing performance. Mingguan Lithium  Film has made technological innovations in raw materials and manufacturing processes, creatively developed dry-heat composite process technology, and took into account the advantages of thermal method in terms of electrolyte resistance and water resistance, making aluminum-plastic film forming in deep drawing. , Appearance, electrolyte resistance and water resistance and other comprehensive performance has been improved. Aluminum Laminated Film  products have many performance advantages such as excellent deep drawing performance, good electrolyte resistance, good product appearance, good insulation, strong heat resistance, high heat seal strength, humidity and heat aging resistance, and high and low temperature resistance. In addition, we AOTELEC specializes in lithium batteries, supercapacitor battery equipment and materials, providing high-quality products and professional technical services. If you are interested in this, please feel free to contact us.

Carbon nanotubes are used as anode material for lithium-ion batteries and as an excellent conductive agent for lithium batteries. The effective dispersion of CNT (carbon nanotubes) in solvents plays a vital role in the conduction of lithium batteries. However, due to the extremely large aspect ratio of CNT, entanglement and agglomeration are very easy to occur, and it is difficult to disperse, which affects the performance of its electrical conductivity. The traditional CNT slurry production line is a plan with a sand mill as the core equipment, and uses multiple rough grinding and then multiple fine grinding to perform multiple grindings to cut off the entanglement between the carbon tubes and break up Reunion. However, due to the high viscosity of the CNT slurry, the grinding efficiency of the sand mill is severely reduced, resulting in long grinding time, high energy consumption, large floor space, and low overall efficiency. Therefore, Shangshui Intelligent pioneered the CNT pulping and dispersion system with a vertical media grinding and dispersing machine as the core equipment, which can carry more than 30 times the grinding flow rate of a traditional sand mill. On the one hand, it can form a complex flow field with drastic changes and greatly improve Grinding efficiency and temperature rise can be well controlled at the same time. On the other hand, the equipment can also use larger grinding beads to achieve a good dispersion effect, thereby effectively overcoming the impact of high slurry viscosity on the grinding efficiency, and preventing excessive pulverization of CNT from affecting its electrical conductivity. Compared with the traditional CNT production line, the new high-efficiency CNT pulping and dispersion system based on this core equipment has the comprehensive advantages of large grinding flow, high energy density, good product uniformity, high overall efficiency, and convenient disassembly and washing.