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Coating Machine TOB-SY300J Hot Rolling Press Machine TOB-DR-H150-200 Pneumatic Die cutting Machine for Electrode Cutting TOB-MCP85 Semi-auto Battery Electrode Stacking Machine TOB-BDP200-C Lithium Pouch Cell Forming Machine TOB-SCK300 Battery Heat Sealing Machine For Top-side Sealing TOB-SFZ-200 Vacuum Heat Sealing Machine TOB-YF200-JZ   Email : tob.amy@tobmachine.com  Skype :amywangbest86  Whatsapp/Phone number :+86 181 2071 5609

The concept of grading: In a fixed requirement environment, When the lithium battery is fully charged, Release of electricity under certain conditions, The amount of power released from the battery at this point is the capacity of the lithium-ion battery. Differentiation of lithium-ion batteries according to capacity, It's grading. Purpose of grading: 1.   Distinguish between capacity-qualified products and capacity-unqualified products. If the capacity meets the requirements, it is a qualified product. If the capacity is lower than the specification, it is a unqualified product. 2.   One of the means of classifying and grouping lithium-ion batteries. Selection of monomers with the same capacity and internal resistance, Such monomers with the same performance form a battery pack. Inconsistency in battery capacity can cause inconsistency in the depth of discharge of each individual cell in the battery pack. Batteries with smaller capacity and poorer performance will reach the full state of charge earlier, causing batteries with large capacity and good performance to fail to reach the full state of charge. Vantage: simple and convenient Disadvantage: The method is a static measurement method, which does not reflect the differences in the actual application of changes and has limitations. Method of grading 1.  Discharge capacity method Lithium-ion batteries are fully charged under certain conditions and then fully discharged at a certain current, Discharge current * time, is the discharge capacity of lithium-ion battery. Advantage: Capable of accurately and comprehensively reflecting the performance of lithium-ion battery discharge capacity, etc. Disadvantage: Longer time, affecting productivity 2.  Charge capacity method Lithium-ion batteries are charged to SOC1 under certain conditions, Then follow a charging method to reach SOC2,Calculate charging capacity between SOC1-SOC2, Compare the above relationship between charging capacity and final capacity of lithium-ion batteries, Estimate the actual discharge capacity of a lithium-ion battery. Advantage: Short time and high productivity Disadvantage: Existence of bias and misjudgement. 3.  Open circuit voltage method Li-ion batteries are charged at constant current to a certain SOC，determine the relationship between open circuit voltage and discharge capacity, discharge capacity deduced from open circuit voltage. Advantage: Short time and high productivity Disadvantage: Low accuracy of judgement, Not suitable for high-precision grading. TOB NEW ENERGY provide Formation And Grading Machine for cylindrical batteries, polymer batteries, and button cell.  Email : tob.amy@tobmachine.com  Skype :amywangbest86  Whatsapp/Phone number :+86 181 2071 5609

We recently received a very good news - a customer tested our cylindrical cell lab line equipment on site, and we are very encouraged by the results. After testing by customers, our equipment performed very well, which made customers deeply feel our professional quality and technical strength. Aiming at the hot market field of cylindrical cells, we insist on quality as the core and market as the orientation, continuously invest more R&D resources, optimize product design, improve production efficiency, and provide customers with stable and reliable products. With such excellent quality equipment, the work efficiency of customers has been greatly improved. We are very grateful for the recognition and trust from our customers, which is also the greatest encouragement for our steady development. Facing the needs of customers, we will, as always, persist in the pursuit of excellence, and devote ourselves to providing customers with the best products and services, let us create a better future together! Lab Mixer Lab Coater Lab Coater electrode calender Slitting Machine Glove Box Glove Box Electrolyte Filling Machine

