6S LIPO BATTERY EC5 Polar Tablets Thickening and Control
SummaryProfessional 6S Lipo Battery EC5 Manufacturer CNHL believes that the quality of the polar film is related to the development of the mid -range assembly process of 6S Lipo Battery EC5, which also affects the electrochemical performance of the rear segment and the 6S Lipo Battery EC5.
In actual production, sometimes it will be found that the 6S Lipo Battery EC5 pole tablets will increase the thickness of the polar film after a few hours or after other processes. Bounce.
6S Lipo Battery EC5 pole film is at different stages, and its thickness rebound (such as roller bombing, dry rebound, charging and rebound, etc.) is different. The most fundamental reason is that the choice of compact density is unreasonable.
1. 6S Lipo Battery EC5 pole rebound
During the production process of 6S LIPO BATTERY EC5, the polar manufacturing belongs to the previous process and occupies an important position in the entire process. The quality of the pole film is related to the development of the mid -range assembly process of 6S Lipo Battery EC5, which also affects the electrochemical performance of the rear segment and the 6S
Lipo Battery EC5.
Polar film manufacturing is mainly composed of slurry preparation, collecting flowing live substance, polar roller pressure, and polar segmentation.
The scattered 6S Lipo Battery EC5 slurry is coated on the positive and negative polar aluminum foil or copper foil through the slit squeeze or the estimated metastasis. The excess water or NMP solvent in the EC5 pulp forms the original
6S Lipo Battery EC5 electrode chip.
The original pore rate of the 6S Lipo Battery EC5 polar sheet completed is high, the adhesive is low, and it is not conducive to the infiltration of the electrolyte, the non -the -induced resistance resistance of the living material particles, and the 6S Lipo Battery EC5. The disadvantages seriously affected the performance of the 6S Lipo Battery EC5 electrochemical performance. Therefore, the 6S Lipo Battery EC5 pole film after the coating needs to improve its performance through rolling process.
From coating to rollers, the 6S Lipo Battery EC5 polar film has undergone a process from thick to thin, pore rate from large to smaller. The electrode chip we expect is on the basis of not destroying the shape of the positive and negative living material particles, and has an appropriate pore rate and the smallest interface contact resistance.
It means that under the above basis, the thinner the thickness of the 6S Lipo Battery EC5 pole, the better, but in actual production, sometimes it will be found that the polar film will be more thick than the roller after a few hours or after other processes. The phenomenon of the thickness of the 6S Lipo Battery EC5 pole film is increased. This is the rebound of the polar film.
The pole is at different stages, and its thickness rebound (such as roller bombing, dry rebound, charge and bombardment, etc.) is different.
The most fundamental reason is that the choice of compact density is unreasonable.
Under normal circumstances, the 6S Lipo Battery EC5 raw material supplier will provide a maximum density range of 6S Lipo Battery EC5 enterprises. This density range is obtained based on parameters such as the real density, material composition, and hardness of the material.
The selection of compact density is too large or too small is incorrect. The pore rate of the compact density is too high in the pores in the small chip, and the contact particles are not tightly contacted. Chemical properties; excessive compaction density will cause destruction of living material structure. There is no sufficient gap between the particles.
2.he impact of pole rebound on the production of 6S Lipo Battery EC5
6S Lipo Battery EC5 Polarity thickness is also normal after rolling, but if the rebound value is large, it may affect the performance of the battery packaging in the middle and 6S Lipo Battery EC5 performance. After the roller press, the pole sheet will continue to rebound after 1-2H, and then the thickness value will become stable.
In addition to considering the thickness of the static polar sheet after rolling, the 6S Lipo Battery EC5 polar sheet will also change the rebound value after baking. After the battery shell or aluminum -plastic film is encapsulated, after injecting the electrolyte inward, with the penetration of the electrolyte, the solvent molecules enter the gap of the polar particles, occupying the internal space of the polar sheet, causing the volume of the polar sheet to increase, and it will also be increased. As a result, the overall thickness increases.
During the use of 6S Lipo Battery EC5, due to the decomposition of electrolytes, the expansion of gas production and lithium -ion dehydration, etc., it may cause the design value of the overall thickness of the 6S Lipo Battery EC5 exceeding 6s Lipo Battery EC5, which causes drum bags to cause safety problems.
