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May , 13 2022
Pole piece coating generally refers to a process in which a uniformly stirred slurry is evenly coated on the current collector, and the organic solvent in the slurry is dried. The effect of coating has an important impact on battery capacity, internal resistance, cycle life and safety. The reasons for wrinkling during the coating process are as follows: 1. First of all, the installation accuracy o...
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May , 24 2022
1. Failure: Unwinding correction limit Reason: When the unwinding mechanism is wearing the tape, the tape is not centered in the mode Solution: Adjust the sensor position or center the reel position 2. The upper and lower limits of the discharge floating roller are faulty Reason: The discharge pressure roller is not pressed tightly or the winding tension is not opened, and the potentiometer is abn...
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Jun , 01 2022
The polymer lithium-ion battery cell adopts aluminum laminated film composite packaging technology. When gas is generated inside the battery cell due to the occurrence of abnormal chemical reactions, the pocket will be charged and the battery core will swell.The performance of the battery cell (Capacity, Cycle life, C-rate, etc.) will fail seriously, making the battery cell unusab...
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Jun , 17 2022
Advantages and Disadvantages Of Ternary Lithium Battery Many people say that the lithium iron phosphate battery should be fully charged, and the ternary lithium battery should be charged to more than 90%. The reason is that the voltage of the lithium battery will increase after it is fully charged, which will affect the activity of the electrolyte and positive and negative materials, resulting in ...
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Jun , 28 2022
The lithium-ion battery slurry coating process is a process in which a non-Newtonian fluid contacts, flows, and solidifies a solid substrate.Different from the contact between the solid state, the lithium battery slurry is sprayed from the coating head and coated on the copper foil and aluminum foil, and there will be dynamic changes in the liquid state, including adhesion, wetting, leveling, rebo...
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Jul , 07 2022
The principle of ultrasonic metal welding is a special method of using the mechanical vibration energy of ultrasonic frequency to connect the same metal or dissimilar metal. When the metal is ultrasonically welded, it neither transmits current to the workpiece nor applies a high temperature heat source to the workpiece, but under static pressure, the frame vibration energy is converted into fricti...
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Jul , 26 2022
In the production process of lithium batteries, the compaction density has a great influence on the battery performance.Generally speaking, the compaction density is closely related to the specific capacity, efficiency, internal resistance, and cycle performance of the battery.the greater the compaction density, the greater the degree of extrusion between the material particles, the smaller the po...
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Aug , 09 2022
SEI (Solid Electrolyte Interphase) is also a solid electrolyte interface membrane. When a lithium-ion battery is charged and discharged for the first time, a small amount of polar aprotic solvent in the electrolyte undergoes a reduction reaction after gaining some electrons, and combines with lithium ions to form an interface film with a thickness of about 100-120nm, which is SEI. SEI is usually f...
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Sep , 02 2022
In the production process of pouch cell battery, there are many factors that can lead to abnormal gas production, which can be divided into several categories: First, the film formation of the cell itself is unstable. In the subsequent cycle process, the SEI film on the surface of the negative electrode may fall off or become loose, and the SEI film(SEI Formation Machine) is reconstructed, accompa...
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Oct , 11 2022
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Oct , 11 2022
The negative electrode material is made into a negative electrode sheet by mixing, coating, rolling, shooting, and drying.Use a lithium sheet as the positive electrode, assemble it into a button battery for testing, and calculate the gram capacity of the material by testing the capacity of the button battery. Required materials and equipment; Positive powder Electrolyte LB-5275 Carbon black KS-6 A...
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Nov , 01 2022
During the coating process, various defects may occur on the film surface, such as bubbles, fat edges, craters, polygonal depressions, orange peels, etc. Shrinkage cavities are one of the most common problems.The surface depression of the coating film, that is, the shrinkage cavity, is fundamentally caused by the surface tension gradient generated during the film formation. This phenomenon is call...
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