The battery binder in lithium batteries is an essential component that ensures the effective performance of the battery. Lithium batteries are increasingly used in various electronic devices because of their high performance and long life span. The battery binder plays a critical role in keeping the battery components together, ensuring proper contact, and preventing any leakage. One of the key advantages of lithium batteries is their ability to provide high energy and power density, making them ideal for use in high-performance devices. The battery binder, being the glue that holds the battery components together, needs to have strong adhesive properties that can withstand the stresses and strains placed on the battery during use. As lithium batteries continue to grow in popularity, the demand for high-quality battery binders has increased. Manufacturers are constantly looking for new and innovative ways to improve the performance of their products, and the battery binder is an area where significant progress has been made. There are various types of battery binders used in lithium batteries, including: (1)Cathode Binder PVDF（Poly-vinylidene fluoride） It mainly refers to homopolymers of vinylidene fluoride and copolymers of vinylidene fluoride and other compounds. - Homopolymer class PVDF, is a homopolymer of VF2, such as HSV900, 5130, etc; - Copolymer class PVDF, the main use of VF2 (vinylidene fluoride) / HFP (hexafluoropropylene) copolymer, such as 2801, LBG, etc.. CH2=CF2→(CH2CF2)n (2)Anode Binder SBR Styrene-butadiene rubber emulsion: made by the polymerization of butadiene and styrene monomer and other functional monomers. Styrene emulsion: It mainly contains two monomers, styrene and acrylate. There are more types of acrylate monomers, commonly used ones include methyl acrylate, ethyl acrylate, methyl methacrylate and so on. The presence of ester group increases the affinity between binder and electrolyte; in addition, a large number of electronegative elements in the molecular chain (with lone pair of electrons, which will continuously complex/decomplex with lithium ions under the action of electric field, which is favorable for the diffusion of lithium ions), which leads to the outstanding low-temperature performance. Acrylates: also known as pure propylene emulsion, other functional monomers, such as acrylonitrile monomer, fluorine-containing monomers, etc., are generally introduced, which can satisfy the two factors of electrolyte swelling and electronegative element content at the same time, and thus have excellent kinetic performance. Email: tob.amy@tobmachine.com Skype: amywangbest86 Whatsapp/Phone number: +86 181 2071 5609

Manganese dioxide is a chemical compound that is used in the making of dry-cell batteries. It is used in the cathode of these batteries and it helps to make the electrical connection between the cathode and the anode. This compound is very useful in dry-cell batteries and has several advantages. First and foremost, manganese dioxide is a very stable compound that can withstand high temperatures and pressure. This makes it ideal for use in dry-cell batteries, which are often subjected to extreme heat and pressure. Furthermore, manganese dioxide is a very good conductor of electricity, which helps to increase the efficiency of dry-cell batteries. This means that they can store a lot of energy and discharge it quickly when needed. Another advantage of using manganese dioxide in dry-cell batteries is that it is very readily available. This means that it is affordable and can be easily sourced. This makes it an ideal compound for use in mass-produced items such as batteries. In addition, manganese dioxide is an environmentally friendly compound that does not contain any harmful chemicals. This means that it is safe to use and will not harm the environment. It is also completely biodegradable, which means that it can be easily disposed of without causing any harm to the environment. Overall, manganese dioxide is a very useful and beneficial compound when it comes to the production of dry-cell batteries. It is highly reliable, efficient, affordable, and environmentally friendly. Its many advantages make it the perfect choice for use in a wide range of applications, especially in the production of dry-cell batteries.

Lithium manganese iron phosphate (LiMnxFe1-xPO4, LMFP) is a new type of phosphate lithium-ion battery cathode material formed by doping a certain percentage of manganese (Mn) on the basis of lithium iron phosphate (LiFePO4, LFP), which is regarded as the "upgraded version of lithium iron phosphate". The doping of manganese element can make the advantageous features of both iron and manganese elements can be effectively combined, and manganese and iron are located in the fourth period of the periodic table and adjacent to each other, with similar ionic radius and some chemical properties, so the doping will not significantly affect the original structure. Compared with lithium iron phosphate High voltage: The charging voltage is increased from 3.4V to 4.1V for lithium iron phosphate. High energy density: Theoretical 15-20% increase in battery energy density, providing longer range, LFP has reached the upper limit. Low temperature performance improvement: LMFP has a capacity retention rate of 76% at -20°C, compared to 60-70% for LFP. Compared to ternary cathode materials Improved safety: LFP and LMFP are both olivine shaped structure, which is more stable than the layer oxide structure of ternary batteries. LFP and LMFP have olivine structure, which is more stable and safer than ternary batteries. Email: tob.amy@tobmachine.com Skype: amywangbest86 Whatsapp/Phone number: +86 181 2071 5609