3.Control 6s Lipo Battery EC5 polar sheet rebound
➤Choose a reasonable density density
For the rebound of the 6S Lipo Battery EC5 pole film, the appropriate compact density value should be selected. Only by selecting the appropriate compact density value can we take into account the thickness of the 6S Lipo Battery EC5 and the thickness of the 6S Lipo Battery EC5. for example:
Three types of compact density are positive poles, which are polar A compact density of 3.75g/cc, polar B compact density of 3.85g/cc, and polar C -compact density of 3.95g/cc.
Test the thickness of the chip thickness after drying and the pre -charged after drying, and calculate the rebound rate of the thickness of the polar tide after the roller press. The result of the rebound rate is shown in Table 1:
▲ The rebound rate of different compact density and lower pole film (%)
It can be seen that as the polar decar density increases, the thickness of the rebound before pre -charging. Although at a lower compact density (3.75G/CC), the thickness rebound rate before the pre -charging of the pole after baking is 2.33%.
However, after the pre -charging, the thickness rebound rate of polar A exceeds the polar B. During the pre -charging process of 6S LIPO BATTERY EC5, lithium ions are removed from the positive electrode material and embedded in the negative pole through the electrolyte.
For polar C, the contact between the particles is tight, the electrolyte infiltration is more difficult, and the lithium ion cannot be smoothly removed into the negative electrode material from the positive pole during the pre -charged. At the same time Highest.
For too small compact density pole A, due to the non -tight contact of the living material particles in A, the pore rate is large, the electrolyte enters the electrode gap, resulting in the thickness of the 6S Lipo Battery EC5 polar sheet. Therefore, choosing the appropriate compact density is crucial.
➤Improve the roller pressure process
After making and electrochemical performance evaluation through the 6S Lipo Battery EC5, the best living density density of the live body is confirmed. After that, it is necessary to improve the roller pressure accuracy of the roller pressure process to ensure that the experimental design value is in line with the actual value of the roller.
In order to improve the accuracy of roller compression and reduce the rebound value of the polar tide, the first is to use a secondary roller pressure, and the other is to use the heat roller process.
During the production process of 6S Lipo Battery EC5, due to the faster roller pressure, the rebound properties of different material poles are also different, and one roller often cannot meet the requirements of the thickness, compact density and quality of the polar tide. It can effectively improve the problem of roller compression accuracy.
Generally speaking, the second roller pressure needs to be performed in the dry room after 2 hours of roller press. The interval between 2 hours is to ensure that the polar film has sufficient time flexibility and maintains a stable state.
6S LIPO BATTERY EC5 Polar Tablet Hot Rolling Craft is also one of the effective solutions to reduce the rebound of the polar sheet. The main purpose of the hot -rolled process is:
① Remove the water in the pole film;
② Reduce the rebound rate of the surface material after rolling. The hot rolling can reduce the polar rebound by about 50%;
③ Eliminate the internal stress of the polar sheet, because when the segmentation or membrane cutting processes, the 6S Lipo Battery EC5 polar tablets often produce adverse phenomena such as snake -shaped and flip due to the release of the internal stress;
④ During the hot rolling process of 6S Lipo Battery EC5, the adhesive in the 6S Lipo Battery EC5 material is in a melting state, which can enhance the adhesion between the active substance and the collector, otherwise it is easy Show off and drop.
⑤ Reduce the deformation resistance of the 6S Lipo Battery EC5 pole film, causing the pore frame structure of the active substances on the polar sheet to not be destroyed, which is conducive to improving the improvement of the active substance absorbing index.
There are two main ways of hot -rolled technology. One is to compact the 6S Lipo Battery EC5 polar sheet. Heat the polar sheet before the roller to 180 degrees Celsius, and then rolled it. The thickness of the pole can be controlled at ± 2 microns.
Another way is to heat the roller of the roller and perform the roller. This heat roller process needs to take into account the temperature distribution of the roller and the heating of the roller.
Well, the above is the full content of 6S Lipo Battery EC5 polar tide thickness rebound and control that the CNHL professional 6S Lipo Battery EC5 manufacturer. I hope the above content can help you better understand the generation of the 6S Lipo Battery EC5 polar rebound. The impact of polar rebound on the production of 6S Lipo Battle EC5 and the way to control the 6S Lipo Battery EC5 pole rebound. More 6S Lipo Battery EC5 Polar information can be checked below:
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