Introduction to the Process of Snap in Aluminum Electrolytic Capacitor Solder Pin Electrolytic Capacitor

Process description:

Cutting: Use a cutting machine to cut the purchased positive foil, negative foil, and electrolytic paper according to the required specifications.

Nail roll: Use a nail roll machine to nail roll the purchased guide pins and cut positive foil, negative foil, and electrolytic paper.

Baking: Use a small oven to bake the workpiece at a temperature of about 60 ℃~70 ℃, which cannot reach the melting temperature of the workpiece. There is no production or emission of process waste gas, only a small amount of water vapor is generated and emitted.

Immersion: Use an immersion machine to immerse the baked semi-finished product in electrolyte. The immersion material is a purchased finished electrolyte (electrolyte preparation is not carried out in this project). Due to the presence of LiPF6 in the electrolyte used in this project, contact with water vapor in the air can cause decomposition and affect the performance of the capacitor. Therefore, the immersion machine is a sealed device. When the immersion machine is working, a vacuum pump is used to extract the air from the sealed stainless steel cover and fill it with nitrogen for protection. The entire liquid injection process is carried out under sealed and isolated air conditions. The electrolyte is injected into the capacitor through a fully sealed pipeline. This process is carried out at room temperature and pressure in an extremely dry environment (the humidity of the sealed liquid injection glove box is below 1%). Therefore, the electrolyte will not evaporate into the air during the liquid injection process. However, a very small amount of electrolyte evaporates into the sealed workshop during workpiece replacement, and the exhaust gas is carried away by the dehumidifier's circulating exhaust system and enters the dehumidifier to form condensate.

Assembly: Use an assembly machine to assemble the baked workpiece with purchased rubber particles and aluminum shells.

Cleaning: The semi-finished products after assembly are manually cleaned in the cleaning tank using regular tap water without adding any cleaning agents.

Spin drying: Use a spin dryer to spin dry the residual moisture on the surface of the cleaned semi-finished product.

Sleeve: Use a sleeve machine to fit a rubber hose onto the semi-finished product after spin drying.

Serial arrangement: Use a serial arrangement machine to string the semi-finished products after the casing onto the charging board for easy charging in the subsequent process.

Charging: Use a charging power source to charge the semi-finished products arranged in series.

Testing: Use fully automatic charging testing machines, large ovens, and other equipment to test the semi-finished products after charging. This process produces a small amount of defective products and noise. Defective products are returned to the corresponding process for repair until they are qualified.

Foot cutting: Use a foot cutting machine to cut the feet of the semi-finished products that have passed the test.

Packaging: The finished product obtained through the above process can be shipped after packaging.

Note: LiPF6 in the electrolyte composition of the project has strong deliquescence and is easily soluble in water, as well as low concentration organic solvents such as methanol, ethanol, acetone, carbonates, etc. It decomposes when exposed to air or heated. When exposed to air or heated, lithium hexafluorophosphate rapidly decomposes in the air due to the action of water vapor, releasing PF5 and producing white smoke. Due to the fact that the electrolyte injection process of the project is carried out under sealed and air isolated conditions, and the working temperature is designed to be 27 ℃ with humidity ≤ 1%, LiPF6 in the electrolyte will not decompose and release fluoride waste gas.

The project does not include processes such as acid washing, phosphating, painting, powder coating, transfer printing, etc.