1.Determination of iron content in anode graphite   The sample to be measured was dissolved under the condition of heating (1+1) HCl solution, and then the concentration of iron content in the sample to be measured was measured by atomic absorption spectrophotometer standard curve method.   Apparatus: Atomic absorption spectrometer, analytical balance, electric furnace, 250mL volumetric flask, 100mL volumetric flask, beaker, glass rod, funnel   Reagent: AR (1+1) hydrochloric acid   （1）Prepare standard solutions of Fe, 0 ppm, 0.5 ppm, 1 ppm and 1.5 ppm. （2）About 5 g of graphite was weighed in a 150 mL beaker in an analytical balance, 80 mL (1+1) of HCl was added and heated on a heating plate for about 30 min; the heated sample was cooled and filtered, fixed into a 100 mL volumetric flask, and the iron content was measured by atomic absorption spectrometry. （3）Turn on the computer→Open the instrument→Enter the working software→System reset (reset once per power on)→Tap OK after the reset is completed→Element selection→Condition setting→Wavelength positioning→Automatic energy to about 100%. （4）Open the air valve, adjust the output pressure 0.2~0.3MPa, then open the acetylene valve, adjust the pressure to 0.05~0.1MPa, press the host acetylene switch, adjust the acetylene switch to make the acetylene flow to the scale line, and ignite immediately. （5）The testing sequence is specimen blank→specimen blank→sample blank→sample test. Calculation：         2.Test method for particle size of negative graphite In the propagation of light, the wave source is restricted by the gap or particle of the same wavelength scale, and the emission of each element wave at the restricted source interferes in space to produce diffraction and scattering, and the spatial (angular) distribution of the diffracted and scattered light energy is related to the wavelength of the light wave and the scale of the gap or particle. With laser as the light source, the light is monochromatic with a certain wavelength, and the spatial (angular) distribution of diffracted and scattered light energy is only related to the particle size. For the diffraction of the particle group, the amount of each particle level determines the size of the light energy obtained at each specific angle, and the proportion of each specific angle light energy in the total light energy should reflect the distribution abundance of each particle level.   Instruments:laser particle size analyzer, ultrasonic cleaning machine, glass rod, beaker Reagent: Glycerol solution （1）Check whether the instrument power supply and water source are well connected. Turn on the power of the host (preheat for 30 minutes), then turn on the computer in turn to enter the instrument operation interface and turn on the water source. （2）Configure the dispersant: add a few drops of propanetriol to a 150mL beaker, dilute to 50mL with water, and mix well. （3）Sample preparation: add an appropria...

Internal resistance is one of the important indicators to evaluate the performance of lithium batteries. The test of internal resistance includes AC internal resistance and DC internal resistance. For single cell batteries, the AC internal resistance is generally evaluated as AC internal resistance, which is usually called ohmic internal resistance.  However, for large battery pack applications, such as power supply systems for electric vehicles, due to the limitations of test equipment and other aspects, it is not possible or convenient to directly test the AC internal resistance, and the characteristics of the battery pack are generally evaluated by DC internal resistance. In practical applications, DC internal resistance is also mostly used to evaluate the health of the battery, to make life prediction, and to make estimation of system SOC, output/input capacity, etc. In production, it can be used to detect phenomena such as faulty cells such as micro-short circuits.   The principle of DC internal resistance testing is to calculate the DC internal resistance of a battery by applying a high current (charging or discharging) to the battery or battery pack for a short period of time, before the battery has reached full internal polarization, based on the voltage change of the battery before and after the applied current and the applied current. Four parameters must be selected to test the DC internal resistance: current (or adopted multiplier), pulse time, state of charge (SOC), and test environment temperature. The variation of these parameters has a large impact on the DC internal resistance.   DC internal resistance not only includes the ohmic internal resistance part of the battery pack (AC internal resistance part), but also partly includes some polarization resistance of the battery pack. And the polarization of the battery is more influenced by the current, time and so on.   At present, the commonly used DC internal resistance test methods are the following three.   (1) HPPC test method in the U.S.《Freedom CAR Battery Test Manual》: the test duration is 10s, the applied discharge current is 5C or higher, and the charging current is 0.75 of the discharge current. the specific current selection is based on the characteristics of the battery to develop.   (2) Japanese JEVSD713 2003 test method, originally mainly for Ni/MH batteries, later also applied to lithium-ion batteries, first establish the current-voltage characteristic curve of the battery under 0~100% SOC, alternately charge or discharge the battery under the set SOC with the current of 1C, 2C, 5C, 10C, respectively, the charging or discharging time is 10s, and calculate the DC internal resistance of the battery. The DC internal resistance of the battery is calculated.   (3) The test method proposed in the "High Power Lithium-ion Power Battery Performance Test Specification for HEV" of China's "863" program, the test duration is 5s, the charging...