Explanation of several key processes in lithium battery processing

2. Active material A) When weighing and mixing, monitor whether the mixing ratio and quantity are correct; B) Grinding ball: positive and negative grinding ball time; the ratio of agate pellets to the mixture in the ball mill barrel; the large balls in the agate ball and Examples of small balls; C) Baking: set the baking temperature and time; after baking, cool down and check the temperature. D) Mixing of active substance and solution: mixing method, mixing time and frequency. Sieve: 100 mesh (or 150 mesh) molecular sieve. F) Inspection and inspection: The following tests are carried out on the stirring slurry: solid content, viscosity, stirring fineness, vibration density, and stirring slurry density. Step 2: Coating 1. First check the collection fluid A) Inflow standard (length, width, thickness); B) Approval of the standard (practical) component of fluid collection; C) Hydrophilicity (hydrophobicity) of the collection fluid Sex) and appearance (with or without scratches, scratches and damage). 2. Calculation of the amount of trimming (standard value, upper and lower limits) A) single-sided trimming (the thickness of the single-sided pole piece is determined by the thickness of the pole piece close to this standard); B) the double-sided trimming (using the thickness of the plate closest to this standard) Determine the thickness of both sides). 3. Acknowledge whether the mud is too thick (too thin) with good fluidity, whether there are particles, too much foam, and whether it is dry. 4. The action of the pole plate A) confession specific gravity (thickness of the slice); B) appearance: whether there are streaks, broken belts, whether the material (the roller or the opposite side of the pole piece) is too thick, whether it is dry or burnt, whether there is bare Copper or foreign particles; 5. The standard air intake of the workpiece has no burrs, and the appearance is inspected. The third step: processing (previous item) 1. Tablet PC A) the type and the standard thickness of the positive and negative plates of this type; B) the thickness and appearance of the highest level pole piece after pressing (No. 1 or No. 1, No. 2 ). C) Plate strength inspection; 2. Fragments A) Blade standard, standard (length, width) and appearance recognition of large rods; B) Slice width; C) Whether there are burrs, wrinkles, tilts or blanking in small pieces ( Positive). 3. Separate scale A) There is no classification error in weighing; B) Visual inspection: standard out of tolerance (plate standard, material falling, crease, damage, floating material, not scratched, etc.). 4. Baking A) Setting of oven temperature and time; B) Time and distance between N2 and vacuum (visible surface). 1. Description of the length, width and thickness of aluminum and nickel strips; 2. Robustness of spot welding of aluminum and nickel strips; 3. Self-adhesive paper must be pasted according to the tolerance length required by the process; 4. The surface of the pole piece should be No dust. Step 5: Stop the ball 1. Cut the connecting plate: measure the standard, check whether there is burr or compression; 2. Clean the joint: check whether the joint is clean; 3. Anneal the connecting plate: check the useless graphite powder cover, the oven temperature, and what 4. Assemble the cover: check whether the accessories are consistent with the model of the day and whether the installation is in place; 5. Stamping cover: check the height and appearance of the stamping; 6. Full inspection: check the staff self-inspection function of the previous process to prevent Defects flow into the next process; 7. Folding joints: check for leakage, folding, cracks, and folding in place; 8. Dot cap: check for leaks, empty spots and wear spots; 9. Full inspection: check the front line Process staff self-check function, to prevent defective products from flowing into the next process; 10. Casing: check the standard and casing position; baking: baking temperature, time, baking effect. Step 6: Finishing 1. Standards for various identification papers, tape measures and coiled steel (aluminum) shells; 2. Identification status of the total memory chip; 3. Point cathode strength (steel aluminum shell); robustness of the aluminum shell anode And the appearance of the negative electrode; 4. Placement of insulating gasket; 5. Fold the gland (aluminum shell), pay attention to the exposure of debris and maintain the appearance of the aluminum shell; 6. Fixing point: deviation. 7. Pull down carefully first. Step 7: Welding 1. Pay attention to sand holes when welding steel shell batteries and aluminum shell batteries; 2. Aluminum shell welding debugging and welding process inspection; 3. Leak detection station; 4. Glue. 5. Pull down carefully first. The eighth step: inject liquid 1. Various infusion volume; 2. Glove box humidity and indoor humidity; 3. Check battery humidity, venting and vacuuming time; 4. Put the battery in the oven before baking; 5. Battery After baking for 12 hours, replace the bottom layer of the battery; 6. Seal the battery before and after injection. Step 9: Test 1. Set the volume division and conversion parameters; 2. When the electrolyte is formed, whether the staff can remove it in time; 3. Supervise the operation of new employees in the processing department; 4. Whether there is adhesive paper on the battery after the injection Fall off from the liquid injection hole; 5. Test whether the battery has obvious different marks; 6. Find out the reason for earlier lighting; 7. Check the point after the blasting; 8. The difference between the steel cabinet and the aluminum cabinet; 9. What kind of seal should you pinch upside down? 10. Whether the aluminum core is deformed due to sealing and kneading; 11. Whether it is cleaned in time after sealing; 12. Whether the clamp head is clean and corroded; 13. After blasting, ask about the voltage of the cabinet connected to the computer. And the state of the voltage and current curve at this point; 14. The ambient temperature and humidity are appropriate, and the aging and sealing area. 1. Some customers complained about insufficient capacity and added 2 minutes of capacity; 2. Control the lower limit of Tianyu standard; 3. When changing the battery type, whether to clean up the entire pull rod to prevent mixing; 4. Whether the detected defective products use a red turnover box The packaging is clearly marked; 5. Whether the orders with special requirements are understood and executed by the staff; 6. Whether the spraying content is correct, whether the spraying direction and direction are correct; 7. Whether there is glue on the pressure plate and rivets; 8. Check whether the instrument is in place During the validity period, prevent the use of the device on the Internet (all radio stations). Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete.