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Step 1: Raw materials

1. Solution Production

A) The mixing ratio and weight of PVDF (or CMC) and solvent NMP (or deionized water);

B) Mixing time, mixing frequency, solution frequency (and solution surface temperature);

C) Check the solution after production: viscosity (inspection), solubility (visual inspection), and storage time;

D) Negative electrode: SBR+CMC solution, mixing time and frequency.

2. Active substances

A) When weighing and mixing, monitor whether the mixing ratio and quantity are correct;

B) Grinding Ball: Positive and Negative Pole Grinding Ball Time; The proportion of agate pellets and mixture in the ball mill drum; Examples of large and small agate balls;

C) Baking: Set the baking temperature and time; After baking, cool down and check the temperature.

D) Mixing of active substances with solutions: mixing method, mixing time, and frequency.

Screening: 100 mesh (or 150 mesh) molecular sieve.

F) Inspection and testing:

Perform the following tests on the mixed slurry: solid content, viscosity, mixing fineness, vibration density, and mixing slurry density.

Step 2: Coating

1. First inspection of collected liquid

A) Inlet standards (length, width, thickness);

B) Recognition of standard (practical) components for fluid collection;

C) The hydrophilicity (hydrophobicity) and appearance (presence or absence of abrasions, scratches, and damage) of the collected liquid.

2. Calculation of repair quantity (standard value, upper and lower limits)

A) Single side trimming amount (determined by the thickness of the polarizer close to this standard);

B) Double sided trimming amount (determined by the thickness of the board closest to this standard).

3. Admit the mud

Is it too thick (too thin) and has good fluidity? Are there any particles, excessive bubbles, or dry lumps.

4. Action of polar plates

A) Confession density (slice thickness);

B) Appearance: Whether there are streaks or broken bands, whether the material (opposite the roller or pole piece) is too thick, whether it is dry or burnt, and whether there are exposed copper or foreign particles;

5. Workpiece

Standard intake without burrs, visual inspection.

Step 3: Production (previous item)

1. Tablet computer

A) The type of instruction and the standard thickness of the positive and negative electrode plates for that type;

B) The thickness and appearance of the highest level pole piece after compression (No. 1 or No. 1, No. 2).

C) Plate strength inspection;

2. Fragments

A) Blade standards, standards (length, width), and appearance recognition of large rod components;

B) The width of the slice;

C) Whether the small piece has burrs, wrinkles, tilts, or hidden areas (positive).

3. Individual scales

A) There is no classification error in weighing;

B) Appearance inspection: standard deviation (electrode plate standard, material drop, crease, damage, floating material, not scratched, etc.).

4. Roasting

A) Setting of oven temperature and time;

B) N2 and vacuum (visible surface) on time and at time distance.

1. Explanation of the length, width, and thickness of aluminum and nickel bars;

2. Robustness of spot welding of aluminum and nickel strips;

3. Adhesive paper must be pasted according to the tolerance length required by the process;

4. The surface of the polarizer should be free of dust.

Step 5: Block the ball

1. Cutting the connecting plate: measure the standard and check for burrs or compression;

2. Cleaning the connector: Check if the connector is clean;

3. Annealing of the connecting plate: Check the unused graphite powder cover, oven temperature, and when to put it in and take it out;

4. Assembly cover: Check whether each accessory is consistent with the model of the day and whether the installation is in place;

5. Stamping cover: Check the stamping height and appearance;

6. Full inspection: Check the self inspection function of employees in the previous process to prevent defective products from flowing into the next process;

7. Folding joint: Check for leakage, folding, cracking, and folding in place;

8. Point cap: Check for leaks, gaps, and wear points;

9. Full inspection: Check the self inspection function of employees in the previous process to prevent defective products from flowing into the next process;

10. Casing: Inspection standards and casing position;

Baking: Baking temperature, time, and baking effect.

Step 6: Conclusion

1. Standards for various types of identification paper, tape measures, and rolled steel (aluminum) shells;

2. Identification status of the overall storage chip;

3. Point cathode strength (steel aluminum shell); The durability of the aluminum shell positive electrode and the appearance of the negative electrode;

4. Placement of insulation gaskets;

5. Fold the cover (aluminum shell) and pay attention to the exposure of debris and the maintenance of the appearance of the aluminum shell;

6. Fixed point: deviation.

7. Be careful to pull down 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. Leakage detection station;

4. Adhesive.

5. Be careful to pull down first.

Step 8: Inject liquid

1. Various infusion volumes;

2. Glove box humidity and indoor humidity;

3. Check the battery humidity, deflation, and vacuuming time;

4. Place the battery in the oven before baking;

After baking the battery for 12 hours, replace the bottom layer of the battery;

6. Seal the battery before and after injection.

Step 9: Testing

1. Set volume division and conversion parameters;

2. Can the staff remove the electrolyte in a timely manner when it forms;

3. Supervise the operations of new employees in the production department;

4. Is there any adhesive paper on the battery that falls off from the injection hole after injection;

5. Test whether the battery has obvious different markings;

6. Identify the reason for lighting a cigarette earlier;

7. Proofreading of points after blasting;

8. The difference between steel shell cabinets and aluminum shell cabinets;

What kind of seal should be pinched upside down

10. Whether the aluminum core is deformed due to sealing and kneading;

11. Whether it is cleaned in a timely manner after sealing;

12. Whether the fixture head is clean and corroded;

13. After blasting, inquire about the voltage of the cabinet connected to the computer, as well as the status of the voltage and current curves at that point;

14. Suitable environmental temperature and humidity, aging and sealed areas.

1. Some customers complained about insufficient capacity and added 2 minutes of capacity;

2. Control the lower limit of Tianyu standards;

3. When changing the battery type, is the entire pull rod cleaned to prevent mixing;

4. Are the detected defective products packaged in red turnover boxes with clear markings;

5. Whether orders with special requirements are understood and executed by employees;

6. Whether the spraying content is correct, and whether the spraying direction and direction are correct;

7. Are there adhesives on the pressure plate and rivets;

8. Check if the instrument is within its validity period and prevent the use of the instrument online (on all radio stations).

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